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<p>SHA-224 and SHA-256 cryptographic hash function.
<a href="#details">More...</a></p>
<div class="textblock"><code>#include "<a class="el" href="config_8h_source.html">config.h</a>"</code><br/>
<code>#include <string.h></code><br/>
<code>#include <inttypes.h></code><br/>
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Include dependency graph for sha256.h:</div>
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<div class="center"><img src="sha256_8h__incl.png" border="0" usemap="#sha256_8h" alt=""/></div>
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This graph shows which files directly or indirectly include this file:</div>
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<p><a href="sha256_8h_source.html">Go to the source code of this file.</a></p>
<table class="memberdecls">
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Data Structures</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structsha256__context.html">sha256_context</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">SHA-256 context structure. <a href="structsha256__context.html#details">More...</a><br/></td></tr>
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Macros</h2></td></tr>
<tr class="memitem:a3aefddbb99ed99898d7ccd1d58301205"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="sha256_8h.html#a3aefddbb99ed99898d7ccd1d58301205">POLARSSL_ERR_SHA256_FILE_IO_ERROR</a>   -0x0078</td></tr>
<tr class="memdesc:a3aefddbb99ed99898d7ccd1d58301205"><td class="mdescLeft"> </td><td class="mdescRight">Read/write error in file. <a href="#a3aefddbb99ed99898d7ccd1d58301205">More...</a><br/></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:afd98ce0e59b312d20c586b0c78890f4e"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha256_8h.html#afd98ce0e59b312d20c586b0c78890f4e">sha256_init</a> (<a class="el" href="structsha256__context.html">sha256_context</a> *ctx)</td></tr>
<tr class="memdesc:afd98ce0e59b312d20c586b0c78890f4e"><td class="mdescLeft"> </td><td class="mdescRight">Initialize SHA-256 context. <a href="#afd98ce0e59b312d20c586b0c78890f4e">More...</a><br/></td></tr>
<tr class="separator:afd98ce0e59b312d20c586b0c78890f4e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a671c45e9f4d3b1f9af1560892f025768"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha256_8h.html#a671c45e9f4d3b1f9af1560892f025768">sha256_free</a> (<a class="el" href="structsha256__context.html">sha256_context</a> *ctx)</td></tr>
<tr class="memdesc:a671c45e9f4d3b1f9af1560892f025768"><td class="mdescLeft"> </td><td class="mdescRight">Clear SHA-256 context. <a href="#a671c45e9f4d3b1f9af1560892f025768">More...</a><br/></td></tr>
<tr class="separator:a671c45e9f4d3b1f9af1560892f025768"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ae8e12a0ae383d163ed4d5ead3b96c4de"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha256_8h.html#ae8e12a0ae383d163ed4d5ead3b96c4de">sha256_starts</a> (<a class="el" href="structsha256__context.html">sha256_context</a> *ctx, int is224)</td></tr>
<tr class="memdesc:ae8e12a0ae383d163ed4d5ead3b96c4de"><td class="mdescLeft"> </td><td class="mdescRight">SHA-256 context setup. <a href="#ae8e12a0ae383d163ed4d5ead3b96c4de">More...</a><br/></td></tr>
<tr class="separator:ae8e12a0ae383d163ed4d5ead3b96c4de"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad6a332874701f3170d35dc42dec89428"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha256_8h.html#ad6a332874701f3170d35dc42dec89428">sha256_update</a> (<a class="el" href="structsha256__context.html">sha256_context</a> *ctx, const unsigned char *input, size_t ilen)</td></tr>
<tr class="memdesc:ad6a332874701f3170d35dc42dec89428"><td class="mdescLeft"> </td><td class="mdescRight">SHA-256 process buffer. <a href="#ad6a332874701f3170d35dc42dec89428">More...</a><br/></td></tr>
<tr class="separator:ad6a332874701f3170d35dc42dec89428"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a2336e05cf0778065a128557c3e69fe53"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha256_8h.html#a2336e05cf0778065a128557c3e69fe53">sha256_finish</a> (<a class="el" href="structsha256__context.html">sha256_context</a> *ctx, unsigned char output[32])</td></tr>
<tr class="memdesc:a2336e05cf0778065a128557c3e69fe53"><td class="mdescLeft"> </td><td class="mdescRight">SHA-256 final digest. <a href="#a2336e05cf0778065a128557c3e69fe53">More...</a><br/></td></tr>
