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<p>DES block cipher.
<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 des.h:</div>
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<div class="center"><img src="des_8h__incl.png" border="0" usemap="#des_8h" alt=""/></div>
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<p><a href="des_8h_source.html">Go to the source code of this file.</a></p>
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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="structdes__context.html">des_context</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">DES context structure. <a href="structdes__context.html#details">More...</a><br/></td></tr>
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<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structdes3__context.html">des3_context</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">Triple-DES context structure. <a href="structdes3__context.html#details">More...</a><br/></td></tr>
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Macros</h2></td></tr>
<tr class="memitem:a89730e026cc6082480f070985e91e8aa"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#a89730e026cc6082480f070985e91e8aa">DES_ENCRYPT</a>   1</td></tr>
<tr class="separator:a89730e026cc6082480f070985e91e8aa"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a7ca3b464dc9e6cabf82f636101b6e133"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#a7ca3b464dc9e6cabf82f636101b6e133">DES_DECRYPT</a>   0</td></tr>
<tr class="separator:a7ca3b464dc9e6cabf82f636101b6e133"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:abd97773a4916e7ba50ad66dc77719bac"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#abd97773a4916e7ba50ad66dc77719bac">POLARSSL_ERR_DES_INVALID_INPUT_LENGTH</a>   -0x0032</td></tr>
<tr class="memdesc:abd97773a4916e7ba50ad66dc77719bac"><td class="mdescLeft"> </td><td class="mdescRight">The data input has an invalid length. <a href="#abd97773a4916e7ba50ad66dc77719bac">More...</a><br/></td></tr>
<tr class="separator:abd97773a4916e7ba50ad66dc77719bac"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a8bf6267292365ce38e20d505445a361b"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#a8bf6267292365ce38e20d505445a361b">DES_KEY_SIZE</a>   8</td></tr>
<tr class="separator:a8bf6267292365ce38e20d505445a361b"><td class="memSeparator" colspan="2"> </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:a1ed09f7f6da53be335a13839b8036e61"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#a1ed09f7f6da53be335a13839b8036e61">des_init</a> (<a class="el" href="structdes__context.html">des_context</a> *ctx)</td></tr>
<tr class="memdesc:a1ed09f7f6da53be335a13839b8036e61"><td class="mdescLeft"> </td><td class="mdescRight">Initialize DES context. <a href="#a1ed09f7f6da53be335a13839b8036e61">More...</a><br/></td></tr>
<tr class="separator:a1ed09f7f6da53be335a13839b8036e61"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ae8d8b3cc4fc59ef7b59a2392c988fc30"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#ae8d8b3cc4fc59ef7b59a2392c988fc30">des_free</a> (<a class="el" href="structdes__context.html">des_context</a> *ctx)</td></tr>
<tr class="memdesc:ae8d8b3cc4fc59ef7b59a2392c988fc30"><td class="mdescLeft"> </td><td class="mdescRight">Clear DES context. <a href="#ae8d8b3cc4fc59ef7b59a2392c988fc30">More...</a><br/></td></tr>
<tr class="separator:ae8d8b3cc4fc59ef7b59a2392c988fc30"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a4d351cc3a7e07b759d74044d09b44ca3"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#a4d351cc3a7e07b759d74044d09b44ca3">des3_init</a> (<a class="el" href="structdes3__context.html">des3_context</a> *ctx)</td></tr>
<tr class="memdesc:a4d351cc3a7e07b759d74044d09b44ca3"><td class="mdescLeft"> </td><td class="mdescRight">Initialize Triple-DES context. <a href="#a4d351cc3a7e07b759d74044d09b44ca3">More...</a><br/></td></tr>
<tr class="separator:a4d351cc3a7e07b759d74044d09b44ca3"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa2df5205d7bdcd9b3a9a3f721195ceeb"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#aa2df5205d7bdcd9b3a9a3f721195ceeb">des3_free</a> (<a class="el" href="structdes3__context.html">des3_context</a> *ctx)</td></tr>
<tr class="memdesc:aa2df5205d7bdcd9b3a9a3f721195ceeb"><td class="mdescLeft"> </td><td class="mdescRight">Clear Triple-DES context. <a href="#aa2df5205d7bdcd9b3a9a3f721195ceeb">More...</a><br/></td></tr>
<tr class="separator:aa2df5205d7bdcd9b3a9a3f721195ceeb"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aeeb6460f4809428528e32fd5a01f7932"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#aeeb6460f4809428528e32fd5a01f7932">des_key_set_parity</a> (unsigned char key[<a class="el" href="des_8h.html#a8bf6267292365ce38e20d505445a361b">DES_KEY_SIZE</a>])</td></tr>
<tr class="memdesc:aeeb6460f4809428528e32fd5a01f7932"><td class="mdescLeft"> </td><td class="mdescRight">Set key parity on the given key to odd. <a href="#aeeb6460f4809428528e32fd5a01f7932">More...</a><br/></td></tr>
<tr class="separator:aeeb6460f4809428528e32fd5a01f7932"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af089610af0a75467372238e33180adb1"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#af089610af0a75467372238e33180adb1">des_key_check_key_parity</a> (const unsigned char key[<a class="el" href="des_8h.html#a8bf6267292365ce38e20d505445a361b">DES_KEY_SIZE</a>])</td></tr>
