keystore.cpp revision a9a17eeca2f5d9d3101a7e0bb136360697b6e2f0
1a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root/* 2a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * Copyright (C) 2009 The Android Open Source Project 3a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * 4a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * Licensed under the Apache License, Version 2.0 (the "License"); 5a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * you may not use this file except in compliance with the License. 6a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * You may obtain a copy of the License at 7a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * 8a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * http://www.apache.org/licenses/LICENSE-2.0 9a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * 10a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * Unless required by applicable law or agreed to in writing, software 11a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * distributed under the License is distributed on an "AS IS" BASIS, 12a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * See the License for the specific language governing permissions and 14a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * limitations under the License. 15a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root */ 16a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root//#define LOG_NDEBUG 0 1807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root#define LOG_TAG "keystore" 1907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 20a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <stdio.h> 21a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <stdint.h> 22a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <string.h> 23aaf9802da6cea710e0777abb852724e1825cad63Elliott Hughes#include <strings.h> 24a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <unistd.h> 25a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <signal.h> 26a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <errno.h> 27a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <dirent.h> 28655b958eb2180c7c06889f83f606d23421bf038cKenny Root#include <errno.h> 29a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <fcntl.h> 30a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <limits.h> 31822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root#include <assert.h> 32a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <sys/types.h> 33a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <sys/socket.h> 34a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <sys/stat.h> 35a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <sys/time.h> 36a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <arpa/inet.h> 37a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 38a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <openssl/aes.h> 39822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root#include <openssl/bio.h> 40a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <openssl/evp.h> 41a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <openssl/md5.h> 42822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root#include <openssl/pem.h> 43a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 4480843db63ed6b61c953a1243801117a15c9e8c38Shawn Willden#include <hardware/keymaster0.h> 4570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 4667d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker#include <keymaster/soft_keymaster_device.h> 470400675b20e36b976ec13b63e290e6d5d19bf654Shawn Willden#include <keymaster/soft_keymaster_logger.h> 480400675b20e36b976ec13b63e290e6d5d19bf654Shawn Willden#include <keymaster/softkeymaster.h> 4917208e0de5a42722901d803118745cca25fd10c1Kenny Root 5026cfc08add3966eca5892e3387cf5ed6dc3068fbKenny Root#include <UniquePtr.h> 51655b958eb2180c7c06889f83f606d23421bf038cKenny Root#include <utils/String8.h> 52655b958eb2180c7c06889f83f606d23421bf038cKenny Root#include <utils/Vector.h> 5370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 5407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root#include <keystore/IKeystoreService.h> 5507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root#include <binder/IPCThreadState.h> 5607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root#include <binder/IServiceManager.h> 5707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 58a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <cutils/log.h> 59a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <cutils/sockets.h> 60a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <private/android_filesystem_config.h> 61a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 6207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root#include <keystore/keystore.h> 63a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 64eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn#include <selinux/android.h> 65eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 663a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker#include <sstream> 673a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 68d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker#include "auth_token_table.h" 6996427baf0094d50047049d329b0779c3c910402cKenny Root#include "defaults.h" 709221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden#include "keystore_keymaster_enforcement.h" 7140a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker#include "operation.h" 7296427baf0094d50047049d329b0779c3c910402cKenny Root 73a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root/* KeyStore is a secured storage for key-value pairs. In this implementation, 74a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * each file stores one key-value pair. Keys are encoded in file names, and 75a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * values are encrypted with checksums. The encryption key is protected by a 76a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * user-defined password. To keep things simple, buffers are always larger than 77a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * the maximum space we needed, so boundary checks on buffers are omitted. */ 78a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 79a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#define KEY_SIZE ((NAME_MAX - 15) / 2) 80a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#define VALUE_SIZE 32768 81a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#define PASSWORD_SIZE VALUE_SIZE 82a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 83822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 8496427baf0094d50047049d329b0779c3c910402cKenny Rootstruct BIGNUM_Delete { 8596427baf0094d50047049d329b0779c3c910402cKenny Root void operator()(BIGNUM* p) const { 8696427baf0094d50047049d329b0779c3c910402cKenny Root BN_free(p); 8796427baf0094d50047049d329b0779c3c910402cKenny Root } 8896427baf0094d50047049d329b0779c3c910402cKenny Root}; 8996427baf0094d50047049d329b0779c3c910402cKenny Roottypedef UniquePtr<BIGNUM, BIGNUM_Delete> Unique_BIGNUM; 9096427baf0094d50047049d329b0779c3c910402cKenny Root 91822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Rootstruct BIO_Delete { 92822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root void operator()(BIO* p) const { 93822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root BIO_free(p); 94822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 95822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root}; 96822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Roottypedef UniquePtr<BIO, BIO_Delete> Unique_BIO; 97822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 98822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Rootstruct EVP_PKEY_Delete { 99822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root void operator()(EVP_PKEY* p) const { 100822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root EVP_PKEY_free(p); 101822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 102822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root}; 103822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Roottypedef UniquePtr<EVP_PKEY, EVP_PKEY_Delete> Unique_EVP_PKEY; 104822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 105822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Rootstruct PKCS8_PRIV_KEY_INFO_Delete { 106822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root void operator()(PKCS8_PRIV_KEY_INFO* p) const { 107822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root PKCS8_PRIV_KEY_INFO_free(p); 108822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 109822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root}; 110822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Roottypedef UniquePtr<PKCS8_PRIV_KEY_INFO, PKCS8_PRIV_KEY_INFO_Delete> Unique_PKCS8_PRIV_KEY_INFO; 111822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 112bd07a239085228c25898bc6cdece8b1b8758df83Chad Brubakerstatic int keymaster_device_initialize(keymaster1_device_t** dev) { 11370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root int rc; 11470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 11570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root const hw_module_t* mod; 116bd07a239085228c25898bc6cdece8b1b8758df83Chad Brubaker keymaster::SoftKeymasterDevice* softkeymaster = NULL; 11770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root rc = hw_get_module_by_class(KEYSTORE_HARDWARE_MODULE_ID, NULL, &mod); 11870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root if (rc) { 11970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root ALOGE("could not find any keystore module"); 12070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root goto out; 12170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 12270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 123bd07a239085228c25898bc6cdece8b1b8758df83Chad Brubaker rc = mod->methods->open(mod, KEYSTORE_KEYMASTER, reinterpret_cast<struct hw_device_t**>(dev)); 12470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root if (rc) { 12570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root ALOGE("could not open keymaster device in %s (%s)", 12670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root KEYSTORE_HARDWARE_MODULE_ID, strerror(-rc)); 12770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root goto out; 12870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 12970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 130bd07a239085228c25898bc6cdece8b1b8758df83Chad Brubaker // Wrap older hardware modules with a softkeymaster adapter. 131bd07a239085228c25898bc6cdece8b1b8758df83Chad Brubaker if ((*dev)->common.module->module_api_version >= KEYMASTER_MODULE_API_VERSION_1_0) { 132bd07a239085228c25898bc6cdece8b1b8758df83Chad Brubaker return 0; 133bd07a239085228c25898bc6cdece8b1b8758df83Chad Brubaker } 134bd07a239085228c25898bc6cdece8b1b8758df83Chad Brubaker softkeymaster = 135bd07a239085228c25898bc6cdece8b1b8758df83Chad Brubaker new keymaster::SoftKeymasterDevice(reinterpret_cast<keymaster0_device_t*>(*dev)); 136bd07a239085228c25898bc6cdece8b1b8758df83Chad Brubaker *dev = softkeymaster->keymaster_device(); 13770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return 0; 13870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 13970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Rootout: 14070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root *dev = NULL; 14170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return rc; 14270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root} 14370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1440400675b20e36b976ec13b63e290e6d5d19bf654Shawn Willden// softkeymaster_logger appears not to be used in keystore, but it installs itself as the 1450400675b20e36b976ec13b63e290e6d5d19bf654Shawn Willden// logger used by SoftKeymasterDevice. 1460400675b20e36b976ec13b63e290e6d5d19bf654Shawn Willdenstatic keymaster::SoftKeymasterLogger softkeymaster_logger; 1470400675b20e36b976ec13b63e290e6d5d19bf654Shawn Willden 14867d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubakerstatic int fallback_keymaster_device_initialize(keymaster1_device_t** dev) { 14967d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker keymaster::SoftKeymasterDevice* softkeymaster = 15067d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker new keymaster::SoftKeymasterDevice(); 1519fd05a9a6299e9688c8fcf755516ea254868d187Shawn Willden *dev = softkeymaster->keymaster_device(); 1529fd05a9a6299e9688c8fcf755516ea254868d187Shawn Willden // softkeymaster will be freed by *dev->close_device; don't delete here. 153fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker return 0; 154fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker} 155fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker 156bd07a239085228c25898bc6cdece8b1b8758df83Chad Brubakerstatic void keymaster_device_release(keymaster1_device_t* dev) { 157bd07a239085228c25898bc6cdece8b1b8758df83Chad Brubaker dev->common.close(&dev->common); 15870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root} 15970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 16007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root/*************** 16107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * PERMISSIONS * 16207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ***************/ 16307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 16407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root/* Here are the permissions, actions, users, and the main function. */ 16507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Roottypedef enum { 166e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker P_GET_STATE = 1 << 0, 1674e865753346fc6a075966972a7a98051818859dbRobin Lee P_GET = 1 << 1, 1684e865753346fc6a075966972a7a98051818859dbRobin Lee P_INSERT = 1 << 2, 1694e865753346fc6a075966972a7a98051818859dbRobin Lee P_DELETE = 1 << 3, 1704e865753346fc6a075966972a7a98051818859dbRobin Lee P_EXIST = 1 << 4, 171e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker P_LIST = 1 << 5, 1724e865753346fc6a075966972a7a98051818859dbRobin Lee P_RESET = 1 << 6, 1734e865753346fc6a075966972a7a98051818859dbRobin Lee P_PASSWORD = 1 << 7, 1744e865753346fc6a075966972a7a98051818859dbRobin Lee P_LOCK = 1 << 8, 1754e865753346fc6a075966972a7a98051818859dbRobin Lee P_UNLOCK = 1 << 9, 176e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker P_IS_EMPTY = 1 << 10, 1774e865753346fc6a075966972a7a98051818859dbRobin Lee P_SIGN = 1 << 11, 1784e865753346fc6a075966972a7a98051818859dbRobin Lee P_VERIFY = 1 << 12, 1794e865753346fc6a075966972a7a98051818859dbRobin Lee P_GRANT = 1 << 13, 1804e865753346fc6a075966972a7a98051818859dbRobin Lee P_DUPLICATE = 1 << 14, 1814e865753346fc6a075966972a7a98051818859dbRobin Lee P_CLEAR_UID = 1 << 15, 182e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker P_ADD_AUTH = 1 << 16, 183e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker P_USER_CHANGED = 1 << 17, 18407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root} perm_t; 18507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 18607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootstatic struct user_euid { 18707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root uid_t uid; 18807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root uid_t euid; 18907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root} user_euids[] = { 19007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root {AID_VPN, AID_SYSTEM}, 19107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root {AID_WIFI, AID_SYSTEM}, 19207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root {AID_ROOT, AID_SYSTEM}, 19307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root}; 19407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 195eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn/* perm_labels associcated with keystore_key SELinux class verbs. */ 196eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahnconst char *perm_labels[] = { 197e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker "get_state", 198eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "get", 199eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "insert", 200eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "delete", 201eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "exist", 202e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker "list", 203eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "reset", 204eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "password", 205eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "lock", 206eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "unlock", 207e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker "is_empty", 208eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "sign", 209eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "verify", 210eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "grant", 211eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "duplicate", 2124e865753346fc6a075966972a7a98051818859dbRobin Lee "clear_uid", 213d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker "add_auth", 214c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker "user_changed", 215eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn}; 216eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 21707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootstatic struct user_perm { 21807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root uid_t uid; 21907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root perm_t perms; 22007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root} user_perms[] = { 22107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root {AID_SYSTEM, static_cast<perm_t>((uint32_t)(~0)) }, 22207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root {AID_VPN, static_cast<perm_t>(P_GET | P_SIGN | P_VERIFY) }, 22307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root {AID_WIFI, static_cast<perm_t>(P_GET | P_SIGN | P_VERIFY) }, 22407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root {AID_ROOT, static_cast<perm_t>(P_GET) }, 22507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root}; 22607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 227e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubakerstatic const perm_t DEFAULT_PERMS = static_cast<perm_t>(P_GET_STATE | P_GET | P_INSERT | P_DELETE 228e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker | P_EXIST | P_LIST | P_SIGN | P_VERIFY); 22907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 230eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahnstatic char *tctx; 231eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahnstatic int ks_is_selinux_enabled; 232eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 233eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahnstatic const char *get_perm_label(perm_t perm) { 234eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn unsigned int index = ffs(perm); 235eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (index > 0 && index <= (sizeof(perm_labels) / sizeof(perm_labels[0]))) { 236eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn return perm_labels[index - 1]; 237eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } else { 238eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn ALOGE("Keystore: Failed to retrieve permission label.\n"); 239eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn abort(); 240eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } 241eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn} 242eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 243655b958eb2180c7c06889f83f606d23421bf038cKenny Root/** 244655b958eb2180c7c06889f83f606d23421bf038cKenny Root * Returns the app ID (in the Android multi-user sense) for the current 245655b958eb2180c7c06889f83f606d23421bf038cKenny Root * UNIX UID. 246655b958eb2180c7c06889f83f606d23421bf038cKenny Root */ 247655b958eb2180c7c06889f83f606d23421bf038cKenny Rootstatic uid_t get_app_id(uid_t uid) { 248655b958eb2180c7c06889f83f606d23421bf038cKenny Root return uid % AID_USER; 249655b958eb2180c7c06889f83f606d23421bf038cKenny Root} 250655b958eb2180c7c06889f83f606d23421bf038cKenny Root 251655b958eb2180c7c06889f83f606d23421bf038cKenny Root/** 252655b958eb2180c7c06889f83f606d23421bf038cKenny Root * Returns the user ID (in the Android multi-user sense) for the current 253655b958eb2180c7c06889f83f606d23421bf038cKenny Root * UNIX UID. 254655b958eb2180c7c06889f83f606d23421bf038cKenny Root */ 255655b958eb2180c7c06889f83f606d23421bf038cKenny Rootstatic uid_t get_user_id(uid_t uid) { 256655b958eb2180c7c06889f83f606d23421bf038cKenny Root return uid / AID_USER; 257655b958eb2180c7c06889f83f606d23421bf038cKenny Root} 258655b958eb2180c7c06889f83f606d23421bf038cKenny Root 259a25b2a397fff48dea7bce16af2065e6f5f043956Chih-Hung Hsiehstatic bool keystore_selinux_check_access(uid_t /*uid*/, perm_t perm, pid_t spid) { 260eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!ks_is_selinux_enabled) { 261eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn return true; 262eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } 263eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 264eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn char *sctx = NULL; 265eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn const char *selinux_class = "keystore_key"; 266eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn const char *str_perm = get_perm_label(perm); 267eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 268eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!str_perm) { 269eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn return false; 270eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } 271eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 272eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (getpidcon(spid, &sctx) != 0) { 273eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn ALOGE("SELinux: Failed to get source pid context.\n"); 274eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn return false; 275eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } 27666dbf67dd65b4808a15ef64f0ffde1275bdd58a9Nick Kralevich 277eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn bool allowed = selinux_check_access(sctx, tctx, selinux_class, str_perm, 278eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn NULL) == 0; 279eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn freecon(sctx); 280eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn return allowed; 281eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn} 282eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 283eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahnstatic bool has_permission(uid_t uid, perm_t perm, pid_t spid) { 284655b958eb2180c7c06889f83f606d23421bf038cKenny Root // All system users are equivalent for multi-user support. 285655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (get_app_id(uid) == AID_SYSTEM) { 286655b958eb2180c7c06889f83f606d23421bf038cKenny Root uid = AID_SYSTEM; 287655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 288655b958eb2180c7c06889f83f606d23421bf038cKenny Root 28907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root for (size_t i = 0; i < sizeof(user_perms)/sizeof(user_perms[0]); i++) { 29007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root struct user_perm user = user_perms[i]; 29107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (user.uid == uid) { 292eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn return (user.perms & perm) && 293eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn keystore_selinux_check_access(uid, perm, spid); 29407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 29507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 29607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 297eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn return (DEFAULT_PERMS & perm) && 298eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn keystore_selinux_check_access(uid, perm, spid); 29907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root} 30007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 301494689083467ec372a58f094f041c8f102f39393Kenny Root/** 302494689083467ec372a58f094f041c8f102f39393Kenny Root * Returns the UID that the callingUid should act as. This is here for 303494689083467ec372a58f094f041c8f102f39393Kenny Root * legacy support of the WiFi and VPN systems and should be removed 304494689083467ec372a58f094f041c8f102f39393Kenny Root * when WiFi can operate in its own namespace. 305494689083467ec372a58f094f041c8f102f39393Kenny Root */ 30607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootstatic uid_t get_keystore_euid(uid_t uid) { 30707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root for (size_t i = 0; i < sizeof(user_euids)/sizeof(user_euids[0]); i++) { 30807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root struct user_euid user = user_euids[i]; 30907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (user.uid == uid) { 31007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return user.euid; 31107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 31207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 31307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 31407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return uid; 31507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root} 31607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 317494689083467ec372a58f094f041c8f102f39393Kenny Root/** 318494689083467ec372a58f094f041c8f102f39393Kenny Root * Returns true if the callingUid is allowed to interact in the targetUid's 319494689083467ec372a58f094f041c8f102f39393Kenny Root * namespace. 320494689083467ec372a58f094f041c8f102f39393Kenny Root */ 321494689083467ec372a58f094f041c8f102f39393Kenny Rootstatic bool is_granted_to(uid_t callingUid, uid_t targetUid) { 3229489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (callingUid == targetUid) { 3239489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return true; 3249489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 325494689083467ec372a58f094f041c8f102f39393Kenny Root for (size_t i = 0; i < sizeof(user_euids)/sizeof(user_euids[0]); i++) { 326494689083467ec372a58f094f041c8f102f39393Kenny Root struct user_euid user = user_euids[i]; 327494689083467ec372a58f094f041c8f102f39393Kenny Root if (user.euid == callingUid && user.uid == targetUid) { 328494689083467ec372a58f094f041c8f102f39393Kenny Root return true; 329494689083467ec372a58f094f041c8f102f39393Kenny Root } 330494689083467ec372a58f094f041c8f102f39393Kenny Root } 331494689083467ec372a58f094f041c8f102f39393Kenny Root 332494689083467ec372a58f094f041c8f102f39393Kenny Root return false; 333494689083467ec372a58f094f041c8f102f39393Kenny Root} 334494689083467ec372a58f094f041c8f102f39393Kenny Root 335a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root/* Here is the encoding of keys. This is necessary in order to allow arbitrary 336a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * characters in keys. Characters in [0-~] are not encoded. Others are encoded 337a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * into two bytes. The first byte is one of [+-.] which represents the first 338a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * two bits of the character. The second byte encodes the rest of the bits into 339a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * [0-o]. Therefore in the worst case the length of a key gets doubled. Note 340a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * that Base64 cannot be used here due to the need of prefix match on keys. */ 341a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 342655b958eb2180c7c06889f83f606d23421bf038cKenny Rootstatic size_t encode_key_length(const android::String8& keyName) { 343655b958eb2180c7c06889f83f606d23421bf038cKenny Root const uint8_t* in = reinterpret_cast<const uint8_t*>(keyName.string()); 344655b958eb2180c7c06889f83f606d23421bf038cKenny Root size_t length = keyName.length(); 345655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (int i = length; i > 0; --i, ++in) { 346655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (*in < '0' || *in > '~') { 347655b958eb2180c7c06889f83f606d23421bf038cKenny Root ++length; 348655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 349655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 350655b958eb2180c7c06889f83f606d23421bf038cKenny Root return length; 351655b958eb2180c7c06889f83f606d23421bf038cKenny Root} 352655b958eb2180c7c06889f83f606d23421bf038cKenny Root 35307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootstatic int encode_key(char* out, const android::String8& keyName) { 35407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const uint8_t* in = reinterpret_cast<const uint8_t*>(keyName.string()); 35507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root size_t length = keyName.length(); 356a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root for (int i = length; i > 0; --i, ++in, ++out) { 357655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (*in < '0' || *in > '~') { 358a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root *out = '+' + (*in >> 6); 359a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root *++out = '0' + (*in & 0x3F); 360a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ++length; 361655b958eb2180c7c06889f83f606d23421bf038cKenny Root } else { 362655b958eb2180c7c06889f83f606d23421bf038cKenny Root *out = *in; 363a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 364a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 365a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root *out = '\0'; 36670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return length; 36770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root} 36870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 36907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root/* 37007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * Converts from the "escaped" format on disk to actual name. 37107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * This will be smaller than the input string. 37207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * 37307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * Characters that should combine with the next at the end will be truncated. 