diff options
author | Dave Chapman <dave@dchapman.com> | 2009-05-09 01:04:20 +0000 |
---|---|---|
committer | Dave Chapman <dave@dchapman.com> | 2009-05-09 01:04:20 +0000 |
commit | 69db01e72f2de91d35703919bfc9d0700df83e85 (patch) | |
tree | 18a8d01dc3df13c5dc51b813d7ce70e6bec79704 /apps/codecs/libcook/libavutil/md5.c | |
parent | 681a774472eded71f7a82fbfa4c3591f3f98d209 (diff) | |
download | rockbox-69db01e72f2de91d35703919bfc9d0700df83e85.tar.gz rockbox-69db01e72f2de91d35703919bfc9d0700df83e85.zip |
Initial commit of the minimal set of ffmpeg (r18079) files required for Cook (realaudio) decoding. These are the unmodified versions from ffmpeg, committed as a base for future changes.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20882 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/codecs/libcook/libavutil/md5.c')
-rw-r--r-- | apps/codecs/libcook/libavutil/md5.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/apps/codecs/libcook/libavutil/md5.c b/apps/codecs/libcook/libavutil/md5.c new file mode 100644 index 0000000000..26d1fb3874 --- /dev/null +++ b/apps/codecs/libcook/libavutil/md5.c | |||
@@ -0,0 +1,182 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2006 Michael Niedermayer (michaelni@gmx.at) | ||
3 | * Copyright (C) 2003-2005 by Christopher R. Hertel (crh@ubiqx.mn.org) | ||
4 | * | ||
5 | * References: | ||
6 | * IETF RFC 1321: The MD5 Message-Digest Algorithm | ||
7 | * Ron Rivest. IETF, April, 1992 | ||
8 | * | ||
9 | * based on http://ubiqx.org/libcifs/source/Auth/MD5.c | ||
10 | * from Christopher R. Hertel (crh@ubiqx.mn.org) | ||
11 | * Simplified, cleaned and IMO redundant comments removed by michael. | ||
12 | * | ||
13 | * If you use gcc, then version 4.1 or later and -fomit-frame-pointer is | ||
14 | * strongly recommended. | ||
15 | * | ||
16 | * This file is part of FFmpeg. | ||
17 | * | ||
18 | * FFmpeg is free software; you can redistribute it and/or | ||
19 | * modify it under the terms of the GNU Lesser General Public | ||
20 | * License as published by the Free Software Foundation; either | ||
21 | * version 2.1 of the License, or (at your option) any later version. | ||
22 | * | ||
23 | * FFmpeg is distributed in the hope that it will be useful, | ||
24 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
25 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
26 | * Lesser General Public License for more details. | ||
27 | * | ||
28 | * You should have received a copy of the GNU Lesser General Public | ||
29 | * License along with FFmpeg; if not, write to the Free Software | ||
30 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
31 | */ | ||
32 | |||
33 | #include <string.h> | ||
34 | #include "bswap.h" | ||
35 | #include "md5.h" | ||
36 | |||
37 | typedef struct AVMD5{ | ||
38 | uint64_t len; | ||
39 | uint8_t block[64]; | ||
40 | uint32_t ABCD[4]; | ||
41 | } AVMD5; | ||
42 | |||
43 | const int av_md5_size= sizeof(AVMD5); | ||
44 | |||
45 | static const uint8_t S[4][4] = { | ||
46 | { 7, 12, 17, 22 }, /* round 1 */ | ||
47 | { 5, 9, 14, 20 }, /* round 2 */ | ||
48 | { 4, 11, 16, 23 }, /* round 3 */ | ||
49 | { 6, 10, 15, 21 } /* round 4 */ | ||
50 | }; | ||
51 | |||
52 | static const uint32_t T[64] = { // T[i]= fabs(sin(i+1)<<32) | ||
53 | 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, /* round 1 */ | ||
54 | 0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501, | ||
55 | 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be, | ||
56 | 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821, | ||
57 | |||
58 | 0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa, /* round 2 */ | ||
59 | 0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8, | ||
60 | 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed, | ||
61 | 0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a, | ||
62 | |||
63 | 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c, /* round 3 */ | ||
