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<a href="hmac__drbg_8h.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="l00006"></a><span class="lineno"> 6</span> <span class="comment">/*</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * SPDX-License-Identifier: Apache-2.0</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * Licensed under the Apache License, Version 2.0 (the "License"); you may</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * not use this file except in compliance with the License.</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * You may obtain a copy of the License at</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"> * http://www.apache.org/licenses/LICENSE-2.0</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> *</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * Unless required by applicable law or agreed to in writing, software</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * See the License for the specific language governing permissions and</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * limitations under the License.</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> *</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * This file is part of mbed TLS (https://tls.mbed.org)</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> */</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#ifndef MBEDTLS_HMAC_DRBG_H</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#define MBEDTLS_HMAC_DRBG_H</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include "<a class="code" href="md_8h.html">md.h</a>"</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#if defined(MBEDTLS_THREADING_C)</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include "<a class="code" href="threading_8h.html">mbedtls/threading.h</a>"</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment">/*</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> * Error codes</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> */</span></div><div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="hmac__drbg_8h.html#a9b2cc8521b7ac670ecf41c3788b0d847"> 36</a></span> <span class="preprocessor">#define MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG -0x0003 </span></div><div class="line"><a name="l00037"></a><span class="lineno"><a class="line" href="hmac__drbg_8h.html#a0afd76b63cb8715577ba44de755af1fe"> 37</a></span> <span class="preprocessor">#define MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG -0x0005 </span></div><div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="hmac__drbg_8h.html#ae5ccb23af2f8faf60deb292208af66f7"> 38</a></span> <span class="preprocessor">#define MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR -0x0007 </span></div><div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="hmac__drbg_8h.html#ac384cdd999b9733a5e4a8112c4f14291"> 39</a></span> <span class="preprocessor">#define MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED -0x0009 </span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#if !defined(MBEDTLS_HMAC_DRBG_RESEED_INTERVAL)</span></div><div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="hmac__drbg_8h.html#aa7b7ad2ef442817cc4d48909c39a97e0"> 50</a></span> <span class="preprocessor">#define MBEDTLS_HMAC_DRBG_RESEED_INTERVAL 10000 </span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor">#if !defined(MBEDTLS_HMAC_DRBG_MAX_INPUT)</span></div><div class="line"><a name="l00054"></a><span class="lineno"><a class="line" href="hmac__drbg_8h.html#a10b5abc1576c6a9fa766ce1e01d6e54f"> 54</a></span> <span class="preprocessor">#define MBEDTLS_HMAC_DRBG_MAX_INPUT 256 </span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor">#if !defined(MBEDTLS_HMAC_DRBG_MAX_REQUEST)</span></div><div class="line"><a name="l00058"></a><span class="lineno"><a class="line" href="hmac__drbg_8h.html#a3d3785a3eef7b56ca25df77a3912fbb4"> 