keystore.cpp revision 9221bff2f13451ef330135bb32ea96de2a8b09cc
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 672f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (isEncrypted() && (state != STATE_NO_ERROR)) { 673f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return LOCKED; 674f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 675f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 676a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t headerLength = (mBlob.encrypted - (uint8_t*) &mBlob); 677a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (fileLength < headerLength) { 678a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return VALUE_CORRUPTED; 679a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 680a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 681a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ssize_t encryptedLength = fileLength - (headerLength + mBlob.info); 682f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (encryptedLength < 0) { 683a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return VALUE_CORRUPTED; 684a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 685f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 686f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ssize_t digestedLength; 687f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (isEncrypted()) { 688f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (encryptedLength % AES_BLOCK_SIZE != 0) { 689f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return VALUE_CORRUPTED; 690f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 691f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 692f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root AES_cbc_encrypt(mBlob.encrypted, mBlob.encrypted, encryptedLength, aes_key, 693f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root mBlob.vector, AES_DECRYPT); 694f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root digestedLength = encryptedLength - MD5_DIGEST_LENGTH; 695f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root uint8_t computedDigest[MD5_DIGEST_LENGTH]; 696f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root MD5(mBlob.digested, digestedLength, computedDigest); 697f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (memcmp(mBlob.digest, computedDigest, MD5_DIGEST_LENGTH) != 0) { 698f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return VALUE_CORRUPTED; 699f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 700f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } else { 701f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root digestedLength = encryptedLength; 702a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 703a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 704a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ssize_t maxValueLength = digestedLength - sizeof(mBlob.length); 705a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root mBlob.length = ntohl(mBlob.length); 706a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (mBlob.length < 0 || mBlob.length > maxValueLength) { 707a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return VALUE_CORRUPTED; 708a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 709a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (mBlob.info != 0) { 710a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // move info from after padding to after data 711a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root memmove(&mBlob.value[mBlob.length], &mBlob.value[maxValueLength], mBlob.info); 712a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 71307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 714a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 715a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 716a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootprivate: 717a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root struct blob mBlob; 718a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root}; 719a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 720655b958eb2180c7c06889f83f606d23421bf038cKenny Rootclass UserState { 721655b958eb2180c7c06889f83f606d23421bf038cKenny Rootpublic: 722655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState(uid_t userId) : mUserId(userId), mRetry(MAX_RETRY) { 723655b958eb2180c7c06889f83f606d23421bf038cKenny Root asprintf(&mUserDir, "user_%u", mUserId); 724655b958eb2180c7c06889f83f606d23421bf038cKenny Root asprintf(&mMasterKeyFile, "%s/.masterkey", mUserDir); 725655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 72670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 727655b958eb2180c7c06889f83f606d23421bf038cKenny Root ~UserState() { 728655b958eb2180c7c06889f83f606d23421bf038cKenny Root free(mUserDir); 729655b958eb2180c7c06889f83f606d23421bf038cKenny Root free(mMasterKeyFile); 730655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 73170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 732655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool initialize() { 733655b958eb2180c7c06889f83f606d23421bf038cKenny Root if ((mkdir(mUserDir, S_IRUSR | S_IWUSR | S_IXUSR) < 0) && (errno != EEXIST)) { 734655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGE("Could not create directory '%s'", mUserDir); 735655b958eb2180c7c06889f83f606d23421bf038cKenny Root return false; 736655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 737655b958eb2180c7c06889f83f606d23421bf038cKenny Root 738655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(mMasterKeyFile, R_OK) == 0) { 739a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root setState(STATE_LOCKED); 740a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } else { 741a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root setState(STATE_UNINITIALIZED); 742a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 74370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 744655b958eb2180c7c06889f83f606d23421bf038cKenny Root return true; 745655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 746655b958eb2180c7c06889f83f606d23421bf038cKenny Root 747655b958eb2180c7c06889f83f606d23421bf038cKenny Root uid_t getUserId() const { 748655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mUserId; 749655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 750655b958eb2180c7c06889f83f606d23421bf038cKenny Root 751655b958eb2180c7c06889f83f606d23421bf038cKenny Root const char* getUserDirName() const { 752655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mUserDir; 753655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 754655b958eb2180c7c06889f83f606d23421bf038cKenny Root 755655b958eb2180c7c06889f83f606d23421bf038cKenny Root const char* getMasterKeyFileName() const { 756655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mMasterKeyFile; 757655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 758655b958eb2180c7c06889f83f606d23421bf038cKenny Root 759655b958eb2180c7c06889f83f606d23421bf038cKenny Root void setState(State state) { 760655b958eb2180c7c06889f83f606d23421bf038cKenny Root mState = state; 761655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (mState == STATE_NO_ERROR || mState == STATE_UNINITIALIZED) { 762655b958eb2180c7c06889f83f606d23421bf038cKenny Root mRetry = MAX_RETRY; 763655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 764a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 765a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 7665187818895c4c5f650a611c40531b1dff7764c18Kenny Root State getState() const { 767a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return mState; 768a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 769a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 7705187818895c4c5f650a611c40531b1dff7764c18Kenny Root int8_t getRetry() const { 771a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return mRetry; 772a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 773a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 774655b958eb2180c7c06889f83f606d23421bf038cKenny Root void zeroizeMasterKeysInMemory() { 775655b958eb2180c7c06889f83f606d23421bf038cKenny Root memset(mMasterKey, 0, sizeof(mMasterKey)); 776655b958eb2180c7c06889f83f606d23421bf038cKenny Root memset(mSalt, 0, sizeof(mSalt)); 777655b958eb2180c7c06889f83f606d23421bf038cKenny Root memset(&mMasterKeyEncryption, 0, sizeof(mMasterKeyEncryption)); 778655b958eb2180c7c06889f83f606d23421bf038cKenny Root memset(&mMasterKeyDecryption, 0, sizeof(mMasterKeyDecryption)); 77970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 78070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 78196d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker bool deleteMasterKey() { 78296d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker setState(STATE_UNINITIALIZED); 78396d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker zeroizeMasterKeysInMemory(); 78496d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker return unlink(mMasterKeyFile) == 0 || errno == ENOENT; 78596d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 78696d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker 787655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode initialize(const android::String8& pw, Entropy* entropy) { 788655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!generateMasterKey(entropy)) { 789a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 790a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 791655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode response = writeMasterKey(pw, entropy); 792a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (response != NO_ERROR) { 793a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return response; 794a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 795a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root setupMasterKeys(); 79607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 797a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 798a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 7994e865753346fc6a075966972a7a98051818859dbRobin Lee ResponseCode copyMasterKey(UserState* src) { 8004e865753346fc6a075966972a7a98051818859dbRobin Lee if (mState != STATE_UNINITIALIZED) { 8014e865753346fc6a075966972a7a98051818859dbRobin Lee return ::SYSTEM_ERROR; 8024e865753346fc6a075966972a7a98051818859dbRobin Lee } 8034e865753346fc6a075966972a7a98051818859dbRobin Lee if (src->getState() != STATE_NO_ERROR) { 8044e865753346fc6a075966972a7a98051818859dbRobin Lee return ::SYSTEM_ERROR; 8054e865753346fc6a075966972a7a98051818859dbRobin Lee } 8064e865753346fc6a075966972a7a98051818859dbRobin Lee memcpy(mMasterKey, src->mMasterKey, MASTER_KEY_SIZE_BYTES); 8074e865753346fc6a075966972a7a98051818859dbRobin Lee setupMasterKeys(); 8084e865753346fc6a075966972a7a98051818859dbRobin Lee return ::NO_ERROR; 8094e865753346fc6a075966972a7a98051818859dbRobin Lee } 8104e865753346fc6a075966972a7a98051818859dbRobin Lee 811655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode writeMasterKey(const android::String8& pw, Entropy* entropy) { 812a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root uint8_t passwordKey[MASTER_KEY_SIZE_BYTES]; 813a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root generateKeyFromPassword(passwordKey, MASTER_KEY_SIZE_BYTES, pw, mSalt); 814a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root AES_KEY passwordAesKey; 815a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root AES_set_encrypt_key(passwordKey, MASTER_KEY_SIZE_BITS, &passwordAesKey); 816822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root Blob masterKeyBlob(mMasterKey, sizeof(mMasterKey), mSalt, sizeof(mSalt), TYPE_MASTER_KEY); 817f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return masterKeyBlob.writeBlob(mMasterKeyFile, &passwordAesKey, STATE_NO_ERROR, entropy); 818a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 819a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 820655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode readMasterKey(const android::String8& pw, Entropy* entropy) { 821655b958eb2180c7c06889f83f606d23421bf038cKenny Root int in = TEMP_FAILURE_RETRY(open(mMasterKeyFile, O_RDONLY)); 822150ca934edb745de3666a6492b039900df228ff0Kenny Root if (in < 0) { 823a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 824a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 825a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 826a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // we read the raw blob to just to get the salt to generate 827a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // the AES key, then we create the Blob to use with decryptBlob 828a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root blob rawBlob; 829a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t length = readFully(in, (uint8_t*) &rawBlob, sizeof(rawBlob)); 830a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (close(in) != 0) { 831a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 832a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 833a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // find salt at EOF if present, otherwise we have an old file 834a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root uint8_t* salt; 835a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (length > SALT_SIZE && rawBlob.info == SALT_SIZE) { 836a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root salt = (uint8_t*) &rawBlob + length - SALT_SIZE; 837a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } else { 838a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root salt = NULL; 839a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 840a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root uint8_t passwordKey[MASTER_KEY_SIZE_BYTES]; 841a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root generateKeyFromPassword(passwordKey, MASTER_KEY_SIZE_BYTES, pw, salt); 842a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root AES_KEY passwordAesKey; 843a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root AES_set_decrypt_key(passwordKey, MASTER_KEY_SIZE_BITS, &passwordAesKey); 844a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root Blob masterKeyBlob(rawBlob); 845f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ResponseCode response = masterKeyBlob.readBlob(mMasterKeyFile, &passwordAesKey, 846f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root STATE_NO_ERROR); 847a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (response == SYSTEM_ERROR) { 848f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return response; 849a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 850a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (response == NO_ERROR && masterKeyBlob.getLength() == MASTER_KEY_SIZE_BYTES) { 851a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // if salt was missing, generate one and write a new master key file with the salt. 852a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (salt == NULL) { 853655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!generateSalt(entropy)) { 854a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 855a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 856655b958eb2180c7c06889f83f606d23421bf038cKenny Root response = writeMasterKey(pw, entropy); 857a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 858a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (response == NO_ERROR) { 859a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root memcpy(mMasterKey, masterKeyBlob.getValue(), MASTER_KEY_SIZE_BYTES); 860a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root setupMasterKeys(); 861a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 862a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return response; 863a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 864a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (mRetry <= 0) { 865a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root reset(); 866a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return UNINITIALIZED; 867a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 868a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root --mRetry; 869a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root switch (mRetry) { 870a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root case 0: return WRONG_PASSWORD_0; 871a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root case 1: return WRONG_PASSWORD_1; 872a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root case 2: return WRONG_PASSWORD_2; 873a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root case 3: return WRONG_PASSWORD_3; 874a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root default: return WRONG_PASSWORD_3; 875a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 876a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 877a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 878655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_KEY* getEncryptionKey() { 879655b958eb2180c7c06889f83f606d23421bf038cKenny Root return &mMasterKeyEncryption; 880655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 881a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 882655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_KEY* getDecryptionKey() { 883655b958eb2180c7c06889f83f606d23421bf038cKenny Root return &mMasterKeyDecryption; 884655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 885a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 886655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool reset() { 887655b958eb2180c7c06889f83f606d23421bf038cKenny Root DIR* dir = opendir(getUserDirName()); 888a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (!dir) { 88996d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker // If the directory doesn't exist then nothing to do. 89096d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if (errno == ENOENT) { 89196d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker return true; 89296d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 893655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("couldn't open user directory: %s", strerror(errno)); 894a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return false; 895a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 896655b958eb2180c7c06889f83f606d23421bf038cKenny Root 897655b958eb2180c7c06889f83f606d23421bf038cKenny Root struct dirent* file; 898a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root while ((file = readdir(dir)) != NULL) { 89996d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker // skip . and .. 90096d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if (!strcmp(".", file->d_name) || !strcmp("..", file->d_name)) { 901655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 902655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 903655b958eb2180c7c06889f83f606d23421bf038cKenny Root 904655b958eb2180c7c06889f83f606d23421bf038cKenny Root unlinkat(dirfd(dir), file->d_name, 0); 905a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 906a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root closedir(dir); 907a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return true; 908a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 909a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 910655b958eb2180c7c06889f83f606d23421bf038cKenny Rootprivate: 911655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const int MASTER_KEY_SIZE_BYTES = 16; 912655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const int MASTER_KEY_SIZE_BITS = MASTER_KEY_SIZE_BYTES * 8; 913655b958eb2180c7c06889f83f606d23421bf038cKenny Root 914655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const int MAX_RETRY = 4; 915655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const size_t SALT_SIZE = 16; 916655b958eb2180c7c06889f83f606d23421bf038cKenny Root 917655b958eb2180c7c06889f83f606d23421bf038cKenny Root void generateKeyFromPassword(uint8_t* key, ssize_t keySize, const android::String8& pw, 918655b958eb2180c7c06889f83f606d23421bf038cKenny Root uint8_t* salt) { 919655b958eb2180c7c06889f83f606d23421bf038cKenny Root size_t saltSize; 920655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (salt != NULL) { 921655b958eb2180c7c06889f83f606d23421bf038cKenny Root saltSize = SALT_SIZE; 922655b958eb2180c7c06889f83f606d23421bf038cKenny Root } else { 923655b958eb2180c7c06889f83f606d23421bf038cKenny Root // pre-gingerbread used this hardwired salt, readMasterKey will rewrite these when found 924655b958eb2180c7c06889f83f606d23421bf038cKenny Root salt = (uint8_t*) "keystore"; 925655b958eb2180c7c06889f83f606d23421bf038cKenny Root // sizeof = 9, not strlen = 8 926655b958eb2180c7c06889f83f606d23421bf038cKenny Root saltSize = sizeof("keystore"); 927655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 928655b958eb2180c7c06889f83f606d23421bf038cKenny Root 929655b958eb2180c7c06889f83f606d23421bf038cKenny Root PKCS5_PBKDF2_HMAC_SHA1(reinterpret_cast<const char*>(pw.string()), pw.length(), salt, 930655b958eb2180c7c06889f83f606d23421bf038cKenny Root saltSize, 8192, keySize, key); 931655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 932655b958eb2180c7c06889f83f606d23421bf038cKenny Root 933655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool generateSalt(Entropy* entropy) { 934655b958eb2180c7c06889f83f606d23421bf038cKenny Root return entropy->generate_random_data(mSalt, sizeof(mSalt)); 935655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 936655b958eb2180c7c06889f83f606d23421bf038cKenny Root 937655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool generateMasterKey(Entropy* entropy) { 938655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!entropy->generate_random_data(mMasterKey, sizeof(mMasterKey))) { 939655b958eb2180c7c06889f83f606d23421bf038cKenny Root return false; 940655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 941655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!generateSalt(entropy)) { 942655b958eb2180c7c06889f83f606d23421bf038cKenny Root return false; 943655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 944655b958eb2180c7c06889f83f606d23421bf038cKenny Root return true; 945655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 946655b958eb2180c7c06889f83f606d23421bf038cKenny Root 947655b958eb2180c7c06889f83f606d23421bf038cKenny Root void setupMasterKeys() { 948655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_set_encrypt_key(mMasterKey, MASTER_KEY_SIZE_BITS, &mMasterKeyEncryption); 949655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_set_decrypt_key(mMasterKey, MASTER_KEY_SIZE_BITS, &mMasterKeyDecryption); 950655b958eb2180c7c06889f83f606d23421bf038cKenny Root setState(STATE_NO_ERROR); 951655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 952655b958eb2180c7c06889f83f606d23421bf038cKenny Root 953655b958eb2180c7c06889f83f606d23421bf038cKenny Root uid_t mUserId; 954655b958eb2180c7c06889f83f606d23421bf038cKenny Root 955655b958eb2180c7c06889f83f606d23421bf038cKenny Root char* mUserDir; 956655b958eb2180c7c06889f83f606d23421bf038cKenny Root char* mMasterKeyFile; 957655b958eb2180c7c06889f83f606d23421bf038cKenny Root 958655b958eb2180c7c06889f83f606d23421bf038cKenny Root State mState; 959655b958eb2180c7c06889f83f606d23421bf038cKenny Root int8_t mRetry; 960655b958eb2180c7c06889f83f606d23421bf038cKenny Root 961655b958eb2180c7c06889f83f606d23421bf038cKenny Root uint8_t mMasterKey[MASTER_KEY_SIZE_BYTES]; 962655b958eb2180c7c06889f83f606d23421bf038cKenny Root uint8_t mSalt[SALT_SIZE]; 963655b958eb2180c7c06889f83f606d23421bf038cKenny Root 964655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_KEY mMasterKeyEncryption; 965655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_KEY mMasterKeyDecryption; 966655b958eb2180c7c06889f83f606d23421bf038cKenny Root}; 967655b958eb2180c7c06889f83f606d23421bf038cKenny Root 968655b958eb2180c7c06889f83f606d23421bf038cKenny Roottypedef struct { 969655b958eb2180c7c06889f83f606d23421bf038cKenny Root uint32_t uid; 970655b958eb2180c7c06889f83f606d23421bf038cKenny Root const uint8_t* filename; 971655b958eb2180c7c06889f83f606d23421bf038cKenny Root} grant_t; 972655b958eb2180c7c06889f83f606d23421bf038cKenny Root 973655b958eb2180c7c06889f83f606d23421bf038cKenny Rootclass KeyStore { 974655b958eb2180c7c06889f83f606d23421bf038cKenny Rootpublic: 97567d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker KeyStore(Entropy* entropy, keymaster1_device_t* device, keymaster1_device_t* fallback) 976655b958eb2180c7c06889f83f606d23421bf038cKenny Root : mEntropy(entropy) 977655b958eb2180c7c06889f83f606d23421bf038cKenny Root , mDevice(device) 978fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker , mFallbackDevice(fallback) 979655b958eb2180c7c06889f83f606d23421bf038cKenny Root { 980655b958eb2180c7c06889f83f606d23421bf038cKenny Root memset(&mMetaData, '\0', sizeof(mMetaData)); 981655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 982655b958eb2180c7c06889f83f606d23421bf038cKenny Root 983655b958eb2180c7c06889f83f606d23421bf038cKenny Root ~KeyStore() { 984655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<grant_t*>::iterator it(mGrants.begin()); 985655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mGrants.end(); it++) { 986655b958eb2180c7c06889f83f606d23421bf038cKenny Root delete *it; 987655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 988c35d4eb3e66aa69ca17dd83b1bcdcc19276bf8e5haitao fang mGrants.clear(); 989655b958eb2180c7c06889f83f606d23421bf038cKenny Root 990655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<UserState*>::iterator it(mMasterKeys.begin()); 991655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mMasterKeys.end(); it++) { 992655b958eb2180c7c06889f83f606d23421bf038cKenny Root delete *it; 993655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 994c35d4eb3e66aa69ca17dd83b1bcdcc19276bf8e5haitao fang mMasterKeys.clear(); 995655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 996655b958eb2180c7c06889f83f606d23421bf038cKenny Root 99767d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker /** 99867d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker * Depending on the hardware keymaster version is this may return a 99967d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker * keymaster0_device_t* cast to a keymaster1_device_t*. All methods from 100067d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker * keymaster0 are safe to call, calls to keymaster1_device_t methods should 100167d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker * be guarded by a check on the device's version. 