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<h1>gcm_aes.c</h1><a href="gcm__aes_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> ---------------------------------------------------------------------------</span>
<a name="l00003"></a>00003 <span class="comment"> Copyright (c) 1998-2006, Brian Gladman, Worcester, UK. All rights reserved.</span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment"> LICENSE TERMS</span>
<a name="l00006"></a>00006 <span class="comment"></span>
<a name="l00007"></a>00007 <span class="comment"> The free distribution and use of this software in both source and binary</span>
<a name="l00008"></a>00008 <span class="comment"> form is allowed (with or without changes) provided that:</span>
<a name="l00009"></a>00009 <span class="comment"></span>
<a name="l00010"></a>00010 <span class="comment"> 1. distributions of this source code include the above copyright</span>
<a name="l00011"></a>00011 <span class="comment"> notice, this list of conditions and the following disclaimer;</span>
<a name="l00012"></a>00012 <span class="comment"></span>
<a name="l00013"></a>00013 <span class="comment"> 2. distributions in binary form include the above copyright</span>
<a name="l00014"></a>00014 <span class="comment"> notice, this list of conditions and the following disclaimer</span>
<a name="l00015"></a>00015 <span class="comment"> in the documentation and/or other associated materials;</span>
<a name="l00016"></a>00016 <span class="comment"></span>
<a name="l00017"></a>00017 <span class="comment"> 3. the copyright holder's name is not used to endorse products</span>
<a name="l00018"></a>00018 <span class="comment"> built using this software without specific written permission.</span>
<a name="l00019"></a>00019 <span class="comment"></span>
<a name="l00020"></a>00020 <span class="comment"> ALTERNATIVELY, provided that this notice is retained in full, this product</span>
<a name="l00021"></a>00021 <span class="comment"> may be distributed under the terms of the GNU General Public License (GPL),</span>
<a name="l00022"></a>00022 <span class="comment"> in which case the provisions of the GPL apply INSTEAD OF those given above.</span>
<a name="l00023"></a>00023 <span class="comment"></span>
<a name="l00024"></a>00024 <span class="comment"> DISCLAIMER</span>
<a name="l00025"></a>00025 <span class="comment"></span>
<a name="l00026"></a>00026 <span class="comment"> This software is provided 'as is' with no explicit or implied warranties</span>
<a name="l00027"></a>00027 <span class="comment"> in respect of its properties, including, but not limited to, correctness</span>
<a name="l00028"></a>00028 <span class="comment"> and/or fitness for purpose.</span>
<a name="l00029"></a>00029 <span class="comment"> ---------------------------------------------------------------------------</span>
<a name="l00030"></a>00030 <span class="comment"> Issue 16/04/2007</span>
<a name="l00031"></a>00031 <span class="comment">*/</span>
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="comment">/* This file changed 5 June 2007, extracted from "aeskey.c", extracting</span>
<a name="l00034"></a>00034 <span class="comment"> only those portions needed to use gcm-mode in an OpenSSL environment.</span>
<a name="l00035"></a>00035 <span class="comment"> Changed by Peter Lovell, SPARTA Inc., for DTN project.</span>
<a name="l00036"></a>00036 <span class="comment">*/</span>
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="preprocessor">#ifdef HAVE_CONFIG_H</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span><span class="preprocessor"># include <<a class="code" href="dtn-config_8h.html">dtn-config.h</a>></span>
<a name="l00040"></a>00040 <span class="preprocessor">#endif</span>
<a name="l00041"></a>00041 <span class="preprocessor"></span>
<a name="l00042"></a>00042 <span class="preprocessor">#ifdef BSP_ENABLED</span>
<a name="l00043"></a>00043 <span class="preprocessor"></span>
<a name="l00044"></a>00044 <span class="preprocessor">#include "<a class="code" href="gcm__aes_8h.html">gcm_aes.h</a>"</span>
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <span class="preprocessor">#if defined(__cplusplus)</span>
<a name="l00047"></a>00047 <span class="preprocessor"></span><span class="keyword">extern</span> <span class="stringliteral">"C"</span>
<a name="l00048"></a>00048 {
<a name="l00049"></a>00049 <span class="preprocessor">#endif</span>
<a name="l00050"></a>00050 <span class="preprocessor"></span>
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <a class="code" href="gcm__aes_8h.html#c1cc832f910e42305beded90e150b56f">AES_RETURN</a> <a class="code" href="gcm__aes_8h.html#3950edc98e2068c4d3399a40bd3b1155">aes_encrypt_key</a>(<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *key, <span class="keywordtype">int</span> key_len, <a class="code" href="gcm__aes_8h.html#3fe2bc67172e2479a0b178d134b076bc">aes_encrypt_ctx</a>* cx)
<a name="l00053"></a>00053 {
<a name="l00054"></a>00054 <span class="keywordflow">if</span> ( key_len < 128 )
<a name="l00055"></a>00055 key_len *= 8; <span class="comment">/* convert byte-count to bit-count */</span>
<a name="l00056"></a>00056
<a name="l00057"></a>00057 AES_set_encrypt_key(key, key_len, cx);
<a name="l00058"></a>00058 <span class="keywordflow">return</span>;
<a name="l00059"></a>00059 }
<a name="l00060"></a>00060
<a name="l00061"></a>00061
<a name="l00062"></a>00062 <span class="preprocessor">#if defined(__cplusplus)</span>
<a name="l00063"></a>00063 <span class="preprocessor"></span>}
<a name="l00064"></a>00064 <span class="preprocessor">#endif</span>
<a name="l00065"></a>00065 <span class="preprocessor"></span>
<a name="l00066"></a>00066 <span class="preprocessor">#endif </span><span class="comment">/* BSP_ENABLED */</span>
</pre></div></div>
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