58</a></span> <span class="preprocessor">#define MBEDTLS_HMAC_DRBG_MAX_REQUEST 1024 </span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor">#if !defined(MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT)</span></div><div class="line"><a name="l00062"></a><span class="lineno"><a class="line" href="hmac__drbg_8h.html#a8d52d7d5113feb2f54eda19dfd97a942"> 62</a></span> <span class="preprocessor">#define MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT 384 </span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor">#endif</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="comment">/* \} name SECTION: Module settings */</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div><div class="line"><a name="l00067"></a><span class="lineno"><a class="line" href="hmac__drbg_8h.html#acbb59dffae4915b9a17142aaed752c57"> 67</a></span> <span class="preprocessor">#define MBEDTLS_HMAC_DRBG_PR_OFF 0 </span></div><div class="line"><a name="l00068"></a><span class="lineno"><a class="line" href="hmac__drbg_8h.html#ac8c4bb0b84fb1c848cdb5fa240ef5e22"> 68</a></span> <span class="preprocessor">#define MBEDTLS_HMAC_DRBG_PR_ON 1 </span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor">#ifdef __cplusplus</span></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="keyword">extern</span> <span class="stringliteral">"C"</span> {</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div><div class="line"><a name="l00077"></a><span class="lineno"><a class="line" href="structmbedtls__hmac__drbg__context.html"> 77</a></span> <span class="keyword">typedef</span> <span class="keyword">struct</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> {</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="comment">/* Working state: the key K is not stored explicitely,</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"> * but is implied by the HMAC context */</span></div><div class="line"><a name="l00081"></a><span class="lineno"><a class="line" href="structmbedtls__hmac__drbg__context.html#ae5ab42fe02b5f9d26c5b4535e3614a4d"> 81</a></span>  <a class="code" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> <a class="code" href="structmbedtls__hmac__drbg__context.html#ae5ab42fe02b5f9d26c5b4535e3614a4d">md_ctx</a>; </div><div class="line"><a name="l00082"></a><span class="lineno"><a class="line" href="structmbedtls__hmac__drbg__context.html#a3e426c343012174c037a462535d23715"> 82</a></span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> V[<a class="code" href="md_8h.html#ad3e0e65cb5b289a358b83b5af1fdd41b">MBEDTLS_MD_MAX_SIZE</a>]; </div><div class="line"><a name="l00083"></a><span class="lineno"><a class="line" href="structmbedtls__hmac__drbg__context.html#a3bdabbbda4d50c954907f5db1f8cecaf"> 83</a></span>  <span class="keywordtype">int</span> <a class="code" href="structmbedtls__hmac__drbg__context.html#a3bdabbbda4d50c954907f5db1f8cecaf">reseed_counter</a>; </div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="comment">/* Administrative state */</span></div><div class="line"><a name="l00086"></a><span class="lineno"><a class="line" href="structmbedtls__hmac__drbg__context.html#a137d68a6581248a2a6fbe06dae4a830b"> 86</a></span>  <span class="keywordtype">size_t</span> <a class="code" href="structmbedtls__hmac__drbg__context.html#a137d68a6581248a2a6fbe06dae4a830b">entropy_len</a>; </div><div class="line"><a name="l00087"></a><span class="lineno"><a class="line" href="structmbedtls__hmac__drbg__context.html#a2c486e648011f32883056541249f7a80"> 87</a></span>  <span class="keywordtype">int</span> <a class="code" href="structmbedtls__hmac__drbg__context.html#a2c486e648011f32883056541249f7a80">prediction_resistance</a>; </div><div class="line"><a name="l00089"></a><span class="lineno"><a class="line" href="structmbedtls__hmac__drbg__context.html#aa69d31aabb0c213dd5f3ea38b8f3f1ad"> 89</a></span>  <span class="keywordtype">int</span> <a