keystore.cpp revision 4b84fdc21457e16b08dc2738f4744c9ca7f7cc46
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> 23a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <unistd.h> 24a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <signal.h> 25a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <errno.h> 26a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <dirent.h> 27655b958eb2180c7c06889f83f606d23421bf038cKenny Root#include <errno.h> 28a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <fcntl.h> 29a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <limits.h> 30822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root#include <assert.h> 31a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <sys/types.h> 32a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <sys/socket.h> 33a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <sys/stat.h> 34a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <sys/time.h> 35a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <arpa/inet.h> 36a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 37a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <openssl/aes.h> 38822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root#include <openssl/bio.h> 39a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <openssl/evp.h> 40a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <openssl/md5.h> 41822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root#include <openssl/pem.h> 42a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 4370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root#include <hardware/keymaster.h> 4470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 4517208e0de5a42722901d803118745cca25fd10c1Kenny Root#include <keymaster/softkeymaster.h> 4617208e0de5a42722901d803118745cca25fd10c1Kenny Root 4726cfc08add3966eca5892e3387cf5ed6dc3068fbKenny Root#include <UniquePtr.h> 48655b958eb2180c7c06889f83f606d23421bf038cKenny Root#include <utils/String8.h> 49655b958eb2180c7c06889f83f606d23421bf038cKenny Root#include <utils/Vector.h> 5070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 5107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root#include <keystore/IKeystoreService.h> 5207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root#include <binder/IPCThreadState.h> 5307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root#include <binder/IServiceManager.h> 5407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 55a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <cutils/log.h> 56a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <cutils/sockets.h> 57a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#include <private/android_filesystem_config.h> 58a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 5907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root#include <keystore/keystore.h> 60a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 61eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn#include <selinux/android.h> 62eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 6396427baf0094d50047049d329b0779c3c910402cKenny Root#include "defaults.h" 6496427baf0094d50047049d329b0779c3c910402cKenny Root 65a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root/* KeyStore is a secured storage for key-value pairs. In this implementation, 66a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * each file stores one key-value pair. Keys are encoded in file names, and 67a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * values are encrypted with checksums. The encryption key is protected by a 68a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * user-defined password. To keep things simple, buffers are always larger than 69a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * the maximum space we needed, so boundary checks on buffers are omitted. */ 70a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 71a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#define KEY_SIZE ((NAME_MAX - 15) / 2) 72a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#define VALUE_SIZE 32768 73a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root#define PASSWORD_SIZE VALUE_SIZE 74a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 75822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 7696427baf0094d50047049d329b0779c3c910402cKenny Rootstruct BIGNUM_Delete { 7796427baf0094d50047049d329b0779c3c910402cKenny Root void operator()(BIGNUM* p) const { 7896427baf0094d50047049d329b0779c3c910402cKenny Root BN_free(p); 7996427baf0094d50047049d329b0779c3c910402cKenny Root } 8096427baf0094d50047049d329b0779c3c910402cKenny Root}; 8196427baf0094d50047049d329b0779c3c910402cKenny Roottypedef UniquePtr<BIGNUM, BIGNUM_Delete> Unique_BIGNUM; 8296427baf0094d50047049d329b0779c3c910402cKenny Root 83822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Rootstruct BIO_Delete { 84822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root void operator()(BIO* p) const { 85822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root BIO_free(p); 86822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 87822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root}; 88822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Roottypedef UniquePtr<BIO, BIO_Delete> Unique_BIO; 89822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 90822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Rootstruct EVP_PKEY_Delete { 91822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root void operator()(EVP_PKEY* p) const { 92822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root EVP_PKEY_free(p); 93822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 94822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root}; 95822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Roottypedef UniquePtr<EVP_PKEY, EVP_PKEY_Delete> Unique_EVP_PKEY; 96822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 97822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Rootstruct PKCS8_PRIV_KEY_INFO_Delete { 98822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root void operator()(PKCS8_PRIV_KEY_INFO* p) const { 99822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root PKCS8_PRIV_KEY_INFO_free(p); 100822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 101822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root}; 102822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Roottypedef UniquePtr<PKCS8_PRIV_KEY_INFO, PKCS8_PRIV_KEY_INFO_Delete> Unique_PKCS8_PRIV_KEY_INFO; 103822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 104822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 10570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Rootstatic int keymaster_device_initialize(keymaster_device_t** dev) { 10670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root int rc; 10770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 10870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root const hw_module_t* mod; 10970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root rc = hw_get_module_by_class(KEYSTORE_HARDWARE_MODULE_ID, NULL, &mod); 11070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root if (rc) { 11170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root ALOGE("could not find any keystore module"); 11270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root goto out; 11370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 11470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 11570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root rc = keymaster_open(mod, dev); 11670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root if (rc) { 11770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root ALOGE("could not open keymaster device in %s (%s)", 11870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root KEYSTORE_HARDWARE_MODULE_ID, strerror(-rc)); 11970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root goto out; 12070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 12170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 12270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return 0; 12370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 12470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Rootout: 12570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root *dev = NULL; 12670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return rc; 12770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root} 12870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 12970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Rootstatic void keymaster_device_release(keymaster_device_t* dev) { 13070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root keymaster_close(dev); 13170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root} 13270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 13307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root/*************** 13407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * PERMISSIONS * 13507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ***************/ 13607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 13707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root/* Here are the permissions, actions, users, and the main function. */ 13807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Roottypedef enum { 1394e865753346fc6a075966972a7a98051818859dbRobin Lee P_TEST = 1 << 0, 1404e865753346fc6a075966972a7a98051818859dbRobin Lee P_GET = 1 << 1, 1414e865753346fc6a075966972a7a98051818859dbRobin Lee P_INSERT = 1 << 2, 1424e865753346fc6a075966972a7a98051818859dbRobin Lee P_DELETE = 1 << 3, 1434e865753346fc6a075966972a7a98051818859dbRobin Lee P_EXIST = 1 << 4, 1444e865753346fc6a075966972a7a98051818859dbRobin Lee P_SAW = 1 << 5, 1454e865753346fc6a075966972a7a98051818859dbRobin Lee P_RESET = 1 << 6, 1464e865753346fc6a075966972a7a98051818859dbRobin Lee P_PASSWORD = 1 << 7, 1474e865753346fc6a075966972a7a98051818859dbRobin Lee P_LOCK = 1 << 8, 1484e865753346fc6a075966972a7a98051818859dbRobin Lee P_UNLOCK = 1 << 9, 1494e865753346fc6a075966972a7a98051818859dbRobin Lee P_ZERO = 1 << 10, 1504e865753346fc6a075966972a7a98051818859dbRobin Lee P_SIGN = 1 << 11, 1514e865753346fc6a075966972a7a98051818859dbRobin Lee P_VERIFY = 1 << 12, 1524e865753346fc6a075966972a7a98051818859dbRobin Lee P_GRANT = 1 << 13, 1534e865753346fc6a075966972a7a98051818859dbRobin Lee P_DUPLICATE = 1 << 14, 1544e865753346fc6a075966972a7a98051818859dbRobin Lee P_CLEAR_UID = 1 << 15, 1554e865753346fc6a075966972a7a98051818859dbRobin Lee P_RESET_UID = 1 << 16, 1564e865753346fc6a075966972a7a98051818859dbRobin Lee P_SYNC_UID = 1 << 17, 1574e865753346fc6a075966972a7a98051818859dbRobin Lee P_PASSWORD_UID = 1 << 18, 15807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root} perm_t; 15907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 16007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootstatic struct user_euid { 16107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root uid_t uid; 16207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root uid_t euid; 16307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root} user_euids[] = { 16407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root {AID_VPN, AID_SYSTEM}, 16507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root {AID_WIFI, AID_SYSTEM}, 16607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root {AID_ROOT, AID_SYSTEM}, 16707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root}; 16807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 169eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn/* perm_labels associcated with keystore_key SELinux class verbs. */ 170eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahnconst char *perm_labels[] = { 171eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "test", 172eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "get", 173eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "insert", 174eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "delete", 175eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "exist", 176eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "saw", 177eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "reset", 178eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "password", 179eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "lock", 180eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "unlock", 181eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "zero", 182eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "sign", 183eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "verify", 184eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "grant", 185eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn "duplicate", 1864e865753346fc6a075966972a7a98051818859dbRobin Lee "clear_uid", 1874e865753346fc6a075966972a7a98051818859dbRobin Lee "reset_uid", 1884e865753346fc6a075966972a7a98051818859dbRobin Lee "sync_uid", 1894e865753346fc6a075966972a7a98051818859dbRobin Lee "password_uid", 190eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn}; 191eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 19207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootstatic struct user_perm { 19307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root uid_t uid; 19407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root perm_t perms; 19507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root} user_perms[] = { 19607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root {AID_SYSTEM, static_cast<perm_t>((uint32_t)(~0)) }, 19707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root {AID_VPN, static_cast<perm_t>(P_GET | P_SIGN | P_VERIFY) }, 19807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root {AID_WIFI, static_cast<perm_t>(P_GET | P_SIGN | P_VERIFY) }, 19907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root {AID_ROOT, static_cast<perm_t>(P_GET) }, 20007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root}; 20107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 20207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootstatic const perm_t DEFAULT_PERMS = static_cast<perm_t>(P_TEST | P_GET | P_INSERT | P_DELETE | P_EXIST | P_SAW | P_SIGN 20307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root | P_VERIFY); 20407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 205eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahnstatic char *tctx; 206eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahnstatic int ks_is_selinux_enabled; 207eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 208eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahnstatic const char *get_perm_label(perm_t perm) { 209eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn unsigned int index = ffs(perm); 210eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (index > 0 && index <= (sizeof(perm_labels) / sizeof(perm_labels[0]))) { 211eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn return perm_labels[index - 1]; 212eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } else { 213eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn ALOGE("Keystore: Failed to retrieve permission label.\n"); 214eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn abort(); 215eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } 216eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn} 217eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 218655b958eb2180c7c06889f83f606d23421bf038cKenny Root/** 219655b958eb2180c7c06889f83f606d23421bf038cKenny Root * Returns the app ID (in the Android multi-user sense) for the current 220655b958eb2180c7c06889f83f606d23421bf038cKenny Root * UNIX UID. 221655b958eb2180c7c06889f83f606d23421bf038cKenny Root */ 222655b958eb2180c7c06889f83f606d23421bf038cKenny Rootstatic uid_t get_app_id(uid_t uid) { 223655b958eb2180c7c06889f83f606d23421bf038cKenny Root return uid % AID_USER; 224655b958eb2180c7c06889f83f606d23421bf038cKenny Root} 225655b958eb2180c7c06889f83f606d23421bf038cKenny Root 226655b958eb2180c7c06889f83f606d23421bf038cKenny Root/** 227655b958eb2180c7c06889f83f606d23421bf038cKenny Root * Returns the user ID (in the Android multi-user sense) for the current 228655b958eb2180c7c06889f83f606d23421bf038cKenny Root * UNIX UID. 229655b958eb2180c7c06889f83f606d23421bf038cKenny Root */ 230655b958eb2180c7c06889f83f606d23421bf038cKenny Rootstatic uid_t get_user_id(uid_t uid) { 231655b958eb2180c7c06889f83f606d23421bf038cKenny Root return uid / AID_USER; 232655b958eb2180c7c06889f83f606d23421bf038cKenny Root} 233655b958eb2180c7c06889f83f606d23421bf038cKenny Root 234eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahnstatic bool keystore_selinux_check_access(uid_t uid, perm_t perm, pid_t spid) { 235eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!ks_is_selinux_enabled) { 236eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn return true; 237eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } 238eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 239eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn char *sctx = NULL; 240eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn const char *selinux_class = "keystore_key"; 241eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn const char *str_perm = get_perm_label(perm); 242eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 243eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!str_perm) { 244eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn return false; 245eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } 246eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 247eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (getpidcon(spid, &sctx) != 0) { 248eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn ALOGE("SELinux: Failed to get source pid context.\n"); 249eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn return false; 250eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } 25166dbf67dd65b4808a15ef64f0ffde1275bdd58a9Nick Kralevich 252eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn bool allowed = selinux_check_access(sctx, tctx, selinux_class, str_perm, 253eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn NULL) == 0; 254eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn freecon(sctx); 255eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn return allowed; 256eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn} 257eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 258eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahnstatic bool has_permission(uid_t uid, perm_t perm, pid_t spid) { 259655b958eb2180c7c06889f83f606d23421bf038cKenny Root // All system users are equivalent for multi-user support. 260655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (get_app_id(uid) == AID_SYSTEM) { 261655b958eb2180c7c06889f83f606d23421bf038cKenny Root uid = AID_SYSTEM; 262655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 263655b958eb2180c7c06889f83f606d23421bf038cKenny Root 26407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root for (size_t i = 0; i < sizeof(user_perms)/sizeof(user_perms[0]); i++) { 26507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root struct user_perm user = user_perms[i]; 26607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (user.uid == uid) { 267eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn return (user.perms & perm) && 268eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn keystore_selinux_check_access(uid, perm, spid); 26907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 27007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 27107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 272eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn return (DEFAULT_PERMS & perm) && 273eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn keystore_selinux_check_access(uid, perm, spid); 27407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root} 27507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 276494689083467ec372a58f094f041c8f102f39393Kenny Root/** 277494689083467ec372a58f094f041c8f102f39393Kenny Root * Returns the UID that the callingUid should act as. This is here for 278494689083467ec372a58f094f041c8f102f39393Kenny Root * legacy support of the WiFi and VPN systems and should be removed 279494689083467ec372a58f094f041c8f102f39393Kenny Root * when WiFi can operate in its own namespace. 280494689083467ec372a58f094f041c8f102f39393Kenny Root */ 28107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootstatic uid_t get_keystore_euid(uid_t uid) { 28207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root for (size_t i = 0; i < sizeof(user_euids)/sizeof(user_euids[0]); i++) { 28307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root struct user_euid user = user_euids[i]; 28407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (user.uid == uid) { 28507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return user.euid; 28607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 28707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 28807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 28907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return uid; 29007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root} 29107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 292494689083467ec372a58f094f041c8f102f39393Kenny Root/** 293494689083467ec372a58f094f041c8f102f39393Kenny Root * Returns true if the callingUid is allowed to interact in the targetUid's 294494689083467ec372a58f094f041c8f102f39393Kenny Root * namespace. 295494689083467ec372a58f094f041c8f102f39393Kenny Root */ 296494689083467ec372a58f094f041c8f102f39393Kenny Rootstatic bool is_granted_to(uid_t callingUid, uid_t targetUid) { 297494689083467ec372a58f094f041c8f102f39393Kenny Root for (size_t i = 0; i < sizeof(user_euids)/sizeof(user_euids[0]); i++) { 298494689083467ec372a58f094f041c8f102f39393Kenny Root struct user_euid user = user_euids[i]; 299494689083467ec372a58f094f041c8f102f39393Kenny Root if (user.euid == callingUid && user.uid == targetUid) { 300494689083467ec372a58f094f041c8f102f39393Kenny Root return true; 301494689083467ec372a58f094f041c8f102f39393Kenny Root } 302494689083467ec372a58f094f041c8f102f39393Kenny Root } 303494689083467ec372a58f094f041c8f102f39393Kenny Root 304494689083467ec372a58f094f041c8f102f39393Kenny Root return false; 305494689083467ec372a58f094f041c8f102f39393Kenny Root} 306494689083467ec372a58f094f041c8f102f39393Kenny Root 307007cb236ada4b3d70815f03dd07116a5e187f4ddKenny Root/** 308007cb236ada4b3d70815f03dd07116a5e187f4ddKenny Root * Allow the system to perform some privileged tasks that have to do with 309007cb236ada4b3d70815f03dd07116a5e187f4ddKenny Root * system maintenance. This should not be used for any function that uses 310007cb236ada4b3d70815f03dd07116a5e187f4ddKenny Root * the keys in any way (e.g., signing). 311007cb236ada4b3d70815f03dd07116a5e187f4ddKenny Root */ 312007cb236ada4b3d70815f03dd07116a5e187f4ddKenny Rootstatic bool is_self_or_system(uid_t callingUid, uid_t targetUid) { 313007cb236ada4b3d70815f03dd07116a5e187f4ddKenny Root return callingUid == targetUid || callingUid == AID_SYSTEM; 314007cb236ada4b3d70815f03dd07116a5e187f4ddKenny Root} 315007cb236ada4b3d70815f03dd07116a5e187f4ddKenny Root 316a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root/* Here is the encoding of keys. This is necessary in order to allow arbitrary 317a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * characters in keys. Characters in [0-~] are not encoded. Others are encoded 318a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * into two bytes. The first byte is one of [+-.] which represents the first 319a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * two bits of the character. The second byte encodes the rest of the bits into 320a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * [0-o]. Therefore in the worst case the length of a key gets doubled. Note 321a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * that Base64 cannot be used here due to the need of prefix match on keys. */ 322a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 323655b958eb2180c7c06889f83f606d23421bf038cKenny Rootstatic size_t encode_key_length(const android::String8& keyName) { 324655b958eb2180c7c06889f83f606d23421bf038cKenny Root const uint8_t* in = reinterpret_cast<const uint8_t*>(keyName.string()); 325655b958eb2180c7c06889f83f606d23421bf038cKenny Root size_t length = keyName.length(); 326655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (int i = length; i > 0; --i, ++in) { 327655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (*in < '0' || *in > '~') { 328655b958eb2180c7c06889f83f606d23421bf038cKenny Root ++length; 329655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 330655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 331655b958eb2180c7c06889f83f606d23421bf038cKenny Root return length; 332655b958eb2180c7c06889f83f606d23421bf038cKenny Root} 333655b958eb2180c7c06889f83f606d23421bf038cKenny Root 33407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootstatic int encode_key(char* out, const android::String8& keyName) { 33507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const uint8_t* in = reinterpret_cast<const uint8_t*>(keyName.string()); 33607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root size_t length = keyName.length(); 337a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root for (int i = length; i > 0; --i, ++in, ++out) { 338655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (*in < '0' || *in > '~') { 339a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root *out = '+' + (*in >> 6); 340a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root *++out = '0' + (*in & 0x3F); 341a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ++length; 342655b958eb2180c7c06889f83f606d23421bf038cKenny Root } else { 343655b958eb2180c7c06889f83f606d23421bf038cKenny Root *out = *in; 344a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 345a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 346a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root *out = '\0'; 34770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return length; 34870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root} 34970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 35007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root/* 35107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * Converts from the "escaped" format on disk to actual name. 35207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * This will be smaller than the input string. 