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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++: panama.cpp 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>panama.cpp</h1><div class="fragment"><pre>00001 <span class="comment">// panama.cpp - written and placed in the public domain by Wei Dai</span>00002 00003 <span class="preprocessor">#include "pch.h"</span>00004 <span class="preprocessor">#include "panama.h"</span>00005 <span class="preprocessor">#include "misc.h"</span>00006 00007 NAMESPACE_BEGIN(CryptoPP)00008 00009 <span class="keyword">template</span> <<span class="keyword">class</span> B>00010 <span class="keywordtype">void</span> <a class="code" href="class_panama.html">Panama<B>::Reset</a>()00011 {00012 m_bstart = 0;00013 memset(m_state, 0, m_state.size()*4);00014 }00015 00016 <span class="keyword">template</span> <<span class="keyword">class</span> B>00017 <span class="keywordtype">void</span> <a class="code" href="class_panama.html">Panama<B>::Iterate</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> count, <span class="keyword">const</span> word32 *p, word32 *z, <span class="keyword">const</span> word32 *y)00018 {00019 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> bstart = m_bstart;00020 word32 *<span class="keyword">const</span> a = m_state;00021 <span class="preprocessor">#define c (a+17)</span>00022 <span class="preprocessor"></span><span class="preprocessor">#define b ((Stage *)(a+34))</span>00023 <span class="preprocessor"></span>00024 <span class="comment">// output</span>00025 <span class="preprocessor">#define OA(i) z[i] = ConditionalByteReverse(B::ToEnum(), a[i+9])</span>00026 <span class="preprocessor"></span><span class="preprocessor">#define OX(i) z[i] = y[i] ^ ConditionalByteReverse(B::ToEnum(), a[i+9])</span>00027 <span class="preprocessor"></span><span class="comment">// buffer update</span>00028 <span class="preprocessor">#define US(i) {word32 t=b0[i]; b0[i]=ConditionalByteReverse(B::ToEnum(), p[i])^t; b25[(i+6)%8]^=t;}</span>00029 <span class="preprocessor"></span><span class="preprocessor">#define UL(i) {word32 t=b0[i]; b0[i]=a[i+1]^t; b25[(i+6)%8]^=t;}</span>00030 <span class="preprocessor"></span><span class="comment">// gamma and pi</span>00031 <span class="preprocessor">#define GP(i) c[5*i%17] = rotlFixed(a[i] ^ (a[(i+1)%17] | ~a[(i+2)%17]), ((5*i%17)*((5*i%17)+1)/2)%32)</span>00032 <span class="preprocessor"></span><span class="comment">// theta and sigma</span>00033 <span class="preprocessor">#define T(i,x) a[i] = c[i] ^ c[(i+1)%17] ^ c[(i+4)%17] ^ x</span>00034 <span class="preprocessor"></span><span class="preprocessor">#define TS1S(i) T(i+1, ConditionalByteReverse(B::ToEnum(), p[i]))</span>00035 <span class="preprocessor"></span><span class="preprocessor">#define TS1L(i) T(i+1, b4[i])</span>00036 <span class="preprocessor"></span><span class="preprocessor">#define TS2(i) T(i+9, b16[i])</span>00037 <span class="preprocessor"></span>00038 <span class="keywordflow">while</span> (count--)00039 {00040 <span class="keywordflow">if</span> (z)00041 {00042 <span class="keywordflow">if</span> (y)00043 {00044 OX(0); OX(1); OX(2); OX(3); OX(4); OX(5); OX(6); OX(7);00045 y += 8;00046 }00047 <span class="keywordflow">else</span>00048 {00049 OA(0); OA(1); OA(2); OA(3); OA(4); OA(5); OA(6); OA(7);00050 }00051 z += 8;00052 }00053 00054 word32 *<span class="keyword">const</span> b16 = b[(bstart+16) % STAGES];00055 word32 *<span class="keyword">const</span> b4 = b[(bstart+4) % STAGES];00056 bstart = (bstart + STAGES - 1) % STAGES;00057 word32 *<span class="keyword">const</span> b0 = b[bstart];00058 word32 *<span class="keyword">const</span> b25 = b[(bstart+25) % STAGES];00059 00060 00061 <span class="keywordflow">if</span> (p)00062 {00063 US(0); US(1); US(2); US(3); US(4); US(5); US(6); US(7);00064 }00065 <span class="keywordflow">else</span>00066 {00067 UL(0); UL(1); UL(2); UL(3); UL(4); UL(5); UL(6); UL(7);00068 }00069 00070 GP(0); GP(1); GP(2); GP(3); GP(4); GP(5); GP(6); GP(7);00071 GP(8); GP(9); GP(10); GP(11); GP(12); GP(13); GP(14); GP(15); GP(16);00072 00073 T(0,1);00074 00075 <span