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<a href="xtea_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * An 32-bit implementation of the XTEA algorithm</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * Copyright (C) 2006-2014, Brainspark B.V.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * This file is part of PolarSSL (http://www.polarssl.org)</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org></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"> * All rights reserved.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * This program is free software; you can redistribute it and/or modify</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * it under the terms of the GNU General Public License as published by</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * the Free Software Foundation; either version 2 of the License, or</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * (at your option) any later version.</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"> * This program is distributed in the hope that it will be useful,</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * GNU General Public License for more details.</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * You should have received a copy of the GNU General Public License along</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * with this program; if not, write to the Free Software Foundation, Inc.,</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.</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> </div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#if !defined(POLARSSL_CONFIG_FILE)</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor"></span><span class="preprocessor">#include "<a class="code" href="config_8h.html">polarssl/config.h</a>"</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor"></span><span class="preprocessor">#include POLARSSL_CONFIG_FILE</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#if defined(POLARSSL_XTEA_C)</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include "<a class="code" href="xtea_8h.html">polarssl/xtea.h</a>"</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#if defined(POLARSSL_PLATFORM_C)</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor"></span><span class="preprocessor">#include "<a class="code" href="platform_8h.html">polarssl/platform.h</a>"</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor"></span><span class="preprocessor">#define polarssl_printf printf</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#if !defined(POLARSSL_XTEA_ALT)</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">/* Implementation that should never be optimized out by the compiler */</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="keyword">static</span> <span class="keywordtype">void</span> polarssl_zeroize( <span class="keywordtype">void</span> *v, <span class="keywordtype">size_t</span> n ) {</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keyword">volatile</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *p = v; <span class="keywordflow">while</span>( n-- ) *p++ = 0;</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> }</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> * 32-bit integer manipulation macros (big endian)</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#ifndef GET_UINT32_BE</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor"></span><span class="preprocessor">#define GET_UINT32_BE(n,b,i) \</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor">{ \</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor"> (n) = ( (uint32_t) (b)[(i) ] << 24 ) \</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor"> | ( (uint32_t) (b)[(i) + 1] << 16 ) \</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor"> | ( (uint32_t) (b)[(i) + 2] << 8 ) \</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor"> | ( (uint32_t) (b)[(i) + 3] ); \</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="preprocessor">}</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor">#ifndef PUT_UINT32_BE</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor"></span><span class="preprocessor">#define PUT_UINT32_BE(n,b,i) \</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="preprocessor">{ \</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="preprocessor"> (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="preprocessor"> (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="preprocessor"> (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor"> (b)[(i) + 3] = (unsigned char) ( (n) ); \</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor">}</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="keywordtype">void</span> <a class="code" href="xtea_8h.html#a6e92b27a7301c5b521c13d844f06f0ab">xtea_init</a>( <a class="code" href="structxtea__context.html">xtea_context</a> *ctx )</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> {</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  memset( ctx, 0, <span class="keyword">sizeof</span>( <a class="code" href="structxtea__context.html">xtea_context</a> ) );</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> </div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="keywordtype">void</span> <a class="code" href="xtea_8h.html#a51b6944567d78a15810ad74ca1603735">xtea_free</a>( <a class="code" href="structxtea__context.html">xtea_context</a> *ctx )</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> {</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">if</span>( ctx == NULL )</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  polarssl_zeroize( ctx, <span class="keyword">sizeof</span>( <a class="code" href="structxtea__context.html">xtea_context</a> ) );</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> }</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"> * XTEA key schedule</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="keywordtype">void</span> <a class="code" href="xtea_8h.html#af3dbab39c255385de39650070c1bbfa2">xtea_setup</a>( <a class="code" href="structxtea__context.html">xtea_context</a> *ctx, <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> key[16] )</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> {</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordtype">int</span> i;</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  memset( ctx, 0, <span class="keyword">sizeof</span>(<a class="code" href="structxtea__context.html">xtea_context</a>) );</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="keywordflow">for</span>( i = 0; i < 4; i++ )</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>  <a class="code" href="test__suite__aes_8cbc_8c.html#a37e0e1a97807195e2de54fd6487751d3">GET_UINT32_BE</a>( ctx-><a class="code" href="structxtea__context.html#a9f8d2371f6498f71eea654cf5483f9d6">k</a>[i], key, i << 2 );</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  }</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> }</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="comment">/*</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"> * XTEA encrypt function</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="keywordtype">int</span> <a class="code" href="xtea_8h.html#a567fc0be7301210fa16f33a9062f71ed">xtea_crypt_ecb</a>( <a class="code" href="structxtea__context.html">xtea_context</a> *ctx, <span class="keywordtype">int</span> mode,</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> input[8], <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> output[8])</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>  uint32_t *k, v0, v1, i;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  k = ctx-><a class="code" href="structxtea__context.html#a9f8d2371f6498f71eea654cf5483f9d6">k</a>;</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <a class="code" href="test__suite__aes_8cbc_8c.html#a37e0e1a97807195e2de54fd6487751d3">GET_UINT32_BE</a>( v0, input, 0 );</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <a class="code" href="test__suite__aes_8cbc_8c.html#a37e0e1a97807195e2de54fd6487751d3">GET_UINT32_BE</a>( v1, input, 4 );</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="keywordflow">if</span>( mode == <a class="code" href="xtea_8h.html#aa75a338c8b1485f3dcd52ff788312136">XTEA_ENCRYPT</a> )</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  {</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  uint32_t sum = 0, delta = 0x9E3779B9;</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>  <span class="keywordflow">for</span>( i = 0; i < 32; i++ )</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  {</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  v0 += (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + k[sum & 3]);</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  sum += delta;</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  v1 += (((v0 << 4) ^ (v0 >> 5)) + v0) ^ (sum + k[(sum>>11) & 3]);</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  }</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  }</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">else</span> <span class="comment">/* XTEA_DECRYPT */</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  {</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  uint32_t delta = 0x9E3779B9, sum = delta * 32;</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="keywordflow">for</span>( i = 0; i < 32; i++ )</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  {</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  v1 -= (((v0 << 4) ^ (v0 >> 5)) + v0) ^ (sum + k[(sum>>11) & 3]);</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  sum -= delta;</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  v0 -= (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + k[sum & 3]);</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  }</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  }</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> </div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <a class="code" href="test__suite__aes_8cbc_8c.html#a4671795996d0aae650c87a82bca7b880">PUT_UINT32_BE</a>( v0, output, 0 );</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <a class="code" href="test__suite__aes_8cbc_8c.html#a4671795996d0aae650c87a82bca7b880">PUT_UINT32_BE</a>( v1, output, 4 );</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> </div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> }</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> </div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="preprocessor">#if defined(POLARSSL_CIPHER_MODE_CBC)</span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="preprocessor"></span><span class="comment">/*</span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment"> * XTEA-CBC buffer encryption/decryption</span></div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="keywordtype">int</span> <a