37407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root */ 37507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootstatic size_t decode_key_length(const char* in, size_t length) { 37607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root size_t outLength = 0; 37707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 37807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root for (const char* end = in + length; in < end; in++) { 37907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root /* This combines with the next character. */ 38007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (*in < '0' || *in > '~') { 38107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root continue; 38207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 38307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 38407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root outLength++; 38507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 38607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return outLength; 38707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root} 38807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 38907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootstatic void decode_key(char* out, const char* in, size_t length) { 39007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root for (const char* end = in + length; in < end; in++) { 39107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (*in < '0' || *in > '~') { 39207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root /* Truncate combining characters at the end. */ 39307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (in + 1 >= end) { 39407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root break; 39507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 39607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 39707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *out = (*in++ - '+') << 6; 39807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *out++ |= (*in - '0') & 0x3F; 399a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } else { 40007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *out++ = *in; 401a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 402a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 403a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root *out = '\0'; 404a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root} 405a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 406a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootstatic size_t readFully(int fd, uint8_t* data, size_t size) { 407a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t remaining = size; 408a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root while (remaining > 0) { 409150ca934edb745de3666a6492b039900df228ff0Kenny Root ssize_t n = TEMP_FAILURE_RETRY(read(fd, data, remaining)); 4105281edbc9445065479e92a6c86da462f3943c2caKenny Root if (n <= 0) { 411150ca934edb745de3666a6492b039900df228ff0Kenny Root return size - remaining; 412a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 413a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root data += n; 414a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root remaining -= n; 415a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 416a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return size; 417a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root} 418a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 419a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootstatic size_t writeFully(int fd, uint8_t* data, size_t size) { 420a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t remaining = size; 421a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root while (remaining > 0) { 422150ca934edb745de3666a6492b039900df228ff0Kenny Root ssize_t n = TEMP_FAILURE_RETRY(write(fd, data, remaining)); 423150ca934edb745de3666a6492b039900df228ff0Kenny Root if (n < 0) { 424150ca934edb745de3666a6492b039900df228ff0Kenny Root ALOGW("write failed: %s", strerror(errno)); 425150ca934edb745de3666a6492b039900df228ff0Kenny Root return size - remaining; 426a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 427a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root data += n; 428a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root remaining -= n; 429a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 430a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return size; 431a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root} 432a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 433a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootclass Entropy { 434a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootpublic: 435a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root Entropy() : mRandom(-1) {} 436a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ~Entropy() { 437150ca934edb745de3666a6492b039900df228ff0Kenny Root if (mRandom >= 0) { 438a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root close(mRandom); 439a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 440a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 441a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 442a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root bool open() { 443a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root const char* randomDevice = "/dev/urandom"; 444150ca934edb745de3666a6492b039900df228ff0Kenny Root mRandom = TEMP_FAILURE_RETRY(::open(randomDevice, O_RDONLY)); 445150ca934edb745de3666a6492b039900df228ff0Kenny Root if (mRandom < 0) { 446a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ALOGE("open: %s: %s", randomDevice, strerror(errno)); 447a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return false; 448a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 449a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return true; 450a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 451a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 4525187818895c4c5f650a611c40531b1dff7764c18Kenny Root bool generate_random_data(uint8_t* data, size_t size) const { 453a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return (readFully(mRandom, data, size) == size); 454a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 455a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 456a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootprivate: 457a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root int mRandom; 458a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root}; 459a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 460a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root/* Here is the file format. There are two parts in blob.value, the secret and 461a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * the description. The secret is stored in ciphertext, and its original size 462a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * can be found in blob.length. The description is stored after the secret in 463a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * plaintext, and its size is specified in blob.info. The total size of the two 464822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * parts must be no more than VALUE_SIZE bytes. The first field is the version, 465f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root * the second is the blob's type, and the third byte is flags. Fields other 466a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * than blob.info, blob.length, and blob.value are modified by encryptBlob() 467a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * and decryptBlob(). Thus they should not be accessed from outside. */ 468a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 469822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root/* ** Note to future implementors of encryption: ** 470822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Currently this is the construction: 471822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * metadata || Enc(MD5(data) || data) 472822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * 473822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * This should be the construction used for encrypting if re-implementing: 474822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * 475822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Derive independent keys for encryption and MAC: 476822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Kenc = AES_encrypt(masterKey, "Encrypt") 477822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Kmac = AES_encrypt(masterKey, "MAC") 478822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * 479822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Store this: 480822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * metadata || AES_CTR_encrypt(Kenc, rand_IV, data) || 481822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * HMAC(Kmac, metadata || Enc(data)) 482822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root */ 483a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootstruct __attribute__((packed)) blob { 484822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root uint8_t version; 485822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root uint8_t type; 486f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root uint8_t flags; 487a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root uint8_t info; 488a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root uint8_t vector[AES_BLOCK_SIZE]; 489822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root uint8_t encrypted[0]; // Marks offset to encrypted data. 490a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root uint8_t digest[MD5_DIGEST_LENGTH]; 491822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root uint8_t digested[0]; // Marks offset to digested data. 492a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root int32_t length; // in network byte order when encrypted 493a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root uint8_t value[VALUE_SIZE + AES_BLOCK_SIZE]; 494a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root}; 495a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 496822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Roottypedef enum { 497d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root TYPE_ANY = 0, // meta type that matches anything 498822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root TYPE_GENERIC = 1, 499822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root TYPE_MASTER_KEY = 2, 500822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root TYPE_KEY_PAIR = 3, 50117d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker TYPE_KEYMASTER_10 = 4, 502822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root} BlobType; 503822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 504f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Rootstatic const uint8_t CURRENT_BLOB_VERSION = 2; 505822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 506a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootclass Blob { 507a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootpublic: 50807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root Blob(const uint8_t* value, int32_t valueLength, const uint8_t* info, uint8_t infoLength, 50907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root BlobType type) { 5101773b442b16098c6d111d6371d4a986a0747992bAlex Klyubin memset(&mBlob, 0, sizeof(mBlob)); 511a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root mBlob.length = valueLength; 512a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root memcpy(mBlob.value, value, valueLength); 513a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 514a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root mBlob.info = infoLength; 515a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root memcpy(mBlob.value + valueLength, info, infoLength); 516822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 51707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root mBlob.version = CURRENT_BLOB_VERSION; 518822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root mBlob.type = uint8_t(type); 519f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 520ee8068b9e7bfb2770635062fc9c2035be2142bd8Kenny Root if (type == TYPE_MASTER_KEY) { 521ee8068b9e7bfb2770635062fc9c2035be2142bd8Kenny Root mBlob.flags = KEYSTORE_FLAG_ENCRYPTED; 522ee8068b9e7bfb2770635062fc9c2035be2142bd8Kenny Root } else { 523ee8068b9e7bfb2770635062fc9c2035be2142bd8Kenny Root mBlob.flags = KEYSTORE_FLAG_NONE; 524ee8068b9e7bfb2770635062fc9c2035be2142bd8Kenny Root } 525a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 526a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 527a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root Blob(blob b) { 528a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root mBlob = b; 529a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 530a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 5311773b442b16098c6d111d6371d4a986a0747992bAlex Klyubin Blob() { 5321773b442b16098c6d111d6371d4a986a0747992bAlex Klyubin memset(&mBlob, 0, sizeof(mBlob)); 5331773b442b16098c6d111d6371d4a986a0747992bAlex Klyubin } 534a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 5355187818895c4c5f650a611c40531b1dff7764c18Kenny Root const uint8_t* getValue() const { 536a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return mBlob.value; 537a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 538a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 5395187818895c4c5f650a611c40531b1dff7764c18Kenny Root int32_t getLength() const { 540a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return mBlob.length; 541a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 542a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 5435187818895c4c5f650a611c40531b1dff7764c18Kenny Root const uint8_t* getInfo() const { 5445187818895c4c5f650a611c40531b1dff7764c18Kenny Root return mBlob.value + mBlob.length; 5455187818895c4c5f650a611c40531b1dff7764c18Kenny Root } 5465187818895c4c5f650a611c40531b1dff7764c18Kenny Root 5475187818895c4c5f650a611c40531b1dff7764c18Kenny Root uint8_t getInfoLength() const { 548a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return mBlob.info; 549a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 550a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 551822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root uint8_t getVersion() const { 552822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return mBlob.version; 553822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 554822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 555f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root bool isEncrypted() const { 556f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (mBlob.version < 2) { 557f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return true; 558f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 559f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 560f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return mBlob.flags & KEYSTORE_FLAG_ENCRYPTED; 561f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 562f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 563f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root void setEncrypted(bool encrypted) { 564f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (encrypted) { 565f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root mBlob.flags |= KEYSTORE_FLAG_ENCRYPTED; 566f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } else { 567f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root mBlob.flags &= ~KEYSTORE_FLAG_ENCRYPTED; 568f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 569f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 570f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 57117208e0de5a42722901d803118745cca25fd10c1Kenny Root bool isFallback() const { 57217208e0de5a42722901d803118745cca25fd10c1Kenny Root return mBlob.flags & KEYSTORE_FLAG_FALLBACK; 57317208e0de5a42722901d803118745cca25fd10c1Kenny Root } 57417208e0de5a42722901d803118745cca25fd10c1Kenny Root 57517208e0de5a42722901d803118745cca25fd10c1Kenny Root void setFallback(bool fallback) { 57617208e0de5a42722901d803118745cca25fd10c1Kenny Root if (fallback) { 57717208e0de5a42722901d803118745cca25fd10c1Kenny Root mBlob.flags |= KEYSTORE_FLAG_FALLBACK; 57817208e0de5a42722901d803118745cca25fd10c1Kenny Root } else { 57917208e0de5a42722901d803118745cca25fd10c1Kenny Root mBlob.flags &= ~KEYSTORE_FLAG_FALLBACK; 58017208e0de5a42722901d803118745cca25fd10c1Kenny Root } 58117208e0de5a42722901d803118745cca25fd10c1Kenny Root } 58217208e0de5a42722901d803118745cca25fd10c1Kenny Root 583822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root void setVersion(uint8_t version) { 584822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root mBlob.version = version; 585822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 586822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 587822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root BlobType getType() const { 588822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return BlobType(mBlob.type); 589822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 590822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 591822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root void setType(BlobType type) { 592822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root mBlob.type = uint8_t(type); 593822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 594822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 595f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ResponseCode writeBlob(const char* filename, AES_KEY *aes_key, State state, Entropy* entropy) { 596f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ALOGV("writing blob %s", filename); 597f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (isEncrypted()) { 598f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (state != STATE_NO_ERROR) { 599f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ALOGD("couldn't insert encrypted blob while not unlocked"); 600f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return LOCKED; 601f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 602f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 603f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (!entropy->generate_random_data(mBlob.vector, AES_BLOCK_SIZE)) { 604f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ALOGW("Could not read random data for: %s", filename); 605f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return SYSTEM_ERROR; 606f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 607a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 608a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 609a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // data includes the value and the value's length 610a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t dataLength = mBlob.length + sizeof(mBlob.length); 611a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // pad data to the AES_BLOCK_SIZE 612a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t digestedLength = ((dataLength + AES_BLOCK_SIZE - 1) 613a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root / AES_BLOCK_SIZE * AES_BLOCK_SIZE); 614a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // encrypted data includes the digest value 615a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t encryptedLength = digestedLength + MD5_DIGEST_LENGTH; 616a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // move info after space for padding 617a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root memmove(&mBlob.encrypted[encryptedLength], &mBlob.value[mBlob.length], mBlob.info); 618a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // zero padding area 619a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root memset(mBlob.value + mBlob.length, 0, digestedLength - dataLength); 620a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 621a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root mBlob.length = htonl(mBlob.length); 622a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 623f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (isEncrypted()) { 624f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root MD5(mBlob.digested, digestedLength, mBlob.digest); 625f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 626f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root uint8_t vector[AES_BLOCK_SIZE]; 627f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root memcpy(vector, mBlob.vector, AES_BLOCK_SIZE); 628f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root AES_cbc_encrypt(mBlob.encrypted, mBlob.encrypted, encryptedLength, 629f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root aes_key, vector, AES_ENCRYPT); 630f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 631a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 632a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t headerLength = (mBlob.encrypted - (uint8_t*) &mBlob); 633a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t fileLength = encryptedLength + headerLength + mBlob.info; 634a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 635a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root const char* tmpFileName = ".tmp"; 636150ca934edb745de3666a6492b039900df228ff0Kenny Root int out = TEMP_FAILURE_RETRY(open(tmpFileName, 637150ca934edb745de3666a6492b039900df228ff0Kenny Root O_WRONLY | O_TRUNC | O_CREAT, S_IRUSR | S_IWUSR)); 638150ca934edb745de3666a6492b039900df228ff0Kenny Root if (out < 0) { 639150ca934edb745de3666a6492b039900df228ff0Kenny Root ALOGW("could not open file: %s: %s", tmpFileName, strerror(errno)); 640a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 641a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 642a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t writtenBytes = writeFully(out, (uint8_t*) &mBlob, fileLength); 643a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (close(out) != 0) { 644a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 645a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 646a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (writtenBytes != fileLength) { 647150ca934edb745de3666a6492b039900df228ff0Kenny Root ALOGW("blob not fully written %zu != %zu", writtenBytes, fileLength); 648a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root unlink(tmpFileName); 649a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 650a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 651150ca934edb745de3666a6492b039900df228ff0Kenny Root if (rename(tmpFileName, filename) == -1) { 652150ca934edb745de3666a6492b039900df228ff0Kenny Root ALOGW("could not rename blob to %s: %s", filename, strerror(errno)); 653150ca934edb745de3666a6492b039900df228ff0Kenny Root return SYSTEM_ERROR; 654150ca934edb745de3666a6492b039900df228ff0Kenny Root } 655150ca934edb745de3666a6492b039900df228ff0Kenny Root return NO_ERROR; 656a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 657a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 658f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ResponseCode readBlob(const char* filename, AES_KEY *aes_key, State state) { 659f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ALOGV("reading blob %s", filename); 660150ca934edb745de3666a6492b039900df228ff0Kenny Root int in = TEMP_FAILURE_RETRY(open(filename, O_RDONLY)); 661150ca934edb745de3666a6492b039900df228ff0Kenny Root if (in < 0) { 662a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return (errno == ENOENT) ? KEY_NOT_FOUND : SYSTEM_ERROR; 663a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 664a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // fileLength may be less than sizeof(mBlob) since the in 665a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // memory version has extra padding to tolerate rounding up to 666a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // the AES_BLOCK_SIZE 667a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t fileLength = readFully(in, (uint8_t*) &mBlob, sizeof(mBlob)); 668a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (close(in) != 0) { 669a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 670a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 671f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 672a9a17eeca2f5d9d3101a7e0bb136360697b6e2f0Chad Brubaker if (fileLength == 0) { 673a9a17eeca2f5d9d3101a7e0bb136360697b6e2f0Chad Brubaker return VALUE_CORRUPTED; 674a9a17eeca2f5d9d3101a7e0bb136360697b6e2f0Chad Brubaker } 675a9a17eeca2f5d9d3101a7e0bb136360697b6e2f0Chad Brubaker 676f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (isEncrypted() && (state != STATE_NO_ERROR)) { 677f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return LOCKED; 678f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 679f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 680a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t headerLength = (mBlob.encrypted - (uint8_t*) &mBlob); 681a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (fileLength < headerLength) { 682a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return VALUE_CORRUPTED; 683a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 684a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 685a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ssize_t encryptedLength = fileLength - (headerLength + mBlob.info); 686f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (encryptedLength < 0) { 687a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return VALUE_CORRUPTED; 688a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 689f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 690f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ssize_t digestedLength; 691f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (isEncrypted()) { 692f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (encryptedLength % AES_BLOCK_SIZE != 0) { 693f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return VALUE_CORRUPTED; 694f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 695f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 696f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root AES_cbc_encrypt(mBlob.encrypted, mBlob.encrypted, encryptedLength, aes_key, 697f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root mBlob.vector, AES_DECRYPT); 698f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root digestedLength = encryptedLength - MD5_DIGEST_LENGTH; 699f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root uint8_t computedDigest[MD5_DIGEST_LENGTH]; 700f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root MD5(mBlob.digested, digestedLength, computedDigest); 701f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (memcmp(mBlob.digest, computedDigest, MD5_DIGEST_LENGTH) != 0) { 702f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return VALUE_CORRUPTED; 703f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 704f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } else { 705f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root digestedLength = encryptedLength; 706a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 707a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 708a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ssize_t maxValueLength = digestedLength - sizeof(mBlob.length); 709a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root mBlob.length = ntohl(mBlob.length); 710a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (mBlob.length < 0 || mBlob.length > maxValueLength) { 711a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return VALUE_CORRUPTED; 712a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 713a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (mBlob.info != 0) { 714a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // move info from after padding to after data 715a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root memmove(&mBlob.value[mBlob.length], &mBlob.value[maxValueLength], mBlob.info); 716a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 71707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 718a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 719a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 720a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootprivate: 721a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root struct blob mBlob; 722a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root}; 723a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 724655b958eb2180c7c06889f83f606d23421bf038cKenny Rootclass UserState { 725655b958eb2180c7c06889f83f606d23421bf038cKenny Rootpublic: 726655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState(uid_t userId) : mUserId(userId), mRetry(MAX_RETRY) { 727655b958eb2180c7c06889f83f606d23421bf038cKenny Root asprintf(&mUserDir, "user_%u", mUserId); 728655b958eb2180c7c06889f83f606d23421bf038cKenny Root asprintf(&mMasterKeyFile, "%s/.masterkey", mUserDir); 729655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 73070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 731655b958eb2180c7c06889f83f606d23421bf038cKenny Root ~UserState() { 732655b958eb2180c7c06889f83f606d23421bf038cKenny Root free(mUserDir); 733655b958eb2180c7c06889f83f606d23421bf038cKenny Root free(mMasterKeyFile); 734655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 73570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 736655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool initialize() { 737655b958eb2180c7c06889f83f606d23421bf038cKenny Root if ((mkdir(mUserDir, S_IRUSR | S_IWUSR | S_IXUSR) < 0) && (errno != EEXIST)) { 738655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGE("Could not create directory '%s'", mUserDir); 739655b958eb2180c7c06889f83f606d23421bf038cKenny Root return false; 740655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 741655b958eb2180c7c06889f83f606d23421bf038cKenny Root 742655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(mMasterKeyFile, R_OK) == 0) { 743a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root setState(STATE_LOCKED); 744a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } else { 745a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root setState(STATE_UNINITIALIZED); 746a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 74770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 748655b958eb2180c7c06889f83f606d23421bf038cKenny Root return true; 749655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 750655b958eb2180c7c06889f83f606d23421bf038cKenny Root 751655b958eb2180c7c06889f83f606d23421bf038cKenny Root uid_t getUserId() const { 752655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mUserId; 753655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 754655b958eb2180c7c06889f83f606d23421bf038cKenny Root 755655b958eb2180c7c06889f83f606d23421bf038cKenny Root const char* getUserDirName() const { 756655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mUserDir; 757655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 758655b958eb2180c7c06889f83f606d23421bf038cKenny Root 759655b958eb2180c7c06889f83f606d23421bf038cKenny Root const char* getMasterKeyFileName() const { 760655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mMasterKeyFile; 761655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 762655b958eb2180c7c06889f83f606d23421bf038cKenny Root 763655b958eb2180c7c06889f83f606d23421bf038cKenny Root void setState(State state) { 764655b958eb2180c7c06889f83f606d23421bf038cKenny Root mState = state; 765655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (mState == STATE_NO_ERROR || mState == STATE_UNINITIALIZED) { 766655b958eb2180c7c06889f83f606d23421bf038cKenny Root mRetry = MAX_RETRY; 767655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 768a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 769a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 7705187818895c4c5f650a611c40531b1dff7764c18Kenny Root State getState() const { 771a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return mState; 772a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 773a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 7745187818895c4c5f650a611c40531b1dff7764c18Kenny Root int8_t getRetry() const { 775a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return mRetry; 776a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 777a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 778655b958eb2180c7c06889f83f606d23421bf038cKenny Root void zeroizeMasterKeysInMemory() { 779655b958eb2180c7c06889f83f606d23421bf038cKenny Root memset(mMasterKey, 0, sizeof(mMasterKey)); 780655b958eb2180c7c06889f83f606d23421bf038cKenny Root memset(mSalt, 0, sizeof(mSalt)); 781655b958eb2180c7c06889f83f606d23421bf038cKenny Root memset(&mMasterKeyEncryption, 0, sizeof(mMasterKeyEncryption)); 782655b958eb2180c7c06889f83f606d23421bf038cKenny Root memset(&mMasterKeyDecryption, 0, sizeof(mMasterKeyDecryption)); 78370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 78470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 78596d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker bool deleteMasterKey() { 78696d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker setState(STATE_UNINITIALIZED); 78796d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker zeroizeMasterKeysInMemory(); 78896d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker return unlink(mMasterKeyFile) == 0 || errno == ENOENT; 78996d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 79096d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker 791655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode initialize(const android::String8& pw, Entropy* entropy) { 792655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!generateMasterKey(entropy)) { 793a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 794a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 795655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode response = writeMasterKey(pw, entropy); 796a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (response != NO_ERROR) { 797a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return response; 798a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 799a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root setupMasterKeys(); 80007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 801a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 802a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 8034e865753346fc6a075966972a7a98051818859dbRobin Lee ResponseCode copyMasterKey(UserState* src) { 8044e865753346fc6a075966972a7a98051818859dbRobin Lee if (mState != STATE_UNINITIALIZED) { 8054e865753346fc6a075966972a7a98051818859dbRobin Lee return ::SYSTEM_ERROR; 8064e865753346fc6a075966972a7a98051818859dbRobin Lee } 8074e865753346fc6a075966972a7a98051818859dbRobin Lee if (src->getState() != STATE_NO_ERROR) { 8084e865753346fc6a075966972a7a98051818859dbRobin Lee return ::SYSTEM_ERROR; 8094e865753346fc6a075966972a7a98051818859dbRobin Lee } 8104e865753346fc6a075966972a7a98051818859dbRobin Lee memcpy(mMasterKey, src->mMasterKey, MASTER_KEY_SIZE_BYTES); 8114e865753346fc6a075966972a7a98051818859dbRobin Lee setupMasterKeys(); 8124e865753346fc6a075966972a7a98051818859dbRobin Lee return ::NO_ERROR; 8134e865753346fc6a075966972a7a98051818859dbRobin Lee } 8144e865753346fc6a075966972a7a98051818859dbRobin Lee 815655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode writeMasterKey(const android::String8& pw, Entropy* entropy) { 816a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root uint8_t passwordKey[MASTER_KEY_SIZE_BYTES]; 817a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root generateKeyFromPassword(passwordKey, MASTER_KEY_SIZE_BYTES, pw, mSalt); 818a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root AES_KEY passwordAesKey; 819a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root AES_set_encrypt_key(passwordKey, MASTER_KEY_SIZE_BITS, &passwordAesKey); 820822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root Blob masterKeyBlob(mMasterKey, sizeof(mMasterKey), mSalt, sizeof(mSalt), TYPE_MASTER_KEY); 821f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return masterKeyBlob.writeBlob(mMasterKeyFile, &passwordAesKey, STATE_NO_ERROR, entropy); 822a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 823a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 824655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode readMasterKey(const android::String8& pw, Entropy* entropy) { 825655b958eb2180c7c06889f83f606d23421bf038cKenny Root int in = TEMP_FAILURE_RETRY(open(mMasterKeyFile, O_RDONLY)); 826150ca934edb745de3666a6492b039900df228ff0Kenny Root if (in < 0) { 827a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 828a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 829a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 830a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // we read the raw blob to just to get the salt to generate 831a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // the AES key, then we create the Blob to use with decryptBlob 832a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root blob rawBlob; 833a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t