35307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * 35407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * Characters that should combine with the next at the end will be truncated. 35507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root */ 35607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootstatic size_t decode_key_length(const char* in, size_t length) { 35707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root size_t outLength = 0; 35807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 35907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root for (const char* end = in + length; in < end; in++) { 36007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root /* This combines with the next character. */ 36107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (*in < '0' || *in > '~') { 36207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root continue; 36307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 36407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 36507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root outLength++; 36607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 36707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return outLength; 36807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root} 36907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 37007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootstatic void decode_key(char* out, const char* in, size_t length) { 37107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root for (const char* end = in + length; in < end; in++) { 37207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (*in < '0' || *in > '~') { 37307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root /* Truncate combining characters at the end. */ 37407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (in + 1 >= end) { 37507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root break; 37607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 37707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 37807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *out = (*in++ - '+') << 6; 37907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *out++ |= (*in - '0') & 0x3F; 380a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } else { 38107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *out++ = *in; 382a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 383a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 384a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root *out = '\0'; 385a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root} 386a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 387a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootstatic size_t readFully(int fd, uint8_t* data, size_t size) { 388a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t remaining = size; 389a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root while (remaining > 0) { 390150ca934edb745de3666a6492b039900df228ff0Kenny Root ssize_t n = TEMP_FAILURE_RETRY(read(fd, data, remaining)); 3915281edbc9445065479e92a6c86da462f3943c2caKenny Root if (n <= 0) { 392150ca934edb745de3666a6492b039900df228ff0Kenny Root return size - remaining; 393a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 394a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root data += n; 395a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root remaining -= n; 396a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 397a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return size; 398a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root} 399a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 400a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootstatic size_t writeFully(int fd, uint8_t* data, size_t size) { 401a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t remaining = size; 402a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root while (remaining > 0) { 403150ca934edb745de3666a6492b039900df228ff0Kenny Root ssize_t n = TEMP_FAILURE_RETRY(write(fd, data, remaining)); 404150ca934edb745de3666a6492b039900df228ff0Kenny Root if (n < 0) { 405150ca934edb745de3666a6492b039900df228ff0Kenny Root ALOGW("write failed: %s", strerror(errno)); 406150ca934edb745de3666a6492b039900df228ff0Kenny Root return size - remaining; 407a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 408a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root data += n; 409a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root remaining -= n; 410a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 411a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return size; 412a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root} 413a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 414a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootclass Entropy { 415a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootpublic: 416a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root Entropy() : mRandom(-1) {} 417a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ~Entropy() { 418150ca934edb745de3666a6492b039900df228ff0Kenny Root if (mRandom >= 0) { 419a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root close(mRandom); 420a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 421a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 422a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 423a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root bool open() { 424a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root const char* randomDevice = "/dev/urandom"; 425150ca934edb745de3666a6492b039900df228ff0Kenny Root mRandom = TEMP_FAILURE_RETRY(::open(randomDevice, O_RDONLY)); 426150ca934edb745de3666a6492b039900df228ff0Kenny Root if (mRandom < 0) { 427a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ALOGE("open: %s: %s", randomDevice, strerror(errno)); 428a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return false; 429a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 430a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return true; 431a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 432a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 4335187818895c4c5f650a611c40531b1dff7764c18Kenny Root bool generate_random_data(uint8_t* data, size_t size) const { 434a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return (readFully(mRandom, data, size) == size); 435a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 436a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 437a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootprivate: 438a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root int mRandom; 439a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root}; 440a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 441a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root/* Here is the file format. There are two parts in blob.value, the secret and 442a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * the description. The secret is stored in ciphertext, and its original size 443a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * can be found in blob.length. The description is stored after the secret in 444a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * plaintext, and its size is specified in blob.info. The total size of the two 445822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * parts must be no more than VALUE_SIZE bytes. The first field is the version, 446f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root * the second is the blob's type, and the third byte is flags. Fields other 447a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * than blob.info, blob.length, and blob.value are modified by encryptBlob() 448a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root * and decryptBlob(). Thus they should not be accessed from outside. */ 449a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 450822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root/* ** Note to future implementors of encryption: ** 451822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Currently this is the construction: 452822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * metadata || Enc(MD5(data) || data) 453822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * 454822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * This should be the construction used for encrypting if re-implementing: 455822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * 456822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Derive independent keys for encryption and MAC: 457822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Kenc = AES_encrypt(masterKey, "Encrypt") 458822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Kmac = AES_encrypt(masterKey, "MAC") 459822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * 460822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Store this: 461822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * metadata || AES_CTR_encrypt(Kenc, rand_IV, data) || 462822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * HMAC(Kmac, metadata || Enc(data)) 463822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root */ 464a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootstruct __attribute__((packed)) blob { 465822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root uint8_t version; 466822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root uint8_t type; 467f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root uint8_t flags; 468a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root uint8_t info; 469a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root uint8_t vector[AES_BLOCK_SIZE]; 470822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root uint8_t encrypted[0]; // Marks offset to encrypted data. 471a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root uint8_t digest[MD5_DIGEST_LENGTH]; 472822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root uint8_t digested[0]; // Marks offset to digested data. 473a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root int32_t length; // in network byte order when encrypted 474a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root uint8_t value[VALUE_SIZE + AES_BLOCK_SIZE]; 475a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root}; 476a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 477822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Roottypedef enum { 478d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root TYPE_ANY = 0, // meta type that matches anything 479822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root TYPE_GENERIC = 1, 480822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root TYPE_MASTER_KEY = 2, 481822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root TYPE_KEY_PAIR = 3, 482822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root} BlobType; 483822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 484f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Rootstatic const uint8_t CURRENT_BLOB_VERSION = 2; 485822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 486a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootclass Blob { 487a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootpublic: 48807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root Blob(const uint8_t* value, int32_t valueLength, const uint8_t* info, uint8_t infoLength, 48907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root BlobType type) { 490a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root mBlob.length = valueLength; 491a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root memcpy(mBlob.value, value, valueLength); 492a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 493a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root mBlob.info = infoLength; 494a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root memcpy(mBlob.value + valueLength, info, infoLength); 495822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 49607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root mBlob.version = CURRENT_BLOB_VERSION; 497822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root mBlob.type = uint8_t(type); 498f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 499ee8068b9e7bfb2770635062fc9c2035be2142bd8Kenny Root if (type == TYPE_MASTER_KEY) { 500ee8068b9e7bfb2770635062fc9c2035be2142bd8Kenny Root mBlob.flags = KEYSTORE_FLAG_ENCRYPTED; 501ee8068b9e7bfb2770635062fc9c2035be2142bd8Kenny Root } else { 502ee8068b9e7bfb2770635062fc9c2035be2142bd8Kenny Root mBlob.flags = KEYSTORE_FLAG_NONE; 503ee8068b9e7bfb2770635062fc9c2035be2142bd8Kenny Root } 504a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 505a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 506a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root Blob(blob b) { 507a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root mBlob = b; 508a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 509a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 510a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root Blob() {} 511a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 5125187818895c4c5f650a611c40531b1dff7764c18Kenny Root const uint8_t* getValue() const { 513a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return mBlob.value; 514a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 515a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 5165187818895c4c5f650a611c40531b1dff7764c18Kenny Root int32_t getLength() const { 517a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return mBlob.length; 518a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 519a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 5205187818895c4c5f650a611c40531b1dff7764c18Kenny Root const uint8_t* getInfo() const { 5215187818895c4c5f650a611c40531b1dff7764c18Kenny Root return mBlob.value + mBlob.length; 5225187818895c4c5f650a611c40531b1dff7764c18Kenny Root } 5235187818895c4c5f650a611c40531b1dff7764c18Kenny Root 5245187818895c4c5f650a611c40531b1dff7764c18Kenny Root uint8_t getInfoLength() const { 525a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return mBlob.info; 526a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 527a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 528822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root uint8_t getVersion() const { 529822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return mBlob.version; 530822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 531822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 532f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root bool isEncrypted() const { 533f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (mBlob.version < 2) { 534f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return true; 535f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 536f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 537f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return mBlob.flags & KEYSTORE_FLAG_ENCRYPTED; 538f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 539f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 540f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root void setEncrypted(bool encrypted) { 541f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (encrypted) { 542f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root mBlob.flags |= KEYSTORE_FLAG_ENCRYPTED; 543f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } else { 544f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root mBlob.flags &= ~KEYSTORE_FLAG_ENCRYPTED; 545f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 546f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 547f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 54817208e0de5a42722901d803118745cca25fd10c1Kenny Root bool isFallback() const { 54917208e0de5a42722901d803118745cca25fd10c1Kenny Root return mBlob.flags & KEYSTORE_FLAG_FALLBACK; 55017208e0de5a42722901d803118745cca25fd10c1Kenny Root } 55117208e0de5a42722901d803118745cca25fd10c1Kenny Root 55217208e0de5a42722901d803118745cca25fd10c1Kenny Root void setFallback(bool fallback) { 55317208e0de5a42722901d803118745cca25fd10c1Kenny Root if (fallback) { 55417208e0de5a42722901d803118745cca25fd10c1Kenny Root mBlob.flags |= KEYSTORE_FLAG_FALLBACK; 55517208e0de5a42722901d803118745cca25fd10c1Kenny Root } else { 55617208e0de5a42722901d803118745cca25fd10c1Kenny Root mBlob.flags &= ~KEYSTORE_FLAG_FALLBACK; 55717208e0de5a42722901d803118745cca25fd10c1Kenny Root } 55817208e0de5a42722901d803118745cca25fd10c1Kenny Root } 55917208e0de5a42722901d803118745cca25fd10c1Kenny Root 560822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root void setVersion(uint8_t version) { 561822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root mBlob.version = version; 562822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 563822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 564822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root BlobType getType() const { 565822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return BlobType(mBlob.type); 566822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 567822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 568822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root void setType(BlobType type) { 569822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root mBlob.type = uint8_t(type); 570822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 571822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 572f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ResponseCode writeBlob(const char* filename, AES_KEY *aes_key, State state, Entropy* entropy) { 573f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ALOGV("writing blob %s", filename); 574f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (isEncrypted()) { 575f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (state != STATE_NO_ERROR) { 576f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ALOGD("couldn't insert encrypted blob while not unlocked"); 577f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return LOCKED; 578f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 579f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 580f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (!entropy->generate_random_data(mBlob.vector, AES_BLOCK_SIZE)) { 581f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ALOGW("Could not read random data for: %s", filename); 582f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return SYSTEM_ERROR; 583f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 584a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 585a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 586a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // data includes the value and the value's length 587a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t dataLength = mBlob.length + sizeof(mBlob.length); 588a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // pad data to the AES_BLOCK_SIZE 589a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t digestedLength = ((dataLength + AES_BLOCK_SIZE - 1) 590a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root / AES_BLOCK_SIZE * AES_BLOCK_SIZE); 591a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // encrypted data includes the digest value 592a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t encryptedLength = digestedLength + MD5_DIGEST_LENGTH; 593a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // move info after space for padding 594a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root memmove(&mBlob.encrypted[encryptedLength], &mBlob.value[mBlob.length], mBlob.info); 595a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // zero padding area 596a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root memset(mBlob.value + mBlob.length, 0, digestedLength - dataLength); 597a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 598a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root mBlob.length = htonl(mBlob.length); 599a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 600f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (isEncrypted()) { 601f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root MD5(mBlob.digested, digestedLength, mBlob.digest); 602f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 603f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root uint8_t vector[AES_BLOCK_SIZE]; 604f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root memcpy(vector, mBlob.vector, AES_BLOCK_SIZE); 605f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root AES_cbc_encrypt(mBlob.encrypted, mBlob.encrypted, encryptedLength, 606f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root aes_key, vector, AES_ENCRYPT); 607f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 608a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 609a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t headerLength = (mBlob.encrypted - (uint8_t*) &mBlob); 610a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t fileLength = encryptedLength + headerLength + mBlob.info; 611a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 612a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root const char* tmpFileName = ".tmp"; 613150ca934edb745de3666a6492b039900df228ff0Kenny Root int out = TEMP_FAILURE_RETRY(open(tmpFileName, 614150ca934edb745de3666a6492b039900df228ff0Kenny Root O_WRONLY | O_TRUNC | O_CREAT, S_IRUSR | S_IWUSR)); 615150ca934edb745de3666a6492b039900df228ff0Kenny Root if (out < 0) { 616150ca934edb745de3666a6492b039900df228ff0Kenny Root ALOGW("could not open file: %s: %s", tmpFileName, strerror(errno)); 617a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 618a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 619a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t writtenBytes = writeFully(out, (uint8_t*) &mBlob, fileLength); 620a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (close(out) != 0) { 621a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 622a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 623a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (writtenBytes != fileLength) { 624150ca934edb745de3666a6492b039900df228ff0Kenny Root ALOGW("blob not fully written %zu != %zu", writtenBytes, fileLength); 625a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root unlink(tmpFileName); 626a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 627a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 628150ca934edb745de3666a6492b039900df228ff0Kenny Root if (rename(tmpFileName, filename) == -1) { 629150ca934edb745de3666a6492b039900df228ff0Kenny Root ALOGW("could not rename blob to %s: %s", filename, strerror(errno)); 630150ca934edb745de3666a6492b039900df228ff0Kenny Root return SYSTEM_ERROR; 631150ca934edb745de3666a6492b039900df228ff0Kenny Root } 632150ca934edb745de3666a6492b039900df228ff0Kenny Root return NO_ERROR; 633a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 634a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 635f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ResponseCode readBlob(const char* filename, AES_KEY *aes_key, State state) { 636f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ALOGV("reading blob %s", filename); 637150ca934edb745de3666a6492b039900df228ff0Kenny Root int in = TEMP_FAILURE_RETRY(open(filename, O_RDONLY)); 638150ca934edb745de3666a6492b039900df228ff0Kenny Root if (in < 0) { 639a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return (errno == ENOENT) ? KEY_NOT_FOUND : SYSTEM_ERROR; 640a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 641a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // fileLength may be less than sizeof(mBlob) since the in 642a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // memory version has extra padding to tolerate rounding up to 643a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // the AES_BLOCK_SIZE 644a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t fileLength = readFully(in, (uint8_t*) &mBlob, sizeof(mBlob)); 645a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (close(in) != 0) { 646a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 647a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 648f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 649f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (isEncrypted() && (state != STATE_NO_ERROR)) { 650f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return LOCKED; 651f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 652f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 653a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t headerLength = (mBlob.encrypted - (uint8_t*) &mBlob); 654a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (fileLength < headerLength) { 655a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return VALUE_CORRUPTED; 656a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 657a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 658a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ssize_t encryptedLength = fileLength - (headerLength + mBlob.info); 659f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (encryptedLength < 0) { 660a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return VALUE_CORRUPTED; 661a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 662f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 663f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ssize_t digestedLength; 664f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (isEncrypted()) { 665f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (encryptedLength % AES_BLOCK_SIZE != 0) { 666f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return VALUE_CORRUPTED; 667f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 668f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 669f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root AES_cbc_encrypt(mBlob.encrypted, mBlob.encrypted, encryptedLength, aes_key, 670f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root mBlob.vector, AES_DECRYPT); 671f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root digestedLength = encryptedLength - MD5_DIGEST_LENGTH; 672f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root uint8_t computedDigest[MD5_DIGEST_LENGTH]; 673f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root MD5(mBlob.digested, digestedLength, computedDigest); 674f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (memcmp(mBlob.digest, computedDigest, MD5_DIGEST_LENGTH) != 0) { 675f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return VALUE_CORRUPTED; 676f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 677f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } else { 678f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root digestedLength = encryptedLength; 679a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 680a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 681a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ssize_t maxValueLength = digestedLength - sizeof(mBlob.length); 682a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root mBlob.length = ntohl(mBlob.length); 683a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (mBlob.length < 0 || mBlob.length > maxValueLength) { 684a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return VALUE_CORRUPTED; 685a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 686a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (mBlob.info != 0) { 687a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // move info from after padding to after data 688a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root memmove(&mBlob.value[mBlob.length], &mBlob.value[maxValueLength], mBlob.info); 689a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 69007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 691a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 692a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 693a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootprivate: 694a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root struct blob mBlob; 695a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root}; 696a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 697655b958eb2180c7c06889f83f606d23421bf038cKenny Rootclass UserState { 698655b958eb2180c7c06889f83f606d23421bf038cKenny Rootpublic: 699655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState(uid_t userId) : mUserId(userId), mRetry(MAX_RETRY) { 700655b958eb2180c7c06889f83f606d23421bf038cKenny Root asprintf(&mUserDir, "user_%u", mUserId); 701655b958eb2180c7c06889f83f606d23421bf038cKenny Root asprintf(&mMasterKeyFile, "%s/.masterkey", mUserDir); 702655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 70370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 704655b958eb2180c7c06889f83f606d23421bf038cKenny Root ~UserState() { 705655b958eb2180c7c06889f83f606d23421bf038cKenny Root free(mUserDir); 706655b958eb2180c7c06889f83f606d23421bf038cKenny Root free(mMasterKeyFile); 707655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 70870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 709655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool initialize() { 710655b958eb2180c7c06889f83f606d23421bf038cKenny Root if ((mkdir(mUserDir, S_IRUSR | S_IWUSR | S_IXUSR) < 0) && (errno != EEXIST)) { 711655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGE("Could not create directory '%s'", mUserDir); 712655b958eb2180c7c06889f83f606d23421bf038cKenny Root return false; 713655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 714655b958eb2180c7c06889f83f606d23421bf038cKenny Root 715655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(mMasterKeyFile, R_OK) == 0) { 716a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root setState(STATE_LOCKED); 717a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } else { 718a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root setState(STATE_UNINITIALIZED); 719a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 72070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 721655b958eb2180c7c06889f83f606d23421bf038cKenny Root return true; 722655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 723655b958eb2180c7c06889f83f606d23421bf038cKenny Root 724655b958eb2180c7c06889f83f606d23421bf038cKenny Root uid_t getUserId() const { 725655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mUserId; 726655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 727655b958eb2180c7c06889f83f606d23421bf038cKenny Root 728655b958eb2180c7c06889f83f606d23421bf038cKenny Root const char* getUserDirName() const { 729655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mUserDir; 730655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 731655b958eb2180c7c06889f83f606d23421bf038cKenny Root 732655b958eb2180c7c06889f83f606d23421bf038cKenny Root const char* getMasterKeyFileName() const { 733655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mMasterKeyFile; 734655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 735655b958eb2180c7c06889f83f606d23421bf038cKenny Root 736655b958eb2180c7c06889f83f606d23421bf038cKenny Root void setState(State state) { 737655b958eb2180c7c06889f83f606d23421bf038cKenny Root mState = state; 738655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (mState == STATE_NO_ERROR || mState == STATE_UNINITIALIZED) { 739655b958eb2180c7c06889f83f606d23421bf038cKenny Root mRetry = MAX_RETRY; 740655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 741a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 742a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 7435187818895c4c5f650a611c40531b1dff7764c18Kenny Root State getState() const { 744a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return mState; 745a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 746a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 7475187818895c4c5f650a611c40531b1dff7764c18Kenny Root int8_t getRetry() const { 748a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return mRetry; 749a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 750a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 751655b958eb2180c7c06889f83f606d23421bf038cKenny Root void zeroizeMasterKeysInMemory() { 752655b958eb2180c7c06889f83f606d23421bf038cKenny Root memset(mMasterKey, 0, sizeof(mMasterKey)); 753655b958eb2180c7c06889f83f606d23421bf038cKenny Root memset(mSalt, 0, sizeof(mSalt)); 754655b958eb2180c7c06889f83f606d23421bf038cKenny Root memset(&mMasterKeyEncryption, 0, sizeof(mMasterKeyEncryption)); 755655b958eb2180c7c06889f83f606d23421bf038cKenny Root memset(&mMasterKeyDecryption, 0, sizeof(mMasterKeyDecryption)); 75670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 75770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 758655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode initialize(const android::String8& pw, Entropy* entropy) { 759655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!generateMasterKey(entropy)) { 760a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 761a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 762655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode response = writeMasterKey(pw, entropy); 763a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (response != NO_ERROR) { 764a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return response; 765a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 766a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root setupMasterKeys(); 76707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 768a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 769a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 7704e865753346fc6a075966972a7a98051818859dbRobin Lee ResponseCode copyMasterKey(UserState* src) { 7714e865753346fc6a075966972a7a98051818859dbRobin Lee if (mState != STATE_UNINITIALIZED) { 7724e865753346fc6a075966972a7a98051818859dbRobin Lee return ::SYSTEM_ERROR; 7734e865753346fc6a075966972a7a98051818859dbRobin Lee } 7744e865753346fc6a075966972a7a98051818859dbRobin Lee if (src->getState() != STATE_NO_ERROR) { 7754e865753346fc6a075966972a7a98051818859dbRobin Lee return ::SYSTEM_ERROR; 7764e865753346fc6a075966972a7a98051818859dbRobin Lee } 7774e865753346fc6a075966972a7a98051818859dbRobin Lee memcpy(mMasterKey, src->mMasterKey, MASTER_KEY_SIZE_BYTES); 7784e865753346fc6a075966972a7a98051818859dbRobin Lee setupMasterKeys(); 7794e865753346fc6a075966972a7a98051818859dbRobin Lee return ::NO_ERROR; 7804e865753346fc6a075966972a7a98051818859dbRobin Lee } 7814e865753346fc6a075966972a7a98051818859dbRobin Lee 782655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode writeMasterKey(const android::String8& pw, Entropy* entropy) { 783a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root uint8_t passwordKey[MASTER_KEY_SIZE_BYTES]; 784a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root generateKeyFromPassword(passwordKey, MASTER_KEY_SIZE_BYTES, pw, mSalt); 785a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root AES_KEY passwordAesKey; 786a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root AES_set_encrypt_key(passwordKey, MASTER_KEY_SIZE_BITS, &passwordAesKey); 787822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root Blob masterKeyBlob(mMasterKey, sizeof(mMasterKey), mSalt, sizeof(mSalt), TYPE_MASTER_KEY); 788f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return masterKeyBlob.writeBlob(mMasterKeyFile, &passwordAesKey, STATE_NO_ERROR, entropy); 789a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 790a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 791655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode readMasterKey(const android::String8& pw, Entropy* entropy) { 792655b958eb2180c7c06889f83f606d23421bf038cKenny Root int in = TEMP_FAILURE_RETRY(open(mMasterKeyFile, O_RDONLY)); 793150ca934edb745de3666a6492b039900df228ff0Kenny Root if (in < 0) { 794a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 795a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 796a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 797a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // we read the raw blob to just to get the salt to generate 798a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // the AES key, then we create the Blob to use with decryptBlob 799a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root blob rawBlob; 800a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root size_t length = readFully(in, (uint8_t*) &rawBlob, sizeof(rawBlob)); 801a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (close(in) != 0) { 802a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 803a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 804a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // find salt at EOF if present, otherwise we have an old file 805a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root uint8_t* salt; 806a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (length > SALT_SIZE && rawBlob.info == SALT_SIZE) { 807a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root salt = (uint8_t*) &rawBlob + length - SALT_SIZE; 808a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } else { 809a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root salt = NULL; 810a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 811a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root uint8_t passwordKey[MASTER_KEY_SIZE_BYTES]; 812a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root generateKeyFromPassword(passwordKey, MASTER_KEY_SIZE_BYTES, pw, salt); 813a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root AES_KEY passwordAesKey; 814a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root AES_set_decrypt_key(passwordKey, MASTER_KEY_SIZE_BITS, &passwordAesKey); 815a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root Blob masterKeyBlob(rawBlob); 816f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ResponseCode response = masterKeyBlob.readBlob(mMasterKeyFile, &passwordAesKey, 817f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root STATE_NO_ERROR); 818a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (response == SYSTEM_ERROR) { 819f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return response; 820a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 821a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (response == NO_ERROR && masterKeyBlob.getLength() == MASTER_KEY_SIZE_BYTES) { 822a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root // if salt was missing, generate one and write a new master key file with the salt. 823a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (salt == NULL) { 824655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!generateSalt(entropy)) { 825a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return SYSTEM_ERROR; 826a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 827655b958eb2180c7c06889f83f606d23421bf038cKenny Root response = writeMasterKey(pw, entropy); 828a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 829a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (response == NO_ERROR) { 830a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root memcpy(mMasterKey, masterKeyBlob.getValue(), MASTER_KEY_SIZE_BYTES); 831a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root setupMasterKeys(); 832a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 833a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return response; 834a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 835a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (mRetry <= 0) { 836a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root reset(); 837a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return UNINITIALIZED; 838a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 839a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root --mRetry; 840a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root switch (mRetry) { 841a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root case 0: return WRONG_PASSWORD_0; 842a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root case 1: return WRONG_PASSWORD_1; 843a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root case 2: return WRONG_PASSWORD_2; 844a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root case 3: return WRONG_PASSWORD_3; 845a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root default: return WRONG_PASSWORD_3; 846a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 847a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 848a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 849655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_KEY* getEncryptionKey() { 850655b958eb2180c7c06889f83f606d23421bf038cKenny Root return &mMasterKeyEncryption; 851655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 852a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 853655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_KEY* getDecryptionKey() { 854655b958eb2180c7c06889f83f606d23421bf038cKenny Root return &mMasterKeyDecryption; 855655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 856a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 857655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool reset() { 858655b958eb2180c7c06889f83f606d23421bf038cKenny Root DIR* dir = opendir(getUserDirName()); 859a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (!dir) { 860655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("couldn't open user directory: %s", strerror(errno)); 861a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return false; 862a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 863655b958eb2180c7c06889f83f606d23421bf038cKenny Root 864655b958eb2180c7c06889f83f606d23421bf038cKenny Root struct dirent* file; 865a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root while ((file = readdir(dir)) != NULL) { 866655b958eb2180c7c06889f83f606d23421bf038cKenny Root // We only care about files. 867655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (file->d_type != DT_REG) { 868655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 869655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 870655b958eb2180c7c06889f83f606d23421bf038cKenny Root 871655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Skip anything that starts with a "." 872931fac098f2ae35aa1da26ced57962c9a21f95cfKenny Root if (file->d_name[0] == '.' && strcmp(".masterkey", file->d_name)) { 873655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 874655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 875655b958eb2180c7c06889f83f606d23421bf038cKenny Root 876655b958eb2180c7c06889f83f606d23421bf038cKenny Root unlinkat(dirfd(dir), file->d_name, 0); 877a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 878a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root closedir(dir); 879a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return true; 880a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 881a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 882655b958eb2180c7c06889f83f606d23421bf038cKenny Rootprivate: 883655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const int MASTER_KEY_SIZE_BYTES = 16; 884655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const int MASTER_KEY_SIZE_BITS = MASTER_KEY_SIZE_BYTES * 8; 885655b958eb2180c7c06889f83f606d23421bf038cKenny Root 886655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const int MAX_RETRY = 4; 887655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const size_t SALT_SIZE = 16; 888655b958eb2180c7c06889f83f606d23421bf038cKenny Root 889655b958eb2180c7c06889f83f606d23421bf038cKenny Root void generateKeyFromPassword(uint8_t* key, ssize_t keySize, const android::String8& pw, 890655b958eb2180c7c06889f83f606d23421bf038cKenny Root uint8_t* salt) { 891655b958eb2180c7c06889f83f606d23421bf038cKenny Root size_t saltSize; 892655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (salt != NULL) { 893655b958eb2180c7c06889f83f606d23421bf038cKenny Root saltSize = SALT_SIZE; 894655b958eb2180c7c06889f83f606d23421bf038cKenny Root } else { 895655b958eb2180c7c06889f83f606d23421bf038cKenny Root // pre-gingerbread used this hardwired salt, readMasterKey will rewrite these when found 896655b958eb2180c7c06889f83f606d23421bf038cKenny Root salt = (uint8_t*) "keystore"; 897655b958eb2180c7c06889f83f606d23421bf038cKenny Root // sizeof = 9, not strlen = 8 898655b958eb2180c7c06889f83f606d23421bf038cKenny Root saltSize = sizeof("keystore"); 899655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 900655b958eb2180c7c06889f83f606d23421bf038cKenny Root 901655b958eb2180c7c06889f83f606d23421bf038cKenny Root PKCS5_PBKDF2_HMAC_SHA1(reinterpret_cast<const char*>(pw.string()), pw.length(), salt, 902655b958eb2180c7c06889f83f606d23421bf038cKenny Root saltSize, 8192, keySize, key); 903655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 904655b958eb2180c7c06889f83f606d23421bf038cKenny Root 905655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool generateSalt(Entropy* entropy) { 906655b958eb2180c7c06889f83f606d23421bf038cKenny Root return entropy->generate_random_data(mSalt, sizeof(mSalt)); 907655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 908655b958eb2180c7c06889f83f606d23421bf038cKenny Root 909655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool generateMasterKey(Entropy* entropy) { 910655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!entropy->generate_random_data(mMasterKey, sizeof(mMasterKey))) { 911655b958eb2180c7c06889f83f606d23421bf038cKenny Root return false; 912655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 913655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!generateSalt(entropy)) { 914655b958eb2180c7c06889f83f606d23421bf038cKenny Root return false; 915655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 916655b958eb2180c7c06889f83f606d23421bf038cKenny Root return true; 917655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 918655b958eb2180c7c06889f83f606d23421bf038cKenny Root 919655b958eb2180c7c06889f83f606d23421bf038cKenny Root void setupMasterKeys() { 920655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_set_encrypt_key(mMasterKey, MASTER_KEY_SIZE_BITS, &mMasterKeyEncryption); 921655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_set_decrypt_key(mMasterKey, MASTER_KEY_SIZE_BITS, &mMasterKeyDecryption); 922655b958eb2180c7c06889f83f606d23421bf038cKenny Root setState(STATE_NO_ERROR); 923655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 924655b958eb2180c7c06889f83f606d23421bf038cKenny Root 925655b958eb2180c7c06889f83f606d23421bf038cKenny Root uid_t mUserId; 926655b958eb2180c7c06889f83f606d23421bf038cKenny Root 927655b958eb2180c7c06889f83f606d23421bf038cKenny Root char* mUserDir; 928655b958eb2180c7c06889f83f606d23421bf038cKenny Root char* mMasterKeyFile; 929655b958eb2180c7c06889f83f606d23421bf038cKenny Root 930655b958eb2180c7c06889f83f606d23421bf038cKenny Root State mState; 931655b958eb2180c7c06889f83f606d23421bf038cKenny Root int8_t mRetry; 932655b958eb2180c7c06889f83f606d23421bf038cKenny Root 933655b958eb2180c7c06889f83f606d23421bf038cKenny Root uint8_t mMasterKey[MASTER_KEY_SIZE_BYTES]; 934655b958eb2180c7c06889f83f606d23421bf038cKenny Root uint8_t mSalt[SALT_SIZE]; 935655b958eb2180c7c06889f83f606d23421bf038cKenny Root 936655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_KEY mMasterKeyEncryption; 937655b958eb2180c7c06889f83f606d23421bf038cKenny Root AES_KEY mMasterKeyDecryption; 938655b958eb2180c7c06889f83f606d23421bf038cKenny Root}; 939655b958eb2180c7c06889f83f606d23421bf038cKenny Root 940655b958eb2180c7c06889f83f606d23421bf038cKenny Roottypedef struct { 941655b958eb2180c7c06889f83f606d23421bf038cKenny Root uint32_t uid; 942655b958eb2180c7c06889f83f606d23421bf038cKenny Root const uint8_t* filename; 943655b958eb2180c7c06889f83f606d23421bf038cKenny Root} grant_t; 944655b958eb2180c7c06889f83f606d23421bf038cKenny Root 945655b958eb2180c7c06889f83f606d23421bf038cKenny Rootclass KeyStore { 946655b958eb2180c7c06889f83f606d23421bf038cKenny Rootpublic: 947655b958eb2180c7c06889f83f606d23421bf038cKenny Root KeyStore(Entropy* entropy, keymaster_device_t* device) 948655b958eb2180c7c06889f83f606d23421bf038cKenny Root : mEntropy(entropy) 949655b958eb2180c7c06889f83f606d23421bf038cKenny Root , mDevice(device) 950655b958eb2180c7c06889f83f606d23421bf038cKenny Root { 951655b958eb2180c7c06889f83f606d23421bf038cKenny Root memset(&mMetaData, '\0', sizeof(mMetaData)); 952655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 953655b958eb2180c7c06889f83f606d23421bf038cKenny Root 954655b958eb2180c7c06889f83f606d23421bf038cKenny Root ~KeyStore() { 955655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<grant_t*>::iterator it(mGrants.begin()); 956655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mGrants.end(); it++) { 957655b958eb2180c7c06889f83f606d23421bf038cKenny Root delete *it; 958655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 959c35d4eb3e66aa69ca17dd83b1bcdcc19276bf8e5haitao fang mGrants.clear(); 960655b958eb2180c7c06889f83f606d23421bf038cKenny Root 961655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<UserState*>::iterator it(mMasterKeys.begin()); 962655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mMasterKeys.end(); it++) { 963655b958eb2180c7c06889f83f606d23421bf038cKenny Root delete *it; 964655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 965c35d4eb3e66aa69ca17dd83b1bcdcc19276bf8e5haitao