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 WEBSERVER_WEBSERVD_ENCRYPTOR_H_
16#define WEBSERVER_WEBSERVD_ENCRYPTOR_H_
17
18#include <memory>
19#include <string>
20
21namespace webservd {
22
23// An abstract class to perform authenticated encryption.
24class Encryptor {
25 public:
26  virtual ~Encryptor() = default;
27
28  // Encrypts and authenticates the given |plaintext| and emits the
29  // |ciphertext|. Returns true on success.
30  virtual bool EncryptWithAuthentication(const std::string& plaintext,
31                                         std::string* ciphertext) = 0;
32
33  // Decrypts and authenticates the given |ciphertext| and emits the
34  // |plaintext|. Returns true on success.
35  virtual bool DecryptWithAuthentication(const std::string& ciphertext,
36                                         std::string* plaintext) = 0;
37
38  // A factory method to be exported by the default Encryptor implementation
39  // for a given platform. Like a constructor, this method should not perform
40  // any significant initialization work. The caller assumes ownership of the
41  // pointer.
42  static std::unique_ptr<Encryptor> CreateDefaultEncryptor();
43};
44
45}  // namespace webservd
46
47#endif  // WEBSERVER_WEBSERVD_ENCRYPTOR_H_
48