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<div class="title">apps/elftosb/common/rijndael.h</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#ifndef _RIJNDAEL_H_</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#define _RIJNDAEL_H_</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> </div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// File : rijndael.h</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// Creation date : Sun Nov 5 2000 03:21:05 CEST</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// Author : Szymon Stefanek (stefanek@tin.it)</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">//</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// Another implementation of the Rijndael cipher.</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// This is intended to be an easily usable library file.</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// This code is public domain.</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// Based on the Vincent Rijmen and K.U.Leuven implementation 2.4.</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">//</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment">//</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">// Original Copyright notice:</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">//</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">// rijndael-alg-fst.c v2.4 April '2000</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">// rijndael-alg-fst.h</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">// rijndael-api-fst.c</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// rijndael-api-fst.h</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">//</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// Optimised ANSI C code</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">//</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">// authors: v1.0: Antoon Bosselaers</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">// v2.0: Vincent Rijmen, K.U.Leuven</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment">// v2.3: Paulo Barreto</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">// v2.4: Vincent Rijmen, K.U.Leuven</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment">//</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">// This code is placed in the public domain.</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">//</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment">//</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment">// This implementation works on 128 , 192 , 256 bit keys</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">// and on 128 bit blocks</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">//</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment">//</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment">// Example of usage:</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment">//</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment">// // Input data</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment">// unsigned char key[32]; // The key</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">// initializeYour256BitKey(); // Obviously initialized with sth</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">// const unsigned char * plainText = getYourPlainText(); // Your plain text</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">// int plainTextLen = strlen(plainText); // Plain text length</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment">//</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment">// // Encrypting</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment">// Rijndael rin;</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">// unsigned char output[plainTextLen + 16];</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment">//</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment">// rin.init(Rijndael::CBC,Rijndael::Encrypt,key,Rijndael::Key32Bytes);</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment">// // It is a good idea to check the error code</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment">// int len = rin.padEncrypt(plainText,len,output);</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment">// if(len >= 0)useYourEncryptedText();</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment">// else encryptError(len);</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment">//</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment">// // Decrypting: we can reuse the same object</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment">// unsigned char output2[len];</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment">// rin.init(Rijndael::CBC,Rijndael::Decrypt,key,Rijndael::Key32Bytes));</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment">// len = rin.padDecrypt(output,len,output2);</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment">// if(len >= 0)useYourDecryptedText();</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment">// else decryptError(len);</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment">//</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="preprocessor">#include "stdafx.h"</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="preprocessor">#define _MAX_KEY_COLUMNS (256 / 32)</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#define _MAX_ROUNDS 14</span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor">#define MAX_IV_SIZE 16</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment">// We assume that unsigned int is 32 bits long....</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment">// typedef unsigned char uint8_t;</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment">// typedef unsigned int uint32_t;</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment">// typedef unsigned short uint16_t;</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment">// Error codes</span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="preprocessor">#define RIJNDAEL_SUCCESS 0</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor">#define RIJNDAEL_UNSUPPORTED_MODE -1</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="preprocessor">#define RIJNDAEL_UNSUPPORTED_DIRECTION -2</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="preprocessor">#define RIJNDAEL_UNSUPPORTED_KEY_LENGTH -3</span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="preprocessor">#define RIJNDAEL_BAD_KEY -4</span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="preprocessor">#define RIJNDAEL_NOT_INITIALIZED -5</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="preprocessor">#define RIJNDAEL_BAD_DIRECTION -6</span></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="preprocessor">#define RIJNDAEL_CORRUPTED_DATA -7</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> </div><div class="line"><a name="l00086"></a><span class="lineno"><a class="line" href="class_rijndael.html"> 86</a></span> <span class="keyword">class </span><a class="code" href="class_rijndael.html">Rijndael</a></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> {</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keyword">enum</span> Direction</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  {</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  Encrypt,</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  Decrypt</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  };</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">enum</span> Mode</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  {</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  ECB,</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  CBC,</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  CFB1</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  };</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keyword">enum</span> KeyLength</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  {</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  Key16Bytes,</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  Key24Bytes,</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  Key32Bytes</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  };</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="comment">//</span></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="comment">// Creates