fang mMasterKeys.clear(); 966655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 967655b958eb2180c7c06889f83f606d23421bf038cKenny Root 968655b958eb2180c7c06889f83f606d23421bf038cKenny Root keymaster_device_t* getDevice() const { 969655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mDevice; 970655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 971655b958eb2180c7c06889f83f606d23421bf038cKenny Root 972655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode initialize() { 973655b958eb2180c7c06889f83f606d23421bf038cKenny Root readMetaData(); 974655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (upgradeKeystore()) { 975655b958eb2180c7c06889f83f606d23421bf038cKenny Root writeMetaData(); 976655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 977655b958eb2180c7c06889f83f606d23421bf038cKenny Root 978655b958eb2180c7c06889f83f606d23421bf038cKenny Root return ::NO_ERROR; 979655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 980655b958eb2180c7c06889f83f606d23421bf038cKenny Root 981655b958eb2180c7c06889f83f606d23421bf038cKenny Root State getState(uid_t uid) { 982655b958eb2180c7c06889f83f606d23421bf038cKenny Root return getUserState(uid)->getState(); 983655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 984655b958eb2180c7c06889f83f606d23421bf038cKenny Root 985655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode initializeUser(const android::String8& pw, uid_t uid) { 986655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState* userState = getUserState(uid); 987655b958eb2180c7c06889f83f606d23421bf038cKenny Root return userState->initialize(pw, mEntropy); 988655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 989655b958eb2180c7c06889f83f606d23421bf038cKenny Root 9904e865753346fc6a075966972a7a98051818859dbRobin Lee ResponseCode copyMasterKey(uid_t src, uid_t uid) { 9914e865753346fc6a075966972a7a98051818859dbRobin Lee UserState *userState = getUserState(uid); 9924e865753346fc6a075966972a7a98051818859dbRobin Lee UserState *initState = getUserState(src); 9934e865753346fc6a075966972a7a98051818859dbRobin Lee return userState->copyMasterKey(initState); 9944e865753346fc6a075966972a7a98051818859dbRobin Lee } 9954e865753346fc6a075966972a7a98051818859dbRobin Lee 996655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode writeMasterKey(const android::String8& pw, uid_t uid) { 99750122db50bcb6c1aab50ef235c8f9d264b50e97aRobin Lee UserState* userState = getUserState(uid); 998655b958eb2180c7c06889f83f606d23421bf038cKenny Root return userState->writeMasterKey(pw, mEntropy); 999655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1000655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1001655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode readMasterKey(const android::String8& pw, uid_t uid) { 100250122db50bcb6c1aab50ef235c8f9d264b50e97aRobin Lee UserState* userState = getUserState(uid); 1003655b958eb2180c7c06889f83f606d23421bf038cKenny Root return userState->readMasterKey(pw, mEntropy); 1004655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1005655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1006655b958eb2180c7c06889f83f606d23421bf038cKenny Root android::String8 getKeyName(const android::String8& keyName) { 1007a77e809ecff5190790906fb7a3c527259c735071Douglas Leung char encoded[encode_key_length(keyName) + 1]; // add 1 for null char 1008655b958eb2180c7c06889f83f606d23421bf038cKenny Root encode_key(encoded, keyName); 1009655b958eb2180c7c06889f83f606d23421bf038cKenny Root return android::String8(encoded); 1010655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1011655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1012655b958eb2180c7c06889f83f606d23421bf038cKenny Root android::String8 getKeyNameForUid(const android::String8& keyName, uid_t uid) { 1013a77e809ecff5190790906fb7a3c527259c735071Douglas Leung char encoded[encode_key_length(keyName) + 1]; // add 1 for null char 1014655b958eb2180c7c06889f83f606d23421bf038cKenny Root encode_key(encoded, keyName); 1015655b958eb2180c7c06889f83f606d23421bf038cKenny Root return android::String8::format("%u_%s", uid, encoded); 1016655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1017655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1018655b958eb2180c7c06889f83f606d23421bf038cKenny Root android::String8 getKeyNameForUidWithDir(const android::String8& keyName, uid_t uid) { 1019a77e809ecff5190790906fb7a3c527259c735071Douglas Leung char encoded[encode_key_length(keyName) + 1]; // add 1 for null char 1020655b958eb2180c7c06889f83f606d23421bf038cKenny Root encode_key(encoded, keyName); 1021655b958eb2180c7c06889f83f606d23421bf038cKenny Root return android::String8::format("%s/%u_%s", getUserState(uid)->getUserDirName(), uid, 1022655b958eb2180c7c06889f83f606d23421bf038cKenny Root encoded); 1023655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1024655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1025655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool reset(uid_t uid) { 10264b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee android::String8 prefix(""); 10274b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee android::Vector<android::String16> aliases; 10284b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (saw(prefix, &aliases, uid) != ::NO_ERROR) { 10294b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return ::SYSTEM_ERROR; 10304b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 10314b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 1032655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState* userState = getUserState(uid); 10334b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee for (uint32_t i = 0; i < aliases.size(); i++) { 10344b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee android::String8 filename(aliases[i]); 10354b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee filename = android::String8::format("%s/%s", userState->getUserDirName(), 10364b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee getKeyName(filename).string()); 10374b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee del(filename, ::TYPE_ANY, uid); 10384b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 10394b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 1040655b958eb2180c7c06889f83f606d23421bf038cKenny Root userState->zeroizeMasterKeysInMemory(); 1041655b958eb2180c7c06889f83f606d23421bf038cKenny Root userState->setState(STATE_UNINITIALIZED); 1042655b958eb2180c7c06889f83f606d23421bf038cKenny Root return userState->reset(); 1043655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1044655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1045655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool isEmpty(uid_t uid) const { 1046655b958eb2180c7c06889f83f606d23421bf038cKenny Root const UserState* userState = getUserState(uid); 104731e27468b6d822adbd2aec9219a68c206aa6957cKenny Root if (userState == NULL || userState->getState() == STATE_UNINITIALIZED) { 1048655b958eb2180c7c06889f83f606d23421bf038cKenny Root return true; 1049655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1050655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1051655b958eb2180c7c06889f83f606d23421bf038cKenny Root DIR* dir = opendir(userState->getUserDirName()); 1052a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (!dir) { 1053a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return true; 1054a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1055655b958eb2180c7c06889f83f606d23421bf038cKenny Root 105631e27468b6d822adbd2aec9219a68c206aa6957cKenny Root bool result = true; 105731e27468b6d822adbd2aec9219a68c206aa6957cKenny Root struct dirent* file; 1058a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root while ((file = readdir(dir)) != NULL) { 1059655b958eb2180c7c06889f83f606d23421bf038cKenny Root // We only care about files. 1060655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (file->d_type != DT_REG) { 1061655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1062655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1063655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1064655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Skip anything that starts with a "." 1065655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (file->d_name[0] == '.') { 1066655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1067655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1068655b958eb2180c7c06889f83f606d23421bf038cKenny Root 106931e27468b6d822adbd2aec9219a68c206aa6957cKenny Root result = false; 107031e27468b6d822adbd2aec9219a68c206aa6957cKenny Root break; 1071a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1072a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root closedir(dir); 1073a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return result; 1074a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1075a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1076655b958eb2180c7c06889f83f606d23421bf038cKenny Root void lock(uid_t uid) { 1077655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState* userState = getUserState(uid); 1078655b958eb2180c7c06889f83f606d23421bf038cKenny Root userState->zeroizeMasterKeysInMemory(); 1079655b958eb2180c7c06889f83f606d23421bf038cKenny Root userState->setState(STATE_LOCKED); 1080a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1081a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1082655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode get(const char* filename, Blob* keyBlob, const BlobType type, uid_t uid) { 1083655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState* userState = getUserState(uid); 1084f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ResponseCode rc = keyBlob->readBlob(filename, userState->getDecryptionKey(), 1085f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root userState->getState()); 1086822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (rc != NO_ERROR) { 1087822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return rc; 1088822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1089822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1090822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root const uint8_t version = keyBlob->getVersion(); 109107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (version < CURRENT_BLOB_VERSION) { 1092cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root /* If we upgrade the key, we need to write it to disk again. Then 1093cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root * it must be read it again since the blob is encrypted each time 1094cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root * it's written. 1095cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root */ 1096655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (upgradeBlob(filename, keyBlob, version, type, uid)) { 1097655b958eb2180c7c06889f83f606d23421bf038cKenny Root if ((rc = this->put(filename, keyBlob, uid)) != NO_ERROR 1098f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root || (rc = keyBlob->readBlob(filename, userState->getDecryptionKey(), 1099f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root userState->getState())) != NO_ERROR) { 1100cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root return rc; 1101cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root } 1102cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root } 1103822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1104822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 110517208e0de5a42722901d803118745cca25fd10c1Kenny Root /* 110617208e0de5a42722901d803118745cca25fd10c1Kenny Root * This will upgrade software-backed keys to hardware-backed keys when 110717208e0de5a42722901d803118745cca25fd10c1Kenny Root * the HAL for the device supports the newer key types. 110817208e0de5a42722901d803118745cca25fd10c1Kenny Root */ 110917208e0de5a42722901d803118745cca25fd10c1Kenny Root if (rc == NO_ERROR && type == TYPE_KEY_PAIR 111017208e0de5a42722901d803118745cca25fd10c1Kenny Root && mDevice->common.module->module_api_version >= KEYMASTER_MODULE_API_VERSION_0_2 111117208e0de5a42722901d803118745cca25fd10c1Kenny Root && keyBlob->isFallback()) { 111217208e0de5a42722901d803118745cca25fd10c1Kenny Root ResponseCode imported = importKey(keyBlob->getValue(), keyBlob->getLength(), filename, 111317208e0de5a42722901d803118745cca25fd10c1Kenny Root uid, keyBlob->isEncrypted() ? KEYSTORE_FLAG_ENCRYPTED : KEYSTORE_FLAG_NONE); 111417208e0de5a42722901d803118745cca25fd10c1Kenny Root 111517208e0de5a42722901d803118745cca25fd10c1Kenny Root // The HAL allowed the import, reget the key to have the "fresh" 111617208e0de5a42722901d803118745cca25fd10c1Kenny Root // version. 111717208e0de5a42722901d803118745cca25fd10c1Kenny Root if (imported == NO_ERROR) { 111817208e0de5a42722901d803118745cca25fd10c1Kenny Root rc = get(filename, keyBlob, TYPE_KEY_PAIR, uid); 111917208e0de5a42722901d803118745cca25fd10c1Kenny Root } 112017208e0de5a42722901d803118745cca25fd10c1Kenny Root } 112117208e0de5a42722901d803118745cca25fd10c1Kenny Root 1122d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (type != TYPE_ANY && keyBlob->getType() != type) { 1123822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGW("key found but type doesn't match: %d vs %d", keyBlob->getType(), type); 1124822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return KEY_NOT_FOUND; 1125822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1126822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1127822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return rc; 1128a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1129a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1130655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode put(const char* filename, Blob* keyBlob, uid_t uid) { 1131655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState* userState = getUserState(uid); 1132f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return keyBlob->writeBlob(filename, userState->getEncryptionKey(), userState->getState(), 1133f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root mEntropy); 1134a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1135a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 11364b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee ResponseCode del(const char *filename, const BlobType type, uid_t uid) { 11374b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee Blob keyBlob; 11384b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee ResponseCode rc = get(filename, &keyBlob, type, uid); 11394b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (rc != ::NO_ERROR) { 11404b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return rc; 11414b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 11424b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 11434b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (keyBlob.getType() == ::TYPE_KEY_PAIR) { 11444b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee // A device doesn't have to implement delete_keypair. 11454b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (mDevice->delete_keypair != NULL && !keyBlob.isFallback()) { 11464b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (mDevice->delete_keypair(mDevice, keyBlob.getValue(), keyBlob.getLength())) { 11474b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee rc = ::SYSTEM_ERROR; 11484b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 11494b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 11504b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 11514b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (rc != ::NO_ERROR) { 11524b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return rc; 11534b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 11544b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 11554b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return (unlink(filename) && errno != ENOENT) ? ::SYSTEM_ERROR : ::NO_ERROR; 11564b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 11574b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 11584b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee ResponseCode saw(const android::String8& prefix, android::Vector<android::String16> *matches, 11594b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee uid_t uid) { 11604b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 11614b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee UserState* userState = getUserState(uid); 11624b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee size_t n = prefix.length(); 11634b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 11644b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee DIR* dir = opendir(userState->getUserDirName()); 11654b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (!dir) { 11664b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee ALOGW("can't open directory for user: %s", strerror(errno)); 11674b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return ::SYSTEM_ERROR; 11684b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 11694b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 11704b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee struct dirent* file; 11714b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee while ((file = readdir(dir)) != NULL) { 11724b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee // We only care about files. 11734b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (file->d_type != DT_REG) { 11744b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee continue; 11754b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 11764b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 11774b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee // Skip anything that starts with a "." 11784b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (file->d_name[0] == '.') { 11794b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee continue; 11804b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 11814b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 11824b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (!strncmp(prefix.string(), file->d_name, n)) { 11834b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee const char* p = &file->d_name[n]; 11844b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee size_t plen = strlen(p); 11854b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 11864b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee size_t extra = decode_key_length(p, plen); 11874b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee char *match = (char*) malloc(extra + 1); 11884b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (match != NULL) { 11894b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee decode_key(match, p, plen); 11904b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee matches->push(android::String16(match, extra)); 11914b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee free(match); 11924b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } else { 11934b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee ALOGW("could not allocate match of size %zd", extra); 11944b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 11954b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 11964b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 11974b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee closedir(dir); 11984b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return ::NO_ERROR; 11994b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee } 12004b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 120107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root void addGrant(const char* filename, uid_t granteeUid) { 1202655b958eb2180c7c06889f83f606d23421bf038cKenny Root const grant_t* existing = getGrant(filename, granteeUid); 1203655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (existing == NULL) { 1204655b958eb2180c7c06889f83f606d23421bf038cKenny Root grant_t* grant = new grant_t; 120507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root grant->uid = granteeUid; 1206a8c703d9fdd98e3caefb6e74cd03c2878cecd0a1Brian Carlstrom grant->filename = reinterpret_cast<const uint8_t*>(strdup(filename)); 1207655b958eb2180c7c06889f83f606d23421bf038cKenny Root mGrants.add(grant); 120870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 120970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 121070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 121107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root bool removeGrant(const char* filename, uid_t granteeUid) { 1212655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<grant_t*>::iterator it(mGrants.begin()); 1213655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mGrants.end(); it++) { 1214655b958eb2180c7c06889f83f606d23421bf038cKenny Root grant_t* grant = *it; 1215655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (grant->uid == granteeUid 1216655b958eb2180c7c06889f83f606d23421bf038cKenny Root && !strcmp(reinterpret_cast<const char*>(grant->filename), filename)) { 1217655b958eb2180c7c06889f83f606d23421bf038cKenny Root mGrants.erase(it); 1218655b958eb2180c7c06889f83f606d23421bf038cKenny Root return true; 1219655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 122070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 122170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return false; 122270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 122370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1224a8c703d9fdd98e3caefb6e74cd03c2878cecd0a1Brian Carlstrom bool hasGrant(const char* filename, const uid_t uid) const { 1225a8c703d9fdd98e3caefb6e74cd03c2878cecd0a1Brian Carlstrom return getGrant(filename, uid) != NULL; 122670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 122770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1228f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ResponseCode importKey(const uint8_t* key, size_t keyLen, const char* filename, uid_t uid, 1229f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root int32_t flags) { 1230822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root uint8_t* data; 1231822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root size_t dataLength; 1232822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root int rc; 1233822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1234822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (mDevice->import_keypair == NULL) { 1235822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGE("Keymaster doesn't support import!"); 1236822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return SYSTEM_ERROR; 1237822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1238822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 123917208e0de5a42722901d803118745cca25fd10c1Kenny Root bool isFallback = false; 124007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root rc = mDevice->import_keypair(mDevice, key, keyLen, &data, &dataLength); 1241822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (rc) { 124217208e0de5a42722901d803118745cca25fd10c1Kenny Root // If this is an old device HAL, try to fall back to an old version 124317208e0de5a42722901d803118745cca25fd10c1Kenny Root if (mDevice->common.module->module_api_version < KEYMASTER_MODULE_API_VERSION_0_2) { 124417208e0de5a42722901d803118745cca25fd10c1Kenny Root rc = openssl_import_keypair(mDevice, key, keyLen, &data, &dataLength); 124517208e0de5a42722901d803118745cca25fd10c1Kenny Root isFallback = true; 124617208e0de5a42722901d803118745cca25fd10c1Kenny Root } 124717208e0de5a42722901d803118745cca25fd10c1Kenny Root 124817208e0de5a42722901d803118745cca25fd10c1Kenny Root if (rc) { 124917208e0de5a42722901d803118745cca25fd10c1Kenny Root ALOGE("Error while importing keypair: %d", rc); 125017208e0de5a42722901d803118745cca25fd10c1Kenny Root return SYSTEM_ERROR; 125117208e0de5a42722901d803118745cca25fd10c1Kenny Root } 1252822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1253822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1254822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root Blob keyBlob(data, dataLength, NULL, 0, TYPE_KEY_PAIR); 1255822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root free(data); 1256822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1257f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root keyBlob.setEncrypted(flags & KEYSTORE_FLAG_ENCRYPTED); 125817208e0de5a42722901d803118745cca25fd10c1Kenny Root keyBlob.setFallback(isFallback); 1259f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 1260655b958eb2180c7c06889f83f606d23421bf038cKenny Root return put(filename, &keyBlob, uid); 1261822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1262822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 12631b0e3933900c7ea21189704d5db64e7346aee7afKenny Root bool isHardwareBacked(const android::String16& keyType) const { 12641b0e3933900c7ea21189704d5db64e7346aee7afKenny Root if (mDevice == NULL) { 12651b0e3933900c7ea21189704d5db64e7346aee7afKenny Root ALOGW("can't get keymaster device"); 12661b0e3933900c7ea21189704d5db64e7346aee7afKenny Root return false; 12671b0e3933900c7ea21189704d5db64e7346aee7afKenny Root } 12681b0e3933900c7ea21189704d5db64e7346aee7afKenny Root 12691b0e3933900c7ea21189704d5db64e7346aee7afKenny