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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><title>Crypto++: cbcmac.cpp Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.5.2 --><div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="namespaces.html"><span>Namespaces</span></a></li> <li><a href="classes.html"><span>Classes</span></a></li> <li class="current"><a href="files.html"><span>Files</span></a></li> </ul></div><div class="tabs"> <ul> <li><a href="files.html"><span>File List</span></a></li> <li><a href="globals.html"><span>File Members</span></a></li> </ul></div><h1>cbcmac.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#include "pch.h"</span><a name="l00002"></a>00002 <a name="l00003"></a>00003 <span class="preprocessor">#ifndef CRYPTOPP_IMPORTS</span><a name="l00004"></a>00004 <span class="preprocessor"></span><a name="l00005"></a>00005 <span class="preprocessor">#include "cbcmac.h"</span><a name="l00006"></a>00006 <a name="l00007"></a>00007 NAMESPACE_BEGIN(CryptoPP)<a name="l00008"></a>00008 <a name="l00009"></a><a class="code" href="class_c_b_c___m_a_c___base.html#e20a7dda2bc350e34de851dee4ff81ea">00009</a> void <a class="code" href="class_c_b_c___m_a_c___base.html" title="_">CBC_MAC_Base</a>::UncheckedSetKey(const byte *key, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length, const <a class="code" href="class_name_value_pairs.html" title="interface for retrieving values given their names">NameValuePairs</a> &params)<a name="l00010"></a>00010 {<a name="l00011"></a>00011 AccessCipher().SetKey(key, length, params);<a name="l00012"></a>00012 m_reg.CleanNew(AccessCipher().BlockSize());<a name="l00013"></a>00013 m_counter = 0;<a name="l00014"></a>00014 }<a name="l00015"></a>00015 <a name="l00016"></a><a class="code" href="class_c_b_c___m_a_c___base.html#f4b9ad28defd9ff98d86f0d6de2f4cf0">00016</a> <span class="keywordtype">void</span> <a class="code" href="class_c_b_c___m_a_c___base.html#f4b9ad28defd9ff98d86f0d6de2f4cf0" title="process more input">CBC_MAC_Base::Update</a>(<span class="keyword">const</span> byte *input, <span class="keywordtype">size_t</span> length)<a name="l00017"></a>00017 {<a name="l00018"></a>00018 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> blockSize = AccessCipher().<a class="code" href="class_block_transformation.html#4936bef4368804cf5cadab9eb6eb37e4" title="block size of the cipher in bytes">BlockSize</a>();<a name="l00019"></a>00019 <a name="l00020"></a>00020 <span class="keywordflow">while</span> (m_counter && length)<a name="l00021"></a>00021 {<a name="l00022"></a>00022 m_reg[m_counter++] ^= *input++;<a name="l00023"></a>00023 <span class="keywordflow">if</span> (m_counter == blockSize)<a name="l00024"></a>00024 ProcessBuf();<a name="l00025"></a>00025 length--;<a name="l00026"></a>00026 }<a name="l00027"></a>00027 <a name="l00028"></a>00028 <span class="keywordflow">while</span> (length >= blockSize)<a name="l00029"></a>00029 {<a name="l00030"></a>00030 xorbuf(m_reg, input, blockSize);<a name="l00031"></a>00031 ProcessBuf();<a name="l00032"></a>00032 input += blockSize;<a name="l00033"></a>00033 length -= blockSize;<a name="l00034"></a>00034 }<a name="l00035"></a>00035 <a name="l00036"></a>00036 <span class="keywordflow">while</span> (length--)<a name="l00037"></a>00037 {<a name="l00038"></a>00038 m_reg[m_counter++] ^= *input++;<a name="l00039"></a>00039 <span class="keywordflow">if</span> (m_counter == blockSize)<a name="l00040"></a>00040 ProcessBuf();<a name="l00041"></a>00041 }<a name="l00042"></a>00042 }<a name="l00043"></a>00043 <a name="l00044"></a><a class="code" href="class_c_b_c___m_a_c___base.html#50c5a8fc6a2926485295bbe72bcfe4d8">00044</a> <span class="keywordtype">void</span> <a class="code" href="class_c_b_c___m_a_c___base.html#50c5a8fc6a2926485295bbe72bcfe4d8" title="truncated version of Final()">CBC_MAC_Base::TruncatedFinal</a>(byte *mac, <span class="keywordtype">size_t</span> size)<a name="l00045"></a>00045 {<a name="l00046"></a>00046 <a class="code" href="class_hash_transformation.html#64ba03d31c489dc32b50e00d377d8032">ThrowIfInvalidTruncatedSize</a>(size);<a name="l00047"></a>00047 <a name="l00048"></a>00048 <span class="keywordflow">if</span> (m_counter)<a name="l00049"></a>00049 ProcessBuf();<a name="l00050"></a>00050 <a name="l00051"></a>00051 memcpy(mac, m_reg, size);<a name="l00052"></a>00052 memset(m_reg, 0, AccessCipher().<a class="code" href="class_hash_transformation.html#09c66b86bbe3c13ea9e8d74775696d42" title="block size of underlying compression function, or 0 if not block based">BlockSize</a>());<a name="l00053"></a>00053 }<a name="l00054"></a>00054 <a name="l00055"></a>00055 <span class="keywordtype">void</span> CBC_MAC_Base::ProcessBuf()<a name="l00056"></a>00056 {<a name="l00057"></a>00057 AccessCipher().<a class="code" href="class_block_transformation.html#2fefb3f4c6c6297c0c91fcbba9e4f4f3" title="encrypt or decrypt one block">ProcessBlock</a>(m_reg);<a name="l00058"></a>00058 m_counter = 0;<a name="l00059"></a>00059 }<a name="l00060"></a>00060 <a name="l00061"></a>00061 NAMESPACE_END<a name="l00062"></a>00062 <a name="l00063"></a>00063 <span class="preprocessor">#endif</span></pre></div><hr size="1"><address style="text-align: right;"><small>Generated on Fri Jun 1 11:11:20 2007 for Crypto++ by <a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.2 </small></address></body></html>⌨️ 快捷键说明
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