class="code" href="structmbedtls__hmac__drbg__context.html#aa69d31aabb0c213dd5f3ea38b8f3f1ad">reseed_interval</a>; </div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="comment">/* Callbacks */</span></div><div class="line"><a name="l00092"></a><span class="lineno"><a class="line" href="structmbedtls__hmac__drbg__context.html#aab9615a6dcd72775be46bca4197df058"> 92</a></span>  int (*f_entropy)(<span class="keywordtype">void</span> *, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *, size_t); </div><div class="line"><a name="l00093"></a><span class="lineno"><a class="line" href="structmbedtls__hmac__drbg__context.html#a218d146b662c9795b9f05b94fa482790"> 93</a></span>  <span class="keywordtype">void</span> *<a class="code" href="structmbedtls__hmac__drbg__context.html#a218d146b662c9795b9f05b94fa482790">p_entropy</a>; </div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="preprocessor">#if defined(MBEDTLS_THREADING_C)</span></div><div class="line"><a name="l00096"></a><span class="lineno"><a class="line" href="structmbedtls__hmac__drbg__context.html#a4703ebf07efd9b2b768e02a183756ee6"> 96</a></span>  <a class="code" href="structmbedtls__threading__mutex__t.html">mbedtls_threading_mutex_t</a> <a class="code" href="structmbedtls__hmac__drbg__context.html#a4703ebf07efd9b2b768e02a183756ee6">mutex</a>;</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> } <a class="code" href="structmbedtls__hmac__drbg__context.html">mbedtls_hmac_drbg_context</a>;</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="keywordtype">void</span> <a class="code" href="hmac__drbg_8h.html#a10881c328300a9ddb7cd5fe359c18acd">mbedtls_hmac_drbg_init</a>( <a class="code" href="structmbedtls__hmac__drbg__context.html">mbedtls_hmac_drbg_context</a> *ctx );</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="keywordtype">int</span> <a class="code" href="hmac__drbg_8h.html#a0af34e5c68f15dfe714b5da94bce8f74">mbedtls_hmac_drbg_seed</a>( <a class="code" href="structmbedtls__hmac__drbg__context.html">mbedtls_hmac_drbg_context</a> *ctx,</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keyword">const</span> <a class="code" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> * md_info,</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordtype">int</span> (*f_entropy)(<span class="keywordtype">void</span> *, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *, <span class="keywordtype">size_t</span>),</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordtype">void</span> *p_entropy,</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *custom,</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordtype">size_t</span> len );</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="keywordtype">int</span> <a class="code" href="hmac__drbg_8h.html#a45cb3ab23ff6058a4e14f4140ca9f0f4">mbedtls_hmac_drbg_seed_buf</a>( <a class="code" href="structmbedtls__hmac__drbg__context.html">mbedtls_hmac_drbg_context</a> *ctx,</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keyword">const</span> <a class="code" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> * md_info,</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *data, <span class="keywordtype">size_t</span> data_len );</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <span class="keywordtype">void</span> <a class="code" href="hmac__drbg_8h.html#a0a874c42e24bd02c9805be58b3f04083">mbedtls_hmac_drbg_set_prediction_resistance</a>( <a class="code" href="structmbedtls__hmac__drbg__context.html">mbedtls_hmac_drbg_context</a> *ctx,</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordtype">int</span> resistance );</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span> </div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="keywordtype">void</span> <a class="code" href="hmac__drbg_8h.html#a6a396cfe0ab81e07dd676ff75163b474">mbedtls_hmac_drbg_set_entropy_len</a>( <a