File:
[DVB] /
dietlibc /
libcrypt /
md5.c
Revision
1.15:
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Tue Feb 26 15:40:18 2002 UTC (22 years, 3 months ago) by
fefe
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MAIN
CVS tags:
finnland_test_200301,
branch_rc14_fieldtest_finnland,
branch_rc13_fieldtest_finnland,
branch_rc12_fieldtest_finnland,
branch_rc10_fieldtest_finnland,
RELEASE_finnland_200301_1,
RC12_FIELDTEST_FINNLAND,
RC10_FIELDTEST_FINNLAND,
HEAD
more MD5 ARM optimizations from Andre
/*****************************************************************************
*
* "derived from the RSA Data Security, Inc. MD5 Message-Digest Algorithm".
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*****************************************************************************/
#include <endian.h>
#include <md5.h>
#include <string.h>
#if (__BYTE_ORDER == __BIG_ENDIAN)
/*
Block copy and convert byte order to little-endian.
dst must be 32bit aligned.
Length is the number of 32bit words
*/
static void CopyToLittleEndian (uint32_t *dst, const uint8_t *src, int length) {
while (length--) {
*dst=(((uint32_t)src[3])<<24) |
(((uint32_t)src[2])<<16) |
(((uint32_t)src[1])<< 8) |
(uint32_t)src[0];
src+=4;
dst++;
}
}
#endif
/*
Assembler versions of __MD5Transform, MD5Init and MD5Update
currently exist for x86 and little-endian ARM.
For other targets, we need to use the C versions below.
*/
#if !(defined (__i386__) || ((defined (__arm__) && (__BYTE_ORDER == __LITTLE_ENDIAN))))
/*
Initialise the MD5 context.
*/
void MD5Init (MD5_CTX* context) {
context->count[0] = 0;
context->count[1] = 0;
context->state[0] = 0x67452301; /* Load magic constants. */
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
#define ROTATE_LEFT(x, n) ((x << n) | (x >> (32-n)))
#define F(x, y, z) (z ^ (x & (y ^ z)))
#define G(x, y, z) (y ^ (z & (x ^ y)))
#define H(x, y, z) (x ^ y ^ z)
#define I(x, y, z) (y ^ (x | ~z))
#define FF(a, b, c, d, x, s, ac) { (a) += F (b, c, d) + (x) + (uint32_t)(ac); (a) = ROTATE_LEFT (a, s); (a) += (b); }
#define GG(a, b, c, d, x, s, ac) { (a) += G (b, c, d) + (x) + (uint32_t)(ac); (a) = ROTATE_LEFT (a, s); (a) += (b); }
#define HH(a, b, c, d, x, s, ac) { (a) += H (b, c, d) + (x) + (uint32_t)(ac); (a) = ROTATE_LEFT (a, s); (a) += (b); }
#define II(a, b, c, d, x, s, ac) { (a) += I (b, c, d) + (x) + (uint32_t)(ac); (a) = ROTATE_LEFT (a, s); (a) += (b); }
static void __MD5Transform (uint32_t state[4], const uint8_t *in, int repeat) {
const uint32_t *x;
uint32_t a = state[0];
uint32_t b = state[1];
uint32_t c = state[2];
uint32_t d = state[3];
for ( ; repeat; repeat--) {
