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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>Crypto++: gf256.h Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.3.2 --><div class="qindex"><a class="qindex" href="index.html">Main&nbsp;Page</a> | <a class="qindex" href="namespaces.html">Namespace List</a> | <a class="qindex" href="hierarchy.html">Class&nbsp;Hierarchy</a> | <a class="qindex" href="classes.html">Alphabetical&nbsp;List</a> | <a class="qindex" href="annotated.html">Compound&nbsp;List</a> | <a class="qindex" href="files.html">File&nbsp;List</a> | <a class="qindex" href="namespacemembers.html">Namespace&nbsp;Members</a> | <a class="qindex" href="functions.html">Compound&nbsp;Members</a> | <a class="qindex" href="globals.html">File&nbsp;Members</a></div><h1>gf256.h</h1><div class="fragment"><pre>00001 <span class="preprocessor">#ifndef CRYPTOPP_GF256_H</span>00002 <span class="preprocessor"></span><span class="preprocessor">#define CRYPTOPP_GF256_H</span>00003 <span class="preprocessor"></span>00004 <span class="preprocessor">#include "<a class="code" href="cryptlib_8h.html">cryptlib.h</a>"</span>00005 00006 NAMESPACE_BEGIN(CryptoPP)00007 00008 <span class="comment">//! GF(256) with polynomial basis</span><a name="l00009"></a><a class="code" href="class_g_f256.html">00009</a> <span class="comment"></span><span class="keyword">class </span><a class="code" href="class_g_f256.html">GF256</a>00010 {00011 <span class="keyword">public</span>:00012         <span class="keyword">typedef</span> byte Element;00013         <span class="keyword">typedef</span> <span class="keywordtype">int</span> RandomizationParameter;00014 00015         <a class="code" href="class_g_f256.html">GF256</a>(byte modulus) : m_modulus(modulus) {}00016 00017         Element RandomElement(<a class="code" href="class_random_number_generator.html">RandomNumberGenerator</a> &amp;rng, <span class="keywordtype">int</span> ignored = 0)<span class="keyword"> const</span>00018 <span class="keyword">                </span>{<span class="keywordflow">return</span> rng.<a class="code" href="class_random_number_generator.html#_sapphire_r_n_ga2">GenerateByte</a>();}00019 00020         <span class="keywordtype">bool</span> Equal(Element a, Element b)<span class="keyword"> const</span>00021 <span class="keyword">                </span>{<span class="keywordflow">return</span> a==b;}00022 00023         Element Zero()<span class="keyword"> const</span>00024 <span class="keyword">                </span>{<span class="keywordflow">return</span> 0;}00025 00026         Element Add(Element a, Element b)<span class="keyword"> const</span>00027 <span class="keyword">                </span>{<span class="keywordflow">return</span> a^b;}00028 00029         Element&amp; Accumulate(Element &amp;a, Element b)<span class="keyword"> const</span>00030 <span class="keyword">                </span>{<span class="keywordflow">return</span> a^=b;}00031 00032         Element Inverse(Element a)<span class="keyword"> const</span>00033 <span class="keyword">                </span>{<span class="keywordflow">return</span> a;}00034 00035         Element Subtract(Element a, Element b)<span class="keyword"> const</span>00036 <span class="keyword">                </span>{<span class="keywordflow">return</span> a^b;}00037 00038         Element&amp; Reduce(Element &amp;a, Element b)<span class="keyword"> const</span>00039 <span class="keyword">                </span>{<span class="keywordflow">return</span> a^=b;}00040 00041         Element Double(Element a)<span class="keyword"> const</span>00042 <span class="keyword">                </span>{<span class="keywordflow">return</span> 0;}00043 00044         Element One()<span class="keyword"> const</span>00045 <span class="keyword">                </span>{<span class="keywordflow">return</span> 1;}00046 00047         Element Multiply(Element a, Element b) <span class="keyword">const</span>;00048 00049         Element <a class="code" href="class_square.html">Square</a>(Element a)<span class="keyword"> const</span>00050 <span class="keyword">                </span>{<span class="keywordflow">return</span> Multiply(a, a);}00051 00052         <span class="keywordtype">bool</span> IsUnit(Element a)<span class="keyword"> const</span>00053 <span class="keyword">                </span>{<span class="keywordflow">return</span> a != 0;}00054 00055         Element MultiplicativeInverse(Element a) <span class="keyword">const</span>;00056 00057         Element Divide(Element a, Element b)<span class="keyword"> const</span>00058 <span class="keyword">                </span>{<span class="keywordflow">return</span> Multiply(a, MultiplicativeInverse(b));}00059 00060 <span class="keyword">private</span>:00061         word m_modulus;00062 };00063 00064 NAMESPACE_END00065 00066 <span class="preprocessor">#endif</span></pre></div><hr size="1"><address style="align: right;"><small>Generated on Tue Jul 8 23:34:15 2003 for Crypto++ by<a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border=0 > </a>1.3.2 </small></address></body></html>
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