<tr class="separator:a2336e05cf0778065a128557c3e69fe53"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a7d9516c49ffb7c4533c19aef3d5da3e8"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha256_8h.html#a7d9516c49ffb7c4533c19aef3d5da3e8">sha256_process</a> (<a class="el" href="structsha256__context.html">sha256_context</a> *ctx, const unsigned char data[64])</td></tr>
<tr class="separator:a7d9516c49ffb7c4533c19aef3d5da3e8"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a67457fa83af0439e80538d99426eb39a"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha256_8h.html#a67457fa83af0439e80538d99426eb39a">sha256</a> (const unsigned char *input, size_t ilen, unsigned char output[32], int is224)</td></tr>
<tr class="memdesc:a67457fa83af0439e80538d99426eb39a"><td class="mdescLeft"> </td><td class="mdescRight">Output = SHA-256( input buffer ) <a href="#a67457fa83af0439e80538d99426eb39a">More...</a><br/></td></tr>
<tr class="separator:a67457fa83af0439e80538d99426eb39a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a28c036f06f6c9bef50ea366d13e25da4"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="sha256_8h.html#a28c036f06f6c9bef50ea366d13e25da4">sha256_file</a> (const char *path, unsigned char output[32], int is224)</td></tr>
<tr class="memdesc:a28c036f06f6c9bef50ea366d13e25da4"><td class="mdescLeft"> </td><td class="mdescRight">Output = SHA-256( file contents ) <a href="#a28c036f06f6c9bef50ea366d13e25da4">More...</a><br/></td></tr>
<tr class="separator:a28c036f06f6c9bef50ea366d13e25da4"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a9149920697b6ca77185fb8c25d29ed2d"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha256_8h.html#a9149920697b6ca77185fb8c25d29ed2d">sha256_hmac_starts</a> (<a class="el" href="structsha256__context.html">sha256_context</a> *ctx, const unsigned char *key, size_t keylen, int is224)</td></tr>
<tr class="memdesc:a9149920697b6ca77185fb8c25d29ed2d"><td class="mdescLeft"> </td><td class="mdescRight">SHA-256 HMAC context setup. <a href="#a9149920697b6ca77185fb8c25d29ed2d">More...</a><br/></td></tr>
<tr class="separator:a9149920697b6ca77185fb8c25d29ed2d"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a4dbd9d5d390a0cf457e1dab00923167b"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha256_8h.html#a4dbd9d5d390a0cf457e1dab00923167b">sha256_hmac_update</a> (<a class="el" href="structsha256__context.html">sha256_context</a> *ctx, const unsigned char *input, size_t ilen)</td></tr>
<tr class="memdesc:a4dbd9d5d390a0cf457e1dab00923167b"><td class="mdescLeft"> </td><td class="mdescRight">SHA-256 HMAC process buffer. <a href="#a4dbd9d5d390a0cf457e1dab00923167b">More...</a><br/></td></tr>
<tr class="separator:a4dbd9d5d390a0cf457e1dab00923167b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a2c0da55b9f26e74f14f1d1764932fc6a"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha256_8h.html#a2c0da55b9f26e74f14f1d1764932fc6a">sha256_hmac_finish</a> (<a class="el" href="structsha256__context.html">sha256_context</a> *ctx, unsigned char output[32])</td></tr>
<tr class="memdesc:a2c0da55b9f26e74f14f1d1764932fc6a"><td class="mdescLeft"> </td><td class="mdescRight">SHA-256 HMAC final digest. <a href="#a2c0da55b9f26e74f14f1d1764932fc6a">More...</a><br/></td></tr>
<tr class="separator:a2c0da55b9f26e74f14f1d1764932fc6a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a7ffbdf4d843ecf7231d89d279ec57abd"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha256_8h.html#a7ffbdf4d843ecf7231d89d279ec57abd">sha256_hmac_reset</a> (<a class="el" href="structsha256__context.html">sha256_context</a> *ctx)</td></tr>
<tr class="memdesc:a7ffbdf4d843ecf7231d89d279ec57abd"><td class="mdescLeft"> </td><td class="mdescRight">SHA-256 HMAC context reset. <a href="#a7ffbdf4d843ecf7231d89d279ec57abd">More...</a><br/></td></tr>
<tr class="separator:a7ffbdf4d843ecf7231d89d279ec57abd"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:acdc08a6c1083b3a1ffb0bd5850272054"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha256_8h.html#acdc08a6c1083b3a1ffb0bd5850272054">sha256_hmac</a> (const unsigned char *key, size_t keylen, const unsigned char *input, size_t ilen, unsigned char output[32], int is224)</td></tr>
