/** * Decrypt Android user data. * * @param user Android user id * @param password Android user passwd * * @return 0 on success, negative value on error */ int android_decrypt_user_data(int user, char *password) { char storage_path[MAX_PATH_LENGTH]; int ret; LOGI("Decrypt user %d data", user); android_stop_services(); memset(storage_path, 0, sizeof(storage_path)); sprintf(storage_path, "%s%d/", ANDROID_USER_DATA_PATH, user); if (user == PRIMARY_USER) { ret = umount_ecryptfs(ANDROID_PRIMARY_USER_DATA_PATH); if (ret < 0) { LOGE("Error unmounting %s", ANDROID_PRIMARY_USER_DATA_PATH); return ret; } } else { ret = EFS_lock(storage_path); if (ret < 0) { LOGE("Can't unlock efs storage"); return ret; } } ret = EFS_recover_data_and_remove(storage_path, password); if (ret < 0) { LOGE("Error decrypting efs storage"); return ret; } memset(storage_path, 0, sizeof(storage_path)); sprintf(storage_path, "%s%d/", ANDROID_VIRTUAL_SDCARD_PATH, user); ret = EFS_lock(storage_path); if (ret < 0) { LOGE("Can't unlock efs storage"); return ret; } ret = EFS_recover_data_and_remove(storage_path, password); if (ret < 0) { LOGE("Error decrypting efs storage"); return ret; } if (user == PRIMARY_USER) { android_reboot(ANDROID_RB_RESTART, 0, 0); } android_start_services(); return 0; }
int EncryptedFileStorageCmd::runCommand(SocketClient *cli, int argc, char **argv) { int rc = 0; if ((cli->getUid() != 0) && (cli->getUid() != AID_SYSTEM)) { cli->sendMsg(ResponseCode::CommandNoPermission, "No permission to run EFS commands", false); return 0; } if (argc < 3) { cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing Argument", false); return 0; } if (!strcmp(argv[1], "create")) { if (argc != 4) { cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: efs create <storage_path> <passwd>", false); return 0; } rc = EFS_create(argv[2],argv[3]); } else if (!strcmp(argv[1], "unlock")) { if (argc != 4) { cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: efs unlock <storage_path> <passwd>", false); return 0; } rc = EFS_unlock(argv[2], argv[3]); } else if (!strcmp(argv[1], "lock")) { if (argc != 3) { cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: efs lock <storage_path>", false); return 0; } rc = EFS_lock(argv[2]); } else if (!strcmp(argv[1], "change_passwd")) { if (argc != 5) { cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: efs change_passwd <storage_path> <old_passwd> <new_passwd>", false); return 0; } rc = EFS_change_password(argv[2],argv[3],argv[4]); } else if (!strcmp(argv[1], "remove")) { if (argc != 3) { cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: efs remove <storage_path>", false); return 0; } rc = EFS_remove(argv[2]); } else if (!strcmp(argv[1], "recover")) { if (argc != 4) { cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: efs recover <storage_path> <password>", false); return 0; } rc = EFS_recover_data_and_remove(argv[2], argv[3]); } else if (!strcmp(argv[1], "stat")) { if (argc != 3) { cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: efs stat <storage_path>", false); return 0; } rc = EFS_get_status(argv[2]); } else if (!strcmp(argv[1], "get_progress")) { if (argc != 3) { cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: efs get_progress <storage_path>", false); return 0; } rc = EFS_get_progress(argv[2]); } else if (!strcmp(argv[1], "encrypt_user_data")) { if (argc != 4) { cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: efs encrypt_user_data <userId> <password>", false); return 0; } rc = android_encrypt_user_data(atoi(argv[2]), argv[3]); } else if (!strcmp(argv[1], "unlock_user_data")) { if (argc != 4) { cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: efs unlock_user_data <userId> <password>", false); return 0; } rc = android_unlock_user_data(atoi(argv[2]), argv[3]); } else if (!strcmp(argv[1], "lock_user_data")) { if (argc != 3) { cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: efs lock_user_data <userId>", false); return 0; } rc = android_lock_user_data(atoi(argv[2])); } else if (!strcmp(argv[1], "change_user_data_passwd")) { if (argc != 5) { cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: efs change_user_data_passwd <userId> <old_passwd> <new_passwd>", false); return 0; } rc = android_change_user_data_password(atoi(argv[2]),argv[3],argv[4]); } else if (!strcmp(argv[1], "decrypt_user_data")) { if (argc != 4) { cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: efs decrypt_user_data <userId> <password>", false); return 0; } rc = android_decrypt_user_data(atoi(argv[2]), argv[3]); } else if (!strcmp(argv[1], "remove_user_encrypted_data")) { if (argc != 3) { cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: efs remove_user_encrypted_data <userId>", false); return 0; } rc = android_remove_user_encrypted_data(atoi(argv[2])); } else if (!strcmp(argv[1], "user_stat")) { if (argc != 3) { cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: efs user_stat <userId>", false); return 0; } rc = android_get_encrypted_user_status(atoi(argv[2])); } else { cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown efs-tools cmd", false); } // Always report that the command succeeded and return the error code. // The caller will check the return value to see what the error was. char msg[255]; snprintf(msg, sizeof(msg), "%d", rc); cli->sendMsg(ResponseCode::CommandOkay, msg, false); return 0; }