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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++: ttmac.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>ttmac.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// ttmac.cpp - written and placed in the public domain by Kevin Springle</span><a name="l00002"></a>00002 <a name="l00003"></a>00003 <span class="preprocessor">#include "pch.h"</span><a name="l00004"></a>00004 <span class="preprocessor">#include "ttmac.h"</span><a name="l00005"></a>00005 <span class="preprocessor">#include "misc.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_t_t_m_a_c___base.html#0a03fa229e48b33f1990d1495aeffe8d">00009</a> void <a class="code" href="class_t_t_m_a_c___base.html" title="_">TTMAC_Base</a>::UncheckedSetKey(const byte *userKey, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> keylength, const <a class="code" href="class_name_value_pairs.html" title="interface for retrieving values given their names">NameValuePairs</a> &)<a name="l00010"></a>00010 {<a name="l00011"></a>00011 AssertValidKeyLength(keylength);<a name="l00012"></a>00012 <a name="l00013"></a>00013 memcpy(m_key, userKey, KEYLENGTH);<a name="l00014"></a>00014 CorrectEndianess(m_key, m_key, KEYLENGTH);<a name="l00015"></a>00015 <a name="l00016"></a>00016 Init();<a name="l00017"></a>00017 }<a name="l00018"></a>00018 <a name="l00019"></a><a class="code" href="class_t_t_m_a_c___base.html#58be914986bca1fa4a53fe051707e774">00019</a> <span class="keywordtype">void</span> <a class="code" href="class_t_t_m_a_c___base.html#58be914986bca1fa4a53fe051707e774">TTMAC_Base::Init</a>()<a name="l00020"></a>00020 {<a name="l00021"></a>00021 <a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>[0] = <a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>[5] = <a class="code" href="class_t_t_m_a_c___base.html#683a6af755d347456a2043783d07d703">m_key</a>[0];<a name="l00022"></a>00022 <a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>[1] = <a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>[6] = <a class="code" href="class_t_t_m_a_c___base.html#683a6af755d347456a2043783d07d703">m_key</a>[1];<a name="l00023"></a>00023 <a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>[2] = <a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>[7] = <a class="code" href="class_t_t_m_a_c___base.html#683a6af755d347456a2043783d07d703">m_key</a>[2];<a name="l00024"></a>00024 <a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>[3] = <a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>[8] = <a class="code" href="class_t_t_m_a_c___base.html#683a6af755d347456a2043783d07d703">m_key</a>[3];<a name="l00025"></a>00025 <a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>[4] = <a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>[9] = <a class="code" href="class_t_t_m_a_c___base.html#683a6af755d347456a2043783d07d703">m_key</a>[4];<a name="l00026"></a>00026 }<a name="l00027"></a>00027 <a name="l00028"></a><a class="code" href="class_t_t_m_a_c___base.html#52333eb53e716948e9377cdfea28addd">00028</a> <span class="keywordtype">void</span> <a class="code" href="class_t_t_m_a_c___base.html#52333eb53e716948e9377cdfea28addd" title="truncated version of Final()">TTMAC_Base::TruncatedFinal</a>(byte *hash, <span class="keywordtype">size_t</span> size)<a name="l00029"></a>00029 {<a name="l00030"></a>00030 <a class="code" href="class_iterated_hash_base.html#01f39339fa69510303ad401245df1037">PadLastBlock</a>(<a class="code" href="class_iterated_hash.html#76cb174a108aa1178e444681c0d8c2ff" title="block size of underlying compression function, or 0 if not block based">BlockSize</a>() - 2*<span class="keyword">sizeof</span>(<a class="code" href="class_iterated_hash.html#ce0350088eea8679cbe23668d2498c07">HashWordType</a>));<a