length = readFully(in, (uint8_t*) &rawBlob, sizeof(rawBlob)); 834a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (close(in) != 0) { 835a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 836a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 837a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // find salt at EOF if present, otherwise we have an old file 838a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root uint8_t* salt; 839a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (length > SALT_SIZE && rawBlob.info == SALT_SIZE) { 840a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root salt = (uint8_t*) &rawBlob + length - SALT_SIZE; 841a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } else { 842a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root salt = NULL; 843a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 844a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root uint8_t passwordKey[MASTER_KEY_SIZE_BYTES]; 845a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root generateKeyFromPassword(passwordKey, MASTER_KEY_SIZE_BYTES, pw, salt); 846a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root AES_KEY passwordAesKey; 847a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root AES_set_decrypt_key(passwordKey, MASTER_KEY_SIZE_BITS, &passwordAesKey); 848a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root Blob masterKeyBlob(rawBlob); 849f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ResponseCode response = masterKeyBlob.readBlob(mMasterKeyFile, &passwordAesKey, 850f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root STATE_NO_ERROR); 851a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (response == SYSTEM_ERROR) { 852f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return response; 853a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 854a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (response == NO_ERROR && masterKeyBlob.getLength() == MASTER_KEY_SIZE_BYTES) { 855a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // if salt was missing, generate one and write a new master key file with the salt. 856a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (salt == NULL) { 857655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!generateSalt(entropy)) { 858a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 859a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 860655b958eb2180c7c06889f83f606d23421bf038cKenny Root response = writeMasterKey(pw, entropy); 861a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 862a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (response == NO_ERROR) { 863a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root memcpy(mMasterKey, masterKeyBlob.getValue(), MASTER_KEY_SIZE_BYTES); 864a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root setupMasterKeys(); 865a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 866a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return response; 867a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 868a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (mRetry <= 0) { 869a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root reset(); 870a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return UNINITIALIZED; 871a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 872a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root --mRetry; 873a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root switch (mRetry) { 874a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root case 0: return WRONG_PASSWORD_0; 875a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root case 1: return WRONG_PASSWORD_1; 876a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root case 2: return WRONG_PASSWORD_2; 877a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root case 3: return WRONG_PASSWORD_3; 878a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root default: return WRONG_PASSWORD_3; 879a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 880a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 881a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 882655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_KEY* getEncryptionKey() { 883655b958eb2180c7c06889f83f606d23421bf038cKenny Root return &mMasterKeyEncryption; 884655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 885a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 886655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_KEY* getDecryptionKey() { 887655b958eb2180c7c06889f83f606d23421bf038cKenny Root return &mMasterKeyDecryption; 888655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 889a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 890655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool reset() { 891655b958eb2180c7c06889f83f606d23421bf038cKenny Root DIR* dir = opendir(getUserDirName()); 892a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (!dir) { 89396d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker // If the directory doesn't exist then nothing to do. 89496d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if (errno == ENOENT) { 89596d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker return true; 89696d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 897655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("couldn't open user directory: %s", strerror(errno)); 898a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return false; 899a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 900655b958eb2180c7c06889f83f606d23421bf038cKenny Root 901655b958eb2180c7c06889f83f606d23421bf038cKenny Root struct dirent* file; 902a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root while ((file = readdir(dir)) != NULL) { 90396d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker // skip . and .. 90496d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if (!strcmp(".", file->d_name) || !strcmp("..", file->d_name)) { 905655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 906655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 907655b958eb2180c7c06889f83f606d23421bf038cKenny Root 908655b958eb2180c7c06889f83f606d23421bf038cKenny Root unlinkat(dirfd(dir), file->d_name, 0); 909a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 910a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root closedir(dir); 911a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return true; 912a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 913a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 914655b958eb2180c7c06889f83f606d23421bf038cKenny Rootprivate: 915655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const int MASTER_KEY_SIZE_BYTES = 16; 916655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const int MASTER_KEY_SIZE_BITS = MASTER_KEY_SIZE_BYTES * 8; 917655b958eb2180c7c06889f83f606d23421bf038cKenny Root 918655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const int MAX_RETRY = 4; 919655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const size_t SALT_SIZE = 16; 920655b958eb2180c7c06889f83f606d23421bf038cKenny Root 921655b958eb2180c7c06889f83f606d23421bf038cKenny Root void generateKeyFromPassword(uint8_t* key, ssize_t keySize, const android::String8& pw, 922655b958eb2180c7c06889f83f606d23421bf038cKenny Root uint8_t* salt) { 923655b958eb2180c7c06889f83f606d23421bf038cKenny Root size_t saltSize; 924655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (salt != NULL) { 925655b958eb2180c7c06889f83f606d23421bf038cKenny Root saltSize = SALT_SIZE; 926655b958eb2180c7c06889f83f606d23421bf038cKenny Root } else { 927655b958eb2180c7c06889f83f606d23421bf038cKenny Root // pre-gingerbread used this hardwired salt, readMasterKey will rewrite these when found 928655b958eb2180c7c06889f83f606d23421bf038cKenny Root salt = (uint8_t*) "keystore"; 929655b958eb2180c7c06889f83f606d23421bf038cKenny Root // sizeof = 9, not strlen = 8 930655b958eb2180c7c06889f83f606d23421bf038cKenny Root saltSize = sizeof("keystore"); 931655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 932655b958eb2180c7c06889f83f606d23421bf038cKenny Root 933655b958eb2180c7c06889f83f606d23421bf038cKenny Root PKCS5_PBKDF2_HMAC_SHA1(reinterpret_cast<const char*>(pw.string()), pw.length(), salt, 934655b958eb2180c7c06889f83f606d23421bf038cKenny Root saltSize, 8192, keySize, key); 935655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 936655b958eb2180c7c06889f83f606d23421bf038cKenny Root 937655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool generateSalt(Entropy* entropy) { 938655b958eb2180c7c06889f83f606d23421bf038cKenny Root return entropy->generate_random_data(mSalt, sizeof(mSalt)); 939655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 940655b958eb2180c7c06889f83f606d23421bf038cKenny Root 941655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool generateMasterKey(Entropy* entropy) { 942655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!entropy->generate_random_data(mMasterKey, sizeof(mMasterKey))) { 943655b958eb2180c7c06889f83f606d23421bf038cKenny Root return false; 944655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 945655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!generateSalt(entropy)) { 946655b958eb2180c7c06889f83f606d23421bf038cKenny Root return false; 947655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 948655b958eb2180c7c06889f83f606d23421bf038cKenny Root return true; 949655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 950655b958eb2180c7c06889f83f606d23421bf038cKenny Root 951655b958eb2180c7c06889f83f606d23421bf038cKenny Root void setupMasterKeys() { 952655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_set_encrypt_key(mMasterKey, MASTER_KEY_SIZE_BITS, &mMasterKeyEncryption); 953655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_set_decrypt_key(mMasterKey, MASTER_KEY_SIZE_BITS, &mMasterKeyDecryption); 954655b958eb2180c7c06889f83f606d23421bf038cKenny Root setState(STATE_NO_ERROR); 955655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 956655b958eb2180c7c06889f83f606d23421bf038cKenny Root 957655b958eb2180c7c06889f83f606d23421bf038cKenny Root uid_t mUserId; 958655b958eb2180c7c06889f83f606d23421bf038cKenny Root 959655b958eb2180c7c06889f83f606d23421bf038cKenny Root char* mUserDir; 960655b958eb2180c7c06889f83f606d23421bf038cKenny Root char* mMasterKeyFile; 961655b958eb2180c7c06889f83f606d23421bf038cKenny Root 962655b958eb2180c7c06889f83f606d23421bf038cKenny Root State mState; 963655b958eb2180c7c06889f83f606d23421bf038cKenny Root int8_t mRetry; 964655b958eb2180c7c06889f83f606d23421bf038cKenny Root 965655b958eb2180c7c06889f83f606d23421bf038cKenny Root uint8_t mMasterKey[MASTER_KEY_SIZE_BYTES]; 966655b958eb2180c7c06889f83f606d23421bf038cKenny Root uint8_t mSalt[SALT_SIZE]; 967655b958eb2180c7c06889f83f606d23421bf038cKenny Root 968655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_KEY mMasterKeyEncryption; 969655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_KEY mMasterKeyDecryption; 970655b958eb2180c7c06889f83f606d23421bf038cKenny Root}; 971655b958eb2180c7c06889f83f606d23421bf038cKenny Root 972655b958eb2180c7c06889f83f606d23421bf038cKenny Roottypedef struct { 973655b958eb2180c7c06889f83f606d23421bf038cKenny Root uint32_t uid; 974655b958eb2180c7c06889f83f606d23421bf038cKenny Root const uint8_t* filename; 975655b958eb2180c7c06889f83f606d23421bf038cKenny Root} grant_t; 976655b958eb2180c7c06889f83f606d23421bf038cKenny Root 977655b958eb2180c7c06889f83f606d23421bf038cKenny Rootclass KeyStore { 978655b958eb2180c7c06889f83f606d23421bf038cKenny Rootpublic: 97967d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker KeyStore(Entropy* entropy, keymaster1_device_t* device, keymaster1_device_t* fallback) 980655b958eb2180c7c06889f83f606d23421bf038cKenny Root : mEntropy(entropy) 981655b958eb2180c7c06889f83f606d23421bf038cKenny Root , mDevice(device) 982fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker , mFallbackDevice(fallback) 983655b958eb2180c7c06889f83f606d23421bf038cKenny Root { 984655b958eb2180c7c06889f83f606d23421bf038cKenny Root memset(&mMetaData, '\0', sizeof(mMetaData)); 985655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 986655b958eb2180c7c06889f83f606d23421bf038cKenny Root 987655b958eb2180c7c06889f83f606d23421bf038cKenny Root ~KeyStore() { 988655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<grant_t*>::iterator it(mGrants.begin()); 989655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mGrants.end(); it++) { 990655b958eb2180c7c06889f83f606d23421bf038cKenny Root delete *it; 991655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 992c35d4eb3e66aa69ca17dd83b1bcdcc19276bf8e5haitao fang mGrants.clear(); 993655b958eb2180c7c06889f83f606d23421bf038cKenny Root 994655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<UserState*>::iterator it(mMasterKeys.begin()); 995655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mMasterKeys.end(); it++) { 996655b958eb2180c7c06889f83f606d23421bf038cKenny Root delete *it; 997655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 998c35d4eb3e66aa69ca17dd83b1bcdcc19276bf8e5haitao fang mMasterKeys.clear(); 999655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1000655b958eb2180c7c06889f83f606d23421bf038cKenny Root 100167d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker /** 100267d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker * Depending on the hardware keymaster version is this may return a 100367d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker * keymaster0_device_t* cast to a keymaster1_device_t*. All methods from 100467d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker * keymaster0 are safe to call, calls to keymaster1_device_t methods should 100567d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker * be guarded by a check on the device's version. 100667d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker */ 100767d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker keymaster1_device_t *getDevice() const { 1008655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mDevice; 1009655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1010655b958eb2180c7c06889f83f606d23421bf038cKenny Root 101167d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker keymaster1_device_t *getFallbackDevice() const { 1012fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker return mFallbackDevice; 1013fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker } 1014fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker 101567d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker keymaster1_device_t *getDeviceForBlob(const Blob& blob) const { 1016fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker return blob.isFallback() ? mFallbackDevice: mDevice; 1017fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker } 1018fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker 1019655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode initialize() { 1020655b958eb2180c7c06889f83f606d23421bf038cKenny Root readMetaData(); 1021655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (upgradeKeystore()) { 1022655b958eb2180c7c06889f83f606d23421bf038cKenny Root writeMetaData(); 1023655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1024655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1025655b958eb2180c7c06889f83f606d23421bf038cKenny Root return ::NO_ERROR; 1026655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1027655b958eb2180c7c06889f83f606d23421bf038cKenny Root 102872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker State getState(uid_t userId) { 102972593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return getUserState(userId)->getState(); 1030655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1031655b958eb2180c7c06889f83f606d23421bf038cKenny Root 103272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode initializeUser(const android::String8& pw, uid_t userId) { 103372593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserState(userId); 1034655b958eb2180c7c06889f83f606d23421bf038cKenny Root return userState->initialize(pw, mEntropy); 1035655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1036655b958eb2180c7c06889f83f606d23421bf038cKenny Root 103772593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode copyMasterKey(uid_t srcUser, uid_t dstUser) { 103872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState *userState = getUserState(dstUser); 103972593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState *initState = getUserState(srcUser); 10404e865753346fc6a075966972a7a98051818859dbRobin Lee return userState->copyMasterKey(initState); 10414e865753346fc6a075966972a7a98051818859dbRobin Lee } 10424e865753346fc6a075966972a7a98051818859dbRobin Lee 104372593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode writeMasterKey(const android::String8& pw, uid_t userId) { 104472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserState(userId); 1045655b958eb2180c7c06889f83f606d23421bf038cKenny Root return userState->writeMasterKey(pw, mEntropy); 1046655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1047655b958eb2180c7c06889f83f606d23421bf038cKenny Root 104872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode readMasterKey(const android::String8& pw, uid_t userId) { 104972593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserState(userId); 1050655b958eb2180c7c06889f83f606d23421bf038cKenny Root return userState->readMasterKey(pw, mEntropy); 1051655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1052655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1053655b958eb2180c7c06889f83f606d23421bf038cKenny Root android::String8 getKeyName(const android::String8& keyName) { 1054a77e809ecff5190790906fb7a3c527259c735071Douglas Leung char encoded[encode_key_length(keyName) + 1]; // add 1 for null char 1055655b958eb2180c7c06889f83f606d23421bf038cKenny Root encode_key(encoded, keyName); 1056655b958eb2180c7c06889f83f606d23421bf038cKenny Root return android::String8(encoded); 1057655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1058655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1059655b958eb2180c7c06889f83f606d23421bf038cKenny Root android::String8 getKeyNameForUid(const android::String8& keyName, uid_t uid) { 1060a77e809ecff5190790906fb7a3c527259c735071Douglas Leung char encoded[encode_key_length(keyName) + 1]; // add 1 for null char 1061655b958eb2180c7c06889f83f606d23421bf038cKenny Root encode_key(encoded, keyName); 1062655b958eb2180c7c06889f83f606d23421bf038cKenny Root return android::String8::format("%u_%s", uid, encoded); 1063655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1064655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1065655b958eb2180c7c06889f83f606d23421bf038cKenny Root android::String8 getKeyNameForUidWithDir(const android::String8& keyName, uid_t uid) { 1066a77e809ecff5190790906fb7a3c527259c735071Douglas Leung char encoded[encode_key_length(keyName) + 1]; // add 1 for null char 1067655b958eb2180c7c06889f83f606d23421bf038cKenny Root encode_key(encoded, keyName); 106872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return android::String8::format("%s/%u_%s", getUserStateByUid(uid)->getUserDirName(), uid, 1069655b958eb2180c7c06889f83f606d23421bf038cKenny Root encoded); 1070655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1071655b958eb2180c7c06889f83f606d23421bf038cKenny Root 107296d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker /* 107396d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker * Delete entries owned by userId. If keepUnencryptedEntries is true 107496d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker * then only encrypted entries will be removed, otherwise all entries will 107596d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker * be removed. 107696d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker */ 107796d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker void resetUser(uid_t userId, bool keepUnenryptedEntries) { 10784b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee android::String8 prefix(""); 10794b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee android::Vector<android::String16> aliases; 108072593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserState(userId); 1081e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker if (list(prefix, &aliases, userId) != ::NO_ERROR) { 108296d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker return; 10834b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 10844b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee for (uint32_t i = 0; i < aliases.size(); i++) { 10854b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee android::String8 filename(aliases[i]); 10864b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee filename = android::String8::format("%s/%s", userState->getUserDirName(), 108796d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker getKeyName(filename).string()); 108896d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker bool shouldDelete = true; 108996d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if (keepUnenryptedEntries) { 109096d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker Blob blob; 109172593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode rc = get(filename, &blob, ::TYPE_ANY, userId); 109296d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker 109396d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker /* get can fail if the blob is encrypted and the state is 109496d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker * not unlocked, only skip deleting blobs that were loaded and 109596d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker * who are not encrypted. If there are blobs we fail to read for 109696d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker * other reasons err on the safe side and delete them since we 109796d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker * can't tell if they're encrypted. 109896d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker */ 109996d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker shouldDelete = !(rc == ::NO_ERROR && !blob.isEncrypted()); 110096d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 110196d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if (shouldDelete) { 110272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker del(filename, ::TYPE_ANY, userId); 110396d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 110496d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 110596d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if (!userState->deleteMasterKey()) { 110696d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker ALOGE("Failed to delete user %d's master key", userId); 110796d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 110896d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if (!keepUnenryptedEntries) { 110996d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if(!userState->reset()) { 111096d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker ALOGE("Failed to remove user %d's directory", userId); 111196d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 11124b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 1113655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1114655b958eb2180c7c06889f83f606d23421bf038cKenny Root 111572593ee807e89239d98ae08d32c733ecc08203baChad Brubaker bool isEmpty(uid_t userId) const { 111672593ee807e89239d98ae08d32c733ecc08203baChad Brubaker const UserState* userState = getUserState(userId); 111796d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if (userState == NULL) { 1118655b958eb2180c7c06889f83f606d23421bf038cKenny Root return true; 1119655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1120655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1121655b958eb2180c7c06889f83f606d23421bf038cKenny Root DIR* dir = opendir(userState->getUserDirName()); 1122a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (!dir) { 1123a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return true; 1124a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1125655b958eb2180c7c06889f83f606d23421bf038cKenny Root 112631e27468b6d822adbd2aec9219a68c206aa6957cKenny Root bool result = true; 112731e27468b6d822adbd2aec9219a68c206aa6957cKenny Root struct dirent* file; 1128a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root while ((file = readdir(dir)) != NULL) { 1129655b958eb2180c7c06889f83f606d23421bf038cKenny Root // We only care about files. 1130655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (file->d_type != DT_REG) { 1131655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1132655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1133655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1134655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Skip anything that starts with a "." 1135655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (file->d_name[0] == '.') { 1136655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1137655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1138655b958eb2180c7c06889f83f606d23421bf038cKenny Root 113931e27468b6d822adbd2aec9219a68c206aa6957cKenny Root result = false; 114031e27468b6d822adbd2aec9219a68c206aa6957cKenny Root break; 1141a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1142a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root closedir(dir); 1143a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return result; 1144a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1145a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 114672593ee807e89239d98ae08d32c733ecc08203baChad Brubaker void lock(uid_t userId) { 114772593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserState(userId); 1148655b958eb2180c7c06889f83f606d23421bf038cKenny Root userState->zeroizeMasterKeysInMemory(); 1149655b958eb2180c7c06889f83f606d23421bf038cKenny Root userState->setState(STATE_LOCKED); 1150a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1151a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 115272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode get(const char* filename, Blob* keyBlob, const BlobType type, uid_t userId) { 115372593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserState(userId); 1154f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ResponseCode rc = keyBlob->readBlob(filename, userState->getDecryptionKey(), 1155f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root userState->getState()); 1156822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (rc != NO_ERROR) { 1157822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return rc; 1158822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1159822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1160822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root const uint8_t version = keyBlob->getVersion(); 116107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (version < CURRENT_BLOB_VERSION) { 1162cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root /* If we upgrade the key, we need to write it to disk again. Then 1163cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root * it must be read it again since the blob is encrypted each time 1164cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root * it's written. 1165cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root */ 116672593ee807e89239d98ae08d32c733ecc08203baChad Brubaker if (upgradeBlob(filename, keyBlob, version, type, userId)) { 116772593ee807e89239d98ae08d32c733ecc08203baChad Brubaker if ((rc = this->put(filename, keyBlob, userId)) != NO_ERROR 1168f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root || (rc = keyBlob->readBlob(filename, userState->getDecryptionKey(), 1169f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root userState->getState())) != NO_ERROR) { 1170cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root return rc; 1171cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root } 1172cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root } 1173822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1174822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 117517208e0de5a42722901d803118745cca25fd10c1Kenny Root /* 117617208e0de5a42722901d803118745cca25fd10c1Kenny Root * This will upgrade software-backed keys to hardware-backed keys when 117717208e0de5a42722901d803118745cca25fd10c1Kenny Root * the HAL for the device supports the newer key types. 117817208e0de5a42722901d803118745cca25fd10c1Kenny Root */ 117917208e0de5a42722901d803118745cca25fd10c1Kenny Root if (rc == NO_ERROR && type == TYPE_KEY_PAIR 118017208e0de5a42722901d803118745cca25fd10c1Kenny Root && mDevice->common.module->module_api_version >= KEYMASTER_MODULE_API_VERSION_0_2 118117208e0de5a42722901d803118745cca25fd10c1Kenny Root && keyBlob->isFallback()) { 118217208e0de5a42722901d803118745cca25fd10c1Kenny Root ResponseCode imported = importKey(keyBlob->getValue(), keyBlob->getLength(), filename, 118372593ee807e89239d98ae08d32c733ecc08203baChad Brubaker userId, keyBlob->isEncrypted() ? KEYSTORE_FLAG_ENCRYPTED : KEYSTORE_FLAG_NONE); 118417208e0de5a42722901d803118745cca25fd10c1Kenny Root 118517208e0de5a42722901d803118745cca25fd10c1Kenny Root // The HAL allowed the import, reget the key to have the "fresh" 118617208e0de5a42722901d803118745cca25fd10c1Kenny Root // version. 118717208e0de5a42722901d803118745cca25fd10c1Kenny Root if (imported == NO_ERROR) { 118872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker rc = get(filename, keyBlob, TYPE_KEY_PAIR, userId); 118917208e0de5a42722901d803118745cca25fd10c1Kenny Root } 119017208e0de5a42722901d803118745cca25fd10c1Kenny Root } 119117208e0de5a42722901d803118745cca25fd10c1Kenny Root 11923a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker // Keymaster 0.3 keys are valid keymaster 1.0 keys, so silently upgrade. 11933a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (keyBlob->getType() == TYPE_KEY_PAIR) { 11943cc40125e8b495e7f0784dad53bb9acdb5b9a8ebChad Brubaker keyBlob->setType(TYPE_KEYMASTER_10); 11953a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker rc = this->put(filename, keyBlob, userId); 11963cc40125e8b495e7f0784dad53bb9acdb5b9a8ebChad Brubaker } 11973cc40125e8b495e7f0784dad53bb9acdb5b9a8ebChad Brubaker 1198d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (type != TYPE_ANY && keyBlob->getType() != type) { 1199822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGW("key found but type doesn't match: %d vs %d", keyBlob->getType(), type); 1200822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return KEY_NOT_FOUND; 1201822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1202822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1203822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return rc; 1204a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1205a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 120672593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode put(const char* filename, Blob* keyBlob, uid_t userId) { 120772593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserState(userId); 1208f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return keyBlob->writeBlob(filename, userState->getEncryptionKey(), userState->getState(), 1209f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root mEntropy); 1210a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1211a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 121272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode del(const char *filename, const BlobType type, uid_t userId) { 12134b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee Blob keyBlob; 121472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode rc = get(filename, &keyBlob, type, userId); 1215a9a17eeca2f5d9d3101a7e0bb136360697b6e2f0Chad Brubaker if (rc == ::VALUE_CORRUPTED) { 1216a9a17eeca2f5d9d3101a7e0bb136360697b6e2f0Chad Brubaker // The file is corrupt, the best we can do is rm it. 1217a9a17eeca2f5d9d3101a7e0bb136360697b6e2f0Chad Brubaker return (unlink(filename) && errno != ENOENT) ? ::SYSTEM_ERROR : ::NO_ERROR; 1218a9a17eeca2f5d9d3101a7e0bb136360697b6e2f0Chad Brubaker } 12194b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (rc != ::NO_ERROR) { 12204b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return rc; 12214b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12224b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 12234b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (keyBlob.getType() == ::TYPE_KEY_PAIR) { 12244b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee // A device doesn't have to implement delete_keypair. 