100267d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker */ 100367d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker keymaster1_device_t *getDevice() const { 1004655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mDevice; 1005655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1006655b958eb2180c7c06889f83f606d23421bf038cKenny Root 100767d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker keymaster1_device_t *getFallbackDevice() const { 1008fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker return mFallbackDevice; 1009fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker } 1010fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker 101167d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker keymaster1_device_t *getDeviceForBlob(const Blob& blob) const { 1012fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker return blob.isFallback() ? mFallbackDevice: mDevice; 1013fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker } 1014fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker 1015655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode initialize() { 1016655b958eb2180c7c06889f83f606d23421bf038cKenny Root readMetaData(); 1017655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (upgradeKeystore()) { 1018655b958eb2180c7c06889f83f606d23421bf038cKenny Root writeMetaData(); 1019655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1020655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1021655b958eb2180c7c06889f83f606d23421bf038cKenny Root return ::NO_ERROR; 1022655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1023655b958eb2180c7c06889f83f606d23421bf038cKenny Root 102472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker State getState(uid_t userId) { 102572593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return getUserState(userId)->getState(); 1026655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1027655b958eb2180c7c06889f83f606d23421bf038cKenny Root 102872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode initializeUser(const android::String8& pw, uid_t userId) { 102972593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserState(userId); 1030655b958eb2180c7c06889f83f606d23421bf038cKenny Root return userState->initialize(pw, mEntropy); 1031655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1032655b958eb2180c7c06889f83f606d23421bf038cKenny Root 103372593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode copyMasterKey(uid_t srcUser, uid_t dstUser) { 103472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState *userState = getUserState(dstUser); 103572593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState *initState = getUserState(srcUser); 10364e865753346fc6a075966972a7a98051818859dbRobin Lee return userState->copyMasterKey(initState); 10374e865753346fc6a075966972a7a98051818859dbRobin Lee } 10384e865753346fc6a075966972a7a98051818859dbRobin Lee 103972593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode writeMasterKey(const android::String8& pw, uid_t userId) { 104072593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserState(userId); 1041655b958eb2180c7c06889f83f606d23421bf038cKenny Root return userState->writeMasterKey(pw, mEntropy); 1042655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1043655b958eb2180c7c06889f83f606d23421bf038cKenny Root 104472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode readMasterKey(const android::String8& pw, uid_t userId) { 104572593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserState(userId); 1046655b958eb2180c7c06889f83f606d23421bf038cKenny Root return userState->readMasterKey(pw, mEntropy); 1047655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1048655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1049655b958eb2180c7c06889f83f606d23421bf038cKenny Root android::String8 getKeyName(const android::String8& keyName) { 1050a77e809ecff5190790906fb7a3c527259c735071Douglas Leung char encoded[encode_key_length(keyName) + 1]; // add 1 for null char 1051655b958eb2180c7c06889f83f606d23421bf038cKenny Root encode_key(encoded, keyName); 1052655b958eb2180c7c06889f83f606d23421bf038cKenny Root return android::String8(encoded); 1053655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1054655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1055655b958eb2180c7c06889f83f606d23421bf038cKenny Root android::String8 getKeyNameForUid(const android::String8& keyName, uid_t uid) { 1056a77e809ecff5190790906fb7a3c527259c735071Douglas Leung char encoded[encode_key_length(keyName) + 1]; // add 1 for null char 1057655b958eb2180c7c06889f83f606d23421bf038cKenny Root encode_key(encoded, keyName); 1058655b958eb2180c7c06889f83f606d23421bf038cKenny Root return android::String8::format("%u_%s", uid, encoded); 1059655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1060655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1061655b958eb2180c7c06889f83f606d23421bf038cKenny Root android::String8 getKeyNameForUidWithDir(const android::String8& keyName, uid_t uid) { 1062a77e809ecff5190790906fb7a3c527259c735071Douglas Leung char encoded[encode_key_length(keyName) + 1]; // add 1 for null char 1063655b958eb2180c7c06889f83f606d23421bf038cKenny Root encode_key(encoded, keyName); 106472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return android::String8::format("%s/%u_%s", getUserStateByUid(uid)->getUserDirName(), uid, 1065655b958eb2180c7c06889f83f606d23421bf038cKenny Root encoded); 1066655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1067655b958eb2180c7c06889f83f606d23421bf038cKenny Root 106896d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker /* 106996d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker * Delete entries owned by userId. If keepUnencryptedEntries is true 107096d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker * then only encrypted entries will be removed, otherwise all entries will 107196d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker * be removed. 107296d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker */ 107396d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker void resetUser(uid_t userId, bool keepUnenryptedEntries) { 10744b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee android::String8 prefix(""); 10754b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee android::Vector<android::String16> aliases; 107672593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserState(userId); 1077e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker if (list(prefix, &aliases, userId) != ::NO_ERROR) { 107896d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker return; 10794b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 10804b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee for (uint32_t i = 0; i < aliases.size(); i++) { 10814b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee android::String8 filename(aliases[i]); 10824b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee filename = android::String8::format("%s/%s", userState->getUserDirName(), 108396d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker getKeyName(filename).string()); 108496d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker bool shouldDelete = true; 108596d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if (keepUnenryptedEntries) { 108696d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker Blob blob; 108772593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode rc = get(filename, &blob, ::TYPE_ANY, userId); 108896d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker 108996d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker /* get can fail if the blob is encrypted and the state is 109096d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker * not unlocked, only skip deleting blobs that were loaded and 109196d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker * who are not encrypted. If there are blobs we fail to read for 109296d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker * other reasons err on the safe side and delete them since we 109396d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker * can't tell if they're encrypted. 109496d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker */ 109596d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker shouldDelete = !(rc == ::NO_ERROR && !blob.isEncrypted()); 109696d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 109796d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if (shouldDelete) { 109872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker del(filename, ::TYPE_ANY, userId); 109996d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 110096d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 110196d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if (!userState->deleteMasterKey()) { 110296d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker ALOGE("Failed to delete user %d's master key", userId); 110396d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 110496d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if (!keepUnenryptedEntries) { 110596d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if(!userState->reset()) { 110696d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker ALOGE("Failed to remove user %d's directory", userId); 110796d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 11084b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 1109655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1110655b958eb2180c7c06889f83f606d23421bf038cKenny Root 111172593ee807e89239d98ae08d32c733ecc08203baChad Brubaker bool isEmpty(uid_t userId) const { 111272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker const UserState* userState = getUserState(userId); 111396d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if (userState == NULL) { 1114655b958eb2180c7c06889f83f606d23421bf038cKenny Root return true; 1115655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1116655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1117655b958eb2180c7c06889f83f606d23421bf038cKenny Root DIR* dir = opendir(userState->getUserDirName()); 1118a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (!dir) { 1119a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return true; 1120a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1121655b958eb2180c7c06889f83f606d23421bf038cKenny Root 112231e27468b6d822adbd2aec9219a68c206aa6957cKenny Root bool result = true; 112331e27468b6d822adbd2aec9219a68c206aa6957cKenny Root struct dirent* file; 1124a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root while ((file = readdir(dir)) != NULL) { 1125655b958eb2180c7c06889f83f606d23421bf038cKenny Root // We only care about files. 1126655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (file->d_type != DT_REG) { 1127655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1128655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1129655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1130655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Skip anything that starts with a "." 1131655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (file->d_name[0] == '.') { 1132655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1133655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1134655b958eb2180c7c06889f83f606d23421bf038cKenny Root 113531e27468b6d822adbd2aec9219a68c206aa6957cKenny Root result = false; 113631e27468b6d822adbd2aec9219a68c206aa6957cKenny Root break; 1137a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1138a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root closedir(dir); 1139a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return result; 1140a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1141a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 114272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker void lock(uid_t userId) { 114372593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserState(userId); 1144655b958eb2180c7c06889f83f606d23421bf038cKenny Root userState->zeroizeMasterKeysInMemory(); 1145655b958eb2180c7c06889f83f606d23421bf038cKenny Root userState->setState(STATE_LOCKED); 1146a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1147a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 114872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode get(const char* filename, Blob* keyBlob, const BlobType type, uid_t userId) { 114972593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserState(userId); 1150f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ResponseCode rc = keyBlob->readBlob(filename, userState->getDecryptionKey(), 1151f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root userState->getState()); 1152822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (rc != NO_ERROR) { 1153822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return rc; 1154822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1155822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1156822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root const uint8_t version = keyBlob->getVersion(); 115707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (version < CURRENT_BLOB_VERSION) { 1158cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root /* If we upgrade the key, we need to write it to disk again. Then 1159cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root * it must be read it again since the blob is encrypted each time 1160cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root * it's written. 1161cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root */ 116272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker if (upgradeBlob(filename, keyBlob, version, type, userId)) { 116372593ee807e89239d98ae08d32c733ecc08203baChad Brubaker if ((rc = this->put(filename, keyBlob, userId)) != NO_ERROR 1164f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root || (rc = keyBlob->readBlob(filename, userState->getDecryptionKey(), 1165f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root userState->getState())) != NO_ERROR) { 1166cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root return rc; 1167cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root } 1168cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root } 1169822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1170822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 117117208e0de5a42722901d803118745cca25fd10c1Kenny Root /* 117217208e0de5a42722901d803118745cca25fd10c1Kenny Root * This will upgrade software-backed keys to hardware-backed keys when 117317208e0de5a42722901d803118745cca25fd10c1Kenny Root * the HAL for the device supports the newer key types. 117417208e0de5a42722901d803118745cca25fd10c1Kenny Root */ 117517208e0de5a42722901d803118745cca25fd10c1Kenny Root if (rc == NO_ERROR && type == TYPE_KEY_PAIR 117617208e0de5a42722901d803118745cca25fd10c1Kenny Root && mDevice->common.module->module_api_version >= KEYMASTER_MODULE_API_VERSION_0_2 117717208e0de5a42722901d803118745cca25fd10c1Kenny Root && keyBlob->isFallback()) { 117817208e0de5a42722901d803118745cca25fd10c1Kenny Root ResponseCode imported = importKey(keyBlob->getValue(), keyBlob->getLength(), filename, 117972593ee807e89239d98ae08d32c733ecc08203baChad Brubaker userId, keyBlob->isEncrypted() ? KEYSTORE_FLAG_ENCRYPTED : KEYSTORE_FLAG_NONE); 118017208e0de5a42722901d803118745cca25fd10c1Kenny Root 118117208e0de5a42722901d803118745cca25fd10c1Kenny Root // The HAL allowed the import, reget the key to have the "fresh" 118217208e0de5a42722901d803118745cca25fd10c1Kenny Root // version. 118317208e0de5a42722901d803118745cca25fd10c1Kenny Root if (imported == NO_ERROR) { 118472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker rc = get(filename, keyBlob, TYPE_KEY_PAIR, userId); 118517208e0de5a42722901d803118745cca25fd10c1Kenny Root } 118617208e0de5a42722901d803118745cca25fd10c1Kenny Root } 118717208e0de5a42722901d803118745cca25fd10c1Kenny Root 11883a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker // Keymaster 0.3 keys are valid keymaster 1.0 keys, so silently upgrade. 11893a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (keyBlob->getType() == TYPE_KEY_PAIR) { 11903cc40125e8b495e7f0784dad53bb9acdb5b9a8ebChad Brubaker keyBlob->setType(TYPE_KEYMASTER_10); 11913a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker rc = this->put(filename, keyBlob, userId); 11923cc40125e8b495e7f0784dad53bb9acdb5b9a8ebChad Brubaker } 11933cc40125e8b495e7f0784dad53bb9acdb5b9a8ebChad Brubaker 1194d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (type != TYPE_ANY && keyBlob->getType() != type) { 1195822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGW("key found but type doesn't match: %d vs %d", keyBlob->getType(), type); 1196822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return KEY_NOT_FOUND; 1197822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1198822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1199822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return rc; 1200a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1201a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 120272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode put(const char* filename, Blob* keyBlob, uid_t userId) { 120372593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserState(userId); 1204f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return keyBlob->writeBlob(filename, userState->getEncryptionKey(), userState->getState(), 1205f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root mEntropy); 1206a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1207a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 120872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode del(const char *filename, const BlobType type, uid_t userId) { 12094b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee Blob keyBlob; 121072593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode rc = get(filename, &keyBlob, type, userId); 12114b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (rc != ::NO_ERROR) { 12124b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return rc; 12134b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12144b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 12154b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (keyBlob.getType() == ::TYPE_KEY_PAIR) { 12164b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee // A device doesn't have to implement delete_keypair. 12174b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (mDevice->delete_keypair != NULL && !keyBlob.isFallback()) { 12184b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (mDevice->delete_keypair(mDevice, keyBlob.getValue(), keyBlob.getLength())) { 12194b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee rc = ::SYSTEM_ERROR; 12204b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12214b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12224b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 122317d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker if (keyBlob.getType() == ::TYPE_KEYMASTER_10) { 122417d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker keymaster1_device_t* dev = getDeviceForBlob(keyBlob); 122517d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker if (dev->delete_key) { 122617d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker keymaster_key_blob_t blob; 122717d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker blob.key_material = keyBlob.getValue(); 122817d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker blob.key_material_size = keyBlob.getLength(); 122917d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker dev->delete_key(dev, &blob); 123017d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 123117d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 12324b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (rc != ::NO_ERROR) { 12334b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return rc; 12344b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12354b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 12364b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return (unlink(filename) && errno != ENOENT) ? ::SYSTEM_ERROR : ::NO_ERROR; 12374b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12384b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 1239e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker ResponseCode list(const android::String8& prefix, android::Vector<android::String16> *matches, 124072593ee807e89239d98ae08d32c733ecc08203baChad Brubaker uid_t userId) { 12414b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 124272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserState(userId); 12434b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee size_t n = prefix.length(); 12444b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 12454b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee DIR* dir = opendir(userState->getUserDirName()); 12464b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (!dir) { 12474b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee ALOGW("can't open directory for user: %s", strerror(errno)); 12484b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return ::SYSTEM_ERROR; 12494b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12504b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 12514b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee struct dirent* file; 12524b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee while ((file = readdir(dir)) != NULL) { 12534b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee // We only care about files. 12544b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (file->d_type != DT_REG) { 12554b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee continue; 12564b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12574b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 12584b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee // Skip anything that starts with a "." 12594b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (file->d_name[0] == '.') { 12604b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee continue; 12614b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12624b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 12634b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (!strncmp(prefix.string(), file->d_name, n)) { 12644b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee const char* p = &file->d_name[n]; 12654b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee size_t plen = strlen(p); 12664b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 12674b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee size_t extra = decode_key_length(p, plen); 12684b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee char *match = (char*) malloc(extra + 1); 12694b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (match != NULL) { 12704b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee decode_key(match, p, plen); 12714b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee matches->push(android::String16(match, extra)); 12724b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee free(match); 12734b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } else { 12744b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee ALOGW("could not allocate match of size %zd", extra); 12754b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12764b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12774b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12784b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee closedir(dir); 12794b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return ::NO_ERROR; 12804b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12814b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 128207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root void addGrant(const char* filename, uid_t granteeUid) { 1283655b958eb2180c7c06889f83f606d23421bf038cKenny Root const grant_t* existing = getGrant(filename, granteeUid); 1284655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (existing == NULL) { 1285655b958eb2180c7c06889f83f606d23421bf038cKenny Root grant_t* grant = new grant_t; 128607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root grant->uid = granteeUid; 1287a8c703d9fdd98e3caefb6e74cd03c2878cecd0a1Brian Carlstrom grant->filename = reinterpret_cast<const uint8_t*>(strdup(filename)); 1288655b958eb2180c7c06889f83f606d23421bf038cKenny Root mGrants.add(grant); 128970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 129070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 129170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 129207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root bool removeGrant(const char* filename, uid_t granteeUid) { 1293655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<grant_t*>::iterator it(mGrants.begin()); 1294655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mGrants.end(); it++) { 1295655b958eb2180c7c06889f83f606d23421bf038cKenny Root grant_t* grant = *it; 1296655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (grant->uid == granteeUid 1297655b958eb2180c7c06889f83f606d23421bf038cKenny Root && !strcmp(reinterpret_cast<const char*>(grant->filename), filename)) { 1298655b958eb2180c7c06889f83f606d23421bf038cKenny Root mGrants.erase(it); 1299655b958eb2180c7c06889f83f606d23421bf038cKenny Root return true; 1300655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 130170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 130270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return false; 130370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 130470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1305a8c703d9fdd98e3caefb6e74cd03c2878cecd0a1Brian Carlstrom bool hasGrant(const char* filename, const uid_t uid) const { 1306a8c703d9fdd98e3caefb6e74cd03c2878cecd0a1Brian Carlstrom return getGrant(filename, uid) != NULL; 130770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 130870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 130972593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode importKey(const uint8_t* key, size_t keyLen, const char* filename, uid_t userId, 1310f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root int32_t flags) { 1311822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root uint8_t* data; 1312822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root size_t dataLength; 1313822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root int rc; 1314822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1315822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (mDevice->import_keypair == NULL) { 1316822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGE("Keymaster doesn't support import!"); 1317822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return SYSTEM_ERROR; 1318822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1319822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 132017208e0de5a42722901d803118745cca25fd10c1Kenny Root bool isFallback = false; 132107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root rc = mDevice->import_keypair(mDevice, key, keyLen, &data, &dataLength); 1322822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (rc) { 1323a39da5a226975f8b75f93de255a21d526ae8d334Kenny Root /* 1324a39da5a226975f8b75f93de255a21d526ae8d334Kenny Root * Maybe the device doesn't support this type of key. Try to use the 1325a39da5a226975f8b75f93de255a21d526ae8d334Kenny Root * software fallback keymaster implementation. This is a little bit 1326a39da5a226975f8b75f93de255a21d526ae8d334Kenny Root * lazier than checking the PKCS#8 key type, but the software 1327a39da5a226975f8b75f93de255a21d526ae8d334Kenny Root * implementation will do that anyway. 