name="l00031"></a>00031 <a class="code" href="class_iterated_hash.html#394a6ed0dd2a885652cd203ad4fa5fe0">CorrectEndianess</a>(<a class="code" href="class_iterated_hash.html#d1d059e2cba2115f403befa9e6c070da">m_data</a>, <a class="code" href="class_iterated_hash.html#d1d059e2cba2115f403befa9e6c070da">m_data</a>, <a class="code" href="class_iterated_hash.html#76cb174a108aa1178e444681c0d8c2ff" title="block size of underlying compression function, or 0 if not block based">BlockSize</a>() - 2*<span class="keyword">sizeof</span>(HashWordType));<a name="l00032"></a>00032 <a name="l00033"></a>00033 <a class="code" href="class_iterated_hash.html#d1d059e2cba2115f403befa9e6c070da">m_data</a>[<a class="code" href="class_iterated_hash.html#d1d059e2cba2115f403befa9e6c070da">m_data</a>.<a class="code" href="class_sec_block.html#f5999bffe3193e62719cc0792b0282a7">size</a>()-2] = <a class="code" href="class_iterated_hash_base.html#a2dadd15d5ef537cf6e0286f42ab62c8">GetBitCountLo</a>();<a name="l00034"></a>00034 <a class="code" href="class_iterated_hash.html#d1d059e2cba2115f403befa9e6c070da">m_data</a>[<a class="code" href="class_iterated_hash.html#d1d059e2cba2115f403befa9e6c070da">m_data</a>.<a class="code" href="class_sec_block.html#f5999bffe3193e62719cc0792b0282a7">size</a>()-1] = <a class="code" href="class_iterated_hash_base.html#db8961e69e48b194b83815d5466f8e7d">GetBitCountHi</a>();<a name="l00035"></a>00035 <a name="l00036"></a>00036 <a class="code" href="class_t_t_m_a_c___base.html#e56843838204b2338ce3f2e53932280a">Transform</a>(<a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>, <a class="code" href="class_iterated_hash.html#d1d059e2cba2115f403befa9e6c070da">m_data</a>, <span class="keyword">true</span>);<a name="l00037"></a>00037 <a name="l00038"></a>00038 word32 t2 = <a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>[2];<a name="l00039"></a>00039 word32 t3 = <a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>[3];<a name="l00040"></a>00040 <span class="keywordflow">if</span> (size != <a class="code" href="class_t_t_m_a_c___base.html#e82f65af091adcea740c399e31f6c17c">DIGESTSIZE</a>)<a name="l00041"></a>00041 {<a name="l00042"></a>00042 <span class="keywordflow">switch</span> (size)<a name="l00043"></a>00043 {<a name="l00044"></a>00044 <span class="keywordflow">case</span> 16:<a name="l00045"></a>00045 <a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>[3] += <a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>[1] + <a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>[4];<a name="l00046"></a>00046 <a name="l00047"></a>00047 <span class="keywordflow">case</span> 12:<a name="l00048"></a>00048 m_digest[2] += m_digest[0] + t3;<a name="l00049"></a>00049 <a name="l00050"></a>00050 <span class="keywordflow">case</span> 8:<a name="l00051"></a>00051 m_digest[0] += m_digest[1] + t3;<a name="l00052"></a>00052 m_digest[1] += m_digest[4] + t2;<a name="l00053"></a>00053 <span class="keywordflow">break</span>;<a name="l00054"></a>00054 <a name="l00055"></a>00055 <span class="keywordflow">case</span> 4:<a name="l00056"></a>00056 m_digest[0] +=<a name="l00057"></a>00057 m_digest[1] +<a name="l00058"></a>00058 m_digest[2] +<a name="l00059"></a>00059 m_digest[3] +<a name="l00060"></a>00060 m_digest[4];<a name="l00061"></a>00061 <span class="keywordflow">break</span>;<a name="l00062"></a>00062 <a name="l00063"></a>00063 <span class="keywordflow">case</span> 0:<a name="l00064"></a>00064 <span class="comment">// Used by HashTransformation::Restart()</span><a name="l00065"></a>00065 <span class="keywordflow">break</span>;<a name="l00066"></a>00066 <a name="l00067"></a>00067 <span class="keywordflow">default</span>:<a name="l00068"></a>00068 <span class="keywordflow">throw</span> <a