12254b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (mDevice->delete_keypair != NULL && !keyBlob.isFallback()) { 12264b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (mDevice->delete_keypair(mDevice, keyBlob.getValue(), keyBlob.getLength())) { 12274b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee rc = ::SYSTEM_ERROR; 12284b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12294b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12304b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 123117d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker if (keyBlob.getType() == ::TYPE_KEYMASTER_10) { 123217d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker keymaster1_device_t* dev = getDeviceForBlob(keyBlob); 123317d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker if (dev->delete_key) { 123417d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker keymaster_key_blob_t blob; 123517d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker blob.key_material = keyBlob.getValue(); 123617d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker blob.key_material_size = keyBlob.getLength(); 123717d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker dev->delete_key(dev, &blob); 123817d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 123917d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 12404b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (rc != ::NO_ERROR) { 12414b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return rc; 12424b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12434b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 12444b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return (unlink(filename) && errno != ENOENT) ? ::SYSTEM_ERROR : ::NO_ERROR; 12454b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12464b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 1247e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker ResponseCode list(const android::String8& prefix, android::Vector<android::String16> *matches, 124872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker uid_t userId) { 12494b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 125072593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserState(userId); 12514b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee size_t n = prefix.length(); 12524b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 12534b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee DIR* dir = opendir(userState->getUserDirName()); 12544b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (!dir) { 12554b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee ALOGW("can't open directory for user: %s", strerror(errno)); 12564b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return ::SYSTEM_ERROR; 12574b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12584b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 12594b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee struct dirent* file; 12604b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee while ((file = readdir(dir)) != NULL) { 12614b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee // We only care about files. 12624b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (file->d_type != DT_REG) { 12634b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee continue; 12644b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12654b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 12664b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee // Skip anything that starts with a "." 12674b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (file->d_name[0] == '.') { 12684b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee continue; 12694b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12704b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 12714b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (!strncmp(prefix.string(), file->d_name, n)) { 12724b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee const char* p = &file->d_name[n]; 12734b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee size_t plen = strlen(p); 12744b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 12754b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee size_t extra = decode_key_length(p, plen); 12764b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee char *match = (char*) malloc(extra + 1); 12774b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (match != NULL) { 12784b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee decode_key(match, p, plen); 12794b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee matches->push(android::String16(match, extra)); 12804b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee free(match); 12814b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } else { 12824b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee ALOGW("could not allocate match of size %zd", extra); 12834b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12844b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12854b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12864b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee closedir(dir); 12874b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return ::NO_ERROR; 12884b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12894b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 129007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root void addGrant(const char* filename, uid_t granteeUid) { 1291655b958eb2180c7c06889f83f606d23421bf038cKenny Root const grant_t* existing = getGrant(filename, granteeUid); 1292655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (existing == NULL) { 1293655b958eb2180c7c06889f83f606d23421bf038cKenny Root grant_t* grant = new grant_t; 129407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root grant->uid = granteeUid; 1295a8c703d9fdd98e3caefb6e74cd03c2878cecd0a1Brian Carlstrom grant->filename = reinterpret_cast<const uint8_t*>(strdup(filename)); 1296655b958eb2180c7c06889f83f606d23421bf038cKenny Root mGrants.add(grant); 129770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 129870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 129970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 130007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root bool removeGrant(const char* filename, uid_t granteeUid) { 1301655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<grant_t*>::iterator it(mGrants.begin()); 1302655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mGrants.end(); it++) { 1303655b958eb2180c7c06889f83f606d23421bf038cKenny Root grant_t* grant = *it; 1304655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (grant->uid == granteeUid 1305655b958eb2180c7c06889f83f606d23421bf038cKenny Root && !strcmp(reinterpret_cast<const char*>(grant->filename), filename)) { 1306655b958eb2180c7c06889f83f606d23421bf038cKenny Root mGrants.erase(it); 1307655b958eb2180c7c06889f83f606d23421bf038cKenny Root return true; 1308655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 130970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 131070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return false; 131170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 131270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1313a8c703d9fdd98e3caefb6e74cd03c2878cecd0a1Brian Carlstrom bool hasGrant(const char* filename, const uid_t uid) const { 1314a8c703d9fdd98e3caefb6e74cd03c2878cecd0a1Brian Carlstrom return getGrant(filename, uid) != NULL; 131570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 131670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 131772593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode importKey(const uint8_t* key, size_t keyLen, const char* filename, uid_t userId, 1318f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root int32_t flags) { 1319822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root uint8_t* data; 1320822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root size_t dataLength; 1321822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root int rc; 1322822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1323822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (mDevice->import_keypair == NULL) { 1324822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGE("Keymaster doesn't support import!"); 1325822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return SYSTEM_ERROR; 1326822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1327822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 132817208e0de5a42722901d803118745cca25fd10c1Kenny Root bool isFallback = false; 132907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root rc = mDevice->import_keypair(mDevice, key, keyLen, &data, &dataLength); 1330822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (rc) { 1331a39da5a226975f8b75f93de255a21d526ae8d334Kenny Root /* 1332a39da5a226975f8b75f93de255a21d526ae8d334Kenny Root * Maybe the device doesn't support this type of key. Try to use the 1333a39da5a226975f8b75f93de255a21d526ae8d334Kenny Root * software fallback keymaster implementation. This is a little bit 1334a39da5a226975f8b75f93de255a21d526ae8d334Kenny Root * lazier than checking the PKCS#8 key type, but the software 1335a39da5a226975f8b75f93de255a21d526ae8d334Kenny Root * implementation will do that anyway. 1336a39da5a226975f8b75f93de255a21d526ae8d334Kenny Root */ 13377c1eb75a6898452867ca28a4d7fad2d91edca615Chad Brubaker rc = mFallbackDevice->import_keypair(mFallbackDevice, key, keyLen, &data, &dataLength); 1338a39da5a226975f8b75f93de255a21d526ae8d334Kenny Root isFallback = true; 133917208e0de5a42722901d803118745cca25fd10c1Kenny Root 134017208e0de5a42722901d803118745cca25fd10c1Kenny Root if (rc) { 134117208e0de5a42722901d803118745cca25fd10c1Kenny Root ALOGE("Error while importing keypair: %d", rc); 134217208e0de5a42722901d803118745cca25fd10c1Kenny Root return SYSTEM_ERROR; 134317208e0de5a42722901d803118745cca25fd10c1Kenny Root } 1344822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1345822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1346822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root Blob keyBlob(data, dataLength, NULL, 0, TYPE_KEY_PAIR); 1347822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root free(data); 1348822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1349f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root keyBlob.setEncrypted(flags & KEYSTORE_FLAG_ENCRYPTED); 135017208e0de5a42722901d803118745cca25fd10c1Kenny Root keyBlob.setFallback(isFallback); 1351f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 135272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return put(filename, &keyBlob, userId); 1353822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1354822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 13551b0e3933900c7ea21189704d5db64e7346aee7afKenny Root bool isHardwareBacked(const android::String16& keyType) const { 13561b0e3933900c7ea21189704d5db64e7346aee7afKenny Root if (mDevice == NULL) { 13571b0e3933900c7ea21189704d5db64e7346aee7afKenny Root ALOGW("can't get keymaster device"); 13581b0e3933900c7ea21189704d5db64e7346aee7afKenny Root return false; 13591b0e3933900c7ea21189704d5db64e7346aee7afKenny Root } 13601b0e3933900c7ea21189704d5db64e7346aee7afKenny Root 13611b0e3933900c7ea21189704d5db64e7346aee7afKenny Root if (sRSAKeyType == keyType) { 13621b0e3933900c7ea21189704d5db64e7346aee7afKenny Root return (mDevice->flags & KEYMASTER_SOFTWARE_ONLY) == 0; 13631b0e3933900c7ea21189704d5db64e7346aee7afKenny Root } else { 13641b0e3933900c7ea21189704d5db64e7346aee7afKenny Root return (mDevice->flags & KEYMASTER_SOFTWARE_ONLY) == 0 13651b0e3933900c7ea21189704d5db64e7346aee7afKenny Root && (mDevice->common.module->module_api_version 13661b0e3933900c7ea21189704d5db64e7346aee7afKenny Root >= KEYMASTER_MODULE_API_VERSION_0_2); 13671b0e3933900c7ea21189704d5db64e7346aee7afKenny Root } 13688ddf35a6e1fd80a7d0685041d2bfc77078277c9dKenny Root } 13698ddf35a6e1fd80a7d0685041d2bfc77078277c9dKenny Root 1370655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode getKeyForName(Blob* keyBlob, const android::String8& keyName, const uid_t uid, 1371655b958eb2180c7c06889f83f606d23421bf038cKenny Root const BlobType type) { 137286b16e8c0d353af97f0411917789308dba417295Kenny Root android::String8 filepath8(getKeyNameForUidWithDir(keyName, uid)); 137372593ee807e89239d98ae08d32c733ecc08203baChad Brubaker uid_t userId = get_user_id(uid); 1374a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 137572593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode responseCode = get(filepath8.string(), keyBlob, type, userId); 1376655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (responseCode == NO_ERROR) { 1377655b958eb2180c7c06889f83f606d23421bf038cKenny Root return responseCode; 1378655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1379a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1380655b958eb2180c7c06889f83f606d23421bf038cKenny Root // If this is one of the legacy UID->UID mappings, use it. 1381655b958eb2180c7c06889f83f606d23421bf038cKenny Root uid_t euid = get_keystore_euid(uid); 1382655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (euid != uid) { 138386b16e8c0d353af97f0411917789308dba417295Kenny Root filepath8 = getKeyNameForUidWithDir(keyName, euid); 138472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker responseCode = get(filepath8.string(), keyBlob, type, userId); 1385655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (responseCode == NO_ERROR) { 1386655b958eb2180c7c06889f83f606d23421bf038cKenny Root return responseCode; 1387655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1388655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 138970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1390655b958eb2180c7c06889f83f606d23421bf038cKenny Root // They might be using a granted key. 139186b16e8c0d353af97f0411917789308dba417295Kenny Root android::String8 filename8 = getKeyName(keyName); 1392655b958eb2180c7c06889f83f606d23421bf038cKenny Root char* end; 139386b16e8c0d353af97f0411917789308dba417295Kenny Root strtoul(filename8.string(), &end, 10); 1394655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (end[0] != '_' || end[1] == 0) { 1395655b958eb2180c7c06889f83f606d23421bf038cKenny Root return KEY_NOT_FOUND; 1396655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 139772593ee807e89239d98ae08d32c733ecc08203baChad Brubaker filepath8 = android::String8::format("%s/%s", getUserState(userId)->getUserDirName(), 139886b16e8c0d353af97f0411917789308dba417295Kenny Root filename8.string()); 1399655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!hasGrant(filepath8.string(), uid)) { 1400655b958eb2180c7c06889f83f606d23421bf038cKenny Root return responseCode; 1401a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1402a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1403655b958eb2180c7c06889f83f606d23421bf038cKenny Root // It is a granted key. Try to load it. 140472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return get(filepath8.string(), keyBlob, type, userId); 1405a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1406a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1407655b958eb2180c7c06889f83f606d23421bf038cKenny Root /** 1408655b958eb2180c7c06889f83f606d23421bf038cKenny Root * Returns any existing UserState or creates it if it doesn't exist. 1409655b958eb2180c7c06889f83f606d23421bf038cKenny Root */ 141072593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* getUserState(uid_t userId) { 1411655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<UserState*>::iterator it(mMasterKeys.begin()); 1412655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mMasterKeys.end(); it++) { 1413655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState* state = *it; 1414655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (state->getUserId() == userId) { 1415655b958eb2180c7c06889f83f606d23421bf038cKenny Root return state; 1416655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1417a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1418655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1419655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState* userState = new UserState(userId); 1420655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!userState->initialize()) { 1421655b958eb2180c7c06889f83f606d23421bf038cKenny Root /* There's not much we can do if initialization fails. Trying to 1422655b958eb2180c7c06889f83f606d23421bf038cKenny Root * unlock the keystore for that user will fail as well, so any 1423655b958eb2180c7c06889f83f606d23421bf038cKenny Root * subsequent request for this user will just return SYSTEM_ERROR. 1424655b958eb2180c7c06889f83f606d23421bf038cKenny Root */ 1425655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGE("User initialization failed for %u; subsuquent operations will fail", userId); 1426a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1427655b958eb2180c7c06889f83f606d23421bf038cKenny Root mMasterKeys.add(userState); 1428655b958eb2180c7c06889f83f606d23421bf038cKenny Root return userState; 1429a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1430a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1431655b958eb2180c7c06889f83f606d23421bf038cKenny Root /** 143272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker * Returns any existing UserState or creates it if it doesn't exist. 1433655b958eb2180c7c06889f83f606d23421bf038cKenny Root */ 143472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* getUserStateByUid(uid_t uid) { 1435655b958eb2180c7c06889f83f606d23421bf038cKenny Root uid_t userId = get_user_id(uid); 143672593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return getUserState(userId); 143772593ee807e89239d98ae08d32c733ecc08203baChad Brubaker } 1438655b958eb2180c7c06889f83f606d23421bf038cKenny Root 143972593ee807e89239d98ae08d32c733ecc08203baChad Brubaker /** 144072593ee807e89239d98ae08d32c733ecc08203baChad Brubaker * Returns NULL if the UserState doesn't already exist. 144172593ee807e89239d98ae08d32c733ecc08203baChad Brubaker */ 144272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker const UserState* getUserState(uid_t userId) const { 1443655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<UserState*>::const_iterator it(mMasterKeys.begin()); 1444655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mMasterKeys.end(); it++) { 1445655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState* state = *it; 1446655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (state->getUserId() == userId) { 1447655b958eb2180c7c06889f83f606d23421bf038cKenny Root return state; 1448655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1449655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1450a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1451655b958eb2180c7c06889f83f606d23421bf038cKenny Root return NULL; 1452a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1453a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 145472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker /** 145572593ee807e89239d98ae08d32c733ecc08203baChad Brubaker * Returns NULL if the UserState doesn't already exist. 145672593ee807e89239d98ae08d32c733ecc08203baChad Brubaker */ 145772593ee807e89239d98ae08d32c733ecc08203baChad Brubaker const UserState* getUserStateByUid(uid_t uid) const { 145872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker uid_t userId = get_user_id(uid); 145972593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return getUserState(userId); 146072593ee807e89239d98ae08d32c733ecc08203baChad Brubaker } 146172593ee807e89239d98ae08d32c733ecc08203baChad Brubaker 1462655b958eb2180c7c06889f83f606d23421bf038cKenny Rootprivate: 1463655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const char* sOldMasterKey; 1464655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const char* sMetaDataFile; 14651b0e3933900c7ea21189704d5db64e7346aee7afKenny Root static const android::String16 sRSAKeyType; 1466655b958eb2180c7c06889f83f606d23421bf038cKenny Root Entropy* mEntropy; 146707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 146867d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker keymaster1_device_t* mDevice; 146967d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker keymaster1_device_t* mFallbackDevice; 1470a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1471655b958eb2180c7c06889f83f606d23421bf038cKenny Root android::Vector<UserState*> mMasterKeys; 1472655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1473655b958eb2180c7c06889f83f606d23421bf038cKenny Root android::Vector<grant_t*> mGrants; 147470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1475655b958eb2180c7c06889f83f606d23421bf038cKenny Root typedef struct { 1476655b958eb2180c7c06889f83f606d23421bf038cKenny Root uint32_t version; 1477655b958eb2180c7c06889f83f606d23421bf038cKenny Root } keystore_metadata_t; 147870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1479655b958eb2180c7c06889f83f606d23421bf038cKenny Root keystore_metadata_t mMetaData; 1480655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1481655b958eb2180c7c06889f83f606d23421bf038cKenny Root const grant_t* getGrant(const char* filename, uid_t uid) const { 1482655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<grant_t*>::const_iterator it(mGrants.begin()); 1483655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mGrants.end(); it++) { 1484655b958eb2180c7c06889f83f606d23421bf038cKenny Root grant_t* grant = *it; 148570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root if (grant->uid == uid 1486655b958eb2180c7c06889f83f606d23421bf038cKenny Root && !strcmp(reinterpret_cast<const char*>(grant->filename), filename)) { 148770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return grant; 148870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 148970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 149070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return NULL; 149170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 149270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1493822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root /** 1494822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Upgrade code. This will upgrade the key from the current version 1495822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * to whatever is newest. 1496822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root */ 1497655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool upgradeBlob(const char* filename, Blob* blob, const uint8_t oldVersion, 1498655b958eb2180c7c06889f83f606d23421bf038cKenny Root const BlobType type, uid_t uid) { 1499822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root bool updated = false; 1500822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root uint8_t version = oldVersion; 1501822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1502822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root /* From V0 -> V1: All old types were unknown */ 1503822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (version == 0) { 1504822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGV("upgrading to version 1 and setting type %d", type); 1505822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1506822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root blob->setType(type); 1507822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (type == TYPE_KEY_PAIR) { 1508655b958eb2180c7c06889f83f606d23421bf038cKenny Root importBlobAsKey(blob, filename, uid); 1509822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1510822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root version = 1; 1511822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root updated = true; 1512822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1513822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1514f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root /* From V1 -> V2: All old keys were encrypted */ 1515f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (version == 1) { 1516f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ALOGV("upgrading to version 2"); 1517f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 1518f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root blob->setEncrypted(true); 1519f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root version = 2; 1520f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root updated = true; 1521f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 1522f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 1523822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root /* 1524822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * If we've updated, set the key blob to the right version 1525822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * and write it. 1526cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root */ 1527822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (updated) { 1528822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGV("updated and writing file %s", filename); 1529822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root blob->setVersion(version); 1530822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1531cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root 1532cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root return updated; 1533822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1534822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1535822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root /** 1536822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Takes a blob that is an PEM-encoded RSA key as a byte array and 1537822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * converts it to a DER-encoded PKCS#8 for import into a keymaster. 1538822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Then it overwrites the original blob with the new blob 1539822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * format that is returned from the keymaster. 1540822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root */ 1541655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode importBlobAsKey(Blob* blob, const char* filename, uid_t uid) { 1542822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root // We won't even write to the blob directly with this BIO, so const_cast is okay. 1543822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root Unique_BIO b(BIO_new_mem_buf(const_cast<uint8_t*>(blob->getValue()), blob->getLength())); 1544822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (b.get() == NULL) { 1545822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGE("Problem instantiating BIO"); 1546822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return SYSTEM_ERROR; 1547822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1548822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1549822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root Unique_EVP_PKEY pkey(PEM_read_bio_PrivateKey(b.get(), NULL, NULL, NULL)); 1550822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (pkey.get() == NULL) { 1551822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGE("Couldn't read old PEM file"); 1552822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return SYSTEM_ERROR; 1553822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1554822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1555822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root Unique_PKCS8_PRIV_KEY_INFO pkcs8(EVP_PKEY2PKCS8(pkey.get())); 1556822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root int len = i2d_PKCS8_PRIV_KEY_INFO(pkcs8.get(), NULL); 1557822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (len < 0) { 1558822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGE("Couldn't measure PKCS#8 length"); 1559822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return SYSTEM_ERROR; 1560822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1561822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 156270c9889c5ca912e7c492580e1999f18ab65b267bKenny Root UniquePtr<unsigned char[]> pkcs8key(new unsigned char[len]); 156370c9889c5ca912e7c492580e1999f18ab65b267bKenny Root uint8_t* tmp = pkcs8key.get(); 1564822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (i2d_PKCS8_PRIV_KEY_INFO(pkcs8.get(), &tmp) != len) { 1565822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGE("Couldn't convert to PKCS#8"); 1566822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return SYSTEM_ERROR; 1567822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1568822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 156972593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode rc = importKey(pkcs8key.get(), len, filename, get_user_id(uid), 1570f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root blob->isEncrypted() ? KEYSTORE_FLAG_ENCRYPTED : KEYSTORE_FLAG_NONE); 1571822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (rc != NO_ERROR) { 1572822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return rc; 1573822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1574822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1575655b958eb2180c7c06889f83f606d23421bf038cKenny Root return get(filename, blob, TYPE_KEY_PAIR, uid); 1576822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 157770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1578655b958eb2180c7c06889f83f606d23421bf038cKenny Root void readMetaData() { 1579655b958eb2180c7c06889f83f606d23421bf038cKenny Root int in = TEMP_FAILURE_RETRY(open(sMetaDataFile, O_RDONLY)); 1580655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (in < 0) { 1581655b958eb2180c7c06889f83f606d23421bf038cKenny Root return; 1582655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1583655b958eb2180c7c06889f83f606d23421bf038cKenny Root size_t fileLength = readFully(in, (uint8_t*) &mMetaData, sizeof(mMetaData)); 1584655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (fileLength != sizeof(mMetaData)) { 1585655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGI("Metadata file is %zd bytes (%zd experted); upgrade?", fileLength, 1586655b958eb2180c7c06889f83f606d23421bf038cKenny Root sizeof(mMetaData)); 1587655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1588655b958eb2180c7c06889f83f606d23421bf038cKenny Root close(in); 158970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 159070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1591655b958eb2180c7c06889f83f606d23421bf038cKenny Root void writeMetaData() { 1592655b958eb2180c7c06889f83f606d23421bf038cKenny Root const char* tmpFileName = ".metadata.tmp"; 1593655b958eb2180c7c06889f83f606d23421bf038cKenny Root int out = TEMP_FAILURE_RETRY(open(tmpFileName, 1594655b958eb2180c7c06889f83f606d23421bf038cKenny Root O_WRONLY | O_TRUNC | O_CREAT, S_IRUSR | S_IWUSR)); 1595655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (out < 0) { 1596655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGE("couldn't write metadata file: %s", strerror(errno)); 1597655b958eb2180c7c06889f83f606d23421bf038cKenny Root return; 1598655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1599655b958eb2180c7c06889f83f606d23421bf038cKenny Root size_t fileLength = writeFully(out, (uint8_t*) &mMetaData, sizeof(mMetaData)); 1600655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (fileLength != sizeof(mMetaData)) { 1601655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGI("Could only write %zd bytes to metadata file (%zd expected)", fileLength, 1602655b958eb2180c7c06889f83f606d23421bf038cKenny Root sizeof(mMetaData)); 160370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 1604655b958eb2180c7c06889f83f606d23421bf038cKenny Root close(out); 1605655b958eb2180c7c06889f83f606d23421bf038cKenny Root rename(tmpFileName, sMetaDataFile); 160670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 160770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1608655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool upgradeKeystore() { 1609655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool upgraded = false; 1610655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1611655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (mMetaData.version == 0) { 161272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserStateByUid(0); 1613655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1614655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Initialize first so the directory is made. 1615655b958eb2180c7c06889f83f606d23421bf038cKenny Root userState->initialize(); 1616655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1617655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Migrate the old .masterkey file to user 0. 1618655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(sOldMasterKey, R_OK) == 0) { 1619655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (rename(sOldMasterKey, userState->getMasterKeyFileName()) < 0) { 1620655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGE("couldn't migrate old masterkey: %s", strerror(errno)); 1621655b958eb2180c7c06889f83f606d23421bf038cKenny Root return false; 1622655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1623655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1624655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1625655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Initialize again in case we had a key. 1626655b958eb2180c7c06889f83f606d23421bf038cKenny Root userState->initialize(); 1627655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1628655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Try to migrate existing keys. 1629655b958eb2180c7c06889f83f606d23421bf038cKenny Root DIR* dir = opendir("."); 1630655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!dir) { 1631655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Give up now; maybe we can upgrade later. 1632655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGE("couldn't open keystore's directory; something is wrong"); 1633655b958eb2180c7c06889f83f606d23421bf038cKenny Root return false; 1634655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1635655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1636655b958eb2180c7c06889f83f606d23421bf038cKenny Root struct dirent* file; 1637655b958eb2180c7c06889f83f606d23421bf038cKenny Root while ((file = readdir(dir)) != NULL) { 1638655b958eb2180c7c06889f83f606d23421bf038cKenny Root // We only care about files. 1639655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (file->d_type != DT_REG) { 1640655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1641655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1642655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1643655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Skip anything that starts with a "." 