Line data Source code
1 : // MD5.CC - source code for the C++/object oriented translation and
2 : // modification of MD5.
3 :
4 : // Translation and modification (c) 1995 by Mordechai T. Abzug
5 : // 2012-2014, Stefan Eilemann <eile@eyescale.ch>
6 :
7 : // This translation/ modification is provided "as is," without express or
8 : // implied warranty of any kind.
9 :
10 : // The translator/ modifier does not claim (1) that MD5 will do what you think
11 : // it does; (2) that this translation/ modification is accurate; or (3) that
12 : // this software is "merchantible." (Language for this disclaimer partially
13 : // copied from the disclaimer below).
14 :
15 : /* based on:
16 :
17 : MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
18 : MDDRIVER.C - test driver for MD2, MD4 and MD5
19 :
20 :
21 : Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
22 : rights reserved.
23 :
24 : License to copy and use this software is granted provided that it
25 : is identified as the "RSA Data Security, Inc. MD5 Message-Digest
26 : Algorithm" in all material mentioning or referencing this software
27 : or this function.
28 :
29 : License is also granted to make and use derivative works provided
30 : that such works are identified as "derived from the RSA Data
31 : Security, Inc. MD5 Message-Digest Algorithm" in all material
32 : mentioning or referencing the derived work.
33 :
34 : RSA Data Security, Inc. makes no representations concerning either
35 : the merchantability of this software or the suitability of this
36 : software for any particular purpose. It is provided "as is"
37 : without express or implied warranty of any kind.
38 :
39 : These notices must be retained in any copies of any part of this
40 : documentation and/or software.
41 :
42 : */
43 :
44 : #include "md5.hh"
45 : #include <lunchbox/debug.h>
46 :
47 : #include <assert.h>
48 : #include <string.h>
49 : #include <iostream>
50 :
51 :
52 :
53 :
54 : // MD5 simple initialization method
55 :
56 : // cppcheck-suppress uninitMemberVar
57 0 : MD5::MD5(){
58 :
59 0 : init();
60 :
61 0 : }
62 :
63 :
64 :
65 :
66 : // MD5 block update operation. Continues an MD5 message-digest
67 : // operation, processing another message block, and updating the
68 : // context.
69 :
70 9 : void MD5::update (uint1 *input, size_t input_length) {
71 :
72 : size_t input_index, buffer_index;
73 : size_t buffer_space; // how much space is left in buffer
74 :
75 9 : if (finalized){ // so we can't update!
76 0 : LBERROR << "MD5::update: Can't update a finalized digest!" << std::endl;
77 9 : return;
78 : }
79 :
80 : // Compute number of bytes mod 64
81 9 : buffer_index = (unsigned int)((count[0] >> 3) & 0x3F);
82 :
83 : // Update number of bits
84 9 : if ( (count[0] += ((uint4) input_length << 3))<((uint4) input_length << 3) )
85 0 : count[1]++;
86 :
87 9 : count[1] += ((uint4)input_length >> 29);
88 :
89 :
90 9 : buffer_space = 64 - buffer_index; // how much space is left in buffer
91 :
92 : // Transform as many times as possible.
93 9 : if (input_length >= buffer_space) { // ie. we have enough to fill the buffer
94 : // fill the rest of the buffer and transform
95 3 : memcpy (buffer + buffer_index, input, buffer_space);
96 3 : transform (buffer);
97 :
98 : // now, transform each 64-byte piece of the input, bypassing the buffer
99 3 : for (input_index = buffer_space; input_index + 63 < input_length;
100 : input_index += 64)
101 0 : transform (input+input_index);
102 :
103 3 : buffer_index = 0; // so we can buffer remaining
104 : }
105 : else
106 6 : input_index=0; // so we can buffer the whole input
107 :
108 :
109 : // and here we do the buffering:
110 9 : memcpy(buffer+buffer_index, input+input_index, input_length-input_index);
111 : }
112 :
113 :
114 :
115 : // MD5 update for files.
116 : // Like above, except that it works on files (and uses above as a primitive.)
117 :
118 0 : void MD5::update(FILE *file){
119 :
120 : unsigned char buf[1024];
121 : size_t len;
122 :
123 0 : while ( (len=fread(buf, 1, 1024, file)) )
124 0 : update(buf, len);
125 :
126 0 : fclose (file);
127 :
128 0 : }
129 :
130 :
131 :
132 :
133 :
134 :
135 : // MD5 update for std::istreams.
