1 // Copyright 2015 The Android Open Source Project 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef BUFFET_ENCRYPTOR_H_ 16 #define BUFFET_ENCRYPTOR_H_ 17 18 #include <memory> 19 #include <string> 20 21 #include <base/macros.h> 22 23 namespace buffet { 24 25 // An abstract class to perform authenticated encryption. 26 class Encryptor { 27 public: 28 Encryptor() = default; 29 virtual ~Encryptor() = default; 30 31 // Encrypts and authenticates the given |plaintext| and emits the 32 // |ciphertext|. Returns true on success. 33 virtual bool EncryptWithAuthentication(const std::string& plaintext, 34 std::string* ciphertext) = 0; 35 36 // Decrypts and authenticates the given |ciphertext| and emits the 37 // |plaintext|. Returns true on success. 38 virtual bool DecryptWithAuthentication(const std::string& ciphertext, 39 std::string* plaintext) = 0; 40 41 // A factory method to be exported by the default Encryptor implementation 42 // for a given platform. Like a constructor, this method should not perform 43 // any significant initialization work. The caller assumes ownership of the 44 // pointer. 45 static std::unique_ptr<Encryptor> CreateDefaultEncryptor(); 46 47 private: 48 DISALLOW_COPY_AND_ASSIGN(Encryptor); 49 }; 50 51 } // namespace buffet 52 53 #endif // BUFFET_ENCRYPTOR_H_ 54