class="code" href="structmbedtls__hmac__drbg__context.html">mbedtls_hmac_drbg_context</a> *ctx,</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keywordtype">size_t</span> len );</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span> </div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="keywordtype">void</span> <a class="code" href="hmac__drbg_8h.html#a17f9f894c4765e75d66b5b2fc8404fb2">mbedtls_hmac_drbg_set_reseed_interval</a>( <a class="code" href="structmbedtls__hmac__drbg__context.html">mbedtls_hmac_drbg_context</a> *ctx,</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordtype">int</span> interval );</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span> </div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="keywordtype">void</span> <a class="code" href="hmac__drbg_8h.html#a19bdd8733bf4ffdec688367c77f7befa">mbedtls_hmac_drbg_update</a>( <a class="code" href="structmbedtls__hmac__drbg__context.html">mbedtls_hmac_drbg_context</a> *ctx,</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *additional, <span class="keywordtype">size_t</span> add_len );</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span> </div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span> <span class="keywordtype">int</span> <a class="code" href="hmac__drbg_8h.html#a0bc680c3d03de1a82170a3831617b8cf">mbedtls_hmac_drbg_reseed</a>( <a class="code" href="structmbedtls__hmac__drbg__context.html">mbedtls_hmac_drbg_context</a> *ctx,</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *additional, <span class="keywordtype">size_t</span> len );</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span> </div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="keywordtype">int</span> <a class="code" href="hmac__drbg_8h.html#a8829c0b3f094edf8cc144c7185536cd8">mbedtls_hmac_drbg_random_with_add</a>( <span class="keywordtype">void</span> *p_rng,</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <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="l00235"></a><span class="lineno"> 235</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *additional,</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keywordtype">size_t</span> add_len );</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> </div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span> <span class="keywordtype">int</span> <a class="code" href="hmac__drbg_8h.html#aa66cb34019161010448c7e915a972ee6">mbedtls_hmac_drbg_random</a>( <span class="keywordtype">void</span> *p_rng, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *output, <span class="keywordtype">size_t</span> out_len );</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span> </div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="keywordtype">void</span> <a class="code" href="hmac__drbg_8h.html#a41e1f127304b1228d9f134d38e200e8a">mbedtls_hmac_drbg_free</a>( <a class="code" href="structmbedtls__hmac__drbg__context.html">mbedtls_hmac_drbg_context</a> *ctx );</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span> </div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span> <span class="preprocessor">#if defined(MBEDTLS_FS_IO)</span></div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span> </div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span> <span class="keywordtype">int</span> <a class="code" href="hmac__drbg_8h.html#a731a0a6e28f0a8021c7e5e2dc6d515f8">mbedtls_hmac_drbg_write_seed_file</a>( <a class="code" href="structmbedtls__hmac__drbg__context.html">mbedtls_hmac_drbg_context</a> *ctx, <span class="keyword">const</span> <span class="keywordtype">char</span> *path );</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span> </div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="keywordtype">int</span> <a class="code" href="hmac__drbg_8h.html#a07a6569e88af60efb3b567482020d9da">mbedtls_hmac_drbg_update_seed_file</a>( <a class="code" href="structmbedtls__hmac__drbg__context.html">mbedtls_hmac_drbg_context</a> *ctx, <span