<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <title>PolarSSL: polarssl/sha2.h File Reference</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <link href="search/search.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="search/search.js"></script> <link href="doxygen.css" rel="stylesheet" type="text/css"/> </head> <body onload='searchBox.OnSelectItem(0);'> <!-- Generated by Doxygen 1.7.4 --> <script type="text/javascript"><!-- var searchBox = new SearchBox("searchBox", "search",false,'Search'); --></script> <div id="top"> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td style="padding-left: 0.5em;"> <div id="projectname">PolarSSL</div> </td> </tr> </tbody> </table> </div> <div id="navrow1" class="tabs"> <ul class="tablist"> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="annotated.html"><span>Classes</span></a></li> <li class="current"><a href="files.html"><span>Files</span></a></li> <li id="searchli"> <div id="MSearchBox" class="MSearchBoxInactive"> <span class="left"> <img id="MSearchSelect" src="search/mag_sel.png" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return searchBox.OnSearchSelectHide()" alt=""/> <input type="text" id="MSearchField" value="Search" accesskey="S" onfocus="searchBox.OnSearchFieldFocus(true)" onblur="searchBox.OnSearchFieldFocus(false)" onkeyup="searchBox.OnSearchFieldChange(event)"/> </span><span class="right"> <a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a> </span> </div> </li> </ul> </div> <div id="navrow2" class="tabs2"> <ul class="tablist"> <li><a href="files.html"><span>File List</span></a></li> <li><a href="globals.html"><span>File Members</span></a></li> </ul> </div> </div> <div class="header"> <div class="summary"> <a href="#nested-classes">Classes</a> | <a href="#func-members">Functions</a> </div> <div class="headertitle"> <div class="title">polarssl/sha2.h File Reference</div> </div> </div> <div class="contents"> <p><a href="sha2_8h_source.html">Go to the source code of this file.</a></p> <table class="memberdecls"> <tr><td colspan="2"><h2><a name="nested-classes"></a> Classes</h2></td></tr> <tr><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structsha2__context.html">sha2_context</a></td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">SHA-256 context structure. <a href="structsha2__context.html#details">More...</a><br/></td></tr> <tr><td colspan="2"><h2><a name="func-members"></a> Functions</h2></td></tr> <tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha2_8h.html#ae01444aa81c862eb74f0545b8d05371a">sha2_starts</a> (<a class="el" href="structsha2__context.html">sha2_context</a> *ctx, int is224)</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">SHA-256 context setup. <a href="#ae01444aa81c862eb74f0545b8d05371a"></a><br/></td></tr> <tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha2_8h.html#a364a95b93b92a5041d529c6e89dde122">sha2_update</a> (<a class="el" href="structsha2__context.html">sha2_context</a> *ctx, const unsigned char *input, int ilen)</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">SHA-256 process buffer. <a href="#a364a95b93b92a5041d529c6e89dde122"></a><br/></td></tr> <tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha2_8h.html#a2762ab9bf6601a7ab2f2bee3eb72b22a">sha2_finish</a> (<a class="el" href="structsha2__context.html">sha2_context</a> *ctx, unsigned char output[32])</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">SHA-256 final digest. <a href="#a2762ab9bf6601a7ab2f2bee3eb72b22a"></a><br/></td></tr> <tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha2_8h.html#a5a1ef55622a4fcbee944491c6ca3058c">sha2</a> (const unsigned char *input, int ilen, unsigned char output[32], int is224)</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Output = SHA-256( input buffer ) <a href="#a5a1ef55622a4fcbee944491c6ca3058c"></a><br/></td></tr> <tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="sha2_8h.html#a9e1df394dc525040d6afe958273baf73">sha2_file</a> (const char *path, unsigned char output[32], int is224)</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Output = SHA-256( file contents ) <a href="#a9e1df394dc525040d6afe958273baf73"></a><br/></td></tr> <tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha2_8h.html#a4ebd1d33dee5a9eb07b06ccb5f61233a">sha2_hmac_starts</a> (<a class="el" href="structsha2__context.html">sha2_context</a> *ctx, const unsigned char *key, int keylen, int is224)</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">SHA-256 HMAC context setup. <a href="#a4ebd1d33dee5a9eb07b06ccb5f61233a"></a><br/></td></tr> <tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha2_8h.html#af2e7a2ff0d5f85f19747c60bc0bf3b71">sha2_hmac_update</a> (<a class="el" href="structsha2__context.html">sha2_context</a> *ctx, const unsigned char *input, int ilen)</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">SHA-256 HMAC process buffer. <a href="#af2e7a2ff0d5f85f19747c60bc0bf3b71"></a><br/></td></tr> <tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha2_8h.html#afad853fc439a23fe3595d3486649d3cf">sha2_hmac_finish</a> (<a class="el" href="structsha2__context.html">sha2_context</a> *ctx, unsigned char output[32])</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">SHA-256 HMAC final digest. <a href="#afad853fc439a23fe3595d3486649d3cf"></a><br/></td></tr> <tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha2_8h.html#a7f9ced2b8aec3cdd9bc7cc3ae5892816">sha2_hmac_reset</a> (<a class="el" href="structsha2__context.html">sha2_context</a> *ctx)</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">SHA-256 HMAC context reset. <a href="#a7f9ced2b8aec3cdd9bc7cc3ae5892816"></a><br/></td></tr> <tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sha2_8h.html#a61aa655efa012132ade2807edd03a841">sha2_hmac</a> (const unsigned char *key, int keylen, const unsigned char *input, int ilen, unsigned char output[32], int is224)</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Output = HMAC-SHA-256( hmac key, input buffer ) <a href="#a61aa655efa012132ade2807edd03a841"></a><br/></td></tr> <tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="sha2_8h.html#a8a7026f38413c81e28966631a8dbc004">sha2_self_test</a> (int verbose)</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Checkup routine. <a href="#a8a7026f38413c81e28966631a8dbc004"></a><br/></td></tr> </table> <hr/><a name="details" id="details"></a><h2>Detailed Description</h2> <div class="textblock"><p>Copyright (C) 2006-2010, 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> </div><hr/><h2>Function Documentation</h2> <a class="anchor" id="a5a1ef55622a4fcbee944491c6ca3058c"></a><!