<tr class="memdesc:acdc08a6c1083b3a1ffb0bd5850272054"><td class="mdescLeft"> </td><td class="mdescRight">Output = HMAC-SHA-256( hmac key, input buffer ) <a href="#acdc08a6c1083b3a1ffb0bd5850272054">More...</a><br/></td></tr>
<tr class="separator:acdc08a6c1083b3a1ffb0bd5850272054"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a471f1c466477f7073aba0cf61d109991"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="sha256_8h.html#a471f1c466477f7073aba0cf61d109991">sha256_self_test</a> (int verbose)</td></tr>
<tr class="memdesc:a471f1c466477f7073aba0cf61d109991"><td class="mdescLeft"> </td><td class="mdescRight">Checkup routine. <a href="#a471f1c466477f7073aba0cf61d109991">More...</a><br/></td></tr>
<tr class="separator:a471f1c466477f7073aba0cf61d109991"><td class="memSeparator" colspan="2"> </td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>SHA-224 and SHA-256 cryptographic hash function. </p>
<p>Copyright (C) 2006-2014, Brainspark B.V.</p>
<p>This file is part of PolarSSL (<a href="http://www.polarssl.org">http://www.polarssl.org</a>) Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org></p>
<p>All rights reserved.</p>
<p>This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.</p>
<p>This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.</p>
<p>You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. </p>
<p>Definition in file <a class="el" href="sha256_8h_source.html">sha256.h</a>.</p>
</div><h2 class="groupheader">Macro Definition Documentation</h2>
<a class="anchor" id="a3aefddbb99ed99898d7ccd1d58301205"></a>
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<td class="memname">#define POLARSSL_ERR_SHA256_FILE_IO_ERROR   -0x0078</td>
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<p>Read/write error in file. </p>
<p>Definition at line <a class="el" href="sha256_8h_source.html#l00045">45</a> of file <a class="el" href="sha256_8h_source.html">sha256.h</a>.</p>
</div>
</div>
<h2 class="groupheader">Function Documentation</h2>
<a class="anchor" id="a67457fa83af0439e80538d99426eb39a"></a>
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<td class="memname">void sha256 </td>
<td>(</td>
<td class="paramtype">const unsigned char * </td>
<td class="paramname"><em>input</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>ilen</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned char </td>
<td class="paramname"><em>output</em>[32], </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>is224</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>Output = SHA-256( input buffer ) </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">input</td><td>buffer holding the data </td></tr>
<tr><td class="paramname">ilen</td><td>length of the input data </td></tr>
<tr><td class="paramname">output</td><td>SHA-224/256 checksum result </td></tr>
<tr><td class="paramname">is224</td><td>0 = use SHA256, 1 = use SHA224 </td></tr>
</table>
</dd>
</dl>
<p>Referenced by <a class="el" href="compat-1_82_8h_source.html#l00078">sha2()</a>.</p>
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<td class="memname">int sha256_file </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>path</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned char </td>
<td class="paramname"><em>output</em>[32], </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>is224</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>Output = SHA-256( file contents ) </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">path</td><td>input file name </td></tr>
<tr><td class="paramname">output</td><td>SHA-224/256 checksum result </td></tr>
<tr><td class="paramname">is224</td><td>0 = use SHA256, 1 = use SHA224</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 if successful, or POLARSSL_ERR_SHA256_FILE_IO_ERROR </dd></dl>
<p>Referenced by <a class="el" href="compat-1_82_8h_source.html#l00075">sha2_file()</a>.</p>
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<td class="memname">void sha256_finish </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structsha256__context.html">sha256_context</a> * </td>
<td class="paramname"><em>ctx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned char </td>
<td class="paramname"><em>output</em>[32] </td>
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<tr>
<td></td>
<td>)</td>
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<p>SHA-256 final digest. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>SHA-256 context </td></tr>
