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<div class="title">sec_negotiate_gnutls.h</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* FreeTDS - Library of routines accessing Sybase and Microsoft databases</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (C) 2015 Frediano Ziglio</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * This library is free software; you can redistribute it and/or</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * modify it under the terms of the GNU Library General Public</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * License as published by the Free Software Foundation; either</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * version 2 of the License, or (at your option) any later version.</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> *</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * This library is distributed in the hope that it will be useful,</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * Library General Public License for more details.</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> *</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * You should have received a copy of the GNU Library General Public</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * License along with this library; if not, write to the</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330,</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * Boston, MA 02111-1307, USA.</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> */</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include <gnutls/gnutls.h></span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <gnutls/crypto.h></span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#ifdef HAVE_GNUTLS_ABSTRACT_H</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor"># include <gnutls/abstract.h></span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#if !defined(HAVE_NETTLE) || !defined(HAVE_GMP) || !defined(HAVE_GNUTLS_RND)</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor"># include <gcrypt.h></span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#ifndef HAVE_NETTLE</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor"># include <libtasn1.h></span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#ifdef HAVE_NETTLE</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor"># include <nettle/asn1.h></span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor"># include <nettle/rsa.h></span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor"># include <nettle/bignum.h></span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#ifndef HAVE_GNUTLS</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#error HAVE_GNUTLS not defines, this file should not be included</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment">/* emulate GMP if not present */</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor">#ifndef HAVE_GMP</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor">#define HAVE_GMP 1</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00059"></a><span class="lineno"><a class="line" href="a00737.html"> 59</a></span> <span class="keyword">typedef</span> <span class="keyword">struct </span>{</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  gcry_mpi_t num;</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> } <a class="code" href="a00737.html">mpz_t</a>[1];</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor">#define mpz_powm(w,n,e,m) \</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="preprocessor"> gcry_mpi_powm((w)->num, (n)->num, (e)->num, (m)->num);</span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="preprocessor">#define mpz_init(n) do { (n)->num = NULL; } while(0)</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="preprocessor">#define mpz_clear(n) gcry_mpi_release((n)->num)</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment">/* emulate Nettle is not present */</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="preprocessor">#ifndef HAVE_NETTLE</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor">#define HAVE_NETTLE 1</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="keyword">typedef</span> <span class="keywordtype">void</span> nettle_random_func(<span class="keywordtype">void</span> *ctx, <span class="keywordtype">size_t</span> len, uint8_t *out);</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="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> nettle_mpz_set_str_256_u(<a class="code" href="a00737.html">mpz_t</a> x, <span class="keywordtype">unsigned</span> length, <span class="keyword">const</span> uint8_t *s)</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>  gcry_mpi_scan(&x->num, GCRYMPI_FMT_USG, s, length, NULL);</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> </div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> nettle_mpz_get_str_256(<span class="keywordtype">unsigned</span> length, uint8_t *s, <span class="keyword">const</span> <a class="code" href="a00737.html">mpz_t</a> x)</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> {</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  gcry_mpi_print(GCRYMPI_FMT_USG, s, length, NULL, x->num);</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> </div><div class="line"><a name="l00089"></a><span class="lineno"><a class="line" href="a00741.html"> 89</a></span> <span class="keyword">struct </span><a class="code" href="a00741.html">asn1_der_iterator</a> {</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *data, *data_end;</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> length;</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> type;</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> };</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="keyword">enum</span> asn1_iterator_result {</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  ASN1_ITERATOR_ERROR,</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  ASN1_ITERATOR_PRIMITIVE,</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  ASN1_ITERATOR_CONSTRUCTED,</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  ASN1_ITERATOR_END,</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> </div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="keyword">enum</span> {</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  ASN1_SEQUENCE = ASN1_TAG_SEQUENCE,</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> };</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="keyword">static</span> <span class="keyword">enum</span> asn1_iterator_result</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> asn1_der_iterator_next(<span class="keyword">struct</span> <a class="code" href="a00741.html">asn1_der_iterator</a> *der)</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> {</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> cls;</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> tag;</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordtype">int</span> len;</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordtype">long</span> l;</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">if</span> (asn1_get_tag_der(der->data, der->data_end - der->data, &cls, &len, &tag) != ASN1_SUCCESS)</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordflow">return</span> ASN1_ITERATOR_ERROR;</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  der->type = tag;</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  der->data += len;</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  l = asn1_get_length_der(der->data, der->data_end - der->data, &len);</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">if</span> (l < 0)</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">return</span> ASN1_ITERATOR_ERROR;</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  