Root if (sRSAKeyType == keyType) { 12701b0e3933900c7ea21189704d5db64e7346aee7afKenny Root return (mDevice->flags & KEYMASTER_SOFTWARE_ONLY) == 0; 12711b0e3933900c7ea21189704d5db64e7346aee7afKenny Root } else { 12721b0e3933900c7ea21189704d5db64e7346aee7afKenny Root return (mDevice->flags & KEYMASTER_SOFTWARE_ONLY) == 0 12731b0e3933900c7ea21189704d5db64e7346aee7afKenny Root && (mDevice->common.module->module_api_version 12741b0e3933900c7ea21189704d5db64e7346aee7afKenny Root >= KEYMASTER_MODULE_API_VERSION_0_2); 12751b0e3933900c7ea21189704d5db64e7346aee7afKenny Root } 12768ddf35a6e1fd80a7d0685041d2bfc77078277c9dKenny Root } 12778ddf35a6e1fd80a7d0685041d2bfc77078277c9dKenny Root 1278655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode getKeyForName(Blob* keyBlob, const android::String8& keyName, const uid_t uid, 1279655b958eb2180c7c06889f83f606d23421bf038cKenny Root const BlobType type) { 128086b16e8c0d353af97f0411917789308dba417295Kenny Root android::String8 filepath8(getKeyNameForUidWithDir(keyName, uid)); 1281a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1282655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode responseCode = get(filepath8.string(), keyBlob, type, uid); 1283655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (responseCode == NO_ERROR) { 1284655b958eb2180c7c06889f83f606d23421bf038cKenny Root return responseCode; 1285655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1286a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1287655b958eb2180c7c06889f83f606d23421bf038cKenny Root // If this is one of the legacy UID->UID mappings, use it. 1288655b958eb2180c7c06889f83f606d23421bf038cKenny Root uid_t euid = get_keystore_euid(uid); 1289655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (euid != uid) { 129086b16e8c0d353af97f0411917789308dba417295Kenny Root filepath8 = getKeyNameForUidWithDir(keyName, euid); 1291655b958eb2180c7c06889f83f606d23421bf038cKenny Root responseCode = get(filepath8.string(), keyBlob, type, uid); 1292655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (responseCode == NO_ERROR) { 1293655b958eb2180c7c06889f83f606d23421bf038cKenny Root return responseCode; 1294655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1295655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 129670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1297655b958eb2180c7c06889f83f606d23421bf038cKenny Root // They might be using a granted key. 129886b16e8c0d353af97f0411917789308dba417295Kenny Root android::String8 filename8 = getKeyName(keyName); 1299655b958eb2180c7c06889f83f606d23421bf038cKenny Root char* end; 130086b16e8c0d353af97f0411917789308dba417295Kenny Root strtoul(filename8.string(), &end, 10); 1301655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (end[0] != '_' || end[1] == 0) { 1302655b958eb2180c7c06889f83f606d23421bf038cKenny Root return KEY_NOT_FOUND; 1303655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 130486b16e8c0d353af97f0411917789308dba417295Kenny Root filepath8 = android::String8::format("%s/%s", getUserState(uid)->getUserDirName(), 130586b16e8c0d353af97f0411917789308dba417295Kenny Root filename8.string()); 1306655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!hasGrant(filepath8.string(), uid)) { 1307655b958eb2180c7c06889f83f606d23421bf038cKenny Root return responseCode; 1308a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1309a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1310655b958eb2180c7c06889f83f606d23421bf038cKenny Root // It is a granted key. Try to load it. 1311655b958eb2180c7c06889f83f606d23421bf038cKenny Root return get(filepath8.string(), keyBlob, type, uid); 1312a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1313a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1314655b958eb2180c7c06889f83f606d23421bf038cKenny Root /** 1315655b958eb2180c7c06889f83f606d23421bf038cKenny Root * Returns any existing UserState or creates it if it doesn't exist. 1316655b958eb2180c7c06889f83f606d23421bf038cKenny Root */ 1317655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState* getUserState(uid_t uid) { 1318655b958eb2180c7c06889f83f606d23421bf038cKenny Root uid_t userId = get_user_id(uid); 1319655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1320655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<UserState*>::iterator it(mMasterKeys.begin()); 1321655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mMasterKeys.end(); it++) { 1322655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState* state = *it; 1323655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (state->getUserId() == userId) { 1324655b958eb2180c7c06889f83f606d23421bf038cKenny Root return state; 1325655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1326a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1327655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1328655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState* userState = new UserState(userId); 1329655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!userState->initialize()) { 1330655b958eb2180c7c06889f83f606d23421bf038cKenny Root /* There's not much we can do if initialization fails. Trying to 1331655b958eb2180c7c06889f83f606d23421bf038cKenny Root * unlock the keystore for that user will fail as well, so any 1332655b958eb2180c7c06889f83f606d23421bf038cKenny Root * subsequent request for this user will just return SYSTEM_ERROR. 1333655b958eb2180c7c06889f83f606d23421bf038cKenny Root */ 1334655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGE("User initialization failed for %u; subsuquent operations will fail", userId); 1335a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1336655b958eb2180c7c06889f83f606d23421bf038cKenny Root mMasterKeys.add(userState); 1337655b958eb2180c7c06889f83f606d23421bf038cKenny Root return userState; 1338a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1339a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1340655b958eb2180c7c06889f83f606d23421bf038cKenny Root /** 1341655b958eb2180c7c06889f83f606d23421bf038cKenny Root * Returns NULL if the UserState doesn't already exist. 1342655b958eb2180c7c06889f83f606d23421bf038cKenny Root */ 1343655b958eb2180c7c06889f83f606d23421bf038cKenny Root const UserState* getUserState(uid_t uid) const { 1344655b958eb2180c7c06889f83f606d23421bf038cKenny Root uid_t userId = get_user_id(uid); 1345655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1346655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<UserState*>::const_iterator it(mMasterKeys.begin()); 1347655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mMasterKeys.end(); it++) { 1348655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState* state = *it; 1349655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (state->getUserId() == userId) { 1350655b958eb2180c7c06889f83f606d23421bf038cKenny Root return state; 1351655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1352655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1353a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1354655b958eb2180c7c06889f83f606d23421bf038cKenny Root return NULL; 1355a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1356a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1357655b958eb2180c7c06889f83f606d23421bf038cKenny Rootprivate: 1358655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const char* sOldMasterKey; 1359655b958eb2180c7c06889f83f606d23421bf038cKenny Root static const char* sMetaDataFile; 13601b0e3933900c7ea21189704d5db64e7346aee7afKenny Root static const android::String16 sRSAKeyType; 1361655b958eb2180c7c06889f83f606d23421bf038cKenny Root Entropy* mEntropy; 136207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 1363655b958eb2180c7c06889f83f606d23421bf038cKenny Root keymaster_device_t* mDevice; 1364a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1365655b958eb2180c7c06889f83f606d23421bf038cKenny Root android::Vector<UserState*> mMasterKeys; 1366655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1367655b958eb2180c7c06889f83f606d23421bf038cKenny Root android::Vector<grant_t*> mGrants; 136870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1369655b958eb2180c7c06889f83f606d23421bf038cKenny Root typedef struct { 1370655b958eb2180c7c06889f83f606d23421bf038cKenny Root uint32_t version; 1371655b958eb2180c7c06889f83f606d23421bf038cKenny Root } keystore_metadata_t; 137270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1373655b958eb2180c7c06889f83f606d23421bf038cKenny Root keystore_metadata_t mMetaData; 1374655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1375655b958eb2180c7c06889f83f606d23421bf038cKenny Root const grant_t* getGrant(const char* filename, uid_t uid) const { 1376655b958eb2180c7c06889f83f606d23421bf038cKenny Root for (android::Vector<grant_t*>::const_iterator it(mGrants.begin()); 1377655b958eb2180c7c06889f83f606d23421bf038cKenny Root it != mGrants.end(); it++) { 1378655b958eb2180c7c06889f83f606d23421bf038cKenny Root grant_t* grant = *it; 137970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root if (grant->uid == uid 1380655b958eb2180c7c06889f83f606d23421bf038cKenny Root && !strcmp(reinterpret_cast<const char*>(grant->filename), filename)) { 138170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return grant; 138270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 138370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 138470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return NULL; 138570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 138670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1387822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root /** 1388822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Upgrade code. This will upgrade the key from the current version 1389822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * to whatever is newest. 1390822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root */ 1391655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool upgradeBlob(const char* filename, Blob* blob, const uint8_t oldVersion, 1392655b958eb2180c7c06889f83f606d23421bf038cKenny Root const BlobType type, uid_t uid) { 1393822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root bool updated = false; 1394822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root uint8_t version = oldVersion; 1395822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1396822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root /* From V0 -> V1: All old types were unknown */ 1397822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (version == 0) { 1398822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGV("upgrading to version 1 and setting type %d", type); 1399822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1400822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root blob->setType(type); 1401822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (type == TYPE_KEY_PAIR) { 1402655b958eb2180c7c06889f83f606d23421bf038cKenny Root importBlobAsKey(blob, filename, uid); 1403822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1404822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root version = 1; 1405822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root updated = true; 1406822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1407822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1408f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root /* From V1 -> V2: All old keys were encrypted */ 1409f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if (version == 1) { 1410f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ALOGV("upgrading to version 2"); 1411f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 1412f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root blob->setEncrypted(true); 1413f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root version = 2; 1414f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root updated = true; 1415f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 1416f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 1417822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root /* 1418822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * If we've updated, set the key blob to the right version 1419822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * and write it. 1420cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root */ 1421822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (updated) { 1422822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGV("updated and writing file %s", filename); 1423822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root blob->setVersion(version); 1424822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1425cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root 1426cfeae072c96d84f286ddbf0aff8055c12c7c4f15Kenny Root return updated; 1427822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1428822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1429822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root /** 1430822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Takes a blob that is an PEM-encoded RSA key as a byte array and 1431822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * converts it to a DER-encoded PKCS#8 for import into a keymaster. 1432822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * Then it overwrites the original blob with the new blob 1433822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root * format that is returned from the keymaster. 1434822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root */ 1435655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode importBlobAsKey(Blob* blob, const char* filename, uid_t uid) { 1436822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root // We won't even write to the blob directly with this BIO, so const_cast is okay. 1437822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root Unique_BIO b(BIO_new_mem_buf(const_cast<uint8_t*>(blob->getValue()), blob->getLength())); 1438822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (b.get() == NULL) { 1439822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGE("Problem instantiating BIO"); 1440822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return SYSTEM_ERROR; 1441822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1442822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1443822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root Unique_EVP_PKEY pkey(PEM_read_bio_PrivateKey(b.get(), NULL, NULL, NULL)); 1444822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (pkey.get() == NULL) { 1445822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGE("Couldn't read old PEM file"); 1446822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return SYSTEM_ERROR; 1447822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1448822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1449822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root Unique_PKCS8_PRIV_KEY_INFO pkcs8(EVP_PKEY2PKCS8(pkey.get())); 1450822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root int len = i2d_PKCS8_PRIV_KEY_INFO(pkcs8.get(), NULL); 1451822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (len < 0) { 1452822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGE("Couldn't measure PKCS#8 length"); 1453822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return SYSTEM_ERROR; 1454822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1455822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 145670c9889c5ca912e7c492580e1999f18ab65b267bKenny Root UniquePtr<unsigned char[]> pkcs8key(new unsigned char[len]); 145770c9889c5ca912e7c492580e1999f18ab65b267bKenny Root uint8_t* tmp = pkcs8key.get(); 1458822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (i2d_PKCS8_PRIV_KEY_INFO(pkcs8.get(), &tmp) != len) { 1459822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root ALOGE("Couldn't convert to PKCS#8"); 1460822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return SYSTEM_ERROR; 1461822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1462822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1463f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ResponseCode rc = importKey(pkcs8key.get(), len, filename, uid, 1464f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root blob->isEncrypted() ? KEYSTORE_FLAG_ENCRYPTED : KEYSTORE_FLAG_NONE); 1465822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root if (rc != NO_ERROR) { 1466822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root return rc; 1467822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 1468822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root 1469655b958eb2180c7c06889f83f606d23421bf038cKenny Root return get(filename, blob, TYPE_KEY_PAIR, uid); 1470822c3a99d930e9299e2fad2fb3e0ff91b119b95aKenny Root } 147170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1472655b958eb2180c7c06889f83f606d23421bf038cKenny Root void readMetaData() { 1473655b958eb2180c7c06889f83f606d23421bf038cKenny Root int in = TEMP_FAILURE_RETRY(open(sMetaDataFile, O_RDONLY)); 1474655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (in < 0) { 1475655b958eb2180c7c06889f83f606d23421bf038cKenny Root return; 1476655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1477655b958eb2180c7c06889f83f606d23421bf038cKenny Root size_t fileLength = readFully(in, (uint8_t*) &mMetaData, sizeof(mMetaData)); 1478655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (fileLength != sizeof(mMetaData)) { 1479655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGI("Metadata file is %zd bytes (%zd experted); upgrade?", fileLength, 1480655b958eb2180c7c06889f83f606d23421bf038cKenny Root sizeof(mMetaData)); 1481655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1482655b958eb2180c7c06889f83f606d23421bf038cKenny Root close(in); 148370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 148470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1485655b958eb2180c7c06889f83f606d23421bf038cKenny Root void writeMetaData() { 1486655b958eb2180c7c06889f83f606d23421bf038cKenny Root const char* tmpFileName = ".metadata.tmp"; 1487655b958eb2180c7c06889f83f606d23421bf038cKenny Root int out = TEMP_FAILURE_RETRY(open(tmpFileName, 1488655b958eb2180c7c06889f83f606d23421bf038cKenny Root O_WRONLY | O_TRUNC | O_CREAT, S_IRUSR | S_IWUSR)); 1489655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (out < 0) { 1490655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGE("couldn't write metadata file: %s", strerror(errno)); 1491655b958eb2180c7c06889f83f606d23421bf038cKenny Root return; 1492655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1493655b958eb2180c7c06889f83f606d23421bf038cKenny Root size_t fileLength = writeFully(out, (uint8_t*) &mMetaData, sizeof(mMetaData)); 1494655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (fileLength != sizeof(mMetaData)) { 1495655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGI("Could only write %zd bytes to metadata file (%zd expected)", fileLength, 1496655b958eb2180c7c06889f83f606d23421bf038cKenny Root sizeof(mMetaData)); 149770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 1498655b958eb2180c7c06889f83f606d23421bf038cKenny Root close(out); 1499655b958eb2180c7c06889f83f606d23421bf038cKenny Root rename(tmpFileName, sMetaDataFile); 150070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 150170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1502655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool upgradeKeystore() { 1503655b958eb2180c7c06889f83f606d23421bf038cKenny Root bool upgraded = false; 1504655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1505655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (mMetaData.version == 0) { 1506655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState* userState = getUserState(0); 1507655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1508655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Initialize first so the directory is made. 1509655b958eb2180c7c06889f83f606d23421bf038cKenny Root userState->initialize(); 1510655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1511655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Migrate the old .masterkey file to user 0. 1512655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(sOldMasterKey, R_OK) == 0) { 1513655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (rename(sOldMasterKey, userState->getMasterKeyFileName()) < 0) { 1514655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGE("couldn't migrate old masterkey: %s", strerror(errno)); 1515655b958eb2180c7c06889f83f606d23421bf038cKenny Root return false; 1516655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1517655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1518655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1519655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Initialize again in case we had a key. 1520655b958eb2180c7c06889f83f606d23421bf038cKenny Root userState->initialize(); 1521655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1522655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Try to migrate existing keys. 1523655b958eb2180c7c06889f83f606d23421bf038cKenny Root DIR* dir = opendir("."); 1524655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (!dir) { 1525655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Give up now; maybe we can upgrade later. 1526655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGE("couldn't open keystore's directory; something is wrong"); 1527655b958eb2180c7c06889f83f606d23421bf038cKenny Root return false; 1528655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1529655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1530655b958eb2180c7c06889f83f606d23421bf038cKenny Root struct dirent* file; 1531655b958eb2180c7c06889f83f606d23421bf038cKenny Root while ((file = readdir(dir)) != NULL) { 1532655b958eb2180c7c06889f83f606d23421bf038cKenny Root // We only care about files. 1533655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (file->d_type != DT_REG) { 1534655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1535655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1536655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1537655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Skip anything that starts with a "." 1538655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (file->d_name[0] == '.') { 1539655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1540655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1541655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1542655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Find the current file's user. 1543655b958eb2180c7c06889f83f606d23421bf038cKenny Root char* end; 1544655b958eb2180c7c06889f83f606d23421bf038cKenny Root unsigned long thisUid = strtoul(file->d_name, &end, 10); 1545655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (end[0] != '_' || end[1] == 0) { 1546655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1547655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1548655b958eb2180c7c06889f83f606d23421bf038cKenny Root UserState* otherUser = getUserState(thisUid); 1549655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (otherUser->getUserId() != 0) { 1550655b958eb2180c7c06889f83f606d23421bf038cKenny Root unlinkat(dirfd(dir), file->d_name, 0); 1551655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1552655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1553655b958eb2180c7c06889f83f606d23421bf038cKenny Root // Rename the file into user directory. 