64 | 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70, | ||
65 | 0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05, | ||
66 | 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665, | ||
67 | |||
68 | 0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039, /* round 4 */ | ||
69 | 0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1, | ||
70 | 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1, | ||
71 | 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391, | ||
72 | }; | ||
73 | |||
74 | #define CORE(i, a, b, c, d) \ | ||
75 | t = S[i>>4][i&3];\ | ||
76 | a += T[i];\ | ||
77 | \ | ||
78 | if(i<32){\ | ||
79 | if(i<16) a += (d ^ (b&(c^d))) + X[ i &15 ];\ | ||
80 | else a += (c ^ (d&(c^b))) + X[ (1+5*i)&15 ];\ | ||
81 | }else{\ | ||
82 | if(i<48) a += (b^c^d) + X[ (5+3*i)&15 ];\ | ||
83 | else a += (c^(b|~d)) + X[ ( 7*i)&15 ];\ | ||
84 | }\ | ||
85 | a = b + (( a << t ) | ( a >> (32 - t) )); | ||
86 | |||
87 | static void body(uint32_t ABCD[4], uint32_t X[16]){ | ||
88 | |||
89 | int t; | ||
90 | int i av_unused; | ||
91 | unsigned int a= ABCD[3]; | ||
92 | unsigned int b= ABCD[2]; | ||
93 | unsigned int c= ABCD[1]; | ||
94 | unsigned int d= ABCD[0]; | ||
95 | |||
96 | #ifdef WORDS_BIGENDIAN | ||
97 | for(i=0; i<16; i++) | ||
98 | X[i]= bswap_32(X[i]); | ||
99 | #endif | ||
100 | |||
101 | #if CONFIG_SMALL | ||
102 | for( i = 0; i < 64; i++ ){ | ||
103 | CORE(i,a,b,c,d) | ||
104 | t=d; d=c; c=b; b=a; a=t; | ||
105 | } | ||
106 | #else | ||
107 | #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) | ||
108 | #define CORE4(i) CORE2(i) CORE2((i+4)) CORE2((i+8)) CORE2((i+12)) | ||
109 | CORE4(0) CORE4(16) CORE4(32) CORE4(48) | ||
110 | #endif | ||
111 | |||
112 | ABCD[0] += d; | ||
113 | ABCD[1] += c; | ||
114 | ABCD[2] += b; | ||
115 | ABCD[3] += a; | ||
116 | } | ||
117 | |||
118 | void av_md5_init(AVMD5 *ctx){ | ||
119 | ctx->len = 0; | ||
120 | |||
121 | ctx->ABCD[0] = 0x10325476; | ||
122 | ctx->ABCD[1] = 0x98badcfe; | ||
123 | ctx->ABCD[2] = 0xefcdab89; | ||
124 | ctx->ABCD[3] = 0x67452301; | ||
125 | } | ||
126 | |||
127 | void av_md5_update(AVMD5 *ctx, const uint8_t *src, const int len){ | ||
128 | int i, j; | ||
129 | |||
130 | j= ctx->len & 63; | ||
131 | ctx->len += len; | ||
132 | |||
133 | for( i = 0; i < len; i++ ){ | ||
134 | ctx->block[j++] = src[i]; | ||
135 | if( 64 == j ){ | ||
136 | body(ctx->ABCD, (uint32_t*) ctx->block); | ||
137 | j = 0; | ||
138 | } | ||
139 | } | ||
140 | } | ||
141 | |||
142 | void av_md5_final(AVMD5 *ctx, uint8_t *dst){ | ||
143 | int i; | ||
144 | uint64_t finalcount= le2me_64(ctx->len<<3); | ||
145 | |||
146 | av_md5_update(ctx, "\200", 1); | ||
147 | while((ctx->len & 63)!=56) | ||
148 | av_md5_update(ctx, "", 1); | ||
149 | |||
150 | av_md5_update(ctx, (uint8_t*)&finalcount, 8); | ||
151 | |||
152 | for(i=0; i<4; i++) | ||
153 | ((uint32_t*)dst)[i]= le2me_32(ctx->ABCD[3-i]); | ||
154 | } | ||
155 | |||
156 | void av_md5_sum(uint8_t *dst, const uint8_t *src, const int len){ | ||
157 | AVMD5 ctx[1]; | ||
158 | |||
159 | av_md5_init(ctx); | ||
160 | av_md5_update(ctx, src, len); | ||
161 | av_md5_final(ctx, dst); | ||
162 | } | ||
163 | |||
164 | #ifdef TEST | ||
165 | #include <stdio.h> | ||
166 | #undef printf | ||
167 | int main(void){ | ||
168 | uint64_t md5val; | ||
169 | int i; | ||
170 | uint8_t in[1000]; | ||
171 | |||
172 | for(i=0; i<1000; i++) in[i]= i*i; | ||
173 | av_md5_sum( (uint8_t*)&md5val, in, 1000); printf("%"PRId64"\n", md5val); | ||
174 | av_md5_sum( (uint8_t*)&md5val, in, 63); printf("%"PRId64"\n", md5val); | ||
175 | av_md5_sum( (uint8_t*)&md5val, in, 64); printf("%"PRId64"\n", md5val); | ||
176 | av_md5_sum( (uint8_t*)&md5val, in, 65); printf("%"PRId64"\n", md5val); | ||
177 | for(i=0; i<1000; i++) in[i]= i % 127; | ||
178 | av_md5_sum( (uint8_t*)&md5val, in, 999); printf("%"PRId64"\n", md5val); | ||
179 | |||
180 | return 0; | ||
181 | } | ||
182 | #endif | ||