uint32_t tempBuffer[16];
#if (__BYTE_ORDER == __BIG_ENDIAN)
CopyToLittleEndian (tempBuffer, in, 16);
x = tempBuffer;
#else
if ((long)in & 3) {
memcpy(tempBuffer, in, 64);
x = tempBuffer;
} else
x = (const uint32_t *) in;
#endif
FF (a, b, c, d, x[ 0], 7, 0xd76aa478); /* 1 */ /* Round 1 */
FF (d, a, b, c, x[ 1], 12, 0xe8c7b756); /* 2 */
FF (c, d, a, b, x[ 2], 17, 0x242070db); /* 3 */
FF (b, c, d, a, x[ 3], 22, 0xc1bdceee); /* 4 */
FF (a, b, c, d, x[ 4], 7, 0xf57c0faf); /* 5 */
FF (d, a, b, c, x[ 5], 12, 0x4787c62a); /* 6 */
FF (c, d, a, b, x[ 6], 17, 0xa8304613); /* 7 */
FF (b, c, d, a, x[ 7], 22, 0xfd469501); /* 8 */
FF (a, b, c, d, x[ 8], 7, 0x698098d8); /* 9 */
FF (d, a, b, c, x[ 9], 12, 0x8b44f7af); /* 10 */
FF (c, d, a, b, x[10], 17, 0xffff5bb1); /* 11 */
FF (b, c, d, a, x[11], 22, 0x895cd7be); /* 12 */
FF (a, b, c, d, x[12], 7, 0x6b901122); /* 13 */
FF (d, a, b, c, x[13], 12, 0xfd987193); /* 14 */
FF (c, d, a, b, x[14], 17, 0xa679438e); /* 15 */
FF (b, c, d, a, x[15], 22, 0x49b40821); /* 16 */
GG (a, b, c, d, x[ 1], 5, 0xf61e2562); /* 17 */ /* Round 2 */
GG (d, a, b, c, x[ 6], 9, 0xc040b340); /* 18 */
GG (c, d, a, b, x[11], 14, 0x265e5a51); /* 19 */
GG (b, c, d, a, x[ 0], 20, 0xe9b6c7aa); /* 20 */
GG (a, b, c, d, x[ 5], 5, 0xd62f105d); /* 21 */
GG (d, a, b, c, x[10], 9, 0x02441453); /* 22 */
GG (c, d, a, b, x[15], 14, 0xd8a1e681); /* 23 */
GG (b, c, d, a, x[ 4], 20, 0xe7d3fbc8); /* 24 */
GG (a, b, c, d, x[ 9], 5, 0x21e1cde6); /* 25 */
GG (d, a, b, c, x[14], 9, 0xc33707d6); /* 26 */
GG (c, d, a, b, x[ 3], 14, 0xf4d50d87); /* 27 */
GG (b, c, d, a, x[ 8], 20, 0x455a14ed); /* 28 */
GG (a, b, c, d, x[13], 5, 0xa9e3e905); /* 29 */
GG (d, a, b, c, x[ 2], 9, 0xfcefa3f8); /* 30 */
GG (c, d, a, b, x[ 7], 14, 0x676f02d9); /* 31 */
GG (b, c, d, a, x[12], 20, 0x8d2a4c8a); /* 32 */
HH (a, b, c, d, x[ 5], 4, 0xfffa3942); /* 33 */ /* Round 3 */
HH (d, a, b, c, x[ 8], 11, 0x8771f681); /* 34 */
HH (c, d, a, b, x[11], 16, 0x6d9d6122); /* 35 */
HH (b, c, d, a, x[14], 23, 0xfde5380c); /* 36 */
HH (a, b, c, d, x[ 1], 4, 0xa4beea44); /* 37 */
HH (d, a, b, c, x[ 4], 11, 0x4bdecfa9); /* 38 */
HH (c, d, a, b, x[ 7], 16, 0xf6bb4b60); /* 39 */
HH (b, c, d, a, x[10], 23, 0xbebfbc70); /* 40 */
HH (a, b, c, d, x[13], 4, 0x289b7ec6); /* 41 */
HH (d, a, b, c, x[ 0], 11, 0xeaa127fa); /* 42 */
HH (c, d, a, b, x[ 3], 16, 0xd4ef3085); /* 43 */
HH (b, c, d, a, x[ 6], 23, 0x04881d05); /* 44 */
HH (a, b, c, d, x[ 9], 4, 0xd9d4d039); /* 45 */
HH (d, a, b, c, x[12], 11, 0xe6db99e5); /* 46 */
HH (c, d, a, b, x[15], 16, 0x1fa27cf8); /* 47 */
HH (b, c, d, a, x[ 2], 23, 0xc4ac5665); /* 48 */
II (a, b, c, d, x[ 0], 6, 0xf4292244); /* 49 */ /* Round 4 */