1644655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (file->d_name[0] == '.') { 1645655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1646655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1647655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1648655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Find the current file's user. 1649655b958eb2180c7c06889f83f606d23421bf038cKenny Root char* end; 1650655b958eb2180c7c06889f83f606d23421bf038cKenny Root unsigned long thisUid = strtoul(file->d_name, &end, 10); 1651655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (end[0] != '_' || end[1] == 0) { 1652655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1653655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 165472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* otherUser = getUserStateByUid(thisUid); 1655655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (otherUser->getUserId() != 0) { 1656655b958eb2180c7c06889f83f606d23421bf038cKenny Root unlinkat(dirfd(dir), file->d_name, 0); 1657655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1658655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1659655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Rename the file into user directory. 1660655b958eb2180c7c06889f83f606d23421bf038cKenny Root DIR* otherdir = opendir(otherUser->getUserDirName()); 1661655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (otherdir == NULL) { 1662655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("couldn't open user directory for rename"); 1663655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1664655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1665655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (renameat(dirfd(dir), file->d_name, dirfd(otherdir), file->d_name) < 0) { 1666655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("couldn't rename blob: %s: %s", file->d_name, strerror(errno)); 1667655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1668655b958eb2180c7c06889f83f606d23421bf038cKenny Root closedir(otherdir); 1669655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1670655b958eb2180c7c06889f83f606d23421bf038cKenny Root closedir(dir); 1671655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1672655b958eb2180c7c06889f83f606d23421bf038cKenny Root mMetaData.version = 1; 1673655b958eb2180c7c06889f83f606d23421bf038cKenny Root upgraded = true; 1674655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1675655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1676655b958eb2180c7c06889f83f606d23421bf038cKenny Root return upgraded; 167770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 1678655b958eb2180c7c06889f83f606d23421bf038cKenny Root}; 167970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1680655b958eb2180c7c06889f83f606d23421bf038cKenny Rootconst char* KeyStore::sOldMasterKey = ".masterkey"; 1681655b958eb2180c7c06889f83f606d23421bf038cKenny Rootconst char* KeyStore::sMetaDataFile = ".metadata"; 168270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 16831b0e3933900c7ea21189704d5db64e7346aee7afKenny Rootconst android::String16 KeyStore::sRSAKeyType("RSA"); 16841b0e3933900c7ea21189704d5db64e7346aee7afKenny Root 168507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootnamespace android { 168607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootclass KeyStoreProxy : public BnKeystoreService, public IBinder::DeathRecipient { 168707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootpublic: 168807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root KeyStoreProxy(KeyStore* keyStore) 168940a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker : mKeyStore(keyStore), 169040a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker mOperationMap(this) 169107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root { 169207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1693a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 169440a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker void binderDied(const wp<IBinder>& who) { 169540a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker auto operations = mOperationMap.getOperationsForToken(who.unsafe_get()); 169640a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker for (auto token: operations) { 169740a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker abort(token); 169840a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 169907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1700a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1701e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker int32_t getState(int32_t userId) { 1702e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker if (!checkBinderPermission(P_GET_STATE)) { 170307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 170407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1705a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1706e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker return mKeyStore->getState(userId); 1707a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1708a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 170907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t get(const String16& name, uint8_t** item, size_t* itemLength) { 17109489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_GET)) { 171107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 171207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1713a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 17149489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker uid_t callingUid = IPCThreadState::self()->getCallingUid(); 171507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 171607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root Blob keyBlob; 171766dbf67dd65b4808a15ef64f0ffde1275bdd58a9Nick Kralevich 1718655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode responseCode = mKeyStore->getKeyForName(&keyBlob, name8, callingUid, 1719494689083467ec372a58f094f041c8f102f39393Kenny Root TYPE_GENERIC); 172007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (responseCode != ::NO_ERROR) { 172107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *item = NULL; 172207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *itemLength = 0; 172307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return responseCode; 172407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 172507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 172607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *item = (uint8_t*) malloc(keyBlob.getLength()); 172707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root memcpy(*item, keyBlob.getValue(), keyBlob.getLength()); 172807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *itemLength = keyBlob.getLength(); 172907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 173007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 1731a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1732a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1733f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root int32_t insert(const String16& name, const uint8_t* item, size_t itemLength, int targetUid, 1734f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root int32_t flags) { 17359489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker targetUid = getEffectiveUid(targetUid); 17369489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker int32_t result = checkBinderPermissionAndKeystoreState(P_INSERT, targetUid, 17379489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker flags & KEYSTORE_FLAG_ENCRYPTED); 17389489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (result != ::NO_ERROR) { 17399489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return result; 1740b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root } 1741b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root 174207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 1743655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid)); 174407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 174507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root Blob keyBlob(item, itemLength, NULL, 0, ::TYPE_GENERIC); 1746ee8068b9e7bfb2770635062fc9c2035be2142bd8Kenny Root keyBlob.setEncrypted(flags & KEYSTORE_FLAG_ENCRYPTED); 1747ee8068b9e7bfb2770635062fc9c2035be2142bd8Kenny Root 174872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->put(filename.string(), &keyBlob, get_user_id(targetUid)); 1749a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1750a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1751494689083467ec372a58f094f041c8f102f39393Kenny Root int32_t del(const String16& name, int targetUid) { 17529489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker targetUid = getEffectiveUid(targetUid); 17539489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_DELETE, targetUid)) { 1754b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root return ::PERMISSION_DENIED; 1755b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root } 175607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 1757655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid)); 175872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->del(filename.string(), ::TYPE_ANY, get_user_id(targetUid)); 1759298e7b1b0f9116e2054d594d7538379d86585035Kenny Root } 1760298e7b1b0f9116e2054d594d7538379d86585035Kenny Root 1761494689083467ec372a58f094f041c8f102f39393Kenny Root int32_t exist(const String16& name, int targetUid) { 17629489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker targetUid = getEffectiveUid(targetUid); 17639489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_EXIST, targetUid)) { 1764b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root return ::PERMISSION_DENIED; 1765b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root } 1766b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root 176707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 1768655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid)); 176907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 1770655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(filename.string(), R_OK) == -1) { 177107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return (errno != ENOENT) ? ::SYSTEM_ERROR : ::KEY_NOT_FOUND; 177207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 177307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 1774298e7b1b0f9116e2054d594d7538379d86585035Kenny Root } 1775298e7b1b0f9116e2054d594d7538379d86585035Kenny Root 1776e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker int32_t list(const String16& prefix, int targetUid, Vector<String16>* matches) { 17779489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker targetUid = getEffectiveUid(targetUid); 1778e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker if (!checkBinderPermission(P_LIST, targetUid)) { 1779b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root return ::PERMISSION_DENIED; 1780b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root } 178107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const String8 prefix8(prefix); 1782655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUid(prefix8, targetUid)); 178307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 1784e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker if (mKeyStore->list(filename, matches, get_user_id(targetUid)) != ::NO_ERROR) { 17854b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return ::SYSTEM_ERROR; 178607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 178707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 1788298e7b1b0f9116e2054d594d7538379d86585035Kenny Root } 1789298e7b1b0f9116e2054d594d7538379d86585035Kenny Root 179007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t reset() { 17919489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_RESET)) { 179207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 179307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1794a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 17959489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker uid_t callingUid = IPCThreadState::self()->getCallingUid(); 179696d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker mKeyStore->resetUser(get_user_id(callingUid), false); 179796d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker return ::NO_ERROR; 1798a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1799a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 180096d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker int32_t onUserPasswordChanged(int32_t userId, const String16& password) { 18019489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_PASSWORD)) { 180207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 180307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1804a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 180507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const String8 password8(password); 180696d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker // Flush the auth token table to prevent stale tokens from sticking 180796d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker // around. 180896d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker mAuthTokenTable.Clear(); 180996d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker 181096d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if (password.size() == 0) { 181196d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker ALOGI("Secure lockscreen for user %d removed, deleting encrypted entries", userId); 181272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker mKeyStore->resetUser(userId, true); 181396d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker return ::NO_ERROR; 181496d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } else { 181572593ee807e89239d98ae08d32c733ecc08203baChad Brubaker switch (mKeyStore->getState(userId)) { 181696d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker case ::STATE_UNINITIALIZED: { 181796d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker // generate master key, encrypt with password, write to file, 181896d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker // initialize mMasterKey*. 181972593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->initializeUser(password8, userId); 182096d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 182196d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker case ::STATE_NO_ERROR: { 182296d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker // rewrite master key with new password. 182372593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->writeMasterKey(password8, userId); 182496d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 182596d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker case ::STATE_LOCKED: { 182696d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker ALOGE("Changing user %d's password while locked, clearing old encryption", 182796d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker userId); 182872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker mKeyStore->resetUser(userId, true); 182972593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->initializeUser(password8, userId); 183096d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 183107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 183296d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker return ::SYSTEM_ERROR; 183307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 183407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1835a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1836c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker int32_t onUserAdded(int32_t userId, int32_t parentId) { 1837c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker if (!checkBinderPermission(P_USER_CHANGED)) { 1838c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker return ::PERMISSION_DENIED; 1839c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker } 1840c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker 1841c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker // Sanity check that the new user has an empty keystore. 1842c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker if (!mKeyStore->isEmpty(userId)) { 1843c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker ALOGW("New user %d's keystore not empty. Clearing old entries.", userId); 1844c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker } 1845c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker // Unconditionally clear the keystore, just to be safe. 1846c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker mKeyStore->resetUser(userId, false); 1847c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker 1848c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker // If the user has a parent user then use the parent's 1849c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker // masterkey/password, otherwise there's nothing to do. 1850c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker if (parentId != -1) { 1851c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker return mKeyStore->copyMasterKey(parentId, userId); 1852c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker } else { 1853c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker return ::NO_ERROR; 1854c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker } 1855c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker } 1856c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker 1857c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker int32_t onUserRemoved(int32_t userId) { 1858c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker if (!checkBinderPermission(P_USER_CHANGED)) { 1859c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker return ::PERMISSION_DENIED; 1860c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker } 1861c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker 1862c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker mKeyStore->resetUser(userId, false); 1863c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker return ::NO_ERROR; 1864c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker } 1865c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker 1866e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker int32_t lock(int32_t userId) { 18679489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_LOCK)) { 186807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 186907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 187007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 187172593ee807e89239d98ae08d32c733ecc08203baChad Brubaker State state = mKeyStore->getState(userId); 18729d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root if (state != ::STATE_NO_ERROR) { 187307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ALOGD("calling lock in state: %d", state); 187407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return state; 187507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 187670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 187772593ee807e89239d98ae08d32c733ecc08203baChad Brubaker mKeyStore->lock(userId); 187807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 187970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 1880a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 188196d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker int32_t unlock(int32_t userId, const String16& pw) { 18829489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_UNLOCK)) { 188307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 188407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 188507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 188672593ee807e89239d98ae08d32c733ecc08203baChad Brubaker State state = mKeyStore->getState(userId); 18879d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root if (state != ::STATE_LOCKED) { 188896d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker ALOGI("calling unlock when not locked, ignoring."); 188907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return state; 189007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 189107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 189207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const String8 password8(pw); 189396d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker // read master key, decrypt with password, initialize mMasterKey*. 189472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->readMasterKey(password8, userId); 189570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 189670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1897e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker bool isEmpty(int32_t userId) { 1898e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker if (!checkBinderPermission(P_IS_EMPTY)) { 1899e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker return false; 190007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 190170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1902e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker return mKeyStore->isEmpty(userId); 190370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 190470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 190596427baf0094d50047049d329b0779c3c910402cKenny Root int32_t generate(const String16& name, int32_t targetUid, int32_t keyType, int32_t keySize, 190696427baf0094d50047049d329b0779c3c910402cKenny Root int32_t flags, Vector<sp<KeystoreArg> >* args) { 19079489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker targetUid = getEffectiveUid(targetUid); 19089489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker int32_t result = checkBinderPermissionAndKeystoreState(P_INSERT, targetUid, 19099489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker flags & KEYSTORE_FLAG_ENCRYPTED); 19109489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (result != ::NO_ERROR) { 19119489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return result; 191207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 191370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 19143a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker KeymasterArguments params; 19153a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker addLegacyKeyAuthorizations(params.params); 191670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 19173a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker switch (keyType) { 19183a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker case EVP_PKEY_EC: { 19193a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.params.push_back(keymaster_param_enum(KM_TAG_ALGORITHM, KM_ALGORITHM_EC)); 19203a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (keySize == -1) { 19213a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker keySize = EC_DEFAULT_KEY_SIZE; 19223a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } else if (keySize < EC_MIN_KEY_SIZE || keySize > EC_MAX_KEY_SIZE) { 19233a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGI("invalid key size %d", keySize); 192496427baf0094d50047049d329b0779c3c910402cKenny Root return ::SYSTEM_ERROR; 192596427baf0094d50047049d329b0779c3c910402cKenny Root } 19263a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.params.push_back(keymaster_param_int(KM_TAG_KEY_SIZE, keySize)); 19273a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker break; 192896427baf0094d50047049d329b0779c3c910402cKenny Root } 19293a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker case EVP_PKEY_RSA: { 19303a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.params.push_back(keymaster_param_enum(KM_TAG_ALGORITHM, KM_ALGORITHM_RSA)); 19313a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (keySize == -1) { 19323a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker keySize = RSA_DEFAULT_KEY_SIZE; 19333a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } else if (keySize < RSA_MIN_KEY_SIZE || keySize > RSA_MAX_KEY_SIZE) { 19343a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGI("invalid key size %d", keySize); 19353a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::SYSTEM_ERROR; 19363a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 19373a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.params.push_back(keymaster_param_int(KM_TAG_KEY_SIZE, keySize)); 19383a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker unsigned long exponent = RSA_DEFAULT_EXPONENT; 19393a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (args->size() > 1) { 19403a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGI("invalid number of arguments: %zu", args->size()); 19413a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::SYSTEM_ERROR; 19423a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } else if (args->size() == 1) { 19433a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker sp<KeystoreArg> expArg = args->itemAt(0); 19443a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (expArg != NULL) { 19453a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker Unique_BIGNUM pubExpBn( 19463a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker BN_bin2bn(reinterpret_cast<const unsigned char*>(expArg->data()), 19473a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker expArg->size(), NULL)); 19483a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (pubExpBn.get() == NULL) { 19493a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGI("Could not convert public exponent to BN"); 19503a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::SYSTEM_ERROR; 19513a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 19523a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker exponent = BN_get_word(pubExpBn.get()); 19533a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (exponent == 0xFFFFFFFFL) { 19543a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("cannot represent public exponent as a long value"); 19553a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::SYSTEM_ERROR; 19563a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 19573a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } else { 19583a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("public exponent not read"); 195996427baf0094d50047049d329b0779c3c910402cKenny Root return ::SYSTEM_ERROR; 196096427baf0094d50047049d329b0779c3c910402cKenny Root } 196196427baf0094d50047049d329b0779c3c910402cKenny Root } 19623a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.params.push_back(keymaster_param_long(KM_TAG_RSA_PUBLIC_EXPONENT, 19633a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker exponent)); 19643a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker break; 19653a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 19663a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker default: { 19673a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("Unsupported key type %d", keyType); 19683a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::SYSTEM_ERROR; 196996427baf0094d50047049d329b0779c3c910402cKenny Root } 197096427baf0094d50047049d329b0779c3c910402cKenny Root } 197170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 19723a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker int32_t rc = generateKey(name, params, NULL, 0, targetUid, flags, 19733a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker /*outCharacteristics*/ NULL); 19743a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (rc != ::NO_ERROR) { 19753a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("generate failed: %d", rc); 197607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 19773a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return translateResultToLegacyResult(rc); 197870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 197970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1980f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root int32_t import(const String16& name, const uint8_t* data, size_t length, int targetUid, 1981f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root int32_t flags) { 19823a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker KeymasterArguments params; 19833a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker addLegacyKeyAuthorizations(params.params); 19843a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker const uint8_t* ptr = data; 19859a53d3eaf42104ddf02feeccec3cf7f5c1a34baeKenny Root 19863a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker Unique_PKCS8_PRIV_KEY_INFO pkcs8(d2i_PKCS8_PRIV_KEY_INFO(NULL, &ptr, length)); 19873a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (!pkcs8.get()) { 198807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::SYSTEM_ERROR; 198907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 19903a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker Unique_EVP_PKEY pkey(EVP_PKCS82PKEY(pkcs8.get())); 19913a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (!pkey.get()) { 199207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::SYSTEM_ERROR; 199307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 19943a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker int type = EVP_PKEY_type(pkey->type); 19953a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker switch (type) { 19963a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker case EVP_PKEY_RSA: 19973a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.params.push_back(keymaster_param_enum(KM_TAG_ALGORITHM, KM_ALGORITHM_RSA)); 19983a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker break; 19993a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker case EVP_PKEY_EC: 20003a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.params.push_back(keymaster_param_enum(KM_TAG_ALGORITHM, 20013a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker KM_ALGORITHM_EC)); 20023a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker break; 20033a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker default: 20043a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("Unsupported key type %d", type); 20053a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::SYSTEM_ERROR; 20063a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 20073a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker int32_t rc = importKey(name, params, KM_KEY_FORMAT_PKCS8, data, length, targetUid, flags, 20083a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker /*outCharacteristics*/ NULL); 20093a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (rc != ::NO_ERROR) { 20103a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("importKey failed: %d", rc); 201107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 20123a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return translateResultToLegacyResult(rc); 20133a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 201470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 20153a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker int32_t sign(const String16& name, const uint8_t* data, size_t length, uint8_t** out, 20163a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker size_t* outLength) { 20173a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (!checkBinderPermission(P_SIGN)) { 20183a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::PERMISSION_DENIED; 20193a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 20203a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return doLegacySignVerify(name, data, length, out, outLength, NULL, 0, KM_PURPOSE_SIGN); 202170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 202270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 202307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t verify(const String16& name, const uint8_t* data, size_t dataLength, 202407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const uint8_t* signature, size_t signatureLength) { 20259489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_VERIFY)) { 202607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 202707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 20283a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return doLegacySignVerify(name, data, dataLength, NULL, NULL, signature, signatureLength, 20293a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker KM_PURPOSE_VERIFY); 203070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 203170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 203207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root /* 203307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * TODO: The abstraction between things stored in hardware and regular blobs 203407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * of data stored on the filesystem should be moved down to keystore itself. 