crypto_des_cbc.h revision c0beca55d290fe0b1c96d78cbbcf94b05c23f5a5 
1//
2// Copyright (C) 2011 The Android Open Source Project
3//
4// Licensed under the Apache License, Version 2.0 (the "License");
5// you may not use this file except in compliance with the License.
6// You may obtain a copy of the License at
7//
8//      http://www.apache.org/licenses/LICENSE-2.0
9//
10// Unless required by applicable law or agreed to in writing, software
11// distributed under the License is distributed on an "AS IS" BASIS,
12// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13// See the License for the specific language governing permissions and
14// limitations under the License.
15//
16
17#ifndef SHILL_CRYPTO_DES_CBC_H_
18#define SHILL_CRYPTO_DES_CBC_H_
19
20#include <string>
21#include <vector>
22
23#include <base/macros.h>
24#include <gtest/gtest_prod.h>  // for FRIEND_TEST
25
26#include "shill/crypto_interface.h"
27
28namespace base {
29
30class FilePath;
31
32}  // namespace base
33
34namespace shill {
35
36// DES-CBC crypto module implementation.
37class CryptoDESCBC : public CryptoInterface {
38 public:
39  static const char kID[];
40
41  CryptoDESCBC();
42
43  // Sets the DES key to the last |kBlockSize| bytes of |key_matter_path| and
44  // the DES initialization vector to the second to last |kBlockSize| bytes of
45  // |key_matter_path|. Returns true on success.
46  bool LoadKeyMatter(const base::FilePath& path);
47
48  // Inherited from CryptoInterface.
49  virtual std::string GetID();
50  virtual bool Encrypt(const std::string& plaintext, std::string* ciphertext);
51  virtual bool Decrypt(const std::string& ciphertext, std::string* plaintext);
52
53  const std::vector<char>& key() const { return key_; }
54  const std::vector<char>& iv() const { return iv_; }
55
56 private:
57  FRIEND_TEST(CryptoDESCBCTest, Decrypt);
58  FRIEND_TEST(CryptoDESCBCTest, Encrypt);
59
60  static const unsigned int kBlockSize;
61  static const char kSentinel[];
62  static const char kVersion2Prefix[];
63
64  std::vector<char> key_;
65  std::vector<char> iv_;
66
67  DISALLOW_COPY_AND_ASSIGN(CryptoDESCBC);
68};
69
70}  // namespace shill
71
72#endif  // SHILL_CRYPTO_DES_CBC_H_
73