source: branches/samba-3.2.x/source/lib/md4.c@ 715

/* 
   Unix SMB/CIFS implementation.
   a implementation of MD4 designed for use in the SMB authentication protocol
   Copyright (C) Andrew Tridgell 1997-1998.
   
   This program 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 3 of the License, or
   (at your option) any later version.
   
   This program 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, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"

/* NOTE: This code makes no attempt to be fast! 

   It assumes that a int is at least 32 bits long
*/

#if 0
static uint32 A, B, C, D;
#else
#define A (state[0])
#define B (state[1])
#define C (state[2])
#define D (state[3])
#endif

static uint32 F(uint32 X, uint32 Y, uint32 Z)
{
        return (X&Y) | ((~X)&Z);
}

static uint32 G(uint32 X, uint32 Y, uint32 Z)
{
        return (X&Y) | (X&Z) | (Y&Z); 
}

static uint32 H(uint32 X, uint32 Y, uint32 Z)
{
        return X^Y^Z;
}

static uint32 lshift(uint32 x, int s)
{
        x &= 0xFFFFFFFF;
        return ((x<<s)&0xFFFFFFFF) | (x>>(32-s));
}

#define ROUND1(a,b,c,d,k,s) a = lshift(a + F(b,c,d) + X[k], s)