203507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * Unfortunately the Java code that calls this has naming conventions that it 203607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * knows about. Ideally keystore shouldn't be used to store random blobs of 203707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * data. 203807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * 203907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * Until that happens, it's necessary to have a separate "get_pubkey" and 204007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * "del_key" since the Java code doesn't really communicate what it's 204107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * intentions are. 204207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root */ 204307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t get_pubkey(const String16& name, uint8_t** pubkey, size_t* pubkeyLength) { 20443a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ExportResult result; 20453a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker exportKey(name, KM_KEY_FORMAT_X509, NULL, NULL, &result); 20463a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (result.resultCode != ::NO_ERROR) { 20473a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("export failed: %d", result.resultCode); 20483a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return translateResultToLegacyResult(result.resultCode); 204907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 2050344e0bc23ca46b9acec97ac8bcd87949bde0ccabKenny Root 20513a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker *pubkey = result.exportData.release(); 20523a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker *pubkeyLength = result.dataLength; 205307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 2054344e0bc23ca46b9acec97ac8bcd87949bde0ccabKenny Root } 2055344e0bc23ca46b9acec97ac8bcd87949bde0ccabKenny Root 205607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t grant(const String16& name, int32_t granteeUid) { 2057d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 20589489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker int32_t result = checkBinderPermissionAndKeystoreState(P_GRANT); 20599489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (result != ::NO_ERROR) { 20609489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return result; 206107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 206207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 206307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 2064655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, callingUid)); 206507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2066655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(filename.string(), R_OK) == -1) { 206707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return (errno != ENOENT) ? ::SYSTEM_ERROR : ::KEY_NOT_FOUND; 206807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 206907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2070655b958eb2180c7c06889f83f606d23421bf038cKenny Root mKeyStore->addGrant(filename.string(), granteeUid); 207107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 2072a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 207307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 207407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t ungrant(const String16& name, int32_t granteeUid) { 2075d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 20769489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker int32_t result = checkBinderPermissionAndKeystoreState(P_GRANT); 20779489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (result != ::NO_ERROR) { 20789489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return result; 207907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 208007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 208107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 2082655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, callingUid)); 208307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2084655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(filename.string(), R_OK) == -1) { 208507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return (errno != ENOENT) ? ::SYSTEM_ERROR : ::KEY_NOT_FOUND; 208607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 208707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2088655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mKeyStore->removeGrant(filename.string(), granteeUid) ? ::NO_ERROR : ::KEY_NOT_FOUND; 2089a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 209007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 209107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int64_t getmtime(const String16& name) { 2092d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 20939489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_GET)) { 2094d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: getmtime", callingUid); 209536a9e231e03734cd2143383d26388455c1764e17Kenny Root return -1L; 209607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 209707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 209807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 2099655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, callingUid)); 210007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2101655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(filename.string(), R_OK) == -1) { 2102655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("could not access %s for getmtime", filename.string()); 210336a9e231e03734cd2143383d26388455c1764e17Kenny Root return -1L; 2104a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 210507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2106655b958eb2180c7c06889f83f606d23421bf038cKenny Root int fd = TEMP_FAILURE_RETRY(open(filename.string(), O_NOFOLLOW, O_RDONLY)); 210707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (fd < 0) { 2108655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("could not open %s for getmtime", filename.string()); 210936a9e231e03734cd2143383d26388455c1764e17Kenny Root return -1L; 211007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 211107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 211207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root struct stat s; 211307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int ret = fstat(fd, &s); 211407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root close(fd); 211507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (ret == -1) { 2116655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("could not stat %s for getmtime", filename.string()); 211736a9e231e03734cd2143383d26388455c1764e17Kenny Root return -1L; 211807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 211907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 212036a9e231e03734cd2143383d26388455c1764e17Kenny Root return static_cast<int64_t>(s.st_mtime); 2121a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 212207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2123d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root int32_t duplicate(const String16& srcKey, int32_t srcUid, const String16& destKey, 2124d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root int32_t destUid) { 21250225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 2126eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 2127eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_DUPLICATE, spid)) { 2128d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root ALOGW("permission denied for %d: duplicate", callingUid); 21290225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root return -1L; 21300225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 21310225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 213272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker State state = mKeyStore->getState(get_user_id(callingUid)); 21330225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root if (!isKeystoreUnlocked(state)) { 2134d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root ALOGD("calling duplicate in state: %d", state); 21350225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root return state; 21360225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 21370225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2138d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (srcUid == -1 || static_cast<uid_t>(srcUid) == callingUid) { 2139d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root srcUid = callingUid; 2140d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root } else if (!is_granted_to(callingUid, srcUid)) { 2141d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root ALOGD("migrate not granted from source: %d -> %d", callingUid, srcUid); 21420225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root return ::PERMISSION_DENIED; 21430225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 21440225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2145d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (destUid == -1) { 2146d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root destUid = callingUid; 2147d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root } 21480225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2149d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (srcUid != destUid) { 2150d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (static_cast<uid_t>(srcUid) != callingUid) { 2151d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root ALOGD("can only duplicate from caller to other or to same uid: " 2152d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root "calling=%d, srcUid=%d, destUid=%d", callingUid, srcUid, destUid); 2153d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root return ::PERMISSION_DENIED; 2154d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root } 21550225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2156d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (!is_granted_to(callingUid, destUid)) { 2157d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root ALOGD("duplicate not granted to dest: %d -> %d", callingUid, destUid); 2158d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root return ::PERMISSION_DENIED; 2159d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root } 21600225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 21610225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2162d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root String8 source8(srcKey); 2163655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 sourceFile(mKeyStore->getKeyNameForUidWithDir(source8, srcUid)); 2164d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root 2165d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root String8 target8(destKey); 2166fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root String8 targetFile(mKeyStore->getKeyNameForUidWithDir(target8, destUid)); 21670225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2168655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(targetFile.string(), W_OK) != -1 || errno != ENOENT) { 2169655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGD("destination already exists: %s", targetFile.string()); 21700225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root return ::SYSTEM_ERROR; 21710225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 21720225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2173d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root Blob keyBlob; 2174655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode responseCode = mKeyStore->get(sourceFile.string(), &keyBlob, TYPE_ANY, 217572593ee807e89239d98ae08d32c733ecc08203baChad Brubaker get_user_id(srcUid)); 2176d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (responseCode != ::NO_ERROR) { 2177d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root return responseCode; 21780225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 2179d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root 218072593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->put(targetFile.string(), &keyBlob, get_user_id(destUid)); 21810225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 21820225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 21831b0e3933900c7ea21189704d5db64e7346aee7afKenny Root int32_t is_hardware_backed(const String16& keyType) { 21841b0e3933900c7ea21189704d5db64e7346aee7afKenny Root return mKeyStore->isHardwareBacked(keyType) ? 1 : 0; 21858ddf35a6e1fd80a7d0685041d2bfc77078277c9dKenny Root } 21868ddf35a6e1fd80a7d0685041d2bfc77078277c9dKenny Root 2187fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root int32_t clear_uid(int64_t targetUid64) { 21889489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker uid_t targetUid = getEffectiveUid(targetUid64); 2189b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker if (!checkBinderPermissionSelfOrSystem(P_CLEAR_UID, targetUid)) { 2190a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root return ::PERMISSION_DENIED; 2191a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root } 2192a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root 21934b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee String8 prefix = String8::format("%u_", targetUid); 21944b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee Vector<String16> aliases; 2195e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker if (mKeyStore->list(prefix, &aliases, get_user_id(targetUid)) != ::NO_ERROR) { 2196a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root return ::SYSTEM_ERROR; 2197a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root } 2198a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root 21994b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee for (uint32_t i = 0; i < aliases.size(); i++) { 22004b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee String8 name8(aliases[i]); 22014b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid)); 220272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker mKeyStore->del(filename.string(), ::TYPE_ANY, get_user_id(targetUid)); 2203a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root } 22044b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return ::NO_ERROR; 2205a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root } 2206a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root 22079c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker int32_t addRngEntropy(const uint8_t* data, size_t dataLength) { 22089c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker const keymaster1_device_t* device = mKeyStore->getDevice(); 22099c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker const keymaster1_device_t* fallback = mKeyStore->getFallbackDevice(); 22109c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker int32_t devResult = KM_ERROR_UNIMPLEMENTED; 22119c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker int32_t fallbackResult = KM_ERROR_UNIMPLEMENTED; 22129c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker if (device->common.module->module_api_version >= KEYMASTER_MODULE_API_VERSION_1_0 && 22139c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker device->add_rng_entropy != NULL) { 22149c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker devResult = device->add_rng_entropy(device, data, dataLength); 22159c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker } 22169c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker if (fallback->add_rng_entropy) { 22179c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker fallbackResult = fallback->add_rng_entropy(fallback, data, dataLength); 22189c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker } 22199c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker if (devResult) { 22209c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker return devResult; 22219c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker } 22229c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker if (fallbackResult) { 22239c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker return fallbackResult; 22249c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker } 22259c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker return ::NO_ERROR; 22269899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker } 22279899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker 222817d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker int32_t generateKey(const String16& name, const KeymasterArguments& params, 2229154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker const uint8_t* entropy, size_t entropyLength, int uid, int flags, 2230154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker KeyCharacteristics* outCharacteristics) { 22319489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker uid = getEffectiveUid(uid); 22329489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker int rc = checkBinderPermissionAndKeystoreState(P_INSERT, uid, 22339489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker flags & KEYSTORE_FLAG_ENCRYPTED); 22349489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (rc != ::NO_ERROR) { 22359489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return rc; 223617d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 223717d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker 22389489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker rc = KM_ERROR_UNIMPLEMENTED; 223917d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker bool isFallback = false; 224017d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker keymaster_key_blob_t blob; 224117d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker keymaster_key_characteristics_t *out = NULL; 224217d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker 224317d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker const keymaster1_device_t* device = mKeyStore->getDevice(); 224417d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker const keymaster1_device_t* fallback = mKeyStore->getFallbackDevice(); 224557e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker std::vector<keymaster_key_param_t> opParams(params.params); 224657e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker const keymaster_key_param_set_t inParams = {opParams.data(), opParams.size()}; 224717d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker if (device == NULL) { 224817d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker return ::SYSTEM_ERROR; 224917d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 2250154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker // TODO: Seed from Linux RNG before this. 225117d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker if (device->common.module->module_api_version >= KEYMASTER_MODULE_API_VERSION_1_0 && 225217d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker device->generate_key != NULL) { 2253154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker if (!entropy) { 2254154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker rc = KM_ERROR_OK; 2255154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } else if (device->add_rng_entropy) { 2256154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker rc = device->add_rng_entropy(device, entropy, entropyLength); 2257154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } else { 2258154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker rc = KM_ERROR_UNIMPLEMENTED; 2259154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } 2260154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker if (rc == KM_ERROR_OK) { 226157e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker rc = device->generate_key(device, &inParams, &blob, &out); 2262154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } 226317d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 226417d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker // If the HW device didn't support generate_key or generate_key failed 226517d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker // fall back to the software implementation. 226617d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker if (rc && fallback->generate_key != NULL) { 226717d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker isFallback = true; 2268154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker if (!entropy) { 2269154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker rc = KM_ERROR_OK; 2270154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } else if (fallback->add_rng_entropy) { 2271154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker rc = fallback->add_rng_entropy(fallback, entropy, entropyLength); 2272154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } else { 2273154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker rc = KM_ERROR_UNIMPLEMENTED; 2274154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } 2275154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker if (rc == KM_ERROR_OK) { 227657e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker rc = fallback->generate_key(fallback, &inParams, &blob, &out); 2277154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } 227817d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 227917d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker 228017d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker if (out) { 228117d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker if (outCharacteristics) { 228217d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker outCharacteristics->characteristics = *out; 228317d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } else { 228417d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker keymaster_free_characteristics(out); 228517d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 228617d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker free(out); 228717d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 228817d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker 228917d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker if (rc) { 229017d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker return rc; 229117d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 229217d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker 229317d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker String8 name8(name); 229417d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, uid)); 229517d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker 229617d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker Blob keyBlob(blob.key_material, blob.key_material_size, NULL, 0, ::TYPE_KEYMASTER_10); 229717d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker keyBlob.setFallback(isFallback); 229817d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker keyBlob.setEncrypted(flags & KEYSTORE_FLAG_ENCRYPTED); 229917d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker 230017d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker free(const_cast<uint8_t*>(blob.key_material)); 230117d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker 230272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->put(filename.string(), &keyBlob, get_user_id(uid)); 23039899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker } 23049899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker 2305f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker int32_t getKeyCharacteristics(const String16& name, 2306d663442b590b59250062335cc057478001b8e439Chad Brubaker const keymaster_blob_t* clientId, 2307d663442b590b59250062335cc057478001b8e439Chad Brubaker const keymaster_blob_t* appData, 2308f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker KeyCharacteristics* outCharacteristics) { 2309f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker if (!outCharacteristics) { 2310f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker return KM_ERROR_UNEXPECTED_NULL_POINTER; 2311f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker } 2312f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker 2313f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker uid_t callingUid = IPCThreadState::self()->getCallingUid(); 2314f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker 2315f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker Blob keyBlob; 2316f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker String8 name8(name); 2317f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker int rc; 2318f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker 2319f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker ResponseCode responseCode = mKeyStore->getKeyForName(&keyBlob, name8, callingUid, 2320f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker TYPE_KEYMASTER_10); 2321f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker if (responseCode != ::NO_ERROR) { 2322f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker return responseCode; 2323f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker } 2324f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker keymaster_key_blob_t key; 2325f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker key.key_material_size = keyBlob.getLength(); 2326f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker key.key_material = keyBlob.getValue(); 2327f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker keymaster1_device_t* dev = mKeyStore->getDeviceForBlob(keyBlob); 2328f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker keymaster_key_characteristics_t *out = NULL; 2329f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker if (!dev->get_key_characteristics) { 2330f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker ALOGW("device does not implement get_key_characteristics"); 2331f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker return KM_ERROR_UNIMPLEMENTED; 2332f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker } 2333d663442b590b59250062335cc057478001b8e439Chad Brubaker rc = dev->get_key_characteristics(dev, &key, clientId, appData, &out); 2334f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker if (out) { 2335f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker outCharacteristics->characteristics = *out; 2336f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker free(out); 2337f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker } 2338f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker return rc ? rc : ::NO_ERROR; 23399899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker } 23409899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker 23414c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker int32_t importKey(const String16& name, const KeymasterArguments& params, 23424c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker keymaster_key_format_t format, const uint8_t *keyData, 23434c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker size_t keyLength, int uid, int flags, 23444c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker KeyCharacteristics* outCharacteristics) { 23459489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker uid = getEffectiveUid(uid); 23469489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker int rc = checkBinderPermissionAndKeystoreState(P_INSERT, uid, 23479489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker flags & KEYSTORE_FLAG_ENCRYPTED); 23489489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (rc != ::NO_ERROR) { 23499489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return rc; 23504c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker } 23514c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker 23529489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker rc = KM_ERROR_UNIMPLEMENTED; 23534c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker bool isFallback = false; 23544c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker keymaster_key_blob_t blob; 23554c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker keymaster_key_characteristics_t *out = NULL; 23564c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker 23574c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker const keymaster1_device_t* device = mKeyStore->getDevice(); 23584c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker const keymaster1_device_t* fallback = mKeyStore->getFallbackDevice(); 235957e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker std::vector<keymaster_key_param_t> opParams(params.params); 236057e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker const keymaster_key_param_set_t inParams = {opParams.data(), opParams.size()}; 236157e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker const keymaster_blob_t input = {keyData, keyLength}; 23624c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker if (device == NULL) { 23634c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker return ::SYSTEM_ERROR; 23644c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker } 23654c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker if (device->common.module->module_api_version >= KEYMASTER_MODULE_API_VERSION_1_0 && 23664c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker device->import_key != NULL) { 236757e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker rc = device->import_key(device, &inParams, format,&input, &blob, &out); 23684c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker } 23694c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker if (rc && fallback->import_key != NULL) { 23704c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker isFallback = true; 237157e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker rc = fallback->import_key(fallback, &inParams, format, &input, &blob, &out); 23724c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker } 23734c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker if (out) { 23744c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker if (outCharacteristics) { 23754c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker outCharacteristics->characteristics = *out; 23764c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker } else { 23774c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker keymaster_free_characteristics(out); 23784c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker } 23794c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker free(out); 23804c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker } 23814c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker if (rc) { 23824c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker return rc; 23834c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker } 23844c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker 23854c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker String8 name8(name); 23864c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, uid)); 23874c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker 23884c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker Blob keyBlob(blob.key_material, blob.key_material_size, NULL, 0, ::TYPE_KEYMASTER_10); 23894c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker keyBlob.setFallback(isFallback); 23904c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker keyBlob.setEncrypted(flags & KEYSTORE_FLAG_ENCRYPTED); 23914c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker 23924c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker free((void*) blob.key_material); 23934c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker 239472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->put(filename.string(), &keyBlob, get_user_id(uid)); 23959899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker } 23969899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker 239707b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker void exportKey(const String16& name, keymaster_key_format_t format, 2398d663442b590b59250062335cc057478001b8e439Chad Brubaker const keymaster_blob_t* clientId, 2399d663442b590b59250062335cc057478001b8e439Chad Brubaker const keymaster_blob_t* appData, ExportResult* result) { 240007b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker 240107b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker uid_t callingUid = IPCThreadState::self()->getCallingUid(); 240207b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker 240307b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker Blob keyBlob; 240407b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker String8 name8(name); 240507b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker int rc; 240607b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker 240707b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker ResponseCode responseCode = mKeyStore->getKeyForName(&keyBlob, name8, callingUid, 240807b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker TYPE_KEYMASTER_10); 240907b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker if (responseCode != ::NO_ERROR) { 241007b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker result->resultCode = responseCode; 241107b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker return; 241207b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker } 241307b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker keymaster_key_blob_t key; 241407b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker key.key_material_size = keyBlob.getLength(); 241507b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker key.key_material = keyBlob.getValue(); 241607b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker keymaster1_device_t* dev = mKeyStore->getDeviceForBlob(keyBlob); 241707b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker if (!dev->export_key) { 241807b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker result->resultCode = KM_ERROR_UNIMPLEMENTED; 241907b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker return; 242007b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker } 242157e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_blob_t output = {NULL, 0}; 242257e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker rc = dev->export_key(dev, format, &key, clientId, appData, &output); 242357e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->exportData.reset(const_cast<uint8_t*>(output.data)); 242457e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->dataLength = output.data_length; 242507b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker result->resultCode = rc ? rc : ::NO_ERROR; 24269899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker } 24279899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker 2428ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker 242940a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker void begin(const sp<IBinder>& appToken, const String16& name, keymaster_purpose_t purpose, 2430154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker bool pruneable, const KeymasterArguments& params, const uint8_t* entropy, 243157e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker size_t entropyLength, OperationResult* result) { 243240a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker uid_t callingUid = IPCThreadState::self()->getCallingUid(); 243340a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker if (!pruneable && get_app_id(callingUid) != AID_SYSTEM) { 243440a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker ALOGE("Non-system uid %d trying to start non-pruneable operation", callingUid); 243540a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->resultCode = ::PERMISSION_DENIED; 243640a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker return; 243740a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 24380cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (!checkAllowedOperationParams(params.params)) { 24390cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker result->resultCode = KM_ERROR_INVALID_ARGUMENT; 24400cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return; 24410cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 244240a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker Blob keyBlob; 244340a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker String8 name8(name); 244440a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker ResponseCode responseCode = mKeyStore->getKeyForName(&keyBlob, name8, callingUid, 244540a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker TYPE_KEYMASTER_10); 244640a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker if (responseCode != ::NO_ERROR) { 244740a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->resultCode = responseCode; 244840a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker return; 244940a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 245040a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker keymaster_key_blob_t key; 245140a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker key.key_material_size = keyBlob.getLength(); 245240a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker key.key_material = keyBlob.getValue(); 245340a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker keymaster_operation_handle_t handle; 245440a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker keymaster1_device_t* dev = mKeyStore->getDeviceForBlob(keyBlob); 2455154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker keymaster_error_t err = KM_ERROR_UNIMPLEMENTED; 245606801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker std::vector<keymaster_key_param_t> opParams(params.params); 2457ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker Unique_keymaster_key_characteristics characteristics; 2458ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker characteristics.reset(new keymaster_key_characteristics_t); 2459ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker err = getOperationCharacteristics(key, dev, opParams, characteristics.get()); 2460ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker if (err) { 2461ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker result->resultCode = err; 2462ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker return; 2463ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker } 24640cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const hw_auth_token_t* authToken = NULL; 2465b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden int32_t authResult = getAuthToken(characteristics.get(), 0, purpose, &authToken, 246606801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker /*failOnTokenMissing*/ false); 24670cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker // If per-operation auth is needed we need to begin the operation and 24680cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker // the client will need to authorize that operation before calling 24690cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker // update. Any other auth issues stop here. 24700cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (authResult != ::NO_ERROR && authResult != ::OP_AUTH_NEEDED) { 24710cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker result->resultCode = authResult; 247206801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker return; 247306801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker } 24740cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker addAuthToParams(&opParams, authToken); 2475154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker // Add entropy to the device first. 