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<a href="cipher_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> </div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#if !defined(POLARSSL_CONFIG_FILE)</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</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="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor"></span><span class="preprocessor">#include POLARSSL_CONFIG_FILE</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#if defined(POLARSSL_CIPHER_C)</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#include "<a class="code" href="cipher_8h.html">polarssl/cipher.h</a>"</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#include "<a class="code" href="cipher__wrap_8h.html">polarssl/cipher_wrap.h</a>"</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#if defined(POLARSSL_GCM_C)</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor"></span><span class="preprocessor">#include "<a class="code" href="gcm_8h.html">polarssl/gcm.h</a>"</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#if defined(POLARSSL_CCM_C)</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor"></span><span class="preprocessor">#include "<a class="code" href="ccm_8h.html">polarssl/ccm.h</a>"</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#include <stdlib.h></span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#if defined(POLARSSL_ARC4_C) || defined(POLARSSL_CIPHER_NULL_CIPHER)</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor"></span><span class="preprocessor">#define POLARSSL_CIPHER_MODE_STREAM</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor"></span><span class="preprocessor">#endif</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">#if defined(_MSC_VER) && !defined strcasecmp && !defined(EFIX64) && \</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor"> !defined(EFI32)</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor"></span><span class="preprocessor">#define strcasecmp _stricmp</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor"></span><span class="preprocessor">#endif</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="comment">/* Implementation that should never be optimized out by the compiler */</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</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="l00062"></a><span class="lineno"> 62</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="l00063"></a><span class="lineno"> 63</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="keyword">static</span> <span class="keywordtype">int</span> supported_init = 0;</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="keyword">const</span> <span class="keywordtype">int</span> *<a class="code" href="cipher_8h.html#a036719c5224e57cf8469ebf9daceb137">cipher_list</a>( <span class="keywordtype">void</span> )</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> {</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keyword">const</span> <a class="code" href="structcipher__definition__t.html">cipher_definition_t</a> *def;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordtype">int</span> *type;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">if</span>( ! supported_init )</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>  def = <a class="code" href="cipher__wrap_8h.html#a82a4254bbd88da3626267612e7054c2f">cipher_definitions</a>;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  type = <a class="code" href="cipher__wrap_8h.html#a66281692d5aea0e483bede9586e77616">supported_ciphers</a>;</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="keywordflow">while</span>( def-><a class="code" href="structcipher__definition__t.html#a7a5ac4f5a5a273eee1fc9a3e42bf16e0">type</a> != 0 )</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  *type++ = (*def++).type;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  *type = 0;</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>  supported_init = 1;</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="keywordflow">return</span>( <a class="code" href="cipher__wrap_8h.html#a66281692d5aea0e483bede9586e77616">supported_ciphers</a> );</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> }</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">const</span> <a class="code" href="structcipher__info__t.html">cipher_info_t</a> *<a class="code" href="cipher_8h.html#a1a6dfa43a6758eb075dd2eb86b538900">cipher_info_from_type</a>( <span class="keyword">const</span> <a class="code" href="cipher_8h.html#a806c82ed7e8b591dedc86093f38274e6">cipher_type_t</a> cipher_type )</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="keyword">const</span> <a class="code" href="structcipher__definition__t.html">cipher_definition_t</a> *def;</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>  <span class="keywordflow">for</span>( def = <a class="code" href="cipher__wrap_8h.html#a82a4254bbd88da3626267612e7054c2f">cipher_definitions</a>; def-><a class="code" href="structcipher__definition__t.html#a5139461b26e070d9f939800be811c0cf">info</a> != NULL; def++ )</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordflow">if</span>( def-><a class="code" href="structcipher__definition__t.html#a7a5ac4f5a5a273eee1fc9a3e42bf16e0">type</a> == cipher_type )</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">return</span>( def-><a class="code" href="structcipher__definition__t.html#a5139461b26e070d9f939800be811c0cf">info</a> );</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>  <span class="keywordflow">return</span>( NULL );</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> <span class="keyword">const</span> <a class="code" href="structcipher__info__t.html">cipher_info_t</a> *<a class="code" href="cipher_8h.html#a76763329d5579d862dfca01adf32c05b">cipher_info_from_string</a>( <span class="keyword">const</span> <span class="keywordtype">char</span> *cipher_name )</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> {</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keyword">const</span> <a class="code" href="structcipher__definition__t.html">cipher_definition_t</a> *def;</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> </div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">if</span>( NULL == cipher_name )</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">return</span>( NULL );</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="keywordflow">for</span>( def = <a class="code" href="cipher__wrap_8h.html#a82a4254bbd88da3626267612e7054c2f">cipher_definitions</a>; def-><a class="code" href="structcipher__definition__t.html#a5139461b26e070d9f939800be811c0cf">info</a> != NULL; def++ )</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">if</span>( ! strcasecmp( def-><a class="code" href="structcipher__definition__t.html#a5139461b26e070d9f939800be811c0cf">info</a>-><a class="code" href="structcipher__info__t.html#a9b189d0ce9de3eada6b874f1ce8a7393">name</a>, cipher_name ) )</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">return</span>( def-><a class="code" href="structcipher__definition__t.html#a5139461b26e070d9f939800be811c0cf">info</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>  <span class="keywordflow">return</span>( NULL );</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> }</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">const</span> <a class="code" href="structcipher__info__t.html">cipher_info_t</a> *<a class="code" href="cipher_8h.html#a68fd6a4ea2c236dc4abcad76d73d5cac">cipher_info_from_values</a>( <span class="keyword">const</span> <a class="code" href="cipher_8h.html#a373f5d3a0a42c77ff4f5fe4fe7da0560">cipher_id_t</a> cipher_id,</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordtype">int</span> key_length,</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keyword">const</span> <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179c">cipher_mode_t</a> mode )</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="keyword">const</span> <a class="code" href="structcipher__definition__t.html">cipher_definition_t</a> *def;</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>  <span class="keywordflow">for</span>( def = <a class="code" href="cipher__wrap_8h.html#a82a4254bbd88da3626267612e7054c2f">cipher_definitions</a>; def-><a class="code" href="structcipher__definition__t.html#a5139461b26e070d9f939800be811c0cf">info</a> != NULL; def++ )</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">if</span>( def-><a class="code" href="structcipher__definition__t.html#a5139461b26e070d9f939800be811c0cf">info</a>-><a class="code" href="structcipher__info__t.html#a12c80723dd2c354ff5596b0931d4fedb">base</a>-><a class="code" href="structcipher__base__t.html#a539b9bf80fc122393affcc4cf8e1d3cc">cipher</a> == cipher_id &&</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  def-><a class="code" href="structcipher__definition__t.html#a5139461b26e070d9f939800be811c0cf">info</a>-><a class="code" href="structcipher__info__t.html#a2a22ee6e5c529e10cbe6225d71460b26">key_length</a> == (<span class="keywordtype">unsigned</span>) key_length &&</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  def-><a class="code" href="structcipher__definition__t.html#a5139461b26e070d9f939800be811c0cf">info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> == mode )</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">return</span>( def-><a class="code" href="structcipher__definition__t.html#a5139461b26e070d9f939800be811c0cf">info</a> );</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> </div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordflow">return</span>( NULL );</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> }</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="keywordtype">void</span> <a class="code" href="cipher_8h.html#a6a719708dc3b2f0d0e7beadccf871f4f">cipher_init</a>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> *ctx )</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>  memset( ctx, 0, <span class="keyword">sizeof</span>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> ) );</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> }</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="keywordtype">void</span> <a class="code" href="cipher_8h.html#af27f8e4cd1fab59615c3d73c69d136c8">cipher_free</a>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> *ctx )</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>  <span class="keywordflow">if</span>( ctx == NULL )</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> </div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordflow">if</span>( ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a> )</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a12c80723dd2c354ff5596b0931d4fedb">base</a>-><a class="code" href="structcipher__base__t.html#a8066218dfde7c5207d9b50458ee81ca6">ctx_free_func</a>( ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a> );</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>  polarssl_zeroize( ctx, <span class="keyword">sizeof</span>(<a class="code" href="structcipher__context__t.html">cipher_context_t</a>) );</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> }</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> </div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="keywordtype">int</span> <a class="code" href="cipher_8h.html#adc7c37e925193805884085ca87587f64">cipher_init_ctx</a>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> *ctx, <span class="keyword">const</span> <a class="code" href="structcipher__info__t.html">cipher_info_t</a> *cipher_info )</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> {</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keywordflow">if</span>( NULL == cipher_info || NULL == ctx )</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> </div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  memset( ctx, 0, <span class="keyword">sizeof</span>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> ) );</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> </div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">if</span>( NULL == ( ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a> = cipher_info-><a class="code" href="structcipher__info__t.html#a12c80723dd2c354ff5596b0931d4fedb">base</a>-><a class="code" href="structcipher__base__t.html#a91741724a7a4e396e4a946d6d4f713c1">ctx_alloc_func</a>() ) )</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#ab4d8385421d4fb4a71f2a00734487688">POLARSSL_ERR_CIPHER_ALLOC_FAILED</a> );</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a> = cipher_info;</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="preprocessor">#if defined(POLARSSL_CIPHER_MODE_WITH_PADDING)</span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="preprocessor"></span> <span class="comment">/*</span></div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment"> * Ignore possible errors caused by a cipher mode that doesn't use padding</span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="preprocessor">#if defined(POLARSSL_CIPHER_PADDING_PKCS7)</span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="preprocessor"></span> (void) <a class="code" href="cipher_8h.html#abbc809fe32e1cce35834006d1edf1f2c">cipher_set_padding_mode</a>( ctx, <a class="code" href="cipher_8h.html#acb17eb5d2106ba020a20b70d878aa7dda4a67d6bf4aec45912ee66f37a3cbb8a8">POLARSSL_PADDING_PKCS7</a> );</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="preprocessor"></span> (void) <a class="code" href="cipher_8h.html#abbc809fe32e1cce35834006d1edf1f2c">cipher_set_padding_mode</a>( ctx, <a class="code" href="cipher_8h.html#acb17eb5d2106ba020a20b70d878aa7ddaae558f0b4d848f4a29f0fae3fedbcf99">POLARSSL_PADDING_NONE</a> );</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="preprocessor"></span><span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CIPHER_MODE_WITH_PADDING */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> }</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> </div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="comment">/* Deprecated, redirects to cipher_free() */</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="keywordtype">int</span> <a class="code" href="cipher_8h.html#ac8abe3c96c800481697cfe8260cf829d">cipher_free_ctx</a>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> *ctx )</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>  <a class="code" href="cipher_8h.html#af27f8e4cd1fab59615c3d73c69d136c8">cipher_free</a>( ctx );</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">return</span>( 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> </div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="keywordtype">int</span> <a class="code" href="cipher_8h.html#a77355bddf2d69f68d55e2bd2374e9257">cipher_setkey</a>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> *ctx, <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *key,</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keywordtype">int</span> key_length, <span class="keyword">const</span> <a class="code" href="cipher_8h.html#a76a810650461f2062938ee9b82666b36">operation_t</a> operation )</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> {</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keywordflow">if</span>( NULL == ctx || NULL == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a> )</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> </div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordflow">if</span>( ( ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#ab3a9f706fa42f9a43a0e8d50ac54a959">flags</a> & <a class="code" href="cipher_8h.html#a49772688b048b1048944402c3429bf41">POLARSSL_CIPHER_VARIABLE_KEY_LEN</a> ) == 0 &&</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  (<span class="keywordtype">int</span>) ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a2a22ee6e5c529e10cbe6225d71460b26">key_length</a> != key_length )</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>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</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> </div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  ctx-><a class="code" href="structcipher__context__t.html#ab101b4f205022bb29b5aa3e46ba9c79f">key_length</a> = key_length;</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  ctx-><a class="code" href="structcipher__context__t.html#a621cd7faaf726b227e2ad58e8b7b755d">operation</a> = operation;</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span> </div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> <span class="comment"> * For CFB and CTR mode always use the encryption key schedule</span></div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keywordflow">if</span>( <a class="code" href="cipher_8h.html#a76a810650461f2062938ee9b82666b36ad8e41c0d381b23d7835dd322e511564f">POLARSSL_ENCRYPT</a> == operation ||</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179cafea74e56f89fafd334db1f5cb850e913">POLARSSL_MODE_CFB</a> == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> ||</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179ca9c7b9959c0a1b08bed57d40edc27ffe9">POLARSSL_MODE_CTR</a> == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> )</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  {</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">return</span> ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a12c80723dd2c354ff5596b0931d4fedb">base</a>-><a class="code" href="structcipher__base__t.html#a408d1cfbdf0e392052223e32dec2be3a">setkey_enc_func</a>( ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a>, key,</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  ctx-><a class="code" href="structcipher__context__t.html#ab101b4f205022bb29b5aa3e46ba9c79f">key_length</a> );</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> </div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keywordflow">if</span>( <a class="code" href="cipher_8h.html#a76a810650461f2062938ee9b82666b36ae99cd4d55b496dbb74727f7a6ed872c7">POLARSSL_DECRYPT</a> == operation )</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keywordflow">return</span> ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a12c80723dd2c354ff5596b0931d4fedb">base</a>-><a class="code" href="structcipher__base__t.html#ad6e8bdd1fe87bc2fc1d83d5b84900d1f">setkey_dec_func</a>( ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a>, key,</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  ctx-><a class="code" href="structcipher__context__t.html#ab101b4f205022bb29b5aa3e46ba9c79f">key_length</a> );</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> </div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span> }</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span> <span class="keywordtype">int</span> <a class="code" href="cipher_8h.html#abca5954bfff4e62c5280267d2a97171d">cipher_set_iv</a>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> *ctx,</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *iv, <span class="keywordtype">size_t</span> iv_len )</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> {</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keywordtype">size_t</span> actual_iv_size;</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span> </div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordflow">if</span>( NULL == ctx || NULL == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a> || NULL == iv )</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</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="comment">/* avoid buffer overflow in ctx->iv */</span></div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordflow">if</span>( iv_len > <a class="code" href="cipher_8h.html#aded691b9d905920d9675e7b9828a237c">POLARSSL_MAX_IV_LENGTH</a> )</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a8625e259f484845e8fe6103f14f14f85">POLARSSL_ERR_CIPHER_FEATURE_UNAVAILABLE</a> );</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> </div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keywordflow">if</span>( ( ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#ab3a9f706fa42f9a43a0e8d50ac54a959">flags</a> & <a class="code" href="cipher_8h.html#af1930bcb6327197ff0980aed8bfc3736">POLARSSL_CIPHER_VARIABLE_IV_LEN</a> ) != 0 )</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  actual_iv_size = iv_len;</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  {</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  actual_iv_size = ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#ae8fde413dc240da60f4062c3138eec0a">iv_size</a>;</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="comment">/* avoid reading past the end of input buffer */</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keywordflow">if</span>( actual_iv_size > iv_len )</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  }</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> </div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  memcpy( ctx-><a class="code" href="structcipher__context__t.html#ade41d48b148134eebae1e5801b0cf426">iv</a>, iv, actual_iv_size );</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  ctx-><a class="code" href="structcipher__context__t.html#a124f269c0d3b1ce1a74f5dcacf69b688">iv_size</a> = actual_iv_size;</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> </div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keywordflow">return</span>( 0 );</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> </div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> <span class="keywordtype">int</span> <a class="code" href="cipher_8h.html#a0a55a8eeae5ebb2627c59257ffb202bc">cipher_reset</a>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> *ctx )</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> {</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keywordflow">if</span>( NULL == ctx || NULL == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a> )</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span> </div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a> = 0;</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> </div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> }</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> </div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="preprocessor">#if defined(POLARSSL_GCM_C)</span></div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> <span class="preprocessor"></span><span class="keywordtype">int</span> <a class="code" href="cipher_8h.html#a5b8cb1cff4b19e01849c84c67364500d">cipher_update_ad</a>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> *ctx,</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *ad, <span class="keywordtype">size_t</span> ad_len )</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>  <span class="keywordflow">if</span>( NULL == ctx || NULL == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a> )</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> </div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordflow">if</span>( <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179ca45d7a269317fef5880d5ae9c6dae13f9">POLARSSL_MODE_GCM</a> == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> )</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">return</span> <a class="code" href="gcm_8h.html#a44f5d26e87eda4ef3fd6ca33bdddc17a">gcm_starts</a>( (<a class="code" href="structgcm__context.html">gcm_context</a> *) ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a>, ctx-><a class="code" href="structcipher__context__t.html#a621cd7faaf726b227e2ad58e8b7b755d">operation</a>,</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  ctx-><a class="code" href="structcipher__context__t.html#ade41d48b148134eebae1e5801b0cf426">iv</a>, ctx-><a class="code" href="structcipher__context__t.html#a124f269c0d3b1ce1a74f5dcacf69b688">iv_size</a>, ad, ad_len );</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  }</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> </div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> }</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_GCM_C */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> <span class="keywordtype">int</span> <a class="code" href="cipher_8h.html#afca62e9b6e95da3a46fa6c95f0a09e38">cipher_update</a>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> *ctx, <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *input,</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keywordtype">size_t</span> ilen, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *output, <span class="keywordtype">size_t</span> *olen )</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span> {</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordtype">int</span> ret;</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>( NULL == ctx || NULL == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a> || NULL == olen )</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  {</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  }</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span> </div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  *olen = 0;</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> </div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="keywordflow">if</span>( ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> == <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179caaefd6ed34c1992d638129e161b28084a">POLARSSL_MODE_ECB</a> )</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="keywordflow">if</span>( ilen != <a class="code" href="cipher_8h.html#ac3ffcee4725c03638726f7211b31bcb7">cipher_get_block_size</a>( ctx ) )</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#ae92e3caeb14ac7b0a3ac63aa49d88e9e">POLARSSL_ERR_CIPHER_FULL_BLOCK_EXPECTED</a> );</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> </div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  *olen = ilen;</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> </div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keywordflow">if</span>( 0 != ( ret = ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a12c80723dd2c354ff5596b0931d4fedb">base</a>-><a class="code" href="structcipher__base__t.html#af6992411c58361334758dfa5caeac2c1">ecb_func</a>( ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a>,</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  ctx-><a class="code" href="structcipher__context__t.html#a621cd7faaf726b227e2ad58e8b7b755d">operation</a>, input, output ) ) )</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  {</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  }</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span> </div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  }</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> </div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span> <span class="preprocessor">#if defined(POLARSSL_GCM_C)</span></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> == <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179ca45d7a269317fef5880d5ae9c6dae13f9">POLARSSL_MODE_GCM</a> )</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  {</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  *olen = ilen;</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keywordflow">return</span> <a class="code" href="gcm_8h.html#ac27c1ae819964e256ad31076bf8be0ac">gcm_update</a>( (<a class="code" href="structgcm__context.html">gcm_context</a> *) ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a>, ilen, input,</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  output );</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  }</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  <span class="keywordflow">if</span>( input == output &&</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  ( ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a> != 0 || ilen % <a class="code" href="cipher_8h.html#ac3ffcee4725c03638726f7211b31bcb7">cipher_get_block_size</a>( ctx ) ) )</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  {</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  }</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span> </div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> <span class="preprocessor">#if defined(POLARSSL_CIPHER_MODE_CBC)</span></div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> == <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179cabc642c3486ec5224ef3c13e53fc941d0">POLARSSL_MODE_CBC</a> )</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  {</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="keywordtype">size_t</span> copy_len = 0;</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span> </div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> <span class="comment"> * If there is not enough data for a full block, cache it.</span></div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="keywordflow">if</span>( ( ctx-><a class="code" href="structcipher__context__t.html#a621cd7faaf726b227e2ad58e8b7b755d">operation</a> == <a class="code" href="cipher_8h.html#a76a810650461f2062938ee9b82666b36ae99cd4d55b496dbb74727f7a6ed872c7">POLARSSL_DECRYPT</a> &&</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  ilen + ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a> <= <a class="code" href="cipher_8h.html#ac3ffcee4725c03638726f7211b31bcb7">cipher_get_block_size</a>( ctx ) ) ||</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  ( ctx-><a class="code" href="structcipher__context__t.html#a621cd7faaf726b227e2ad58e8b7b755d">operation</a> == <a class="code" href="cipher_8h.html#a76a810650461f2062938ee9b82666b36ad8e41c0d381b23d7835dd322e511564f">POLARSSL_ENCRYPT</a> &&</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  ilen + ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a> < <a class="code" href="cipher_8h.html#ac3ffcee4725c03638726f7211b31bcb7">cipher_get_block_size</a>( ctx ) ) )</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  {</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  memcpy( &( ctx-><a class="code" href="structcipher__context__t.html#a972bc531a9d9b7779d42c433157ac908">unprocessed_data</a>[ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a>] ), input,</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  ilen );</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span> </div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a> += ilen;</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  }</div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span> </div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span> <span class="comment"> * Process cached data first</span></div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keywordflow">if</span>( ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a> != 0 )</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  {</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  copy_len = <a class="code" href="cipher_8h.html#ac3ffcee4725c03638726f7211b31bcb7">cipher_get_block_size</a>( ctx ) - ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a>;</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span> </div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  memcpy( &( ctx-><a class="code" href="structcipher__context__t.html#a972bc531a9d9b7779d42c433157ac908">unprocessed_data</a>[ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a>] ), input,</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  copy_len );</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span> </div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="keywordflow">if</span>( 0 != ( ret = ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a12c80723dd2c354ff5596b0931d4fedb">base</a>-><a class="code" href="structcipher__base__t.html#a72fe8be6c0c358fa81953db9251d482e">cbc_func</a>( ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a>,</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  ctx-><a class="code" href="structcipher__context__t.html#a621cd7faaf726b227e2ad58e8b7b755d">operation</a>, <a class="code" href="cipher_8h.html#ac3ffcee4725c03638726f7211b31bcb7">cipher_get_block_size</a>( ctx ), ctx-><a class="code" href="structcipher__context__t.html#ade41d48b148134eebae1e5801b0cf426">iv</a>,</div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  ctx-><a class="code" href="structcipher__context__t.html#a972bc531a9d9b7779d42c433157ac908">unprocessed_data</a>, output ) ) )</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  {</div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  }</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span> </div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  *olen += <a class="code" href="cipher_8h.html#ac3ffcee4725c03638726f7211b31bcb7">cipher_get_block_size</a>( ctx );</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  output += <a class="code" href="cipher_8h.html#ac3ffcee4725c03638726f7211b31bcb7">cipher_get_block_size</a>( ctx );</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a> = 0;</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span> </div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  input += copy_len;</div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  ilen -= copy_len;</div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  }</div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> </div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span> <span class="comment"> * Cache final, incomplete block</span></div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <span class="keywordflow">if</span>( 0 != ilen )</div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  {</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  copy_len = ilen % <a class="code" href="cipher_8h.html#ac3ffcee4725c03638726f7211b31bcb7">cipher_get_block_size</a>( ctx );</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="keywordflow">if</span>( copy_len == 0 && ctx-><a class="code" href="structcipher__context__t.html#a621cd7faaf726b227e2ad58e8b7b755d">operation</a> == <a class="code" href="cipher_8h.html#a76a810650461f2062938ee9b82666b36ae99cd4d55b496dbb74727f7a6ed872c7">POLARSSL_DECRYPT</a> )</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  copy_len = <a class="code" href="cipher_8h.html#ac3ffcee4725c03638726f7211b31bcb7">cipher_get_block_size</a>( ctx );</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span> </div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  memcpy( ctx-><a class="code" href="structcipher__context__t.html#a972bc531a9d9b7779d42c433157ac908">unprocessed_data</a>, &( input[ilen - copy_len] ),</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  copy_len );</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span> </div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a> += copy_len;</div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  ilen -= copy_len;</div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  }</div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span> </div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span> <span class="comment"> * Process remaining full blocks</span></div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keywordflow">if</span>( ilen )</div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  {</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  <span class="keywordflow">if</span>( 0 != ( ret = ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a12c80723dd2c354ff5596b0931d4fedb">base</a>-><a class="code" href="structcipher__base__t.html#a72fe8be6c0c358fa81953db9251d482e">cbc_func</a>( ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a>,</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  ctx-><a class="code" href="structcipher__context__t.html#a621cd7faaf726b227e2ad58e8b7b755d">operation</a>, ilen, ctx-><a class="code" href="structcipher__context__t.html#ade41d48b148134eebae1e5801b0cf426">iv</a>, input, output ) ) )</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  {</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  }</div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span> </div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  *olen += ilen;</div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  }</div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span> </div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  }</div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CIPHER_MODE_CBC */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span> <span class="preprocessor">#if defined(POLARSSL_CIPHER_MODE_CFB)</span></div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> == <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179cafea74e56f89fafd334db1f5cb850e913">POLARSSL_MODE_CFB</a> )</div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  {</div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  <span class="keywordflow">if</span>( 0 != ( ret = ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a12c80723dd2c354ff5596b0931d4fedb">base</a>-><a class="code" href="structcipher__base__t.html#af6c613d58788fe5a9b52268a63f8b7fc">cfb_func</a>( ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a>,</div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  ctx-><a class="code" href="structcipher__context__t.html#a621cd7faaf726b227e2ad58e8b7b755d">operation</a>, ilen, &ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a>, ctx-><a class="code" href="structcipher__context__t.html#ade41d48b148134eebae1e5801b0cf426">iv</a>,</div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  input, output ) ) )</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  {</div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  }</div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span> </div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  *olen = ilen;</div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span> </div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  }</div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CIPHER_MODE_CFB */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span> <span class="preprocessor">#if defined(POLARSSL_CIPHER_MODE_CTR)</span></div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> == <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179ca9c7b9959c0a1b08bed57d40edc27ffe9">POLARSSL_MODE_CTR</a> )</div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  {</div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <span class="keywordflow">if</span>( 0 != ( ret = ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a12c80723dd2c354ff5596b0931d4fedb">base</a>-><a class="code" href="structcipher__base__t.html#a52cf7e0f45be977a86dce9df04a38efa">ctr_func</a>( ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a>,</div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  ilen, &ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a>, ctx-><a class="code" href="structcipher__context__t.html#ade41d48b148134eebae1e5801b0cf426">iv</a>,</div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  ctx-><a class="code" href="structcipher__context__t.html#a972bc531a9d9b7779d42c433157ac908">unprocessed_data</a>, input, output ) ) )</div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  {</div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  }</div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span> </div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  *olen = ilen;</div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span> </div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  }</div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CIPHER_MODE_CTR */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span> <span class="preprocessor">#if defined(POLARSSL_CIPHER_MODE_STREAM)</span></div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> == <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179caf460bee5fb0bf8b383a1fe23099b6707">POLARSSL_MODE_STREAM</a> )</div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  {</div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  <span class="keywordflow">if</span>( 0 != ( ret = ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a12c80723dd2c354ff5596b0931d4fedb">base</a>-><a class="code" href="structcipher__base__t.html#a2f751a12e583a0c1bdf4e35376e1a79b">stream_func</a>( ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a>,</div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  ilen, input, output ) ) )</div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  {</div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  }</div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span> </div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  *olen = ilen;</div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span> </div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  }</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CIPHER_MODE_STREAM */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a8625e259f484845e8fe6103f14f14f85">POLARSSL_ERR_CIPHER_FEATURE_UNAVAILABLE</a> );</div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span> }</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span> </div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span> <span class="preprocessor">#if defined(POLARSSL_CIPHER_MODE_WITH_PADDING)</span></div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span> <span class="preprocessor"></span><span class="preprocessor">#if defined(POLARSSL_CIPHER_PADDING_PKCS7)</span></div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span> <span class="preprocessor"></span><span class="comment">/*</span></div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span> <span class="comment"> * PKCS7 (and PKCS5) padding: fill with ll bytes, with ll = padding_len</span></div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span> <span class="keyword">static</span> <span class="keywordtype">void</span> add_pkcs_padding( <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *output, <span class="keywordtype">size_t</span> output_len,</div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  <span class="keywordtype">size_t</span> data_len )</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span> {</div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  <span class="keywordtype">size_t</span> padding_len = output_len - data_len;</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> i;</div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span> </div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  <span class="keywordflow">for</span>( i = 0; i < padding_len; i++ )</div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  output[data_len + i] = (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>) padding_len;</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span> }</div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span> </div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span> <span class="keyword">static</span> <span class="keywordtype">int</span> get_pkcs_padding( <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *input, <span class="keywordtype">size_t</span> input_len,</div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  <span class="keywordtype">size_t</span> *data_len )</div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span> {</div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  <span class="keywordtype">size_t</span> i, pad_idx;</div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> padding_len, bad = 0;</div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span> </div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  <span class="keywordflow">if</span>( NULL == input || NULL == data_len )</div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span> </div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  padding_len = input[input_len - 1];</div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  *data_len = input_len - padding_len;</div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span> </div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <span class="comment">/* Avoid logical || since it results in a branch */</span></div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  bad |= padding_len > input_len;</div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  bad |= padding_len == 0;</div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span> </div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  <span class="comment">/* The number of bytes checked must be independent of padding_len,</span></div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span> <span class="comment"> * so pick input_len, which is usually 8 or 16 (one block) */</span></div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  pad_idx = input_len - padding_len;</div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  <span class="keywordflow">for</span>( i = 0; i < input_len; i++ )</div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  bad |= ( input[i] ^ padding_len ) * ( i >= pad_idx );</div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span> </div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a87777f84d48de3a0d48b252d85c8adc3">POLARSSL_ERR_CIPHER_INVALID_PADDING</a> * ( bad != 0 ) );</div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span> }</div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CIPHER_PADDING_PKCS7 */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span> <span class="preprocessor">#if defined(POLARSSL_CIPHER_PADDING_ONE_AND_ZEROS)</span></div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span> <span class="preprocessor"></span><span class="comment">/*</span></div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span> <span class="comment"> * One and zeros padding: fill with 80 00 ... 00</span></div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span> <span class="keyword">static</span> <span class="keywordtype">void</span> add_one_and_zeros_padding( <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *output,</div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  <span class="keywordtype">size_t</span> output_len, <span class="keywordtype">size_t</span> data_len )</div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span> {</div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  <span class="keywordtype">size_t</span> padding_len = output_len - data_len;</div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> i = 0;</div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span> </div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  output[data_len] = 0x80;</div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  <span class="keywordflow">for</span>( i = 1; i < padding_len; i++ )</div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  output[data_len + i] = 0x00;</div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span> }</div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span> </div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span> <span class="keyword">static</span> <span class="keywordtype">int</span> get_one_and_zeros_padding( <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *input, <span class="keywordtype">size_t</span> input_len,</div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  <span class="keywordtype">size_t</span> *data_len )</div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span> {</div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  <span class="keywordtype">size_t</span> i;</div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> done = 0, prev_done, bad;</div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span> </div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="keywordflow">if</span>( NULL == input || NULL == data_len )</div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span> </div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  bad = 0xFF;</div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  *data_len = 0;</div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  <span class="keywordflow">for</span>( i = input_len; i > 0; i-- )</div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  {</div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  prev_done = done;</div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  done |= ( input[i-1] != 0 );</div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  *data_len |= ( i - 1 ) * ( done != prev_done );</div>
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  bad &= ( input[i-1] ^ 0x80 ) | ( done == prev_done );</div>
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  }</div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span> </div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a87777f84d48de3a0d48b252d85c8adc3">POLARSSL_ERR_CIPHER_INVALID_PADDING</a> * ( bad != 0 ) );</div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span> </div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span> }</div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CIPHER_PADDING_ONE_AND_ZEROS */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span> <span class="preprocessor">#if defined(POLARSSL_CIPHER_PADDING_ZEROS_AND_LEN)</span></div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span> <span class="preprocessor"></span><span class="comment">/*</span></div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span> <span class="comment"> * Zeros and len padding: fill with 00 ... 00 ll, where ll is padding length</span></div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span> <span class="keyword">static</span> <span class="keywordtype">void</span> add_zeros_and_len_padding( <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *output,</div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  <span class="keywordtype">size_t</span> output_len, <span class="keywordtype">size_t</span> data_len )</div>
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span> {</div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  <span class="keywordtype">size_t</span> padding_len = output_len - data_len;</div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> i = 0;</div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span> </div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  <span class="keywordflow">for</span>( i = 1; i < padding_len; i++ )</div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  output[data_len + i - 1] = 0x00;</div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  output[output_len - 1] = (<span class="keywordtype">unsigned</span> char) padding_len;</div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span> }</div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span> </div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span> <span class="keyword">static</span> <span class="keywordtype">int</span> get_zeros_and_len_padding( <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *input, <span class="keywordtype">size_t</span> input_len,</div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  <span class="keywordtype">size_t</span> *data_len )</div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span> {</div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  <span class="keywordtype">size_t</span> i, pad_idx;</div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> padding_len, bad = 0;</div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span> </div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  <span class="keywordflow">if</span>( NULL == input || NULL == data_len )</div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span> </div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  padding_len = input[input_len - 1];</div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  *data_len = input_len - padding_len;</div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span> </div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  <span class="comment">/* Avoid logical || since it results in a branch */</span></div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  bad |= padding_len > input_len;</div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  bad |= padding_len == 0;</div>