136 : // Like update for files; see above.
137 :
138 0 : void MD5::update(std::istream& stream){
139 :
140 0 : while (stream.good()){
141 : unsigned char buf[1024];
142 0 : stream.read((char*)buf, 1024); // note that return value of read is unusable.
143 0 : const int len=stream.gcount();
144 0 : update(buf, len);
145 : }
146 :
147 0 : }
148 :
149 :
150 :
151 :
152 :
153 :
154 : // MD5 update for std::ifstreams.
155 : // Like update for files; see above.
156 :
157 0 : void MD5::update(std::ifstream& stream){
158 :
159 0 : while (stream.good()){
160 : unsigned char buf[1024];
161 0 : stream.read((char*)buf, 1024); // note that return value of read is unusable.
162 0 : const int len=stream.gcount();
163 0 : update(buf, len);
164 : }
165 :
166 0 : }
167 :
168 :
169 :
170 :
171 :
172 :
173 : // MD5 finalization. Ends an MD5 message-digest operation, writing the
174 : // the message digest and zeroizing the context.
175 :
176 :
177 3 : void MD5::finalize (){
178 :
179 : unsigned char bits[8];
180 : unsigned int index, padLen;
181 : static uint1 PADDING[64]={
182 : 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
183 : 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
184 : 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
185 : };
186 :
187 3 : if (finalized){
188 0 : LBERROR << "MD5::finalize: Already finalized this digest!" << std::endl;
189 3 : return;
190 : }
191 :
192 : // Save number of bits
193 3 : encode (bits, count, 8);
194 :
195 : // Pad out to 56 mod 64.
196 3 : index = (uint4) ((count[0] >> 3) & 0x3f);
197 3 : padLen = (index < 56) ? (56 - index) : (120 - index);
198 3 : update (PADDING, padLen);
199 :
200 : // Append length (before padding)
201 3 : update (bits, 8);
202 :
203 : // Store state in digest
204 3 : encode (digest, state, 16);
205 :
206 : // Zeroize sensitive information
207 3 : memset (buffer, 0, sizeof(*buffer));
208 :
209 3 : finalized=1;
210 :
211 : }
212 :
213 :
214 3 : MD5::MD5(unsigned char* string){
215 :
216 3 : init(); // must be called be all constructors
217 3 : update(string, strlen( (const char*)string ));
218 3 : finalize ();
219 3 : }
220 :
221 :
222 :
223 0 : MD5::MD5(FILE *file){
224 :
225 0 : init(); // must be called be all constructors
226 0 : update(file);
227 0 : finalize ();
228 0 : }
229 :
230 :
231 :
232 :
233 0 : MD5::MD5(std::istream& stream){
234 :
235 0 : init(); // must called by all constructors
236 0 : update (stream);
237 0 : finalize();
238 0 : }
239 :
240 :
241 :
242 0 : MD5::MD5(std::ifstream& stream){
243 :
244 0 : init(); // must called by all constructors
245 0 : update (stream);
246 0 : finalize();
247 0 : }
248 :
249 :
250 :
251 0 : unsigned char *MD5::raw_digest(){
252 :
253 0 : if (!finalized){
254 0 : LBERROR << "MD5::raw_digest: Can't get digest if you haven't "<<
255 0 : "finalized the digest!" <<std::endl;
256 0 : return ( (unsigned char*) "");
257 : }
258 :
259 0 : uint1 *s = new uint1[16];
260 0 : memcpy(s, digest, 16);
261 0 : return s;
262 : }
263 :
264 3 : void MD5::raw_digest( uint64_t& high, uint64_t& low) const
265 : {
266 6 : high = (uint64_t( digest[7] )<<0) | (uint64_t( digest[6] )<<8) |
267 9 : (uint64_t( digest[5] )<<16) | (uint64_t( digest[4] )<<24) |
268 9 : (uint64_t( digest[3] )<<32) | (uint64_t( digest[2] )<<40) |
269 6 : (uint64_t( digest[1] )<<48) | (uint64_t( digest[0] )<<56);
270 6 : low = (uint64_t( digest[15] )<<0) | (uint64_t( digest[14] )<<8) |
271 9 : (uint64_t( digest[13] )<<16) | (uint64_t( digest[12] )<<24) |
272 9 : (uint64_t( digest[11] )<<32) | (uint64_t( digest[10] )<<40) |
273 6 : (uint64_t( digest[9] )<<48) | (uint64_t( digest[8] )<<56);
274 3 : }
275 :
276 :
277 0 : const char *MD5::hex_digest(){
278 :
279 0 : if (!finalized){
280 0 : LBERROR << "MD5::hex_digest: Can't get digest if you haven't "<<
281 0 : "finalized the digest!" <<std::endl;
282 0 : return "";
283 : }
284 :
285 0 : char *s= new char[33];
286 0 : for (int i=0; i<16; i++)
287 0 : sprintf(s+i*2, "%02x", digest[i]);
288 :
289 0 : s[32]='\0';
290 :
291 0 : return s;
292 : }
293 :
294 :
295 :
296 :
297 :
298 0 : std::ostream& operator<<(std::ostream &stream, MD5 context){
299 :
300 0 : stream << context.hex_digest();
301 0 : return stream;
302 : }
303 :
304 :
305 :
306 :
307 : // PRIVATE METHODS:
308 :
309 :
310 :
311 3 : void MD5::init(){
312 3 : finalized=0; // we just started!
