191 lines
6.3 KiB
C
191 lines
6.3 KiB
C
/**
|
|
* @file md2.c
|
|
* @version $Format:%h%d$
|
|
*
|
|
* MD2 hash implementation.
|
|
*/
|
|
/*
|
|
* Copyright (c) 2013-2017 Rambus Inc.
|
|
* Copyright (c) PeerSec Networks, 2002-2011
|
|
* All Rights Reserved
|
|
*
|
|
* The latest version of this code is available at http://www.matrixssl.org
|
|
*
|
|
* This software is open source; 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.
|
|
*
|
|
* This General Public License does NOT permit incorporating this software
|
|
* into proprietary programs. If you are unable to comply with the GPL, a
|
|
* commercial license for this software may be purchased from Rambus at
|
|
* http://www.rambus.com/
|
|
*
|
|
* This program is distributed in 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
|
|
* http://www.gnu.org/copyleft/gpl.html
|
|
*/
|
|
/******************************************************************************/
|
|
|
|
#include "../cryptoImpl.h"
|
|
|
|
#ifdef USE_MATRIX_MD2
|
|
/******************************************************************************/
|
|
|
|
static const unsigned char PI_SUBST[256] = {
|
|
41, 46, 67, 201, 162, 216, 124, 1, 61, 54, 84, 161, 236, 240, 6,
|
|
19, 98, 167, 5, 243, 192, 199, 115, 140, 152, 147, 43, 217, 188,
|
|
76, 130, 202, 30, 155, 87, 60, 253, 212, 224, 22, 103, 66, 111, 24,
|
|
138, 23, 229, 18, 190, 78, 196, 214, 218, 158, 222, 73, 160, 251,
|
|
245, 142, 187, 47, 238, 122, 169, 104, 121, 145, 21, 178, 7, 63,
|
|
148, 194, 16, 137, 11, 34, 95, 33, 128, 127, 93, 154, 90, 144, 50,
|
|
39, 53, 62, 204, 231, 191, 247, 151, 3, 255, 25, 48, 179, 72, 165,
|
|
181, 209, 215, 94, 146, 42, 172, 86, 170, 198, 79, 184, 56, 210,
|
|
150, 164, 125, 182, 118, 252, 107, 226, 156, 116, 4, 241, 69, 157,
|
|
112, 89, 100, 113, 135, 32, 134, 91, 207, 101, 230, 45, 168, 2, 27,
|
|
96, 37, 173, 174, 176, 185, 246, 28, 70, 97, 105, 52, 64, 126, 15,
|
|
85, 71, 163, 35, 221, 81, 175, 58, 195, 92, 249, 206, 186, 197,
|
|
234, 38, 44, 83, 13, 110, 133, 40, 132, 9, 211, 223, 205, 244, 65,
|
|
129, 77, 82, 106, 220, 55, 200, 108, 193, 171, 250, 36, 225, 123,
|
|
8, 12, 189, 177, 74, 120, 136, 149, 139, 227, 99, 232, 109, 233,
|
|
203, 213, 254, 59, 0, 29, 57, 242, 239, 183, 14, 102, 88, 208, 228,
|
|
166, 119, 114, 248, 235, 117, 75, 10, 49, 68, 80, 180, 143, 237,
|
|
31, 26, 219, 153, 141, 51, 159, 17, 131, 20
|
|
};
|
|
|
|
/* adds 16 bytes to the checksum */
|
|
static void md2_update_chksum(psMd2_t *md)
|
|
{
|
|
int32 j;
|
|
unsigned char L;
|
|
|
|
L = md->chksum[15];
|
|
for (j = 0; j < 16; j++)
|
|
{
|
|
|
|
/*
|
|
caution, the RFC says its "C[j] = S[M[i*16+j] xor L]" but the reference
|
|
source code [and test vectors] say otherwise.