class="code" href="xtea_8h.html#a51653f454cb805f026e9ce940d6f5bae">xtea_crypt_cbc</a>( <a class="code" href="structxtea__context.html">xtea_context</a> *ctx, <span class="keywordtype">int</span> mode, <span class="keywordtype">size_t</span> length,</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> iv[8], <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *input,</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *output)</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> {</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordtype">int</span> i;</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> temp[8];</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> </div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keywordflow">if</span>( length % 8 )</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keywordflow">return</span>( <a class="code" href="xtea_8h.html#a9c09eafcc6b5bacc7d3617daaf357727">POLARSSL_ERR_XTEA_INVALID_INPUT_LENGTH</a> );</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span> </div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keywordflow">if</span>( mode == <a class="code" href="xtea_8h.html#a12112dc96c2e7b6f1b6a5b38a9471c01">XTEA_DECRYPT</a> )</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  {</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordflow">while</span>( length > 0 )</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  {</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  memcpy( temp, input, 8 );</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <a class="code" href="xtea_8h.html#a567fc0be7301210fa16f33a9062f71ed">xtea_crypt_ecb</a>( ctx, mode, input, output );</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> </div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keywordflow">for</span>( i = 0; i < 8; i++ )</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  output[i] = (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)( output[i] ^ iv[i] );</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> </div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  memcpy( iv, temp, 8 );</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> </div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  input += 8;</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  output += 8;</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  length -= 8;</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  }</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="keywordflow">else</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  {</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">while</span>( length > 0 )</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  {</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordflow">for</span>( i = 0; i < 8; i++ )</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  output[i] = (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)( input[i] ^ iv[i] );</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>  <a class="code" href="xtea_8h.html#a567fc0be7301210fa16f33a9062f71ed">xtea_crypt_ecb</a>( ctx, mode, output, output );</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  memcpy( iv, output, 8 );</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> </div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  input += 8;</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  output += 8;</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  length -= 8;</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  }</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  }</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> </div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> }</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CIPHER_MODE_CBC */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span> <span class="preprocessor"></span><span class="preprocessor">#endif </span><span class="comment">/* !POLARSSL_XTEA_ALT */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> <span class="preprocessor">#if defined(POLARSSL_SELF_TEST)</span></div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="preprocessor">#include <string.h></span></div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> </div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="comment"> * XTEA tests vectors (non-official)</span></div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> </div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> xtea_test_key[6][16] =</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span> {</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  0x0c, 0x0d, 0x0e, 0x0f },</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  0x0c, 0x0d, 0x0e, 0x0f },</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  0x0c, 0x0d, 0x0e, 0x0f },</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  0x00, 0x00, 0x00, 0x00 },</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  0x00, 0x00, 0x00, 0x00 },</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  0x00, 0x00, 0x00, 0x00 }</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span> };</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> </div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> xtea_test_pt[6][8] =</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span> {</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  { 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48 },</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  { 