a Rijndael cipher object</span></div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="comment">// You have to call init() before you can encrypt or decrypt stuff</span></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="comment">//</span></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <a class="code" href="class_rijndael.html">Rijndael</a>();</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  ~<a class="code" href="class_rijndael.html">Rijndael</a>();</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> </div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="keyword">protected</span>:</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="comment">// Internal stuff</span></div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keyword">enum</span> State</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  {</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  Valid,</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  Invalid</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  };</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> </div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  State m_state;</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  Mode m_mode;</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  Direction m_direction;</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  uint8_t m_initVector[MAX_IV_SIZE];</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  uint32_t m_uRounds;</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  uint8_t m_expandedKey[_MAX_ROUNDS + 1][4][4];</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="comment">// API</span></div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment"></span></div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="comment">// init(): Initializes the crypt session</span></div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="comment">// Returns RIJNDAEL_SUCCESS or an error code</span></div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="comment">// mode : Rijndael::ECB, Rijndael::CBC or Rijndael::CFB1</span></div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="comment">// You have to use the same mode for encrypting and decrypting</span></div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="comment">// dir : Rijndael::Encrypt or Rijndael::Decrypt</span></div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="comment">// A cipher instance works only in one direction</span></div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="comment">// (Well , it could be easily modified to work in both</span></div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="comment">// directions with a single init() call, but it looks</span></div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="comment">// useless to me...anyway , it is a matter of generating</span></div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="comment">// two expanded keys)</span></div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="comment">// key : array of unsigned octets , it can be 16 , 24 or 32 bytes long</span></div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="comment">// this CAN be binary data (it is not expected to be null terminated)</span></div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="comment">// keyLen : Rijndael::Key16Bytes , Rijndael::Key24Bytes or Rijndael::Key32Bytes</span></div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="comment">// initVector: initialization vector, you will usually use 0 here</span></div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordtype">int</span> init(Mode mode, Direction dir, <span class="keyword">const</span> uint8_t *key, KeyLength keyLen, uint8_t *initVector = 0);</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="comment">// Encrypts the input array (can be binary data)</span></div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="comment">// The input array length must be a multiple of 16 bytes, the remaining part</span></div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="comment">// is DISCARDED.</span></div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="comment">// so it actually encrypts inputLen / 128 blocks of input and puts it in outBuffer</span></div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="comment">// Input len is in BITS!</span></div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="comment">// outBuffer must be at least inputLen / 8 bytes long.</span></div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="comment">// Returns the encrypted buffer length in BITS or an error code < 0 in case of error</span></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordtype">int</span> blockEncrypt(<span class="keyword">const</span> uint8_t *input, <span class="keywordtype">int</span> inputLen, uint8_t *outBuffer);</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="comment">// Encrypts the input array (can be binary data)</span></div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="comment">// The input array can be any length , it is automatically padded on a 16 byte boundary.</span></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="comment">// Input len is in BYTES!</span></div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="comment">// outBuffer must be at least (inputLen + 16) bytes long</span></div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="comment">// Returns the encrypted buffer length in BYTES or an error code < 0 in case of error</span></div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordtype">int</span> padEncrypt(<span class="keyword">const</span> uint8_t *input, <span class="keywordtype">int</span> inputOctets, uint8_t *outBuffer);</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="comment">// Decrypts the input vector</span></div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="comment">// Input len is in BITS!</span></div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="comment">// outBuffer must be at least inputLen / 8 bytes long</span></div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="comment">// Returns the decrypted buffer length in BITS and an error code < 0 in case of error</span></div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordtype">int</span> blockDecrypt(<span class="keyword">const</span> uint8_t *input, <span class="keywordtype">int</span> inputLen, uint8_t *outBuffer);</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="comment">// Decrypts the input vector</span></div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="comment">// Input len is in BYTES!</span></div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="comment">// outBuffer must be at least inputLen bytes long</span></div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="comment">// Returns the decrypted buffer length in BYTES and an error code < 0 in case of error</span></div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordtype">int</span> padDecrypt(<span class="keyword">const</span> uint8_t *input, <span class="keywordtype">int</span> inputOctets, uint8_t *outBuffer);</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span> </div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="keyword">protected</span>:</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordtype">void</span> keySched(uint8_t key[_MAX_KEY_COLUMNS][4]);</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordtype">void</span> keyEncToDec();</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keywordtype">void</span> encrypt(<span class="keyword">const</span> uint8_t a[16], uint8_t b[16]);</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordtype">void</span> decrypt(<span class="keyword">const</span> uint8_t a[16], uint8_t b[16]);</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> };</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span> </div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="preprocessor">#endif // _RIJNDAEL_H_</span></div><div class="ttc" id="class_rijndael_html"><div class="ttname"><a href="class_rijndael.html">Rijndael</a></div><div class="ttdef"><b>Definition:</b> apps/elftosb/common/rijndael.h:86</div></div>
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