Dooble
dooble_block_cipher.h
1 /*
2 ** Copyright (c) 2008 - present, Alexis Megas.
3 ** All rights reserved.
4 **
5 ** Redistribution and use in source and binary forms, with or without
6 ** modification, are permitted provided that the following conditions
7 ** are met:
8 ** 1. Redistributions of source code must retain the above copyright
9 ** notice, this list of conditions and the following disclaimer.
10 ** 2. Redistributions in binary form must reproduce the above copyright
11 ** notice, this list of conditions and the following disclaimer in the
12 ** documentation and/or other materials provided with the distribution.
13 ** 3. The name of the author may not be used to endorse or promote products
14 ** derived from Dooble without specific prior written permission.
15 **
16 ** DOOBLE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 ** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 ** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 ** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 ** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 ** DOOBLE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27 
28 #ifndef dooble_block_cipher_h
29 #define dooble_block_cipher_h
30 
31 #include <QByteArray>
32 
34 {
35  public:
36  virtual ~dooble_block_cipher();
37  virtual QByteArray decrypt(const QByteArray &data) = 0;
38  virtual QByteArray encrypt(const QByteArray &data) = 0;
39  virtual void set_key(const QByteArray &key) = 0;
40  virtual void set_tweak(const QByteArray &tweak, bool *ok);
41 
42  protected:
43  QByteArray m_key;
44  int m_block_length;
45  int m_key_length;
46  dooble_block_cipher(const QByteArray &key);
47  dooble_block_cipher(void);
48 
49  static QByteArray xor_arrays(const QByteArray &a, const QByteArray &b)
50  {
51  QByteArray bytes;
52  auto length = qMin(a.length(), b.length());
53 
54  for(int i = 0; i < length; i++)
55  bytes.append(static_cast<char> (a[i] ^ b[i]));
56 
57  return bytes;
58  }
59 };
60 
61 #endif
Definition: dooble_block_cipher.h:34