class="keyword">const</span> <span class="keywordtype">char</span> *path );</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span> <span class="preprocessor">#endif </span><span class="comment">/* MBEDTLS_FS_IO */</span><span class="preprocessor"></span></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> </div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span> <span class="preprocessor">#if defined(MBEDTLS_SELF_TEST)</span></div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span> </div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <span class="keywordtype">int</span> <a class="code" href="hmac__drbg_8h.html#a40765425ba6741ed603707fa582ab3b2">mbedtls_hmac_drbg_self_test</a>( <span class="keywordtype">int</span> verbose );</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span> <span class="preprocessor">#endif</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="preprocessor">#ifdef __cplusplus</span></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> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span> </div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span> <span class="preprocessor">#endif </span><span class="comment">/* hmac_drbg.h */</span><span class="preprocessor"></span></div><div class="ttc" id="hmac__drbg_8h_html_a0af34e5c68f15dfe714b5da94bce8f74"><div class="ttname"><a href="hmac__drbg_8h.html#a0af34e5c68f15dfe714b5da94bce8f74">mbedtls_hmac_drbg_seed</a></div><div class="ttdeci">int mbedtls_hmac_drbg_seed(mbedtls_hmac_drbg_context *ctx, const mbedtls_md_info_t *md_info, int(*f_entropy)(void *, unsigned char *, size_t), void *p_entropy, const unsigned char *custom, size_t len)</div><div class="ttdoc">HMAC_DRBG initial seeding Seed and setup entropy source for future reseeds. </div></div>
<div class="ttc" id="md_8h_html_ad3e0e65cb5b289a358b83b5af1fdd41b"><div class="ttname"><a href="md_8h.html#ad3e0e65cb5b289a358b83b5af1fdd41b">MBEDTLS_MD_MAX_SIZE</a></div><div class="ttdeci">#define MBEDTLS_MD_MAX_SIZE</div><div class="ttdef"><b>Definition:</b> <a href="md_8h_source.html#l00070">md.h:70</a></div></div>
<div class="ttc" id="hmac__drbg_8h_html_a45cb3ab23ff6058a4e14f4140ca9f0f4"><div class="ttname"><a href="hmac__drbg_8h.html#a45cb3ab23ff6058a4e14f4140ca9f0f4">mbedtls_hmac_drbg_seed_buf</a></div><div class="ttdeci">int mbedtls_hmac_drbg_seed_buf(mbedtls_hmac_drbg_context *ctx, const mbedtls_md_info_t *md_info, const unsigned char *data, size_t data_len)</div><div class="ttdoc">Initilisation of simpified HMAC_DRBG (never reseeds). (For use with deterministic ECDSA...</div></div>
<div class="ttc" id="hmac__drbg_8h_html_a17f9f894c4765e75d66b5b2fc8404fb2"><div class="ttname"><a href="hmac__drbg_8h.html#a17f9f894c4765e75d66b5b2fc8404fb2">mbedtls_hmac_drbg_set_reseed_interval</a></div><div class="ttdeci">void mbedtls_hmac_drbg_set_reseed_interval(mbedtls_hmac_drbg_context *ctx, int interval)</div><div class="ttdoc">Set the reseed interval (Default: MBEDTLS_HMAC_DRBG_RESEED_INTERVAL) </div></div>
<div class="ttc" id="structmbedtls__hmac__drbg__context_html"><div class="ttname"><a href="structmbedtls__hmac__drbg__context.html">mbedtls_hmac_drbg_context</a></div><div class="ttdef"><b>Definition:</b> <a href="hmac__drbg_8h_source.html#l00077">hmac_drbg.h:77</a></div></div>
<div class="ttc" id="hmac__drbg_8h_html_a41e1f127304b1228d9f134d38e200e8a"><div class="ttname"><a href="hmac__drbg_8h.html#a41e1f127304b1228d9f134d38e200e8a">mbedtls_hmac_drbg_free</a></div><div class="ttdeci">void mbedtls_hmac_drbg_free(mbedtls_hmac_drbg_context *ctx)</div><div class="ttdoc">Free an HMAC_DRBG context. </div></div>
<div class="ttc" id="hmac__drbg_8h_html_aa66cb34019161010448c7e915a972ee6"><div class="ttname"><a href="hmac__drbg_8h.html#aa66cb34019161010448c7e915a972ee6">mbedtls_hmac_drbg_random</a></div><div class="ttdeci">int mbedtls_hmac_drbg_random(void *p_rng, unsigned char *output, size_t out_len)</div><div class="ttdoc">HMAC_DRBG generate random. </div></div>