der->data += len;</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  der->length = l;</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">if</span> (cls == ASN1_CLASS_STRUCTURED)</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">return</span> ASN1_ITERATOR_CONSTRUCTED;</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordflow">return</span> ASN1_ITERATOR_PRIMITIVE;</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="keyword">static</span> <span class="keyword">enum</span> asn1_iterator_result</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> asn1_der_iterator_first(<span class="keyword">struct</span> <a class="code" href="a00741.html">asn1_der_iterator</a> *der, <span class="keywordtype">int</span> size, <span class="keyword">const</span> <span class="keywordtype">void</span> *der_buf)</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> {</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  der->data = (<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *) der_buf;</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  der->data_end = der->data + size;</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> </div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordflow">return</span> asn1_der_iterator_next(der);</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> }</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> </div><div class="line"><a name="l00137"></a><span class="lineno"><a class="line" href="a00745.html"> 137</a></span> <span class="keyword">struct </span><a class="code" href="a00745.html">rsa_public_key</a> {</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordtype">unsigned</span> size;</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <a class="code" href="a00737.html">mpz_t</a> n, e;</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> };</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span> </div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="keyword">static</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span> rsa_public_key_init(<span class="keyword">struct</span> <a class="code" href="a00745.html">rsa_public_key</a> *key)</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> {</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  key->size = 0;</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  mpz_init(key->n);</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  mpz_init(key->e);</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> </div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="keyword">static</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span> rsa_public_key_clear(<span class="keyword">struct</span> <a class="code" href="a00745.html">rsa_public_key</a> *key)</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span> {</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  mpz_clear(key->n);</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  mpz_clear(key->e);</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> </div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="keyword">static</span> <span class="keywordtype">int</span></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> rsa_public_key_from_der_iterator(<span class="keyword">struct</span> <a class="code" href="a00745.html">rsa_public_key</a> *key, <span class="keywordtype">unsigned</span> key_bits, <span class="keyword">struct</span> <a class="code" href="a00741.html">asn1_der_iterator</a> *der)</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span> {</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keyword">enum</span> asn1_iterator_result ret;</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span> </div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  ret = asn1_der_iterator_next(der);</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keywordflow">if</span> (ret != ASN1_ITERATOR_PRIMITIVE || der->type != ASN1_TAG_INTEGER)</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  gcry_mpi_scan(&key->n->num, GCRYMPI_FMT_USG, der->data, der->length, NULL);</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  key->size = (gcry_mpi_get_nbits(key->n->num)+7)/8;</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  der->data += der->length;</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>  ret = asn1_der_iterator_next(der);</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">if</span> (ret != ASN1_ITERATOR_PRIMITIVE || der->type != ASN1_TAG_INTEGER)</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  gcry_mpi_scan(&key->e->num, GCRYMPI_FMT_USG, der->data, der->length, NULL);</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span> </div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> }</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> </div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="keyword">static</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> sha1(uint8_t *hash, <span class="keyword">const</span> <span class="keywordtype">void</span> *data, <span class="keywordtype">size_t</span> len)</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span> {</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  gcry_md_hash_buffer(GCRY_MD_SHA1, hash, data, len);</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> }</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="keyword">static</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span> sha1(uint8_t *hash, <span class="keyword">const</span> <span class="keywordtype">void</span> *data, <span class="keywordtype">size_t</span> len)</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span> {</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keyword">struct </span>sha1_ctx ctx;</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  sha1_init(&ctx);</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  sha1_update(&ctx, len, (<span class="keyword">const</span> uint8_t *) data);</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  sha1_digest(&ctx, 20, hash);</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span> }</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="preprocessor">#endif</span></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> </div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span> <span class="keyword">static</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span> rnd_func(<span class="keywordtype">void</span> *ctx, <span class="keywordtype">size_t</span> len, uint8_t * out)</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span> {</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  tds_random_buffer(out, len);</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span> }</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span> </div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="preprocessor">#define dumpl(b,l) tdsdump_dump_buf(TDS_DBG_INFO1, #b, b, l)</span></div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="preprocessor">#ifndef dumpl</span></div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="preprocessor">#define dumpl(b,l) do {} while(0)</span></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="preprocessor">#define dump(b) dumpl(b, sizeof(b))</span></div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span> </div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span> <span class="comment">/* OAEP configuration parameters */</span></div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span> <span class="preprocessor">#define hash_func sha1</span></div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span> <span class="keyword">enum</span> { hash_len = 20 }; <span class="comment">/* sha1 length */</span></div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="keyword">enum</span> { key_size_max = 1024 }; <span class="comment">/* max key in bytes */</span></div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span> label[] = <span class="stringliteral">""</span>;</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span> </div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span> <span class="keyword">static</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span> memxor(uint8_t *dest, <span class="keyword">const</span> uint8_t *src, <span class="keywordtype">size_t</span> len)</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span> {</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordtype">size_t</span> n;</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordflow">for</span> (n = 0; n < len; ++n)</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  dest[n] = dest[n] ^ src[n];</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> </div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="keyword">static</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span> mgf_mask(uint8_t *dest, <span class="keywordtype">size_t</span> dest_len, <span class="keyword">const</span> uint8_t *mask, <span class="keywordtype">size_t</span> mask_len)</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="keywordtype">unsigned</span> n = 0;</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  uint8_t hash[hash_len];</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  uint8_t seed[mask_len + 4];</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>  memcpy(seed, mask, mask_len);</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="comment">/* we always have some data and check is done internally */</span></div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordflow">for</span> (;;) {</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  TDS_PUT_UA4BE(seed+mask_len, n);</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span> </div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  hash_func(hash, seed, <span class="keyword">sizeof</span>(seed));</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keywordflow">if</span> (dest_len <= hash_len) {</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  memxor(dest, hash, dest_len);</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keywordflow">break</span>;</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> </div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  memxor(dest, hash, hash_len);</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  dest += hash_len;</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  dest_len -= hash_len;</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  ++n;</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  }</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span> }</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span> </div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span> <span class="keyword">static</span> <span class="keywordtype">int</span></div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span> oaep_encrypt(<span class="keywordtype">size_t</span> key_size, <span class="keywordtype">void</span> *random_ctx, nettle_random_func *random,</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordtype">size_t</span> length, <span class="keyword">const</span> uint8_t *message, <a class="code" href="a00737.html">mpz_t</a> m)</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>  <span class="comment">/* EM: 0x00 ROS (HASH 0x00.. 0x01 message) */</span></div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="keyword">struct </span>{</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  uint8_t all[1]; <span class="comment">/* zero but used to access all data */</span></div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  uint8_t ros[hash_len];</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  uint8_t db[key_size_max - hash_len - 1];</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  } em;</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> db_len = key_size - hash_len - 1;</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> (length + hash_len * 2 + 2 > key_size)</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="comment">/* Message too long for this key. */</span></div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span> </div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="comment">/* create db */</span></div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  memset(&em, 0, <span class="keyword">sizeof</span>(em));</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  hash_func(em.db, label, strlen(label));</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  em.all[key_size - length - 1] = 0x1;</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  memcpy(em.all+(key_size - length), message, length);</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  dumpl(em.db, db_len);</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span> </div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="comment">/* create ros */</span></div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  random(random_ctx, hash_len, em.ros);</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  dump(em.ros);</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="comment">/* mask db */</span></div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  mgf_mask(em.db, db_len, em.ros, hash_len);</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  dumpl(em.db, db_len);</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>  <span class="comment">/* mask ros */</span></div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  mgf_mask(em.ros, hash_len, em.db, db_len);</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  dump(em.ros);</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span> </div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  nettle_mpz_set_str_256_u(m, key_size, em.all);</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span> </div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keywordflow">return</span> 1;</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> </div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <span class="keyword">static</span> <span class="keywordtype">int</span></div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span> rsa_encrypt_oaep(<span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="a00745.html">rsa_public_key</a> *key, <span class="keywordtype">void</span> *random_ctx, nettle_random_func *random,</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keywordtype">size_t</span> length, <span class="keyword">const</span> uint8_t *message, <a class="code" href="a00737.html">mpz_t</a> gibberish)</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">if</span> (!oaep_encrypt(key->size, random_ctx, random, length, message, gibberish))</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keywordflow">return</span> 0;</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>  mpz_powm(gibberish, gibberish, key->e, key->n);</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="keywordflow">return</span> 1;</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> </div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="keyword">static</span> <span class="keywordtype">void</span>*</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span> tds5_rsa_encrypt(<span class="keyword">const</span> <span class="keywordtype">void</span> *key, <span class="keywordtype">size_t</span> key_len, <span class="keyword">const</span> <span class="keywordtype">void</span> *nonce, <span class="keywordtype">size_t</span> nonce_len, <span class="keyword">const</span> <span class="keywordtype">char</span> *pwd, <span