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md4.cpp

00001 // md4.cpp - modified by Wei Dai from Andrew M. Kuchling's md4.c 00002 // The original code and all modifications are in the public domain. 00003 00004 // This is the original introductory comment: 00005 00006 /* 00007 * md4.c : MD4 hash algorithm. 00008 * 00009 * Part of the Python Cryptography Toolkit, version 1.1 00010 * 00011 * Distribute and use freely; there are no restrictions on further 00012 * dissemination and usage except those imposed by the laws of your 00013 * country of residence. 00014 * 00015 */ 00016 00017 #include "pch.h" 00018 #include "md4.h" 00019 #include "misc.h" 00020 00021 NAMESPACE_BEGIN(CryptoPP) 00022 00023 void MD4::InitState(HashWordType *state) 00024 { 00025 state[0] = 0x67452301L; 00026 state[1] = 0xefcdab89L; 00027 state[2] = 0x98badcfeL; 00028 state[3] = 0x10325476L; 00029 } 00030 00031 void MD4::Transform (word32 *digest, const word32 *in) 00032 { 00033 // #define F(x, y, z) (((x) & (y)) | ((~x) & (z))) 00034 #define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z)))) 00035 #define G(x, y, z) (((x) & (y)) | ((x) & (z)) | ((y) & (z))) 00036 #define H(x, y, z) ((x) ^ (y) ^ (z)) 00037 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 #define function(a,b,c,d,k,s) a=rotlFixed(a+F(b,c,d)+in[k],s); 00046 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 #undef function 00064 #define function(a,b,c,d,k,s) a=rotlFixed(a+G(b,c,d)+in[k]+0x5a827999,s); 00065 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 #undef function 00083 #define function(a,b,c,d,k,s) a=rotlFixed(a+H(b,c,d)+in[k]+0x6ed9eba1,s); 00084 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

Generated on Wed Jul 21 19:15:28 2004 for Crypto++ by doxygen 1.3.7-20040704