<div class="ttc" id="hmac__drbg_8h_html_a40765425ba6741ed603707fa582ab3b2"><div class="ttname"><a href="hmac__drbg_8h.html#a40765425ba6741ed603707fa582ab3b2">mbedtls_hmac_drbg_self_test</a></div><div class="ttdeci">int mbedtls_hmac_drbg_self_test(int verbose)</div><div class="ttdoc">Checkup routine. </div></div>
<div class="ttc" id="structmbedtls__hmac__drbg__context_html_a218d146b662c9795b9f05b94fa482790"><div class="ttname"><a href="structmbedtls__hmac__drbg__context.html#a218d146b662c9795b9f05b94fa482790">mbedtls_hmac_drbg_context::p_entropy</a></div><div class="ttdeci">void * p_entropy</div><div class="ttdef"><b>Definition:</b> <a href="hmac__drbg_8h_source.html#l00093">hmac_drbg.h:93</a></div></div>
<div class="ttc" id="structmbedtls__hmac__drbg__context_html_a4703ebf07efd9b2b768e02a183756ee6"><div class="ttname"><a href="structmbedtls__hmac__drbg__context.html#a4703ebf07efd9b2b768e02a183756ee6">mbedtls_hmac_drbg_context::mutex</a></div><div class="ttdeci">mbedtls_threading_mutex_t mutex</div><div class="ttdef"><b>Definition:</b> <a href="hmac__drbg_8h_source.html#l00096">hmac_drbg.h:96</a></div></div>
<div class="ttc" id="structmbedtls__md__context__t_html"><div class="ttname"><a href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a></div><div class="ttdef"><b>Definition:</b> <a href="md_8h_source.html#l00083">md.h:83</a></div></div>
<div class="ttc" id="structmbedtls__hmac__drbg__context_html_aa69d31aabb0c213dd5f3ea38b8f3f1ad"><div class="ttname"><a href="structmbedtls__hmac__drbg__context.html#aa69d31aabb0c213dd5f3ea38b8f3f1ad">mbedtls_hmac_drbg_context::reseed_interval</a></div><div class="ttdeci">int reseed_interval</div><div class="ttdef"><b>Definition:</b> <a href="hmac__drbg_8h_source.html#l00089">hmac_drbg.h:89</a></div></div>
<div class="ttc" id="structmbedtls__hmac__drbg__context_html_a137d68a6581248a2a6fbe06dae4a830b"><div class="ttname"><a href="structmbedtls__hmac__drbg__context.html#a137d68a6581248a2a6fbe06dae4a830b">mbedtls_hmac_drbg_context::entropy_len</a></div><div class="ttdeci">size_t entropy_len</div><div class="ttdef"><b>Definition:</b> <a href="hmac__drbg_8h_source.html#l00086">hmac_drbg.h:86</a></div></div>
<div class="ttc" id="threading_8h_html"><div class="ttname"><a href="threading_8h.html">threading.h</a></div><div class="ttdoc">Threading abstraction layer. </div></div>
<div class="ttc" id="structmbedtls__threading__mutex__t_html"><div class="ttname"><a href="structmbedtls__threading__mutex__t.html">mbedtls_threading_mutex_t</a></div><div class="ttdef"><b>Definition:</b> <a href="threading_8h_source.html#l00045">threading.h:45</a></div></div>
<div class="ttc" id="hmac__drbg_8h_html_a07a6569e88af60efb3b567482020d9da"><div class="ttname"><a href="hmac__drbg_8h.html#a07a6569e88af60efb3b567482020d9da">mbedtls_hmac_drbg_update_seed_file</a></div><div class="ttdeci">int mbedtls_hmac_drbg_update_seed_file(mbedtls_hmac_drbg_context *ctx, const char *path)</div><div class="ttdoc">Read and update a seed file. Seed is added to this instance. </div></div>
<div class="ttc" id="hmac__drbg_8h_html_a19bdd8733bf4ffdec688367c77f7befa"><div class="ttname"><a href="hmac__drbg_8h.html#a19bdd8733bf4ffdec688367c77f7befa">mbedtls_hmac_drbg_update</a></div><div class="ttdeci">void mbedtls_hmac_drbg_update(mbedtls_hmac_drbg_context *ctx, const unsigned char *additional, size_t add_len)</div><div class="ttdoc">HMAC_DRBG update state. </div></div>
<div class="ttc" id="md_8h_html"><div class="ttname"><a href="md_8h.html">md.h</a></div><div class="ttdoc">The generic message-digest wrapper. </div></div>
<div class="ttc" id="hmac__drbg_8h_html_a10881c328300a9ddb7cd5fe359c18acd"><div class="ttname"><a href="hmac__drbg_8h.html#a10881c328300a9ddb7cd5fe359c18acd">mbedtls_hmac_drbg_init</a></div><div class="ttdeci">void mbedtls_hmac_drbg_init(mbedtls_hmac_drbg_context *ctx)</div><div class="ttdoc">HMAC_DRBG context initialization Makes the context ready for mbedtls_hmac_drbg_seed(), mbedtls_hmac_drbg_seed_buf() or mbedtls_hmac_drbg_free(). </div></div>