2476154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker if (entropy) { 2477154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker if (dev->add_rng_entropy) { 2478154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker err = dev->add_rng_entropy(dev, entropy, entropyLength); 2479154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } else { 2480154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker err = KM_ERROR_UNIMPLEMENTED; 2481154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } 2482154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker if (err) { 2483154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker result->resultCode = err; 2484154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker return; 2485154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } 2486154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } 248757e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_key_param_set_t inParams = {opParams.data(), opParams.size()}; 248840a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker 24899221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden // Create a keyid for this key. 24909221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::km_id_t keyid; 24919221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (!enforcement_policy.CreateKeyId(key, &keyid)) { 24929221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden ALOGE("Failed to create a key ID for authorization checking."); 24939221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden result->resultCode = KM_ERROR_UNKNOWN_ERROR; 24949221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden return; 24959221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden } 24969221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden 24979221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden // Check that all key authorization policy requirements are met. 24989221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::AuthorizationSet key_auths(characteristics->hw_enforced); 24999221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden key_auths.push_back(characteristics->sw_enforced); 25009221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::AuthorizationSet operation_params(inParams); 25019221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden err = enforcement_policy.AuthorizeOperation(purpose, keyid, key_auths, operation_params, 25029221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden 0 /* op_handle */, 25039221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden true /* is_begin_operation */); 25049221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (err) { 25059221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden result->resultCode = err; 25069221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden return; 25079221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden } 25089221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden 25094e88f9be2b3bb3dcea43f338532882681ee77352Alex Klyubin keymaster_key_param_set_t outParams = {NULL, 0}; 25104e88f9be2b3bb3dcea43f338532882681ee77352Alex Klyubin err = dev->begin(dev, purpose, &key, &inParams, &outParams, &handle); 25114e88f9be2b3bb3dcea43f338532882681ee77352Alex Klyubin 251240a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker // If there are too many operations abort the oldest operation that was 251340a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker // started as pruneable and try again. 251440a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker while (err == KM_ERROR_TOO_MANY_OPERATIONS && mOperationMap.hasPruneableOperation()) { 251540a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker sp<IBinder> oldest = mOperationMap.getOldestPruneableOperation(); 251640a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker ALOGD("Ran out of operation handles, trying to prune %p", oldest.get()); 2517700c1a35c52798831b8a8d76a042c4650c6d793fAlex Klyubin 2518700c1a35c52798831b8a8d76a042c4650c6d793fAlex Klyubin // We mostly ignore errors from abort() below because all we care about is whether at 2519700c1a35c52798831b8a8d76a042c4650c6d793fAlex Klyubin // least one pruneable operation has been removed. 2520700c1a35c52798831b8a8d76a042c4650c6d793fAlex Klyubin size_t op_count_before = mOperationMap.getPruneableOperationCount(); 2521700c1a35c52798831b8a8d76a042c4650c6d793fAlex Klyubin int abort_error = abort(oldest); 2522700c1a35c52798831b8a8d76a042c4650c6d793fAlex Klyubin size_t op_count_after = mOperationMap.getPruneableOperationCount(); 2523700c1a35c52798831b8a8d76a042c4650c6d793fAlex Klyubin if (op_count_after >= op_count_before) { 2524700c1a35c52798831b8a8d76a042c4650c6d793fAlex Klyubin // Failed to create space for a new operation. Bail to avoid an infinite loop. 2525700c1a35c52798831b8a8d76a042c4650c6d793fAlex Klyubin ALOGE("Failed to remove pruneable operation %p, error: %d", 2526700c1a35c52798831b8a8d76a042c4650c6d793fAlex Klyubin oldest.get(), abort_error); 252740a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker break; 252840a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 252957e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker err = dev->begin(dev, purpose, &key, &inParams, &outParams, &handle); 253040a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 253140a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker if (err) { 253240a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->resultCode = err; 253340a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker return; 253440a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 25359899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker 25369221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden sp<IBinder> operationToken = mOperationMap.addOperation(handle, keyid, purpose, dev, 25379221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden appToken, characteristics.release(), 253806801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker pruneable); 25390cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (authToken) { 25400cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker mOperationMap.setOperationAuthToken(operationToken, authToken); 25410cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 25420cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker // Return the authentication lookup result. If this is a per operation 25430cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker // auth'd key then the resultCode will be ::OP_AUTH_NEEDED and the 25440cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker // application should get an auth token using the handle before the 25450cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker // first call to update, which will fail if keystore hasn't received the 25460cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker // auth token. 25470cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker result->resultCode = authResult; 254840a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->token = operationToken; 2549c3a1856bbe2e39d5b3430f5f088b12fd710a159fChad Brubaker result->handle = handle; 255057e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker if (outParams.params) { 255157e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->outParams.params.assign(outParams.params, outParams.params + outParams.length); 255257e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker free(outParams.params); 255357e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker } 25549899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker } 25559899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker 255640a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker void update(const sp<IBinder>& token, const KeymasterArguments& params, const uint8_t* data, 255740a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker size_t dataLength, OperationResult* result) { 25580cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (!checkAllowedOperationParams(params.params)) { 25590cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker result->resultCode = KM_ERROR_INVALID_ARGUMENT; 25600cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return; 25610cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 256240a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker const keymaster1_device_t* dev; 256340a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker keymaster_operation_handle_t handle; 2564b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden keymaster_purpose_t purpose; 25659221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::km_id_t keyid; 25669221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden const keymaster_key_characteristics_t* characteristics; 25679221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (!mOperationMap.getOperation(token, &handle, &keyid, &purpose, &dev, &characteristics)) { 256840a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->resultCode = KM_ERROR_INVALID_OPERATION_HANDLE; 256940a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker return; 257040a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 257106801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker std::vector<keymaster_key_param_t> opParams(params.params); 25720cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker int32_t authResult = addOperationAuthTokenIfNeeded(token, &opParams); 25730cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (authResult != ::NO_ERROR) { 257406801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker result->resultCode = authResult; 257506801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker return; 257606801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker } 257757e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_key_param_set_t inParams = {opParams.data(), opParams.size()}; 257857e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_blob_t input = {data, dataLength}; 257957e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker size_t consumed = 0; 258057e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_blob_t output = {NULL, 0}; 258157e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_key_param_set_t outParams = {NULL, 0}; 258257e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker 25839221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden // Check that all key authorization policy requirements are met. 25849221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::AuthorizationSet key_auths(characteristics->hw_enforced); 25859221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden key_auths.push_back(characteristics->sw_enforced); 25869221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::AuthorizationSet operation_params(inParams); 25879221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden result->resultCode = 25889221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden enforcement_policy.AuthorizeOperation(purpose, keyid, key_auths, 25899221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden operation_params, handle, 25909221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden false /* is_begin_operation */); 25919221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (result->resultCode) { 25929221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden return; 25939221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden } 25949221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden 259557e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_error_t err = dev->update(dev, handle, &inParams, &input, &consumed, &outParams, 259657e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker &output); 259757e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->data.reset(const_cast<uint8_t*>(output.data)); 259857e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->dataLength = output.data_length; 259940a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->inputConsumed = consumed; 260040a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->resultCode = err ? (int32_t) err : ::NO_ERROR; 260157e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker if (outParams.params) { 260257e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->outParams.params.assign(outParams.params, outParams.params + outParams.length); 260357e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker free(outParams.params); 260457e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker } 260540a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 260640a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker 260740a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker void finish(const sp<IBinder>& token, const KeymasterArguments& params, 26080d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker const uint8_t* signature, size_t signatureLength, 26090d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker const uint8_t* entropy, size_t entropyLength, OperationResult* result) { 26100cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (!checkAllowedOperationParams(params.params)) { 26110cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker result->resultCode = KM_ERROR_INVALID_ARGUMENT; 26120cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return; 26130cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 261440a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker const keymaster1_device_t* dev; 261540a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker keymaster_operation_handle_t handle; 2616b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden keymaster_purpose_t purpose; 26179221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::km_id_t keyid; 26189221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden const keymaster_key_characteristics_t* characteristics; 26199221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (!mOperationMap.getOperation(token, &handle, &keyid, &purpose, &dev, &characteristics)) { 262040a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->resultCode = KM_ERROR_INVALID_OPERATION_HANDLE; 262140a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker return; 262240a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 262306801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker std::vector<keymaster_key_param_t> opParams(params.params); 26240cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker int32_t authResult = addOperationAuthTokenIfNeeded(token, &opParams); 26250cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (authResult != ::NO_ERROR) { 262606801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker result->resultCode = authResult; 262706801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker return; 262806801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker } 26290d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker keymaster_error_t err; 26300d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker if (entropy) { 26310d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker if (dev->add_rng_entropy) { 26320d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker err = dev->add_rng_entropy(dev, entropy, entropyLength); 26330d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker } else { 26340d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker err = KM_ERROR_UNIMPLEMENTED; 26350d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker } 26360d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker if (err) { 26370d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker result->resultCode = err; 26380d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker return; 26390d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker } 26400d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker } 26410cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker 264257e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_key_param_set_t inParams = {opParams.data(), opParams.size()}; 264357e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_blob_t input = {signature, signatureLength}; 264457e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_blob_t output = {NULL, 0}; 264557e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_key_param_set_t outParams = {NULL, 0}; 26469221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden 26479221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden // Check that all key authorization policy requirements are met. 26489221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::AuthorizationSet key_auths(characteristics->hw_enforced); 26499221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden key_auths.push_back(characteristics->sw_enforced); 26509221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::AuthorizationSet operation_params(inParams); 26519221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden err = enforcement_policy.AuthorizeOperation(purpose, keyid, key_auths, operation_params, 26529221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden handle, false /* is_begin_operation */); 26539221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (err) { 26549221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden result->resultCode = err; 26559221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden return; 26569221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden } 26579221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden 26580d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker err = dev->finish(dev, handle, &inParams, &input, &outParams, &output); 265940a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker // Remove the operation regardless of the result 266040a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker mOperationMap.removeOperation(token); 266106801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker mAuthTokenTable.MarkCompleted(handle); 266257e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker 266357e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->data.reset(const_cast<uint8_t*>(output.data)); 266457e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->dataLength = output.data_length; 266540a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->resultCode = err ? (int32_t) err : ::NO_ERROR; 266657e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker if (outParams.params) { 266757e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->outParams.params.assign(outParams.params, outParams.params + outParams.length); 266857e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker free(outParams.params); 266957e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker } 267040a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 267140a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker 267240a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker int32_t abort(const sp<IBinder>& token) { 267340a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker const keymaster1_device_t* dev; 267440a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker keymaster_operation_handle_t handle; 2675b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden keymaster_purpose_t purpose; 26769221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::km_id_t keyid; 26779221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (!mOperationMap.getOperation(token, &handle, &keyid, &purpose, &dev, NULL)) { 267840a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker return KM_ERROR_INVALID_OPERATION_HANDLE; 267940a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 268040a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker mOperationMap.removeOperation(token); 268106801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker int32_t rc; 268240a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker if (!dev->abort) { 268306801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker rc = KM_ERROR_UNIMPLEMENTED; 268406801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker } else { 268506801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker rc = dev->abort(dev, handle); 268640a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 268706801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker mAuthTokenTable.MarkCompleted(handle); 268840a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker if (rc) { 268940a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker return rc; 269040a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 269140a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker return ::NO_ERROR; 26929899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker } 26939899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker 26942ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker bool isOperationAuthorized(const sp<IBinder>& token) { 26952ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker const keymaster1_device_t* dev; 26962ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker keymaster_operation_handle_t handle; 2697ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker const keymaster_key_characteristics_t* characteristics; 2698b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden keymaster_purpose_t purpose; 26999221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::km_id_t keyid; 27009221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (!mOperationMap.getOperation(token, &handle, &keyid, &purpose, &dev, &characteristics)) { 27012ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker return false; 27022ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker } 27030cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const hw_auth_token_t* authToken = NULL; 27040cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker mOperationMap.getOperationAuthToken(token, &authToken); 270506801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker std::vector<keymaster_key_param_t> ignored; 27060cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker int32_t authResult = addOperationAuthTokenIfNeeded(token, &ignored); 27070cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return authResult == ::NO_ERROR; 27082ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker } 27092ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker 2710d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker int32_t addAuthToken(const uint8_t* token, size_t length) { 27119489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_ADD_AUTH)) { 27129489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker ALOGW("addAuthToken: permission denied for %d", 27139489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker IPCThreadState::self()->getCallingUid()); 2714d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker return ::PERMISSION_DENIED; 2715d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker } 2716d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker if (length != sizeof(hw_auth_token_t)) { 2717d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker return KM_ERROR_INVALID_ARGUMENT; 2718d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker } 2719d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker hw_auth_token_t* authToken = new hw_auth_token_t; 2720d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker memcpy(reinterpret_cast<void*>(authToken), token, sizeof(hw_auth_token_t)); 2721d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker // The table takes ownership of authToken. 2722d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker mAuthTokenTable.AddAuthenticationToken(authToken); 2723d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker return ::NO_ERROR; 27242ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker } 27252ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker 272607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootprivate: 27279489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker static const int32_t UID_SELF = -1; 27289489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker 27299489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker /** 27309489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * Get the effective target uid for a binder operation that takes an 27319489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * optional uid as the target. 27329489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker */ 27339489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker inline uid_t getEffectiveUid(int32_t targetUid) { 27349489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (targetUid == UID_SELF) { 27359489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return IPCThreadState::self()->getCallingUid(); 27369489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 27379489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return static_cast<uid_t>(targetUid); 27389489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 27399489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker 27409489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker /** 27419489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * Check if the caller of the current binder method has the required 27429489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * permission and if acting on other uids the grants to do so. 27439489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker */ 27449489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker inline bool checkBinderPermission(perm_t permission, int32_t targetUid = UID_SELF) { 27459489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker uid_t callingUid = IPCThreadState::self()->getCallingUid(); 27469489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker pid_t spid = IPCThreadState::self()->getCallingPid(); 27479489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!has_permission(callingUid, permission, spid)) { 27489489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker ALOGW("permission %s denied for %d", get_perm_label(permission), callingUid); 27499489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return false; 27509489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 27519489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!is_granted_to(callingUid, getEffectiveUid(targetUid))) { 27529489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker ALOGW("uid %d not granted to act for %d", callingUid, targetUid); 27539489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return false; 27549489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 27559489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return true; 27569489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 27579489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker 27589489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker /** 27599489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * Check if the caller of the current binder method has the required 2760b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker * permission and the target uid is the caller or the caller is system. 2761b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker */ 2762b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker inline bool checkBinderPermissionSelfOrSystem(perm_t permission, int32_t targetUid) { 2763b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker uid_t callingUid = IPCThreadState::self()->getCallingUid(); 2764b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker pid_t spid = IPCThreadState::self()->getCallingPid(); 2765b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker if (!has_permission(callingUid, permission, spid)) { 2766b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker ALOGW("permission %s denied for %d", get_perm_label(permission), callingUid); 2767b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker return false; 2768b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker } 2769b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker return getEffectiveUid(targetUid) == callingUid || callingUid == AID_SYSTEM; 2770b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker } 2771b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker 2772b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker /** 2773b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker * Check if the caller of the current binder method has the required 27749489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * permission or the target of the operation is the caller's uid. This is 27759489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * for operation where the permission is only for cross-uid activity and all 27769489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * uids are allowed to act on their own (ie: clearing all entries for a 27779489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * given uid). 