class="keywordflow">if</span> (p)00076 {00077 TS1S(0); TS1S(1); TS1S(2); TS1S(3); TS1S(4); TS1S(5); TS1S(6); TS1S(7);00078 p += 8;00079 }00080 <span class="keywordflow">else</span>00081 {00082 TS1L(0); TS1L(1); TS1L(2); TS1L(3); TS1L(4); TS1L(5); TS1L(6); TS1L(7);00083 }00084 00085 TS2(0); TS2(1); TS2(2); TS2(3); TS2(4); TS2(5); TS2(6); TS2(7);00086 }00087 m_bstart = bstart;00088 }00089 00090 <span class="keyword">template</span> <<span class="keyword">class</span> B>00091 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_panama_hash.html">PanamaHash<B>::HashMultipleBlocks</a>(<span class="keyword">const</span> word32 *input, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length)00092 {00093 Iterate(length / BLOCKSIZE, input);00094 <span class="keywordflow">return</span> length % BLOCKSIZE;00095 }00096 00097 <span class="keyword">template</span> <<span class="keyword">class</span> B><a name="l00098"></a><a class="code" href="class_panama_hash.html#_panama_m_a_c___basea2">00098</a> <span class="keywordtype">void</span> <a class="code" href="class_panama_hash.html#_panama_m_a_c___basea2">PanamaHash<B>::TruncatedFinal</a>(byte *hash, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> size)00099 {00100 ThrowIfInvalidTruncatedSize(size);00101 00102 PadLastBlock(BLOCKSIZE, 0x01);00103 00104 vTransform(m_data);00105 00106 Iterate(32); <span class="comment">// pull</span>00107 00108 ConditionalByteReverse(B::ToEnum(), m_state+9, m_state+9, DIGESTSIZE);00109 memcpy(hash, m_state+9, size);00110 00111 <a class="code" href="class_hash_transformation.html#_x_m_a_c_ca8">Restart</a>(); <span class="comment">// reinit for next use</span>00112 }00113 00114 <span class="keyword">template</span> <<span class="keyword">class</span> B>00115 <span class="keywordtype">void</span> <a class="code" href="class_panama_cipher_policy.html">PanamaCipherPolicy<B>::CipherSetKey</a>(<span class="keyword">const</span> <a class="code" href="class_name_value_pairs.html">NameValuePairs</a> &params, <span class="keyword">const</span> byte *key, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length)00116 {00117 FixedSizeSecBlock<word32, 8> buf;00118 00119 Reset();00120 memcpy(buf, key, 32);00121 Iterate(1, buf);00122 <span class="keywordflow">if</span> (length == 64)00123 memcpy(buf, key+32, 32);00124 <span class="keywordflow">else</span>00125 memset(buf, 0, 32);00126 Iterate(1, buf);00127 00128 Iterate(32);00129 }00130 00131 <span class="keyword">template</span> <<span class="keyword">class</span> B>00132 <span class="keywordtype">void</span> <a class="code" href="class_panama_cipher_policy.html">PanamaCipherPolicy<B>::OperateKeystream</a>(KeystreamOperation operation, byte *output, <span class="keyword">const</span> byte *input, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> iterationCount)00133 {00134 Iterate(iterationCount, NULL, (word32 *)output, (<span class="keyword">const</span> word32 *)input);00135 }00136 00137 <span class="keyword">template</span> <span class="keyword">class </span><a class="code" href="class_panama.html">Panama<BigEndian></a>;00138 <span class="keyword">template</span> <span class="keyword">class </span><a class="code" href="class_panama.html">Panama<LittleEndian></a>;00139 00140 <span class="keyword">template</span> <span class="keyword">class </span><a class="code" href="class_panama_hash.html">PanamaHash<BigEndian></a>;00141 <span class="keyword">template</span> <span class="keyword">class </span><a class="code" href="class_panama_hash.html">PanamaHash<LittleEndian></a>;00142 00143 <span class="keyword">template</span> <span class="keyword">class </span><a class="code" href="class_panama_cipher_policy.html">PanamaCipherPolicy<BigEndian></a>;00144 <span class="keyword">template</span> <span class="keyword">class </span><a class="code" href="class_panama_cipher_policy.html">PanamaCipherPolicy<LittleEndian></a>;00145 00146 NAMESPACE_END</pre></div><hr size="1"><address style="align: right;"><small>Generated on Tue Jul 8 23:34:21 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>⌨️ 快捷键说明
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