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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++: eccrypto.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>eccrypto.h</h1><a href="eccrypto_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <span class="preprocessor">#ifndef CRYPTOPP_ECCRYPTO_H</span>00002 <span class="preprocessor"></span><span class="preprocessor">#define CRYPTOPP_ECCRYPTO_H</span>00003 <span class="preprocessor"></span><span class="comment"></span>00004 <span class="comment">/*! \file</span>00005 <span class="comment">*/</span>00006 00007 <span class="preprocessor">#include "<a class="code" href="pubkey_8h.html">pubkey.h</a>"</span>00008 <span class="preprocessor">#include "<a class="code" href="integer_8h.html">integer.h</a>"</span>00009 <span class="preprocessor">#include "asn.h"</span>00010 <span class="preprocessor">#include "hmac.h"</span>00011 <span class="preprocessor">#include "sha.h"</span>00012 <span class="preprocessor">#include "<a class="code" href="gfpcrypt_8h.html">gfpcrypt.h</a>"</span>00013 <span class="preprocessor">#include "<a class="code" href="dh_8h.html">dh.h</a>"</span>00014 <span class="preprocessor">#include "<a class="code" href="mqv_8h.html">mqv.h</a>"</span>00015 <span class="preprocessor">#include "ecp.h"</span>00016 <span class="preprocessor">#include "ec2n.h"</span>00017 00018 NAMESPACE_BEGIN(CryptoPP)00019 00020 <span class="comment">//! Elliptic Curve Parameters</span>00021 <span class="comment"></span><span class="comment">/*! This class corresponds to the ASN.1 sequence of the same name</span>00022 <span class="comment"> in ANSI X9.62 (also SEC 1).</span>00023 <span class="comment">*/</span>00024 <span class="keyword">template</span> <<span class="keyword">class</span> EC><a name="l00025"></a><a class="code" href="class_d_l___group_parameters___e_c.html">00025</a> <span class="keyword">class </span><a class="code" href="class_d_l___group_parameters___e_c.html">DL_GroupParameters_EC</a> : <span class="keyword">public</span> <a class="code" href="class_d_l___group_parameters_impl.html">DL_GroupParametersImpl</a><EcPrecomputation<EC> >00026 {00027 <span class="keyword">typedef</span> <a class="code" href="class_d_l___group_parameters___e_c.html">DL_GroupParameters_EC<EC></a> <a class="code" href="class_d_l___group_parameters___e_c.html">ThisClass</a>;00028 00029 <span class="keyword">public</span>:00030 <span class="keyword">typedef</span> EC EllipticCurve;00031 <span class="keyword">typedef</span> <span class="keyword">typename</span> EllipticCurve::Point Point;00032 <span class="keyword">typedef</span> Point Element;00033 <span class="keyword">typedef</span> IncompatibleCofactorMultiplication DefaultCofactorOption;00034 00035 <a class="code" href="class_d_l___group_parameters___e_c.html">DL_GroupParameters_EC</a>() : m_compress(<span class="keyword">false</span>), m_encodeAsOID(<span class="keyword">false</span>) {}00036 <a class="code" href="class_d_l___group_parameters___e_c.html">DL_GroupParameters_EC</a>(<span class="keyword">const</span> <a class="code" href="class_o_i_d.html">OID</a> &oid)00037 : m_compress(<span class="keyword">false</span>), m_encodeAsOID(<span class="keyword">false</span>) {Initialize(oid);}00038 <a class="code" href="class_d_l___group_parameters___e_c.html">DL_GroupParameters_EC</a>(<span class="keyword">const</span> EllipticCurve &ec, <span class="keyword">const</span> Point &G, <span class="keyword">const</span> <a class="code" href="class_integer.html">Integer</a> &n, <span class="keyword">const</span> <a class="code" href="class_integer.html">Integer</a> &k = <a class="code" href="class_integer.html#_integerz37_10">Integer::Zero</a>())00039 : m_compress(<span class="keyword">false</span>), m_encodeAsOID(<span class="keyword">false</span>) {Initialize(ec, G, n, k);}00040 <a class="code" href="class_d_l___group_parameters___e_c.html">DL_GroupParameters_EC</a>(<a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> &bt)00041 : m_compress(<span class="keyword">false</span>), m_encodeAsOID(<span class="keyword">false</span>) {BERDecode(bt);}00042 00043 <span class="keywordtype">void</span> Initialize(<span class="keyword">const</span> EllipticCurve &ec, <span class="keyword">const</span> Point &G, <span class="keyword">const</span> <a class="code" href="class_integer.html">Integer</a> &n, <span class="keyword">const</span> <a class="code" href="class_integer.html">Integer</a> &k = <a class="code" href="class_integer.html#_integerz37_10">Integer::Zero</a>())00044 {00045 m_groupPrecomputation.SetCurve(ec);00046 SetSubgroupGenerator(G);00047 m_n = n;00048 m_k = k;00049 }00050 <span