class="code" href="class_invalid_argument.html" title="exception thrown when an invalid argument is detected">InvalidArgument</a>(<span class="stringliteral">"TTMAC_Base: can't truncate a Two-Track-MAC 20 byte digest to "</span> + IntToString(size) + <span class="stringliteral">" bytes"</span>);<a name="l00069"></a>00069 <span class="keywordflow">break</span>;<a name="l00070"></a>00070 }<a name="l00071"></a>00071 }<a name="l00072"></a>00072 <a name="l00073"></a>00073 <a class="code" href="class_iterated_hash.html#394a6ed0dd2a885652cd203ad4fa5fe0">CorrectEndianess</a>(<a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>, <a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>, size);<a name="l00074"></a>00074 memcpy(hash, <a class="code" href="class_t_t_m_a_c___base.html#8ab3de4f6093f8fb0c1266063f5ae157">m_digest</a>, size);<a name="l00075"></a>00075 <a name="l00076"></a>00076 <a class="code" href="class_iterated_hash_base.html#d53da712634ea213ad047b2a68b0fe70" title="discard the current state, and restart with a new message">Restart</a>(); <span class="comment">// reinit for next use</span><a name="l00077"></a>00077 }<a name="l00078"></a>00078 <a name="l00079"></a>00079 <span class="comment">// RIPEMD-160 definitions used by Two-Track-MAC</span><a name="l00080"></a>00080 <a name="l00081"></a>00081 <span class="preprocessor">#define F(x, y, z) (x ^ y ^ z)</span><a name="l00082"></a>00082 <span class="preprocessor"></span><span class="preprocessor">#define G(x, y, z) (z ^ (x & (y^z)))</span><a name="l00083"></a>00083 <span class="preprocessor"></span><span class="preprocessor">#define H(x, y, z) (z ^ (x | ~y))</span><a name="l00084"></a>00084 <span class="preprocessor"></span><span class="preprocessor">#define I(x, y, z) (y ^ (z & (x^y)))</span><a name="l00085"></a>00085 <span class="preprocessor"></span><span class="preprocessor">#define J(x, y, z) (x ^ (y | ~z))</span><a name="l00086"></a>00086 <span class="preprocessor"></span><a name="l00087"></a>00087 <span class="preprocessor">#define k0 0</span><a name="l00088"></a>00088 <span class="preprocessor"></span><span class="preprocessor">#define k1 0x5a827999UL</span><a name="l00089"></a>00089 <span class="preprocessor"></span><span class="preprocessor">#define k2 0x6ed9eba1UL</span><a name="l00090"></a>00090 <span class="preprocessor"></span><span class="preprocessor">#define k3 0x8f1bbcdcUL</span><a name="l00091"></a>00091 <span class="preprocessor"></span><span class="preprocessor">#define k4 0xa953fd4eUL</span><a name="l00092"></a>00092 <span class="preprocessor"></span><span class="preprocessor">#define k5 0x50a28be6UL</span><a name="l00093"></a>00093 <span class="preprocessor"></span><span class="preprocessor">#define k6 0x5c4dd124UL</span><a name="l00094"></a>00094 <span class="preprocessor"></span><span class="preprocessor">#define k7 0x6d703ef3UL</span><a name="l00095"></a>00095 <span class="preprocessor"></span><span class="preprocessor">#define k8 0x7a6d76e9UL</span><a name="l00096"></a>00096 <span class="preprocessor"></span><span class="preprocessor">#define k9 0</span><a name="l00097"></a>00097 <span class="preprocessor"></span><a name="l00098"></a><a class="code" href="class_t_t_m_a_c___base.html#e56843838204b2338ce3f2e53932280a">00098</a> <span class="keywordtype">void</span> <a class="code" href="class_t_t_m_a_c___base.html#e56843838204b2338ce3f2e53932280a">TTMAC_Base::Transform</a>(word32 *digest, <span class="keyword">const</span> word32 *X, <span class="keywordtype">bool</span> last)<a name="l00099"></a>00099 {<a name="l00100"></a>00100 <span class="preprocessor">#define Subround(f, a, b, c, d, e, x, s, k) \</span><a name="l00101"></a>00101 <span class="preprocessor"> a += f(b, c, d) + x + k;\</span>⌨️ 快捷键说明
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