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/** \ingroup HASH_md5_m HASH_m
* \file md5.c
*
* MD5 hash function, code.
*/
/*
* Copyright (c) 2000 Virtual Unlimited B.V.
*
* Author: Bob Deblier <bob@virtualunlimited.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "system.h"
#include "md5.h"
#include "mp.h"
#include "endianness.h"
#include "debug.h"
/** \ingroup HASH_md5_m
*/
/*@observer@*/ /*@unchecked@*/
static uint32 md5hinit[4] = { 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476 };
/*@-sizeoftype@*/
const hashFunction md5 = { "MD5", sizeof(md5Param), 64, 4 * sizeof(uint32), (hashFunctionReset) md5Reset, (hashFunctionUpdate) md5Update, (hashFunctionDigest) md5Digest };
/*@=sizeoftype@*/
/*@-boundswrite@*/
int md5Reset(register md5Param* p)
{
mp32copy(4, p->h, md5hinit);
mp32zero(16, p->data);
p->length = 0;
p->offset = 0;
return 0;
}
/*@=boundswrite@*/
#define FF(a, b, c, d, w, s, t) \
a += ((b&(c^d))^d) + w + t; \
a = ROTL32(a, s); \
a += b;
#define GG(a, b, c, d, w, s, t) \
a += ((d&(b^c))^c) + w + t; \
a = ROTL32(a, s); \
a += b;
#define HH(a, b, c, d, w, s, t) \
a += (b^c^d) + w + t; \
a = ROTL32(a, s); \
a += b;
#define II(a, b, c, d, w, s, t) \
a += (c^(b|~d)) + w + t; \
a = ROTL32(a, s); \
a += b;
#ifndef ASM_MD5PROCESS
/*@-boundsread@*/
void md5Process(md5Param* p)
{
register uint32 a,b,c,d;
register uint32* w;
#if WORDS_BIGENDIAN
register byte t;
#endif
w = p->data;
#if WORDS_BIGENDIAN
t = 16;
while (t--)
{
register uint32 temp = swapu32(*w);
*(w++) = temp;
}
w = p->data;
#endif
a = p->h[0]; b = p->h[1]; c = p->h[2]; d = p->h[3];
FF(a, b, c, d, w[ 0], 7, 0xd76aa478);
FF(d, a, b, c, w[ 1], 12, 0xe8c7b756);
FF(c, d, a, b, w[ 2], 17, 0x242070db);
FF(b, c, d, a, w[ 3], 22, 0xc1bdceee);
FF(a, b, c, d, w[ 4], 7, 0xf57c0faf);
FF(d, a, b, c, w[ 5], 12, 0x4787c62a);
FF(c, d, a, b, w[ 6], 17, 0xa8304613);
FF(b, c, d, a, w[ 7], 22, 0xfd469501);
FF(a, b, c, d, w[ 8], 7, 0x698098d8);
FF(d, a, b, c, w[ 9], 12, 0x8b44f7af);
FF(c, d, a, b, w[10], 17, 0xffff5bb1);
FF(b, c, d, a, w[11], 22, 0x895cd7be);
FF(a, b, c, d, w[12], 7, 0x6b901122);
FF(d, a, b, c, w[13], 12, 0xfd987193);
FF(c, d, a, b, w[14], 17, 0xa679438e);
FF(b, c, d, a, w[15], 22, 0x49b40821);
GG(a, b, c, d, w[ 1], 5, 0xf61e2562);
GG(d, a, b, c, w[ 6], 9, 0xc040b340);
GG(c, d, a, b, w[11], 14, 0x265e5a51);
GG(b, c, d, a, w[ 0], 20, 0xe9b6c7aa);
GG(a, b, c, d, w[ 5], 5, 0xd62f105d);
GG(d, a, b, c, w[10], 9, 0x02441453);
GG(c, d, a, b, w[15], 14, 0xd8a1e681);
GG(b, c, d, a, w[ 4], 20, 0xe7d3fbc8);
GG(a, b, c, d, w[ 9], 5, 0x21e1cde6);
GG(d, a, b, c, w[14], 9, 0xc33707d6);
GG(c, d, a, b, w[ 3], 14, 0xf4d50d87);
GG(b, c, d, a, w[ 8], 20, 0x455a14ed);
GG(a, b, c, d, w[13], 5, 0xa9e3e905);
GG(d, a, b, c, w[ 2], 9, 0xfcefa3f8);
GG(c, d, a, b, w[ 7], 14, 0x676f02d9);