1328a39da5a226975f8b75f93de255a21d526ae8d334Kenny Root */ 13297c1eb75a6898452867ca28a4d7fad2d91edca615Chad Brubaker rc = mFallbackDevice->import_keypair(mFallbackDevice, key, keyLen, &data, &dataLength); 1330a39da5a226975f8b75f93de255a21d526ae8d334Kenny Root isFallback = true; 133117208e0de5a42722901d803118745cca25fd10c1Kenny Root 133217208e0de5a42722901d803118745cca25fd10c1Kenny Root if (rc) { 133317208e0de5a42722901d803118745cca25fd10c1Kenny Root ALOGE("Error while importing keypair: %d", rc); 133417208e0de5a42722901d803118745cca25fd10c1Kenny Root return SYSTEM_ERROR; 133517208e0de5a42722901d803118745cca25fd10c1Kenny Root } 1336822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1337822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1338822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root Blob keyBlob(data, dataLength, NULL, 0, TYPE_KEY_PAIR); 1339822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root free(data); 1340822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1341f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root keyBlob.setEncrypted(flags & KEYSTORE_FLAG_ENCRYPTED); 134217208e0de5a42722901d803118745cca25fd10c1Kenny Root keyBlob.setFallback(isFallback); 1343f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 134472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return put(filename, &keyBlob, userId); 1345822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1346822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 13471b0e3933900c7ea21189704d5db64e7346aee7afKenny Root bool isHardwareBacked(const android::String16& keyType) const { 13481b0e3933900c7ea21189704d5db64e7346aee7afKenny Root if (mDevice == NULL) { 13491b0e3933900c7ea21189704d5db64e7346aee7afKenny Root ALOGW("can't get keymaster device"); 13501b0e3933900c7ea21189704d5db64e7346aee7afKenny Root return false; 13511b0e3933900c7ea21189704d5db64e7346aee7afKenny Root } 13521b0e3933900c7ea21189704d5db64e7346aee7afKenny Root 13531b0e3933900c7ea21189704d5db64e7346aee7afKenny Root if (sRSAKeyType == keyType) { 13541b0e3933900c7ea21189704d5db64e7346aee7afKenny Root return (mDevice->flags & KEYMASTER_SOFTWARE_ONLY) == 0; 13551b0e3933900c7ea21189704d5db64e7346aee7afKenny Root } else { 13561b0e3933900c7ea21189704d5db64e7346aee7afKenny Root return (mDevice->flags & KEYMASTER_SOFTWARE_ONLY) == 0 13571b0e3933900c7ea21189704d5db64e7346aee7afKenny Root && (mDevice->common.module->module_api_version 13581b0e3933900c7ea21189704d5db64e7346aee7afKenny Root >= KEYMASTER_MODULE_API_VERSION_0_2); 13591b0e3933900c7ea21189704d5db64e7346aee7afKenny Root } 13608ddf35a6e1fd80a7d0685041d2bfc77078277c9dKenny Root } 13618ddf35a6e1fd80a7d0685041d2bfc77078277c9dKenny Root 1362655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode getKeyForName(Blob* keyBlob, const android::String8& keyName, const uid_t uid, 1363655b958eb2180c7c06889f83f606d23421bf038cKenny Root const BlobType type) { 136486b16e8c0d353af97f0411917789308dba417295Kenny Root android::String8 filepath8(getKeyNameForUidWithDir(keyName, uid)); 136572593ee807e89239d98ae08d32c733ecc08203baChad Brubaker uid_t userId = get_user_id(uid); 1366a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 136772593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode responseCode = get(filepath8.string(), keyBlob, type, userId); 1368655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (responseCode == NO_ERROR) { 1369655b958eb2180c7c06889f83f606d23421bf038cKenny Root return responseCode; 1370655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1371a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1372655b958eb2180c7c06889f83f606d23421bf038cKenny Root // If this is one of the legacy UID->UID mappings, use it. 1373655b958eb2180c7c06889f83f606d23421bf038cKenny Root uid_t euid = get_keystore_euid(uid); 1374655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (euid != uid) { 137586b16e8c0d353af97f0411917789308dba417295Kenny Root filepath8 = getKeyNameForUidWithDir(keyName, euid); 137672593ee807e89239d98ae08d32c733ecc08203baChad Brubaker responseCode = get(filepath8.string(), keyBlob, type, userId); 1377655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (responseCode == NO_ERROR) { 1378655b958eb2180c7c06889f83f606d23421bf038cKenny Root return responseCode; 1379655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1380655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 138170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1382655b958eb2180c7c06889f83f606d23421bf038cKenny Root // They might be using a granted key. 138386b16e8c0d353af97f0411917789308dba417295Kenny Root android::String8 filename8 = getKeyName(keyName); 1384655b958eb2180c7c06889f83f606d23421bf038cKenny Root char* end; 138586b16e8c0d353af97f0411917789308dba417295Kenny Root strtoul(filename8.string(), &end, 10); 1386655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (end[0] != '_' || end[1] == 0) { 1387655b958eb2180c7c06889f83f606d23421bf038cKenny Root return KEY_NOT_FOUND; 1388655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 138972593ee807e89239d98ae08d32c733ecc08203baChad Brubaker filepath8 = android::String8::format("%s/%s", getUserState(userId)->getUserDirName(), 139086b16e8c0d353af97f0411917789308dba417295Kenny Root filename8.string()); 1391655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!hasGrant(filepath8.string(), uid)) { 1392655b958eb2180c7c06889f83f606d23421bf038cKenny Root return responseCode; 1393a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1394a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1395655b958eb2180c7c06889f83f606d23421bf038cKenny Root // It is a granted key. Try to load it. 139672593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return get(filepath8.string(), keyBlob, type, userId); 1397a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1398a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1399655b958eb2180c7c06889f83f606d23421bf038cKenny Root /** 1400655b958eb2180c7c06889f83f606d23421bf038cKenny Root * Returns any existing UserState or creates it if it doesn't exist. 1401655b958eb2180c7c06889f83f606d23421bf038cKenny Root */ 140272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* getUserState(uid_t userId) { 1403655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<UserState*>::iterator it(mMasterKeys.begin()); 1404655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mMasterKeys.end(); it++) { 1405655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState* state = *it; 1406655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (state->getUserId() == userId) { 1407655b958eb2180c7c06889f83f606d23421bf038cKenny Root return state; 1408655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1409a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1410655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1411655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState* userState = new UserState(userId); 1412655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!userState->initialize()) { 1413655b958eb2180c7c06889f83f606d23421bf038cKenny Root /* There's not much we can do if initialization fails. Trying to 1414655b958eb2180c7c06889f83f606d23421bf038cKenny Root * unlock the keystore for that user will fail as well, so any 1415655b958eb2180c7c06889f83f606d23421bf038cKenny Root * subsequent request for this user will just return SYSTEM_ERROR. 1416655b958eb2180c7c06889f83f606d23421bf038cKenny Root */ 1417655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGE("User initialization failed for %u; subsuquent operations will fail", userId); 1418a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1419655b958eb2180c7c06889f83f606d23421bf038cKenny Root mMasterKeys.add(userState); 1420655b958eb2180c7c06889f83f606d23421bf038cKenny Root return userState; 1421a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1422a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1423655b958eb2180c7c06889f83f606d23421bf038cKenny Root /** 142472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker * Returns any existing UserState or creates it if it doesn't exist. 1425655b958eb2180c7c06889f83f606d23421bf038cKenny Root */ 142672593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* getUserStateByUid(uid_t uid) { 1427655b958eb2180c7c06889f83f606d23421bf038cKenny Root uid_t userId = get_user_id(uid); 142872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return getUserState(userId); 142972593ee807e89239d98ae08d32c733ecc08203baChad Brubaker } 1430655b958eb2180c7c06889f83f606d23421bf038cKenny Root 143172593ee807e89239d98ae08d32c733ecc08203baChad Brubaker /** 143272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker * Returns NULL if the UserState doesn't already exist. 143372593ee807e89239d98ae08d32c733ecc08203baChad Brubaker */ 143472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker const UserState* getUserState(uid_t userId) const { 1435655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<UserState*>::const_iterator it(mMasterKeys.begin()); 1436655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mMasterKeys.end(); it++) { 1437655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState* state = *it; 1438655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (state->getUserId() == userId) { 1439655b958eb2180c7c06889f83f606d23421bf038cKenny Root return state; 1440655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1441655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1442a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1443655b958eb2180c7c06889f83f606d23421bf038cKenny Root return NULL; 1444a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1445a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 144672593ee807e89239d98ae08d32c733ecc08203baChad Brubaker /** 144772593ee807e89239d98ae08d32c733ecc08203baChad Brubaker * Returns NULL if the UserState doesn't already exist. 144872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker */ 144972593ee807e89239d98ae08d32c733ecc08203baChad Brubaker const UserState* getUserStateByUid(uid_t uid) const { 145072593ee807e89239d98ae08d32c733ecc08203baChad Brubaker uid_t userId = get_user_id(uid); 145172593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return getUserState(userId); 145272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker } 145372593ee807e89239d98ae08d32c733ecc08203baChad Brubaker 1454655b958eb2180c7c06889f83f606d23421bf038cKenny Rootprivate: 1455655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const char* sOldMasterKey; 1456655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const char* sMetaDataFile; 14571b0e3933900c7ea21189704d5db64e7346aee7afKenny Root static const android::String16 sRSAKeyType; 1458655b958eb2180c7c06889f83f606d23421bf038cKenny Root Entropy* mEntropy; 145907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 146067d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker keymaster1_device_t* mDevice; 146167d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker keymaster1_device_t* mFallbackDevice; 1462a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1463655b958eb2180c7c06889f83f606d23421bf038cKenny Root android::Vector<UserState*> mMasterKeys; 1464655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1465655b958eb2180c7c06889f83f606d23421bf038cKenny Root android::Vector<grant_t*> mGrants; 146670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1467655b958eb2180c7c06889f83f606d23421bf038cKenny Root typedef struct { 1468655b958eb2180c7c06889f83f606d23421bf038cKenny Root uint32_t version; 1469655b958eb2180c7c06889f83f606d23421bf038cKenny Root } keystore_metadata_t; 147070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1471655b958eb2180c7c06889f83f606d23421bf038cKenny Root keystore_metadata_t mMetaData; 1472655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1473655b958eb2180c7c06889f83f606d23421bf038cKenny Root const grant_t* getGrant(const char* filename, uid_t uid) const { 1474655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<grant_t*>::const_iterator it(mGrants.begin()); 1475655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mGrants.end(); it++) { 1476655b958eb2180c7c06889f83f606d23421bf038cKenny Root grant_t* grant = *it; 147770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root if (grant->uid == uid 1478655b958eb2180c7c06889f83f606d23421bf038cKenny Root && !strcmp(reinterpret_cast<const char*>(grant->filename), filename)) { 147970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return grant; 148070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 148170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 148270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return NULL; 148370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 148470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1485822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root /** 1486822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Upgrade code. This will upgrade the key from the current version 1487822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * to whatever is newest. 1488822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root */ 1489655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool upgradeBlob(const char* filename, Blob* blob, const uint8_t oldVersion, 1490655b958eb2180c7c06889f83f606d23421bf038cKenny Root const BlobType type, uid_t uid) { 1491822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root bool updated = false; 1492822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root uint8_t version = oldVersion; 1493822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1494822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root /* From V0 -> V1: All old types were unknown */ 1495822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (version == 0) { 1496822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGV("upgrading to version 1 and setting type %d", type); 1497822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1498822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root blob->setType(type); 1499822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (type == TYPE_KEY_PAIR) { 1500655b958eb2180c7c06889f83f606d23421bf038cKenny Root importBlobAsKey(blob, filename, uid); 1501822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1502822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root version = 1; 1503822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root updated = true; 1504822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1505822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1506f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root /* From V1 -> V2: All old keys were encrypted */ 1507f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (version == 1) { 1508f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ALOGV("upgrading to version 2"); 1509f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 1510f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root blob->setEncrypted(true); 1511f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root version = 2; 1512f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root updated = true; 1513f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 1514f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 1515822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root /* 1516822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * If we've updated, set the key blob to the right version 1517822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * and write it. 1518cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root */ 1519822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (updated) { 1520822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGV("updated and writing file %s", filename); 1521822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root blob->setVersion(version); 1522822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1523cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root 1524cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root return updated; 1525822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1526822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1527822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root /** 1528822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Takes a blob that is an PEM-encoded RSA key as a byte array and 1529822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * converts it to a DER-encoded PKCS#8 for import into a keymaster. 1530822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Then it overwrites the original blob with the new blob 1531822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * format that is returned from the keymaster. 1532822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root */ 1533655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode importBlobAsKey(Blob* blob, const char* filename, uid_t uid) { 1534822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root // We won't even write to the blob directly with this BIO, so const_cast is okay. 1535822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root Unique_BIO b(BIO_new_mem_buf(const_cast<uint8_t*>(blob->getValue()), blob->getLength())); 1536822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (b.get() == NULL) { 1537822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGE("Problem instantiating BIO"); 1538822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return SYSTEM_ERROR; 1539822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1540822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1541822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root Unique_EVP_PKEY pkey(PEM_read_bio_PrivateKey(b.get(), NULL, NULL, NULL)); 1542822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (pkey.get() == NULL) { 1543822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGE("Couldn't read old PEM file"); 1544822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return SYSTEM_ERROR; 1545822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1546822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1547822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root Unique_PKCS8_PRIV_KEY_INFO pkcs8(EVP_PKEY2PKCS8(pkey.get())); 1548822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root int len = i2d_PKCS8_PRIV_KEY_INFO(pkcs8.get(), NULL); 1549822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (len < 0) { 1550822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGE("Couldn't measure PKCS#8 length"); 1551822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return SYSTEM_ERROR; 1552822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1553822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 155470c9889c5ca912e7c492580e1999f18ab65b267bKenny Root UniquePtr<unsigned char[]> pkcs8key(new unsigned char[len]); 155570c9889c5ca912e7c492580e1999f18ab65b267bKenny Root uint8_t* tmp = pkcs8key.get(); 1556822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (i2d_PKCS8_PRIV_KEY_INFO(pkcs8.get(), &tmp) != len) { 1557822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGE("Couldn't convert to PKCS#8"); 1558822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return SYSTEM_ERROR; 1559822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1560822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 156172593ee807e89239d98ae08d32c733ecc08203baChad Brubaker ResponseCode rc = importKey(pkcs8key.get(), len, filename, get_user_id(uid), 1562f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root blob->isEncrypted() ? KEYSTORE_FLAG_ENCRYPTED : KEYSTORE_FLAG_NONE); 1563822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (rc != NO_ERROR) { 1564822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return rc; 1565822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1566822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1567655b958eb2180c7c06889f83f606d23421bf038cKenny Root return get(filename, blob, TYPE_KEY_PAIR, uid); 1568822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 156970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1570655b958eb2180c7c06889f83f606d23421bf038cKenny Root void readMetaData() { 1571655b958eb2180c7c06889f83f606d23421bf038cKenny Root int in = TEMP_FAILURE_RETRY(open(sMetaDataFile, O_RDONLY)); 1572655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (in < 0) { 1573655b958eb2180c7c06889f83f606d23421bf038cKenny Root return; 1574655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1575655b958eb2180c7c06889f83f606d23421bf038cKenny Root size_t fileLength = readFully(in, (uint8_t*) &mMetaData, sizeof(mMetaData)); 1576655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (fileLength != sizeof(mMetaData)) { 1577655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGI("Metadata file is %zd bytes (%zd experted); upgrade?", fileLength, 1578655b958eb2180c7c06889f83f606d23421bf038cKenny Root sizeof(mMetaData)); 1579655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1580655b958eb2180c7c06889f83f606d23421bf038cKenny Root close(in); 158170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 158270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1583655b958eb2180c7c06889f83f606d23421bf038cKenny Root void writeMetaData() { 1584655b958eb2180c7c06889f83f606d23421bf038cKenny Root const char* tmpFileName = ".metadata.tmp"; 1585655b958eb2180c7c06889f83f606d23421bf038cKenny Root int out = TEMP_FAILURE_RETRY(open(tmpFileName, 1586655b958eb2180c7c06889f83f606d23421bf038cKenny Root O_WRONLY | O_TRUNC | O_CREAT, S_IRUSR | S_IWUSR)); 1587655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (out < 0) { 1588655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGE("couldn't write metadata file: %s", strerror(errno)); 1589655b958eb2180c7c06889f83f606d23421bf038cKenny Root return; 1590655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1591655b958eb2180c7c06889f83f606d23421bf038cKenny Root size_t fileLength = writeFully(out, (uint8_t*) &mMetaData, sizeof(mMetaData)); 1592655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (fileLength != sizeof(mMetaData)) { 1593655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGI("Could only write %zd bytes to metadata file (%zd expected)", fileLength, 1594655b958eb2180c7c06889f83f606d23421bf038cKenny Root sizeof(mMetaData)); 159570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 1596655b958eb2180c7c06889f83f606d23421bf038cKenny Root close(out); 1597655b958eb2180c7c06889f83f606d23421bf038cKenny Root rename(tmpFileName, sMetaDataFile); 159870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 159970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1600655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool upgradeKeystore() { 1601655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool upgraded = false; 1602655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1603655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (mMetaData.version == 0) { 160472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* userState = getUserStateByUid(0); 1605655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1606655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Initialize first so the directory is made. 1607655b958eb2180c7c06889f83f606d23421bf038cKenny Root userState->initialize(); 1608655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1609655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Migrate the old .masterkey file to user 0. 1610655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(sOldMasterKey, R_OK) == 0) { 1611655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (rename(sOldMasterKey, userState->getMasterKeyFileName()) < 0) { 1612655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGE("couldn't migrate old masterkey: %s", strerror(errno)); 1613655b958eb2180c7c06889f83f606d23421bf038cKenny Root return false; 1614655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1615655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1616655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1617655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Initialize again in case we had a key. 1618655b958eb2180c7c06889f83f606d23421bf038cKenny Root userState->initialize(); 1619655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1620655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Try to migrate existing keys. 1621655b958eb2180c7c06889f83f606d23421bf038cKenny Root DIR* dir = opendir("."); 1622655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!dir) { 1623655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Give up now; maybe we can upgrade later. 1624655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGE("couldn't open keystore's directory; something is wrong"); 1625655b958eb2180c7c06889f83f606d23421bf038cKenny Root return false; 1626655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1627655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1628655b958eb2180c7c06889f83f606d23421bf038cKenny Root struct dirent* file; 1629655b958eb2180c7c06889f83f606d23421bf038cKenny Root while ((file = readdir(dir)) != NULL) { 1630655b958eb2180c7c06889f83f606d23421bf038cKenny Root // We only care about files. 1631655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (file->d_type != DT_REG) { 1632655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1633655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1634655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1635655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Skip anything that starts with a "." 1636655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (file->d_name[0] == '.') { 1637655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1638655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1639655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1640655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Find the current file's user. 1641655b958eb2180c7c06889f83f606d23421bf038cKenny Root char* end; 1642655b958eb2180c7c06889f83f606d23421bf038cKenny Root unsigned long thisUid = strtoul(file->d_name, &end, 10); 1643655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (end[0] != '_' || end[1] == 0) { 1644655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1645655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 164672593ee807e89239d98ae08d32c733ecc08203baChad Brubaker UserState* otherUser = getUserStateByUid(thisUid); 1647655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (otherUser->getUserId() != 0) { 1648655b958eb2180c7c06889f83f606d23421bf038cKenny Root unlinkat(dirfd(dir), file->d_name, 0); 1649655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1650655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1651655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Rename the file into user directory. 