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 },</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  { 0x5a, 0x5b, 0x6e, 0x27, 0x89, 0x48, 0xd7, 0x7f },</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  { 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48 },</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  { 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 },</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  { 0x70, 0xe1, 0x22, 0x5d, 0x6e, 0x4e, 0x76, 0x55 }</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> };</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span> </div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> xtea_test_ct[6][8] =</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> {</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  { 0x49, 0x7d, 0xf3, 0xd0, 0x72, 0x61, 0x2c, 0xb5 },</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  { 0xe7, 0x8f, 0x2d, 0x13, 0x74, 0x43, 0x41, 0xd8 },</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  { 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 },</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  { 0xa0, 0x39, 0x05, 0x89, 0xf8, 0xb8, 0xef, 0xa5 },</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  { 0xed, 0x23, 0x37, 0x5a, 0x82, 0x1a, 0x8c, 0x2d },</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  { 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 }</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> };</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span> </div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> <span class="comment"> * Checkup routine</span></div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span> <span class="keywordtype">int</span> <a class="code" href="xtea_8h.html#a03b5858d119c1b2674612c2e94ece5f1">xtea_self_test</a>( <span class="keywordtype">int</span> verbose )</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> {</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keywordtype">int</span> i, ret = 0;</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> buf[8];</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <a class="code" href="structxtea__context.html">xtea_context</a> ctx;</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> </div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <a class="code" href="xtea_8h.html#a6e92b27a7301c5b521c13d844f06f0ab">xtea_init</a>( &ctx );</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keywordflow">for</span>( i = 0; i < 6; i++ )</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  {</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keywordflow">if</span>( verbose != 0 )</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <a class="code" href="test__suite__aes_8cbc_8c.html#afc6a7362c0f0c9cfa8fc76b3281e2b37">polarssl_printf</a>( <span class="stringliteral">" XTEA test #%d: "</span>, i + 1 );</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> </div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  memcpy( buf, xtea_test_pt[i], 8 );</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> </div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <a class="code" href="xtea_8h.html#af3dbab39c255385de39650070c1bbfa2">xtea_setup</a>( &ctx, xtea_test_key[i] );</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <a class="code" href="xtea_8h.html#a567fc0be7301210fa16f33a9062f71ed">xtea_crypt_ecb</a>( &ctx, <a class="code" href="xtea_8h.html#aa75a338c8b1485f3dcd52ff788312136">XTEA_ENCRYPT</a>, buf, buf );</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> </div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="keywordflow">if</span>( memcmp( buf, xtea_test_ct[i], 8 ) != 0 )</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  {</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="keywordflow">if</span>( verbose != 0 )</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <a class="code" href="test__suite__aes_8cbc_8c.html#afc6a7362c0f0c9cfa8fc76b3281e2b37">polarssl_printf</a>( <span class="stringliteral">"failed\n"</span> );</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span> </div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  ret = 1;</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordflow">goto</span> exit;</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  }</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> </div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keywordflow">if</span>( verbose != 0 )</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <a class="code" href="test__suite__aes_8cbc_8c.html#afc6a7362c0f0c9cfa8fc76b3281e2b37">polarssl_printf</a>( <span class="stringliteral">"passed\n"</span> );</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  }</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span> </div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keywordflow">if</span>( verbose != 0 )</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <a class="code" href="test__suite__aes_8cbc_8c.html#afc6a7362c0f0c9cfa8fc76b3281e2b37">polarssl_printf</a>( <span class="stringliteral">"\n"</span> );</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> </div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span> exit:</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <a class="code" href="xtea_8h.html#a51b6944567d78a15810ad74ca1603735">xtea_free</a>( &ctx );</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> </div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span> }</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span> </div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_SELF_TEST */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_XTEA_C */</span><span class="preprocessor"></span></div>