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span> </div>
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  <span class="comment">/* The number of bytes checked must be independent of padding_len */</span></div>
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  pad_idx = input_len - padding_len;</div>
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  <span class="keywordflow">for</span>( i = 0; i < input_len - 1; i++ )</div>
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  bad |= input[i] * ( i >= pad_idx );</div>
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span> </div>
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a87777f84d48de3a0d48b252d85c8adc3">POLARSSL_ERR_CIPHER_INVALID_PADDING</a> * ( bad != 0 ) );</div>
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span> }</div>
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CIPHER_PADDING_ZEROS_AND_LEN */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span> <span class="preprocessor">#if defined(POLARSSL_CIPHER_PADDING_ZEROS)</span></div>
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span> <span class="preprocessor"></span><span class="comment">/*</span></div>
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span> <span class="comment"> * Zero padding: fill with 00 ... 00</span></div>
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span> <span class="keyword">static</span> <span class="keywordtype">void</span> add_zeros_padding( <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *output,</div>
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  <span class="keywordtype">size_t</span> output_len, <span class="keywordtype">size_t</span> data_len )</div>
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span> {</div>
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  <span class="keywordtype">size_t</span> i;</div>
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span> </div>
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  <span class="keywordflow">for</span>( i = data_len; i < output_len; i++ )</div>
<div class="line"><a name="l00569"></a><span class="lineno"> 569</span>  output[i] = 0x00;</div>
<div class="line"><a name="l00570"></a><span class="lineno"> 570</span> }</div>
<div class="line"><a name="l00571"></a><span class="lineno"> 571</span> </div>
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span> <span class="keyword">static</span> <span class="keywordtype">int</span> get_zeros_padding( <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *input, <span class="keywordtype">size_t</span> input_len,</div>
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  <span class="keywordtype">size_t</span> *data_len )</div>
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span> {</div>
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  <span class="keywordtype">size_t</span> i;</div>
<div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> done = 0, prev_done;</div>
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span> </div>
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  <span class="keywordflow">if</span>( NULL == input || NULL == data_len )</div>
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span> </div>
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  *data_len = 0;</div>
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  <span class="keywordflow">for</span>( i = input_len; i > 0; i-- )</div>
<div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  {</div>
<div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  prev_done = done;</div>
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  done |= ( input[i-1] != 0 );</div>
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  *data_len |= i * ( done != prev_done );</div>
<div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  }</div>
<div class="line"><a name="l00588"></a><span class="lineno"> 588</span> </div>
<div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00590"></a><span class="lineno"> 590</span> }</div>
<div class="line"><a name="l00591"></a><span class="lineno"> 591</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CIPHER_PADDING_ZEROS */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00592"></a><span class="lineno"> 592</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00593"></a><span class="lineno"> 593</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00594"></a><span class="lineno"> 594</span> <span class="comment"> * No padding: don't pad :)</span></div>
<div class="line"><a name="l00595"></a><span class="lineno"> 595</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00596"></a><span class="lineno"> 596</span> <span class="comment"> * There is no add_padding function (check for NULL in cipher_finish)</span></div>
<div class="line"><a name="l00597"></a><span class="lineno"> 597</span> <span class="comment"> * but a trivial get_padding function</span></div>
<div class="line"><a name="l00598"></a><span class="lineno"> 598</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span> <span class="keyword">static</span> <span class="keywordtype">int</span> get_no_padding( <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *input, <span class="keywordtype">size_t</span> input_len,</div>
<div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  <span class="keywordtype">size_t</span> *data_len )</div>
<div class="line"><a name="l00601"></a><span class="lineno"> 601</span> {</div>
<div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  <span class="keywordflow">if</span>( NULL == input || NULL == data_len )</div>
<div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00604"></a><span class="lineno"> 604</span> </div>
<div class="line"><a name="l00605"></a><span class="lineno"> 605</span>  *data_len = input_len;</div>
<div class="line"><a name="l00606"></a><span class="lineno"> 606</span> </div>
<div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span> }</div>
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CIPHER_MODE_WITH_PADDING */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span> <span class="keywordtype">int</span> <a class="code" href="cipher_8h.html#a12a036b9caa428f47dfb14c06753f14c">cipher_finish</a>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> *ctx,</div>
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *output, <span class="keywordtype">size_t</span> *olen )</div>
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span> {</div>
<div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  <span class="keywordflow">if</span>( NULL == ctx || NULL == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a> || NULL == olen )</div>
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span> </div>
<div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  *olen = 0;</div>
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span> </div>
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  <span class="keywordflow">if</span>( <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179cafea74e56f89fafd334db1f5cb850e913">POLARSSL_MODE_CFB</a> == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> ||</div>
<div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179ca9c7b9959c0a1b08bed57d40edc27ffe9">POLARSSL_MODE_CTR</a> == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> ||</div>
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179ca45d7a269317fef5880d5ae9c6dae13f9">POLARSSL_MODE_GCM</a> == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> ||</div>
<div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179caf460bee5fb0bf8b383a1fe23099b6707">POLARSSL_MODE_STREAM</a> == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> )</div>
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  {</div>
<div class="line"><a name="l00624"></a><span class="lineno"> 624</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  }</div>
<div class="line"><a name="l00626"></a><span class="lineno"> 626</span> </div>
<div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  <span class="keywordflow">if</span>( <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179caaefd6ed34c1992d638129e161b28084a">POLARSSL_MODE_ECB</a> == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> )</div>
<div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  {</div>
<div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  <span class="keywordflow">if</span>( ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a> != 0 )</div>
<div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#ae92e3caeb14ac7b0a3ac63aa49d88e9e">POLARSSL_ERR_CIPHER_FULL_BLOCK_EXPECTED</a> );</div>
<div class="line"><a name="l00631"></a><span class="lineno"> 631</span> </div>
<div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  }</div>
<div class="line"><a name="l00634"></a><span class="lineno"> 634</span> </div>
<div class="line"><a name="l00635"></a><span class="lineno"> 635</span> <span class="preprocessor">#if defined(POLARSSL_CIPHER_MODE_CBC)</span></div>
<div class="line"><a name="l00636"></a><span class="lineno"> 636</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179cabc642c3486ec5224ef3c13e53fc941d0">POLARSSL_MODE_CBC</a> == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> )</div>
<div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  {</div>
<div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  <span class="keywordtype">int</span> ret = 0;</div>
<div class="line"><a name="l00639"></a><span class="lineno"> 639</span> </div>
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  <span class="keywordflow">if</span>( <a class="code" href="cipher_8h.html#a76a810650461f2062938ee9b82666b36ad8e41c0d381b23d7835dd322e511564f">POLARSSL_ENCRYPT</a> == ctx-><a class="code" href="structcipher__context__t.html#a621cd7faaf726b227e2ad58e8b7b755d">operation</a> )</div>
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  {</div>
<div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  <span class="comment">/* check for 'no padding' mode */</span></div>
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  <span class="keywordflow">if</span>( NULL == ctx-><a class="code" href="structcipher__context__t.html#a74f805b3f876cb363903b874e8f753d4">add_padding</a> )</div>
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  {</div>
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  <span class="keywordflow">if</span>( 0 != ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a> )</div>
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#ae92e3caeb14ac7b0a3ac63aa49d88e9e">POLARSSL_ERR_CIPHER_FULL_BLOCK_EXPECTED</a> );</div>
<div class="line"><a name="l00647"></a><span class="lineno"> 647</span> </div>
<div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00649"></a><span class="lineno"> 649</span>  }</div>
<div class="line"><a name="l00650"></a><span class="lineno"> 650</span> </div>
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  ctx-><a class="code" href="structcipher__context__t.html#a74f805b3f876cb363903b874e8f753d4">add_padding</a>( ctx-><a class="code" href="structcipher__context__t.html#a972bc531a9d9b7779d42c433157ac908">unprocessed_data</a>, <a class="code" href="cipher_8h.html#a0555cab5391282ebcb61a899c00addec">cipher_get_iv_size</a>( ctx ),</div>
<div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a> );</div>
<div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  }</div>
<div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span>( <a class="code" href="cipher_8h.html#ac3ffcee4725c03638726f7211b31bcb7">cipher_get_block_size</a>( ctx ) != ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a> )</div>
<div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  {</div>
<div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00657"></a><span class="lineno"> 657</span> <span class="comment"> * For decrypt operations, expect a full block,</span></div>
<div class="line"><a name="l00658"></a><span class="lineno"> 658</span> <span class="comment"> * or an empty block if no padding</span></div>
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  <span class="keywordflow">if</span>( NULL == ctx-><a class="code" href="structcipher__context__t.html#a74f805b3f876cb363903b874e8f753d4">add_padding</a> && 0 == ctx-><a class="code" href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">unprocessed_len</a> )</div>
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span> </div>
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#ae92e3caeb14ac7b0a3ac63aa49d88e9e">POLARSSL_ERR_CIPHER_FULL_BLOCK_EXPECTED</a> );</div>
<div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  }</div>
<div class="line"><a name="l00665"></a><span class="lineno"> 665</span> </div>
<div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  <span class="comment">/* cipher block */</span></div>
<div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  <span class="keywordflow">if</span>( 0 != ( ret = ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a12c80723dd2c354ff5596b0931d4fedb">base</a>-><a class="code" href="structcipher__base__t.html#a72fe8be6c0c358fa81953db9251d482e">cbc_func</a>( ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a>,</div>
<div class="line"><a name="l00668"></a><span class="lineno"> 668</span>  ctx-><a class="code" href="structcipher__context__t.html#a621cd7faaf726b227e2ad58e8b7b755d">operation</a>, <a class="code" href="cipher_8h.html#ac3ffcee4725c03638726f7211b31bcb7">cipher_get_block_size</a>( ctx ), ctx-><a class="code" href="structcipher__context__t.html#ade41d48b148134eebae1e5801b0cf426">iv</a>,</div>
<div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  ctx-><a class="code" href="structcipher__context__t.html#a972bc531a9d9b7779d42c433157ac908">unprocessed_data</a>, output ) ) )</div>
<div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  {</div>
<div class="line"><a name="l00671"></a><span class="lineno"> 671</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  }</div>
<div class="line"><a name="l00673"></a><span class="lineno"> 673</span> </div>
<div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  <span class="comment">/* Set output size for decryption */</span></div>
<div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  <span class="keywordflow">if</span>( <a class="code" href="cipher_8h.html#a76a810650461f2062938ee9b82666b36ae99cd4d55b496dbb74727f7a6ed872c7">POLARSSL_DECRYPT</a> == ctx-><a class="code" href="structcipher__context__t.html#a621cd7faaf726b227e2ad58e8b7b755d">operation</a> )</div>
<div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  <span class="keywordflow">return</span> ctx-><a class="code" href="structcipher__context__t.html#a43140706e02a4b53d0bd3e048221f3e0">get_padding</a>( output, <a class="code" href="cipher_8h.html#ac3ffcee4725c03638726f7211b31bcb7">cipher_get_block_size</a>( ctx ),</div>
<div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  olen );</div>
<div class="line"><a name="l00678"></a><span class="lineno"> 678</span> </div>
<div class="line"><a name="l00679"></a><span class="lineno"> 679</span>  <span class="comment">/* Set output size for encryption */</span></div>
<div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  *olen = <a class="code" href="cipher_8h.html#ac3ffcee4725c03638726f7211b31bcb7">cipher_get_block_size</a>( ctx );</div>
<div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  }</div>
<div class="line"><a name="l00683"></a><span class="lineno"> 683</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00684"></a><span class="lineno"> 684</span> <span class="preprocessor"></span> ((void) output);</div>
<div class="line"><a name="l00685"></a><span class="lineno"> 685</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CIPHER_MODE_CBC */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00686"></a><span class="lineno"> 686</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a8625e259f484845e8fe6103f14f14f85">POLARSSL_ERR_CIPHER_FEATURE_UNAVAILABLE</a> );</div>
<div class="line"><a name="l00688"></a><span class="lineno"> 688</span> }</div>
<div class="line"><a name="l00689"></a><span class="lineno"> 689</span> </div>
<div class="line"><a name="l00690"></a><span class="lineno"> 690</span> <span class="preprocessor">#if defined(POLARSSL_CIPHER_MODE_WITH_PADDING)</span></div>