class="keywordtype">size_t</span> *em_size)</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span> {</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keywordtype">int</span> ret;</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <a class="code" href="a00737.html">mpz_t</a> p;</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  gnutls_datum_t pubkey_datum = { (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *) key, key_len };</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keyword">struct </span><a class="code" href="a00741.html">asn1_der_iterator</a> der;</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keyword">struct </span><a class="code" href="a00745.html">rsa_public_key</a> pubkey;</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  uint8_t *message;</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keywordtype">size_t</span> message_len, pwd_len;</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  uint8_t *em = NULL;</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> der_buf[2048];</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordtype">size_t</span> size = <span class="keyword">sizeof</span>(der_buf);</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>  mpz_init(p);</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  rsa_public_key_init(&pubkey);</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>  pwd_len = strlen(pwd);</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  message_len = nonce_len + pwd_len;</div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  message = tds_new(uint8_t, message_len);</div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keywordflow">if</span> (!message)</div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keywordflow">return</span> NULL;</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  memcpy(message, nonce, nonce_len);</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  memcpy(message + nonce_len, pwd, pwd_len);</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span> </div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="comment">/* use nettle directly */</span></div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="comment">/* parse PEM, get DER */</span></div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  ret = gnutls_pem_base64_decode(<span class="stringliteral">"RSA PUBLIC KEY"</span>, &pubkey_datum, der_buf, &size);</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="keywordflow">if</span> (ret) {</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <a class="code" href="a00434.html#ab45c291105027e69836002e1dd586141">tdsdump_log</a>(TDS_DBG_ERROR, <span class="stringliteral">"Error %d decoding public key: %s\n"</span>, ret, gnutls_strerror(ret));</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="keywordflow">goto</span> error;</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  }</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>  <span class="comment">/* get key with nettle using DER */</span></div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  ret = asn1_der_iterator_first(&der, size, der_buf);</div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="keywordflow">if</span> (ret != ASN1_ITERATOR_CONSTRUCTED || der.type != ASN1_SEQUENCE) {</div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <a class="code" href="a00434.html#ab45c291105027e69836002e1dd586141">tdsdump_log</a>(TDS_DBG_ERROR, <span class="stringliteral">"Invalid DER content\n"</span>);</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keywordflow">goto</span> error;</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> </div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  ret = rsa_public_key_from_der_iterator(&pubkey, key_size_max * 8, &der);</div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  <span class="keywordflow">if</span> (!ret) {</div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <a class="code" href="a00434.html#ab45c291105027e69836002e1dd586141">tdsdump_log</a>(TDS_DBG_ERROR, <span class="stringliteral">"Invalid DER content\n"</span>);</div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  <span class="keywordflow">goto</span> error;</div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  }</div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span> </div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <span class="comment">/* get password encrypted */</span></div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  ret = rsa_encrypt_oaep(&pubkey, NULL, rnd_func, message_len, message, p);</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="keywordflow">if</span> (!ret) {</div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <a class="code" href="a00434.html#ab45c291105027e69836002e1dd586141">tdsdump_log</a>(TDS_DBG_ERROR, <span class="stringliteral">"Error encrypting message\n"</span>);</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  <span class="keywordflow">goto</span> error;</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  }</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span> </div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  em = tds_new(uint8_t, pubkey.size);</div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  *em_size = pubkey.size;</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keywordflow">if</span> (!em)</div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  <span class="keywordflow">goto</span> error;</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>  nettle_mpz_get_str_256(pubkey.size, em, p);</div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span> </div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  <a class="code" href="a00434.html#a79449d2f35a8acc8ed0585044f75524d">tdsdump_dump_buf</a>(TDS_DBG_INFO1, <span class="stringliteral">"em"</span>, em, pubkey.size);</div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span> </div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span> error:</div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  free(message);</div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  rsa_public_key_clear(&pubkey);</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  mpz_clear(p);</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <span class="keywordflow">return</span> em;</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> </div><div class="ttc" id="a00741_html"><div class="ttname"><a href="a00741.html">asn1_der_iterator</a></div><div class="ttdef"><b>Definition:</b> sec_negotiate_gnutls.h:89</div></div>
<div class="ttc" id="a00737_html"><div class="ttname"><a href="a00737.html">mpz_t</a></div><div class="ttdef"><b>Definition:</b> sec_negotiate_gnutls.h:59</div></div>
<div class="ttc" id="a00434_html_ab45c291105027e69836002e1dd586141"><div class="ttname"><a href="a00434.html#ab45c291105027e69836002e1dd586141">tdsdump_log</a></div><div class="ttdeci">void tdsdump_log(const char *file, unsigned int level_line, const char *fmt,...)</div><div class="ttdoc">Write a message to the debug log. </div><div class="ttdef"><b>Definition:</b> log.c:353</div></div>
<div class="ttc" id="a00745_html"><div class="ttname"><a href="a00745.html">rsa_public_key</a></div><div class="ttdef"><b>Definition:</b> sec_negotiate_gnutls.h:137</div></div>
<div class="ttc" id="a00434_html_a79449d2f35a8acc8ed0585044f75524d"><div class="ttname"><a href="a00434.html#a79449d2f35a8acc8ed0585044f75524d">tdsdump_dump_buf</a></div><div class="ttdeci">void tdsdump_dump_buf(const char *file, unsigned int level_line, const char *msg, const void *buf, size_t length)</div><div class="ttdoc">Dump the contents of data into the log file in a human readable format. </div><div class="ttdef"><b>Definition:</b> log.c:255</div></div>
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