GG(b, c, d, a, w[12], 20, 0x8d2a4c8a);
HH(a, b, c, d, w[ 5], 4, 0xfffa3942);
HH(d, a, b, c, w[ 8], 11, 0x8771f681);
HH(c, d, a, b, w[11], 16, 0x6d9d6122);
HH(b, c, d, a, w[14], 23, 0xfde5380c);
HH(a, b, c, d, w[ 1], 4, 0xa4beea44);
HH(d, a, b, c, w[ 4], 11, 0x4bdecfa9);
HH(c, d, a, b, w[ 7], 16, 0xf6bb4b60);
HH(b, c, d, a, w[10], 23, 0xbebfbc70);
HH(a, b, c, d, w[13], 4, 0x289b7ec6);
HH(d, a, b, c, w[ 0], 11, 0xeaa127fa);
HH(c, d, a, b, w[ 3], 16, 0xd4ef3085);
HH(b, c, d, a, w[ 6], 23, 0x04881d05);
HH(a, b, c, d, w[ 9], 4, 0xd9d4d039);
HH(d, a, b, c, w[12], 11, 0xe6db99e5);
HH(c, d, a, b, w[15], 16, 0x1fa27cf8);
HH(b, c, d, a, w[ 2], 23, 0xc4ac5665);
II(a, b, c, d, w[ 0], 6, 0xf4292244);
II(d, a, b, c, w[ 7], 10, 0x432aff97);
II(c, d, a, b, w[14], 15, 0xab9423a7);
II(b, c, d, a, w[ 5], 21, 0xfc93a039);
II(a, b, c, d, w[12], 6, 0x655b59c3);
II(d, a, b, c, w[ 3], 10, 0x8f0ccc92);
II(c, d, a, b, w[10], 15, 0xffeff47d);
II(b, c, d, a, w[ 1], 21, 0x85845dd1);
II(a, b, c, d, w[ 8], 6, 0x6fa87e4f);
II(d, a, b, c, w[15], 10, 0xfe2ce6e0);
II(c, d, a, b, w[ 6], 15, 0xa3014314);
II(b, c, d, a, w[13], 21, 0x4e0811a1);
II(a, b, c, d, w[ 4], 6, 0xf7537e82);
II(d, a, b, c, w[11], 10, 0xbd3af235);
II(c, d, a, b, w[ 2], 15, 0x2ad7d2bb);
II(b, c, d, a, w[ 9], 21, 0xeb86d391);
p->h[0] += a;
p->h[1] += b;
p->h[2] += c;
p->h[3] += d;
}
/*@=boundsread@*/
#endif
/*@-boundswrite@*/
int md5Update(md5Param* p, const byte* data, int size)
{
register int proclength;
p->length += size;
while (size > 0)
{
proclength = ((p->offset + size) > 64) ? (64 - p->offset) : size;
memmove(((byte *) p->data) + p->offset, data, proclength);
size -= proclength;
data += proclength;
p->offset += proclength;
if (p->offset == 64)
{
md5Process(p);
p->offset = 0;
}
}
return 0;
}
/*@=boundswrite@*/
/** \ingroup HASH_md5_m
*/
/*@-boundswrite@*/
static void md5Finish(md5Param* p)
/*@modifies p @*/
{
register byte *ptr = ((byte *) p->data) + p->offset++;
*(ptr++) = 0x80;
if (p->offset > 56)
{
while (p->offset++ < 64)
*(ptr++) = 0;
md5Process(p);
p->offset = 0;
}
ptr = ((byte *) p->data) + p->offset;
while (p->offset++ < 56)
*(ptr++) = 0;
#if !WORDS_BIGENDIAN
p->data[14] = ((uint32)((p->length << 3) & 0xffffffff));
p->data[15] = ((uint32)(p->length >> 29));
#else
p->data[14] = swapu32((uint32)((p->length << 3) & 0xffffffff));
p->data[15] = swapu32((uint32)(p->length >> 29));
#endif
md5Process(p);
#if 1 /* WORDS_BIGENDIAN */
p->h[0] = swapu32(p->h[0]);
p->h[1] = swapu32(p->h[1]);
p->h[2] = swapu32(p->h[2]);
p->h[3] = swapu32(p->h[3]);
#endif
p->offset = 0;
}
/*@=boundswrite@*/
/*@-boundswrite@*/
int md5Digest(md5Param* p, uint32* data)
{
md5Finish(p);
mp32copy(4, data, p->h);
(void) md5Reset(p);
return 0;
}
/*@=boundswrite@*/
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