<tr class="memdesc:af089610af0a75467372238e33180adb1"><td class="mdescLeft"> </td><td class="mdescRight">Check that key parity on the given key is odd. <a href="#af089610af0a75467372238e33180adb1">More...</a><br/></td></tr>
<tr class="separator:af089610af0a75467372238e33180adb1"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:adb48a3e7b81245c576a91e854e9a6db6"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#adb48a3e7b81245c576a91e854e9a6db6">des_key_check_weak</a> (const unsigned char key[<a class="el" href="des_8h.html#a8bf6267292365ce38e20d505445a361b">DES_KEY_SIZE</a>])</td></tr>
<tr class="memdesc:adb48a3e7b81245c576a91e854e9a6db6"><td class="mdescLeft"> </td><td class="mdescRight">Check that key is not a weak or semi-weak DES key. <a href="#adb48a3e7b81245c576a91e854e9a6db6">More...</a><br/></td></tr>
<tr class="separator:adb48a3e7b81245c576a91e854e9a6db6"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a1b22cb44f55c6d017fa13cf2d0fc7f9b"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#a1b22cb44f55c6d017fa13cf2d0fc7f9b">des_setkey_enc</a> (<a class="el" href="structdes__context.html">des_context</a> *ctx, const unsigned char key[<a class="el" href="des_8h.html#a8bf6267292365ce38e20d505445a361b">DES_KEY_SIZE</a>])</td></tr>
<tr class="memdesc:a1b22cb44f55c6d017fa13cf2d0fc7f9b"><td class="mdescLeft"> </td><td class="mdescRight">DES key schedule (56-bit, encryption) <a href="#a1b22cb44f55c6d017fa13cf2d0fc7f9b">More...</a><br/></td></tr>
<tr class="separator:a1b22cb44f55c6d017fa13cf2d0fc7f9b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab300e183176d3e3b21af9452c75acb85"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#ab300e183176d3e3b21af9452c75acb85">des_setkey_dec</a> (<a class="el" href="structdes__context.html">des_context</a> *ctx, const unsigned char key[<a class="el" href="des_8h.html#a8bf6267292365ce38e20d505445a361b">DES_KEY_SIZE</a>])</td></tr>
<tr class="memdesc:ab300e183176d3e3b21af9452c75acb85"><td class="mdescLeft"> </td><td class="mdescRight">DES key schedule (56-bit, decryption) <a href="#ab300e183176d3e3b21af9452c75acb85">More...</a><br/></td></tr>
<tr class="separator:ab300e183176d3e3b21af9452c75acb85"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a2d2c76bae67d37111bf9f5e6c4eaf4b6"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#a2d2c76bae67d37111bf9f5e6c4eaf4b6">des3_set2key_enc</a> (<a class="el" href="structdes3__context.html">des3_context</a> *ctx, const unsigned char key[<a class="el" href="des_8h.html#a8bf6267292365ce38e20d505445a361b">DES_KEY_SIZE</a> *2])</td></tr>
<tr class="memdesc:a2d2c76bae67d37111bf9f5e6c4eaf4b6"><td class="mdescLeft"> </td><td class="mdescRight">Triple-DES key schedule (112-bit, encryption) <a href="#a2d2c76bae67d37111bf9f5e6c4eaf4b6">More...</a><br/></td></tr>
<tr class="separator:a2d2c76bae67d37111bf9f5e6c4eaf4b6"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aaa06aa58db669053ecc488b47fca5a9d"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#aaa06aa58db669053ecc488b47fca5a9d">des3_set2key_dec</a> (<a class="el" href="structdes3__context.html">des3_context</a> *ctx, const unsigned char key[<a class="el" href="des_8h.html#a8bf6267292365ce38e20d505445a361b">DES_KEY_SIZE</a> *2])</td></tr>
<tr class="memdesc:aaa06aa58db669053ecc488b47fca5a9d"><td class="mdescLeft"> </td><td class="mdescRight">Triple-DES key schedule (112-bit, decryption) <a href="#aaa06aa58db669053ecc488b47fca5a9d">More...</a><br/></td></tr>
<tr class="separator:aaa06aa58db669053ecc488b47fca5a9d"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a9e2e59abedd7f5ce8f35cdd210367a61"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#a9e2e59abedd7f5ce8f35cdd210367a61">des3_set3key_enc</a> (<a class="el" href="structdes3__context.html">des3_context</a> *ctx, const unsigned char key[<a class="el" href="des_8h.html#a8bf6267292365ce38e20d505445a361b">DES_KEY_SIZE</a> *3])</td></tr>
<tr class="memdesc:a9e2e59abedd7f5ce8f35cdd210367a61"><td class="mdescLeft"> </td><td class="mdescRight">Triple-DES key schedule (168-bit, encryption) <a href="#a9e2e59abedd7f5ce8f35cdd210367a61">More...</a><br/></td></tr>
<tr class="separator:a9e2e59abedd7f5ce8f35cdd210367a61"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a563cfb88d2dbd782e9ddeae473747877"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#a563cfb88d2dbd782e9ddeae473747877">des3_set3key_dec</a> (<a class="el" href="structdes3__context.html">des3_context</a> *ctx, const unsigned char key[<a class="el" href="des_8h.html#a8bf6267292365ce38e20d505445a361b">DES_KEY_SIZE</a> *3])</td></tr>
<tr class="memdesc:a563cfb88d2dbd782e9ddeae473747877"><td class="mdescLeft"> </td><td class="mdescRight">Triple-DES key schedule (168-bit, decryption) <a href="#a563cfb88d2dbd782e9ddeae473747877">More...</a><br/></td></tr>
<tr class="separator:a563cfb88d2dbd782e9ddeae473747877"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a92ee6c66c1fd47cd3eba61736d0478b1"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#a92ee6c66c1fd47cd3eba61736d0478b1">des_crypt_ecb</a> (<a class="el" href="structdes__context.html">des_context</a> *ctx, const unsigned char input[8], unsigned char output[8])</td></tr>