1652655b958eb2180c7c06889f83f606d23421bf038cKenny Root DIR* otherdir = opendir(otherUser->getUserDirName()); 1653655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (otherdir == NULL) { 1654655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("couldn't open user directory for rename"); 1655655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1656655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1657655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (renameat(dirfd(dir), file->d_name, dirfd(otherdir), file->d_name) < 0) { 1658655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("couldn't rename blob: %s: %s", file->d_name, strerror(errno)); 1659655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1660655b958eb2180c7c06889f83f606d23421bf038cKenny Root closedir(otherdir); 1661655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1662655b958eb2180c7c06889f83f606d23421bf038cKenny Root closedir(dir); 1663655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1664655b958eb2180c7c06889f83f606d23421bf038cKenny Root mMetaData.version = 1; 1665655b958eb2180c7c06889f83f606d23421bf038cKenny Root upgraded = true; 1666655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1667655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1668655b958eb2180c7c06889f83f606d23421bf038cKenny Root return upgraded; 166970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 1670655b958eb2180c7c06889f83f606d23421bf038cKenny Root}; 167170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1672655b958eb2180c7c06889f83f606d23421bf038cKenny Rootconst char* KeyStore::sOldMasterKey = ".masterkey"; 1673655b958eb2180c7c06889f83f606d23421bf038cKenny Rootconst char* KeyStore::sMetaDataFile = ".metadata"; 167470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 16751b0e3933900c7ea21189704d5db64e7346aee7afKenny Rootconst android::String16 KeyStore::sRSAKeyType("RSA"); 16761b0e3933900c7ea21189704d5db64e7346aee7afKenny Root 167707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootnamespace android { 167807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootclass KeyStoreProxy : public BnKeystoreService, public IBinder::DeathRecipient { 167907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootpublic: 168007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root KeyStoreProxy(KeyStore* keyStore) 168140a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker : mKeyStore(keyStore), 168240a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker mOperationMap(this) 168307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root { 168407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1685a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 168640a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker void binderDied(const wp<IBinder>& who) { 168740a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker auto operations = mOperationMap.getOperationsForToken(who.unsafe_get()); 168840a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker for (auto token: operations) { 168940a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker abort(token); 169040a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 169107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1692a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1693e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker int32_t getState(int32_t userId) { 1694e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker if (!checkBinderPermission(P_GET_STATE)) { 169507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 169607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1697a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1698e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker return mKeyStore->getState(userId); 1699a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1700a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 170107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t get(const String16& name, uint8_t** item, size_t* itemLength) { 17029489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_GET)) { 170307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 170407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1705a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 17069489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker uid_t callingUid = IPCThreadState::self()->getCallingUid(); 170707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 170807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root Blob keyBlob; 170966dbf67dd65b4808a15ef64f0ffde1275bdd58a9Nick Kralevich 1710655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode responseCode = mKeyStore->getKeyForName(&keyBlob, name8, callingUid, 1711494689083467ec372a58f094f041c8f102f39393Kenny Root TYPE_GENERIC); 171207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (responseCode != ::NO_ERROR) { 1713655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("Could not read %s", name8.string()); 171407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *item = NULL; 171507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *itemLength = 0; 171607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return responseCode; 171707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 171807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 171907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *item = (uint8_t*) malloc(keyBlob.getLength()); 172007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root memcpy(*item, keyBlob.getValue(), keyBlob.getLength()); 172107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *itemLength = keyBlob.getLength(); 172207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 172307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 1724a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1725a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1726f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root int32_t insert(const String16& name, const uint8_t* item, size_t itemLength, int targetUid, 1727f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root int32_t flags) { 17289489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker targetUid = getEffectiveUid(targetUid); 17299489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker int32_t result = checkBinderPermissionAndKeystoreState(P_INSERT, targetUid, 17309489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker flags & KEYSTORE_FLAG_ENCRYPTED); 17319489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (result != ::NO_ERROR) { 17329489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return result; 1733b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root } 1734b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root 173507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 1736655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid)); 173707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 173807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root Blob keyBlob(item, itemLength, NULL, 0, ::TYPE_GENERIC); 1739ee8068b9e7bfb2770635062fc9c2035be2142bd8Kenny Root keyBlob.setEncrypted(flags & KEYSTORE_FLAG_ENCRYPTED); 1740ee8068b9e7bfb2770635062fc9c2035be2142bd8Kenny Root 174172593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->put(filename.string(), &keyBlob, get_user_id(targetUid)); 1742a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1743a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1744494689083467ec372a58f094f041c8f102f39393Kenny Root int32_t del(const String16& name, int targetUid) { 17459489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker targetUid = getEffectiveUid(targetUid); 17469489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_DELETE, targetUid)) { 1747b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root return ::PERMISSION_DENIED; 1748b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root } 174907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 1750655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid)); 175172593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->del(filename.string(), ::TYPE_ANY, get_user_id(targetUid)); 1752298e7b1b0f9116e2054d594d7538379d86585035Kenny Root } 1753298e7b1b0f9116e2054d594d7538379d86585035Kenny Root 1754494689083467ec372a58f094f041c8f102f39393Kenny Root int32_t exist(const String16& name, int targetUid) { 17559489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker targetUid = getEffectiveUid(targetUid); 17569489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_EXIST, targetUid)) { 1757b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root return ::PERMISSION_DENIED; 1758b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root } 1759b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root 176007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 1761655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid)); 176207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 1763655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(filename.string(), R_OK) == -1) { 176407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return (errno != ENOENT) ? ::SYSTEM_ERROR : ::KEY_NOT_FOUND; 176507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 176607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 1767298e7b1b0f9116e2054d594d7538379d86585035Kenny Root } 1768298e7b1b0f9116e2054d594d7538379d86585035Kenny Root 1769e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker int32_t list(const String16& prefix, int targetUid, Vector<String16>* matches) { 17709489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker targetUid = getEffectiveUid(targetUid); 1771e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker if (!checkBinderPermission(P_LIST, targetUid)) { 1772b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root return ::PERMISSION_DENIED; 1773b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root } 177407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const String8 prefix8(prefix); 1775655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUid(prefix8, targetUid)); 177607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 1777e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker if (mKeyStore->list(filename, matches, get_user_id(targetUid)) != ::NO_ERROR) { 17784b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return ::SYSTEM_ERROR; 177907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 178007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 1781298e7b1b0f9116e2054d594d7538379d86585035Kenny Root } 1782298e7b1b0f9116e2054d594d7538379d86585035Kenny Root 178307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t reset() { 17849489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_RESET)) { 178507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 178607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1787a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 17889489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker uid_t callingUid = IPCThreadState::self()->getCallingUid(); 178996d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker mKeyStore->resetUser(get_user_id(callingUid), false); 179096d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker return ::NO_ERROR; 1791a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1792a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 179396d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker int32_t onUserPasswordChanged(int32_t userId, const String16& password) { 17949489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_PASSWORD)) { 179507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 179607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1797a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 179807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const String8 password8(password); 179996d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker // Flush the auth token table to prevent stale tokens from sticking 180096d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker // around. 180196d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker mAuthTokenTable.Clear(); 180296d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker 180396d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker if (password.size() == 0) { 180496d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker ALOGI("Secure lockscreen for user %d removed, deleting encrypted entries", userId); 180572593ee807e89239d98ae08d32c733ecc08203baChad Brubaker mKeyStore->resetUser(userId, true); 180696d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker return ::NO_ERROR; 180796d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } else { 180872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker switch (mKeyStore->getState(userId)) { 180996d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker case ::STATE_UNINITIALIZED: { 181096d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker // generate master key, encrypt with password, write to file, 181196d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker // initialize mMasterKey*. 181272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->initializeUser(password8, userId); 181396d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 181496d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker case ::STATE_NO_ERROR: { 181596d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker // rewrite master key with new password. 181672593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->writeMasterKey(password8, userId); 181796d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 181896d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker case ::STATE_LOCKED: { 181996d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker ALOGE("Changing user %d's password while locked, clearing old encryption", 182096d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker userId); 182172593ee807e89239d98ae08d32c733ecc08203baChad Brubaker mKeyStore->resetUser(userId, true); 182272593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->initializeUser(password8, userId); 182396d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker } 182407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 182596d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker return ::SYSTEM_ERROR; 182607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 182707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1828a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1829c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker int32_t onUserAdded(int32_t userId, int32_t parentId) { 1830c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker if (!checkBinderPermission(P_USER_CHANGED)) { 1831c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker return ::PERMISSION_DENIED; 1832c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker } 1833c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker 1834c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker // Sanity check that the new user has an empty keystore. 1835c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker if (!mKeyStore->isEmpty(userId)) { 1836c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker ALOGW("New user %d's keystore not empty. Clearing old entries.", userId); 1837c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker } 1838c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker // Unconditionally clear the keystore, just to be safe. 1839c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker mKeyStore->resetUser(userId, false); 1840c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker 1841c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker // If the user has a parent user then use the parent's 1842c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker // masterkey/password, otherwise there's nothing to do. 1843c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker if (parentId != -1) { 1844c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker return mKeyStore->copyMasterKey(parentId, userId); 1845c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker } else { 1846c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker return ::NO_ERROR; 1847c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker } 1848c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker } 1849c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker 1850c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker int32_t onUserRemoved(int32_t userId) { 1851c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker if (!checkBinderPermission(P_USER_CHANGED)) { 1852c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker return ::PERMISSION_DENIED; 1853c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker } 1854c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker 1855c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker mKeyStore->resetUser(userId, false); 1856c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker return ::NO_ERROR; 1857c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker } 1858c0f031a867a6c3fa05732fcd72bd284d56073cf8Chad Brubaker 1859e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker int32_t lock(int32_t userId) { 18609489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_LOCK)) { 186107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 186207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 186307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 186472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker State state = mKeyStore->getState(userId); 18659d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root if (state != ::STATE_NO_ERROR) { 186607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ALOGD("calling lock in state: %d", state); 186707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return state; 186807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 186970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 187072593ee807e89239d98ae08d32c733ecc08203baChad Brubaker mKeyStore->lock(userId); 187107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 187270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 1873a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 187496d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker int32_t unlock(int32_t userId, const String16& pw) { 18759489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_UNLOCK)) { 187607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 187707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 187807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 187972593ee807e89239d98ae08d32c733ecc08203baChad Brubaker State state = mKeyStore->getState(userId); 18809d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root if (state != ::STATE_LOCKED) { 188196d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker ALOGI("calling unlock when not locked, ignoring."); 188207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return state; 188307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 188407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 188507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const String8 password8(pw); 188696d6d7868303ad87f1f408c40d3c44bcb39f561eChad Brubaker // read master key, decrypt with password, initialize mMasterKey*. 188772593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->readMasterKey(password8, userId); 188870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 188970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1890e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker bool isEmpty(int32_t userId) { 1891e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker if (!checkBinderPermission(P_IS_EMPTY)) { 1892e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker return false; 189307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 189470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1895e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker return mKeyStore->isEmpty(userId); 189670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 189770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 189896427baf0094d50047049d329b0779c3c910402cKenny Root int32_t generate(const String16& name, int32_t targetUid, int32_t keyType, int32_t keySize, 189996427baf0094d50047049d329b0779c3c910402cKenny Root int32_t flags, Vector<sp<KeystoreArg> >* args) { 19009489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker targetUid = getEffectiveUid(targetUid); 19019489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker int32_t result = checkBinderPermissionAndKeystoreState(P_INSERT, targetUid, 19029489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker flags & KEYSTORE_FLAG_ENCRYPTED); 19039489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (result != ::NO_ERROR) { 19049489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return result; 190507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 190670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 19073a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker KeymasterArguments params; 19083a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker addLegacyKeyAuthorizations(params.params); 190970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 19103a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker switch (keyType) { 19113a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker case EVP_PKEY_EC: { 19123a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.params.push_back(keymaster_param_enum(KM_TAG_ALGORITHM, KM_ALGORITHM_EC)); 19133a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (keySize == -1) { 19143a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker keySize = EC_DEFAULT_KEY_SIZE; 19153a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } else if (keySize < EC_MIN_KEY_SIZE || keySize > EC_MAX_KEY_SIZE) { 19163a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGI("invalid key size %d", keySize); 191796427baf0094d50047049d329b0779c3c910402cKenny Root return ::SYSTEM_ERROR; 191896427baf0094d50047049d329b0779c3c910402cKenny Root } 19193a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.params.push_back(keymaster_param_int(KM_TAG_KEY_SIZE, keySize)); 19203a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker break; 192196427baf0094d50047049d329b0779c3c910402cKenny Root } 19223a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker case EVP_PKEY_RSA: { 19233a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.params.push_back(keymaster_param_enum(KM_TAG_ALGORITHM, KM_ALGORITHM_RSA)); 19243a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (keySize == -1) { 19253a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker keySize = RSA_DEFAULT_KEY_SIZE; 19263a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } else if (keySize < RSA_MIN_KEY_SIZE || keySize > RSA_MAX_KEY_SIZE) { 19273a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGI("invalid key size %d", keySize); 19283a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::SYSTEM_ERROR; 19293a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 19303a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.params.push_back(keymaster_param_int(KM_TAG_KEY_SIZE, keySize)); 19313a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker unsigned long exponent = RSA_DEFAULT_EXPONENT; 19323a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (args->size() > 1) { 19333a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGI("invalid number of arguments: %zu", args->size()); 19343a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::SYSTEM_ERROR; 19353a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } else if (args->size() == 1) { 19363a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker sp<KeystoreArg> expArg = args->itemAt(0); 19373a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (expArg != NULL) { 19383a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker Unique_BIGNUM pubExpBn( 19393a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker BN_bin2bn(reinterpret_cast<const unsigned char*>(expArg->data()), 19403a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker expArg->size(), NULL)); 19413a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (pubExpBn.get() == NULL) { 19423a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGI("Could not convert public exponent to BN"); 19433a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::SYSTEM_ERROR; 19443a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 19453a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker exponent = BN_get_word(pubExpBn.get()); 19463a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (exponent == 0xFFFFFFFFL) { 19473a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("cannot represent public exponent as a long value"); 19483a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::SYSTEM_ERROR; 19493a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 19503a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } else { 19513a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("public exponent not read"); 195296427baf0094d50047049d329b0779c3c910402cKenny Root return ::SYSTEM_ERROR; 195396427baf0094d50047049d329b0779c3c910402cKenny Root } 195496427baf0094d50047049d329b0779c3c910402cKenny Root } 19553a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.params.push_back(keymaster_param_long(KM_TAG_RSA_PUBLIC_EXPONENT, 19563a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker exponent)); 19573a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker break; 19583a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 19593a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker default: { 19603a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("Unsupported key type %d", keyType); 19613a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::SYSTEM_ERROR; 196296427baf0094d50047049d329b0779c3c910402cKenny Root } 196396427baf0094d50047049d329b0779c3c910402cKenny Root } 196470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 19653a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker int32_t rc = generateKey(name, params, NULL, 0, targetUid, flags, 19663a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker /*outCharacteristics*/ NULL); 19673a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (rc != ::NO_ERROR) { 19683a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("generate failed: %d", rc); 196907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 19703a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return translateResultToLegacyResult(rc); 197170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 197270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1973f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root int32_t import(const String16& name, const uint8_t* data, size_t length, int targetUid, 1974f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root int32_t flags) { 19753a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker KeymasterArguments params; 19763a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker addLegacyKeyAuthorizations(params.params); 19773a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker const uint8_t* ptr = data; 19789a53d3eaf42104ddf02feeccec3cf7f5c1a34baeKenny Root 19793a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker Unique_PKCS8_PRIV_KEY_INFO pkcs8(d2i_PKCS8_PRIV_KEY_INFO(NULL, &ptr, length)); 19803a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (!pkcs8.get()) { 198107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::SYSTEM_ERROR; 198207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 19833a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker Unique_EVP_PKEY pkey(EVP_PKCS82PKEY(pkcs8.get())); 19843a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (!pkey.get()) { 198507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::SYSTEM_ERROR; 198607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 19873a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker int type = EVP_PKEY_type(pkey->type); 19883a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker switch (type) { 19893a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker case EVP_PKEY_RSA: 19903a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.params.push_back(keymaster_param_enum(KM_TAG_ALGORITHM, KM_ALGORITHM_RSA)); 19913a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker break; 19923a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker case EVP_PKEY_EC: 19933a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.params.push_back(keymaster_param_enum(KM_TAG_ALGORITHM, 19943a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker KM_ALGORITHM_EC)); 19953a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker break; 19963a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker default: 19973a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("Unsupported key type %d", type); 19983a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::SYSTEM_ERROR; 19993a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 20003a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker int32_t rc = importKey(name, params, KM_KEY_FORMAT_PKCS8, data, length, targetUid, flags, 20013a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker /*outCharacteristics*/ NULL); 20023a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (rc != ::NO_ERROR) { 20033a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("importKey failed: %d", rc); 200407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 20053a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return translateResultToLegacyResult(rc); 20063a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 200770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 20083a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker int32_t sign(const String16& name, const uint8_t* data, size_t length, uint8_t** out, 20093a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker size_t* outLength) { 20103a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (!checkBinderPermission(P_SIGN)) { 20113a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::PERMISSION_DENIED; 20123a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 20133a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return doLegacySignVerify(name, data, length, out, outLength, NULL, 0, KM_PURPOSE_SIGN); 201470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 201570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 201607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t verify(const String16& name, const uint8_t* data, size_t dataLength, 201707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const uint8_t* signature, size_t signatureLength) { 20189489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_VERIFY)) { 201907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 202007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 20213a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return doLegacySignVerify(name, data, dataLength, NULL, NULL, signature, signatureLength, 20223a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker KM_PURPOSE_VERIFY); 202370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 202470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 202507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root /* 202607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * TODO: The abstraction between things stored in hardware and regular blobs 202707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * of data stored on the filesystem should be moved down to keystore itself. 202807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * Unfortunately the Java code that calls this has naming conventions that it 202907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * knows about. Ideally keystore shouldn't be used to store random blobs of 203007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * data. 203107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * 203207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * Until that happens, it's necessary to have a separate "get_pubkey" and 203307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * "del_key" since the Java code doesn't really communicate what it's 203407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * intentions are. 203507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root */ 203607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t get_pubkey(const String16& name, uint8_t** pubkey, size_t* pubkeyLength) { 20373a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ExportResult result; 20383a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker exportKey(name, KM_KEY_FORMAT_X509, NULL, NULL, &result); 20393a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (result.resultCode != ::NO_ERROR) { 20403a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("export failed: %d", result.resultCode); 20413a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return translateResultToLegacyResult(result.resultCode); 204207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 2043344e0bc23ca46b9acec97ac8bcd87949bde0ccabKenny Root 20443a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker *pubkey = result.exportData.release(); 20453a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker *pubkeyLength = result.dataLength; 204607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 2047344e0bc23ca46b9acec97ac8bcd87949bde0ccabKenny Root } 2048344e0bc23ca46b9acec97ac8bcd87949bde0ccabKenny Root 204907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t grant(const String16& name, int32_t granteeUid) { 2050d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 20519489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker int32_t result = checkBinderPermissionAndKeystoreState(P_GRANT); 20529489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (result != ::NO_ERROR) { 20539489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return result; 205407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 205507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 205607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 2057655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, callingUid)); 205807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2059655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(filename.string(), R_OK) == -1) { 206007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return (errno != ENOENT) ? ::SYSTEM_ERROR : ::KEY_NOT_FOUND; 206107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 206207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2063655b958eb2180c7c06889f83f606d23421bf038cKenny Root mKeyStore->addGrant(filename.string(), granteeUid); 206407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 2065a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 206607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 206707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t ungrant(const String16& name, int32_t granteeUid) { 2068d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 20699489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker int32_t result = checkBinderPermissionAndKeystoreState(P_GRANT); 20709489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (result != ::NO_ERROR) { 20719489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return result; 207207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 207307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 207407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 2075655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, callingUid)); 207607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2077655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(filename.string(), R_OK) == -1) { 207807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return (errno != ENOENT) ? ::SYSTEM_ERROR : ::KEY_NOT_FOUND; 207907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 208007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2081655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mKeyStore->removeGrant(filename.string(), granteeUid) ? ::NO_ERROR : ::KEY_NOT_FOUND; 2082a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 208307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 208407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int64_t getmtime(const String16& name) { 2085d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 20869489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_GET)) { 2087d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: getmtime", callingUid); 208836a9e231e03734cd2143383d26388455c1764e17Kenny Root return -1L; 208907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 209007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 209107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 2092655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, callingUid)); 209307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2094655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(filename.string(), R_OK) == -1) { 2095655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("could not access %s for getmtime", filename.string()); 209636a9e231e03734cd2143383d26388455c1764e17Kenny Root return -1L; 2097a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 209807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2099655b958eb2180c7c06889f83f606d23421bf038cKenny Root int fd = TEMP_FAILURE_RETRY(open(filename.string(), O_NOFOLLOW, O_RDONLY)); 210007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (fd < 0) { 2101655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("could not open %s for getmtime", filename.string()); 210236a9e231e03734cd2143383d26388455c1764e17Kenny Root return -1L; 210307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 210407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 210507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root struct stat s; 210607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int ret = fstat(fd, &s); 210707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root close(fd); 210807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (ret == -1) { 2109655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("could not stat %s for getmtime", filename.string()); 211036a9e231e03734cd2143383d26388455c1764e17Kenny Root return -1L; 211107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 211207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 211336a9e231e03734cd2143383d26388455c1764e17Kenny Root return static_cast<int64_t>(s.st_mtime); 2114a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 211507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2116d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root int32_t duplicate(const String16& srcKey, int32_t srcUid, const String16& destKey, 2117d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root int32_t destUid) { 21180225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 2119eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 2120eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_DUPLICATE, spid)) { 2121d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root ALOGW("permission denied for %d: duplicate", callingUid); 21220225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root return -1L; 21230225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 21240225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 212572593ee807e89239d98ae08d32c733ecc08203baChad Brubaker State state = mKeyStore->getState(get_user_id(callingUid)); 21260225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root if (!isKeystoreUnlocked(state)) { 2127d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root ALOGD("calling duplicate in state: %d", state); 21280225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root return state; 21290225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 21300225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2131d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (srcUid == -1 || static_cast<uid_t>(srcUid) == callingUid) { 2132d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root srcUid = callingUid; 2133d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root } else if (!is_granted_to(callingUid, srcUid)) { 2134d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root ALOGD("migrate not granted from source: %d -> %d", callingUid, srcUid); 21350225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root return ::PERMISSION_DENIED; 21360225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 21370225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2138d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (destUid == -1) { 2139d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root destUid = callingUid; 2140d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root } 21410225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2142d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (srcUid != destUid) { 2143d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (static_cast<uid_t>(srcUid) != callingUid) { 2144d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root ALOGD("can only duplicate from caller to other or to same uid: " 2145d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root "calling=%d, srcUid=%d, destUid=%d", callingUid, srcUid, destUid); 2146d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root return ::PERMISSION_DENIED; 2147d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root } 21480225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2149d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (!is_granted_to(callingUid, destUid)) { 2150d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root ALOGD("duplicate not granted to dest: %d -> %d", callingUid, destUid); 2151d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root return ::PERMISSION_DENIED; 2152d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root } 21530225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 21540225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2155d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root String8 source8(srcKey); 2156655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 sourceFile(mKeyStore->getKeyNameForUidWithDir(source8, srcUid)); 2157d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root 2158d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root String8 target8(destKey); 2159fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root String8 targetFile(mKeyStore->getKeyNameForUidWithDir(target8, destUid)); 21600225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2161655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(targetFile.string(), W_OK) != -1 || errno != ENOENT) { 2162655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGD("destination already exists: %s", targetFile.string()); 21630225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root return ::SYSTEM_ERROR; 21640225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 21650225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2166d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root Blob keyBlob; 2167655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode responseCode = mKeyStore->get(sourceFile.string(), &keyBlob, TYPE_ANY, 216872593ee807e89239d98ae08d32c733ecc08203baChad Brubaker get_user_id(srcUid)); 2169d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (responseCode != ::NO_ERROR) { 2170d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root return responseCode; 21710225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 2172d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root 217372593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->put(targetFile.string(), &keyBlob, get_user_id(destUid)); 21740225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 21750225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 21761b0e3933900c7ea21189704d5db64e7346aee7afKenny Root int32_t is_hardware_backed(const String16& keyType) { 21771b0e3933900c7ea21189704d5db64e7346aee7afKenny Root return mKeyStore->isHardwareBacked(keyType) ? 1 : 0; 21788ddf35a6e1fd80a7d0685041d2bfc77078277c9dKenny Root } 21798ddf35a6e1fd80a7d0685041d2bfc77078277c9dKenny Root 2180fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root int32_t clear_uid(int64_t targetUid64) { 21819489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker uid_t targetUid = getEffectiveUid(targetUid64); 2182b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker if (!checkBinderPermissionSelfOrSystem(P_CLEAR_UID, targetUid)) { 2183a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root return ::PERMISSION_DENIED; 2184a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root } 2185a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root 21864b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee String8 prefix = String8::format("%u_", targetUid); 21874b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee Vector<String16> aliases; 2188e6c3bfa8d39c7addbfbac0b2df63b0067bb664d8Chad Brubaker if (mKeyStore->list(prefix, &aliases, get_user_id(targetUid)) != ::NO_ERROR) { 2189a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root return ::SYSTEM_ERROR; 2190a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root } 2191a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root 21924b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee for (uint32_t i = 0; i < aliases.size(); i++) { 21934b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee String8 name8(aliases[i]); 21944b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid)); 219572593ee807e89239d98ae08d32c733ecc08203baChad Brubaker mKeyStore->del(filename.string(), ::TYPE_ANY, get_user_id(targetUid)); 2196a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root } 21974b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return ::NO_ERROR; 2198a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root } 2199a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root 22009c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker int32_t addRngEntropy(const uint8_t* data, size_t dataLength) { 22019c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker const keymaster1_device_t* device = mKeyStore->getDevice(); 22029c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker const keymaster1_device_t* fallback = mKeyStore->getFallbackDevice(); 22039c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker int32_t devResult = KM_ERROR_UNIMPLEMENTED; 22049c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker int32_t fallbackResult = KM_ERROR_UNIMPLEMENTED; 22059c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker if (device->common.module->module_api_version >= KEYMASTER_MODULE_API_VERSION_1_0 && 22069c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker device->add_rng_entropy != NULL) { 22079c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker devResult = device->add_rng_entropy(device, data, dataLength); 22089c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker } 22099c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker if (fallback->add_rng_entropy) { 22109c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker fallbackResult = fallback->add_rng_entropy(fallback, data, dataLength); 22119c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker } 22129c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker if (devResult) { 22139c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker return devResult; 22149c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker } 22159c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker if (fallbackResult) { 22169c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker return fallbackResult; 22179c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker } 22189c8612c88dc03dc52d85e7a482453e04e7e3e2a2Chad Brubaker return ::NO_ERROR; 22199899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker } 22209899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker 222117d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker int32_t generateKey(const String16& name, const KeymasterArguments& params, 2222154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker const uint8_t* entropy, size_t entropyLength, int uid, int flags, 2223154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker KeyCharacteristics* outCharacteristics) { 22249489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker uid = getEffectiveUid(uid); 22259489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker int rc = checkBinderPermissionAndKeystoreState(P_INSERT, uid, 22269489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker flags & KEYSTORE_FLAG_ENCRYPTED); 22279489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (rc != ::NO_ERROR) { 22289489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return rc; 222917d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 223017d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker 22319489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker rc = KM_ERROR_UNIMPLEMENTED; 223217d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker bool isFallback = false; 223317d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker keymaster_key_blob_t blob; 223417d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker keymaster_key_characteristics_t *out = NULL; 223517d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker 223617d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker const keymaster1_device_t* device = mKeyStore->getDevice(); 223717d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker const keymaster1_device_t* fallback = mKeyStore->getFallbackDevice(); 223857e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker std::vector<keymaster_key_param_t> opParams(params.params); 223957e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker const keymaster_key_param_set_t inParams = {opParams.data(), opParams.size()}; 224017d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker if (device == NULL) { 224117d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker return ::SYSTEM_ERROR; 224217d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 2243154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker // TODO: Seed from Linux RNG before this. 224417d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker if (device->common.module->module_api_version >= KEYMASTER_MODULE_API_VERSION_1_0 && 224517d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker device->generate_key != NULL) { 2246154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker if (!entropy) { 2247154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker rc = KM_ERROR_OK; 2248154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } else if (device->add_rng_entropy) { 2249154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker rc = device->add_rng_entropy(device, entropy, entropyLength); 2250154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } else { 2251154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker rc = KM_ERROR_UNIMPLEMENTED; 2252154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } 2253154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker if (rc == KM_ERROR_OK) { 225457e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker rc = device->generate_key(device, &inParams, &blob, &out); 2255154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } 225617d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 225717d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker // If the HW device didn't support generate_key or generate_key failed 225817d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker // fall back to the software implementation. 