1// Copyright (c) 2010 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef COMPONENTS_WEBDATA_ENCRYPTOR_ENCRYPTOR_H_
6#define COMPONENTS_WEBDATA_ENCRYPTOR_ENCRYPTOR_H_
7
8#include <string>
9
10#include "base/strings/string16.h"
11
12// The Encryptor class gives access to simple encryption and decryption of
13// strings.  Note that on Mac, access to the system Keychain is required and
14// these calls can block the current thread to collect user input.
15class Encryptor {
16 public:
17  // Encrypt a string16. The output (second argument) is
18  // really an array of bytes, but we're passing it back
19  // as a std::string
20  static bool EncryptString16(const base::string16& plaintext,
21                              std::string* ciphertext);
22
23  // Decrypt an array of bytes obtained with EncryptString16
24  // back into a string16. Note that the input (first argument)
25  // is a std::string, so you need to first get your (binary)
26  // data into a string.
27  static bool DecryptString16(const std::string& ciphertext,
28                              base::string16* plaintext);
29
30  // Encrypt a string.
31  static bool EncryptString(const std::string& plaintext,
32                            std::string* ciphertext);
33
34  // Decrypt an array of bytes obtained with EnctryptString
35  // back into a string. Note that the input (first argument)
36  // is a std::string, so you need to first get your (binary)
37  // data into a string.
38  static bool DecryptString(const std::string& ciphertext,
39                            std::string* plaintext);
40
41#if defined(OS_MACOSX)
42  // For unit testing purposes we instruct the Encryptor to use a mock Keychain
43  // on the Mac.  The default is to use the real Keychain.
44  static void UseMockKeychain(bool use_mock);
45#endif
46
47 private:
48  DISALLOW_IMPLICIT_CONSTRUCTORS(Encryptor);
49};
50
51#endif  // COMPONENTS_WEBDATA_ENCRYPTOR_ENCRYPTOR_H_
52