class="keywordtype">void</span> Initialize(<span class="keyword">const</span> <a class="code" href="class_o_i_d.html">OID</a> &oid);00051 00052 <span class="comment">// NameValuePairs</span>00053 <span class="keywordtype">bool</span> <a class="code" href="class_d_l___group_parameters___e_c.html#_d_l___group_parameters___e_ca6">GetVoidValue</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *name, <span class="keyword">const</span> std::type_info &valueType, <span class="keywordtype">void</span> *pValue) <span class="keyword">const</span>;00054 <span class="keywordtype">void</span> <a class="code" href="class_d_l___group_parameters___e_c.html#_d_l___group_parameters___e_ca7">AssignFrom</a>(<span class="keyword">const</span> <a class="code" href="class_name_value_pairs.html">NameValuePairs</a> &source);00055 00056 <span class="comment">// GeneratibleCryptoMaterial interface</span><span class="comment"></span>00057 <span class="comment"> //! this implementation doesn't actually generate a curve, it just initializes the parameters with existing values</span>00058 <span class="comment"></span><span class="comment"> /*! parameters: (Curve, SubgroupGenerator, SubgroupOrder, Cofactor (optional)), or (GroupOID) */</span>00059 <span class="keywordtype">void</span> <a class="code" href="class_d_l___group_parameters___e_c.html#_d_l___group_parameters___e_ca8">GenerateRandom</a>(<a class="code" href="class_random_number_generator.html">RandomNumberGenerator</a> &rng, <span class="keyword">const</span> <a class="code" href="class_name_value_pairs.html">NameValuePairs</a> &alg);00060 00061 <span class="comment">// DL_GroupParameters</span>00062 <span class="keyword">const</span> DL_FixedBasePrecomputation<Element> & GetBasePrecomputation()<span class="keyword"> const </span>{<span class="keywordflow">return</span> m_gpc;}00063 DL_FixedBasePrecomputation<Element> & AccessBasePrecomputation() {<span class="keywordflow">return</span> m_gpc;}00064 <span class="keyword">const</span> <a class="code" href="class_integer.html">Integer</a> & GetSubgroupOrder()<span class="keyword"> const </span>{<span class="keywordflow">return</span> m_n;}00065 <a class="code" href="class_integer.html">Integer</a> GetCofactor() <span class="keyword">const</span>;00066 <span class="keywordtype">bool</span> ValidateGroup(<a class="code" href="class_random_number_generator.html">RandomNumberGenerator</a> &rng, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> level) <span class="keyword">const</span>;00067 <span class="keywordtype">bool</span> ValidateElement(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> level, <span class="keyword">const</span> Element &element, <span class="keyword">const</span> DL_FixedBasePrecomputation<Element> *precomp) <span class="keyword">const</span>;00068 <span class="keywordtype">bool</span> FastSubgroupCheckAvailable()<span class="keyword"> const </span>{<span class="keywordflow">return</span> <span class="keyword">false</span>;}00069 <span class="keywordtype">void</span> EncodeElement(<span class="keywordtype">bool</span> reversible, <span class="keyword">const</span> Element &element, byte *encoded)<span class="keyword"> const</span>00070 <span class="keyword"> </span>{00071 <span class="keywordflow">if</span> (reversible)00072 GetCurve().EncodePoint(encoded, element, m_compress);00073 <span class="keywordflow">else</span>00074 element.x.Encode(encoded, GetEncodedElementSize(<span class="keyword">false</span>));00075 }00076 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> GetEncodedElementSize(<span class="keywordtype">bool</span> reversible)<span class="keyword"> const</span>00077 <span class="keyword"> </span>{00078 <span class="keywordflow">if</span> (reversible)00079 <span class="keywordflow">return</span> GetCurve().EncodedPointSize(m_compress);00080 <span class="keywordflow">else</span>00081 <span class="keywordflow">return</span> GetCurve().GetField().MaxElementByteLength();00082 }00083 Element DecodeElement(<span class="keyword">const</span> byte *encoded, <span class="keywordtype">bool</span> checkForGroupMembership)<span class="keyword"> const</span>00084 <span class="keyword"> </span>{00085 Point result;00086 <span class="keywordflow">if</span> (!GetCurve().DecodePoint(result, encoded, GetEncodedElementSize(<span class="keyword">true</span>)))00087 <span class="keywordflow">throw</span> DL_BadElement();00088 <span class="keywordflow">if</span> (checkForGroupMembership && !ValidateElement(1, result, NULL))00089 <span class="keywordflow">throw</span> DL_BadElement();00090 <span class="keywordflow">return</span> result;⌨️ 快捷键说明
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