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<h1>md4.cpp</h1><pre class="fragment"><div>00001 <span class="comment">// md4.cpp - modified by Wei Dai from Andrew M. Kuchling's md4.c</span>
00002 <span class="comment">// The original code and all modifications are in the public domain.</span>
00003
00004 <span class="comment">// This is the original introductory comment:</span>
00005
00006 <span class="comment">/*</span>
00007 <span class="comment"> * md4.c : MD4 hash algorithm.</span>
00008 <span class="comment"> *</span>
00009 <span class="comment"> * Part of the Python Cryptography Toolkit, version 1.1</span>
00010 <span class="comment"> *</span>
00011 <span class="comment"> * Distribute and use freely; there are no restrictions on further </span>
00012 <span class="comment"> * dissemination and usage except those imposed by the laws of your </span>
00013 <span class="comment"> * country of residence.</span>
00014 <span class="comment"> *</span>
00015 <span class="comment"> */</span>
00016
00017 <span class="preprocessor">#include "pch.h"</span>
00018 <span class="preprocessor">#include "md4.h"</span>
00019 <span class="preprocessor">#include "misc.h"</span>
00020
00021 NAMESPACE_BEGIN(CryptoPP)
00022
00023 void <a class="code" href="class_m_d4.html">MD4</a>::InitState(HashWordType *state)
00024 {
00025 state[0] = 0x67452301L;
00026 state[1] = 0xefcdab89L;
00027 state[2] = 0x98badcfeL;
00028 state[3] = 0x10325476L;
00029 }
00030
00031 <span class="keywordtype">void</span> MD4::Transform (word32 *digest, <span class="keyword">const</span> word32 *in)
00032 {
00033 <span class="comment">// #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))</span>
00034 <span class="preprocessor">#define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))</span>
00035 <span class="preprocessor"></span><span class="preprocessor">#define G(x, y, z) (((x) & (y)) | ((x) & (z)) | ((y) & (z)))</span>
00036 <span class="preprocessor"></span><span class="preprocessor">#define H(x, y, z) ((x) ^ (y) ^ (z))</span>
00037 <span class="preprocessor"></span>
00038 word32 A, B, C, D;
00039
00040 A=digest[0];
00041 B=digest[1];
00042 C=digest[2];
00043 D=digest[3];
00044
00045 <span class="preprocessor">#define function(a,b,c,d,k,s) a=rotlFixed(a+F(b,c,d)+in[k],s); </span>
00046 <span class="preprocessor"></span> function(A,B,C,D, 0, 3);
00047 function(D,A,B,C, 1, 7);
00048 function(C,D,A,B, 2,11);
00049 function(B,C,D,A, 3,19);
00050 function(A,B,C,D, 4, 3);
00051 function(D,A,B,C, 5, 7);
00052 function(C,D,A,B, 6,11);
00053 function(B,C,D,A, 7,19);
00054 function(A,B,C,D, 8, 3);
00055 function(D,A,B,C, 9, 7);
00056 function(C,D,A,B,10,11);
00057 function(B,C,D,A,11,19);
00058 function(A,B,C,D,12, 3);
00059 function(D,A,B,C,13, 7);
00060 function(C,D,A,B,14,11);
00061 function(B,C,D,A,15,19);
00062
00063 <span class="preprocessor">#undef function </span>
00064 <span class="preprocessor"></span><span class="preprocessor">#define function(a,b,c,d,k,s) a=rotlFixed(a+G(b,c,d)+in[k]+0x5a827999,s); </span>
00065 <span class="preprocessor"></span> function(A,B,C,D, 0, 3);
00066 function(D,A,B,C, 4, 5);
00067 function(C,D,A,B, 8, 9);
00068 function(B,C,D,A,12,13);
00069 function(A,B,C,D, 1, 3);
00070 function(D,A,B,C, 5, 5);
00071 function(C,D,A,B, 9, 9);
00072 function(B,C,D,A,13,13);
00073 function(A,B,C,D, 2, 3);
00074 function(D,A,B,C, 6, 5);
00075 function(C,D,A,B,10, 9);
00076 function(B,C,D,A,14,13);
00077 function(A,B,C,D, 3, 3);
00078 function(D,A,B,C, 7, 5);
00079 function(C,D,A,B,11, 9);
00080 function(B,C,D,A,15,13);
00081
00082 <span class="preprocessor">#undef function </span>
00083 <span class="preprocessor"></span><span class="preprocessor">#define function(a,b,c,d,k,s) a=rotlFixed(a+H(b,c,d)+in[k]+0x6ed9eba1,s); </span>
00084 <span class="preprocessor"></span> function(A,B,C,D, 0, 3);
00085 function(D,A,B,C, 8, 9);
00086 function(C,D,A,B, 4,11);
00087 function(B,C,D,A,12,15);
00088 function(A,B,C,D, 2, 3);
00089 function(D,A,B,C,10, 9);
00090 function(C,D,A,B, 6,11);
00091 function(B,C,D,A,14,15);
00092 function(A,B,C,D, 1, 3);
00093 function(D,A,B,C, 9, 9);
00094 function(C,D,A,B, 5,11);
00095 function(B,C,D,A,13,15);
00096 function(A,B,C,D, 3, 3);
00097 function(D,A,B,C,11, 9);
00098 function(C,D,A,B, 7,11);
00099 function(B,C,D,A,15,15);
00100
00101 digest[0]+=A;
00102 digest[1]+=B;
00103 digest[2]+=C;
00104 digest[3]+=D;
00105 }
00106
00107 NAMESPACE_END
</div></pre><hr size="1"><address style="align: right;"><small>Generated on Sun Nov 7 08:23:58 2004 for Crypto++ by
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