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annotate AES/rijndael.h @ 2:177f640940f2

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Update exception class and cleanup redifinitions During firmware download and exception caused the application to stop. Rootcause was the defference between QT5 and QT6 exception and string handling which is updated now. In addition some old definitions were removed to avoid compiler warnings.
author Ideenmodellierer
date Fri, 28 Nov 2025 19:57:35 +0100
parents 0b3630a29ad8
children
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1
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1 //////////////////////////////////////////////////////////////////////////////
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2 /// \file rijndael.h
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3 /// \brief Public Domain AES encryption/decryption
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4 /// \author Philip J. Erdelsky <pje@efgh.com>, JD Gascuel, and others.
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5 ///
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6 /// \copyright (c) 2015 JD Gascuel. All rights reserved.
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7 /// $Id$
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8 //////////////////////////////////////////////////////////////////////////////
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9 //
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10 // BSD 2-Clause License:
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11 //
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12 // Redistribution and use in source and binary forms, with or without
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13 // modification, are permitted provided that the following conditions
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14 // are met:
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15 //
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16 // 1. Redistributions of source code must retain the above copyright notice,
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17 // this list of conditions and the following disclaimer.
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18 //
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19 // 2. Redistributions in binary form must reproduce the above copyright notice,
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20 // this list of conditions and the following disclaimer in the documentation
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21 // and/or other materials provided with the distribution.
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22 //
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23 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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24 // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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25 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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26 // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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27 // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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28 // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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29 // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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30 // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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31 // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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32 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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33 // THE POSSIBILITY OF SUCH DAMAGE.
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34 //
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35 //////////////////////////////////////////////////////////////////////////////
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36 // HISTORY
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37 // 2002-09-03 PJE: original source http://www.efgh.com/software/rijndael.htm
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38 // 2015-03-14 jDG: Import into OSTC_Companion, major C++ rewrites to insure
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39 // key length is not messed up. Added ECb and CFB modes.
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40
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41 #ifndef RIJNDAEL_H
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42 #define RIJNDAEL_H
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43
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44 namespace Rijndael {
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45
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46 #define KEYLENGTH(keybits) ((keybits)/8)
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47 #define RKLENGTH(keybits) ((keybits)/8+28)
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48 #define NROUNDS(keybits) ((keybits)/32+6)
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49
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50 typedef unsigned long Word32;
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51 typedef unsigned char Byte;
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52 typedef Byte Block[16];
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53
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54 //////////////////////////////////////////////////////////////////////////////
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55 /// \brief Public Domain AES encryption/decryption rewritten.
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56 ///
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57 /// The Rijndael encryption algorithm has been designed to replace the aging
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58 /// DES algorithm. Like DES, it is a block cipher. It uses 128-bit, 192-bit
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59 /// or 256-bit keys. This implementation encrypts 128-bit blocks.
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60 /// (DES used 56-bit keys and 64-bit blocks.)
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61 ///
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62 /// The code in this package is a modified version of an implementation
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63 /// placed in the public domain by the following persons:
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64 /// + Vincent Rijmen vincent.rijmen@esat.kuleuven.ac.be
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65 /// + Antoon Bosselaers antoon.bosselaers@esat.kuleuven.ac.be
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66 /// + Paulo Barreto paulo.barreto@terra.com.br
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67 ///
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68 /// See details in http://www.efgh.com/software/rijndael.htm
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69 ///
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70 struct AES
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71 {
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72 static void setupEncrypt(Word32* rk, const Byte *key, int keybits);
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73 static void setupDecrypt(Word32* rk, const Byte *key, int keybits);
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74 static void encrypt(Word32 *rk, int nrounds, const Block plaintext, Block ciphertext);
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75 static void decrypt(Word32 *rk, int nrounds, const Block ciphertext, Block plaintext);
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76 static Word32 get_random(Word32 *rk, int keybits);
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77 };
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78
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79 //////////////////////////////////////////////////////////////////////////////
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80 template<int keybits>
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81 class ECB : private AES
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82 {
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83 /// \brief Internal state
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84 ///
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85 /// storage for encryption buffer, required space:
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86 /// keybits 32-bit words required
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87 /// 128 44
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88 /// 192 52
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89 /// 256 60
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90 /// \sa RKLENGTH macro.
