/* md4.cpp * * Copyright (C) 2003 Sawtooth Consulting Ltd. * * This file is part of yaSSL. * * yaSSL is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * yaSSL is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA */ /* based on Wei Dai's md4.cpp from CryptoPP */ #include "runtime.hpp" #include "md4.hpp" #include "algorithm.hpp" // mySTL::swap namespace TaoCrypt { void MD4::Init() { digest_[0] = 0x67452301L; digest_[1] = 0xefcdab89L; digest_[2] = 0x98badcfeL; digest_[3] = 0x10325476L; buffLen_ = 0; loLen_ = 0; hiLen_ = 0; } MD4::MD4(const MD4& that) : HASHwithTransform(DIGEST_SIZE / sizeof(word32), BLOCK_SIZE) { buffLen_ = that.buffLen_; loLen_ = that.loLen_; hiLen_ = that.hiLen_; memcpy(digest_, that.digest_, DIGEST_SIZE); memcpy(buffer_, that.buffer_, BLOCK_SIZE); } MD4& MD4::operator= (const MD4& that) { MD4 tmp(that); Swap(tmp); return *this; } void MD4::Swap(MD4& other) { mySTL::swap(loLen_, other.loLen_); mySTL::swap(hiLen_, other.hiLen_); mySTL::swap(buffLen_, other.buffLen_); memcpy(digest_, other.digest_, DIGEST_SIZE); memcpy(buffer_, other.buffer_, BLOCK_SIZE); } void MD4::Transform() { #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)+buffer_[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)+buffer_[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)+buffer_[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