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/*
* sha1.c
*
* SHA-1 hash function, code
*
* For more information on this algorithm, see:
* NIST FIPS PUB 180-1
*
* Copyright (c) 1997, 1998, 1999, 2000, 2001 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
*
*/
#define BEECRYPT_DLL_EXPORT
#include "sha1.h"
#include "mp32.h"
#include "endianness.h"
static const uint32 k[4] = { 0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6 };
static const uint32 hinit[5] = { 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0 };
const hashFunction sha1 = { "SHA-1", sizeof(sha1Param), 64, 5 * sizeof(uint32), (hashFunctionReset) sha1Reset, (hashFunctionUpdate) sha1Update, (hashFunctionDigest) sha1Digest };
int sha1Reset(register sha1Param *p)
{
mp32copy(5, p->h, hinit);
mp32zero(80, p->data);
p->length = 0;
p->offset = 0;
return 0;
}
#define SUBROUND1(a, b, c, d, e, w, k) \
e = ROTL32(a, 5) + ((b&(c^d))^d) + e + w + k; \
b = ROTR32(b, 2)
#define SUBROUND2(a, b, c, d, e, w, k) \
e = ROTL32(a, 5) + (b^c^d) + e + w + k; \
b = ROTR32(b, 2)
#define SUBROUND3(a, b, c, d, e, w, k) \
e = ROTL32(a, 5) + (((b|c)&d)|(b&c)) + e + w + k; \
b = ROTR32(b, 2)
#define SUBROUND4(a, b, c, d, e, w, k) \
e = ROTL32(a, 5) + (b^c^d) + e + w + k; \
b = ROTR32(b, 2)
#ifndef ASM_SHA1PROCESS
void sha1Process(register sha1Param *p)
{
register uint32 a, b, c, d, e;
register uint32 *w;
register byte t;
#if WORDS_BIGENDIAN
w = p->data + 16;
#else
w = p->data;
t = 16;
while (t--)
{
register uint32 temp = swapu32(*w);
*(w++) = temp;
}
#endif
t = 64;
while (t--)
{
register uint32 temp = w[-3] ^ w[-8] ^ w[-14] ^ w[-16];
*(w++) = ROTL32(temp, 1);
}
w = p->data;
a = p->h[0]; b = p->h[1]; c = p->h[2]; d = p->h[3]; e = p->h[4];
SUBROUND1(a,b,c,d,e,w[ 0],k[0]);
SUBROUND1(e,a,b,c,d,w[ 1],k[0]);
SUBROUND1(d,e,a,b,c,w[ 2],k[0]);
SUBROUND1(c,d,e,a,b,w[ 3],k[0]);
SUBROUND1(b,c,d,e,a,w[ 4],k[0]);
SUBROUND1(a,b,c,d,e,w[ 5],k[0]);
SUBROUND1(e,a,b,c,d,w[ 6],k[0]);
SUBROUND1(d,e,a,b,c,w[ 7],k[0]);
SUBROUND1(c,d,e,a,b,w[ 8],k[0]);
SUBROUND1(b,c,d,e,a,w[ 9],k[0]);
SUBROUND1(a,b,c,d,e,w[10],k[0]);
SUBROUND1(e,a,b,c,d,w[11],k[0]);
SUBROUND1(d,e,a,b,c,w[12],k[0]);
SUBROUND1(c,d,e,a,b,w[13],k[0]);
SUBROUND1(b,c,d,e,a,w[14],k[0]);
SUBROUND1(a,b,c,d,e,w[15],k[0]);
SUBROUND1(e,a,b,c,d,w[16],k[0]);
SUBROUND1(d,e,a,b,c,w[17],k[0]);
SUBROUND1(c,d,e,a,b,w[18],k[0]);
SUBROUND1(b,c,d,e,a,w[19],k[0]);
SUBROUND2(a,b,c,d,e,w[20],k[1]);
SUBROUND2(e,a,b,c,d,w[21],k[1]);
SUBROUND2(d,e,a,b,c,w[22],k[1]);
SUBROUND2(c,d,e,a,b,w[23],k[1]);
SUBROUND2(b,c,d,e,a,w[24],k[1]);
SUBROUND2(a,b,c,d,e,w[25],k[1]);
SUBROUND2(e,a,b,c,d,w[26],k[1]);
SUBROUND2(d,e,a,b,c,w[27],k[1]);
SUBROUND2(c,d,e,a,b,w[28],k[1]);
SUBROUND2(b,c,d,e,a,w[29],k[1]);
SUBROUND2(a,b,c,d,e,w[30],k[1]);