<div class="ttc" id="xtea_8h_html_a9c09eafcc6b5bacc7d3617daaf357727"><div class="ttname"><a href="xtea_8h.html#a9c09eafcc6b5bacc7d3617daaf357727">POLARSSL_ERR_XTEA_INVALID_INPUT_LENGTH</a></div><div class="ttdeci">#define POLARSSL_ERR_XTEA_INVALID_INPUT_LENGTH</div><div class="ttdoc">The data input has an invalid length. </div><div class="ttdef"><b>Definition:</b> <a href="xtea_8h_source.html#l00048">xtea.h:48</a></div></div>
<div class="ttc" id="test__suite__aes_8cbc_8c_html_afc6a7362c0f0c9cfa8fc76b3281e2b37"><div class="ttname"><a href="test__suite__aes_8cbc_8c.html#afc6a7362c0f0c9cfa8fc76b3281e2b37">polarssl_printf</a></div><div class="ttdeci">#define polarssl_printf</div><div class="ttdef"><b>Definition:</b> <a href="test__suite__aes_8cbc_8c_source.html#l00309">test_suite_aes.cbc.c:309</a></div></div>
<div class="ttc" id="xtea_8h_html_a51b6944567d78a15810ad74ca1603735"><div class="ttname"><a href="xtea_8h.html#a51b6944567d78a15810ad74ca1603735">xtea_free</a></div><div class="ttdeci">void xtea_free(xtea_context *ctx)</div><div class="ttdoc">Clear XTEA context. </div></div>
<div class="ttc" id="config_8h_html"><div class="ttname"><a href="config_8h.html">config.h</a></div><div class="ttdoc">Configuration options (set of defines) </div></div>
<div class="ttc" id="xtea_8h_html_a6e92b27a7301c5b521c13d844f06f0ab"><div class="ttname"><a href="xtea_8h.html#a6e92b27a7301c5b521c13d844f06f0ab">xtea_init</a></div><div class="ttdeci">void xtea_init(xtea_context *ctx)</div><div class="ttdoc">Initialize XTEA context. </div></div>
<div class="ttc" id="platform_8h_html"><div class="ttname"><a href="platform_8h.html">platform.h</a></div><div class="ttdoc">PolarSSL Platform abstraction layer. </div></div>
<div class="ttc" id="xtea_8h_html_a567fc0be7301210fa16f33a9062f71ed"><div class="ttname"><a href="xtea_8h.html#a567fc0be7301210fa16f33a9062f71ed">xtea_crypt_ecb</a></div><div class="ttdeci">int xtea_crypt_ecb(xtea_context *ctx, int mode, const unsigned char input[8], unsigned char output[8])</div><div class="ttdoc">XTEA cipher function. </div></div>
<div class="ttc" id="xtea_8h_html_af3dbab39c255385de39650070c1bbfa2"><div class="ttname"><a href="xtea_8h.html#af3dbab39c255385de39650070c1bbfa2">xtea_setup</a></div><div class="ttdeci">void xtea_setup(xtea_context *ctx, const unsigned char key[16])</div><div class="ttdoc">XTEA key schedule. </div></div>
<div class="ttc" id="test__suite__aes_8cbc_8c_html_a4671795996d0aae650c87a82bca7b880"><div class="ttname"><a href="test__suite__aes_8cbc_8c.html#a4671795996d0aae650c87a82bca7b880">PUT_UINT32_BE</a></div><div class="ttdeci">#define PUT_UINT32_BE(n, b, i)</div><div class="ttdef"><b>Definition:</b> <a href="test__suite__aes_8cbc_8c_source.html#l00049">test_suite_aes.cbc.c:49</a></div></div>
<div class="ttc" id="xtea_8h_html"><div class="ttname"><a href="xtea_8h.html">xtea.h</a></div><div class="ttdoc">XTEA block cipher (32-bit) </div></div>
<div class="ttc" id="xtea_8h_html_a12112dc96c2e7b6f1b6a5b38a9471c01"><div class="ttname"><a href="xtea_8h.html#a12112dc96c2e7b6f1b6a5b38a9471c01">XTEA_DECRYPT</a></div><div class="ttdeci">#define XTEA_DECRYPT</div><div class="ttdef"><b>Definition:</b> <a href="xtea_8h_source.html#l00046">xtea.h:46</a></div></div>
<div class="ttc" id="xtea_8h_html_aa75a338c8b1485f3dcd52ff788312136"><div class="ttname"><a href="xtea_8h.html#aa75a338c8b1485f3dcd52ff788312136">XTEA_ENCRYPT</a></div><div class="ttdeci">#define XTEA_ENCRYPT</div><div class="ttdef"><b>Definition:</b> <a href="xtea_8h_source.html#l00045">xtea.h:45</a></div></div>
<div class="ttc" id="xtea_8h_html_a51653f454cb805f026e9ce940d6f5bae"><div class="ttname"><a href="xtea_8h.html#a51653f454cb805f026e9ce940d6f5bae">xtea_crypt_cbc</a></div><div class="ttdeci">int xtea_crypt_cbc(xtea_context *ctx, int mode, size_t length, unsigned char iv[8], const unsigned char *input, unsigned char *output)</div><div class="ttdoc">XTEA CBC cipher function. </div></div>
<div class="ttc" id="test__suite__aes_8cbc_8c_html_a37e0e1a97807195e2de54fd6487751d3"><div class="ttname"><a href="test__suite__aes_8cbc_8c.html#a37e0e1a97807195e2de54fd6487751d3">GET_UINT32_BE</a></div><div class="ttdeci">#define GET_UINT32_BE(n, b, i)</div><div class="ttdef"><b>Definition:</b> <a href="test__suite__aes_8cbc_8c_source.html#l00039">test_suite_aes.cbc.c:39</a></div></div>
<div class="ttc" id="structxtea__context_html"><div class="ttname"><a href="structxtea__context.html">xtea_context</a></div><div class="ttdoc">XTEA context structure. </div><div class="ttdef"><b>Definition:</b> <a href="xtea_8h_source.html#l00061">xtea.h:61</a></div></div>
<div class="ttc" id="xtea_8h_html_a03b5858d119c1b2674612c2e94ece5f1"><div class="ttname"><a href="xtea_8h.html#a03b5858d119c1b2674612c2e94ece5f1">xtea_self_test</a></div><div class="ttdeci">int xtea_self_test(int verbose)</div><div class="ttdoc">Checkup routine. </div></div>
<div class="ttc" id="structxtea__context_html_a9f8d2371f6498f71eea654cf5483f9d6"><div class="ttname"><a href="structxtea__context.html#a9f8d2371f6498f71eea654cf5483f9d6">xtea_context::k</a></div><div class="ttdeci">uint32_t k[4]</div><div class="ttdef"><b>Definition:</b> <a href="xtea_8h_source.html#l00063">xtea.h:63</a></div></div>
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