II (d, a, b, c, x[ 7], 10, 0x432aff97); /* 50 */
II (c, d, a, b, x[14], 15, 0xab9423a7); /* 51 */
II (b, c, d, a, x[ 5], 21, 0xfc93a039); /* 52 */
II (a, b, c, d, x[12], 6, 0x655b59c3); /* 53 */
II (d, a, b, c, x[ 3], 10, 0x8f0ccc92); /* 54 */
II (c, d, a, b, x[10], 15, 0xffeff47d); /* 55 */
II (b, c, d, a, x[ 1], 21, 0x85845dd1); /* 56 */
II (a, b, c, d, x[ 8], 6, 0x6fa87e4f); /* 57 */
II (d, a, b, c, x[15], 10, 0xfe2ce6e0); /* 58 */
II (c, d, a, b, x[ 6], 15, 0xa3014314); /* 59 */
II (b, c, d, a, x[13], 21, 0x4e0811a1); /* 60 */
II (a, b, c, d, x[ 4], 6, 0xf7537e82); /* 61 */
II (d, a, b, c, x[11], 10, 0xbd3af235); /* 62 */
II (c, d, a, b, x[ 2], 15, 0x2ad7d2bb); /* 63 */
II (b, c, d, a, x[ 9], 21, 0xeb86d391); /* 64 */
state[0] = a = a + state[0];
state[1] = b = b + state[1];
state[2] = c = c + state[2];
state[3] = d = d + state[3];
in += 64;
}
}
/*
MD5 block update operation:
Process another sub-string of the message and update the context.
*/
void MD5Update (MD5_CTX *context, const uint8_t *input, size_t inputBytes) {
int i;
int byteIndex;
unsigned int partLen;
int len;
/* Compute number of bytes mod 64 */
byteIndex = (context->count[0] >> 3) & 0x3F;
/* Update number of bits: count += 8 * inputBytes */
if ((context->count[0] += inputBytes << 3) < (inputBytes << 3))
context->count[1]++;
context->count[1] += (inputBytes >> (32-3));
partLen = (64 - byteIndex);
/* Transform as many times as possible. */
if (inputBytes >= partLen) {
memcpy (context->buffer + byteIndex, input, partLen);
__MD5Transform (context->state, (const uint8_t *) context->buffer, 1);
len = (inputBytes - partLen) / 64;
__MD5Transform (context->state, &input[partLen], len);
i = partLen + 64 * len;
byteIndex = 0;
} else
i = 0;
/* Buffer remaining input */
memcpy (&context->buffer[byteIndex], &input[i], inputBytes - i);
}
#endif
void MD5Final (uint8_t digest[16], MD5_CTX* context) {
static uint8_t finalBlock[64];
uint32_t bits[2];
int byteIndex;
int finalBlockLength;
byteIndex = (context->count[0] >> 3) & 0x3F;
finalBlockLength = ((byteIndex < 56) ? 56 : 120) - byteIndex;
finalBlock[0] = 0x80;
#if (__BYTE_ORDER == __BIG_ENDIAN)
CopyToLittleEndian (bits, (const uint8_t *) context->count, 2);
#else
memcpy(bits, context->count, 8);
#endif
MD5Update (context, finalBlock, finalBlockLength);
MD5Update (context, (const uint8_t *) bits, 8);
#if (__BYTE_ORDER == __BIG_ENDIAN)
CopyToLittleEndian ((uint32_t *) digest, (const uint8_t *) context->state, 4);
#else
memcpy (digest, context->state, 16);
#endif
memset(context, 0, sizeof(*context));
}
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