SUBROUND2(e,a,b,c,d,w[31],k[1]);
SUBROUND2(d,e,a,b,c,w[32],k[1]);
SUBROUND2(c,d,e,a,b,w[33],k[1]);
SUBROUND2(b,c,d,e,a,w[34],k[1]);
SUBROUND2(a,b,c,d,e,w[35],k[1]);
SUBROUND2(e,a,b,c,d,w[36],k[1]);
SUBROUND2(d,e,a,b,c,w[37],k[1]);
SUBROUND2(c,d,e,a,b,w[38],k[1]);
SUBROUND2(b,c,d,e,a,w[39],k[1]);
SUBROUND3(a,b,c,d,e,w[40],k[2]);
SUBROUND3(e,a,b,c,d,w[41],k[2]);
SUBROUND3(d,e,a,b,c,w[42],k[2]);
SUBROUND3(c,d,e,a,b,w[43],k[2]);
SUBROUND3(b,c,d,e,a,w[44],k[2]);
SUBROUND3(a,b,c,d,e,w[45],k[2]);
SUBROUND3(e,a,b,c,d,w[46],k[2]);
SUBROUND3(d,e,a,b,c,w[47],k[2]);
SUBROUND3(c,d,e,a,b,w[48],k[2]);
SUBROUND3(b,c,d,e,a,w[49],k[2]);
SUBROUND3(a,b,c,d,e,w[50],k[2]);
SUBROUND3(e,a,b,c,d,w[51],k[2]);
SUBROUND3(d,e,a,b,c,w[52],k[2]);
SUBROUND3(c,d,e,a,b,w[53],k[2]);
SUBROUND3(b,c,d,e,a,w[54],k[2]);
SUBROUND3(a,b,c,d,e,w[55],k[2]);
SUBROUND3(e,a,b,c,d,w[56],k[2]);
SUBROUND3(d,e,a,b,c,w[57],k[2]);
SUBROUND3(c,d,e,a,b,w[58],k[2]);
SUBROUND3(b,c,d,e,a,w[59],k[2]);
SUBROUND4(a,b,c,d,e,w[60],k[3]);
SUBROUND4(e,a,b,c,d,w[61],k[3]);
SUBROUND4(d,e,a,b,c,w[62],k[3]);
SUBROUND4(c,d,e,a,b,w[63],k[3]);
SUBROUND4(b,c,d,e,a,w[64],k[3]);
SUBROUND4(a,b,c,d,e,w[65],k[3]);
SUBROUND4(e,a,b,c,d,w[66],k[3]);
SUBROUND4(d,e,a,b,c,w[67],k[3]);
SUBROUND4(c,d,e,a,b,w[68],k[3]);
SUBROUND4(b,c,d,e,a,w[69],k[3]);
SUBROUND4(a,b,c,d,e,w[70],k[3]);
SUBROUND4(e,a,b,c,d,w[71],k[3]);
SUBROUND4(d,e,a,b,c,w[72],k[3]);
SUBROUND4(c,d,e,a,b,w[73],k[3]);
SUBROUND4(b,c,d,e,a,w[74],k[3]);
SUBROUND4(a,b,c,d,e,w[75],k[3]);
SUBROUND4(e,a,b,c,d,w[76],k[3]);
SUBROUND4(d,e,a,b,c,w[77],k[3]);
SUBROUND4(c,d,e,a,b,w[78],k[3]);
SUBROUND4(b,c,d,e,a,w[79],k[3]);
p->h[0] += a;
p->h[1] += b;
p->h[2] += c;
p->h[3] += d;
p->h[4] += e;
}
#endif
int sha1Update(register sha1Param *p, const byte *data, int size)
{
register int proclength;
p->length += size;
while (size > 0)
{
proclength = ((p->offset + size) > 64) ? (64 - p->offset) : size;
memcpy(((byte *) p->data) + p->offset, data, proclength);
size -= proclength;
data += proclength;
p->offset += proclength;
if (p->offset == 64)
{
sha1Process(p);
p->offset = 0;
}
}
return 0;
}
static void sha1Finish(register sha1Param *p)
{
register byte *ptr = ((byte *) p->data) + p->offset++;
*(ptr++) = 0x80;
if (p->offset > 56)
{
while (p->offset++ < 64)
*(ptr++) = 0;
sha1Process(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 >> 29));
p->data[15] = ((uint32)((p->length << 3) & 0xffffffff));
#else
p->data[14] = swapu32((uint32)(p->length >> 29));
p->data[15] = swapu32((uint32)((p->length << 3) & 0xffffffff));
#endif
sha1Process(p);
p->offset = 0;
}
int sha1Digest(register sha1Param *p, uint32 *data)
{
sha1Finish(p);
mp32copy(5, data, p->h);
sha1Reset(p);
return 0;
}
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