<tr class="memdesc:a92ee6c66c1fd47cd3eba61736d0478b1"><td class="mdescLeft"> </td><td class="mdescRight">DES-ECB block encryption/decryption. <a href="#a92ee6c66c1fd47cd3eba61736d0478b1">More...</a><br/></td></tr>
<tr class="separator:a92ee6c66c1fd47cd3eba61736d0478b1"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a71a6423b0f22c8f619466c376176cebc"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#a71a6423b0f22c8f619466c376176cebc">des_crypt_cbc</a> (<a class="el" href="structdes__context.html">des_context</a> *ctx, int mode, size_t length, unsigned char iv[8], const unsigned char *input, unsigned char *output)</td></tr>
<tr class="memdesc:a71a6423b0f22c8f619466c376176cebc"><td class="mdescLeft"> </td><td class="mdescRight">DES-CBC buffer encryption/decryption. <a href="#a71a6423b0f22c8f619466c376176cebc">More...</a><br/></td></tr>
<tr class="separator:a71a6423b0f22c8f619466c376176cebc"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac404a5ef3c0602cdc31c9e0e74530b0a"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#ac404a5ef3c0602cdc31c9e0e74530b0a">des3_crypt_ecb</a> (<a class="el" href="structdes3__context.html">des3_context</a> *ctx, const unsigned char input[8], unsigned char output[8])</td></tr>
<tr class="memdesc:ac404a5ef3c0602cdc31c9e0e74530b0a"><td class="mdescLeft"> </td><td class="mdescRight">3DES-ECB block encryption/decryption <a href="#ac404a5ef3c0602cdc31c9e0e74530b0a">More...</a><br/></td></tr>
<tr class="separator:ac404a5ef3c0602cdc31c9e0e74530b0a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab632094bc0183a19d1108bcac3ec2ab2"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#ab632094bc0183a19d1108bcac3ec2ab2">des3_crypt_cbc</a> (<a class="el" href="structdes3__context.html">des3_context</a> *ctx, int mode, size_t length, unsigned char iv[8], const unsigned char *input, unsigned char *output)</td></tr>
<tr class="memdesc:ab632094bc0183a19d1108bcac3ec2ab2"><td class="mdescLeft"> </td><td class="mdescRight">3DES-CBC buffer encryption/decryption <a href="#ab632094bc0183a19d1108bcac3ec2ab2">More...</a><br/></td></tr>
<tr class="separator:ab632094bc0183a19d1108bcac3ec2ab2"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a2bd2b961a40ca87150e2b9f4f9dc1fb1"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="des_8h.html#a2bd2b961a40ca87150e2b9f4f9dc1fb1">des_self_test</a> (int verbose)</td></tr>
<tr class="memdesc:a2bd2b961a40ca87150e2b9f4f9dc1fb1"><td class="mdescLeft"> </td><td class="mdescRight">Checkup routine. <a href="#a2bd2b961a40ca87150e2b9f4f9dc1fb1">More...</a><br/></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>DES block cipher. </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="des_8h_source.html">des.h</a>.</p>
</div><h2 class="groupheader">Macro Definition Documentation</h2>
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<td class="memname">#define DES_DECRYPT   0</td>
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<p>Definition at line <a class="el" href="des_8h_source.html#l00046">46</a> of file <a class="el" href="des_8h_source.html">des.h</a>.</p>
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<td class="memname">#define DES_ENCRYPT   1</td>
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<p>Definition at line <a class="el" href="des_8h_source.html#l00045">45</a> of file <a class="el" href="des_8h_source.html">des.h</a>.</p>
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<td class="memname">#define DES_KEY_SIZE   8</td>
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<p>Definition at line <a class="el" href="des_8h_source.html#l00050">50</a> of file <a class="el" href="des_8h_source.html">des.h</a>.</p>
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<td class="memname">#define POLARSSL_ERR_DES_INVALID_INPUT_LENGTH   -0x0032</td>
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<p>The data input has an invalid length. </p>
<p>Definition at line <a class="el" href="des_8h_source.html#l00048">48</a> of file <a class="el" href="des_8h_source.html">des.h</a>.</p>
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<h2 class="groupheader">Function Documentation</h2>
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<td class="memname">int des3_crypt_cbc </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structdes3__context.html">des3_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>mode</em>, </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>length</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned char </td>
<td class="paramname"><em>iv</em>[8], </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const unsigned char * </td>
<td class="paramname"><em>input</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned char * </td>
<td class="paramname"><em>output</em> </td>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p>3DES-CBC buffer encryption/decryption </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>3DES context </td></tr>
<tr><td class="paramname">mode</td><td>DES_ENCRYPT or DES_DECRYPT </td></tr>
<tr><td class="paramname">length</td><td>length of the input data </td></tr>
<tr><td class="paramname">iv</td><td>initialization vector (updated after use) </td></tr>
<tr><td class="paramname">input</td><td>buffer holding the input data </td></tr>
<tr><td class="paramname">output</td><td>buffer holding the output data</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 if successful, or POLARSSL_ERR_DES_INVALID_INPUT_LENGTH </dd></dl>
