Dooble
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,
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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 
33 extern "C"
34 {
35 #include <stdint.h>
36 }
37 
38 #include "dooble_block_cipher.h"
39 
41 {
42  public:
43  dooble_aes256(const QByteArray &key);
44  ~dooble_aes256();
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