diff options
| author | Tim Redfern <tim@eclectronics.org> | 2014-02-17 13:36:38 +0000 |
|---|---|---|
| committer | Tim Redfern <tim@eclectronics.org> | 2014-02-17 13:36:38 +0000 |
| commit | 22e28216336da876e1fd17f380ce42eaf1446769 (patch) | |
| tree | 444dad3dc7e2656992d29f34f7bce31970c122a5 /ffmpeg/libavutil/md5.c | |
| parent | ae5e8541f6e06e64c28719467cdf366ac57aff31 (diff) | |
chasing indexing error
Diffstat (limited to 'ffmpeg/libavutil/md5.c')
| -rw-r--r-- | ffmpeg/libavutil/md5.c | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/ffmpeg/libavutil/md5.c b/ffmpeg/libavutil/md5.c deleted file mode 100644 index 63fc37d..0000000 --- a/ffmpeg/libavutil/md5.c +++ /dev/null @@ -1,235 +0,0 @@ -/* - * 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 |