-- doxytag: member="sha2.h::sha2" ref="a5a1ef55622a4fcbee944491c6ca3058c" args="(const unsigned char *input, int ilen, unsigned char output[32], int is224)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void sha2 </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">int </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 = SHA-256( input buffer ) </p> <dl><dt><b>Parameters:</b></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> </div> </div> <a class="anchor" id="a9e1df394dc525040d6afe958273baf73"></a><!-- doxytag: member="sha2.h::sha2_file" ref="a9e1df394dc525040d6afe958273baf73" args="(const char *path, unsigned char output[32], int is224)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">int sha2_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> </tr> </table> </div> <div class="memdoc"> <p>Output = SHA-256( file contents ) </p> <dl><dt><b>Parameters:</b></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="return"><dt><b>Returns:</b></dt><dd>0 if successful, 1 if fopen failed, or 2 if fread failed </dd></dl> </div> </div> <a class="anchor" id="a2762ab9bf6601a7ab2f2bee3eb72b22a"></a><!-- doxytag: member="sha2.h::sha2_finish" ref="a2762ab9bf6601a7ab2f2bee3eb72b22a" args="(sha2_context *ctx, unsigned char output[32])" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void sha2_finish </td> <td>(</td> <td class="paramtype"><a class="el" href="structsha2__context.html">sha2_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 final digest. </p> <dl><dt><b>Parameters:</b></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> </div> </div> <a class="anchor" id="a61aa655efa012132ade2807edd03a841"></a><!-- doxytag: member="sha2.h::sha2_hmac" ref="a61aa655efa012132ade2807edd03a841" args="(const unsigned char *key, int keylen, const unsigned char *input, int ilen, unsigned char output[32], int is224)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void sha2_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">int </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">int </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><dt><b>Parameters:</b></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> </div> </div> <a class="anchor" id="afad853fc439a23fe3595d3486649d3cf"></a><!-- doxytag: member="sha2.h::sha2_hmac_finish" ref="afad853fc439a23fe3595d3486649d3cf" args="(sha2_context *ctx, unsigned char output[32])" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void sha2_hmac_finish </td> <td>(</td> <td class="paramtype"><a class="el" href="structsha2__context.html">sha2_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><dt><b>Parameters:</b></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> </div> </div> <a class="anchor" id="a7f9ced2b8aec3cdd9bc7cc3ae5892816"></a><!-- doxytag: member="sha2.h::sha2_hmac_reset" ref="a7f9ced2b8aec3cdd9bc7cc3ae5892816" args="(sha2_context *ctx)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void sha2_hmac_reset </td> <td>(</td> <td class="paramtype"><a class="el" href="structsha2__context.html">sha2_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><dt><b>Parameters:</b></dt><dd> <table class="params"> <tr><td class="paramname">ctx</td><td>HMAC context to be reset </td></tr> </table> </dd> </dl> </div> </div> <a class="anchor" id="a4ebd1d33dee5a9eb07b06ccb5f61233a"></a><!-- doxytag: member="sha2.h::sha2_hmac_starts" ref="a4ebd1d33dee5a9eb07b06ccb5f61233a" args="(sha2_context *ctx, const unsigned char *key, int keylen, int is224)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void sha2_hmac_starts </td> <td>(</td> <td class="paramtype"><a class="el" href="structsha2__context.html">sha2_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">int </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><dt><b>Parameters:</b></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> </div> </div> <a class="anchor" id="af2e7a2ff0d5f85f19747c60bc0bf3b71"></a><!-- doxytag: member="sha2.h::sha2_hmac_update" ref="af2e7a2ff0d5f85f19747c60bc0bf3b71" args="(sha2_context *ctx, const unsigned char *input, int ilen)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void sha2_hmac_update </td> <td>(</td> <td class="paramtype"><a class="el" href="structsha2__context.html">sha2_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">int </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><dt><b>Parameters:</b></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> </div> </div> <a class="anchor" id="a8a7026f38413c81e28966631a8dbc004"></a><!-- doxytag: member="sha2.h::sha2_self_test" ref="a8a7026f38413c81e28966631a8dbc004" args="(int verbose)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">int sha2_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="return"><dt><b>Returns:</b></dt><dd>0 if successful, or 1 if the test failed </dd></dl> </div> </div> <a class="anchor" id="ae01444aa81c862eb74f0545b8d05371a"></a><!-- doxytag: member="sha2.h::sha2_starts" ref="ae01444aa81c862eb74f0545b8d05371a" args="(sha2_context *ctx, int is224)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void sha2_starts </td> <td>(</td> <td class="paramtype"><a class="el" href="structsha2__context.html">sha2_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><dt><b>Parameters:</b></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> </div> </div> <a class="anchor" id="a364a95b93b92a5041d529c6e89dde122"></a><!-- doxytag: member="sha2.h::sha2_update" ref="a364a95b93b92a5041d529c6e89dde122" args="(sha2_context *ctx, const unsigned char *input, int ilen)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void sha2_update </td> <td>(</td> <td class="paramtype"><a class="el" href="structsha2__context.html">sha2_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">int </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><dt><b>Parameters:</b></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> </div> </div> </div> <!-- window showing the filter options --> <div id="MSearchSelectWindow" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return 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