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91 Word32 rk[RKLENGTH(keybits)];
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92
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93 public:
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94 typedef Byte Key[KEYLENGTH(keybits)];
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95
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96 ECB();
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97
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98 //------------------------------------------------------------------------
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99 /// \brief Initialize encryption state
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100 ///
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101 ///
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102 /// \param[in] key: AES key, where length is:
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103 /// keybits number of bytes
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104 /// 128 16
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105 /// 192 24
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106 /// 256 32
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107 /// \sa KEYLENGTH macro.
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108 ///
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109 /// \code
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110 /// Rijndael::ECB<128>::Key key = "my big secret";
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111 /// Rijndael::ECB<128> enc;
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112 /// enc.setupEncrypt(key);
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113 /// ...
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114 /// Rijndael::Block plain = "Hello World!";
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115 /// Rijndael::Block result;
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116 /// enc.encrypt(plain, result);
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117 /// \endcode
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118 void setupEncrypt(const Key key);
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119
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120 //------------------------------------------------------------------------
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121 /// \brief Encrypt a block of 16 bytes.
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122 ///
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123 /// \param[in] plaintext: The 16 bytes block to encrypt.
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124 /// \param[out] ciphertext: Space to store the 16 bytes of encrypted data.
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125 ///
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126 void encrypt(const Block plaintext, Block ciphertext);
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127
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128 //------------------------------------------------------------------------
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129 /// \brief Initialize decryption state.
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130 ///
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131 /// \param[in] key: AES key, where length is:
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132 /// keybits number of bytes
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133 /// 128 16
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134 /// 192 24
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135 /// 256 32
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136 /// \sa KEYLENGTH macro.
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137 ///
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138 /// \code
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139 /// Rijndael::ECB<128>::Key key = "my big secret";
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140 /// Rijndael::ECB<128> dec;
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141 /// dec.setupDecrypt(key);
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142 /// ...
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143 /// Rijndael::Block cipher = ...;
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144 /// Rijndael::Block result;
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145 /// Rijndael::decrypt(cipher, result);
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146 /// \endcode
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147 void setupDecrypt(const Key key);
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148
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149 //------------------------------------------------------------------------
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150 /// \brief Decrypt a block of 16 bytes.
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151 ///
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152 /// \param[in] ciphertext: The 16 bytes block of data to decrypt.
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153 /// \param[out] plaintext: Space to store the 16 bytes result block.
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154 ///
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155 void decrypt(const Block ciphertext, Block plaintext);
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156
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157 //----------------------------------------------------------------------------
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158 /// \brief Crypto base PRNG
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159 ///
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160 /// Based on wall-clock value and current key, but should be a crypto-secure
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161 /// generator.
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162 Word32 get_random();
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163 };
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164
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165 //////////////////////////////////////////////////////////////////////////////
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166 template<int keybits>
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167 class CFB : public ECB<keybits>
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168 {
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169 /// Initialization vector (salt), updated in CFB mode
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170 /// for the next block of text.
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171 Block iv;
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172
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173 public:
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174 typedef Byte Key[KEYLENGTH(keybits)];
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175 typedef Block IV;
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176
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177 //------------------------------------------------------------------------
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178 /// \brief Initialize encryption/decription state
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179 ///
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180 ///
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181 /// \param[in] key: AES key, where length is:
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182 /// keybits number of bytes
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183 /// 128 16
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184 /// 192 24
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185 /// 256 32
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186 /// \sa KEYLENGTH macro.
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187 /// \param[in] iv: initialization vector. Some randomness needed to
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188 /// enforce the sequence is non replayable.