1554655b958eb2180c7c06889f83f606d23421bf038cKenny Root DIR* otherdir = opendir(otherUser->getUserDirName()); 1555655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (otherdir == NULL) { 1556655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("couldn't open user directory for rename"); 1557655b958eb2180c7c06889f83f606d23421bf038cKenny Root continue; 1558655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1559655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (renameat(dirfd(dir), file->d_name, dirfd(otherdir), file->d_name) < 0) { 1560655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("couldn't rename blob: %s: %s", file->d_name, strerror(errno)); 1561655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1562655b958eb2180c7c06889f83f606d23421bf038cKenny Root closedir(otherdir); 1563655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1564655b958eb2180c7c06889f83f606d23421bf038cKenny Root closedir(dir); 1565655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1566655b958eb2180c7c06889f83f606d23421bf038cKenny Root mMetaData.version = 1; 1567655b958eb2180c7c06889f83f606d23421bf038cKenny Root upgraded = true; 1568655b958eb2180c7c06889f83f606d23421bf038cKenny Root } 1569655b958eb2180c7c06889f83f606d23421bf038cKenny Root 1570655b958eb2180c7c06889f83f606d23421bf038cKenny Root return upgraded; 157170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 1572655b958eb2180c7c06889f83f606d23421bf038cKenny Root}; 157370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1574655b958eb2180c7c06889f83f606d23421bf038cKenny Rootconst char* KeyStore::sOldMasterKey = ".masterkey"; 1575655b958eb2180c7c06889f83f606d23421bf038cKenny Rootconst char* KeyStore::sMetaDataFile = ".metadata"; 157670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 15771b0e3933900c7ea21189704d5db64e7346aee7afKenny Rootconst android::String16 KeyStore::sRSAKeyType("RSA"); 15781b0e3933900c7ea21189704d5db64e7346aee7afKenny Root 157907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootnamespace android { 158007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootclass KeyStoreProxy : public BnKeystoreService, public IBinder::DeathRecipient { 158107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootpublic: 158207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root KeyStoreProxy(KeyStore* keyStore) 158307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root : mKeyStore(keyStore) 158407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root { 158507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1586a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 158707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root void binderDied(const wp<IBinder>&) { 158807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ALOGE("binder death detected"); 158907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1590a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 159107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t test() { 1592d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 1593eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 1594eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_TEST, spid)) { 1595d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: test", callingUid); 159607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 159707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1598a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1599655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mKeyStore->getState(callingUid); 1600a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1601a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 160207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t get(const String16& name, uint8_t** item, size_t* itemLength) { 1603d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 1604eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 1605eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_GET, spid)) { 1606d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: get", callingUid); 160707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 160807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1609a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 161007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 161107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root Blob keyBlob; 161266dbf67dd65b4808a15ef64f0ffde1275bdd58a9Nick Kralevich 1613655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode responseCode = mKeyStore->getKeyForName(&keyBlob, name8, callingUid, 1614494689083467ec372a58f094f041c8f102f39393Kenny Root TYPE_GENERIC); 161507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (responseCode != ::NO_ERROR) { 1616655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("Could not read %s", name8.string()); 161707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *item = NULL; 161807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *itemLength = 0; 161907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return responseCode; 162007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 162107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 162207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *item = (uint8_t*) malloc(keyBlob.getLength()); 162307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root memcpy(*item, keyBlob.getValue(), keyBlob.getLength()); 162407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root *itemLength = keyBlob.getLength(); 162507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 162607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 1627a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1628a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1629f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root int32_t insert(const String16& name, const uint8_t* item, size_t itemLength, int targetUid, 1630f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root int32_t flags) { 1631eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 1632d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 1633eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_INSERT, spid)) { 1634d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: insert", callingUid); 163507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 163607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 163707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 1638f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root State state = mKeyStore->getState(callingUid); 1639f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if ((flags & KEYSTORE_FLAG_ENCRYPTED) && !isKeystoreUnlocked(state)) { 1640f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ALOGD("calling get in state: %d", state); 1641f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root return state; 1642f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root } 1643f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root 1644494689083467ec372a58f094f041c8f102f39393Kenny Root if (targetUid == -1) { 1645494689083467ec372a58f094f041c8f102f39393Kenny Root targetUid = callingUid; 1646494689083467ec372a58f094f041c8f102f39393Kenny Root } else if (!is_granted_to(callingUid, targetUid)) { 1647b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root return ::PERMISSION_DENIED; 1648b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root } 1649b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root 165007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 1651655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid)); 165207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 165307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root Blob keyBlob(item, itemLength, NULL, 0, ::TYPE_GENERIC); 1654ee8068b9e7bfb2770635062fc9c2035be2142bd8Kenny Root keyBlob.setEncrypted(flags & KEYSTORE_FLAG_ENCRYPTED); 1655ee8068b9e7bfb2770635062fc9c2035be2142bd8Kenny Root 1656fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root return mKeyStore->put(filename.string(), &keyBlob, targetUid); 1657a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1658a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1659494689083467ec372a58f094f041c8f102f39393Kenny Root int32_t del(const String16& name, int targetUid) { 1660d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 1661eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 1662eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_DELETE, spid)) { 1663d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: del", callingUid); 166407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 166507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 166607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 1667494689083467ec372a58f094f041c8f102f39393Kenny Root if (targetUid == -1) { 1668494689083467ec372a58f094f041c8f102f39393Kenny Root targetUid = callingUid; 1669494689083467ec372a58f094f041c8f102f39393Kenny Root } else if (!is_granted_to(callingUid, targetUid)) { 1670b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root return ::PERMISSION_DENIED; 1671b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root } 1672b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root 167307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 1674655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid)); 16754b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return mKeyStore->del(filename.string(), ::TYPE_GENERIC, targetUid); 1676298e7b1b0f9116e2054d594d7538379d86585035Kenny Root } 1677298e7b1b0f9116e2054d594d7538379d86585035Kenny Root 1678494689083467ec372a58f094f041c8f102f39393Kenny Root int32_t exist(const String16& name, int targetUid) { 1679d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 1680eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 1681eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_EXIST, spid)) { 1682d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: exist", callingUid); 168307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 168407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 168507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 1686494689083467ec372a58f094f041c8f102f39393Kenny Root if (targetUid == -1) { 1687494689083467ec372a58f094f041c8f102f39393Kenny Root targetUid = callingUid; 1688494689083467ec372a58f094f041c8f102f39393Kenny Root } else if (!is_granted_to(callingUid, targetUid)) { 1689b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root return ::PERMISSION_DENIED; 1690b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root } 1691b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root 169207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 1693655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid)); 169407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 1695655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(filename.string(), R_OK) == -1) { 169607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return (errno != ENOENT) ? ::SYSTEM_ERROR : ::KEY_NOT_FOUND; 169707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 169807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 1699298e7b1b0f9116e2054d594d7538379d86585035Kenny Root } 1700298e7b1b0f9116e2054d594d7538379d86585035Kenny Root 1701494689083467ec372a58f094f041c8f102f39393Kenny Root int32_t saw(const String16& prefix, int targetUid, Vector<String16>* matches) { 1702d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 1703eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 1704eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_SAW, spid)) { 1705d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: saw", callingUid); 170607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 170707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 170807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 1709494689083467ec372a58f094f041c8f102f39393Kenny Root if (targetUid == -1) { 1710494689083467ec372a58f094f041c8f102f39393Kenny Root targetUid = callingUid; 1711494689083467ec372a58f094f041c8f102f39393Kenny Root } else if (!is_granted_to(callingUid, targetUid)) { 1712b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root return ::PERMISSION_DENIED; 1713b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root } 1714b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root 171507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const String8 prefix8(prefix); 1716655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUid(prefix8, targetUid)); 171707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 17184b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (mKeyStore->saw(filename, matches, targetUid) != ::NO_ERROR) { 17194b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return ::SYSTEM_ERROR; 172007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 172107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 1722298e7b1b0f9116e2054d594d7538379d86585035Kenny Root } 1723298e7b1b0f9116e2054d594d7538379d86585035Kenny Root 172407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t reset() { 1725d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 1726eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 1727eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_RESET, spid)) { 1728d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: reset", callingUid); 172907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 173007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1731a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 17324b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return mKeyStore->reset(callingUid) ? ::NO_ERROR : ::SYSTEM_ERROR; 1733a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 1734a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 173507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root /* 173607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * Here is the history. To improve the security, the parameters to generate the 173707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * master key has been changed. To make a seamless transition, we update the 173807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * file using the same password when the user unlock it for the first time. If 173907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * any thing goes wrong during the transition, the new file will not overwrite 174007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * the old one. This avoids permanent damages of the existing data. 174107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root */ 174207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t password(const String16& password) { 1743d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 1744eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 1745eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_PASSWORD, spid)) { 1746d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: password", callingUid); 174707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 174807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1749a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 175007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const String8 password8(password); 1751a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 1752655b958eb2180c7c06889f83f606d23421bf038cKenny Root switch (mKeyStore->getState(callingUid)) { 175307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root case ::STATE_UNINITIALIZED: { 175407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root // generate master key, encrypt with password, write to file, initialize mMasterKey*. 1755655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mKeyStore->initializeUser(password8, callingUid); 175607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 175707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root case ::STATE_NO_ERROR: { 175807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root // rewrite master key with new password. 1759655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mKeyStore->writeMasterKey(password8, callingUid); 176007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 176107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root case ::STATE_LOCKED: { 176207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root // read master key, decrypt with password, initialize mMasterKey*. 1763655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mKeyStore->readMasterKey(password8, callingUid); 176407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 176507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 176607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::SYSTEM_ERROR; 176707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 1768a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 176907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t lock() { 1770d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 1771eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 1772eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_LOCK, spid)) { 1773d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: lock", callingUid); 177407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 177507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 177607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 1777655b958eb2180c7c06889f83f606d23421bf038cKenny Root State state = mKeyStore->getState(callingUid); 17789d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root if (state != ::STATE_NO_ERROR) { 177907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ALOGD("calling lock in state: %d", state); 178007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return state; 178107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 178270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1783655b958eb2180c7c06889f83f606d23421bf038cKenny Root mKeyStore->lock(callingUid); 178407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 178570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 1786a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 178707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t unlock(const String16& pw) { 1788d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 1789eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 1790eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_UNLOCK, spid)) { 1791d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: unlock", callingUid); 179207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 179307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 179407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 1795655b958eb2180c7c06889f83f606d23421bf038cKenny Root State state = mKeyStore->getState(callingUid); 17969d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root if (state != ::STATE_LOCKED) { 179707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ALOGD("calling unlock when not locked"); 179807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return state; 179907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 180007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 180107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const String8 password8(pw); 180207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return password(pw); 180370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 180470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 180507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t zero() { 1806d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 1807eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 1808eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_ZERO, spid)) { 1809d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: zero", callingUid); 181007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return -1; 181107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 181270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1813655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mKeyStore->isEmpty(callingUid) ? ::KEY_NOT_FOUND : ::NO_ERROR; 181470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 181570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 181696427baf0094d50047049d329b0779c3c910402cKenny Root int32_t generate(const String16& name, int32_t targetUid, int32_t keyType, int32_t keySize, 181796427baf0094d50047049d329b0779c3c910402cKenny Root int32_t flags, Vector<sp<KeystoreArg> >* args) { 1818d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 1819eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 1820eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_INSERT, spid)) { 1821d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: generate", callingUid); 182207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 182307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 182470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1825494689083467ec372a58f094f041c8f102f39393Kenny Root if (targetUid == -1) { 1826494689083467ec372a58f094f041c8f102f39393Kenny Root targetUid = callingUid; 1827494689083467ec372a58f094f041c8f102f39393Kenny Root } else if (!is_granted_to(callingUid, targetUid)) { 1828b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root return ::PERMISSION_DENIED; 1829b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root } 1830b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root 1831655b958eb2180c7c06889f83f606d23421bf038cKenny Root State state = mKeyStore->getState(callingUid); 1832f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if ((flags & KEYSTORE_FLAG_ENCRYPTED) && !isKeystoreUnlocked(state)) { 1833f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root ALOGW("calling generate in state: %d", state); 183407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return state; 183507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 183670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 183707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root uint8_t* data; 183807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root size_t dataLength; 183907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int rc; 184017208e0de5a42722901d803118745cca25fd10c1Kenny Root bool isFallback = false; 184170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 184207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const keymaster_device_t* device = mKeyStore->getDevice(); 184307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (device == NULL) { 184407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::SYSTEM_ERROR; 184507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 184670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 184707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (device->generate_keypair == NULL) { 184807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::SYSTEM_ERROR; 184907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 185070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 185117208e0de5a42722901d803118745cca25fd10c1Kenny Root if (keyType == EVP_PKEY_DSA) { 185296427baf0094d50047049d329b0779c3c910402cKenny Root keymaster_dsa_keygen_params_t dsa_params; 185396427baf0094d50047049d329b0779c3c910402cKenny Root memset(&dsa_params, '\0', sizeof(dsa_params)); 185496427baf0094d50047049d329b0779c3c910402cKenny Root 185596427baf0094d50047049d329b0779c3c910402cKenny Root if (keySize == -1) { 185696427baf0094d50047049d329b0779c3c910402cKenny Root keySize = DSA_DEFAULT_KEY_SIZE; 185796427baf0094d50047049d329b0779c3c910402cKenny Root } else if ((keySize % 64) != 0 || keySize < DSA_MIN_KEY_SIZE 185896427baf0094d50047049d329b0779c3c910402cKenny Root || keySize > DSA_MAX_KEY_SIZE) { 185996427baf0094d50047049d329b0779c3c910402cKenny Root ALOGI("invalid key size %d", keySize); 186096427baf0094d50047049d329b0779c3c910402cKenny Root return ::SYSTEM_ERROR; 186196427baf0094d50047049d329b0779c3c910402cKenny Root } 186296427baf0094d50047049d329b0779c3c910402cKenny Root dsa_params.key_size = keySize; 186396427baf0094d50047049d329b0779c3c910402cKenny Root 186496427baf0094d50047049d329b0779c3c910402cKenny Root if (args->size() == 3) { 186596427baf0094d50047049d329b0779c3c910402cKenny Root sp<KeystoreArg> gArg = args->itemAt(0); 186696427baf0094d50047049d329b0779c3c910402cKenny Root sp<KeystoreArg> pArg = args->itemAt(1); 186796427baf0094d50047049d329b0779c3c910402cKenny Root sp<KeystoreArg> qArg = args->itemAt(2); 186896427baf0094d50047049d329b0779c3c910402cKenny Root 186996427baf0094d50047049d329b0779c3c910402cKenny Root if (gArg != NULL && pArg != NULL && qArg != NULL) { 187096427baf0094d50047049d329b0779c3c910402cKenny Root dsa_params.generator = reinterpret_cast<const uint8_t*>(gArg->data()); 187196427baf0094d50047049d329b0779c3c910402cKenny Root dsa_params.generator_len = gArg->size(); 187296427baf0094d50047049d329b0779c3c910402cKenny Root 187396427baf0094d50047049d329b0779c3c910402cKenny Root dsa_params.prime_p = reinterpret_cast<const uint8_t*>(pArg->data()); 187496427baf0094d50047049d329b0779c3c910402cKenny Root dsa_params.prime_p_len = pArg->size(); 187596427baf0094d50047049d329b0779c3c910402cKenny Root 187696427baf0094d50047049d329b0779c3c910402cKenny Root dsa_params.prime_q = reinterpret_cast<const uint8_t*>(qArg->data()); 187796427baf0094d50047049d329b0779c3c910402cKenny Root dsa_params.prime_q_len = qArg->size(); 187896427baf0094d50047049d329b0779c3c910402cKenny Root } else { 187996427baf0094d50047049d329b0779c3c910402cKenny Root ALOGI("not all DSA parameters were read"); 188096427baf0094d50047049d329b0779c3c910402cKenny Root return ::SYSTEM_ERROR; 188196427baf0094d50047049d329b0779c3c910402cKenny Root } 188296427baf0094d50047049d329b0779c3c910402cKenny Root } else if (args->size() != 0) { 188396427baf0094d50047049d329b0779c3c910402cKenny Root ALOGI("DSA args must be 3"); 188496427baf0094d50047049d329b0779c3c910402cKenny Root return ::SYSTEM_ERROR; 188596427baf0094d50047049d329b0779c3c910402cKenny Root } 188696427baf0094d50047049d329b0779c3c910402cKenny Root 18871d448c074a86ef5d05a22fdf1358718976628a86Kenny Root if (isKeyTypeSupported(device, TYPE_DSA)) { 188817208e0de5a42722901d803118745cca25fd10c1Kenny Root rc = device->generate_keypair(device, TYPE_DSA, &dsa_params, &data, &dataLength); 188917208e0de5a42722901d803118745cca25fd10c1Kenny Root } else { 189017208e0de5a42722901d803118745cca25fd10c1Kenny Root isFallback = true; 189117208e0de5a42722901d803118745cca25fd10c1Kenny Root rc = openssl_generate_keypair(device, TYPE_DSA, &dsa_params, &data, &dataLength); 189217208e0de5a42722901d803118745cca25fd10c1Kenny Root } 189317208e0de5a42722901d803118745cca25fd10c1Kenny Root } else if (keyType == EVP_PKEY_EC) { 189496427baf0094d50047049d329b0779c3c910402cKenny Root keymaster_ec_keygen_params_t ec_params; 189596427baf0094d50047049d329b0779c3c910402cKenny Root memset(&ec_params, '\0', sizeof(ec_params)); 189696427baf0094d50047049d329b0779c3c910402cKenny Root 189796427baf0094d50047049d329b0779c3c910402cKenny Root if (keySize == -1) { 189896427baf0094d50047049d329b0779c3c910402cKenny Root keySize = EC_DEFAULT_KEY_SIZE; 189996427baf0094d50047049d329b0779c3c910402cKenny Root } else if (keySize < EC_MIN_KEY_SIZE || keySize > EC_MAX_KEY_SIZE) { 190096427baf0094d50047049d329b0779c3c910402cKenny