<div class="line"><a name="l00691"></a><span class="lineno"> 691</span> <span class="preprocessor"></span><span class="keywordtype">int</span> <a class="code" href="cipher_8h.html#abbc809fe32e1cce35834006d1edf1f2c">cipher_set_padding_mode</a>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> *ctx, <a class="code" href="cipher_8h.html#acb17eb5d2106ba020a20b70d878aa7dd">cipher_padding_t</a> mode )</div>
<div class="line"><a name="l00692"></a><span class="lineno"> 692</span> {</div>
<div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  <span class="keywordflow">if</span>( NULL == ctx ||</div>
<div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179cabc642c3486ec5224ef3c13e53fc941d0">POLARSSL_MODE_CBC</a> != ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> )</div>
<div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  {</div>
<div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  }</div>
<div class="line"><a name="l00698"></a><span class="lineno"> 698</span> </div>
<div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  <span class="keywordflow">switch</span>( mode )</div>
<div class="line"><a name="l00700"></a><span class="lineno"> 700</span>  {</div>
<div class="line"><a name="l00701"></a><span class="lineno"> 701</span> <span class="preprocessor">#if defined(POLARSSL_CIPHER_PADDING_PKCS7)</span></div>
<div class="line"><a name="l00702"></a><span class="lineno"> 702</span> <span class="preprocessor"></span> <span class="keywordflow">case</span> <a class="code" href="cipher_8h.html#acb17eb5d2106ba020a20b70d878aa7dda4a67d6bf4aec45912ee66f37a3cbb8a8">POLARSSL_PADDING_PKCS7</a>:</div>
<div class="line"><a name="l00703"></a><span class="lineno"> 703</span>  ctx-><a class="code" href="structcipher__context__t.html#a74f805b3f876cb363903b874e8f753d4">add_padding</a> = add_pkcs_padding;</div>
<div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  ctx-><a class="code" href="structcipher__context__t.html#a43140706e02a4b53d0bd3e048221f3e0">get_padding</a> = get_pkcs_padding;</div>
<div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00706"></a><span class="lineno"> 706</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00707"></a><span class="lineno"> 707</span> <span class="preprocessor"></span><span class="preprocessor">#if defined(POLARSSL_CIPHER_PADDING_ONE_AND_ZEROS)</span></div>
<div class="line"><a name="l00708"></a><span class="lineno"> 708</span> <span class="preprocessor"></span> <span class="keywordflow">case</span> <a class="code" href="cipher_8h.html#acb17eb5d2106ba020a20b70d878aa7dda1500b0293a75a29cef21ea91ca279edc">POLARSSL_PADDING_ONE_AND_ZEROS</a>:</div>
<div class="line"><a name="l00709"></a><span class="lineno"> 709</span>  ctx-><a class="code" href="structcipher__context__t.html#a74f805b3f876cb363903b874e8f753d4">add_padding</a> = add_one_and_zeros_padding;</div>
<div class="line"><a name="l00710"></a><span class="lineno"> 710</span>  ctx-><a class="code" href="structcipher__context__t.html#a43140706e02a4b53d0bd3e048221f3e0">get_padding</a> = get_one_and_zeros_padding;</div>
<div class="line"><a name="l00711"></a><span class="lineno"> 711</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00712"></a><span class="lineno"> 712</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00713"></a><span class="lineno"> 713</span> <span class="preprocessor"></span><span class="preprocessor">#if defined(POLARSSL_CIPHER_PADDING_ZEROS_AND_LEN)</span></div>
<div class="line"><a name="l00714"></a><span class="lineno"> 714</span> <span class="preprocessor"></span> <span class="keywordflow">case</span> <a class="code" href="cipher_8h.html#acb17eb5d2106ba020a20b70d878aa7dda5610144cf3e2bf2289e0e52e3fe16aa2">POLARSSL_PADDING_ZEROS_AND_LEN</a>:</div>
<div class="line"><a name="l00715"></a><span class="lineno"> 715</span>  ctx-><a class="code" href="structcipher__context__t.html#a74f805b3f876cb363903b874e8f753d4">add_padding</a> = add_zeros_and_len_padding;</div>
<div class="line"><a name="l00716"></a><span class="lineno"> 716</span>  ctx-><a class="code" href="structcipher__context__t.html#a43140706e02a4b53d0bd3e048221f3e0">get_padding</a> = get_zeros_and_len_padding;</div>
<div class="line"><a name="l00717"></a><span class="lineno"> 717</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00718"></a><span class="lineno"> 718</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00719"></a><span class="lineno"> 719</span> <span class="preprocessor"></span><span class="preprocessor">#if defined(POLARSSL_CIPHER_PADDING_ZEROS)</span></div>
<div class="line"><a name="l00720"></a><span class="lineno"> 720</span> <span class="preprocessor"></span> <span class="keywordflow">case</span> <a class="code" href="cipher_8h.html#acb17eb5d2106ba020a20b70d878aa7ddadba7dd52d3452542bba0d1391301b7d6">POLARSSL_PADDING_ZEROS</a>:</div>
<div class="line"><a name="l00721"></a><span class="lineno"> 721</span>  ctx-><a class="code" href="structcipher__context__t.html#a74f805b3f876cb363903b874e8f753d4">add_padding</a> = add_zeros_padding;</div>
<div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  ctx-><a class="code" href="structcipher__context__t.html#a43140706e02a4b53d0bd3e048221f3e0">get_padding</a> = get_zeros_padding;</div>
<div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00724"></a><span class="lineno"> 724</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00725"></a><span class="lineno"> 725</span> <span class="preprocessor"></span> <span class="keywordflow">case</span> <a class="code" href="cipher_8h.html#acb17eb5d2106ba020a20b70d878aa7ddaae558f0b4d848f4a29f0fae3fedbcf99">POLARSSL_PADDING_NONE</a>:</div>
<div class="line"><a name="l00726"></a><span class="lineno"> 726</span>  ctx-><a class="code" href="structcipher__context__t.html#a74f805b3f876cb363903b874e8f753d4">add_padding</a> = NULL;</div>
<div class="line"><a name="l00727"></a><span class="lineno"> 727</span>  ctx-><a class="code" href="structcipher__context__t.html#a43140706e02a4b53d0bd3e048221f3e0">get_padding</a> = get_no_padding;</div>
<div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00729"></a><span class="lineno"> 729</span> </div>
<div class="line"><a name="l00730"></a><span class="lineno"> 730</span>  <span class="keywordflow">default</span>:</div>
<div class="line"><a name="l00731"></a><span class="lineno"> 731</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a8625e259f484845e8fe6103f14f14f85">POLARSSL_ERR_CIPHER_FEATURE_UNAVAILABLE</a> );</div>
<div class="line"><a name="l00732"></a><span class="lineno"> 732</span>  }</div>
<div class="line"><a name="l00733"></a><span class="lineno"> 733</span> </div>
<div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00735"></a><span class="lineno"> 735</span> }</div>
<div class="line"><a name="l00736"></a><span class="lineno"> 736</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CIPHER_MODE_WITH_PADDING */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00737"></a><span class="lineno"> 737</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00738"></a><span class="lineno"> 738</span> <span class="preprocessor">#if defined(POLARSSL_GCM_C)</span></div>
<div class="line"><a name="l00739"></a><span class="lineno"> 739</span> <span class="preprocessor"></span><span class="keywordtype">int</span> <a class="code" href="cipher_8h.html#a54a922d31e506aa36dd8ed7798ed2a41">cipher_write_tag</a>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> *ctx,</div>
<div class="line"><a name="l00740"></a><span class="lineno"> 740</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *tag, <span class="keywordtype">size_t</span> tag_len )</div>
<div class="line"><a name="l00741"></a><span class="lineno"> 741</span> {</div>
<div class="line"><a name="l00742"></a><span class="lineno"> 742</span>  <span class="keywordflow">if</span>( NULL == ctx || NULL == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a> || NULL == tag )</div>
<div class="line"><a name="l00743"></a><span class="lineno"> 743</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00744"></a><span class="lineno"> 744</span> </div>
<div class="line"><a name="l00745"></a><span class="lineno"> 745</span>  <span class="keywordflow">if</span>( <a class="code" href="cipher_8h.html#a76a810650461f2062938ee9b82666b36ad8e41c0d381b23d7835dd322e511564f">POLARSSL_ENCRYPT</a> != ctx-><a class="code" href="structcipher__context__t.html#a621cd7faaf726b227e2ad58e8b7b755d">operation</a> )</div>
<div class="line"><a name="l00746"></a><span class="lineno"> 746</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00747"></a><span class="lineno"> 747</span> </div>
<div class="line"><a name="l00748"></a><span class="lineno"> 748</span>  <span class="keywordflow">if</span>( <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179ca45d7a269317fef5880d5ae9c6dae13f9">POLARSSL_MODE_GCM</a> == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> )</div>
<div class="line"><a name="l00749"></a><span class="lineno"> 749</span>  <span class="keywordflow">return</span> <a class="code" href="gcm_8h.html#a6544ce0fa5390ced146b041cfa8a4f88">gcm_finish</a>( (<a class="code" href="structgcm__context.html">gcm_context</a> *) ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a>, tag, tag_len );</div>
<div class="line"><a name="l00750"></a><span class="lineno"> 750</span> </div>
<div class="line"><a name="l00751"></a><span class="lineno"> 751</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00752"></a><span class="lineno"> 752</span> }</div>
<div class="line"><a name="l00753"></a><span class="lineno"> 753</span> </div>
<div class="line"><a name="l00754"></a><span class="lineno"> 754</span> <span class="keywordtype">int</span> <a class="code" href="cipher_8h.html#a907de4e9c5331d3e0a7d58c887e9173a">cipher_check_tag</a>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> *ctx,</div>
<div class="line"><a name="l00755"></a><span class="lineno"> 755</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *tag, <span class="keywordtype">size_t</span> tag_len )</div>
<div class="line"><a name="l00756"></a><span class="lineno"> 756</span> {</div>
<div class="line"><a name="l00757"></a><span class="lineno"> 757</span>  <span class="keywordtype">int</span> ret;</div>
<div class="line"><a name="l00758"></a><span class="lineno"> 758</span> </div>
<div class="line"><a name="l00759"></a><span class="lineno"> 759</span>  <span class="keywordflow">if</span>( NULL == ctx || NULL == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a> ||</div>
<div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  <a class="code" href="cipher_8h.html#a76a810650461f2062938ee9b82666b36ae99cd4d55b496dbb74727f7a6ed872c7">POLARSSL_DECRYPT</a> != ctx-><a class="code" href="structcipher__context__t.html#a621cd7faaf726b227e2ad58e8b7b755d">operation</a> )</div>
<div class="line"><a name="l00761"></a><span class="lineno"> 761</span>  {</div>
<div class="line"><a name="l00762"></a><span class="lineno"> 762</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00763"></a><span class="lineno"> 763</span>  }</div>
<div class="line"><a name="l00764"></a><span class="lineno"> 764</span> </div>
<div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  <span class="keywordflow">if</span>( <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179ca45d7a269317fef5880d5ae9c6dae13f9">POLARSSL_MODE_GCM</a> == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> )</div>
<div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  {</div>
<div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> check_tag[16];</div>
<div class="line"><a name="l00768"></a><span class="lineno"> 768</span>  <span class="keywordtype">size_t</span> i;</div>
<div class="line"><a name="l00769"></a><span class="lineno"> 769</span>  <span class="keywordtype">int</span> diff;</div>
<div class="line"><a name="l00770"></a><span class="lineno"> 770</span> </div>
<div class="line"><a name="l00771"></a><span class="lineno"> 771</span>  <span class="keywordflow">if</span>( tag_len > <span class="keyword">sizeof</span>( check_tag ) )</div>
<div class="line"><a name="l00772"></a><span class="lineno"> 772</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a> );</div>
<div class="line"><a name="l00773"></a><span class="lineno"> 773</span> </div>
<div class="line"><a name="l00774"></a><span class="lineno"> 774</span>  <span class="keywordflow">if</span>( 0 != ( ret = <a class="code" href="gcm_8h.html#a6544ce0fa5390ced146b041cfa8a4f88">gcm_finish</a>( (<a class="code" href="structgcm__context.html">gcm_context</a> *) ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a>,</div>
<div class="line"><a name="l00775"></a><span class="lineno"> 775</span>  check_tag, tag_len ) ) )</div>
<div class="line"><a name="l00776"></a><span class="lineno"> 776</span>  {</div>
<div class="line"><a name="l00777"></a><span class="lineno"> 777</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00778"></a><span class="lineno"> 778</span>  }</div>
<div class="line"><a name="l00779"></a><span class="lineno"> 779</span> </div>
<div class="line"><a name="l00780"></a><span class="lineno"> 780</span>  <span class="comment">/* Check the tag in "constant-time" */</span></div>
<div class="line"><a name="l00781"></a><span class="lineno"> 781</span>  <span class="keywordflow">for</span>( diff = 0, i = 0; i < tag_len; i++ )</div>
<div class="line"><a name="l00782"></a><span class="lineno"> 782</span>  diff |= tag[i] ^ check_tag[i];</div>
<div class="line"><a name="l00783"></a><span class="lineno"> 783</span> </div>
<div class="line"><a name="l00784"></a><span class="lineno"> 784</span>  <span class="keywordflow">if</span>( diff != 0 )</div>
<div class="line"><a name="l00785"></a><span class="lineno"> 785</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a0ed0acc64ce4edbb029dd1d7fd1c8710">POLARSSL_ERR_CIPHER_AUTH_FAILED</a> );</div>
<div class="line"><a name="l00786"></a><span class="lineno"> 786</span> </div>
<div class="line"><a name="l00787"></a><span class="lineno"> 787</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00788"></a><span class="lineno"> 788</span>  }</div>
<div class="line"><a name="l00789"></a><span class="lineno"> 789</span> </div>
<div class="line"><a name="l00790"></a><span class="lineno"> 790</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00791"></a><span class="lineno"> 791</span> }</div>
<div class="line"><a name="l00792"></a><span class="lineno"> 792</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_GCM_C */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00793"></a><span class="lineno"> 793</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00794"></a><span class="lineno"> 794</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00795"></a><span class="lineno"> 795</span> <span class="comment"> * Packet-oriented wrapper for non-AEAD modes</span></div>
<div class="line"><a name="l00796"></a><span class="lineno"> 796</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00797"></a><span class="lineno"> 797</span> <span class="keywordtype">int</span> <a class="code" href="cipher_8h.html#aac61499800e5f1436c61fcdd8be5ba4b">cipher_crypt</a>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> *ctx,</div>
<div class="line"><a name="l00798"></a><span class="lineno"> 798</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *iv, <span class="keywordtype">size_t</span> iv_len,</div>
<div class="line"><a name="l00799"></a><span class="lineno"> 799</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *input, <span class="keywordtype">size_t</span> ilen,</div>
<div class="line"><a name="l00800"></a><span class="lineno"> 800</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *output, <span class="keywordtype">size_t</span> *olen )</div>
<div class="line"><a name="l00801"></a><span class="lineno"> 801</span> {</div>
<div class="line"><a name="l00802"></a><span class="lineno"> 802</span>  <span class="keywordtype">int</span> ret;</div>
<div class="line"><a name="l00803"></a><span class="lineno"> 803</span>  <span class="keywordtype">size_t</span> finish_olen;</div>
<div class="line"><a name="l00804"></a><span class="lineno"> 804</span> </div>
<div class="line"><a name="l00805"></a><span class="lineno"> 805</span>  <span class="keywordflow">if</span>( ( ret = <a class="code" href="cipher_8h.html#abca5954bfff4e62c5280267d2a97171d">cipher_set_iv</a>( ctx, iv, iv_len ) ) != 0 )</div>
<div class="line"><a name="l00806"></a><span class="lineno"> 806</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00807"></a><span class="lineno"> 807</span> </div>
<div class="line"><a name="l00808"></a><span class="lineno"> 808</span>  <span class="keywordflow">if</span>( ( ret = <a class="code" href="cipher_8h.html#a0a55a8eeae5ebb2627c59257ffb202bc">cipher_reset</a>( ctx ) ) != 0 )</div>
<div class="line"><a name="l00809"></a><span class="lineno"> 809</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00810"></a><span class="lineno"> 810</span> </div>
<div class="line"><a name="l00811"></a><span class="lineno"> 811</span>  <span class="keywordflow">if</span>( ( ret = <a class="code" href="cipher_8h.html#afca62e9b6e95da3a46fa6c95f0a09e38">cipher_update</a>( ctx, input, ilen, output, olen ) ) != 0 )</div>
<div class="line"><a name="l00812"></a><span class="lineno"> 812</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00813"></a><span class="lineno"> 813</span> </div>