<tr><td class="paramname">output</td><td>SHA-224/256 checksum result </td></tr>
</table>
</dd>
</dl>
<p>Referenced by <a class="el" href="compat-1_82_8h_source.html#l00072">sha2_finish()</a>.</p>
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<td class="memname">void sha256_free </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structsha256__context.html">sha256_context</a> * </td>
<td class="paramname"><em>ctx</em></td><td>)</td>
<td></td>
</tr>
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<p>Clear SHA-256 context. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>SHA-256 context to be cleared </td></tr>
</table>
</dd>
</dl>
</div>
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<a class="anchor" id="acdc08a6c1083b3a1ffb0bd5850272054"></a>
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<td class="memname">void sha256_hmac </td>
<td>(</td>
<td class="paramtype">const unsigned char * </td>
<td class="paramname"><em>key</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>keylen</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const unsigned char * </td>
<td class="paramname"><em>input</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>ilen</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned char </td>
<td class="paramname"><em>output</em>[32], </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>is224</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Output = HMAC-SHA-256( hmac key, input buffer ) </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">key</td><td>HMAC secret key </td></tr>
<tr><td class="paramname">keylen</td><td>length of the HMAC key </td></tr>
<tr><td class="paramname">input</td><td>buffer holding the data </td></tr>
<tr><td class="paramname">ilen</td><td>length of the input data </td></tr>
<tr><td class="paramname">output</td><td>HMAC-SHA-224/256 result </td></tr>
<tr><td class="paramname">is224</td><td>0 = use SHA256, 1 = use SHA224 </td></tr>
</table>
</dd>
</dl>
<p>Referenced by <a class="el" href="compat-1_82_8h_source.html#l00095">sha2_hmac()</a>.</p>
</div>
</div>
<a class="anchor" id="a2c0da55b9f26e74f14f1d1764932fc6a"></a>
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<table class="memname">
<tr>
<td class="memname">void sha256_hmac_finish </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structsha256__context.html">sha256_context</a> * </td>
<td class="paramname"><em>ctx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned char </td>
<td class="paramname"><em>output</em>[32] </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>SHA-256 HMAC final digest. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>HMAC context </td></tr>
<tr><td class="paramname">output</td><td>SHA-224/256 HMAC checksum result </td></tr>
</table>
</dd>
</dl>
<p>Referenced by <a class="el" href="compat-1_82_8h_source.html#l00089">sha2_hmac_finish()</a>.</p>
</div>
</div>
<a class="anchor" id="a7ffbdf4d843ecf7231d89d279ec57abd"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void sha256_hmac_reset </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structsha256__context.html">sha256_context</a> * </td>
<td class="paramname"><em>ctx</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>SHA-256 HMAC context reset. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>HMAC context to be reset </td></tr>
</table>
</dd>
</dl>
<p>Referenced by <a class="el" href="compat-1_82_8h_source.html#l00092">sha2_hmac_reset()</a>.</p>
</div>
</div>
<a class="anchor" id="a9149920697b6ca77185fb8c25d29ed2d"></a>
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<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void sha256_hmac_starts </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structsha256__context.html">sha256_context</a> * </td>
<td class="paramname"><em>ctx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const unsigned char * </td>
<td class="paramname"><em>key</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>keylen</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>is224</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>SHA-256 HMAC context setup. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>HMAC context to be initialized </td></tr>
<tr><td class="paramname">key</td><td>HMAC secret key </td></tr>
