1 /****************************************************************************** 2 * 3 * Copyright 2019 Google, Inc. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 19 #include <base/logging.h> 20 #include <keystore/keystore_client_impl.h> 21 #include <mutex> 22 23 #include "osi/include/alarm.h" 24 #include "osi/include/allocator.h" 25 #include "osi/include/compat.h" 26 #include "osi/include/config.h" 27 #include "osi/include/log.h" 28 #include "osi/include/osi.h" 29 #include "osi/include/properties.h" 30 31 namespace bluetooth { 32 /** 33 * Client wrapper to access AndroidKeystore. 34 * 35 * <p>Use to encrypt/decrypt data and store to disk. 36 */ 37 class BtifKeystore { 38 public: 39 /** 40 * @param keystore_client injected pre-created client object for keystore 41 */ 42 BtifKeystore(keystore::KeystoreClient* keystore_client); 43 44 /** 45 * Encrypts given data 46 * 47 * <p>Returns a string representation of the encrypted data 48 * 49 * @param data to be encrypted 50 * @param flags for keystore 51 */ 52 std::string Encrypt(const std::string& data, int32_t flags); 53 54 /** 55 * Returns a decrypted string representation of the encrypted data or empty 56 * string on error. 57 * 58 * @param input encrypted data 59 */ 60 std::string Decrypt(const std::string& input_filename); 61 62 /** 63 * Check for existence of keystore key. 64 * 65 * This key can be cleared if a user manually wipes bluetooth storage data 66 * b/133214365 67 */ 68 bool DoesKeyExist(); 69 70 private: 71 std::unique_ptr<keystore::KeystoreClient> keystore_client_; 72 std::mutex api_mutex_; 73 keystore::KeyStoreNativeReturnCode GenerateKey(const std::string& name, 74 int32_t flags, 75 bool auth_bound); 76 }; 77 78 } // namespace bluetooth 79