Root ALOGI("invalid key size %d", keySize); 190196427baf0094d50047049d329b0779c3c910402cKenny Root return ::SYSTEM_ERROR; 190296427baf0094d50047049d329b0779c3c910402cKenny Root } 190396427baf0094d50047049d329b0779c3c910402cKenny Root ec_params.field_size = keySize; 190496427baf0094d50047049d329b0779c3c910402cKenny Root 19051d448c074a86ef5d05a22fdf1358718976628a86Kenny Root if (isKeyTypeSupported(device, TYPE_EC)) { 190617208e0de5a42722901d803118745cca25fd10c1Kenny Root rc = device->generate_keypair(device, TYPE_EC, &ec_params, &data, &dataLength); 190717208e0de5a42722901d803118745cca25fd10c1Kenny Root } else { 190817208e0de5a42722901d803118745cca25fd10c1Kenny Root isFallback = true; 190917208e0de5a42722901d803118745cca25fd10c1Kenny Root rc = openssl_generate_keypair(device, TYPE_EC, &ec_params, &data, &dataLength); 191017208e0de5a42722901d803118745cca25fd10c1Kenny Root } 191196427baf0094d50047049d329b0779c3c910402cKenny Root } else if (keyType == EVP_PKEY_RSA) { 191296427baf0094d50047049d329b0779c3c910402cKenny Root keymaster_rsa_keygen_params_t rsa_params; 191396427baf0094d50047049d329b0779c3c910402cKenny Root memset(&rsa_params, '\0', sizeof(rsa_params)); 191496427baf0094d50047049d329b0779c3c910402cKenny Root rsa_params.public_exponent = RSA_DEFAULT_EXPONENT; 191596427baf0094d50047049d329b0779c3c910402cKenny Root 191696427baf0094d50047049d329b0779c3c910402cKenny Root if (keySize == -1) { 191796427baf0094d50047049d329b0779c3c910402cKenny Root keySize = RSA_DEFAULT_KEY_SIZE; 191896427baf0094d50047049d329b0779c3c910402cKenny Root } else if (keySize < RSA_MIN_KEY_SIZE || keySize > RSA_MAX_KEY_SIZE) { 191996427baf0094d50047049d329b0779c3c910402cKenny Root ALOGI("invalid key size %d", keySize); 192096427baf0094d50047049d329b0779c3c910402cKenny Root return ::SYSTEM_ERROR; 192196427baf0094d50047049d329b0779c3c910402cKenny Root } 192296427baf0094d50047049d329b0779c3c910402cKenny Root rsa_params.modulus_size = keySize; 192396427baf0094d50047049d329b0779c3c910402cKenny Root 192496427baf0094d50047049d329b0779c3c910402cKenny Root if (args->size() > 1) { 19256489e02e134e4779d35c4a340ff68ad445fde133Matteo Franchin ALOGI("invalid number of arguments: %zu", args->size()); 192696427baf0094d50047049d329b0779c3c910402cKenny Root return ::SYSTEM_ERROR; 192796427baf0094d50047049d329b0779c3c910402cKenny Root } else if (args->size() == 1) { 192896427baf0094d50047049d329b0779c3c910402cKenny Root sp<KeystoreArg> pubExpBlob = args->itemAt(0); 192996427baf0094d50047049d329b0779c3c910402cKenny Root if (pubExpBlob != NULL) { 193096427baf0094d50047049d329b0779c3c910402cKenny Root Unique_BIGNUM pubExpBn( 193196427baf0094d50047049d329b0779c3c910402cKenny Root BN_bin2bn(reinterpret_cast<const unsigned char*>(pubExpBlob->data()), 193296427baf0094d50047049d329b0779c3c910402cKenny Root pubExpBlob->size(), NULL)); 193396427baf0094d50047049d329b0779c3c910402cKenny Root if (pubExpBn.get() == NULL) { 193496427baf0094d50047049d329b0779c3c910402cKenny Root ALOGI("Could not convert public exponent to BN"); 193596427baf0094d50047049d329b0779c3c910402cKenny Root return ::SYSTEM_ERROR; 193696427baf0094d50047049d329b0779c3c910402cKenny Root } 193796427baf0094d50047049d329b0779c3c910402cKenny Root unsigned long pubExp = BN_get_word(pubExpBn.get()); 193896427baf0094d50047049d329b0779c3c910402cKenny Root if (pubExp == 0xFFFFFFFFL) { 193996427baf0094d50047049d329b0779c3c910402cKenny Root ALOGI("cannot represent public exponent as a long value"); 194096427baf0094d50047049d329b0779c3c910402cKenny Root return ::SYSTEM_ERROR; 194196427baf0094d50047049d329b0779c3c910402cKenny Root } 194296427baf0094d50047049d329b0779c3c910402cKenny Root rsa_params.public_exponent = pubExp; 194396427baf0094d50047049d329b0779c3c910402cKenny Root } 194496427baf0094d50047049d329b0779c3c910402cKenny Root } 194596427baf0094d50047049d329b0779c3c910402cKenny Root 194696427baf0094d50047049d329b0779c3c910402cKenny Root rc = device->generate_keypair(device, TYPE_RSA, &rsa_params, &data, &dataLength); 194796427baf0094d50047049d329b0779c3c910402cKenny Root } else { 194896427baf0094d50047049d329b0779c3c910402cKenny Root ALOGW("Unsupported key type %d", keyType); 194996427baf0094d50047049d329b0779c3c910402cKenny Root rc = -1; 195096427baf0094d50047049d329b0779c3c910402cKenny Root } 195170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 195207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (rc) { 195307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::SYSTEM_ERROR; 195407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 195570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1956655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 name8(name); 1957655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, callingUid)); 195870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 195907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root Blob keyBlob(data, dataLength, NULL, 0, TYPE_KEY_PAIR); 196007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root free(data); 196107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 1962ee8068b9e7bfb2770635062fc9c2035be2142bd8Kenny Root keyBlob.setEncrypted(flags & KEYSTORE_FLAG_ENCRYPTED); 196317208e0de5a42722901d803118745cca25fd10c1Kenny Root keyBlob.setFallback(isFallback); 196417208e0de5a42722901d803118745cca25fd10c1Kenny Root 1965655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mKeyStore->put(filename.string(), &keyBlob, callingUid); 196670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 196770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1968f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root int32_t import(const String16& name, const uint8_t* data, size_t length, int targetUid, 1969f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root int32_t flags) { 1970d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 1971eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 1972eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_INSERT, spid)) { 1973d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: import", callingUid); 197407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 197507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 197670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1977494689083467ec372a58f094f041c8f102f39393Kenny Root if (targetUid == -1) { 1978494689083467ec372a58f094f041c8f102f39393Kenny Root targetUid = callingUid; 1979494689083467ec372a58f094f041c8f102f39393Kenny Root } else if (!is_granted_to(callingUid, targetUid)) { 1980b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root return ::PERMISSION_DENIED; 1981b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root } 1982b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root 1983fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root State state = mKeyStore->getState(targetUid); 1984f9119d6414f43ef669d64e9e53feb043eda49cf3Kenny Root if ((flags & KEYSTORE_FLAG_ENCRYPTED) && !isKeystoreUnlocked(state)) { 198507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ALOGD("calling import in state: %d", state); 198607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return state; 198707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 198870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 198907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 199060898896c3f3b2245d10076cac64346c956dbaa5Kenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid)); 199170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 1992fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root return mKeyStore->importKey(data, length, filename.string(), targetUid, flags); 199370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 199470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 199507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t sign(const String16& name, const uint8_t* data, size_t length, uint8_t** out, 199607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root size_t* outLength) { 1997d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 1998eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 1999eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_SIGN, spid)) { 2000d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: saw", callingUid); 200107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 200207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 20039a53d3eaf42104ddf02feeccec3cf7f5c1a34baeKenny Root 200407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root Blob keyBlob; 200507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 200670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 2007d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGV("sign %s from uid %d", name8.string(), callingUid); 200807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int rc; 200970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 2010655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode responseCode = mKeyStore->getKeyForName(&keyBlob, name8, callingUid, 2011d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ::TYPE_KEY_PAIR); 201207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (responseCode != ::NO_ERROR) { 201307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return responseCode; 201407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 201570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 201607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const keymaster_device_t* device = mKeyStore->getDevice(); 201707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (device == NULL) { 201807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ALOGE("no keymaster device; cannot sign"); 201907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::SYSTEM_ERROR; 202007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 202170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 202207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (device->sign_data == NULL) { 202307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ALOGE("device doesn't implement signing"); 202407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::SYSTEM_ERROR; 202507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 202670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 202707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root keymaster_rsa_sign_params_t params; 202807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root params.digest_type = DIGEST_NONE; 202907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root params.padding_type = PADDING_NONE; 203007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 203117208e0de5a42722901d803118745cca25fd10c1Kenny Root if (keyBlob.isFallback()) { 203217208e0de5a42722901d803118745cca25fd10c1Kenny Root rc = openssl_sign_data(device, ¶ms, keyBlob.getValue(), keyBlob.getLength(), data, 203317208e0de5a42722901d803118745cca25fd10c1Kenny Root length, out, outLength); 203417208e0de5a42722901d803118745cca25fd10c1Kenny Root } else { 203517208e0de5a42722901d803118745cca25fd10c1Kenny Root rc = device->sign_data(device, ¶ms, keyBlob.getValue(), keyBlob.getLength(), data, 203617208e0de5a42722901d803118745cca25fd10c1Kenny Root length, out, outLength); 203717208e0de5a42722901d803118745cca25fd10c1Kenny Root } 203807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (rc) { 203907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ALOGW("device couldn't sign data"); 204007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::SYSTEM_ERROR; 204107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 204270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 204307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 204470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 204570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 204607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t verify(const String16& name, const uint8_t* data, size_t dataLength, 204707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const uint8_t* signature, size_t signatureLength) { 2048d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 2049eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 2050eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_VERIFY, spid)) { 2051d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: verify", callingUid); 205207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 205307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 205470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 2055655b958eb2180c7c06889f83f606d23421bf038cKenny Root State state = mKeyStore->getState(callingUid); 20569d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root if (!isKeystoreUnlocked(state)) { 205707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ALOGD("calling verify in state: %d", state); 205807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return state; 205907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 206070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 206107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root Blob keyBlob; 206207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 206307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int rc; 206470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 2065655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode responseCode = mKeyStore->getKeyForName(&keyBlob, name8, callingUid, 2066494689083467ec372a58f094f041c8f102f39393Kenny Root TYPE_KEY_PAIR); 206707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (responseCode != ::NO_ERROR) { 206807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return responseCode; 206907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 207070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 207107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const keymaster_device_t* device = mKeyStore->getDevice(); 207207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (device == NULL) { 207307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::SYSTEM_ERROR; 207407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 207570e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 207607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (device->verify_data == NULL) { 207707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::SYSTEM_ERROR; 207807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 207907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 208007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root keymaster_rsa_sign_params_t params; 208107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root params.digest_type = DIGEST_NONE; 208207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root params.padding_type = PADDING_NONE; 208370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 208417208e0de5a42722901d803118745cca25fd10c1Kenny Root if (keyBlob.isFallback()) { 208517208e0de5a42722901d803118745cca25fd10c1Kenny Root rc = openssl_verify_data(device, ¶ms, keyBlob.getValue(), keyBlob.getLength(), data, 208617208e0de5a42722901d803118745cca25fd10c1Kenny Root dataLength, signature, signatureLength); 208717208e0de5a42722901d803118745cca25fd10c1Kenny Root } else { 208817208e0de5a42722901d803118745cca25fd10c1Kenny Root rc = device->verify_data(device, ¶ms, keyBlob.getValue(), keyBlob.getLength(), data, 208917208e0de5a42722901d803118745cca25fd10c1Kenny Root dataLength, signature, signatureLength); 209017208e0de5a42722901d803118745cca25fd10c1Kenny Root } 209107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (rc) { 209207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::SYSTEM_ERROR; 209307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } else { 209407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 209507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 209670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 209770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 209807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root /* 209907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * TODO: The abstraction between things stored in hardware and regular blobs 210007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * of data stored on the filesystem should be moved down to keystore itself. 210107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * Unfortunately the Java code that calls this has naming conventions that it 210207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * knows about. Ideally keystore shouldn't be used to store random blobs of 210307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * data. 210407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * 210507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * Until that happens, it's necessary to have a separate "get_pubkey" and 210607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * "del_key" since the Java code doesn't really communicate what it's 210707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * intentions are. 210807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root */ 210907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t get_pubkey(const String16& name, uint8_t** pubkey, size_t* pubkeyLength) { 2110d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 2111eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 2112eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_GET, spid)) { 2113d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: get_pubkey", callingUid); 211407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 211507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 211670e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 211707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root Blob keyBlob; 211807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 211970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 2120d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGV("get_pubkey '%s' from uid %d", name8.string(), callingUid); 212170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 2122655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode responseCode = mKeyStore->getKeyForName(&keyBlob, name8, callingUid, 212307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root TYPE_KEY_PAIR); 212407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (responseCode != ::NO_ERROR) { 212507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return responseCode; 212607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 212770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 212807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root const keymaster_device_t* device = mKeyStore->getDevice(); 212907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (device == NULL) { 213007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::SYSTEM_ERROR; 213107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 213270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 213307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (device->get_keypair_public == NULL) { 213407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ALOGE("device has no get_keypair_public implementation!"); 213507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::SYSTEM_ERROR; 213607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 2137344e0bc23ca46b9acec97ac8bcd87949bde0ccabKenny Root 213817208e0de5a42722901d803118745cca25fd10c1Kenny Root int rc; 213917208e0de5a42722901d803118745cca25fd10c1Kenny Root if (keyBlob.isFallback()) { 214017208e0de5a42722901d803118745cca25fd10c1Kenny Root rc = openssl_get_keypair_public(device, keyBlob.getValue(), keyBlob.getLength(), pubkey, 214117208e0de5a42722901d803118745cca25fd10c1Kenny Root pubkeyLength); 214217208e0de5a42722901d803118745cca25fd10c1Kenny Root } else { 214317208e0de5a42722901d803118745cca25fd10c1Kenny Root rc = device->get_keypair_public(device, keyBlob.getValue(), keyBlob.getLength(), pubkey, 214417208e0de5a42722901d803118745cca25fd10c1Kenny Root pubkeyLength); 214517208e0de5a42722901d803118745cca25fd10c1Kenny Root } 214607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (rc) { 214707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::SYSTEM_ERROR; 214807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 2149344e0bc23ca46b9acec97ac8bcd87949bde0ccabKenny Root 215007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 2151344e0bc23ca46b9acec97ac8bcd87949bde0ccabKenny Root } 2152344e0bc23ca46b9acec97ac8bcd87949bde0ccabKenny Root 2153494689083467ec372a58f094f041c8f102f39393Kenny Root int32_t del_key(const String16& name, int targetUid) { 2154d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 2155eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 2156eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_DELETE, spid)) { 2157d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: del_key", callingUid); 215807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 215907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 2160344e0bc23ca46b9acec97ac8bcd87949bde0ccabKenny Root 2161494689083467ec372a58f094f041c8f102f39393Kenny Root if (targetUid == -1) { 2162494689083467ec372a58f094f041c8f102f39393Kenny Root targetUid = callingUid; 2163494689083467ec372a58f094f041c8f102f39393Kenny Root } else if (!is_granted_to(callingUid, targetUid)) { 2164b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root return ::PERMISSION_DENIED; 2165b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root } 2166b88c3eb96625513df4cc998d739d17266ebaf89fKenny Root 216707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 2168fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid)); 21694b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return mKeyStore->del(filename.string(), ::TYPE_KEY_PAIR, targetUid); 2170a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 217107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 217207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t grant(const String16& name, int32_t granteeUid) { 2173d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 2174eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 2175eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_GRANT, spid)) { 2176d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: grant", callingUid); 217707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 217807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 217907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2180655b958eb2180c7c06889f83f606d23421bf038cKenny Root State state = mKeyStore->getState(callingUid); 21819d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root if (!isKeystoreUnlocked(state)) { 218207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ALOGD("calling grant in state: %d", state); 218307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return state; 218407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 218507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 218607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 2187655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, callingUid)); 218807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2189655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(filename.string(), R_OK) == -1) { 219007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return (errno != ENOENT) ? ::SYSTEM_ERROR : ::KEY_NOT_FOUND; 219107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 219207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2193655b958eb2180c7c06889f83f606d23421bf038cKenny Root mKeyStore->addGrant(filename.string(), granteeUid); 219407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::NO_ERROR; 2195a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 219607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 219707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int32_t ungrant(const String16& name, int32_t granteeUid) { 2198d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 2199eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 2200eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_GRANT, spid)) { 2201d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: ungrant", callingUid); 220207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return ::PERMISSION_DENIED; 220307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 220407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2205655b958eb2180c7c06889f83f606d23421bf038cKenny Root State state = mKeyStore->getState(callingUid); 22069d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root if (!isKeystoreUnlocked(state)) { 220707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ALOGD("calling ungrant in state: %d", state); 220807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return state; 220907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 221007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 221107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 2212655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, callingUid)); 221307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2214655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(filename.string(), R_OK) == -1) { 221507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return (errno != ENOENT) ? ::SYSTEM_ERROR : ::KEY_NOT_FOUND; 221607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 221707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2218655b958eb2180c7c06889f83f606d23421bf038cKenny