27789489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker */ 27799489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker inline bool checkBinderPermissionOrSelfTarget(perm_t permission, int32_t targetUid) { 27809489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker uid_t callingUid = IPCThreadState::self()->getCallingUid(); 27819489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (getEffectiveUid(targetUid) == callingUid) { 27829489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return true; 27839489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } else { 27849489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return checkBinderPermission(permission, targetUid); 27859489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 27869489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 27879489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker 27889489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker /** 27899489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * Helper method to check that the caller has the required permission as 27909489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * well as the keystore is in the unlocked state if checkUnlocked is true. 27919489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * 27929489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * Returns NO_ERROR on success, PERMISSION_DENIED on a permission error and 27939489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * otherwise the state of keystore when not unlocked and checkUnlocked is 27949489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * true. 27959489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker */ 27969489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker inline int32_t checkBinderPermissionAndKeystoreState(perm_t permission, int32_t targetUid = -1, 27979489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker bool checkUnlocked = true) { 27989489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(permission, targetUid)) { 27999489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return ::PERMISSION_DENIED; 28009489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 280172593ee807e89239d98ae08d32c733ecc08203baChad Brubaker State state = mKeyStore->getState(get_user_id(getEffectiveUid(targetUid))); 28029489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (checkUnlocked && !isKeystoreUnlocked(state)) { 28039489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return state; 28049489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 28059489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker 28069489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return ::NO_ERROR; 28079489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker 28089489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 28099489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker 28109d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root inline bool isKeystoreUnlocked(State state) { 28119d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root switch (state) { 28129d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root case ::STATE_NO_ERROR: 28139d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root return true; 28149d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root case ::STATE_UNINITIALIZED: 28159d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root case ::STATE_LOCKED: 28169d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root return false; 28179d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root } 28189d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root return false; 2819a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 282007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 282167d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker bool isKeyTypeSupported(const keymaster1_device_t* device, keymaster_keypair_t keyType) { 28221d448c074a86ef5d05a22fdf1358718976628a86Kenny Root const int32_t device_api = device->common.module->module_api_version; 28231d448c074a86ef5d05a22fdf1358718976628a86Kenny Root if (device_api == KEYMASTER_MODULE_API_VERSION_0_2) { 28241d448c074a86ef5d05a22fdf1358718976628a86Kenny Root switch (keyType) { 28251d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_RSA: 28261d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_DSA: 28271d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_EC: 28281d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return true; 28291d448c074a86ef5d05a22fdf1358718976628a86Kenny Root default: 28301d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return false; 28311d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } 28321d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } else if (device_api >= KEYMASTER_MODULE_API_VERSION_0_3) { 28331d448c074a86ef5d05a22fdf1358718976628a86Kenny Root switch (keyType) { 28341d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_RSA: 28351d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return true; 28361d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_DSA: 28371d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return device->flags & KEYMASTER_SUPPORTS_DSA; 28381d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_EC: 28391d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return device->flags & KEYMASTER_SUPPORTS_EC; 28401d448c074a86ef5d05a22fdf1358718976628a86Kenny Root default: 28411d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return false; 28421d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } 28431d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } else { 28441d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return keyType == TYPE_RSA; 28451d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } 28461d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } 28471d448c074a86ef5d05a22fdf1358718976628a86Kenny Root 28480cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker /** 28490cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * Check that all keymaster_key_param_t's provided by the application are 28500cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * allowed. Any parameter that keystore adds itself should be disallowed here. 28510cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker */ 28520cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker bool checkAllowedOperationParams(const std::vector<keymaster_key_param_t>& params) { 28530cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker for (auto param: params) { 28540cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker switch (param.tag) { 28550cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker case KM_TAG_AUTH_TOKEN: 28560cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return false; 28570cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker default: 28580cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker break; 28590cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 28600cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 28610cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return true; 28620cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 28630cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker 28640cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker keymaster_error_t getOperationCharacteristics(const keymaster_key_blob_t& key, 28650cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const keymaster1_device_t* dev, 28660cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const std::vector<keymaster_key_param_t>& params, 28670cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker keymaster_key_characteristics_t* out) { 28680cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker UniquePtr<keymaster_blob_t> appId; 28690cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker UniquePtr<keymaster_blob_t> appData; 28700cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker for (auto param : params) { 28710cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (param.tag == KM_TAG_APPLICATION_ID) { 28720cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker appId.reset(new keymaster_blob_t); 28730cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker appId->data = param.blob.data; 28740cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker appId->data_length = param.blob.data_length; 28750cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } else if (param.tag == KM_TAG_APPLICATION_DATA) { 28760cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker appData.reset(new keymaster_blob_t); 28770cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker appData->data = param.blob.data; 28780cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker appData->data_length = param.blob.data_length; 28790cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 28800cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 28810cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker keymaster_key_characteristics_t* result = NULL; 28820cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (!dev->get_key_characteristics) { 28830cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return KM_ERROR_UNIMPLEMENTED; 28840cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 28850cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker keymaster_error_t error = dev->get_key_characteristics(dev, &key, appId.get(), 28860cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker appData.get(), &result); 28870cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (result) { 28880cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker *out = *result; 28890cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker free(result); 28900cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 28910cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return error; 28920cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 28930cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker 28940cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker /** 28950cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * Get the auth token for this operation from the auth token table. 28960cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * 28970cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * Returns ::NO_ERROR if the auth token was set or none was required. 28980cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * ::OP_AUTH_NEEDED if it is a per op authorization, no 28990cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * authorization token exists for that operation and 29000cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * failOnTokenMissing is false. 29010cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * KM_ERROR_KEY_USER_NOT_AUTHENTICATED if there is no valid auth 29020cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * token for the operation 29030cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker */ 29040cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker int32_t getAuthToken(const keymaster_key_characteristics_t* characteristics, 29050cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker keymaster_operation_handle_t handle, 2906b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden keymaster_purpose_t purpose, 29070cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const hw_auth_token_t** authToken, 29080cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker bool failOnTokenMissing = true) { 29090cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker 29100cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker std::vector<keymaster_key_param_t> allCharacteristics; 29110cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker for (size_t i = 0; i < characteristics->sw_enforced.length; i++) { 29120cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker allCharacteristics.push_back(characteristics->sw_enforced.params[i]); 29130cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 29140cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker for (size_t i = 0; i < characteristics->hw_enforced.length; i++) { 29150cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker allCharacteristics.push_back(characteristics->hw_enforced.params[i]); 29160cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 2917b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden keymaster::AuthTokenTable::Error err = mAuthTokenTable.FindAuthorization( 2918b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden allCharacteristics.data(), allCharacteristics.size(), purpose, handle, authToken); 29190cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker switch (err) { 29200cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker case keymaster::AuthTokenTable::OK: 29210cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker case keymaster::AuthTokenTable::AUTH_NOT_REQUIRED: 29220cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return ::NO_ERROR; 29230cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker case keymaster::AuthTokenTable::AUTH_TOKEN_NOT_FOUND: 29240cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker case keymaster::AuthTokenTable::AUTH_TOKEN_EXPIRED: 29250cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker case keymaster::AuthTokenTable::AUTH_TOKEN_WRONG_SID: 29260cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return KM_ERROR_KEY_USER_NOT_AUTHENTICATED; 29270cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker case keymaster::AuthTokenTable::OP_HANDLE_REQUIRED: 29280cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return failOnTokenMissing ? (int32_t) KM_ERROR_KEY_USER_NOT_AUTHENTICATED : 29290cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker (int32_t) ::OP_AUTH_NEEDED; 29300cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker default: 29310cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker ALOGE("Unexpected FindAuthorization return value %d", err); 29320cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return KM_ERROR_INVALID_ARGUMENT; 29330cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 29340cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 29350cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker 29360cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker inline void addAuthToParams(std::vector<keymaster_key_param_t>* params, 29370cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const hw_auth_token_t* token) { 29380cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (token) { 29390cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker params->push_back(keymaster_param_blob(KM_TAG_AUTH_TOKEN, 29400cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker reinterpret_cast<const uint8_t*>(token), 29410cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker sizeof(hw_auth_token_t))); 29420cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 29430cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 29440cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker 29450cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker /** 29460cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * Add the auth token for the operation to the param list if the operation 29470cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * requires authorization. Uses the cached result in the OperationMap if available 29480cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * otherwise gets the token from the AuthTokenTable and caches the result. 29490cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * 29500cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * Returns ::NO_ERROR if the auth token was added or not needed. 29510cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * KM_ERROR_KEY_USER_NOT_AUTHENTICATED if the operation is not 29520cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * authenticated. 29530cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * KM_ERROR_INVALID_OPERATION_HANDLE if token is not a valid 29540cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * operation token. 29550cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker */ 29560cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker int32_t addOperationAuthTokenIfNeeded(sp<IBinder> token, 29570cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker std::vector<keymaster_key_param_t>* params) { 29580cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const hw_auth_token_t* authToken = NULL; 29597169a8470f6539036addf3c960b075af224e83e2Chad Brubaker mOperationMap.getOperationAuthToken(token, &authToken); 29607169a8470f6539036addf3c960b075af224e83e2Chad Brubaker if (!authToken) { 29610cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const keymaster1_device_t* dev; 29620cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker keymaster_operation_handle_t handle; 29630cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const keymaster_key_characteristics_t* characteristics = NULL; 2964b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden keymaster_purpose_t purpose; 29659221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::km_id_t keyid; 29669221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (!mOperationMap.getOperation(token, &handle, &keyid, &purpose, &dev, 29679221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden &characteristics)) { 29680cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return KM_ERROR_INVALID_OPERATION_HANDLE; 29690cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 2970b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden int32_t result = getAuthToken(characteristics, handle, purpose, &authToken); 29710cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (result != ::NO_ERROR) { 29720cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return result; 29730cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 29740cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (authToken) { 29750cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker mOperationMap.setOperationAuthToken(token, authToken); 29760cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 29770cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 29780cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker addAuthToParams(params, authToken); 29790cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return ::NO_ERROR; 29800cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 29810cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker 29823a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker /** 29833a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker * Translate a result value to a legacy return value. All keystore errors are 29843a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker * preserved and keymaster errors become SYSTEM_ERRORs 29853a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker */ 29863a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker inline int32_t translateResultToLegacyResult(int32_t result) { 29873a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (result > 0) { 29883a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return result; 29893a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 29903a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::SYSTEM_ERROR; 29913a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 29923a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 29933a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker void addLegacyKeyAuthorizations(std::vector<keymaster_key_param_t>& params) { 29943a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_enum(KM_TAG_PURPOSE, KM_PURPOSE_SIGN)); 29953a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_enum(KM_TAG_PURPOSE, KM_PURPOSE_VERIFY)); 29963a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_enum(KM_TAG_PURPOSE, KM_PURPOSE_ENCRYPT)); 29973a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_enum(KM_TAG_PURPOSE, KM_PURPOSE_DECRYPT)); 29983a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_enum(KM_TAG_PADDING, KM_PAD_NONE)); 29993a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_enum(KM_TAG_DIGEST, KM_DIGEST_NONE)); 30003a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_bool(KM_TAG_ALL_USERS)); 30013a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_bool(KM_TAG_NO_AUTH_REQUIRED)); 30023a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_date(KM_TAG_ORIGINATION_EXPIRE_DATETIME, LLONG_MAX)); 30033a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_date(KM_TAG_USAGE_EXPIRE_DATETIME, LLONG_MAX)); 30043a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_date(KM_TAG_ACTIVE_DATETIME, 0)); 30053a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker uint64_t now = keymaster::java_time(time(NULL)); 30063a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_date(KM_TAG_CREATION_DATETIME, now)); 30073a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30083a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 30093a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker keymaster_key_param_t* getKeyAlgorithm(keymaster_key_characteristics_t* characteristics) { 30103a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker for (size_t i = 0; i < characteristics->hw_enforced.length; i++) { 30113a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (characteristics->hw_enforced.params[i].tag == KM_TAG_ALGORITHM) { 30123a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return &characteristics->hw_enforced.params[i]; 30133a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30143a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30153a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker for (size_t i = 0; i < characteristics->sw_enforced.length; i++) { 30163a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (characteristics->sw_enforced.params[i].tag == KM_TAG_ALGORITHM) { 30173a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return &characteristics->sw_enforced.params[i]; 30183a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30193a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30203a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return NULL; 30213a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30223a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 30233a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker void addLegacyBeginParams(const String16& name, std::vector<keymaster_key_param_t>& params) { 30243a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker // All legacy keys are DIGEST_NONE/PAD_NONE. 30253a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_enum(KM_TAG_DIGEST, KM_DIGEST_NONE)); 30263a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_enum(KM_TAG_PADDING, KM_PAD_NONE)); 30273a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 30283a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker // Look up the algorithm of the key. 30293a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker KeyCharacteristics characteristics; 30303a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker int32_t rc = getKeyCharacteristics(name, NULL, NULL, &characteristics); 30313a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (rc != ::NO_ERROR) { 30323a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGE("Failed to get key characteristics"); 30333a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return; 30343a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30353a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker keymaster_key_param_t* algorithm = getKeyAlgorithm(&characteristics.characteristics); 30363a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (!algorithm) { 30373a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGE("getKeyCharacteristics did not include KM_TAG_ALGORITHM"); 30383a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return; 30393a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30403a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(*algorithm); 30413a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30423a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 30433a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker int32_t doLegacySignVerify(const String16& name, const uint8_t* data, size_t length, 30443a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker uint8_t** out, size_t* outLength, const uint8_t* signature, 30453a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker size_t signatureLength, keymaster_purpose_t purpose) { 30463a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 30473a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker std::basic_stringstream<uint8_t> outBuffer; 30483a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker OperationResult result; 30493a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker KeymasterArguments inArgs; 30503a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker addLegacyBeginParams(name, inArgs.params); 30513a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker sp<IBinder> appToken(new BBinder); 30523a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker sp<IBinder> token; 30533a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 30543a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker begin(appToken, name, purpose, true, inArgs, NULL, 0, &result); 30553a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (result.resultCode != ResponseCode::NO_ERROR) { 3056df70517b8d85b30e6ac7001ec68348f07d5129cbChad Brubaker if (result.resultCode == ::KEY_NOT_FOUND) { 3057df70517b8d85b30e6ac7001ec68348f07d5129cbChad Brubaker ALOGW("Key not found"); 3058df70517b8d85b30e6ac7001ec68348f07d5129cbChad Brubaker } else { 3059df70517b8d85b30e6ac7001ec68348f07d5129cbChad Brubaker ALOGW("Error in begin: %d", result.resultCode); 3060df70517b8d85b30e6ac7001ec68348f07d5129cbChad Brubaker } 30613a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return translateResultToLegacyResult(result.resultCode); 30623a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30633a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker inArgs.params.clear(); 30643a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker token = result.token; 30653a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker size_t consumed = 0; 30663a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker size_t lastConsumed = 0; 30673a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker do { 30683a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker update(token, inArgs, data + consumed, length - consumed, &result); 30693a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (result.resultCode != ResponseCode::NO_ERROR) { 30703a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("Error in update: %d", result.resultCode); 30713a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return translateResultToLegacyResult(result.resultCode); 30723a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30733a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (out) { 30743a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker outBuffer.write(result.data.get(), result.dataLength); 30753a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30763a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker lastConsumed = result.inputConsumed; 30773a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker consumed += lastConsumed; 30783a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } while (consumed < length && lastConsumed > 0); 30793a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 30803a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (consumed != length) { 30813a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("Not all data consumed. Consumed %zu of %zu", consumed, length); 30823a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::SYSTEM_ERROR; 30833a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30843a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 30853a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker finish(token, inArgs, signature, signatureLength, NULL, 0, &result); 30863a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (result.resultCode != ResponseCode::NO_ERROR) { 30873a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("Error in finish: %d", result.resultCode); 30883a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return translateResultToLegacyResult(result.resultCode); 30893a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30903a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (out) { 30913a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker outBuffer.write(result.data.get(), result.dataLength); 30923a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30933a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 30943a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (out) { 30953a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker auto buf = outBuffer.str(); 30963a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker *out = new uint8_t[buf.size()]; 30973a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker memcpy(*out, buf.c_str(), buf.size()); 30983a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker *outLength = buf.size(); 30993a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 31003a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 31013a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::NO_ERROR; 31023a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 31033a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 310407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ::KeyStore* mKeyStore; 310540a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker OperationMap mOperationMap; 3106d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker keymaster::AuthTokenTable mAuthTokenTable; 31079221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden KeystoreKeymasterEnforcement enforcement_policy; 310807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root}; 310907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 311007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root}; // namespace android 3111a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 3112a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootint main(int argc, char* argv[]) { 3113a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (argc < 2) { 3114a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ALOGE("A directory must be specified!"); 3115a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return 1; 3116a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 3117a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (chdir(argv[1]) == -1) { 3118a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ALOGE("chdir: %s: %s", argv[1], strerror(errno)); 3119a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return 1; 3120a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 3121a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 3122a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root Entropy entropy; 3123a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (!entropy.open()) { 3124a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return 1; 3125a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 312670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 3127bd07a239085228c25898bc6cdece8b1b8758df83Chad Brubaker keymaster1_device_t* dev; 312870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root if (keymaster_device_initialize(&dev)) { 312970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root ALOGE("keystore keymaster could not be initialized; exiting"); 313070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return 1; 313170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 313270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 313367d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker keymaster1_device_t* fallback; 3134fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker if (fallback_keymaster_device_initialize(&fallback)) { 3135fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker ALOGE("software keymaster could not be initialized; exiting"); 3136fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker return 1; 3137fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker } 3138fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker 3139eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn ks_is_selinux_enabled = is_selinux_enabled(); 3140eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (ks_is_selinux_enabled) { 3141eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn union selinux_callback cb; 3142eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn cb.func_log = selinux_log_callback; 3143eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn selinux_set_callback(SELINUX_CB_LOG, cb); 3144eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (getcon(&tctx) != 0) { 3145eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn ALOGE("SELinux: Could not acquire target context. Aborting keystore.\n"); 3146eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn return -1; 3147eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } 3148eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } else { 3149eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn ALOGI("SELinux: Keystore SELinux is disabled.\n"); 3150eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } 3151eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 3152bd07a239085228c25898bc6cdece8b1b8758df83Chad Brubaker KeyStore keyStore(&entropy, dev, fallback); 3153655b958eb2180c7c06889f83f606d23421bf038cKenny Root keyStore.initialize(); 315407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root android::sp<android::IServiceManager> sm = android::defaultServiceManager(); 315507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root android::sp<android::KeyStoreProxy> proxy = new android::KeyStoreProxy(&keyStore); 315607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root android::status_t ret = sm->addService(android::String16("android.security.keystore"), proxy); 315707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (ret != android::OK) { 315807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ALOGE("Couldn't register binder service!"); 315907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return -1; 3160a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 316170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 316207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root /* 316307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * We're the only thread in existence, so we're just going to process 316407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * Binder transaction as a single-threaded program. 316507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root */ 316607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root android::IPCThreadState::self()->joinThreadPool(); 316770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 316807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root keymaster_device_release(dev); 3169a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return 1; 3170a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root} 3171