<div class="line"><a name="l00814"></a><span class="lineno"> 814</span>  <span class="keywordflow">if</span>( ( ret = <a class="code" href="cipher_8h.html#a12a036b9caa428f47dfb14c06753f14c">cipher_finish</a>( ctx, output + *olen, &finish_olen ) ) != 0 )</div>
<div class="line"><a name="l00815"></a><span class="lineno"> 815</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00816"></a><span class="lineno"> 816</span> </div>
<div class="line"><a name="l00817"></a><span class="lineno"> 817</span>  *olen += finish_olen;</div>
<div class="line"><a name="l00818"></a><span class="lineno"> 818</span> </div>
<div class="line"><a name="l00819"></a><span class="lineno"> 819</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00820"></a><span class="lineno"> 820</span> }</div>
<div class="line"><a name="l00821"></a><span class="lineno"> 821</span> </div>
<div class="line"><a name="l00822"></a><span class="lineno"> 822</span> <span class="preprocessor">#if defined(POLARSSL_CIPHER_MODE_AEAD)</span></div>
<div class="line"><a name="l00823"></a><span class="lineno"> 823</span> <span class="preprocessor"></span><span class="comment">/*</span></div>
<div class="line"><a name="l00824"></a><span class="lineno"> 824</span> <span class="comment"> * Packet-oriented encryption for AEAD modes</span></div>
<div class="line"><a name="l00825"></a><span class="lineno"> 825</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00826"></a><span class="lineno"> 826</span> <span class="keywordtype">int</span> <a class="code" href="cipher_8h.html#a30155c676722d3538392b32ac45e8f8a">cipher_auth_encrypt</a>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> *ctx,</div>
<div class="line"><a name="l00827"></a><span class="lineno"> 827</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *iv, <span class="keywordtype">size_t</span> iv_len,</div>
<div class="line"><a name="l00828"></a><span class="lineno"> 828</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *ad, <span class="keywordtype">size_t</span> ad_len,</div>
<div class="line"><a name="l00829"></a><span class="lineno"> 829</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *input, <span class="keywordtype">size_t</span> ilen,</div>
<div class="line"><a name="l00830"></a><span class="lineno"> 830</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *output, <span class="keywordtype">size_t</span> *olen,</div>
<div class="line"><a name="l00831"></a><span class="lineno"> 831</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *tag, <span class="keywordtype">size_t</span> tag_len )</div>
<div class="line"><a name="l00832"></a><span class="lineno"> 832</span> {</div>
<div class="line"><a name="l00833"></a><span class="lineno"> 833</span> <span class="preprocessor">#if defined(POLARSSL_GCM_C)</span></div>
<div class="line"><a name="l00834"></a><span class="lineno"> 834</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179ca45d7a269317fef5880d5ae9c6dae13f9">POLARSSL_MODE_GCM</a> == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> )</div>
<div class="line"><a name="l00835"></a><span class="lineno"> 835</span>  {</div>
<div class="line"><a name="l00836"></a><span class="lineno"> 836</span>  *olen = ilen;</div>
<div class="line"><a name="l00837"></a><span class="lineno"> 837</span>  <span class="keywordflow">return</span>( <a class="code" href="gcm_8h.html#ad87f8fd2a45b5b32c545443779c48c2d">gcm_crypt_and_tag</a>( ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a>, <a class="code" href="gcm_8h.html#a9ec162612f0f3a8b7e380c02ffc35867">GCM_ENCRYPT</a>, ilen,</div>
<div class="line"><a name="l00838"></a><span class="lineno"> 838</span>  iv, iv_len, ad, ad_len, input, output,</div>
<div class="line"><a name="l00839"></a><span class="lineno"> 839</span>  tag_len, tag ) );</div>
<div class="line"><a name="l00840"></a><span class="lineno"> 840</span>  }</div>
<div class="line"><a name="l00841"></a><span class="lineno"> 841</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_GCM_C */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00842"></a><span class="lineno"> 842</span> <span class="preprocessor"></span><span class="preprocessor">#if defined(POLARSSL_CCM_C)</span></div>
<div class="line"><a name="l00843"></a><span class="lineno"> 843</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179cabf517e1e6d97cc0b58ae154f5a2a1265">POLARSSL_MODE_CCM</a> == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> )</div>
<div class="line"><a name="l00844"></a><span class="lineno"> 844</span>  {</div>
<div class="line"><a name="l00845"></a><span class="lineno"> 845</span>  *olen = ilen;</div>
<div class="line"><a name="l00846"></a><span class="lineno"> 846</span>  <span class="keywordflow">return</span>( <a class="code" href="ccm_8h.html#a4e501cc42e38bf5e6f9b51920213d4bd">ccm_encrypt_and_tag</a>( ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a>, ilen,</div>
<div class="line"><a name="l00847"></a><span class="lineno"> 847</span>  iv, iv_len, ad, ad_len, input, output,</div>
<div class="line"><a name="l00848"></a><span class="lineno"> 848</span>  tag, tag_len ) );</div>
<div class="line"><a name="l00849"></a><span class="lineno"> 849</span>  }</div>
<div class="line"><a name="l00850"></a><span class="lineno"> 850</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CCM_C */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00851"></a><span class="lineno"> 851</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00852"></a><span class="lineno"> 852</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a8625e259f484845e8fe6103f14f14f85">POLARSSL_ERR_CIPHER_FEATURE_UNAVAILABLE</a> );</div>
<div class="line"><a name="l00853"></a><span class="lineno"> 853</span> }</div>
<div class="line"><a name="l00854"></a><span class="lineno"> 854</span> </div>
<div class="line"><a name="l00855"></a><span class="lineno"> 855</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00856"></a><span class="lineno"> 856</span> <span class="comment"> * Packet-oriented decryption for AEAD modes</span></div>
<div class="line"><a name="l00857"></a><span class="lineno"> 857</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00858"></a><span class="lineno"> 858</span> <span class="keywordtype">int</span> <a class="code" href="cipher_8h.html#ad2f7c44697223ae63d7814fc7e8b9092">cipher_auth_decrypt</a>( <a class="code" href="structcipher__context__t.html">cipher_context_t</a> *ctx,</div>
<div class="line"><a name="l00859"></a><span class="lineno"> 859</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *iv, <span class="keywordtype">size_t</span> iv_len,</div>
<div class="line"><a name="l00860"></a><span class="lineno"> 860</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *ad, <span class="keywordtype">size_t</span> ad_len,</div>
<div class="line"><a name="l00861"></a><span class="lineno"> 861</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *input, <span class="keywordtype">size_t</span> ilen,</div>
<div class="line"><a name="l00862"></a><span class="lineno"> 862</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *output, <span class="keywordtype">size_t</span> *olen,</div>
<div class="line"><a name="l00863"></a><span class="lineno"> 863</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *tag, <span class="keywordtype">size_t</span> tag_len )</div>
<div class="line"><a name="l00864"></a><span class="lineno"> 864</span> {</div>
<div class="line"><a name="l00865"></a><span class="lineno"> 865</span> <span class="preprocessor">#if defined(POLARSSL_GCM_C)</span></div>
<div class="line"><a name="l00866"></a><span class="lineno"> 866</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179ca45d7a269317fef5880d5ae9c6dae13f9">POLARSSL_MODE_GCM</a> == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> )</div>
<div class="line"><a name="l00867"></a><span class="lineno"> 867</span>  {</div>
<div class="line"><a name="l00868"></a><span class="lineno"> 868</span>  <span class="keywordtype">int</span> ret;</div>
<div class="line"><a name="l00869"></a><span class="lineno"> 869</span> </div>
<div class="line"><a name="l00870"></a><span class="lineno"> 870</span>  *olen = ilen;</div>
<div class="line"><a name="l00871"></a><span class="lineno"> 871</span>  ret = <a class="code" href="gcm_8h.html#a61dae452f29231fe46c1bacee4c60e72">gcm_auth_decrypt</a>( ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a>, ilen,</div>
<div class="line"><a name="l00872"></a><span class="lineno"> 872</span>  iv, iv_len, ad, ad_len,</div>
<div class="line"><a name="l00873"></a><span class="lineno"> 873</span>  tag, tag_len, input, output );</div>
<div class="line"><a name="l00874"></a><span class="lineno"> 874</span> </div>
<div class="line"><a name="l00875"></a><span class="lineno"> 875</span>  <span class="keywordflow">if</span>( ret == <a class="code" href="gcm_8h.html#a489a0823c71a0855d61f649bd1c7f4b0">POLARSSL_ERR_GCM_AUTH_FAILED</a> )</div>
<div class="line"><a name="l00876"></a><span class="lineno"> 876</span>  ret = <a class="code" href="cipher_8h.html#a0ed0acc64ce4edbb029dd1d7fd1c8710">POLARSSL_ERR_CIPHER_AUTH_FAILED</a>;</div>
<div class="line"><a name="l00877"></a><span class="lineno"> 877</span> </div>
<div class="line"><a name="l00878"></a><span class="lineno"> 878</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00879"></a><span class="lineno"> 879</span>  }</div>
<div class="line"><a name="l00880"></a><span class="lineno"> 880</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_GCM_C */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00881"></a><span class="lineno"> 881</span> <span class="preprocessor"></span><span class="preprocessor">#if defined(POLARSSL_CCM_C)</span></div>
<div class="line"><a name="l00882"></a><span class="lineno"> 882</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( <a class="code" href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179cabf517e1e6d97cc0b58ae154f5a2a1265">POLARSSL_MODE_CCM</a> == ctx-><a class="code" href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_info</a>-><a class="code" href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">mode</a> )</div>
<div class="line"><a name="l00883"></a><span class="lineno"> 883</span>  {</div>
<div class="line"><a name="l00884"></a><span class="lineno"> 884</span>  <span class="keywordtype">int</span> ret;</div>
<div class="line"><a name="l00885"></a><span class="lineno"> 885</span> </div>
<div class="line"><a name="l00886"></a><span class="lineno"> 886</span>  *olen = ilen;</div>
<div class="line"><a name="l00887"></a><span class="lineno"> 887</span>  ret = <a class="code" href="ccm_8h.html#a3cabbc9a5e7f023d25b1e9a7e7583506">ccm_auth_decrypt</a>( ctx-><a class="code" href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_ctx</a>, ilen,</div>
<div class="line"><a name="l00888"></a><span class="lineno"> 888</span>  iv, iv_len, ad, ad_len,</div>
<div class="line"><a name="l00889"></a><span class="lineno"> 889</span>  input, output, tag, tag_len );</div>
<div class="line"><a name="l00890"></a><span class="lineno"> 890</span> </div>
<div class="line"><a name="l00891"></a><span class="lineno"> 891</span>  <span class="keywordflow">if</span>( ret == <a class="code" href="ccm_8h.html#a51ba7afc7f66aa40e849813869c5d402">POLARSSL_ERR_CCM_AUTH_FAILED</a> )</div>
<div class="line"><a name="l00892"></a><span class="lineno"> 892</span>  ret = <a class="code" href="cipher_8h.html#a0ed0acc64ce4edbb029dd1d7fd1c8710">POLARSSL_ERR_CIPHER_AUTH_FAILED</a>;</div>
<div class="line"><a name="l00893"></a><span class="lineno"> 893</span> </div>
<div class="line"><a name="l00894"></a><span class="lineno"> 894</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00895"></a><span class="lineno"> 895</span>  }</div>
<div class="line"><a name="l00896"></a><span class="lineno"> 896</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CCM_C */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00897"></a><span class="lineno"> 897</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00898"></a><span class="lineno"> 898</span>  <span class="keywordflow">return</span>( <a class="code" href="cipher_8h.html#a8625e259f484845e8fe6103f14f14f85">POLARSSL_ERR_CIPHER_FEATURE_UNAVAILABLE</a> );</div>
<div class="line"><a name="l00899"></a><span class="lineno"> 899</span> }</div>
<div class="line"><a name="l00900"></a><span class="lineno"> 900</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CIPHER_MODE_AEAD */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00901"></a><span class="lineno"> 901</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00902"></a><span class="lineno"> 902</span> </div>
<div class="line"><a name="l00903"></a><span class="lineno"> 903</span> <span class="preprocessor">#if defined(POLARSSL_SELF_TEST)</span></div>
<div class="line"><a name="l00904"></a><span class="lineno"> 904</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00905"></a><span class="lineno"> 905</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00906"></a><span class="lineno"> 906</span> <span class="comment"> * Checkup routine</span></div>
<div class="line"><a name="l00907"></a><span class="lineno"> 907</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00908"></a><span class="lineno"> 908</span> <span class="keywordtype">int</span> <a class="code" href="cipher_8h.html#ae9adb04c9894c75bbf71189d25b1b988">cipher_self_test</a>( <span class="keywordtype">int</span> verbose )</div>
<div class="line"><a name="l00909"></a><span class="lineno"> 909</span> {</div>
<div class="line"><a name="l00910"></a><span class="lineno"> 910</span>  ((void) verbose);</div>
<div class="line"><a name="l00911"></a><span class="lineno"> 911</span> </div>
<div class="line"><a name="l00912"></a><span class="lineno"> 912</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00913"></a><span class="lineno"> 913</span> }</div>
<div class="line"><a name="l00914"></a><span class="lineno"> 914</span> </div>
<div class="line"><a name="l00915"></a><span class="lineno"> 915</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_SELF_TEST */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00916"></a><span class="lineno"> 916</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00917"></a><span class="lineno"> 917</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CIPHER_C */</span><span class="preprocessor"></span></div>
<div class="ttc" id="structcipher__context__t_html_ab101b4f205022bb29b5aa3e46ba9c79f"><div class="ttname"><a href="structcipher__context__t.html#ab101b4f205022bb29b5aa3e46ba9c79f">cipher_context_t::key_length</a></div><div class="ttdeci">int key_length</div><div class="ttdoc">Key length to use. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00263">cipher.h:263</a></div></div>
<div class="ttc" id="cipher_8h_html_a7078656ad138756ee9991f15d529d3bb"><div class="ttname"><a href="cipher_8h.html#a7078656ad138756ee9991f15d529d3bb">POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</a></div><div class="ttdeci">#define POLARSSL_ERR_CIPHER_BAD_INPUT_DATA</div><div class="ttdoc">Bad input parameters to function. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00058">cipher.h:58</a></div></div>
<div class="ttc" id="cipher__wrap_8h_html_a66281692d5aea0e483bede9586e77616"><div class="ttname"><a href="cipher__wrap_8h.html#a66281692d5aea0e483bede9586e77616">supported_ciphers</a></div><div class="ttdeci">int supported_ciphers[]</div></div>
<div class="ttc" id="gcm_8h_html_a61dae452f29231fe46c1bacee4c60e72"><div class="ttname"><a href="gcm_8h.html#a61dae452f29231fe46c1bacee4c60e72">gcm_auth_decrypt</a></div><div class="ttdeci">int gcm_auth_decrypt(gcm_context *ctx, size_t length, const unsigned char *iv, size_t iv_len, const unsigned char *add, size_t add_len, const unsigned char *tag, size_t tag_len, const unsigned char *input, unsigned char *output)</div><div class="ttdoc">GCM buffer authenticated decryption using a block cipher. </div></div>
<div class="ttc" id="cipher_8h_html_a12a036b9caa428f47dfb14c06753f14c"><div class="ttname"><a href="cipher_8h.html#a12a036b9caa428f47dfb14c06753f14c">cipher_finish</a></div><div class="ttdeci">int cipher_finish(cipher_context_t *ctx, unsigned char *output, size_t *olen)</div><div class="ttdoc">Generic cipher finalisation function. </div></div>
<div class="ttc" id="cipher_8h_html_af65d0bd9b5c3504fd010cf54955b179cafea74e56f89fafd334db1f5cb850e913"><div class="ttname"><a href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179cafea74e56f89fafd334db1f5cb850e913">POLARSSL_MODE_CFB</a></div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00138">cipher.h:138</a></div></div>
<div class="ttc" id="cipher_8h_html_a8625e259f484845e8fe6103f14f14f85"><div class="ttname"><a href="cipher_8h.html#a8625e259f484845e8fe6103f14f14f85">POLARSSL_ERR_CIPHER_FEATURE_UNAVAILABLE</a></div><div class="ttdeci">#define POLARSSL_ERR_CIPHER_FEATURE_UNAVAILABLE</div><div class="ttdoc">The selected feature is not available. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00057">cipher.h:57</a></div></div>
<div class="ttc" id="cipher_8h_html_a0555cab5391282ebcb61a899c00addec"><div class="ttname"><a href="cipher_8h.html#a0555cab5391282ebcb61a899c00addec">cipher_get_iv_size</a></div><div class="ttdeci">static int cipher_get_iv_size(const cipher_context_t *ctx)</div><div class="ttdoc">Returns the size of the cipher&#39;s IV/NONCE in bytes. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00418">cipher.h:418</a></div></div>