225917d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker if (rc && fallback->generate_key != NULL) { 226017d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker isFallback = true; 2261154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker if (!entropy) { 2262154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker rc = KM_ERROR_OK; 2263154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } else if (fallback->add_rng_entropy) { 2264154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker rc = fallback->add_rng_entropy(fallback, entropy, entropyLength); 2265154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } else { 2266154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker rc = KM_ERROR_UNIMPLEMENTED; 2267154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } 2268154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker if (rc == KM_ERROR_OK) { 226957e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker rc = fallback->generate_key(fallback, &inParams, &blob, &out); 2270154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } 227117d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 227217d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker 227317d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker if (out) { 227417d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker if (outCharacteristics) { 227517d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker outCharacteristics->characteristics = *out; 227617d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } else { 227717d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker keymaster_free_characteristics(out); 227817d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 227917d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker free(out); 228017d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 228117d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker 228217d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker if (rc) { 228317d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker return rc; 228417d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker } 228517d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker 228617d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker String8 name8(name); 228717d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, uid)); 228817d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker 228917d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker Blob keyBlob(blob.key_material, blob.key_material_size, NULL, 0, ::TYPE_KEYMASTER_10); 229017d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker keyBlob.setFallback(isFallback); 229117d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker keyBlob.setEncrypted(flags & KEYSTORE_FLAG_ENCRYPTED); 229217d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker 229317d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker free(const_cast<uint8_t*>(blob.key_material)); 229417d68b9520e66226f1c7b2e1b3bd183ac80ca58bChad Brubaker 229572593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->put(filename.string(), &keyBlob, get_user_id(uid)); 22969899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker } 22979899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker 2298f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker int32_t getKeyCharacteristics(const String16& name, 2299d663442b590b59250062335cc057478001b8e439Chad Brubaker const keymaster_blob_t* clientId, 2300d663442b590b59250062335cc057478001b8e439Chad Brubaker const keymaster_blob_t* appData, 2301f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker KeyCharacteristics* outCharacteristics) { 2302f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker if (!outCharacteristics) { 2303f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker return KM_ERROR_UNEXPECTED_NULL_POINTER; 2304f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker } 2305f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker 2306f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker uid_t callingUid = IPCThreadState::self()->getCallingUid(); 2307f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker 2308f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker Blob keyBlob; 2309f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker String8 name8(name); 2310f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker int rc; 2311f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker 2312f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker ResponseCode responseCode = mKeyStore->getKeyForName(&keyBlob, name8, callingUid, 2313f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker TYPE_KEYMASTER_10); 2314f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker if (responseCode != ::NO_ERROR) { 2315f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker return responseCode; 2316f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker } 2317f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker keymaster_key_blob_t key; 2318f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker key.key_material_size = keyBlob.getLength(); 2319f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker key.key_material = keyBlob.getValue(); 2320f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker keymaster1_device_t* dev = mKeyStore->getDeviceForBlob(keyBlob); 2321f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker keymaster_key_characteristics_t *out = NULL; 2322f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker if (!dev->get_key_characteristics) { 2323f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker ALOGW("device does not implement get_key_characteristics"); 2324f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker return KM_ERROR_UNIMPLEMENTED; 2325f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker } 2326d663442b590b59250062335cc057478001b8e439Chad Brubaker rc = dev->get_key_characteristics(dev, &key, clientId, appData, &out); 2327f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker if (out) { 2328f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker outCharacteristics->characteristics = *out; 2329f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker free(out); 2330f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker } 2331f3f071fc5020fa5255f49e898a7c4a1cbf824a99Chad Brubaker return rc ? rc : ::NO_ERROR; 23329899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker } 23339899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker 23344c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker int32_t importKey(const String16& name, const KeymasterArguments& params, 23354c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker keymaster_key_format_t format, const uint8_t *keyData, 23364c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker size_t keyLength, int uid, int flags, 23374c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker KeyCharacteristics* outCharacteristics) { 23389489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker uid = getEffectiveUid(uid); 23399489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker int rc = checkBinderPermissionAndKeystoreState(P_INSERT, uid, 23409489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker flags & KEYSTORE_FLAG_ENCRYPTED); 23419489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (rc != ::NO_ERROR) { 23429489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return rc; 23434c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker } 23444c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker 23459489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker rc = KM_ERROR_UNIMPLEMENTED; 23464c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker bool isFallback = false; 23474c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker keymaster_key_blob_t blob; 23484c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker keymaster_key_characteristics_t *out = NULL; 23494c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker 23504c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker const keymaster1_device_t* device = mKeyStore->getDevice(); 23514c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker const keymaster1_device_t* fallback = mKeyStore->getFallbackDevice(); 235257e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker std::vector<keymaster_key_param_t> opParams(params.params); 235357e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker const keymaster_key_param_set_t inParams = {opParams.data(), opParams.size()}; 235457e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker const keymaster_blob_t input = {keyData, keyLength}; 23554c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker if (device == NULL) { 23564c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker return ::SYSTEM_ERROR; 23574c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker } 23584c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker if (device->common.module->module_api_version >= KEYMASTER_MODULE_API_VERSION_1_0 && 23594c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker device->import_key != NULL) { 236057e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker rc = device->import_key(device, &inParams, format,&input, &blob, &out); 23614c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker } 23624c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker if (rc && fallback->import_key != NULL) { 23634c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker isFallback = true; 236457e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker rc = fallback->import_key(fallback, &inParams, format, &input, &blob, &out); 23654c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker } 23664c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker if (out) { 23674c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker if (outCharacteristics) { 23684c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker outCharacteristics->characteristics = *out; 23694c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker } else { 23704c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker keymaster_free_characteristics(out); 23714c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker } 23724c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker free(out); 23734c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker } 23744c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker if (rc) { 23754c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker return rc; 23764c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker } 23774c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker 23784c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker String8 name8(name); 23794c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, uid)); 23804c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker 23814c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker Blob keyBlob(blob.key_material, blob.key_material_size, NULL, 0, ::TYPE_KEYMASTER_10); 23824c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker keyBlob.setFallback(isFallback); 23834c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker keyBlob.setEncrypted(flags & KEYSTORE_FLAG_ENCRYPTED); 23844c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker 23854c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker free((void*) blob.key_material); 23864c353cb98e52e2ea8f051b517fec064f1d3fa99fChad Brubaker 238772593ee807e89239d98ae08d32c733ecc08203baChad Brubaker return mKeyStore->put(filename.string(), &keyBlob, get_user_id(uid)); 23889899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker } 23899899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker 239007b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker void exportKey(const String16& name, keymaster_key_format_t format, 2391d663442b590b59250062335cc057478001b8e439Chad Brubaker const keymaster_blob_t* clientId, 2392d663442b590b59250062335cc057478001b8e439Chad Brubaker const keymaster_blob_t* appData, ExportResult* result) { 239307b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker 239407b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker uid_t callingUid = IPCThreadState::self()->getCallingUid(); 239507b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker 239607b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker Blob keyBlob; 239707b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker String8 name8(name); 239807b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker int rc; 239907b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker 240007b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker ResponseCode responseCode = mKeyStore->getKeyForName(&keyBlob, name8, callingUid, 240107b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker TYPE_KEYMASTER_10); 240207b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker if (responseCode != ::NO_ERROR) { 240307b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker result->resultCode = responseCode; 240407b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker return; 240507b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker } 240607b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker keymaster_key_blob_t key; 240707b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker key.key_material_size = keyBlob.getLength(); 240807b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker key.key_material = keyBlob.getValue(); 240907b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker keymaster1_device_t* dev = mKeyStore->getDeviceForBlob(keyBlob); 241007b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker if (!dev->export_key) { 241107b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker result->resultCode = KM_ERROR_UNIMPLEMENTED; 241207b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker return; 241307b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker } 241457e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_blob_t output = {NULL, 0}; 241557e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker rc = dev->export_key(dev, format, &key, clientId, appData, &output); 241657e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->exportData.reset(const_cast<uint8_t*>(output.data)); 241757e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->dataLength = output.data_length; 241807b0cda3b14d16205ce3040d00bc18d15eda5fdcChad Brubaker result->resultCode = rc ? rc : ::NO_ERROR; 24199899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker } 24209899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker 2421ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker 242240a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker void begin(const sp<IBinder>& appToken, const String16& name, keymaster_purpose_t purpose, 2423154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker bool pruneable, const KeymasterArguments& params, const uint8_t* entropy, 242457e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker size_t entropyLength, OperationResult* result) { 242540a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker uid_t callingUid = IPCThreadState::self()->getCallingUid(); 242640a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker if (!pruneable && get_app_id(callingUid) != AID_SYSTEM) { 242740a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker ALOGE("Non-system uid %d trying to start non-pruneable operation", callingUid); 242840a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->resultCode = ::PERMISSION_DENIED; 242940a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker return; 243040a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 24310cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (!checkAllowedOperationParams(params.params)) { 24320cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker result->resultCode = KM_ERROR_INVALID_ARGUMENT; 24330cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return; 24340cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 243540a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker Blob keyBlob; 243640a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker String8 name8(name); 243740a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker ResponseCode responseCode = mKeyStore->getKeyForName(&keyBlob, name8, callingUid, 243840a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker TYPE_KEYMASTER_10); 243940a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker if (responseCode != ::NO_ERROR) { 244040a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->resultCode = responseCode; 244140a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker return; 244240a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 244340a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker keymaster_key_blob_t key; 244440a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker key.key_material_size = keyBlob.getLength(); 244540a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker key.key_material = keyBlob.getValue(); 244640a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker keymaster_operation_handle_t handle; 244740a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker keymaster1_device_t* dev = mKeyStore->getDeviceForBlob(keyBlob); 2448154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker keymaster_error_t err = KM_ERROR_UNIMPLEMENTED; 244906801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker std::vector<keymaster_key_param_t> opParams(params.params); 2450ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker Unique_keymaster_key_characteristics characteristics; 2451ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker characteristics.reset(new keymaster_key_characteristics_t); 2452ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker err = getOperationCharacteristics(key, dev, opParams, characteristics.get()); 2453ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker if (err) { 2454ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker result->resultCode = err; 2455ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker return; 2456ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker } 24570cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const hw_auth_token_t* authToken = NULL; 2458b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden int32_t authResult = getAuthToken(characteristics.get(), 0, purpose, &authToken, 245906801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker /*failOnTokenMissing*/ false); 24600cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker // If per-operation auth is needed we need to begin the operation and 24610cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker // the client will need to authorize that operation before calling 24620cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker // update. Any other auth issues stop here. 24630cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (authResult != ::NO_ERROR && authResult != ::OP_AUTH_NEEDED) { 24640cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker result->resultCode = authResult; 246506801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker return; 246606801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker } 24670cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker addAuthToParams(&opParams, authToken); 2468154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker // Add entropy to the device first. 2469154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker if (entropy) { 2470154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker if (dev->add_rng_entropy) { 2471154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker err = dev->add_rng_entropy(dev, entropy, entropyLength); 2472154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } else { 2473154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker err = KM_ERROR_UNIMPLEMENTED; 2474154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } 2475154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker if (err) { 2476154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker result->resultCode = err; 2477154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker return; 2478154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } 2479154d7699cc30ef5156d6497258c4dd350fcb1286Chad Brubaker } 248057e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_key_param_set_t inParams = {opParams.data(), opParams.size()}; 248157e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_key_param_set_t outParams = {NULL, 0}; 248257e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker err = dev->begin(dev, purpose, &key, &inParams, &outParams, &handle); 248340a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker 24849221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden // Create a keyid for this key. 24859221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::km_id_t keyid; 24869221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (!enforcement_policy.CreateKeyId(key, &keyid)) { 24879221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden ALOGE("Failed to create a key ID for authorization checking."); 24889221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden result->resultCode = KM_ERROR_UNKNOWN_ERROR; 24899221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden return; 24909221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden } 24919221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden 24929221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden // Check that all key authorization policy requirements are met. 24939221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::AuthorizationSet key_auths(characteristics->hw_enforced); 24949221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden key_auths.push_back(characteristics->sw_enforced); 24959221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::AuthorizationSet operation_params(inParams); 24969221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden err = enforcement_policy.AuthorizeOperation(purpose, keyid, key_auths, operation_params, 24979221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden 0 /* op_handle */, 24989221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden true /* is_begin_operation */); 24999221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (err) { 25009221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden result->resultCode = err; 25019221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden return; 25029221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden } 25039221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden 250440a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker // If there are too many operations abort the oldest operation that was 250540a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker // started as pruneable and try again. 250640a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker while (err == KM_ERROR_TOO_MANY_OPERATIONS && mOperationMap.hasPruneableOperation()) { 250740a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker sp<IBinder> oldest = mOperationMap.getOldestPruneableOperation(); 250840a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker ALOGD("Ran out of operation handles, trying to prune %p", oldest.get()); 250940a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker if (abort(oldest) != ::NO_ERROR) { 251040a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker break; 251140a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 251257e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker err = dev->begin(dev, purpose, &key, &inParams, &outParams, &handle); 251340a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 251440a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker if (err) { 251540a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->resultCode = err; 251640a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker return; 251740a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 25189899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker 25199221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden sp<IBinder> operationToken = mOperationMap.addOperation(handle, keyid, purpose, dev, 25209221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden appToken, characteristics.release(), 252106801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker pruneable); 25220cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (authToken) { 25230cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker mOperationMap.setOperationAuthToken(operationToken, authToken); 25240cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 25250cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker // Return the authentication lookup result. If this is a per operation 25260cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker // auth'd key then the resultCode will be ::OP_AUTH_NEEDED and the 25270cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker // application should get an auth token using the handle before the 25280cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker // first call to update, which will fail if keystore hasn't received the 25290cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker // auth token. 