<div class="ttc" id="structmbedtls__hmac__drbg__context_html_a2c486e648011f32883056541249f7a80"><div class="ttname"><a href="structmbedtls__hmac__drbg__context.html#a2c486e648011f32883056541249f7a80">mbedtls_hmac_drbg_context::prediction_resistance</a></div><div class="ttdeci">int prediction_resistance</div><div class="ttdef"><b>Definition:</b> <a href="hmac__drbg_8h_source.html#l00087">hmac_drbg.h:87</a></div></div>
<div class="ttc" id="hmac__drbg_8h_html_a8829c0b3f094edf8cc144c7185536cd8"><div class="ttname"><a href="hmac__drbg_8h.html#a8829c0b3f094edf8cc144c7185536cd8">mbedtls_hmac_drbg_random_with_add</a></div><div class="ttdeci">int mbedtls_hmac_drbg_random_with_add(void *p_rng, unsigned char *output, size_t output_len, const unsigned char *additional, size_t add_len)</div><div class="ttdoc">HMAC_DRBG generate random with additional update input. </div></div>
<div class="ttc" id="hmac__drbg_8h_html_a0bc680c3d03de1a82170a3831617b8cf"><div class="ttname"><a href="hmac__drbg_8h.html#a0bc680c3d03de1a82170a3831617b8cf">mbedtls_hmac_drbg_reseed</a></div><div class="ttdeci">int mbedtls_hmac_drbg_reseed(mbedtls_hmac_drbg_context *ctx, const unsigned char *additional, size_t len)</div><div class="ttdoc">HMAC_DRBG reseeding (extracts data from entropy source) </div></div>
<div class="ttc" id="md_8h_html_a496e73a6f229eba89b4abd9955822adb"><div class="ttname"><a href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a></div><div class="ttdeci">struct mbedtls_md_info_t mbedtls_md_info_t</div><div class="ttdef"><b>Definition:</b> <a href="md_8h_source.html#l00078">md.h:78</a></div></div>
<div class="ttc" id="structmbedtls__hmac__drbg__context_html_ae5ab42fe02b5f9d26c5b4535e3614a4d"><div class="ttname"><a href="structmbedtls__hmac__drbg__context.html#ae5ab42fe02b5f9d26c5b4535e3614a4d">mbedtls_hmac_drbg_context::md_ctx</a></div><div class="ttdeci">mbedtls_md_context_t md_ctx</div><div class="ttdef"><b>Definition:</b> <a href="hmac__drbg_8h_source.html#l00081">hmac_drbg.h:81</a></div></div>
<div class="ttc" id="hmac__drbg_8h_html_a731a0a6e28f0a8021c7e5e2dc6d515f8"><div class="ttname"><a href="hmac__drbg_8h.html#a731a0a6e28f0a8021c7e5e2dc6d515f8">mbedtls_hmac_drbg_write_seed_file</a></div><div class="ttdeci">int mbedtls_hmac_drbg_write_seed_file(mbedtls_hmac_drbg_context *ctx, const char *path)</div><div class="ttdoc">Write a seed file. </div></div>
<div class="ttc" id="hmac__drbg_8h_html_a6a396cfe0ab81e07dd676ff75163b474"><div class="ttname"><a href="hmac__drbg_8h.html#a6a396cfe0ab81e07dd676ff75163b474">mbedtls_hmac_drbg_set_entropy_len</a></div><div class="ttdeci">void mbedtls_hmac_drbg_set_entropy_len(mbedtls_hmac_drbg_context *ctx, size_t len)</div><div class="ttdoc">Set the amount of entropy grabbed on each reseed (Default: given by the security strength, which depends on the hash used, see mbedtls_hmac_drbg_init() ) </div></div>
<div class="ttc" id="structmbedtls__hmac__drbg__context_html_a3bdabbbda4d50c954907f5db1f8cecaf"><div class="ttname"><a href="structmbedtls__hmac__drbg__context.html#a3bdabbbda4d50c954907f5db1f8cecaf">mbedtls_hmac_drbg_context::reseed_counter</a></div><div class="ttdeci">int reseed_counter</div><div class="ttdef"><b>Definition:</b> <a href="hmac__drbg_8h_source.html#l00083">hmac_drbg.h:83</a></div></div>
<div class="ttc" id="hmac__drbg_8h_html_a0a874c42e24bd02c9805be58b3f04083"><div class="ttname"><a href="hmac__drbg_8h.html#a0a874c42e24bd02c9805be58b3f04083">mbedtls_hmac_drbg_set_prediction_resistance</a></div><div class="ttdeci">void mbedtls_hmac_drbg_set_prediction_resistance(mbedtls_hmac_drbg_context *ctx, int resistance)</div><div class="ttdoc">Enable / disable prediction resistance (Default: Off) </div></div>
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