<div class="ttc" id="structcipher__context__t_html"><div class="ttname"><a href="structcipher__context__t.html">cipher_context_t</a></div><div class="ttdoc">Generic cipher context. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00258">cipher.h:258</a></div></div>
<div class="ttc" id="cipher_8h_html_af65d0bd9b5c3504fd010cf54955b179cabf517e1e6d97cc0b58ae154f5a2a1265"><div class="ttname"><a href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179cabf517e1e6d97cc0b58ae154f5a2a1265">POLARSSL_MODE_CCM</a></div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00143">cipher.h:143</a></div></div>
<div class="ttc" id="cipher_8h_html_af65d0bd9b5c3504fd010cf54955b179cabc642c3486ec5224ef3c13e53fc941d0"><div class="ttname"><a href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179cabc642c3486ec5224ef3c13e53fc941d0">POLARSSL_MODE_CBC</a></div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00137">cipher.h:137</a></div></div>
<div class="ttc" id="cipher_8h_html_ab4d8385421d4fb4a71f2a00734487688"><div class="ttname"><a href="cipher_8h.html#ab4d8385421d4fb4a71f2a00734487688">POLARSSL_ERR_CIPHER_ALLOC_FAILED</a></div><div class="ttdeci">#define POLARSSL_ERR_CIPHER_ALLOC_FAILED</div><div class="ttdoc">Failed to allocate memory. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00059">cipher.h:59</a></div></div>
<div class="ttc" id="cipher_8h_html_a6a719708dc3b2f0d0e7beadccf871f4f"><div class="ttname"><a href="cipher_8h.html#a6a719708dc3b2f0d0e7beadccf871f4f">cipher_init</a></div><div class="ttdeci">void cipher_init(cipher_context_t *ctx)</div><div class="ttdoc">Initialize a cipher_context (as NONE) </div></div>
<div class="ttc" id="cipher_8h_html_a54a922d31e506aa36dd8ed7798ed2a41"><div class="ttname"><a href="cipher_8h.html#a54a922d31e506aa36dd8ed7798ed2a41">cipher_write_tag</a></div><div class="ttdeci">int cipher_write_tag(cipher_context_t *ctx, unsigned char *tag, size_t tag_len)</div><div class="ttdoc">Write tag for AEAD ciphers. </div></div>
<div class="ttc" id="cipher_8h_html_af65d0bd9b5c3504fd010cf54955b179caaefd6ed34c1992d638129e161b28084a"><div class="ttname"><a href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179caaefd6ed34c1992d638129e161b28084a">POLARSSL_MODE_ECB</a></div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00136">cipher.h:136</a></div></div>
<div class="ttc" id="structcipher__info__t_html"><div class="ttname"><a href="structcipher__info__t.html">cipher_info_t</a></div><div class="ttdoc">Cipher information. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00226">cipher.h:226</a></div></div>
<div class="ttc" id="cipher_8h_html_acb17eb5d2106ba020a20b70d878aa7ddadba7dd52d3452542bba0d1391301b7d6"><div class="ttname"><a href="cipher_8h.html#acb17eb5d2106ba020a20b70d878aa7ddadba7dd52d3452542bba0d1391301b7d6">POLARSSL_PADDING_ZEROS</a></div><div class="ttdoc">zero padding (not reversible!) </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00150">cipher.h:150</a></div></div>
<div class="ttc" id="cipher_8h_html_a1a6dfa43a6758eb075dd2eb86b538900"><div class="ttname"><a href="cipher_8h.html#a1a6dfa43a6758eb075dd2eb86b538900">cipher_info_from_type</a></div><div class="ttdeci">const cipher_info_t * cipher_info_from_type(const cipher_type_t cipher_type)</div><div class="ttdoc">Returns the cipher information structure associated with the given cipher type. </div></div>
<div class="ttc" id="cipher_8h_html_ac3ffcee4725c03638726f7211b31bcb7"><div class="ttname"><a href="cipher_8h.html#ac3ffcee4725c03638726f7211b31bcb7">cipher_get_block_size</a></div><div class="ttdeci">static unsigned int cipher_get_block_size(const cipher_context_t *ctx)</div><div class="ttdoc">Returns the block size of the given cipher. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00384">cipher.h:384</a></div></div>
<div class="ttc" id="cipher_8h_html_a76763329d5579d862dfca01adf32c05b"><div class="ttname"><a href="cipher_8h.html#a76763329d5579d862dfca01adf32c05b">cipher_info_from_string</a></div><div class="ttdeci">const cipher_info_t * cipher_info_from_string(const char *cipher_name)</div><div class="ttdoc">Returns the cipher information structure associated with the given cipher name. </div></div>
<div class="ttc" id="structcipher__context__t_html_a43140706e02a4b53d0bd3e048221f3e0"><div class="ttname"><a href="structcipher__context__t.html#a43140706e02a4b53d0bd3e048221f3e0">cipher_context_t::get_padding</a></div><div class="ttdeci">int(* get_padding)(unsigned char *input, size_t ilen, size_t *data_len)</div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00270">cipher.h:270</a></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="structcipher__definition__t_html_a7a5ac4f5a5a273eee1fc9a3e42bf16e0"><div class="ttname"><a href="structcipher__definition__t.html#a7a5ac4f5a5a273eee1fc9a3e42bf16e0">cipher_definition_t::type</a></div><div class="ttdeci">cipher_type_t type</div><div class="ttdef"><b>Definition:</b> <a href="cipher__wrap_8h_source.html#l00045">cipher_wrap.h:45</a></div></div>
<div class="ttc" id="cipher_8h_html_af65d0bd9b5c3504fd010cf54955b179ca45d7a269317fef5880d5ae9c6dae13f9"><div class="ttname"><a href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179ca45d7a269317fef5880d5ae9c6dae13f9">POLARSSL_MODE_GCM</a></div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00141">cipher.h:141</a></div></div>
<div class="ttc" id="structcipher__base__t_html_a8066218dfde7c5207d9b50458ee81ca6"><div class="ttname"><a href="structcipher__base__t.html#a8066218dfde7c5207d9b50458ee81ca6">cipher_base_t::ctx_free_func</a></div><div class="ttdeci">void(* ctx_free_func)(void *ctx)</div><div class="ttdoc">Free the given context. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00219">cipher.h:219</a></div></div>
<div class="ttc" id="cipher_8h_html_a87777f84d48de3a0d48b252d85c8adc3"><div class="ttname"><a href="cipher_8h.html#a87777f84d48de3a0d48b252d85c8adc3">POLARSSL_ERR_CIPHER_INVALID_PADDING</a></div><div class="ttdeci">#define POLARSSL_ERR_CIPHER_INVALID_PADDING</div><div class="ttdoc">Input data contains invalid padding and is rejected. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00060">cipher.h:60</a></div></div>
<div class="ttc" id="cipher_8h_html_acb17eb5d2106ba020a20b70d878aa7dda1500b0293a75a29cef21ea91ca279edc"><div class="ttname"><a href="cipher_8h.html#acb17eb5d2106ba020a20b70d878aa7dda1500b0293a75a29cef21ea91ca279edc">POLARSSL_PADDING_ONE_AND_ZEROS</a></div><div class="ttdoc">ISO/IEC 7816-4 padding. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00148">cipher.h:148</a></div></div>
<div class="ttc" id="cipher_8h_html_aac61499800e5f1436c61fcdd8be5ba4b"><div class="ttname"><a href="cipher_8h.html#aac61499800e5f1436c61fcdd8be5ba4b">cipher_crypt</a></div><div class="ttdeci">int cipher_crypt(cipher_context_t *ctx, const unsigned char *iv, size_t iv_len, const unsigned char *input, size_t ilen, unsigned char *output, size_t *olen)</div><div class="ttdoc">Generic all-in-one encryption/decryption (for all ciphers except AEAD constructs). </div></div>
<div class="ttc" id="structcipher__base__t_html_a72fe8be6c0c358fa81953db9251d482e"><div class="ttname"><a href="structcipher__base__t.html#a72fe8be6c0c358fa81953db9251d482e">cipher_base_t::cbc_func</a></div><div class="ttdeci">int(* cbc_func)(void *ctx, operation_t mode, size_t length, unsigned char *iv, const unsigned char *input, unsigned char *output)</div><div class="ttdoc">Encrypt using CBC. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00189">cipher.h:189</a></div></div>
<div class="ttc" id="cipher__wrap_8h_html_a82a4254bbd88da3626267612e7054c2f"><div class="ttname"><a href="cipher__wrap_8h.html#a82a4254bbd88da3626267612e7054c2f">cipher_definitions</a></div><div class="ttdeci">const cipher_definition_t cipher_definitions[]</div></div>
<div class="ttc" id="ccm_8h_html_a3cabbc9a5e7f023d25b1e9a7e7583506"><div class="ttname"><a href="ccm_8h.html#a3cabbc9a5e7f023d25b1e9a7e7583506">ccm_auth_decrypt</a></div><div class="ttdeci">int ccm_auth_decrypt(ccm_context *ctx, size_t length, const unsigned char *iv, size_t iv_len, const unsigned char *add, size_t add_len, const unsigned char *input, unsigned char *output, const unsigned char *tag, size_t tag_len)</div><div class="ttdoc">CCM buffer authenticated decryption. </div></div>
<div class="ttc" id="gcm_8h_html_a9ec162612f0f3a8b7e380c02ffc35867"><div class="ttname"><a href="gcm_8h.html#a9ec162612f0f3a8b7e380c02ffc35867">GCM_ENCRYPT</a></div><div class="ttdeci">#define GCM_ENCRYPT</div><div class="ttdef"><b>Definition:</b> <a href="gcm_8h_source.html#l00040">gcm.h:40</a></div></div>
<div class="ttc" id="cipher__wrap_8h_html"><div class="ttname"><a href="cipher__wrap_8h.html">cipher_wrap.h</a></div><div class="ttdoc">Cipher wrappers. </div></div>
<div class="ttc" id="structcipher__base__t_html_af6992411c58361334758dfa5caeac2c1"><div class="ttname"><a href="structcipher__base__t.html#af6992411c58361334758dfa5caeac2c1">cipher_base_t::ecb_func</a></div><div class="ttdeci">int(* ecb_func)(void *ctx, operation_t mode, const unsigned char *input, unsigned char *output)</div><div class="ttdoc">Encrypt using ECB. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00185">cipher.h:185</a></div></div>
<div class="ttc" id="cipher_8h_html_af65d0bd9b5c3504fd010cf54955b179caf460bee5fb0bf8b383a1fe23099b6707"><div class="ttname"><a href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179caf460bee5fb0bf8b383a1fe23099b6707">POLARSSL_MODE_STREAM</a></div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00142">cipher.h:142</a></div></div>
<div class="ttc" id="structcipher__context__t_html_ade41d48b148134eebae1e5801b0cf426"><div class="ttname"><a href="structcipher__context__t.html#ade41d48b148134eebae1e5801b0cf426">cipher_context_t::iv</a></div><div class="ttdeci">unsigned char iv[POLARSSL_MAX_IV_LENGTH]</div><div class="ttdoc">Current IV or NONCE_COUNTER for CTR-mode. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00279">cipher.h:279</a></div></div>
<div class="ttc" id="structcipher__context__t_html_a93c2ded51eb87ba78aa9ee10d8f476fb"><div class="ttname"><a href="structcipher__context__t.html#a93c2ded51eb87ba78aa9ee10d8f476fb">cipher_context_t::cipher_info</a></div><div class="ttdeci">const cipher_info_t * cipher_info</div><div class="ttdoc">Information about the associated cipher. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00260">cipher.h:260</a></div></div>
<div class="ttc" id="structcipher__base__t_html_af6c613d58788fe5a9b52268a63f8b7fc"><div class="ttname"><a href="structcipher__base__t.html#af6c613d58788fe5a9b52268a63f8b7fc">cipher_base_t::cfb_func</a></div><div class="ttdeci">int(* cfb_func)(void *ctx, operation_t mode, size_t length, size_t *iv_off, unsigned char *iv, const unsigned char *input, unsigned char *output)</div><div class="ttdoc">Encrypt using CFB (Full length) </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00194">cipher.h:194</a></div></div>
<div class="ttc" id="cipher_8h_html_a76a810650461f2062938ee9b82666b36ad8e41c0d381b23d7835dd322e511564f"><div class="ttname"><a href="cipher_8h.html#a76a810650461f2062938ee9b82666b36ad8e41c0d381b23d7835dd322e511564f">POLARSSL_ENCRYPT</a></div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00157">cipher.h:157</a></div></div>
<div class="ttc" id="gcm_8h_html_ad87f8fd2a45b5b32c545443779c48c2d"><div class="ttname"><a href="gcm_8h.html#ad87f8fd2a45b5b32c545443779c48c2d">gcm_crypt_and_tag</a></div><div class="ttdeci">int gcm_crypt_and_tag(gcm_context *ctx, int mode, size_t length, const unsigned char *iv, size_t iv_len, const unsigned char *add, size_t add_len, const unsigned char *input, unsigned char *output, size_t tag_len, unsigned char *tag)</div><div class="ttdoc">GCM buffer encryption/decryption using a block cipher. </div></div>
<div class="ttc" id="structcipher__base__t_html_a52cf7e0f45be977a86dce9df04a38efa"><div class="ttname"><a href="structcipher__base__t.html#a52cf7e0f45be977a86dce9df04a38efa">cipher_base_t::ctr_func</a></div><div class="ttdeci">int(* ctr_func)(void *ctx, size_t length, size_t *nc_off, unsigned char *nonce_counter, unsigned char *stream_block, const unsigned char *input, unsigned char *output)</div><div class="ttdoc">Encrypt using CTR. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00199">cipher.h:199</a></div></div>
<div class="ttc" id="structcipher__context__t_html_a621cd7faaf726b227e2ad58e8b7b755d"><div class="ttname"><a href="structcipher__context__t.html#a621cd7faaf726b227e2ad58e8b7b755d">cipher_context_t::operation</a></div><div class="ttdeci">operation_t operation</div><div class="ttdoc">Operation that the context&#39;s key has been initialised for. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00266">cipher.h:266</a></div></div>
<div class="ttc" id="cipher_8h_html_af65d0bd9b5c3504fd010cf54955b179c"><div class="ttname"><a href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179c">cipher_mode_t</a></div><div class="ttdeci">cipher_mode_t</div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00134">cipher.h:134</a></div></div>
<div class="ttc" id="cipher_8h_html_a806c82ed7e8b591dedc86093f38274e6"><div class="ttname"><a href="cipher_8h.html#a806c82ed7e8b591dedc86093f38274e6">cipher_type_t</a></div><div class="ttdeci">cipher_type_t</div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00082">cipher.h:82</a></div></div>
<div class="ttc" id="structcipher__context__t_html_a777d4a1f4f3951a475ec9ebbf2527a28"><div class="ttname"><a href="structcipher__context__t.html#a777d4a1f4f3951a475ec9ebbf2527a28">cipher_context_t::unprocessed_len</a></div><div class="ttdeci">size_t unprocessed_len</div><div class="ttdoc">Number of bytes that still need processing. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00276">cipher.h:276</a></div></div>
<div class="ttc" id="cipher_8h_html_ac8abe3c96c800481697cfe8260cf829d"><div class="ttname"><a href="cipher_8h.html#ac8abe3c96c800481697cfe8260cf829d">cipher_free_ctx</a></div><div class="ttdeci">int cipher_free_ctx(cipher_context_t *ctx)</div><div class="ttdoc">Free the cipher-specific context of ctx. </div></div>
<div class="ttc" id="cipher_8h_html_a5b8cb1cff4b19e01849c84c67364500d"><div class="ttname"><a href="cipher_8h.html#a5b8cb1cff4b19e01849c84c67364500d">cipher_update_ad</a></div><div class="ttdeci">int cipher_update_ad(cipher_context_t *ctx, const unsigned char *ad, size_t ad_len)</div><div class="ttdoc">Add additional data (for AEAD ciphers). </div></div>
<div class="ttc" id="structcipher__info__t_html_a2a22ee6e5c529e10cbe6225d71460b26"><div class="ttname"><a href="structcipher__info__t.html#a2a22ee6e5c529e10cbe6225d71460b26">cipher_info_t::key_length</a></div><div class="ttdeci">unsigned int key_length</div><div class="ttdoc">Cipher key length, in bits (default length for variable sized ciphers) (Includes parity bits for ciph...</div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00235">cipher.h:235</a></div></div>
<div class="ttc" id="cipher_8h_html_a76a810650461f2062938ee9b82666b36"><div class="ttname"><a href="cipher_8h.html#a76a810650461f2062938ee9b82666b36">operation_t</a></div><div class="ttdeci">operation_t</div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00154">cipher.h:154</a></div></div>
<div class="ttc" id="cipher_8h_html_abca5954bfff4e62c5280267d2a97171d"><div class="ttname"><a href="cipher_8h.html#abca5954bfff4e62c5280267d2a97171d">cipher_set_iv</a></div><div class="ttdeci">int cipher_set_iv(cipher_context_t *ctx, const unsigned char *iv, size_t iv_len)</div><div class="ttdoc">Set the initialization vector (IV) or nonce. </div></div>
<div class="ttc" id="cipher_8h_html_af1930bcb6327197ff0980aed8bfc3736"><div class="ttname"><a href="cipher_8h.html#af1930bcb6327197ff0980aed8bfc3736">POLARSSL_CIPHER_VARIABLE_IV_LEN</a></div><div class="ttdeci">#define POLARSSL_CIPHER_VARIABLE_IV_LEN</div><div class="ttdoc">Cipher accepts IVs of variable length. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00064">cipher.h:64</a></div></div>
<div class="ttc" id="cipher_8h_html_a30155c676722d3538392b32ac45e8f8a"><div class="ttname"><a href="cipher_8h.html#a30155c676722d3538392b32ac45e8f8a">cipher_auth_encrypt</a></div><div class="ttdeci">int cipher_auth_encrypt(cipher_context_t *ctx, const unsigned char *iv, size_t iv_len, const unsigned char *ad, size_t ad_len, const unsigned char *input, size_t ilen, unsigned char *output, size_t *olen, unsigned char *tag, size_t tag_len)</div><div class="ttdoc">Generic autenticated encryption (AEAD ciphers). </div></div>
<div class="ttc" id="cipher_8h_html_afca62e9b6e95da3a46fa6c95f0a09e38"><div class="ttname"><a href="cipher_8h.html#afca62e9b6e95da3a46fa6c95f0a09e38">cipher_update</a></div><div class="ttdeci">int cipher_update(cipher_context_t *ctx, const unsigned char *input, size_t ilen, unsigned char *output, size_t *olen)</div><div class="ttdoc">Generic cipher update function. </div></div>