|
|
*/
|
|
L = (md->chksum[j] ^= PI_SUBST[(int32) (md->buf[j] ^ L)] & 255);
|
|
}
|
|
}
|
|
|
|
static void md2_compress(psMd2_t *md)
|
|
{
|
|
int32 j, k;
|
|
unsigned char t;
|
|
|
|
/* copy block */
|
|
for (j = 0; j < 16; j++)
|
|
{
|
|
md->X[16 + j] = md->buf[j];
|
|
md->X[32 + j] = md->X[j] ^ md->X[16 + j];
|
|
}
|
|
|
|
t = (unsigned char) 0;
|
|
|
|
/* do 18 rounds */
|
|
for (j = 0; j < 18; j++)
|
|
{
|
|
for (k = 0; k < 48; k++)
|
|
{
|
|
t = (md->X[k] ^= PI_SUBST[(int32) (t & 255)]);
|
|
}
|
|
t = (t + (unsigned char) j) & 255;
|
|
}
|
|
}
|
|
|
|
void psMd2Init(psMd2_t *md)
|
|
{
|
|
# ifdef CRYPTO_ASSERT
|
|
psAssert(md != NULL);
|
|
# endif
|
|
|
|
/* MD2 uses a zero'ed state... */
|
|
Memset(md->X, 0x0, sizeof(md->X));
|
|
Memset(md->chksum, 0x0, sizeof(md->chksum));
|
|
Memset(md->buf, 0x0, sizeof(md->buf));
|
|
md->curlen = 0;
|
|
}
|
|
|
|
int32_t psMd2Update(psMd2_t *md, const unsigned char *buf, uint32_t len)
|
|
{
|
|
uint32_t n;
|
|
|
|
# ifdef CRYPTO_ASSERT
|
|
psAssert(md != NULL);
|
|
psAssert(buf != NULL);
|
|
if (md->curlen > sizeof(md->buf))
|
|
{
|
|
psTraceCrypto("psMd2Update error\n");
|
|
return PS_LIMIT_FAIL;
|
|
}
|
|
# endif
|
|
while (len > 0)
|
|
{
|
|
n = min(len, (16 - md->curlen));
|
|
Memcpy(md->buf + md->curlen, buf, (size_t) n);
|
|
md->curlen += n;
|
|
buf += n;
|
|
len -= n;
|
|
|
|
/* is 16 bytes full? */
|
|
if (md->curlen == 16)
|
|
{
|
|
md2_compress(md);
|
|
md2_update_chksum(md);
|
|
md->curlen = 0;
|
|
}
|
|
}
|
|
return PS_SUCCESS;
|
|
}
|
|
|
|
int32_t psMd2Final(psMd2_t *md, unsigned char *hash)
|
|
{
|
|
uint32 i, k;
|
|
|
|
# ifdef CRYPTO_ASSERT
|
|
psAssert(md != NULL);
|
|
psAssert(hash != NULL);
|
|
# endif
|
|
|
|
if (md->curlen >= sizeof(md->buf))
|
|
{
|
|
psTraceCrypto("psMd2Final error\n");
|
|
return PS_LIMIT_FAIL;
|
|
}
|
|
|
|
|
|
/* pad the message */
|
|
k = 16 - md->curlen;
|
|
for (i = md->curlen; i < 16; i++)
|
|
{
|
|
md->buf[i] = (unsigned char) k;
|
|
}
|
|
|
|
/* hash and update */
|
|
md2_compress(md);
|
|
md2_update_chksum(md);
|
|
|
|
/* hash checksum */
|
|
Memcpy(md->buf, md->chksum, 16);
|
|
md2_compress(md);
|
|
|
|
/* output is lower 16 bytes of X */
|
|
Memcpy(hash, md->X, 16);
|
|
|
|
Memset(md, 0x0, sizeof(psMd2_t));
|
|
return PS_SUCCESS;
|
|
}
|
|
|
|
#endif /* USE_MATRIX_MD2 */
|
|
|
|
/******************************************************************************/
|
|
|