<tr><td class="paramname">keylen</td><td>length of the HMAC key </td></tr>
<tr><td class="paramname">is224</td><td>0 = use SHA256, 1 = use SHA224 </td></tr>
</table>
</dd>
</dl>
<p>Referenced by <a class="el" href="compat-1_82_8h_source.html#l00082">sha2_hmac_starts()</a>.</p>
</div>
</div>
<a class="anchor" id="a4dbd9d5d390a0cf457e1dab00923167b"></a>
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<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void sha256_hmac_update </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structsha256__context.html">sha256_context</a> * </td>
<td class="paramname"><em>ctx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const unsigned char * </td>
<td class="paramname"><em>input</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>ilen</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>SHA-256 HMAC process buffer. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>HMAC context </td></tr>
<tr><td class="paramname">input</td><td>buffer holding the data </td></tr>
<tr><td class="paramname">ilen</td><td>length of the input data </td></tr>
</table>
</dd>
</dl>
<p>Referenced by <a class="el" href="compat-1_82_8h_source.html#l00086">sha2_hmac_update()</a>.</p>
</div>
</div>
<a class="anchor" id="afd98ce0e59b312d20c586b0c78890f4e"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void sha256_init </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structsha256__context.html">sha256_context</a> * </td>
<td class="paramname"><em>ctx</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Initialize SHA-256 context. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>SHA-256 context to be initialized </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="a7d9516c49ffb7c4533c19aef3d5da3e8"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void sha256_process </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structsha256__context.html">sha256_context</a> * </td>
<td class="paramname"><em>ctx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const unsigned char </td>
<td class="paramname"><em>data</em>[64] </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
</div>
</div>
<a class="anchor" id="a471f1c466477f7073aba0cf61d109991"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int sha256_self_test </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>verbose</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Checkup routine. </p>
<dl class="section return"><dt>Returns</dt><dd>0 if successful, or 1 if the test failed </dd></dl>
<p>Referenced by <a class="el" href="compat-1_82_8h_source.html#l00100">sha2_self_test()</a>.</p>
</div>
</div>
<a class="anchor" id="ae8e12a0ae383d163ed4d5ead3b96c4de"></a>
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<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void sha256_starts </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structsha256__context.html">sha256_context</a> * </td>
<td class="paramname"><em>ctx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>is224</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>SHA-256 context setup. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>context to be initialized </td></tr>
<tr><td class="paramname">is224</td><td>0 = use SHA256, 1 = use SHA224 </td></tr>
</table>
</dd>
</dl>
<p>Referenced by <a class="el" href="compat-1_82_8h_source.html#l00065">sha2_starts()</a>.</p>
</div>
</div>
<a class="anchor" id="ad6a332874701f3170d35dc42dec89428"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void sha256_update </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structsha256__context.html">sha256_context</a> * </td>
<td class="paramname"><em>ctx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const unsigned char * </td>
<td class="paramname"><em>input</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>ilen</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>SHA-256 process buffer. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>SHA-256 context </td></tr>
<tr><td class="paramname">input</td><td>buffer holding the data </td></tr>
<tr><td class="paramname">ilen</td><td>length of the input data </td></tr>
</table>
</dd>
</dl>
<p>Referenced by <a class="el" href="compat-1_82_8h_source.html#l00068">sha2_update()</a>.</p>
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