<div class="ttc" id="structcipher__base__t_html_ad6e8bdd1fe87bc2fc1d83d5b84900d1f"><div class="ttname"><a href="structcipher__base__t.html#ad6e8bdd1fe87bc2fc1d83d5b84900d1f">cipher_base_t::setkey_dec_func</a></div><div class="ttdeci">int(* setkey_dec_func)(void *ctx, const unsigned char *key, unsigned int key_length)</div><div class="ttdoc">Set key for decryption purposes. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00212">cipher.h:212</a></div></div>
<div class="ttc" id="cipher_8h_html_ad2f7c44697223ae63d7814fc7e8b9092"><div class="ttname"><a href="cipher_8h.html#ad2f7c44697223ae63d7814fc7e8b9092">cipher_auth_decrypt</a></div><div class="ttdeci">int cipher_auth_decrypt(cipher_context_t *ctx, const unsigned char *iv, size_t iv_len, const unsigned char *ad, size_t ad_len, const unsigned char *input, size_t ilen, unsigned char *output, size_t *olen, const unsigned char *tag, size_t tag_len)</div><div class="ttdoc">Generic autenticated decryption (AEAD ciphers). </div></div>
<div class="ttc" id="structcipher__context__t_html_a972bc531a9d9b7779d42c433157ac908"><div class="ttname"><a href="structcipher__context__t.html#a972bc531a9d9b7779d42c433157ac908">cipher_context_t::unprocessed_data</a></div><div class="ttdeci">unsigned char unprocessed_data[POLARSSL_MAX_BLOCK_LENGTH]</div><div class="ttdoc">Buffer for data that hasn&#39;t been encrypted yet. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00273">cipher.h:273</a></div></div>
<div class="ttc" id="structcipher__base__t_html_a2f751a12e583a0c1bdf4e35376e1a79b"><div class="ttname"><a href="structcipher__base__t.html#a2f751a12e583a0c1bdf4e35376e1a79b">cipher_base_t::stream_func</a></div><div class="ttdeci">int(* stream_func)(void *ctx, size_t length, const unsigned char *input, unsigned char *output)</div><div class="ttdoc">Encrypt using STREAM. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00204">cipher.h:204</a></div></div>
<div class="ttc" id="cipher_8h_html_ae92e3caeb14ac7b0a3ac63aa49d88e9e"><div class="ttname"><a href="cipher_8h.html#ae92e3caeb14ac7b0a3ac63aa49d88e9e">POLARSSL_ERR_CIPHER_FULL_BLOCK_EXPECTED</a></div><div class="ttdeci">#define POLARSSL_ERR_CIPHER_FULL_BLOCK_EXPECTED</div><div class="ttdoc">Decryption of block requires a full block. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00061">cipher.h:61</a></div></div>
<div class="ttc" id="structcipher__info__t_html_a9b189d0ce9de3eada6b874f1ce8a7393"><div class="ttname"><a href="structcipher__info__t.html#a9b189d0ce9de3eada6b874f1ce8a7393">cipher_info_t::name</a></div><div class="ttdeci">const char * name</div><div class="ttdoc">Name of the cipher. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00238">cipher.h:238</a></div></div>
<div class="ttc" id="structgcm__context_html"><div class="ttname"><a href="structgcm__context.html">gcm_context</a></div><div class="ttdoc">GCM context structure. </div><div class="ttdef"><b>Definition:</b> <a href="gcm_8h_source.html#l00053">gcm.h:53</a></div></div>
<div class="ttc" id="cipher_8h_html"><div class="ttname"><a href="cipher_8h.html">cipher.h</a></div><div class="ttdoc">Generic cipher wrapper. </div></div>
<div class="ttc" id="cipher_8h_html_a373f5d3a0a42c77ff4f5fe4fe7da0560"><div class="ttname"><a href="cipher_8h.html#a373f5d3a0a42c77ff4f5fe4fe7da0560">cipher_id_t</a></div><div class="ttdeci">cipher_id_t</div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00071">cipher.h:71</a></div></div>
<div class="ttc" id="cipher_8h_html_aded691b9d905920d9675e7b9828a237c"><div class="ttname"><a href="cipher_8h.html#aded691b9d905920d9675e7b9828a237c">POLARSSL_MAX_IV_LENGTH</a></div><div class="ttdeci">#define POLARSSL_MAX_IV_LENGTH</div><div class="ttdoc">Maximum length of any IV, in bytes. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00172">cipher.h:172</a></div></div>
<div class="ttc" id="cipher_8h_html_a0a55a8eeae5ebb2627c59257ffb202bc"><div class="ttname"><a href="cipher_8h.html#a0a55a8eeae5ebb2627c59257ffb202bc">cipher_reset</a></div><div class="ttdeci">int cipher_reset(cipher_context_t *ctx)</div><div class="ttdoc">Finish preparation of the given context. </div></div>
<div class="ttc" id="structcipher__base__t_html_a408d1cfbdf0e392052223e32dec2be3a"><div class="ttname"><a href="structcipher__base__t.html#a408d1cfbdf0e392052223e32dec2be3a">cipher_base_t::setkey_enc_func</a></div><div class="ttdeci">int(* setkey_enc_func)(void *ctx, const unsigned char *key, unsigned int key_length)</div><div class="ttdoc">Set key for encryption purposes. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00208">cipher.h:208</a></div></div>
<div class="ttc" id="structcipher__base__t_html_a91741724a7a4e396e4a946d6d4f713c1"><div class="ttname"><a href="structcipher__base__t.html#a91741724a7a4e396e4a946d6d4f713c1">cipher_base_t::ctx_alloc_func</a></div><div class="ttdeci">void *(* ctx_alloc_func)(void)</div><div class="ttdoc">Allocate a new context. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00216">cipher.h:216</a></div></div>
<div class="ttc" id="structcipher__base__t_html_a539b9bf80fc122393affcc4cf8e1d3cc"><div class="ttname"><a href="structcipher__base__t.html#a539b9bf80fc122393affcc4cf8e1d3cc">cipher_base_t::cipher</a></div><div class="ttdeci">cipher_id_t cipher</div><div class="ttdoc">Base Cipher type (e.g. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00182">cipher.h:182</a></div></div>
<div class="ttc" id="structcipher__definition__t_html"><div class="ttname"><a href="structcipher__definition__t.html">cipher_definition_t</a></div><div class="ttdef"><b>Definition:</b> <a href="cipher__wrap_8h_source.html#l00043">cipher_wrap.h:43</a></div></div>
<div class="ttc" id="cipher_8h_html_af27f8e4cd1fab59615c3d73c69d136c8"><div class="ttname"><a href="cipher_8h.html#af27f8e4cd1fab59615c3d73c69d136c8">cipher_free</a></div><div class="ttdeci">void cipher_free(cipher_context_t *ctx)</div><div class="ttdoc">Free and clear the cipher-specific context of ctx. </div></div>
<div class="ttc" id="cipher_8h_html_abbc809fe32e1cce35834006d1edf1f2c"><div class="ttname"><a href="cipher_8h.html#abbc809fe32e1cce35834006d1edf1f2c">cipher_set_padding_mode</a></div><div class="ttdeci">int cipher_set_padding_mode(cipher_context_t *ctx, cipher_padding_t mode)</div><div class="ttdoc">Set padding mode, for cipher modes that use padding. </div></div>
<div class="ttc" id="structcipher__info__t_html_a61c2ca01508859a6119d8b4c22e2edd2"><div class="ttname"><a href="structcipher__info__t.html#a61c2ca01508859a6119d8b4c22e2edd2">cipher_info_t::mode</a></div><div class="ttdeci">cipher_mode_t mode</div><div class="ttdoc">Cipher mode (e.g. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00231">cipher.h:231</a></div></div>
<div class="ttc" id="gcm_8h_html_a489a0823c71a0855d61f649bd1c7f4b0"><div class="ttname"><a href="gcm_8h.html#a489a0823c71a0855d61f649bd1c7f4b0">POLARSSL_ERR_GCM_AUTH_FAILED</a></div><div class="ttdeci">#define POLARSSL_ERR_GCM_AUTH_FAILED</div><div class="ttdoc">Authenticated decryption failed. </div><div class="ttdef"><b>Definition:</b> <a href="gcm_8h_source.html#l00043">gcm.h:43</a></div></div>
<div class="ttc" id="cipher_8h_html_a76a810650461f2062938ee9b82666b36ae99cd4d55b496dbb74727f7a6ed872c7"><div class="ttname"><a href="cipher_8h.html#a76a810650461f2062938ee9b82666b36ae99cd4d55b496dbb74727f7a6ed872c7">POLARSSL_DECRYPT</a></div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00156">cipher.h:156</a></div></div>
<div class="ttc" id="cipher_8h_html_acb17eb5d2106ba020a20b70d878aa7dd"><div class="ttname"><a href="cipher_8h.html#acb17eb5d2106ba020a20b70d878aa7dd">cipher_padding_t</a></div><div class="ttdeci">cipher_padding_t</div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00146">cipher.h:146</a></div></div>
<div class="ttc" id="cipher_8h_html_acb17eb5d2106ba020a20b70d878aa7dda4a67d6bf4aec45912ee66f37a3cbb8a8"><div class="ttname"><a href="cipher_8h.html#acb17eb5d2106ba020a20b70d878aa7dda4a67d6bf4aec45912ee66f37a3cbb8a8">POLARSSL_PADDING_PKCS7</a></div><div class="ttdoc">PKCS7 padding (default) </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00147">cipher.h:147</a></div></div>
<div class="ttc" id="cipher_8h_html_adc7c37e925193805884085ca87587f64"><div class="ttname"><a href="cipher_8h.html#adc7c37e925193805884085ca87587f64">cipher_init_ctx</a></div><div class="ttdeci">int cipher_init_ctx(cipher_context_t *ctx, const cipher_info_t *cipher_info)</div><div class="ttdoc">Initialises and fills the cipher context structure with the appropriate values. </div></div>
<div class="ttc" id="cipher_8h_html_a77355bddf2d69f68d55e2bd2374e9257"><div class="ttname"><a href="cipher_8h.html#a77355bddf2d69f68d55e2bd2374e9257">cipher_setkey</a></div><div class="ttdeci">int cipher_setkey(cipher_context_t *ctx, const unsigned char *key, int key_length, const operation_t operation)</div><div class="ttdoc">Set the key to use with the given context. </div></div>
<div class="ttc" id="gcm_8h_html_ac27c1ae819964e256ad31076bf8be0ac"><div class="ttname"><a href="gcm_8h.html#ac27c1ae819964e256ad31076bf8be0ac">gcm_update</a></div><div class="ttdeci">int gcm_update(gcm_context *ctx, size_t length, const unsigned char *input, unsigned char *output)</div><div class="ttdoc">Generic GCM update function. </div></div>
<div class="ttc" id="gcm_8h_html_a44f5d26e87eda4ef3fd6ca33bdddc17a"><div class="ttname"><a href="gcm_8h.html#a44f5d26e87eda4ef3fd6ca33bdddc17a">gcm_starts</a></div><div class="ttdeci">int gcm_starts(gcm_context *ctx, int mode, const unsigned char *iv, size_t iv_len, const unsigned char *add, size_t add_len)</div><div class="ttdoc">Generic GCM stream start function. </div></div>
<div class="ttc" id="cipher_8h_html_acb17eb5d2106ba020a20b70d878aa7ddaae558f0b4d848f4a29f0fae3fedbcf99"><div class="ttname"><a href="cipher_8h.html#acb17eb5d2106ba020a20b70d878aa7ddaae558f0b4d848f4a29f0fae3fedbcf99">POLARSSL_PADDING_NONE</a></div><div class="ttdoc">never pad (full blocks only) </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00151">cipher.h:151</a></div></div>
<div class="ttc" id="ccm_8h_html_a4e501cc42e38bf5e6f9b51920213d4bd"><div class="ttname"><a href="ccm_8h.html#a4e501cc42e38bf5e6f9b51920213d4bd">ccm_encrypt_and_tag</a></div><div class="ttdeci">int ccm_encrypt_and_tag(ccm_context *ctx, size_t length, const unsigned char *iv, size_t iv_len, const unsigned char *add, size_t add_len, const unsigned char *input, unsigned char *output, unsigned char *tag, size_t tag_len)</div><div class="ttdoc">CCM buffer encryption. </div></div>
<div class="ttc" id="gcm_8h_html"><div class="ttname"><a href="gcm_8h.html">gcm.h</a></div><div class="ttdoc">Galois/Counter mode for 128-bit block ciphers. </div></div>
<div class="ttc" id="structcipher__info__t_html_a12c80723dd2c354ff5596b0931d4fedb"><div class="ttname"><a href="structcipher__info__t.html#a12c80723dd2c354ff5596b0931d4fedb">cipher_info_t::base</a></div><div class="ttdeci">const cipher_base_t * base</div><div class="ttdoc">Base cipher information and functions. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00251">cipher.h:251</a></div></div>
<div class="ttc" id="cipher_8h_html_a036719c5224e57cf8469ebf9daceb137"><div class="ttname"><a href="cipher_8h.html#a036719c5224e57cf8469ebf9daceb137">cipher_list</a></div><div class="ttdeci">const int * cipher_list(void)</div><div class="ttdoc">Returns the list of ciphers supported by the generic cipher module. </div></div>
<div class="ttc" id="gcm_8h_html_a6544ce0fa5390ced146b041cfa8a4f88"><div class="ttname"><a href="gcm_8h.html#a6544ce0fa5390ced146b041cfa8a4f88">gcm_finish</a></div><div class="ttdeci">int gcm_finish(gcm_context *ctx, unsigned char *tag, size_t tag_len)</div><div class="ttdoc">Generic GCM finalisation function. </div></div>
<div class="ttc" id="cipher_8h_html_acb17eb5d2106ba020a20b70d878aa7dda5610144cf3e2bf2289e0e52e3fe16aa2"><div class="ttname"><a href="cipher_8h.html#acb17eb5d2106ba020a20b70d878aa7dda5610144cf3e2bf2289e0e52e3fe16aa2">POLARSSL_PADDING_ZEROS_AND_LEN</a></div><div class="ttdoc">ANSI X.923 padding. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00149">cipher.h:149</a></div></div>
<div class="ttc" id="cipher_8h_html_af65d0bd9b5c3504fd010cf54955b179ca9c7b9959c0a1b08bed57d40edc27ffe9"><div class="ttname"><a href="cipher_8h.html#af65d0bd9b5c3504fd010cf54955b179ca9c7b9959c0a1b08bed57d40edc27ffe9">POLARSSL_MODE_CTR</a></div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00140">cipher.h:140</a></div></div>
<div class="ttc" id="structcipher__context__t_html_aef2bf9abf15fb851faf69c1591790f29"><div class="ttname"><a href="structcipher__context__t.html#aef2bf9abf15fb851faf69c1591790f29">cipher_context_t::cipher_ctx</a></div><div class="ttdeci">void * cipher_ctx</div><div class="ttdoc">Cipher-specific context. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00285">cipher.h:285</a></div></div>
<div class="ttc" id="cipher_8h_html_ae9adb04c9894c75bbf71189d25b1b988"><div class="ttname"><a href="cipher_8h.html#ae9adb04c9894c75bbf71189d25b1b988">cipher_self_test</a></div><div class="ttdeci">int cipher_self_test(int verbose)</div><div class="ttdoc">Checkup routine. </div></div>
<div class="ttc" id="structcipher__context__t_html_a74f805b3f876cb363903b874e8f753d4"><div class="ttname"><a href="structcipher__context__t.html#a74f805b3f876cb363903b874e8f753d4">cipher_context_t::add_padding</a></div><div class="ttdeci">void(* add_padding)(unsigned char *output, size_t olen, size_t data_len)</div><div class="ttdoc">Padding functions to use, if relevant for cipher mode. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00269">cipher.h:269</a></div></div>
<div class="ttc" id="structcipher__context__t_html_a124f269c0d3b1ce1a74f5dcacf69b688"><div class="ttname"><a href="structcipher__context__t.html#a124f269c0d3b1ce1a74f5dcacf69b688">cipher_context_t::iv_size</a></div><div class="ttdeci">size_t iv_size</div><div class="ttdoc">IV size in bytes (for ciphers with variable-length IVs) </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00282">cipher.h:282</a></div></div>
<div class="ttc" id="structcipher__info__t_html_ab3a9f706fa42f9a43a0e8d50ac54a959"><div class="ttname"><a href="structcipher__info__t.html#ab3a9f706fa42f9a43a0e8d50ac54a959">cipher_info_t::flags</a></div><div class="ttdeci">int flags</div><div class="ttdoc">Flags for variable IV size, variable key size, etc. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00245">cipher.h:245</a></div></div>
<div class="ttc" id="ccm_8h_html_a51ba7afc7f66aa40e849813869c5d402"><div class="ttname"><a href="ccm_8h.html#a51ba7afc7f66aa40e849813869c5d402">POLARSSL_ERR_CCM_AUTH_FAILED</a></div><div class="ttdeci">#define POLARSSL_ERR_CCM_AUTH_FAILED</div><div class="ttdoc">Authenticated decryption failed. </div><div class="ttdef"><b>Definition:</b> <a href="ccm_8h_source.html#l00033">ccm.h:33</a></div></div>
<div class="ttc" id="cipher_8h_html_a907de4e9c5331d3e0a7d58c887e9173a"><div class="ttname"><a href="cipher_8h.html#a907de4e9c5331d3e0a7d58c887e9173a">cipher_check_tag</a></div><div class="ttdeci">int cipher_check_tag(cipher_context_t *ctx, const unsigned char *tag, size_t tag_len)</div><div class="ttdoc">Check tag for AEAD ciphers. </div></div>
<div class="ttc" id="structcipher__info__t_html_ae8fde413dc240da60f4062c3138eec0a"><div class="ttname"><a href="structcipher__info__t.html#ae8fde413dc240da60f4062c3138eec0a">cipher_info_t::iv_size</a></div><div class="ttdeci">unsigned int iv_size</div><div class="ttdoc">IV/NONCE size, in bytes. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00242">cipher.h:242</a></div></div>
<div class="ttc" id="cipher_8h_html_a0ed0acc64ce4edbb029dd1d7fd1c8710"><div class="ttname"><a href="cipher_8h.html#a0ed0acc64ce4edbb029dd1d7fd1c8710">POLARSSL_ERR_CIPHER_AUTH_FAILED</a></div><div class="ttdeci">#define POLARSSL_ERR_CIPHER_AUTH_FAILED</div><div class="ttdoc">Authentication failed (for AEAD modes). </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00062">cipher.h:62</a></div></div>
<div class="ttc" id="cipher_8h_html_a49772688b048b1048944402c3429bf41"><div class="ttname"><a href="cipher_8h.html#a49772688b048b1048944402c3429bf41">POLARSSL_CIPHER_VARIABLE_KEY_LEN</a></div><div class="ttdeci">#define POLARSSL_CIPHER_VARIABLE_KEY_LEN</div><div class="ttdoc">Cipher accepts keys of variable length. </div><div class="ttdef"><b>Definition:</b> <a href="cipher_8h_source.html#l00065">cipher.h:65</a></div></div>
<div class="ttc" id="cipher_8h_html_a68fd6a4ea2c236dc4abcad76d73d5cac"><div class="ttname"><a href="cipher_8h.html#a68fd6a4ea2c236dc4abcad76d73d5cac">cipher_info_from_values</a></div><div class="ttdeci">const cipher_info_t * cipher_info_from_values(const cipher_id_t cipher_id, int key_length, const cipher_mode_t mode)</div><div class="ttdoc">Returns the cipher information structure associated with the given cipher id, key size and mode...</div></div>
<div class="ttc" id="ccm_8h_html"><div class="ttname"><a href="ccm_8h.html">ccm.h</a></div><div class="ttdoc">Counter with CBC-MAC (CCM) for 128-bit block ciphers. </div></div>
<div class="ttc" id="structcipher__definition__t_html_a5139461b26e070d9f939800be811c0cf"><div class="ttname"><a href="structcipher__definition__t.html#a5139461b26e070d9f939800be811c0cf">cipher_definition_t::info</a></div><div class="ttdeci">const cipher_info_t * info</div><div class="ttdef"><b>Definition:</b> <a href="cipher__wrap_8h_source.html#l00046">cipher_wrap.h:46</a></div></div>
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