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189 ///
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190 /// \code
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191 /// Rijndael::CFB<128>::Key key = "my big secret";
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192 /// Rijndael::CFB<128> enc(key, iv);
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193 /// ...
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194 /// Rijndael::Block plain = "Hello World!";
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195 /// Rijndael::Block cipher, again;
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196 /// enc.encrypt(plain, cipher);
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197 /// enc.decrypt(cipher, again);
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198 /// \endcode
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199 CFB(const Key key, const IV iv);
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200
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201 //------------------------------------------------------------------------
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202 /// \brief Encrypt a block of 16 bytes, with IV (CFB mode)
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203 ///
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204 /// \param[in] plaintext: The 16 bytes block to encrypt.
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205 /// \param[out] ciphertext: Space to store the 16 bytes of encrypted data.
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206 ///
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207 void encrypt(const Block plaintext, Block ciphertext);
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208
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209 //----------------------------------------------------------------------------
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210 /// \brief Decrypt a block of 16 bytes, with IV (CFB mode)
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211 ///
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212 /// \param[in] ciphertext: The 16 bytes block of data to decrypt.
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213 /// \param[out] plaintext: Space to store the 16 bytes result block.
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214 ///
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215 void decrypt(const Block ciphertext, Block plaintext);
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216 };
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217
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218 //////////////////////////////////////////////////////////////////////////////
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219
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220 template<int keybits>
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221 ECB<keybits>::ECB()
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222 {
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223 for(int i=0; i<RKLENGTH(keybits); ++i)
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224 rk[i] = 0;
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225 }
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226
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227 template<int keybits>
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228 void ECB<keybits>::setupEncrypt(const Key key)
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229 {
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230 AES::setupEncrypt(rk, key, keybits);
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231 }
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232
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233 template<int keybits>
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234 void ECB<keybits>::encrypt(const Block plaintext, Block ciphertext)
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235 {
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236 AES::encrypt(rk, NROUNDS(keybits), plaintext, ciphertext);
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237 }
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238
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239 //////////////////////////////////////////////////////////////////////////////
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240
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241 template<int keybits>
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242 void ECB<keybits>::setupDecrypt(const Key key)
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243 {
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244 AES::setupDecrypt(rk, key, keybits);
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245 }
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246
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247 template<int keybits>
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248 void ECB<keybits>::decrypt(const Block ciphertext, Block plaintext)
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249 {
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250 AES::decrypt(rk, NROUNDS(keybits), ciphertext, plaintext);
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251 }
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252
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253 //////////////////////////////////////////////////////////////////////////////
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254
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255 template<int keybits>
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256 Word32 ECB<keybits>::get_random()
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257 {
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258 return AES::get_random(rk, keybits);
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259 }
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260
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261 //////////////////////////////////////////////////////////////////////////////
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262
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263 template<int keybits>
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264 CFB<keybits>::CFB(const Key key, const IV _iv)
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265 {
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266 ECB<keybits>::setupEncrypt(key);
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267 for(int i=0; i<16; ++i)
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268 iv[i] = _iv[i];
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269 }
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270
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271 template<int keybits>
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272 void CFB<keybits>::encrypt(const Block plaintext, Block ciphertext)
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273 {
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274 Block tmp;
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275 ECB<keybits>::encrypt(iv, tmp);
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276 for(int i=0; i<16; ++i)
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277 {
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278 ciphertext[i] = plaintext[i] ^ tmp[i];
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279 iv[i] = ciphertext[i];
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280 }
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281 }
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282
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283 template<int keybits>
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284 void CFB<keybits>::decrypt(const Block ciphertext, Block plaintext)
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285 {
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286 Block tmp;
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287 ECB<keybits>::encrypt(iv, tmp);
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288 for(int i=0; i<16; ++i)
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289 {
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290 plaintext[i] = ciphertext[i] ^ tmp[i];
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291 iv[i] = ciphertext[i];
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292 }
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293 }
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294
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295 }
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296 #endif // RIJNDAEL_H