2
Copyright (C) 1999, 2000, 2002 Aladdin Enterprises. All rights reserved.
4
This software is provided 'as-is', without any express or implied
5
warranty. In no event will the authors be held liable for any damages
6
arising from the use of this software.
8
Permission is granted to anyone to use this software for any purpose,
9
including commercial applications, and to alter it and redistribute it
10
freely, subject to the following restrictions:
12
1. The origin of this software must not be misrepresented; you must not
13
claim that you wrote the original software. If you use this software
14
in a product, an acknowledgment in the product documentation would be
15
appreciated but is not required.
16
2. Altered source versions must be plainly marked as such, and must not be
17
misrepresented as being the original software.
18
3. This notice may not be removed or altered from any source distribution.
24
/* $Id: md5.c,v 1.6 2002/04/13 19:20:28 lpd Exp $ */
26
Independent implementation of MD5 (RFC 1321).
28
This code implements the MD5 Algorithm defined in RFC 1321, whose
30
http://www.ietf.org/rfc/rfc1321.txt
31
The code is derived from the text of the RFC, including the test suite
32
(section A.5) but excluding the rest of Appendix A. It does not include
33
any code or documentation that is identified in the RFC as being
36
The original and principal author of md5.c is L. Peter Deutsch
37
<ghost@aladdin.com>. Other authors are noted in the change history
38
that follows (in reverse chronological order):
40
2002-04-13 lpd Clarified derivation from RFC 1321; now handles byte order
41
either statically or dynamically; added missing #include <string.h>
43
2002-03-11 lpd Corrected argument list for main(), and added int return
44
type, in test program and T value program.
45
2002-02-21 lpd Added missing #include <stdio.h> in test program.
46
2000-07-03 lpd Patched to eliminate warnings about "constant is
47
unsigned in ANSI C, signed in traditional"; made test program
49
1999-11-04 lpd Edited comments slightly for automatic TOC extraction.
50
1999-10-18 lpd Fixed typo in header comment (ansi2knr rather than md5).
51
1999-05-03 lpd Original version.
57
#undef BYTE_ORDER /* 1 = big-endian, -1 = little-endian, 0 = unknown */
58
#ifdef ARCH_IS_BIG_ENDIAN
59
# define BYTE_ORDER (ARCH_IS_BIG_ENDIAN ? 1 : -1)
64
#define T_MASK ((md5_word_t)~0)
65
#define T1 /* 0xd76aa478 */ (T_MASK ^ 0x28955b87)
66
#define T2 /* 0xe8c7b756 */ (T_MASK ^ 0x173848a9)
68
#define T4 /* 0xc1bdceee */ (T_MASK ^ 0x3e423111)
69
#define T5 /* 0xf57c0faf */ (T_MASK ^ 0x0a83f050)
71
#define T7 /* 0xa8304613 */ (T_MASK ^ 0x57cfb9ec)
72
#define T8 /* 0xfd469501 */ (T_MASK ^ 0x02b96afe)
74
#define T10 /* 0x8b44f7af */ (T_MASK ^ 0x74bb0850)
75
#define T11 /* 0xffff5bb1 */ (T_MASK ^ 0x0000a44e)
76
#define T12 /* 0x895cd7be */ (T_MASK ^ 0x76a32841)
77
#define T13 0x6b901122
78
#define T14 /* 0xfd987193 */ (T_MASK ^ 0x02678e6c)
