Dooble
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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);
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