2 * Copyright (C) 2006 Michael Niedermayer (michaelni@gmx.at)
3 * Copyright (C) 2003-2005 by Christopher R. Hertel (crh@ubiqx.mn.org)
4 * #inlcude LGPL license
7 * IETF RFC 1321: The MD5 Message-Digest Algorithm
8 * Ron Rivest. IETF, April, 1992
10 * based on http://ubiqx.org/libcifs/source/Auth/MD5.c
11 * from Christopher R. Hertel (crh@ubiqx.mn.org)
12 * simplified, cleaned and IMO redundant comments removed by michael
14 * if you use gcc, then version 4.1 or later and -fomit-frame-pointer is
15 * strongly recommanded
29 const int av_md5_size= sizeof(AVMD5);
31 static const uint8_t S[4][4] = {
32 { 7, 12, 17, 22 }, /* Round 1 */
33 { 5, 9, 14, 20 }, /* Round 2 */
34 { 4, 11, 16, 23 }, /* Round 3 */
35 { 6, 10, 15, 21 } /* Round 4 */
38 static const uint32_t T[64] = {
39 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, /* Round 1 */
40 0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
41 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
42 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
44 0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa, /* Round 2 */
45 0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8,
46 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
47 0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
49 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c, /* Round 3 */
50 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
51 0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05,
52 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
54 0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039, /* Round 4 */
55 0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
56 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
57 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391,
60 #define CORE(i, a, b, c, d) \
65 case 0: a += (d ^ b&(c^d)) + X[ i &15 ]; break;\
66 case 1: a += (c ^ d&(c^b)) + X[ (1+5*i)&15 ]; break;\
67 case 2: a += (b^c^d) + X[ (5+3*i)&15 ]; break;\
68 case 3: a += (c^(b|~d)) + X[ ( 7*i)&15 ]; break;\
70 a = b + (( a << t ) | ( a >> (32 - t) ));
72 static void body(uint32_t ABCD[4], const uint32_t X[16]){
74 unsigned int a= ABCD[3];
75 unsigned int b= ABCD[2];
76 unsigned int c= ABCD[1];
77 unsigned int d= ABCD[0];
79 #ifdef WORDS_BIGENDIAN
85 for( i = 0; i < 64; i++ ){
87 t=d; d=c; c=b; b=a; a=t;
90 #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)
91 #define CORE4(i) CORE2(i) CORE2((i+4)) CORE2((i+8)) CORE2((i+12))
92 CORE4(0) CORE4(16) CORE4(32) CORE4(48)
101 void av_md5_init(AVMD5 *ctx){
105 ctx->ABCD[0] = 0x10325476;
106 ctx->ABCD[1] = 0x98badcfe;
107 ctx->ABCD[2] = 0xefcdab89;
108 ctx->ABCD[3] = 0x67452301;
111 void av_md5_update(AVMD5 *ctx, const uint8_t *src, const int len){
116 for( i = 0; i < len; i++ ){
117 ctx->block[ ctx->b_used++ ] = src[i];
118 if( 64 == ctx->b_used ){
119 body(ctx->ABCD, (const uint32_t*) ctx->block);
125 void av_md5_final(AVMD5 *ctx, uint8_t *dst){
128 ctx->block[ctx->b_used++] = 0x80;
130 memset(&ctx->block[ctx->b_used], 0, 64 - ctx->b_used);
132 if( 56 < ctx->b_used ){
133 body( ctx->ABCD, (const uint32_t*) ctx->block );
134 memset(ctx->block, 0, 64);
138 ctx->block[56+i] = (ctx->len << 3) >> (i<<3);
140 body(ctx->ABCD, (const uint32_t*) ctx->block);
143 ((uint32_t*)dst)[i]= le2me_32(ctx->ABCD[3-i]);
146 void av_md5_sum(uint8_t *dst, const uint8_t *src, const int len){
150 av_md5_update(ctx, src, len);
151 av_md5_final(ctx, dst);
161 for(i=0; i<1000; i++) in[i]= i*i;
162 av_md5_sum( (uint8_t*)&md5val, in, 1000); printf("%lld\n", md5val);
163 av_md5_sum( (uint8_t*)&md5val, in, 63); printf("%lld\n", md5val);
164 av_md5_sum( (uint8_t*)&md5val, in, 64); printf("%lld\n", md5val);
165 av_md5_sum( (uint8_t*)&md5val, in, 65); printf("%lld\n", md5val);
166 for(i=0; i<1000; i++) in[i]= i % 127;
167 av_md5_sum( (uint8_t*)&md5val, in, 999); printf("%lld\n", md5val);