Sophie

Sophie

distrib > Fedora > 13 > i386 > media > os > by-pkgid > 07dfcfe50d66c9a48a3c5e6c1693f12a > files > 42

cryptopp-doc-5.6.1-0.1.svn479.fc13.i686.rpm

<!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>Crypto++: cbcmac.cpp Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="doxygen.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<!-- Generated by Doxygen 1.6.1 -->
<div class="navigation" id="top">
  <div class="tabs">
    <ul>
      <li><a href="index.html"><span>Main&nbsp;Page</span></a></li>
      <li><a href="namespaces.html"><span>Namespaces</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>
    </ul>
  </div>
  <div class="tabs">
    <ul>
      <li><a href="files.html"><span>File&nbsp;List</span></a></li>
      <li><a href="globals.html"><span>File&nbsp;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 &quot;pch.h&quot;</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 &quot;cbcmac.h&quot;</span>
<a name="l00006"></a>00006 
<a name="l00007"></a>00007 NAMESPACE_BEGIN(CryptoPP)
<a name="l00008"></a>00008 
<a name="l00009"></a>00009 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> &amp;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#af4b9ad28defd9ff98d86f0d6de2f4cf0">00016</a> <span class="keywordtype">void</span> <a class="code" href="class_c_b_c___m_a_c___base.html#af4b9ad28defd9ff98d86f0d6de2f4cf0" 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#adfdb78b033996020435c3dcffdca76ce" 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 &amp;&amp; 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">if</span> (length &gt;= blockSize)
<a name="l00029"></a>00029         {
<a name="l00030"></a>00030                 <span class="keywordtype">size_t</span> leftOver = AccessCipher().<a class="code" href="class_block_transformation.html#adcff119bb709c84bfaaab8d1871b018c" title="encrypt and xor blocks according to flags (see FlagsForAdvancedProcessBlocks)">AdvancedProcessBlocks</a>(m_reg, input, m_reg, length, BlockTransformation::BT_DontIncrementInOutPointers|BlockTransformation::BT_XorInput);
<a name="l00031"></a>00031                 input += (length - leftOver);
<a name="l00032"></a>00032                 length = leftOver;
<a name="l00033"></a>00033         }
<a name="l00034"></a>00034 
<a name="l00035"></a>00035         <span class="keywordflow">while</span> (length--)
<a name="l00036"></a>00036         {
<a name="l00037"></a>00037                 m_reg[m_counter++] ^= *input++;
<a name="l00038"></a>00038                 <span class="keywordflow">if</span> (m_counter == blockSize)
<a name="l00039"></a>00039                         ProcessBuf();
<a name="l00040"></a>00040         }
<a name="l00041"></a>00041 }
<a name="l00042"></a>00042 
<a name="l00043"></a><a class="code" href="class_c_b_c___m_a_c___base.html#a50c5a8fc6a2926485295bbe72bcfe4d8">00043</a> <span class="keywordtype">void</span> <a class="code" href="class_c_b_c___m_a_c___base.html#a50c5a8fc6a2926485295bbe72bcfe4d8" title="truncated version of Final()">CBC_MAC_Base::TruncatedFinal</a>(byte *mac, <span class="keywordtype">size_t</span> size)
<a name="l00044"></a>00044 {
<a name="l00045"></a>00045         ThrowIfInvalidTruncatedSize(size);
<a name="l00046"></a>00046 
<a name="l00047"></a>00047         <span class="keywordflow">if</span> (m_counter)
<a name="l00048"></a>00048                 ProcessBuf();
<a name="l00049"></a>00049 
<a name="l00050"></a>00050         memcpy(mac, m_reg, size);
<a name="l00051"></a>00051         memset(m_reg, 0, AccessCipher().<a class="code" href="class_hash_transformation.html#ab5507c62376f6bea41d53ae9544d0ff0" title="block size of underlying compression function, or 0 if not block based">BlockSize</a>());
<a name="l00052"></a>00052 }
<a name="l00053"></a>00053 
<a name="l00054"></a>00054 <span class="keywordtype">void</span> CBC_MAC_Base::ProcessBuf()
<a name="l00055"></a>00055 {
<a name="l00056"></a>00056         AccessCipher().<a class="code" href="class_block_transformation.html#a2fefb3f4c6c6297c0c91fcbba9e4f4f3" title="encrypt or decrypt one block">ProcessBlock</a>(m_reg);
<a name="l00057"></a>00057         m_counter = 0;
<a name="l00058"></a>00058 }
<a name="l00059"></a>00059 
<a name="l00060"></a>00060 NAMESPACE_END
<a name="l00061"></a>00061 
<a name="l00062"></a>00062 <span class="preprocessor">#endif</span>
</pre></div></div>
<hr size="1"/><address style="text-align: right;"><small>Generated on 9 Dec 2009 for Crypto++ by&nbsp;
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.1 </small></address>
</body>
</html>

Perl :: Catalyst :: PostgreSQL :: RPM Valid HTML 4.01 Transitional