236 lines
6.7 KiB
C
236 lines
6.7 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2006 Michael Niedermayer (michaelni@gmx.at)
|
||
|
|
* Copyright (C) 2003-2005 by Christopher R. Hertel (crh@ubiqx.mn.org)
|
||
|
|
*
|
||
|
|
* References:
|
||
|
|
* IETF RFC 1321: The MD5 Message-Digest Algorithm
|
||
|
|
* Ron Rivest. IETF, April, 1992
|
||
|
|
*
|
||
|
|
* based on http://ubiqx.org/libcifs/source/Auth/MD5.c
|
||
|
|
* from Christopher R. Hertel (crh@ubiqx.mn.org)
|
||
|
|
* Simplified, cleaned and IMO redundant comments removed by michael.
|
||
|
|
*
|
||
|
|
* If you use gcc, then version 4.1 or later and -fomit-frame-pointer is
|
||
|
|
* strongly recommended.
|
||
|
|
*
|
||
|
|
* This file is part of FFmpeg.
|
||
|
|
*
|
||
|
|
* FFmpeg 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.
|
||
|
|
*
|
||
|
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
#include "bswap.h"
|
||
|
|
#include "intreadwrite.h"
|
||
|
|
#include "md5.h"
|
||
|
|
#include "mem.h"
|
||
|
|
|
||
|
|
typedef struct AVMD5{
|
||
|
|
uint64_t len;
|
||
|
|
uint8_t block[64];
|
||
|
|
uint32_t ABCD[4];
|
||
|
|
} AVMD5;
|
||
|
|
|
||
|
|
const int av_md5_size = sizeof(AVMD5);
|
||
|
|
|
||
|
|
struct AVMD5 *av_md5_alloc(void)
|
||
|
|
{
|
||
|
|
return av_mallocz(sizeof(struct AVMD5));
|
||
|
|
}
|
||
|
|
|
||
|
|
static const uint8_t S[4][4] = {
|
||
|
|
{ 7, 12, 17, 22 }, /* round 1 */
|
||
|
|
{ 5, 9, 14, 20 }, /* round 2 */
|
||
|
|
{ 4, 11, 16, 23 }, /* round 3 */
|
||
|
|
{ 6, 10, 15, 21 } /* round 4 */
|
||
|
|
};
|
||
|
|
|
||
|
|
static const uint32_t T[64] = { // T[i]= fabs(sin(i+1)<<32)
|
||
|
|
0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, /* round 1 */
|
||
|
|
0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
|
||
|
|
0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
|
||
|
|
0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
|
||
|
|
|
||
|
|
0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa, /* round 2 */
|
||
|
|
0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8,
|
||
|
|
0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
|
||
|
|
0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
|
||
|
|
|
||
|
|
0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c, /* round 3 */
|
||
|
|
0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
|
||
|
|
0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05,
|
||
|
|
0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
|
||
|
|
|
||
|
|
0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039, /* round 4 */
|
||
|
|
0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
|
||
|
|
0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
|
||
|
|
0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391,
|
||
|
|
};
|
||
|
|
|
||
|
|
#define CORE(i, a, b, c, d) do { \
|
||
|
|
t = S[i >> 4][i & 3]; \
|
||
|
|
a += T[i]; \
|
||
|
|
\
|
||
|
|
if (i < 32) { \
|
||
|
|
if (i < 16) a += (d ^ (b & (c ^ d))) + X[ i & 15]; \
|
||
|
|
else a += ((d & b) | (~d & c)) + X[(1 + 5*i) & 15]; \
|
||
|
|
} else { \
|
||
|
|
if (i < 48) a += (b ^ c ^ d) + X[(5 + 3*i) & 15]; \
|
||
|
|
else a += (c ^ (b | ~d)) + X[( 7*i) & 15]; \
|
||
|
|
} \
|
||
|
|
a = b + (a << t | a >> (32 - t)); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
static void body(uint32_t ABCD[4], uint32_t *src, int nblocks)
|
||
|
|
{
|
||
|
|
int i av_unused;
|
||
|
|
int n;
|
||
|
|
uint32_t a, b, c, d, t, *X;
|
||
|
|
|
||
|
|
for (n = 0; n < nblocks; n++) {
|
||
|
|
a = ABCD[3];
|
||
|
|
b = ABCD[2];
|
||
|
|
c = ABCD[1];
|
||
|
|
d = ABCD[0];
|
||
|
|
|
||
|
|
X = src + n * 16;