79
#define T15 /* 0xa679438e */ (T_MASK ^ 0x5986bc71)
80
#define T16 0x49b40821
81
#define T17 /* 0xf61e2562 */ (T_MASK ^ 0x09e1da9d)
82
#define T18 /* 0xc040b340 */ (T_MASK ^ 0x3fbf4cbf)
83
#define T19 0x265e5a51
84
#define T20 /* 0xe9b6c7aa */ (T_MASK ^ 0x16493855)
85
#define T21 /* 0xd62f105d */ (T_MASK ^ 0x29d0efa2)
86
#define T22 0x02441453
87
#define T23 /* 0xd8a1e681 */ (T_MASK ^ 0x275e197e)
88
#define T24 /* 0xe7d3fbc8 */ (T_MASK ^ 0x182c0437)
89
#define T25 0x21e1cde6
90
#define T26 /* 0xc33707d6 */ (T_MASK ^ 0x3cc8f829)
91
#define T27 /* 0xf4d50d87 */ (T_MASK ^ 0x0b2af278)
92
#define T28 0x455a14ed
93
#define T29 /* 0xa9e3e905 */ (T_MASK ^ 0x561c16fa)
94
#define T30 /* 0xfcefa3f8 */ (T_MASK ^ 0x03105c07)
95
#define T31 0x676f02d9
96
#define T32 /* 0x8d2a4c8a */ (T_MASK ^ 0x72d5b375)
97
#define T33 /* 0xfffa3942 */ (T_MASK ^ 0x0005c6bd)
98
#define T34 /* 0x8771f681 */ (T_MASK ^ 0x788e097e)
99
#define T35 0x6d9d6122
100
#define T36 /* 0xfde5380c */ (T_MASK ^ 0x021ac7f3)
101
#define T37 /* 0xa4beea44 */ (T_MASK ^ 0x5b4115bb)
102
#define T38 0x4bdecfa9
103
#define T39 /* 0xf6bb4b60 */ (T_MASK ^ 0x0944b49f)
104
#define T40 /* 0xbebfbc70 */ (T_MASK ^ 0x4140438f)
105
#define T41 0x289b7ec6
106
#define T42 /* 0xeaa127fa */ (T_MASK ^ 0x155ed805)
107
#define T43 /* 0xd4ef3085 */ (T_MASK ^ 0x2b10cf7a)
108
#define T44 0x04881d05
109
#define T45 /* 0xd9d4d039 */ (T_MASK ^ 0x262b2fc6)
110
#define T46 /* 0xe6db99e5 */ (T_MASK ^ 0x1924661a)
111
#define T47 0x1fa27cf8
112
#define T48 /* 0xc4ac5665 */ (T_MASK ^ 0x3b53a99a)
113
#define T49 /* 0xf4292244 */ (T_MASK ^ 0x0bd6ddbb)
114
#define T50 0x432aff97
115
#define T51 /* 0xab9423a7 */ (T_MASK ^ 0x546bdc58)
116
#define T52 /* 0xfc93a039 */ (T_MASK ^ 0x036c5fc6)
117
#define T53 0x655b59c3
118
#define T54 /* 0x8f0ccc92 */ (T_MASK ^ 0x70f3336d)
119
#define T55 /* 0xffeff47d */ (T_MASK ^ 0x00100b82)
120
#define T56 /* 0x85845dd1 */ (T_MASK ^ 0x7a7ba22e)
121
#define T57 0x6fa87e4f
122
#define T58 /* 0xfe2ce6e0 */ (T_MASK ^ 0x01d3191f)
123
#define T59 /* 0xa3014314 */ (T_MASK ^ 0x5cfebceb)
124
#define T60 0x4e0811a1
125
#define T61 /* 0xf7537e82 */ (T_MASK ^ 0x08ac817d)
126
#define T62 /* 0xbd3af235 */ (T_MASK ^ 0x42c50dca)
127
#define T63 0x2ad7d2bb
128
#define T64 /* 0xeb86d391 */ (T_MASK ^ 0x14792c6e)
132
md5_process(md5_state_t *pms, const md5_byte_t *data /*[64]*/)
135
a = pms->abcd[0], b = pms->abcd[1],
136
c = pms->abcd[2], d = pms->abcd[3];
139
/* Define storage only for big-endian CPUs. */
142
/* Define storage for little-endian or both types of CPUs. */
150
* Determine dynamically whether this is a big-endian or
151
* little-endian machine, since we can use a more efficient
152
* algorithm on the latter.
154
static const int w = 1;
156
if (*((const md5_byte_t *)&w)) /* dynamic little-endian */
158
#if BYTE_ORDER <= 0 /* little-endian */
161
* On little-endian machines, we can process properly aligned
162
* data without copying it.