25300cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker result->resultCode = authResult; 253140a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->token = operationToken; 2532c3a1856bbe2e39d5b3430f5f088b12fd710a159fChad Brubaker result->handle = handle; 253357e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker if (outParams.params) { 253457e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->outParams.params.assign(outParams.params, outParams.params + outParams.length); 253557e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker free(outParams.params); 253657e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker } 25379899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker } 25389899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker 253940a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker void update(const sp<IBinder>& token, const KeymasterArguments& params, const uint8_t* data, 254040a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker size_t dataLength, OperationResult* result) { 25410cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (!checkAllowedOperationParams(params.params)) { 25420cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker result->resultCode = KM_ERROR_INVALID_ARGUMENT; 25430cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return; 25440cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 254540a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker const keymaster1_device_t* dev; 254640a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker keymaster_operation_handle_t handle; 2547b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden keymaster_purpose_t purpose; 25489221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::km_id_t keyid; 25499221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden const keymaster_key_characteristics_t* characteristics; 25509221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (!mOperationMap.getOperation(token, &handle, &keyid, &purpose, &dev, &characteristics)) { 255140a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->resultCode = KM_ERROR_INVALID_OPERATION_HANDLE; 255240a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker return; 255340a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 255406801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker std::vector<keymaster_key_param_t> opParams(params.params); 25550cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker int32_t authResult = addOperationAuthTokenIfNeeded(token, &opParams); 25560cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (authResult != ::NO_ERROR) { 255706801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker result->resultCode = authResult; 255806801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker return; 255906801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker } 256057e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_key_param_set_t inParams = {opParams.data(), opParams.size()}; 256157e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_blob_t input = {data, dataLength}; 256257e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker size_t consumed = 0; 256357e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_blob_t output = {NULL, 0}; 256457e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_key_param_set_t outParams = {NULL, 0}; 256557e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker 25669221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden // Check that all key authorization policy requirements are met. 25679221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::AuthorizationSet key_auths(characteristics->hw_enforced); 25689221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden key_auths.push_back(characteristics->sw_enforced); 25699221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::AuthorizationSet operation_params(inParams); 25709221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden result->resultCode = 25719221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden enforcement_policy.AuthorizeOperation(purpose, keyid, key_auths, 25729221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden operation_params, handle, 25739221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden false /* is_begin_operation */); 25749221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (result->resultCode) { 25759221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden return; 25769221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden } 25779221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden 257857e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_error_t err = dev->update(dev, handle, &inParams, &input, &consumed, &outParams, 257957e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker &output); 258057e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->data.reset(const_cast<uint8_t*>(output.data)); 258157e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->dataLength = output.data_length; 258240a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->inputConsumed = consumed; 258340a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->resultCode = err ? (int32_t) err : ::NO_ERROR; 258457e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker if (outParams.params) { 258557e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->outParams.params.assign(outParams.params, outParams.params + outParams.length); 258657e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker free(outParams.params); 258757e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker } 258840a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 258940a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker 259040a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker void finish(const sp<IBinder>& token, const KeymasterArguments& params, 25910d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker const uint8_t* signature, size_t signatureLength, 25920d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker const uint8_t* entropy, size_t entropyLength, OperationResult* result) { 25930cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (!checkAllowedOperationParams(params.params)) { 25940cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker result->resultCode = KM_ERROR_INVALID_ARGUMENT; 25950cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return; 25960cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 259740a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker const keymaster1_device_t* dev; 259840a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker keymaster_operation_handle_t handle; 2599b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden keymaster_purpose_t purpose; 26009221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::km_id_t keyid; 26019221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden const keymaster_key_characteristics_t* characteristics; 26029221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (!mOperationMap.getOperation(token, &handle, &keyid, &purpose, &dev, &characteristics)) { 260340a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->resultCode = KM_ERROR_INVALID_OPERATION_HANDLE; 260440a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker return; 260540a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 260606801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker std::vector<keymaster_key_param_t> opParams(params.params); 26070cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker int32_t authResult = addOperationAuthTokenIfNeeded(token, &opParams); 26080cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (authResult != ::NO_ERROR) { 260906801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker result->resultCode = authResult; 261006801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker return; 261106801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker } 26120d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker keymaster_error_t err; 26130d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker if (entropy) { 26140d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker if (dev->add_rng_entropy) { 26150d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker err = dev->add_rng_entropy(dev, entropy, entropyLength); 26160d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker } else { 26170d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker err = KM_ERROR_UNIMPLEMENTED; 26180d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker } 26190d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker if (err) { 26200d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker result->resultCode = err; 26210d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker return; 26220d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker } 26230d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker } 26240cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker 262557e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_key_param_set_t inParams = {opParams.data(), opParams.size()}; 262657e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_blob_t input = {signature, signatureLength}; 262757e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_blob_t output = {NULL, 0}; 262857e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker keymaster_key_param_set_t outParams = {NULL, 0}; 26299221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden 26309221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden // Check that all key authorization policy requirements are met. 26319221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::AuthorizationSet key_auths(characteristics->hw_enforced); 26329221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden key_auths.push_back(characteristics->sw_enforced); 26339221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::AuthorizationSet operation_params(inParams); 26349221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden err = enforcement_policy.AuthorizeOperation(purpose, keyid, key_auths, operation_params, 26359221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden handle, false /* is_begin_operation */); 26369221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (err) { 26379221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden result->resultCode = err; 26389221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden return; 26399221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden } 26409221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden 26410d33e0babec356b1e69f1f15e8d9fe2ad878762cChad Brubaker err = dev->finish(dev, handle, &inParams, &input, &outParams, &output); 264240a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker // Remove the operation regardless of the result 264340a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker mOperationMap.removeOperation(token); 264406801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker mAuthTokenTable.MarkCompleted(handle); 264557e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker 264657e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->data.reset(const_cast<uint8_t*>(output.data)); 264757e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->dataLength = output.data_length; 264840a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker result->resultCode = err ? (int32_t) err : ::NO_ERROR; 264957e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker if (outParams.params) { 265057e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker result->outParams.params.assign(outParams.params, outParams.params + outParams.length); 265157e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker free(outParams.params); 265257e106dc183744cdc05c62bea11bc285b3346846Chad Brubaker } 265340a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 265440a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker 265540a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker int32_t abort(const sp<IBinder>& token) { 265640a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker const keymaster1_device_t* dev; 265740a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker keymaster_operation_handle_t handle; 2658b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden keymaster_purpose_t purpose; 26599221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::km_id_t keyid; 26609221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (!mOperationMap.getOperation(token, &handle, &keyid, &purpose, &dev, NULL)) { 266140a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker return KM_ERROR_INVALID_OPERATION_HANDLE; 266240a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 266340a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker mOperationMap.removeOperation(token); 266406801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker int32_t rc; 266540a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker if (!dev->abort) { 266606801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker rc = KM_ERROR_UNIMPLEMENTED; 266706801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker } else { 266806801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker rc = dev->abort(dev, handle); 266940a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 267006801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker mAuthTokenTable.MarkCompleted(handle); 267140a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker if (rc) { 267240a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker return rc; 267340a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker } 267440a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker return ::NO_ERROR; 26759899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker } 26769899d6b392e8223c3c00bfccadd43b18cdc96b4fChad Brubaker 26772ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker bool isOperationAuthorized(const sp<IBinder>& token) { 26782ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker const keymaster1_device_t* dev; 26792ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker keymaster_operation_handle_t handle; 2680ad6514ab7a57504aa3b04bcc383f60940b923710Chad Brubaker const keymaster_key_characteristics_t* characteristics; 2681b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden keymaster_purpose_t purpose; 26829221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::km_id_t keyid; 26839221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (!mOperationMap.getOperation(token, &handle, &keyid, &purpose, &dev, &characteristics)) { 26842ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker return false; 26852ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker } 26860cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const hw_auth_token_t* authToken = NULL; 26870cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker mOperationMap.getOperationAuthToken(token, &authToken); 268806801e0a7ccabbe8f22cff29b7edb7c7d02d7692Chad Brubaker std::vector<keymaster_key_param_t> ignored; 26890cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker int32_t authResult = addOperationAuthTokenIfNeeded(token, &ignored); 26900cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return authResult == ::NO_ERROR; 26912ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker } 26922ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker 2693d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker int32_t addAuthToken(const uint8_t* token, size_t length) { 26949489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(P_ADD_AUTH)) { 26959489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker ALOGW("addAuthToken: permission denied for %d", 26969489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker IPCThreadState::self()->getCallingUid()); 2697d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker return ::PERMISSION_DENIED; 2698d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker } 2699d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker if (length != sizeof(hw_auth_token_t)) { 2700d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker return KM_ERROR_INVALID_ARGUMENT; 2701d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker } 2702d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker hw_auth_token_t* authToken = new hw_auth_token_t; 2703d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker memcpy(reinterpret_cast<void*>(authToken), token, sizeof(hw_auth_token_t)); 2704d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker // The table takes ownership of authToken. 2705d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker mAuthTokenTable.AddAuthenticationToken(authToken); 2706d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker return ::NO_ERROR; 27072ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker } 27082ed2baa7de690b09430b40625e6b18d10757a2fdChad Brubaker 270907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootprivate: 27109489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker static const int32_t UID_SELF = -1; 27119489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker 27129489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker /** 27139489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * Get the effective target uid for a binder operation that takes an 27149489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * optional uid as the target. 27159489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker */ 27169489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker inline uid_t getEffectiveUid(int32_t targetUid) { 27179489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (targetUid == UID_SELF) { 27189489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return IPCThreadState::self()->getCallingUid(); 27199489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 27209489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return static_cast<uid_t>(targetUid); 27219489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 27229489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker 27239489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker /** 27249489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * Check if the caller of the current binder method has the required 27259489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * permission and if acting on other uids the grants to do so. 27269489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker */ 27279489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker inline bool checkBinderPermission(perm_t permission, int32_t targetUid = UID_SELF) { 27289489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker uid_t callingUid = IPCThreadState::self()->getCallingUid(); 27299489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker pid_t spid = IPCThreadState::self()->getCallingPid(); 27309489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!has_permission(callingUid, permission, spid)) { 27319489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker ALOGW("permission %s denied for %d", get_perm_label(permission), callingUid); 27329489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return false; 27339489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 27349489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!is_granted_to(callingUid, getEffectiveUid(targetUid))) { 27359489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker ALOGW("uid %d not granted to act for %d", callingUid, targetUid); 27369489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return false; 27379489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 27389489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return true; 27399489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 27409489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker 27419489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker /** 27429489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * Check if the caller of the current binder method has the required 2743b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker * permission and the target uid is the caller or the caller is system. 2744b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker */ 2745b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker inline bool checkBinderPermissionSelfOrSystem(perm_t permission, int32_t targetUid) { 2746b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker uid_t callingUid = IPCThreadState::self()->getCallingUid(); 2747b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker pid_t spid = IPCThreadState::self()->getCallingPid(); 2748b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker if (!has_permission(callingUid, permission, spid)) { 2749b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker ALOGW("permission %s denied for %d", get_perm_label(permission), callingUid); 2750b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker return false; 2751b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker } 2752b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker return getEffectiveUid(targetUid) == callingUid || callingUid == AID_SYSTEM; 2753b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker } 2754b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker 2755b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker /** 2756b37a52337f001f8a43f7cbb64203dba78560ee6bChad Brubaker * Check if the caller of the current binder method has the required 27579489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * permission or the target of the operation is the caller's uid. This is 27589489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * for operation where the permission is only for cross-uid activity and all 27599489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * uids are allowed to act on their own (ie: clearing all entries for a 27609489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * given uid). 27619489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker */ 27629489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker inline bool checkBinderPermissionOrSelfTarget(perm_t permission, int32_t targetUid) { 27639489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker uid_t callingUid = IPCThreadState::self()->getCallingUid(); 27649489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (getEffectiveUid(targetUid) == callingUid) { 27659489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return true; 27669489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } else { 27679489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return checkBinderPermission(permission, targetUid); 27689489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 27699489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 27709489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker 27719489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker /** 27729489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * Helper method to check that the caller has the required permission as 27739489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * well as the keystore is in the unlocked state if checkUnlocked is true. 27749489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * 27759489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * Returns NO_ERROR on success, PERMISSION_DENIED on a permission error and 27769489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * otherwise the state of keystore when not unlocked and checkUnlocked is 27779489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker * true. 27789489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker */ 27799489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker inline int32_t checkBinderPermissionAndKeystoreState(perm_t permission, int32_t targetUid = -1, 27809489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker bool checkUnlocked = true) { 27819489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (!checkBinderPermission(permission, targetUid)) { 27829489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return ::PERMISSION_DENIED; 27839489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 278472593ee807e89239d98ae08d32c733ecc08203baChad Brubaker State state = mKeyStore->getState(get_user_id(getEffectiveUid(targetUid))); 27859489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker if (checkUnlocked && !isKeystoreUnlocked(state)) { 27869489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return state; 27879489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 27889489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker 27899489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker return ::NO_ERROR; 27909489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker 27919489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker } 27929489b7905acfb27a99dd505364a715f4cf2ab5e6Chad Brubaker 27939d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root inline bool isKeystoreUnlocked(State state) { 27949d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root switch (state) { 27959d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root case ::STATE_NO_ERROR: 27969d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root return true; 27979d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root case ::STATE_UNINITIALIZED: 27989d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root case ::STATE_LOCKED: 27999d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root return false; 28009d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root } 28019d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root return false; 2802a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 280307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 280467d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker bool isKeyTypeSupported(const keymaster1_device_t* device, keymaster_keypair_t keyType) { 28051d448c074a86ef5d05a22fdf1358718976628a86Kenny Root const int32_t device_api = device->common.module->module_api_version; 28061d448c074a86ef5d05a22fdf1358718976628a86Kenny Root if (device_api == KEYMASTER_MODULE_API_VERSION_0_2) { 28071d448c074a86ef5d05a22fdf1358718976628a86Kenny Root switch (keyType) { 28081d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_RSA: 28091d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_DSA: 28101d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_EC: 28111d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return true; 28121d448c074a86ef5d05a22fdf1358718976628a86Kenny Root default: 28131d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return false; 28141d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } 28151d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } else if (device_api >= KEYMASTER_MODULE_API_VERSION_0_3) { 28161d448c074a86ef5d05a22fdf1358718976628a86Kenny Root switch (keyType) { 28171d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_RSA: 28181d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return true; 28191d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_DSA: 28201d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return device->flags & KEYMASTER_SUPPORTS_DSA; 28211d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_EC: 28221d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return device->flags & KEYMASTER_SUPPORTS_EC; 28231d448c074a86ef5d05a22fdf1358718976628a86Kenny Root default: 28241d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return false; 28251d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } 28261d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } else { 28271d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return keyType == TYPE_RSA; 28281d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } 28291d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } 28301d448c074a86ef5d05a22fdf1358718976628a86Kenny Root 28310cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker /** 28320cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * Check that all keymaster_key_param_t's provided by the application are 28330cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * allowed. Any parameter that keystore adds itself should be disallowed here. 28340cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker */ 28350cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker bool checkAllowedOperationParams(const std::vector<keymaster_key_param_t>& params) { 28360cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker for (auto param: params) { 28370cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker switch (param.tag) { 28380cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker case KM_TAG_AUTH_TOKEN: 28390cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return false; 28400cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker default: 28410cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker break; 28420cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 28430cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 28440cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return true; 28450cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 28460cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker 28470cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker keymaster_error_t getOperationCharacteristics(const keymaster_key_blob_t& key, 28480cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const keymaster1_device_t* dev, 28490cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const std::vector<keymaster_key_param_t>& params, 28500cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker keymaster_key_characteristics_t* out) { 28510cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker UniquePtr<keymaster_blob_t> appId; 28520cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker UniquePtr<keymaster_blob_t> appData; 28530cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker for (auto param : params) { 28540cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (param.tag == KM_TAG_APPLICATION_ID) { 28550cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker appId.reset(new keymaster_blob_t); 28560cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker appId->data = param.blob.data; 28570cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker appId->data_length = param.blob.data_length; 28580cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } else if (param.tag == KM_TAG_APPLICATION_DATA) { 28590cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker appData.reset(new keymaster_blob_t); 28600cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker appData->data = param.blob.data; 28610cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker appData->data_length = param.blob.data_length; 28620cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 28630cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 28640cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker keymaster_key_characteristics_t* result = NULL; 28650cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (!dev->get_key_characteristics) { 28660cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return KM_ERROR_UNIMPLEMENTED; 28670cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 28680cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker keymaster_error_t error = dev->get_key_characteristics(dev, &key, appId.get(), 28690cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker appData.get(), &result); 28700cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (result) { 28710cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker *out = *result; 28720cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker free(result); 28730cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 28740cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return error; 28750cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 28760cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker 28770cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker /** 28780cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * Get the auth token for this operation from the auth token table. 