Dooble
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dooble_aes256.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_aes256_h
29#define dooble_aes256_h
30
31#include <QByteArray>
32
33extern "C"
34{
35#include <stdint.h>
36}
37
38#include "dooble_block_cipher.h"
39
41{
42 public:
43 dooble_aes256(const QByteArray &key);
45 QByteArray decrypt(const QByteArray &data);
46 QByteArray encrypt(const QByteArray &data);
47 static void test1(void);
48 static void test1_decrypt_block(void);
49 static void test1_encrypt_block(void);
50 static void test1_key_expansion(void);
51 static void test_performance(void);
52 void set_key(const QByteArray &key);
53
54 private:
55 size_t m_Nb;
56 size_t m_Nk;
57 size_t m_Nr;
58 uint8_t m_round_key[60][4] {};
59 uint8_t m_state[4][4] {}; // 4 rows, Nb columns.
60 QByteArray decrypt_block(const QByteArray &block);
61 QByteArray encrypt_block(const QByteArray &block);
62
63 uint8_t xtime(uint8_t x)
64 {
65 return static_cast<uint8_t> ((x << 1) ^ (((x >> 7) & 1) * 0x1b));
66 }
67
68 uint8_t xtime_special(uint8_t x, uint8_t y)
69 {
70 auto xtime_y = xtime(y);
71
72 return static_cast<uint8_t>
73 (((x & 1) * y) ^
74 (((x >> 1) & 1) * xtime_y) ^
75 (((x >> 2) & 1) * xtime(xtime_y)) ^
76 (((x >> 3) & 1) * xtime(xtime(xtime_y))) ^
77 (((x >> 4) & 1) * xtime(xtime(xtime(xtime_y)))));
78 }
79
80 void add_round_key(size_t c);
81 void inv_mix_columns(void);
82 void inv_shift_rows(void);
83 void inv_sub_bytes(void);
84 void key_expansion(void);
85 void mix_columns(void);
86 void shift_rows(void);
87 void sub_bytes(void);
88};
89
90#endif
Definition dooble_aes256.h:41
Definition dooble_block_cipher.h:34