</div>
</div>
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<td class="memname">int des3_crypt_ecb </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structdes3__context.html">des3_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>[8], </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned char </td>
<td class="paramname"><em>output</em>[8] </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>3DES-ECB block encryption/decryption </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>3DES context </td></tr>
<tr><td class="paramname">input</td><td>64-bit input block </td></tr>
<tr><td class="paramname">output</td><td>64-bit output block</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 if successful </dd></dl>
</div>
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<td class="memname">void des3_free </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structdes3__context.html">des3_context</a> * </td>
<td class="paramname"><em>ctx</em></td><td>)</td>
<td></td>
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<p>Clear Triple-DES context. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>DES3 context to be cleared </td></tr>
</table>
</dd>
</dl>
</div>
</div>
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<td class="memname">void des3_init </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structdes3__context.html">des3_context</a> * </td>
<td class="paramname"><em>ctx</em></td><td>)</td>
<td></td>
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<p>Initialize Triple-DES context. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>DES3 context to be initialized </td></tr>
</table>
</dd>
</dl>
</div>
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<td class="memname">int des3_set2key_dec </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structdes3__context.html">des3_context</a> * </td>
<td class="paramname"><em>ctx</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const unsigned char </td>
<td class="paramname"><em>key</em>[DES_KEY_SIZE *2] </td>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p>Triple-DES key schedule (112-bit, decryption) </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>3DES context to be initialized </td></tr>
<tr><td class="paramname">key</td><td>16-byte secret key</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 </dd></dl>
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<td class="memname">int des3_set2key_enc </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structdes3__context.html">des3_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>[DES_KEY_SIZE *2] </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p>Triple-DES key schedule (112-bit, encryption) </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>3DES context to be initialized </td></tr>
<tr><td class="paramname">key</td><td>16-byte secret key</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 </dd></dl>
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<td class="memname">int des3_set3key_dec </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structdes3__context.html">des3_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>[DES_KEY_SIZE *3] </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>Triple-DES key schedule (168-bit, decryption) </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>3DES context to be initialized </td></tr>
<tr><td class="paramname">key</td><td>24-byte secret key</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 </dd></dl>
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<td class="memname">int des3_set3key_enc </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structdes3__context.html">des3_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>[DES_KEY_SIZE *3] </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>Triple-DES key schedule (168-bit, encryption) </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>3DES context to be initialized </td></tr>
<tr><td class="paramname">key</td><td>24-byte secret key</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 </dd></dl>
</div>
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<td class="memname">int des_crypt_cbc </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structdes__context.html">des_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>mode</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>length</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned char </td>
<td class="paramname"><em>iv</em>[8], </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">unsigned char * </td>
<td class="paramname"><em>output</em> </td>
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<td></td>
<td>)</td>
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<p>DES-CBC buffer encryption/decryption. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>DES context </td></tr>
<tr><td class="paramname">mode</td><td>DES_ENCRYPT or DES_DECRYPT </td></tr>
<tr><td class="paramname">length</td><td>length of the input data </td></tr>
<tr><td class="paramname">iv</td><td>initialization vector (updated after use) </td></tr>
<tr><td class="paramname">input</td><td>buffer holding the input data </td></tr>