Root return mKeyStore->removeGrant(filename.string(), granteeUid) ? ::NO_ERROR : ::KEY_NOT_FOUND; 2219a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 222007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 222107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int64_t getmtime(const String16& name) { 2222d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 2223eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 2224eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_GET, spid)) { 2225d38a0b07a3104fcb1e747a0fa06641dee8fc058fKenny Root ALOGW("permission denied for %d: getmtime", callingUid); 222636a9e231e03734cd2143383d26388455c1764e17Kenny Root return -1L; 222707438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 222807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 222907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root String8 name8(name); 2230655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, callingUid)); 223107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2232655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(filename.string(), R_OK) == -1) { 2233655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("could not access %s for getmtime", filename.string()); 223436a9e231e03734cd2143383d26388455c1764e17Kenny Root return -1L; 2235a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 223607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2237655b958eb2180c7c06889f83f606d23421bf038cKenny Root int fd = TEMP_FAILURE_RETRY(open(filename.string(), O_NOFOLLOW, O_RDONLY)); 223807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (fd < 0) { 2239655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("could not open %s for getmtime", filename.string()); 224036a9e231e03734cd2143383d26388455c1764e17Kenny Root return -1L; 224107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 224207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 224307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root struct stat s; 224407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root int ret = fstat(fd, &s); 224507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root close(fd); 224607438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (ret == -1) { 2247655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("could not stat %s for getmtime", filename.string()); 224836a9e231e03734cd2143383d26388455c1764e17Kenny Root return -1L; 224907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root } 225007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 225136a9e231e03734cd2143383d26388455c1764e17Kenny Root return static_cast<int64_t>(s.st_mtime); 2252a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 225307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 2254d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root int32_t duplicate(const String16& srcKey, int32_t srcUid, const String16& destKey, 2255d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root int32_t destUid) { 22560225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 2257eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 2258eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_DUPLICATE, spid)) { 2259d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root ALOGW("permission denied for %d: duplicate", callingUid); 22600225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root return -1L; 22610225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 22620225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2263655b958eb2180c7c06889f83f606d23421bf038cKenny Root State state = mKeyStore->getState(callingUid); 22640225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root if (!isKeystoreUnlocked(state)) { 2265d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root ALOGD("calling duplicate in state: %d", state); 22660225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root return state; 22670225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 22680225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2269d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (srcUid == -1 || static_cast<uid_t>(srcUid) == callingUid) { 2270d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root srcUid = callingUid; 2271d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root } else if (!is_granted_to(callingUid, srcUid)) { 2272d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root ALOGD("migrate not granted from source: %d -> %d", callingUid, srcUid); 22730225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root return ::PERMISSION_DENIED; 22740225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 22750225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2276d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (destUid == -1) { 2277d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root destUid = callingUid; 2278d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root } 22790225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2280d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (srcUid != destUid) { 2281d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (static_cast<uid_t>(srcUid) != callingUid) { 2282d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root ALOGD("can only duplicate from caller to other or to same uid: " 2283d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root "calling=%d, srcUid=%d, destUid=%d", callingUid, srcUid, destUid); 2284d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root return ::PERMISSION_DENIED; 2285d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root } 22860225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2287d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (!is_granted_to(callingUid, destUid)) { 2288d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root ALOGD("duplicate not granted to dest: %d -> %d", callingUid, destUid); 2289d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root return ::PERMISSION_DENIED; 2290d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root } 22910225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 22920225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2293d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root String8 source8(srcKey); 2294655b958eb2180c7c06889f83f606d23421bf038cKenny Root String8 sourceFile(mKeyStore->getKeyNameForUidWithDir(source8, srcUid)); 2295d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root 2296d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root String8 target8(destKey); 2297fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root String8 targetFile(mKeyStore->getKeyNameForUidWithDir(target8, destUid)); 22980225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2299655b958eb2180c7c06889f83f606d23421bf038cKenny Root if (access(targetFile.string(), W_OK) != -1 || errno != ENOENT) { 2300655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGD("destination already exists: %s", targetFile.string()); 23010225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root return ::SYSTEM_ERROR; 23020225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 23030225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 2304d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root Blob keyBlob; 2305655b958eb2180c7c06889f83f606d23421bf038cKenny Root ResponseCode responseCode = mKeyStore->get(sourceFile.string(), &keyBlob, TYPE_ANY, 2306fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root srcUid); 2307d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root if (responseCode != ::NO_ERROR) { 2308d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root return responseCode; 23090225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 2310d53bc92f1cc4eb669ec015480cebe5ae7aaaf7cfKenny Root 2311fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root return mKeyStore->put(targetFile.string(), &keyBlob, destUid); 23120225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root } 23130225407783ee339164a0cd8ca5ef04c99d27c59aKenny Root 23141b0e3933900c7ea21189704d5db64e7346aee7afKenny Root int32_t is_hardware_backed(const String16& keyType) { 23151b0e3933900c7ea21189704d5db64e7346aee7afKenny Root return mKeyStore->isHardwareBacked(keyType) ? 1 : 0; 23168ddf35a6e1fd80a7d0685041d2bfc77078277c9dKenny Root } 23178ddf35a6e1fd80a7d0685041d2bfc77078277c9dKenny Root 2318fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root int32_t clear_uid(int64_t targetUid64) { 2319fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root uid_t targetUid = static_cast<uid_t>(targetUid64); 2320a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root uid_t callingUid = IPCThreadState::self()->getCallingUid(); 2321eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn pid_t spid = IPCThreadState::self()->getCallingPid(); 2322eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (!has_permission(callingUid, P_CLEAR_UID, spid)) { 2323a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root ALOGW("permission denied for %d: clear_uid", callingUid); 2324a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root return ::PERMISSION_DENIED; 2325a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root } 2326a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root 2327fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root if (targetUid64 == -1) { 2328fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root targetUid = callingUid; 2329007cb236ada4b3d70815f03dd07116a5e187f4ddKenny Root } else if (!is_self_or_system(callingUid, targetUid)) { 2330007cb236ada4b3d70815f03dd07116a5e187f4ddKenny Root ALOGW("permission denied for %d: clear_uid %d", callingUid, targetUid); 2331fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root return ::PERMISSION_DENIED; 2332fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root } 2333fa27d5bbc366e4ecb45aee5ae08565ab3ad3dcbcKenny Root 2334a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root const keymaster_device_t* device = mKeyStore->getDevice(); 2335a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root if (device == NULL) { 2336655b958eb2180c7c06889f83f606d23421bf038cKenny Root ALOGW("can't get keymaster device"); 2337a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root return ::SYSTEM_ERROR; 2338a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root } 2339a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root 23404b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee String8 prefix = String8::format("%u_", targetUid); 23414b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee Vector<String16> aliases; 23424b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (mKeyStore->saw(prefix, &aliases, targetUid) != ::NO_ERROR) { 2343a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root return ::SYSTEM_ERROR; 2344a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root } 2345a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root 23464b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee for (uint32_t i = 0; i < aliases.size(); i++) { 23474b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee String8 name8(aliases[i]); 23484b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid)); 23494b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee mKeyStore->del(filename.string(), ::TYPE_ANY, targetUid); 2350a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root } 23514b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return ::NO_ERROR; 2352a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root } 2353a9bb549868035e05450a9b918f8d7de9deca5343Kenny Root 23544b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee int32_t reset_uid(int32_t targetUid) { 23554e865753346fc6a075966972a7a98051818859dbRobin Lee uid_t callingUid = IPCThreadState::self()->getCallingUid(); 23564e865753346fc6a075966972a7a98051818859dbRobin Lee pid_t spid = IPCThreadState::self()->getCallingPid(); 23574b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee 23584e865753346fc6a075966972a7a98051818859dbRobin Lee if (!has_permission(callingUid, P_RESET_UID, spid)) { 23594b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee ALOGW("permission denied for %d: reset_uid %d", callingUid, targetUid); 23604e865753346fc6a075966972a7a98051818859dbRobin Lee return ::PERMISSION_DENIED; 23614e865753346fc6a075966972a7a98051818859dbRobin Lee } 23624b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee if (!is_self_or_system(callingUid, targetUid)) { 23634b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee ALOGW("permission denied for %d: reset_uid %d", callingUid, targetUid); 23644e865753346fc6a075966972a7a98051818859dbRobin Lee return ::PERMISSION_DENIED; 23654e865753346fc6a075966972a7a98051818859dbRobin Lee } 23664e865753346fc6a075966972a7a98051818859dbRobin Lee 23674b84fdc21457e16b08dc2738f4744c9ca7f7cc46Robin Lee return mKeyStore->reset(targetUid) ? ::NO_ERROR : ::SYSTEM_ERROR; 23684e865753346fc6a075966972a7a98051818859dbRobin Lee } 23694e865753346fc6a075966972a7a98051818859dbRobin Lee 23704e865753346fc6a075966972a7a98051818859dbRobin Lee int32_t sync_uid(int32_t sourceUid, int32_t targetUid) { 23714e865753346fc6a075966972a7a98051818859dbRobin Lee uid_t callingUid = IPCThreadState::self()->getCallingUid(); 23724e865753346fc6a075966972a7a98051818859dbRobin Lee pid_t spid = IPCThreadState::self()->getCallingPid(); 23734e865753346fc6a075966972a7a98051818859dbRobin Lee if (!has_permission(callingUid, P_SYNC_UID, spid)) { 23744e865753346fc6a075966972a7a98051818859dbRobin Lee ALOGW("permission denied for %d: sync_uid %d -> %d", callingUid, sourceUid, targetUid); 23754e865753346fc6a075966972a7a98051818859dbRobin Lee return ::PERMISSION_DENIED; 23764e865753346fc6a075966972a7a98051818859dbRobin Lee } 23774e865753346fc6a075966972a7a98051818859dbRobin Lee if (callingUid != AID_SYSTEM) { 23784e865753346fc6a075966972a7a98051818859dbRobin Lee ALOGW("permission denied for %d: sync_uid %d -> %d", callingUid, sourceUid, targetUid); 23794e865753346fc6a075966972a7a98051818859dbRobin Lee return ::PERMISSION_DENIED; 23804e865753346fc6a075966972a7a98051818859dbRobin Lee } 23814e865753346fc6a075966972a7a98051818859dbRobin Lee if (sourceUid == targetUid) { 23824e865753346fc6a075966972a7a98051818859dbRobin Lee return ::SYSTEM_ERROR; 23834e865753346fc6a075966972a7a98051818859dbRobin Lee } 23844e865753346fc6a075966972a7a98051818859dbRobin Lee 23854e865753346fc6a075966972a7a98051818859dbRobin Lee // Initialise user keystore with existing master key held in-memory 23864e865753346fc6a075966972a7a98051818859dbRobin Lee return mKeyStore->copyMasterKey(sourceUid, targetUid); 23874e865753346fc6a075966972a7a98051818859dbRobin Lee } 23884e865753346fc6a075966972a7a98051818859dbRobin Lee 23894e865753346fc6a075966972a7a98051818859dbRobin Lee int32_t password_uid(const String16& pw, int32_t targetUid) { 23904e865753346fc6a075966972a7a98051818859dbRobin Lee uid_t callingUid = IPCThreadState::self()->getCallingUid(); 23914e865753346fc6a075966972a7a98051818859dbRobin Lee pid_t spid = IPCThreadState::self()->getCallingPid(); 23924e865753346fc6a075966972a7a98051818859dbRobin Lee if (!has_permission(callingUid, P_PASSWORD_UID, spid)) { 23934e865753346fc6a075966972a7a98051818859dbRobin Lee ALOGW("permission denied for %d: password_uid %d", callingUid, targetUid); 23944e865753346fc6a075966972a7a98051818859dbRobin Lee return ::PERMISSION_DENIED; 23954e865753346fc6a075966972a7a98051818859dbRobin Lee } 23964e865753346fc6a075966972a7a98051818859dbRobin Lee if (callingUid != AID_SYSTEM) { 23974e865753346fc6a075966972a7a98051818859dbRobin Lee ALOGW("permission denied for %d: password_uid %d", callingUid, targetUid); 23984e865753346fc6a075966972a7a98051818859dbRobin Lee return ::PERMISSION_DENIED; 23994e865753346fc6a075966972a7a98051818859dbRobin Lee } 24004e865753346fc6a075966972a7a98051818859dbRobin Lee 24014e865753346fc6a075966972a7a98051818859dbRobin Lee const String8 password8(pw); 24024e865753346fc6a075966972a7a98051818859dbRobin Lee 24034e865753346fc6a075966972a7a98051818859dbRobin Lee switch (mKeyStore->getState(targetUid)) { 24044e865753346fc6a075966972a7a98051818859dbRobin Lee case ::STATE_UNINITIALIZED: { 24054e865753346fc6a075966972a7a98051818859dbRobin Lee // generate master key, encrypt with password, write to file, initialize mMasterKey*. 24064e865753346fc6a075966972a7a98051818859dbRobin Lee return mKeyStore->initializeUser(password8, targetUid); 24074e865753346fc6a075966972a7a98051818859dbRobin Lee } 24084e865753346fc6a075966972a7a98051818859dbRobin Lee case ::STATE_NO_ERROR: { 24094e865753346fc6a075966972a7a98051818859dbRobin Lee // rewrite master key with new password. 24104e865753346fc6a075966972a7a98051818859dbRobin Lee return mKeyStore->writeMasterKey(password8, targetUid); 24114e865753346fc6a075966972a7a98051818859dbRobin Lee } 24124e865753346fc6a075966972a7a98051818859dbRobin Lee case ::STATE_LOCKED: { 24134e865753346fc6a075966972a7a98051818859dbRobin Lee // read master key, decrypt with password, initialize mMasterKey*. 24144e865753346fc6a075966972a7a98051818859dbRobin Lee return mKeyStore->readMasterKey(password8, targetUid); 24154e865753346fc6a075966972a7a98051818859dbRobin Lee } 24164e865753346fc6a075966972a7a98051818859dbRobin Lee } 24174e865753346fc6a075966972a7a98051818859dbRobin Lee return ::SYSTEM_ERROR; 24184e865753346fc6a075966972a7a98051818859dbRobin Lee } 24194e865753346fc6a075966972a7a98051818859dbRobin Lee 242007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Rootprivate: 24219d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root inline bool isKeystoreUnlocked(State state) { 24229d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root switch (state) { 24239d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root case ::STATE_NO_ERROR: 24249d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root return true; 24259d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root case ::STATE_UNINITIALIZED: 24269d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root case ::STATE_LOCKED: 24279d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root return false; 24289d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root } 24299d45d1caba5135e6b8bd6d05d449e8dcf52b6802Kenny Root return false; 2430a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 243107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 24321d448c074a86ef5d05a22fdf1358718976628a86Kenny Root bool isKeyTypeSupported(const keymaster_device_t* device, keymaster_keypair_t keyType) { 24331d448c074a86ef5d05a22fdf1358718976628a86Kenny Root const int32_t device_api = device->common.module->module_api_version; 24341d448c074a86ef5d05a22fdf1358718976628a86Kenny Root if (device_api == KEYMASTER_MODULE_API_VERSION_0_2) { 24351d448c074a86ef5d05a22fdf1358718976628a86Kenny Root switch (keyType) { 24361d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_RSA: 24371d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_DSA: 24381d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_EC: 24391d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return true; 24401d448c074a86ef5d05a22fdf1358718976628a86Kenny Root default: 24411d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return false; 24421d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } 24431d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } else if (device_api >= KEYMASTER_MODULE_API_VERSION_0_3) { 24441d448c074a86ef5d05a22fdf1358718976628a86Kenny Root switch (keyType) { 24451d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_RSA: 24461d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return true; 24471d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_DSA: 24481d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return device->flags & KEYMASTER_SUPPORTS_DSA; 24491d448c074a86ef5d05a22fdf1358718976628a86Kenny Root case TYPE_EC: 24501d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return device->flags & KEYMASTER_SUPPORTS_EC; 24511d448c074a86ef5d05a22fdf1358718976628a86Kenny Root default: 24521d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return false; 24531d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } 24541d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } else { 24551d448c074a86ef5d05a22fdf1358718976628a86Kenny Root return keyType == TYPE_RSA; 24561d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } 24571d448c074a86ef5d05a22fdf1358718976628a86Kenny Root } 24581d448c074a86ef5d05a22fdf1358718976628a86Kenny Root 245907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ::KeyStore* mKeyStore; 246007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root}; 246107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root 246207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root}; // namespace android 2463a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 2464a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Rootint main(int argc, char* argv[]) { 2465a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (argc < 2) { 2466a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ALOGE("A directory must be specified!"); 2467a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return 1; 2468a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 2469a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (chdir(argv[1]) == -1) { 2470a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root ALOGE("chdir: %s: %s", argv[1], strerror(errno)); 2471a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return 1; 2472a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 2473a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root 2474a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root Entropy entropy; 2475a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root if (!entropy.open()) { 2476a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return 1; 2477a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 247870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 247970e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root keymaster_device_t* dev; 248070e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root if (keymaster_device_initialize(&dev)) { 248170e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root ALOGE("keystore keymaster could not be initialized; exiting"); 248270e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root return 1; 248370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root } 248470e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 2485eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn ks_is_selinux_enabled = is_selinux_enabled(); 2486eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (ks_is_selinux_enabled) { 2487eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn union selinux_callback cb; 2488eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn cb.func_log = selinux_log_callback; 2489eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn selinux_set_callback(SELINUX_CB_LOG, cb); 2490eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn if (getcon(&tctx) != 0) { 2491eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn ALOGE("SELinux: Could not acquire target context. Aborting keystore.\n"); 2492eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn return -1; 2493eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } 2494eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } else { 2495eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn ALOGI("SELinux: Keystore SELinux is disabled.\n"); 2496eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn } 2497eaabae9bf8ff0873b0ece2a835f71ee6c6b49437Riley Spahn 249870e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root KeyStore keyStore(&entropy, dev); 2499655b958eb2180c7c06889f83f606d23421bf038cKenny Root keyStore.initialize(); 250007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root android::sp<android::IServiceManager> sm = android::defaultServiceManager(); 250107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root android::sp<android::KeyStoreProxy> proxy = new android::KeyStoreProxy(&keyStore); 250207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root android::status_t ret = sm->addService(android::String16("android.security.keystore"), proxy); 250307438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root if (ret != android::OK) { 250407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root ALOGE("Couldn't register binder service!"); 250507438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root return -1; 2506a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root } 250770e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 250807438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root /* 250907438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * We're the only thread in existence, so we're just going to process 251007438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root * Binder transaction as a single-threaded program. 251107438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root */ 251207438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root android::IPCThreadState::self()->joinThreadPool(); 251370e3a86abd2c412d602a018967c01c177eb6cf4eKenny Root 251407438c8d7256d3788dac323b4d0055f201e0bec9Kenny Root keymaster_device_release(dev); 2515a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root return 1; 2516a91203b08350b2fc7efda5b1eab39e7541476b3aKenny Root} 2517