From a3b6ece7ab341b5b14135baeccea7d5e4c086771 Mon Sep 17 00:00:00 2001 From: weidai Date: Fri, 4 Oct 2002 17:31:41 +0000 Subject: Initial revision --- md4.cpp | 107 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 107 insertions(+) create mode 100644 md4.cpp (limited to 'md4.cpp') diff --git a/md4.cpp b/md4.cpp new file mode 100644 index 00000000..525f0c8f --- /dev/null +++ b/md4.cpp @@ -0,0 +1,107 @@ +// md4.cpp - modified by Wei Dai from Andrew M. Kuchling's md4.c +// The original code and all modifications are in the public domain. + +// This is the original introductory comment: + +/* + * md4.c : MD4 hash algorithm. + * + * Part of the Python Cryptography Toolkit, version 1.1 + * + * Distribute and use freely; there are no restrictions on further + * dissemination and usage except those imposed by the laws of your + * country of residence. + * + */ + +#include "pch.h" +#include "md4.h" +#include "misc.h" + +NAMESPACE_BEGIN(CryptoPP) + +void MD4::Init() +{ + m_digest[0] = 0x67452301L; + m_digest[1] = 0xefcdab89L; + m_digest[2] = 0x98badcfeL; + m_digest[3] = 0x10325476L; +} + +void MD4::Transform (word32 *digest, const word32 *in) +{ +// #define F(x, y, z) (((x) & (y)) | ((~x) & (z))) +#define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z)))) +#define G(x, y, z) (((x) & (y)) | ((x) & (z)) | ((y) & (z))) +#define H(x, y, z) ((x) ^ (y) ^ (z)) + + word32 A, B, C, D; + + A=digest[0]; + B=digest[1]; + C=digest[2]; + D=digest[3]; + +#define function(a,b,c,d,k,s) a=rotlFixed(a+F(b,c,d)+in[k],s); + function(A,B,C,D, 0, 3); + function(D,A,B,C, 1, 7); + function(C,D,A,B, 2,11); + function(B,C,D,A, 3,19); + function(A,B,C,D, 4, 3); + function(D,A,B,C, 5, 7); + function(C,D,A,B, 6,11); + function(B,C,D,A, 7,19); + function(A,B,C,D, 8, 3); + function(D,A,B,C, 9, 7); + function(C,D,A,B,10,11); + function(B,C,D,A,11,19); + function(A,B,C,D,12, 3); + function(D,A,B,C,13, 7); + function(C,D,A,B,14,11); + function(B,C,D,A,15,19); + +#undef function +#define function(a,b,c,d,k,s) a=rotlFixed(a+G(b,c,d)+in[k]+0x5a827999,s); + function(A,B,C,D, 0, 3); + function(D,A,B,C, 4, 5); + function(C,D,A,B, 8, 9); + function(B,C,D,A,12,13); + function(A,B,C,D, 1, 3); + function(D,A,B,C, 5, 5); + function(C,D,A,B, 9, 9); + function(B,C,D,A,13,13); + function(A,B,C,D, 2, 3); + function(D,A,B,C, 6, 5); + function(C,D,A,B,10, 9); + function(B,C,D,A,14,13); + function(A,B,C,D, 3, 3); + function(D,A,B,C, 7, 5); + function(C,D,A,B,11, 9); + function(B,C,D,A,15,13); + +#undef function +#define function(a,b,c,d,k,s) a=rotlFixed(a+H(b,c,d)+in[k]+0x6ed9eba1,s); + function(A,B,C,D, 0, 3); + function(D,A,B,C, 8, 9); + function(C,D,A,B, 4,11); + function(B,C,D,A,12,15); + function(A,B,C,D, 2, 3); + function(D,A,B,C,10, 9); + function(C,D,A,B, 6,11); + function(B,C,D,A,14,15); + function(A,B,C,D, 1, 3); + function(D,A,B,C, 9, 9); + function(C,D,A,B, 5,11); + function(B,C,D,A,13,15); + function(A,B,C,D, 3, 3); + function(D,A,B,C,11, 9); + function(C,D,A,B, 7,11); + function(B,C,D,A,15,15); + + digest[0]+=A; + digest[1]+=B; + digest[2]+=C; + digest[3]+=D; +} + +NAMESPACE_END -- cgit v1.2.1