|
||
|
|
|
||
|
|
#if HAVE_BIGENDIAN
|
||
|
|
for (i = 0; i < 16; i++)
|
||
|
|
X[i] = av_bswap32(X[i]);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if CONFIG_SMALL
|
||
|
|
for (i = 0; i < 64; i++) {
|
||
|
|
CORE(i, a, b, c, d);
|
||
|
|
t = d;
|
||
|
|
d = c;
|
||
|
|
c = b;
|
||
|
|
b = a;
|
||
|
|
a = t;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
#define CORE2(i) \
|
||
|
|
CORE( i, a,b,c,d); CORE((i+1),d,a,b,c); \
|
||
|
|
CORE((i+2),c,d,a,b); CORE((i+3),b,c,d,a)
|
||
|
|
#define CORE4(i) CORE2(i); CORE2((i+4)); CORE2((i+8)); CORE2((i+12))
|
||
|
|
CORE4(0); CORE4(16); CORE4(32); CORE4(48);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
ABCD[0] += d;
|
||
|
|
ABCD[1] += c;
|
||
|
|
ABCD[2] += b;
|
||
|
|
ABCD[3] += a;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void av_md5_init(AVMD5 *ctx)
|
||
|
|
{
|
||
|
|
ctx->len = 0;
|
||
|
|
|
||
|
|
ctx->ABCD[0] = 0x10325476;
|
||
|
|
ctx->ABCD[1] = 0x98badcfe;
|
||
|
|
ctx->ABCD[2] = 0xefcdab89;
|
||
|
|
ctx->ABCD[3] = 0x67452301;
|
||
|
|
}
|
||
|
|
|
||
|
|
void av_md5_update(AVMD5 *ctx, const uint8_t *src, int len)
|
||
|
|
{
|
||
|
|
const uint8_t *end;
|
||
|
|
int j;
|
||
|
|
|
||
|
|
j = ctx->len & 63;
|
||
|
|
ctx->len += len;
|
||
|
|
|
||
|
|
if (j) {
|
||
|
|
int cnt = FFMIN(len, 64 - j);
|
||
|
|
memcpy(ctx->block + j, src, cnt);
|
||
|
|
src += cnt;
|
||
|
|
len -= cnt;
|
||
|
|
if (j + cnt < 64)
|
||
|
|
return;
|
||
|
|
body(ctx->ABCD, (uint32_t *)ctx->block, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
end = src + (len & ~63);
|
||
|
|
if (HAVE_BIGENDIAN || (!HAVE_FAST_UNALIGNED && ((intptr_t)src & 3))) {
|
||
|
|
while (src < end) {
|
||
|
|
memcpy(ctx->block, src, 64);
|
||
|
|
body(ctx->ABCD, (uint32_t *) ctx->block, 1);
|
||
|
|
src += 64;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
int nblocks = len / 64;
|
||
|
|
body(ctx->ABCD, (uint32_t *)src, nblocks);
|
||
|
|
src = end;
|
||
|
|
}
|
||
|
|
len &= 63;
|
||
|
|
if (len > 0)
|
||
|
|
memcpy(ctx->block, src, len);
|
||
|
|
}
|
||
|
|
|
||
|
|
void av_md5_final(AVMD5 *ctx, uint8_t *dst)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
uint64_t finalcount = av_le2ne64(ctx->len << 3);
|
||
|
|
|
||
|
|
av_md5_update(ctx, "\200", 1);
|
||
|
|
while ((ctx->len & 63) != 56)
|
||
|
|
av_md5_update(ctx, "", 1);
|
||
|
|
|
||
|
|
av_md5_update(ctx, (uint8_t *)&finalcount, 8);
|
||
|
|
|
||
|
|
for (i = 0; i < 4; i++)
|
||
|
|
AV_WL32(dst + 4*i, ctx->ABCD[3 - i]);
|
||
|
|
}
|
||
|
|
|
||
|
|
void av_md5_sum(uint8_t *dst, const uint8_t *src, const int len)
|
||
|
|
{
|
||
|
|
AVMD5 ctx;
|
||
|
|
|
||
|
|
av_md5_init(&ctx);
|
||
|
|
av_md5_update(&ctx, src, len);
|
||
|
|
av_md5_final(&ctx, dst);
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef TEST
|
||
|
|
#include <stdio.h>
|
||
|
|
|
||
|
|
static void print_md5(uint8_t *md5)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
for (i = 0; i < 16; i++)
|
||
|
|
printf("%02x", md5[i]);
|
||
|
|
printf("\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(void){
|
||
|
|
uint8_t md5val[16];
|
||
|
|
int i;
|
||
|
|
uint8_t in[1000];
|
||
|
|
|
||
|
|
for (i = 0; i < 1000; i++)
|
||
|
|
in[i] = i * i;
|
||
|
|
av_md5_sum(md5val, in, 1000); print_md5(md5val);
|
||
|
|
av_md5_sum(md5val, in, 63); print_md5(md5val);
|
||
|
|
av_md5_sum(md5val, in, 64); print_md5(md5val);
|
||
|
|
av_md5_sum(md5val, in, 65); print_md5(md5val);
|
||
|
|
for (i = 0; i < 1000; i++)
|
||
|
|
in[i] = i % 127;
|
||
|
|
av_md5_sum(md5val, in, 999); print_md5(md5val);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#endif
|