164
if (!((data - (const md5_byte_t *)0) & 3)) {
165
/* data are properly aligned */
166
X = (const md5_word_t *)data;
169
memcpy(xbuf, data, 64);
175
else /* dynamic big-endian */
177
#if BYTE_ORDER >= 0 /* big-endian */
180
* On big-endian machines, we must arrange the bytes in the
183
const md5_byte_t *xp = data;
187
X = xbuf; /* (dynamic only) */
189
# define xbuf X /* (static only) */
191
for (i = 0; i < 16; ++i, xp += 4)
192
xbuf[i] = xp[0] + (xp[1] << 8) + (xp[2] << 16) + (xp[3] << 24);
197
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32 - (n))))
200
/* Let [abcd k s i] denote the operation
201
a = b + ((a + F(b,c,d) + X[k] + T[i]) <<< s). */
202
#define F(x, y, z) (((x) & (y)) | (~(x) & (z)))
203
#define SET(a, b, c, d, k, s, Ti)\
204
t = a + F(b,c,d) + X[k] + Ti;\
205
a = ROTATE_LEFT(t, s) + b
206
/* Do the following 16 operations. */
207
SET(a, b, c, d, 0, 7, T1);
208
SET(d, a, b, c, 1, 12, T2);
209
SET(c, d, a, b, 2, 17, T3);
210
SET(b, c, d, a, 3, 22, T4);
211
SET(a, b, c, d, 4, 7, T5);
212
SET(d, a, b, c, 5, 12, T6);
213
SET(c, d, a, b, 6, 17, T7);
214
SET(b, c, d, a, 7, 22, T8);
215
SET(a, b, c, d, 8, 7, T9);
216
SET(d, a, b, c, 9, 12, T10);
217
SET(c, d, a, b, 10, 17, T11);
218
SET(b, c, d, a, 11, 22, T12);
219
SET(a, b, c, d, 12, 7, T13);
220
SET(d, a, b, c, 13, 12, T14);
221
SET(c, d, a, b, 14, 17, T15);
222
SET(b, c, d, a, 15, 22, T16);
226
/* Let [abcd k s i] denote the operation
227
a = b + ((a + G(b,c,d) + X[k] + T[i]) <<< s). */
228
#define G(x, y, z) (((x) & (z)) | ((y) & ~(z)))
229
#define SET(a, b, c, d, k, s, Ti)\
230
t = a + G(b,c,d) + X[k] + Ti;\
231
a = ROTATE_LEFT(t, s) + b
232
/* Do the following 16 operations. */
233
SET(a, b, c, d, 1, 5, T17);
234
SET(d, a, b, c, 6, 9, T18);
235
SET(c, d, a, b, 11, 14, T19);
236
SET(b, c, d, a, 0, 20, T20);
237
SET(a, b, c, d, 5, 5, T21);
238
SET(d, a, b, c, 10, 9, T22);
239
SET(c, d, a, b, 15, 14, T23);
240
SET(b, c, d, a, 4, 20, T24);
241
SET(a, b, c, d, 9, 5, T25);
242
SET(d, a, b, c, 14, 9, T26);
243
SET(c, d, a, b, 3, 14, T27);
244
SET(b, c, d, a, 8, 20, T28);
245
SET(a, b, c, d, 13, 5, T29);
246
SET(d, a, b, c, 2, 9, T30);
247
SET(c, d, a, b, 7, 14, T31);
248
SET(b, c, d, a, 12, 20, T32);
252
/* Let [abcd k s t] denote the operation
253
a = b + ((a + H(b,c,d) + X[k] + T[i]) <<< s). */
254
#define H(x, y, z) ((x) ^ (y) ^ (z))
255
#define SET(a, b, c, d, k, s, Ti)\
256
t = a + H(b,c,d) + X[k] + Ti;\
257
a = ROTATE_LEFT(t, s) + b
258
/* Do the following 16 operations. */
259
SET(a, b, c, d, 5, 4, T33);
260
SET(d, a, b, c, 8, 11, T34);
261
SET(c, d, a, b, 11, 16, T35);
262
SET(b, c, d, a, 14, 23, T36);
263
SET(a, b, c, d, 1, 4, T37);
264
SET(d, a, b, c, 4, 11, T38);
265
SET(c, d, a, b, 7, 16, T39);
266
SET(b, c, d, a, 10, 23, T40);
267
SET(a, b, c, d, 13, 4, T41);
268
SET(d, a, b, c, 0, 11, T42);
269