<tr><td class="paramname">output</td><td>buffer holding the output data </td></tr>
</table>
</dd>
</dl>
</div>
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<td class="memname">int des_crypt_ecb </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structdes__context.html">des_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>[8], </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned char </td>
<td class="paramname"><em>output</em>[8] </td>
</tr>
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<td></td>
<td>)</td>
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<p>DES-ECB block encryption/decryption. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>DES context </td></tr>
<tr><td class="paramname">input</td><td>64-bit input block </td></tr>
<tr><td class="paramname">output</td><td>64-bit output block</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 if successful </dd></dl>
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<td class="memname">void des_free </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structdes__context.html">des_context</a> * </td>
<td class="paramname"><em>ctx</em></td><td>)</td>
<td></td>
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<p>Clear DES context. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>DES context to be cleared </td></tr>
</table>
</dd>
</dl>
</div>
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<td class="memname">void des_init </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structdes__context.html">des_context</a> * </td>
<td class="paramname"><em>ctx</em></td><td>)</td>
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<p>Initialize DES context. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>DES context to be initialized </td></tr>
</table>
</dd>
</dl>
</div>
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<td class="memname">int des_key_check_key_parity </td>
<td>(</td>
<td class="paramtype">const unsigned char </td>
<td class="paramname"><em>key</em>[DES_KEY_SIZE]</td><td>)</td>
<td></td>
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<p>Check that key parity on the given key is odd. </p>
<pre class="fragment"> DES keys are 56 bits long, but each byte is padded with
a parity bit to allow verification.
</pre><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">key</td><td>8-byte secret key</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 is parity was ok, 1 if parity was not correct. </dd></dl>
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<td class="memname">int des_key_check_weak </td>
<td>(</td>
<td class="paramtype">const unsigned char </td>
<td class="paramname"><em>key</em>[DES_KEY_SIZE]</td><td>)</td>
<td></td>
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<p>Check that key is not a weak or semi-weak DES key. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">key</td><td>8-byte secret key</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 if no weak key was found, 1 if a weak key was identified. </dd></dl>
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<td class="memname">void des_key_set_parity </td>
<td>(</td>
<td class="paramtype">unsigned char </td>
<td class="paramname"><em>key</em>[DES_KEY_SIZE]</td><td>)</td>
<td></td>
</tr>
</table>
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<p>Set key parity on the given key to odd. </p>
<pre class="fragment"> DES keys are 56 bits long, but each byte is padded with
a parity bit to allow verification.
</pre><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">key</td><td>8-byte secret key </td></tr>
</table>
</dd>
</dl>
</div>
</div>
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<td class="memname">int des_self_test </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>verbose</em></td><td>)</td>
<td></td>
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</table>
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<p>Checkup routine. </p>
<dl class="section return"><dt>Returns</dt><dd>0 if successful, or 1 if the test failed </dd></dl>
</div>
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<td class="memname">int des_setkey_dec </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structdes__context.html">des_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>[DES_KEY_SIZE] </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
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<p>DES key schedule (56-bit, decryption) </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>DES context to be initialized </td></tr>
<tr><td class="paramname">key</td><td>8-byte secret key</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 </dd></dl>
</div>
</div>
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<td class="memname">int des_setkey_enc </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structdes__context.html">des_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>[DES_KEY_SIZE] </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
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<p>DES key schedule (56-bit, encryption) </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>DES context to be initialized </td></tr>
<tr><td class="paramname">key</td><td>8-byte secret key</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 </dd></dl>
</div>
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