28790cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * 28800cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * Returns ::NO_ERROR if the auth token was set or none was required. 28810cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * ::OP_AUTH_NEEDED if it is a per op authorization, no 28820cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * authorization token exists for that operation and 28830cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * failOnTokenMissing is false. 28840cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * KM_ERROR_KEY_USER_NOT_AUTHENTICATED if there is no valid auth 28850cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * token for the operation 28860cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker */ 28870cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker int32_t getAuthToken(const keymaster_key_characteristics_t* characteristics, 28880cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker keymaster_operation_handle_t handle, 2889b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden keymaster_purpose_t purpose, 28900cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const hw_auth_token_t** authToken, 28910cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker bool failOnTokenMissing = true) { 28920cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker 28930cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker std::vector<keymaster_key_param_t> allCharacteristics; 28940cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker for (size_t i = 0; i < characteristics->sw_enforced.length; i++) { 28950cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker allCharacteristics.push_back(characteristics->sw_enforced.params[i]); 28960cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 28970cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker for (size_t i = 0; i < characteristics->hw_enforced.length; i++) { 28980cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker allCharacteristics.push_back(characteristics->hw_enforced.params[i]); 28990cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 2900b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden keymaster::AuthTokenTable::Error err = mAuthTokenTable.FindAuthorization( 2901b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden allCharacteristics.data(), allCharacteristics.size(), purpose, handle, authToken); 29020cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker switch (err) { 29030cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker case keymaster::AuthTokenTable::OK: 29040cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker case keymaster::AuthTokenTable::AUTH_NOT_REQUIRED: 29050cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return ::NO_ERROR; 29060cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker case keymaster::AuthTokenTable::AUTH_TOKEN_NOT_FOUND: 29070cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker case keymaster::AuthTokenTable::AUTH_TOKEN_EXPIRED: 29080cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker case keymaster::AuthTokenTable::AUTH_TOKEN_WRONG_SID: 29090cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return KM_ERROR_KEY_USER_NOT_AUTHENTICATED; 29100cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker case keymaster::AuthTokenTable::OP_HANDLE_REQUIRED: 29110cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return failOnTokenMissing ? (int32_t) KM_ERROR_KEY_USER_NOT_AUTHENTICATED : 29120cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker (int32_t) ::OP_AUTH_NEEDED; 29130cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker default: 29140cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker ALOGE("Unexpected FindAuthorization return value %d", err); 29150cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return KM_ERROR_INVALID_ARGUMENT; 29160cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 29170cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 29180cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker 29190cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker inline void addAuthToParams(std::vector<keymaster_key_param_t>* params, 29200cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const hw_auth_token_t* token) { 29210cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (token) { 29220cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker params->push_back(keymaster_param_blob(KM_TAG_AUTH_TOKEN, 29230cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker reinterpret_cast<const uint8_t*>(token), 29240cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker sizeof(hw_auth_token_t))); 29250cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 29260cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 29270cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker 29280cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker /** 29290cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * Add the auth token for the operation to the param list if the operation 29300cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * requires authorization. Uses the cached result in the OperationMap if available 29310cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * otherwise gets the token from the AuthTokenTable and caches the result. 29320cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * 29330cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * Returns ::NO_ERROR if the auth token was added or not needed. 29340cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * KM_ERROR_KEY_USER_NOT_AUTHENTICATED if the operation is not 29350cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * authenticated. 29360cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * KM_ERROR_INVALID_OPERATION_HANDLE if token is not a valid 29370cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker * operation token. 29380cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker */ 29390cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker int32_t addOperationAuthTokenIfNeeded(sp<IBinder> token, 29400cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker std::vector<keymaster_key_param_t>* params) { 29410cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const hw_auth_token_t* authToken = NULL; 29427169a8470f6539036addf3c960b075af224e83e2Chad Brubaker mOperationMap.getOperationAuthToken(token, &authToken); 29437169a8470f6539036addf3c960b075af224e83e2Chad Brubaker if (!authToken) { 29440cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const keymaster1_device_t* dev; 29450cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker keymaster_operation_handle_t handle; 29460cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker const keymaster_key_characteristics_t* characteristics = NULL; 2947b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden keymaster_purpose_t purpose; 29489221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden keymaster::km_id_t keyid; 29499221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden if (!mOperationMap.getOperation(token, &handle, &keyid, &purpose, &dev, 29509221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden &characteristics)) { 29510cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return KM_ERROR_INVALID_OPERATION_HANDLE; 29520cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 2953b2ffa420da26414379b31807eec76ec8c9f3b0a9Shawn Willden int32_t result = getAuthToken(characteristics, handle, purpose, &authToken); 29540cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (result != ::NO_ERROR) { 29550cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return result; 29560cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 29570cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker if (authToken) { 29580cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker mOperationMap.setOperationAuthToken(token, authToken); 29590cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 29600cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 29610cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker addAuthToParams(params, authToken); 29620cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker return ::NO_ERROR; 29630cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker } 29640cf34a249c008743cf2e2371743a89f86aa4b03cChad Brubaker 29653a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker /** 29663a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker * Translate a result value to a legacy return value. All keystore errors are 29673a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker * preserved and keymaster errors become SYSTEM_ERRORs 29683a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker */ 29693a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker inline int32_t translateResultToLegacyResult(int32_t result) { 29703a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (result > 0) { 29713a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return result; 29723a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 29733a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::SYSTEM_ERROR; 29743a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 29753a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 29763a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker void addLegacyKeyAuthorizations(std::vector<keymaster_key_param_t>& params) { 29773a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_enum(KM_TAG_PURPOSE, KM_PURPOSE_SIGN)); 29783a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_enum(KM_TAG_PURPOSE, KM_PURPOSE_VERIFY)); 29793a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_enum(KM_TAG_PURPOSE, KM_PURPOSE_ENCRYPT)); 29803a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_enum(KM_TAG_PURPOSE, KM_PURPOSE_DECRYPT)); 29813a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_enum(KM_TAG_PADDING, KM_PAD_NONE)); 29823a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_enum(KM_TAG_DIGEST, KM_DIGEST_NONE)); 29833a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_bool(KM_TAG_ALL_USERS)); 29843a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_bool(KM_TAG_NO_AUTH_REQUIRED)); 29853a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_date(KM_TAG_ORIGINATION_EXPIRE_DATETIME, LLONG_MAX)); 29863a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_date(KM_TAG_USAGE_EXPIRE_DATETIME, LLONG_MAX)); 29873a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_date(KM_TAG_ACTIVE_DATETIME, 0)); 29883a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker uint64_t now = keymaster::java_time(time(NULL)); 29893a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_date(KM_TAG_CREATION_DATETIME, now)); 29903a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 29913a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 29923a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker keymaster_key_param_t* getKeyAlgorithm(keymaster_key_characteristics_t* characteristics) { 29933a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker for (size_t i = 0; i < characteristics->hw_enforced.length; i++) { 29943a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (characteristics->hw_enforced.params[i].tag == KM_TAG_ALGORITHM) { 29953a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return &characteristics->hw_enforced.params[i]; 29963a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 29973a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 29983a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker for (size_t i = 0; i < characteristics->sw_enforced.length; i++) { 29993a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (characteristics->sw_enforced.params[i].tag == KM_TAG_ALGORITHM) { 30003a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return &characteristics->sw_enforced.params[i]; 30013a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30023a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30033a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return NULL; 30043a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30053a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 30063a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker void addLegacyBeginParams(const String16& name, std::vector<keymaster_key_param_t>& params) { 30073a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker // All legacy keys are DIGEST_NONE/PAD_NONE. 30083a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_enum(KM_TAG_DIGEST, KM_DIGEST_NONE)); 30093a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(keymaster_param_enum(KM_TAG_PADDING, KM_PAD_NONE)); 30103a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 30113a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker // Look up the algorithm of the key. 30123a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker KeyCharacteristics characteristics; 30133a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker int32_t rc = getKeyCharacteristics(name, NULL, NULL, &characteristics); 30143a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (rc != ::NO_ERROR) { 30153a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGE("Failed to get key characteristics"); 30163a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return; 30173a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30183a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker keymaster_key_param_t* algorithm = getKeyAlgorithm(&characteristics.characteristics); 30193a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (!algorithm) { 30203a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGE("getKeyCharacteristics did not include KM_TAG_ALGORITHM"); 30213a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return; 30223a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30233a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker params.push_back(*algorithm); 30243a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30253a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 30263a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker int32_t doLegacySignVerify(const String16& name, const uint8_t* data, size_t length, 30273a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker uint8_t** out, size_t* outLength, const uint8_t* signature, 30283a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker size_t signatureLength, keymaster_purpose_t purpose) { 30293a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 30303a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker std::basic_stringstream<uint8_t> outBuffer; 30313a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker OperationResult result; 30323a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker KeymasterArguments inArgs; 30333a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker addLegacyBeginParams(name, inArgs.params); 30343a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker sp<IBinder> appToken(new BBinder); 30353a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker sp<IBinder> token; 30363a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 30373a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker begin(appToken, name, purpose, true, inArgs, NULL, 0, &result); 30383a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (result.resultCode != ResponseCode::NO_ERROR) { 3039df70517b8d85b30e6ac7001ec68348f07d5129cbChad Brubaker if (result.resultCode == ::KEY_NOT_FOUND) { 3040df70517b8d85b30e6ac7001ec68348f07d5129cbChad Brubaker ALOGW("Key not found"); 3041df70517b8d85b30e6ac7001ec68348f07d5129cbChad Brubaker } else { 3042df70517b8d85b30e6ac7001ec68348f07d5129cbChad Brubaker ALOGW("Error in begin: %d", result.resultCode); 3043df70517b8d85b30e6ac7001ec68348f07d5129cbChad Brubaker } 30443a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return translateResultToLegacyResult(result.resultCode); 30453a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30463a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker inArgs.params.clear(); 30473a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker token = result.token; 30483a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker size_t consumed = 0; 30493a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker size_t lastConsumed = 0; 30503a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker do { 30513a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker update(token, inArgs, data + consumed, length - consumed, &result); 30523a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (result.resultCode != ResponseCode::NO_ERROR) { 30533a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("Error in update: %d", result.resultCode); 30543a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return translateResultToLegacyResult(result.resultCode); 30553a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30563a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (out) { 30573a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker outBuffer.write(result.data.get(), result.dataLength); 30583a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30593a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker lastConsumed = result.inputConsumed; 30603a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker consumed += lastConsumed; 30613a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } while (consumed < length && lastConsumed > 0); 30623a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 30633a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (consumed != length) { 30643a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("Not all data consumed. Consumed %zu of %zu", consumed, length); 30653a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::SYSTEM_ERROR; 30663a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30673a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 30683a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker finish(token, inArgs, signature, signatureLength, NULL, 0, &result); 30693a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (result.resultCode != ResponseCode::NO_ERROR) { 30703a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker ALOGW("Error in finish: %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 30773a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker if (out) { 30783a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker auto buf = outBuffer.str(); 30793a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker *out = new uint8_t[buf.size()]; 30803a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker memcpy(*out, buf.c_str(), buf.size()); 30813a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker *outLength = buf.size(); 30823a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30833a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 30843a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker return ::NO_ERROR; 30853a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker } 30863a7d9e626fa6c0e116c07be912c319aad6e08614Chad Brubaker 308707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ::KeyStore* mKeyStore; 308840a1a9b306d4e3c85b24f80ff39841507cf42357Chad Brubaker OperationMap mOperationMap; 3089d80c7b487b2f7f0bf955d0efeaa3db6dcd160639Chad Brubaker keymaster::AuthTokenTable mAuthTokenTable; 30909221bff2f13451ef330135bb32ea96de2a8b09ccShawn Willden KeystoreKeymasterEnforcement enforcement_policy; 309107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root}; 309207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 309307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root}; // namespace android 3094a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 3095a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootint main(int argc, char* argv[]) { 3096a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (argc < 2) { 3097a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ALOGE("A directory must be specified!"); 3098a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return 1; 3099a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 3100a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (chdir(argv[1]) == -1) { 3101a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ALOGE("chdir: %s: %s", argv[1], strerror(errno)); 3102a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return 1; 3103a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 3104a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 3105a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root Entropy entropy; 3106a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (!entropy.open()) { 3107a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return 1; 3108a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 310970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 3110bd07a239085228c25898bc6cdece8b1b8758df83Chad Brubaker keymaster1_device_t* dev; 311170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root if (keymaster_device_initialize(&dev)) { 311270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root ALOGE("keystore keymaster could not be initialized; exiting"); 311370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return 1; 311470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 311570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 311667d2a5029e8c25c5ee448e3bbd245cdcebe6abd3Chad Brubaker keymaster1_device_t* fallback; 3117fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker if (fallback_keymaster_device_initialize(&fallback)) { 3118fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker ALOGE("software keymaster could not be initialized; exiting"); 3119fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker return 1; 3120fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker } 3121fc18edcdfe2f7774e621030d51338f3216170b97Chad Brubaker 3122eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn ks_is_selinux_enabled = is_selinux_enabled(); 3123eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (ks_is_selinux_enabled) { 3124eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn union selinux_callback cb; 3125eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn cb.func_log = selinux_log_callback; 3126eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn selinux_set_callback(SELINUX_CB_LOG, cb); 3127eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (getcon(&tctx) != 0) { 3128eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn ALOGE("SELinux: Could not acquire target context. Aborting keystore.\n"); 3129eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn return -1; 3130eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } 3131eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } else { 3132eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn ALOGI("SELinux: Keystore SELinux is disabled.\n"); 3133eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } 3134eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 3135bd07a239085228c25898bc6cdece8b1b8758df83Chad Brubaker KeyStore keyStore(&entropy, dev, fallback); 3136655b958eb2180c7c06889f83f606d23421bf038cKenny Root keyStore.initialize(); 313707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root android::sp<android::IServiceManager> sm = android::defaultServiceManager(); 313807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root android::sp<android::KeyStoreProxy> proxy = new android::KeyStoreProxy(&keyStore); 313907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root android::status_t ret = sm->addService(android::String16("android.security.keystore"), proxy); 314007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (ret != android::OK) { 314107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ALOGE("Couldn't register binder service!"); 314207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return -1; 3143a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 314470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 314507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root /* 314607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * We're the only thread in existence, so we're just going to process 314707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * Binder transaction as a single-threaded program. 314807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root */ 314907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root android::IPCThreadState::self()->joinThreadPool(); 315070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 315107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root keymaster_device_release(dev); 3152a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return 1; 3153a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root} 3154