📄 xtr_8h-source.html
字号:
<!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++: xtr.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 Page</a> | <a class="qindex" href="namespaces.html">Namespace List</a> | <a class="qindex" href="hierarchy.html">Class Hierarchy</a> | <a class="qindex" href="classes.html">Alphabetical List</a> | <a class="qindex" href="annotated.html">Compound List</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="namespacemembers.html">Namespace Members</a> | <a class="qindex" href="functions.html">Compound Members</a> | <a class="qindex" href="globals.html">File Members</a></div><h1>xtr.h</h1><a href="xtr_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <span class="preprocessor">#ifndef CRYPTOPP_XTR_H</span>00002 <span class="preprocessor"></span><span class="preprocessor">#define CRYPTOPP_XTR_H</span>00003 <span class="preprocessor"></span><span class="comment"></span>00004 <span class="comment">/** \file</span>00005 <span class="comment"> "The XTR public key system" by Arjen K. Lenstra and Eric R. Verheul</span>00006 <span class="comment">*/</span>00007 00008 <span class="preprocessor">#include "modarith.h"</span>00009 00010 NAMESPACE_BEGIN(CryptoPP)00011 00012 <span class="comment">//! an element of GF(p^2)</span><a name="l00013"></a><a class="code" href="class_g_f_p2_element.html">00013</a> <span class="comment"></span><span class="keyword">class </span><a class="code" href="class_g_f_p2_element.html">GFP2Element</a>00014 {00015 <span class="keyword">public</span>:00016 <a class="code" href="class_g_f_p2_element.html">GFP2Element</a>() {}00017 <a class="code" href="class_g_f_p2_element.html">GFP2Element</a>(<span class="keyword">const</span> <a class="code" href="class_integer.html">Integer</a> &c1, <span class="keyword">const</span> <a class="code" href="class_integer.html">Integer</a> &c2) : c1(c1), c2(c2) {}00018 <a class="code" href="class_g_f_p2_element.html">GFP2Element</a>(<span class="keyword">const</span> byte *encodedElement, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> size)00019 : c1(encodedElement, size/2), c2(encodedElement+size/2, size/2) {}00020 00021 <span class="keywordtype">void</span> Encode(byte *encodedElement, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> size)00022 {00023 c1.<a class="code" href="class_integer.html#_integerz39_1">Encode</a>(encodedElement, size/2);00024 c2.<a class="code" href="class_integer.html#_integerz39_1">Encode</a>(encodedElement+size/2, size/2);00025 }00026 00027 <span class="keywordtype">bool</span> operator==(<span class="keyword">const</span> <a class="code" href="class_g_f_p2_element.html">GFP2Element</a> &rhs)<span class="keyword"> const </span>{<span class="keywordflow">return</span> c1 == rhs.<a class="code" href="class_g_f_p2_element.html#_g_f_p2_elemento0">c1</a> && c2 == rhs.<a class="code" href="class_g_f_p2_element.html#_g_f_p2_elemento1">c2</a>;}00028 <span class="keywordtype">bool</span> operator!=(<span class="keyword">const</span> <a class="code" href="class_g_f_p2_element.html">GFP2Element</a> &rhs)<span class="keyword"> const </span>{<span class="keywordflow">return</span> !operator==(rhs);}00029 00030 <span class="keywordtype">void</span> swap(<a class="code" href="class_g_f_p2_element.html">GFP2Element</a> &a)00031 {00032 c1.<a class="code" href="class_integer.html#_integerz43_20">swap</a>(a.c1);00033 c2.<a class="code" href="class_integer.html#_integerz43_20">swap</a>(a.c2);00034 }00035 00036 <span class="keyword">static</span> <a class="code" href="class_g_f_p2_element.html">GFP2Element</a> & Zero();00037 00038 <a class="code" href="class_integer.html">Integer</a> c1, c2;00039 };00040 <span class="comment"></span>00041 <span class="comment">//! GF(p^2), optimal normal basis</span>00042 <span class="comment"></span><span class="keyword">template</span> <<span class="keyword">class</span> F><a name="l00043"></a><a class="code" href="class_g_f_p2___o_n_b.html">00043</a> <span class="keyword">class </span><a class="code" href="class_g_f_p2___o_n_b.html">GFP2_ONB</a> : <span class="keyword">public</span> <a class="code" href="class_abstract_ring.html">AbstractRing</a><GFP2Element>00044 {00045 <span class="keyword">public</span>:00046 <span class="keyword">typedef</span> F BaseField;00047 00048 <a class="code" href="class_g_f_p2___o_n_b.html">GFP2_ONB</a>(<span class="keyword">const</span> <a class="code" href="class_integer.html">Integer</a> &p) : modp(p)00049 {00050 <span class="keywordflow">if</span> (p%3 != 2)00051 <span class="keywordflow">throw</span> <a class="code" href="class_invalid_argument.html">InvalidArgument</a>(<span class="stringliteral">"GFP2_ONB: modulus must be equivalent to 2 mod 3"</span>);00052 }00053 00054 <span class="keyword">const</span> <a class="code" href="class_integer.html">Integer</a>& GetModulus()<span class="keyword"> const </span>{<span class="keywordflow">return</span> modp.GetModulus();}00055 00056 <a class="code" href="class_g_f_p2_element.html">GFP2Element</a> ConvertIn(<span class="keyword">const</span> <a class="code" href="class_integer.html">Integer</a> &a)<span class="keyword"> const</span>00057 <span class="keyword"> </span>{00058 t = modp.Inverse(modp.ConvertIn(a));00059 <span class="keywordflow">return</span> <a class="code" href="class_g_f_p2_element.html">GFP2Element</a>(t, t);00060 }00061 00062 <a class="code" href="class_g_f_p2_element.html">GFP2Element</a> ConvertIn(<span class="keyword">const</span> <a class="code" href="class_g_f_p2_element.html">GFP2Element</a> &a)<span class="keyword"> const</span>00063 <span class="keyword"> </span>{<span class="keywordflow">return</span> <a class="code" href="class_g_f_p2_element.html">GFP2Element</a>(modp.ConvertIn(a.c1), modp.ConvertIn(a.c2));}00064 00065 <a class="code" href="class_g_f_p2_element.html">GFP2Element</a> ConvertOut(<span class="keyword">const</span> <a class="code" href="class_g_f_p2_element.html">GFP2Element</a> &a)<span class="keyword"> const</span>00066 <span class="keyword"> </span>{<span class="keywordflow">return</span> <a class="code" href="class_g_f_p2_element.html">GFP2Element</a>(modp.ConvertOut(a.c1), modp.ConvertOut(a.c2));}00067 00068 <span class="keywordtype">bool</span> Equal(<span class="keyword">const</span> <a class="code" href="class_g_f_p2_element.html">GFP2Element</a> &a, <span class="keyword">const</span> <a class="code" href="class_g_f_p2_element.html">GFP2Element</a> &b)<span class="keyword"> const</span>00069 <span class="keyword"> </span>{00070 <span class="keywordflow">return</span> modp.Equal(a.c1, b.c1) && modp.Equal(a.c2, b.c2);00071 }00072 00073 <span class="keyword">const</span> Element& Identity()<span class="keyword"> const</span>00074 <span class="keyword"> </span>{00075 <span class="keywordflow">return</span> GFP2Element::Zero();00076 }00077 00078 <span class="keyword">const</span> Element& Add(<span class="keyword">const</span> Element &a, <span class="keyword">const</span> Element &b)<span class="keyword"> const</span>00079 <span class="keyword"> </span>{00080 result.<a class="code" href="class_g_f_p2_element.html#_g_f_p2_elemento0">c1</a> = modp.Add(a.c1, b.c1);00081 result.<a class="code" href="class_g_f_p2_element.html#_g_f_p2_elemento1">c2</a> = modp.Add(a.c2, b.c2);00082 <span class="keywordflow">return</span> result;00083 }00084 00085 <span class="keyword">const</span> Element& Inverse(<span class="keyword">const</span> Element &a)<span class="keyword"> const</span>00086 <span class="keyword"> </span>{00087 result.<a class="code" href="class_g_f_p2_element.html#_g_f_p2_elemento0">c1</a> = modp.Inverse(a.c1);00088 result.<a class="code" href="class_g_f_p2_element.html#_g_f_p2_elemento1">c2</a> = modp.Inverse(a.c2);00089 <span class="keywordflow">return</span> result;00090 }00091 00092 <span class="keyword">const</span> Element& Double(<span class="keyword">const</span> Element &a)<span class="keyword"> const</span>00093 <span class="keyword"> </span>{00094 result.<a class="code" href="class_g_f_p2_element.html#_g_f_p2_elemento0">c1</a> = modp.Double(a.c1);00095 result.<a class="code" href="class_g_f_p2_element.html#_g_f_p2_elemento1">c2</a> = modp.Double(a.c2);00096 <span class="keywordflow">return</span> result;00097 }00098 00099 <span class="keyword">const</span> Element& Subtract(<span class="keyword">const</span> Element &a, <span class="keyword">const</span> Element &b)<span class="keyword"> const</span>00100 <span class="keyword"> </span>{00101 result.<a class="code" href="class_g_f_p2_element.html#_g_f_p2_elemento0">c1</a> = modp.Subtract(a.c1, b.c1);00102 result.<a class="code" href="class_g_f_p2_element.html#_g_f_p2_elemento1">c2</a> = modp.Subtract(a.c2, b.c2);00103 <span class="keywordflow">return</span> result;00104 }00105 00106 Element& Accumulate(Element &a, <span class="keyword">const</span> Element &b)<span class="keyword"> const</span>00107 <span class="keyword"> </span>{00108 modp.Accumulate(a.c1, b.c1);⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -