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<h1>md4.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// md4.cpp - modified by Wei Dai from Andrew M. Kuchling's md4.c</span>
<a name="l00002"></a>00002 <span class="comment">// The original code and all modifications are in the public domain.</span>
<a name="l00003"></a>00003
<a name="l00004"></a>00004 <span class="comment">// This is the original introductory comment:</span>
<a name="l00005"></a>00005
<a name="l00006"></a>00006 <span class="comment">/*</span>
<a name="l00007"></a>00007 <span class="comment"> * md4.c : MD4 hash algorithm.</span>
<a name="l00008"></a>00008 <span class="comment"> *</span>
<a name="l00009"></a>00009 <span class="comment"> * Part of the Python Cryptography Toolkit, version 1.1</span>
<a name="l00010"></a>00010 <span class="comment"> *</span>
<a name="l00011"></a>00011 <span class="comment"> * Distribute and use freely; there are no restrictions on further </span>
<a name="l00012"></a>00012 <span class="comment"> * dissemination and usage except those imposed by the laws of your </span>
<a name="l00013"></a>00013 <span class="comment"> * country of residence.</span>
<a name="l00014"></a>00014 <span class="comment"> *</span>
<a name="l00015"></a>00015 <span class="comment"> */</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="preprocessor">#include "pch.h"</span>
<a name="l00018"></a>00018 <span class="preprocessor">#define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1</span>
<a name="l00019"></a>00019 <span class="preprocessor"></span><span class="preprocessor">#include "md4.h"</span>
<a name="l00020"></a>00020 <span class="preprocessor">#include "misc.h"</span>
<a name="l00021"></a>00021
<a name="l00022"></a>00022 NAMESPACE_BEGIN(CryptoPP)
<a name="l00023"></a>00023 namespace Weak1 {
<a name="l00024"></a>00024
<a name="l00025"></a>00025 <span class="keywordtype">void</span> MD4::InitState(HashWordType *state)
<a name="l00026"></a>00026 {
<a name="l00027"></a>00027 state[0] = 0x67452301L;
<a name="l00028"></a>00028 state[1] = 0xefcdab89L;
<a name="l00029"></a>00029 state[2] = 0x98badcfeL;
<a name="l00030"></a>00030 state[3] = 0x10325476L;
<a name="l00031"></a>00031 }
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="keywordtype">void</span> MD4::Transform (word32 *digest, <span class="keyword">const</span> word32 *in)
<a name="l00034"></a>00034 {
<a name="l00035"></a>00035 <span class="comment">// #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))</span>
<a name="l00036"></a>00036 <span class="preprocessor">#define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))</span>
<a name="l00037"></a>00037 <span class="preprocessor"></span><span class="preprocessor">#define G(x, y, z) (((x) & (y)) | ((x) & (z)) | ((y) & (z)))</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span><span class="preprocessor">#define H(x, y, z) ((x) ^ (y) ^ (z))</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span>
<a name="l00040"></a>00040 word32 A, B, C, D;
<a name="l00041"></a>00041
<a name="l00042"></a>00042 A=digest[0];
<a name="l00043"></a>00043 B=digest[1];
<a name="l00044"></a>00044 C=digest[2];
<a name="l00045"></a>00045 D=digest[3];
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <span class="preprocessor">#define function(a,b,c,d,k,s) a=rotlFixed(a+F(b,c,d)+in[k],s); </span>
<a name="l00048"></a>00048 <span class="preprocessor"></span> function(A,B,C,D, 0, 3);
<a name="l00049"></a>00049 function(D,A,B,C, 1, 7);
<a name="l00050"></a>00050 function(C,D,A,B, 2,11);
<a name="l00051"></a>00051 function(B,C,D,A, 3,19);
<a name="l00052"></a>00052 function(A,B,C,D, 4, 3);
<a name="l00053"></a>00053 function(D,A,B,C, 5, 7);
<a name="l00054"></a>00054 function(C,D,A,B, 6,11);
<a name="l00055"></a>00055 function(B,C,D,A, 7,19);
<a name="l00056"></a>00056 function(A,B,C,D, 8, 3);
<a name="l00057"></a>00057 function(D,A,B,C, 9, 7);
<a name="l00058"></a>00058 function(C,D,A,B,10,11);
<a name="l00059"></a>00059 function(B,C,D,A,11,19);
<a name="l00060"></a>00060 function(A,B,C,D,12, 3);
<a name="l00061"></a>00061 function(D,A,B,C,13, 7);
<a name="l00062"></a>00062 function(C,D,A,B,14,11);
<a name="l00063"></a>00063 function(B,C,D,A,15,19);
<a name="l00064"></a>00064
<a name="l00065"></a>00065 <span class="preprocessor">#undef function </span>
<a name="l00066"></a>00066 <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>
<a name="l00067"></a>00067 <span class="preprocessor"></span> function(A,B,C,D, 0, 3);
<a name="l00068"></a>00068 function(D,A,B,C, 4, 5);
<a name="l00069"></a>00069 function(C,D,A,B, 8, 9);
<a name="l00070"></a>00070 function(B,C,D,A,12,13);
<a name="l00071"></a>00071 function(A,B,C,D, 1, 3);
<a name="l00072"></a>00072 function(D,A,B,C, 5, 5);
<a name="l00073"></a>00073 function(C,D,A,B, 9, 9);
<a name="l00074"></a>00074 function(B,C,D,A,13,13);
<a name="l00075"></a>00075 function(A,B,C,D, 2, 3);
<a name="l00076"></a>00076 function(D,A,B,C, 6, 5);
<a name="l00077"></a>00077 function(C,D,A,B,10, 9);
<a name="l00078"></a>00078 function(B,C,D,A,14,13);
<a name="l00079"></a>00079 function(A,B,C,D, 3, 3);
<a name="l00080"></a>00080 function(D,A,B,C, 7, 5);
<a name="l00081"></a>00081 function(C,D,A,B,11, 9);
<a name="l00082"></a>00082 function(B,C,D,A,15,13);
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <span class="preprocessor">#undef function </span>
<a name="l00085"></a>00085 <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>
<a name="l00086"></a>00086 <span class="preprocessor"></span> function(A,B,C,D, 0, 3);
<a name="l00087"></a>00087 function(D,A,B,C, 8, 9);
<a name="l00088"></a>00088 function(C,D,A,B, 4,11);
<a name="l00089"></a>00089 function(B,C,D,A,12,15);
<a name="l00090"></a>00090 function(A,B,C,D, 2, 3);
<a name="l00091"></a>00091 function(D,A,B,C,10, 9);
<a name="l00092"></a>00092 function(C,D,A,B, 6,11);
<a name="l00093"></a>00093 function(B,C,D,A,14,15);
<a name="l00094"></a>00094 function(A,B,C,D, 1, 3);
<a name="l00095"></a>00095 function(D,A,B,C, 9, 9);
<a name="l00096"></a>00096 function(C,D,A,B, 5,11);
<a name="l00097"></a>00097 function(B,C,D,A,13,15);
<a name="l00098"></a>00098 function(A,B,C,D, 3, 3);
<a name="l00099"></a>00099 function(D,A,B,C,11, 9);
<a name="l00100"></a>00100 function(C,D,A,B, 7,11);
<a name="l00101"></a>00101 function(B,C,D,A,15,15);
<a name="l00102"></a>00102
<a name="l00103"></a>00103 digest[0]+=A;
<a name="l00104"></a>00104 digest[1]+=B;
<a name="l00105"></a>00105 digest[2]+=C;
<a name="l00106"></a>00106 digest[3]+=D;
<a name="l00107"></a>00107 }
<a name="l00108"></a>00108
<a name="l00109"></a>00109 }
<a name="l00110"></a>00110 NAMESPACE_END
</pre></div></div>
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