SET(c, d, a, b, 3, 16, T43);
270
SET(b, c, d, a, 6, 23, T44);
271
SET(a, b, c, d, 9, 4, T45);
272
SET(d, a, b, c, 12, 11, T46);
273
SET(c, d, a, b, 15, 16, T47);
274
SET(b, c, d, a, 2, 23, T48);
278
/* Let [abcd k s t] denote the operation
279
a = b + ((a + I(b,c,d) + X[k] + T[i]) <<< s). */
280
#define I(x, y, z) ((y) ^ ((x) | ~(z)))
281
#define SET(a, b, c, d, k, s, Ti)\
282
t = a + I(b,c,d) + X[k] + Ti;\
283
a = ROTATE_LEFT(t, s) + b
284
/* Do the following 16 operations. */
285
SET(a, b, c, d, 0, 6, T49);
286
SET(d, a, b, c, 7, 10, T50);
287
SET(c, d, a, b, 14, 15, T51);
288
SET(b, c, d, a, 5, 21, T52);
289
SET(a, b, c, d, 12, 6, T53);
290
SET(d, a, b, c, 3, 10, T54);
291
SET(c, d, a, b, 10, 15, T55);
292
SET(b, c, d, a, 1, 21, T56);
293
SET(a, b, c, d, 8, 6, T57);
294
SET(d, a, b, c, 15, 10, T58);
295
SET(c, d, a, b, 6, 15, T59);
296
SET(b, c, d, a, 13, 21, T60);
297
SET(a, b, c, d, 4, 6, T61);
298
SET(d, a, b, c, 11, 10, T62);
299
SET(c, d, a, b, 2, 15, T63);
300
SET(b, c, d, a, 9, 21, T64);
303
/* Then perform the following additions. (That is increment each
304
of the four registers by the value it had before this block
313
md5_init(md5_state_t *pms)
315
pms->count[0] = pms->count[1] = 0;
316
pms->abcd[0] = 0x67452301;
317
pms->abcd[1] = /*0xefcdab89*/ T_MASK ^ 0x10325476;
318
pms->abcd[2] = /*0x98badcfe*/ T_MASK ^ 0x67452301;
319
pms->abcd[3] = 0x10325476;
323
md5_append(md5_state_t *pms, const md5_byte_t *data, int nbytes)
325
const md5_byte_t *p = data;
327
int offset = (pms->count[0] >> 3) & 63;
328
md5_word_t nbits = (md5_word_t)(nbytes << 3);
333
/* Update the message length. */
334
pms->count[1] += nbytes >> 29;
335
pms->count[0] += nbits;
336
if (pms->count[0] < nbits)
339
/* Process an initial partial block. */
341
int copy = (offset + nbytes > 64 ? 64 - offset : nbytes);
343
memcpy(pms->buf + offset, p, copy);
344
if (offset + copy < 64)
348
md5_process(pms, pms->buf);
351
/* Process full blocks. */
352
for (; left >= 64; p += 64, left -= 64)
355
/* Process a final partial block. */
357
memcpy(pms->buf, p, left);
361
md5_finish(md5_state_t *pms, md5_byte_t digest[16])
363
static const md5_byte_t pad[64] = {
364
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
365
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
366
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
367
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
372
/* Save the length before padding. */
373
for (i = 0; i < 8; ++i)
374
data[i] = (md5_byte_t)(pms->count[i >> 2] >> ((i & 3) << 3));
375
/* Pad to 56 bytes mod 64. */
376
md5_append(pms, pad, ((55 - (pms->count[0] >> 3)) & 63) + 1);
377
/* Append the length. */
378
md5_append(pms, data, 8);
379
for (i = 0; i < 16; ++i)
380
digest[i] = (md5_byte_t)(pms->abcd[i >> 2] >> ((i & 3) << 3));
added
removed
src/libLastFmTools/md5/md5.c