313 :
314 : // Nothing counted, so count=0
315 3 : count[0] = 0;
316 3 : count[1] = 0;
317 :
318 : // Load magic initialization constants.
319 3 : state[0] = 0x67452301;
320 3 : state[1] = 0xefcdab89;
321 3 : state[2] = 0x98badcfe;
322 3 : state[3] = 0x10325476;
323 3 : }
324 :
325 :
326 :
327 : // Constants for MD5Transform routine.
328 : // Although we could use C++ style constants, defines are actually better,
329 : // since they let us easily evade scope clashes.
330 :
331 : #define S11 7
332 : #define S12 12
333 : #define S13 17
334 : #define S14 22
335 : #define S21 5
336 : #define S22 9
337 : #define S23 14
338 : #define S24 20
339 : #define S31 4
340 : #define S32 11
341 : #define S33 16
342 : #define S34 23
343 : #define S41 6
344 : #define S42 10
345 : #define S43 15
346 : #define S44 21
347 :
348 :
349 :
350 :
351 : // MD5 basic transformation. Transforms state based on block.
352 3 : void MD5::transform (uint1 block[64]){
353 :
354 3 : uint4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
355 :
356 3 : decode (x, block, 64);
357 :
358 3 : assert(!finalized); // not just a user error, since the method is private
359 :
360 : /* Round 1 */
361 3 : FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
362 3 : FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
363 3 : FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
364 3 : FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
365 3 : FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
366 3 : FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
367 3 : FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
368 3 : FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
369 3 : FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
370 3 : FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
371 3 : FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
372 3 : FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
373 3 : FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
374 3 : FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
375 3 : FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
376 3 : FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
377 :
378 : /* Round 2 */
379 3 : GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
380 3 : GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
381 3 : GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
382 3 : GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
383 3 : GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
384 3 : GG (d, a, b, c, x[10], S22, 0x2441453); /* 22 */
385 3 : GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
386 3 : GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
387 3 : GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
388 3 : GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
389 3 : GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
390 3 : GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
391 3 : GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
392 3 : GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
393 3 : GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
394 3 : GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
395 :
396 : /* Round 3 */
397 3 : HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
398 3 : HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
399 3 : HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
400 3 : HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
401 3 : HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
402 3 : HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
403 3 : HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
404 3 : HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
405 3 : HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
406 3 : HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
407 3 : HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
408 3 : HH (b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */
409 3 : HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
410 3 : HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
411 3 : HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
412 3 : HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
413 :
414 : /* Round 4 */
415 3 : II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
416 3 : II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
417 3 : II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
418 3 : II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
419 3 : II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
420 3 : II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
421 3 : II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
422 3 : II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
423 3 : II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
424 3 : II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
425 3 : II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
426 3 : II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
427 3 : II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
428 3 : II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
429 3 : II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
430 3 : II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
431 :
432 3 : state[0] += a;
433 3 : state[1] += b;
434 3 : state[2] += c;
435 3 : state[3] += d;
436 :
437 : // Zeroize sensitive information.
438 3 : memset ( (uint1 *) x, 0, sizeof(x));
439 :
440 3 : }
441 :
442 :
443 :
444 : // Encodes input (UINT4) into output (unsigned char). Assumes len is
445 : // a multiple of 4.
446 6 : void MD5::encode (uint1 *output, uint4 *input, size_t len) {
447 :
448 : unsigned int i, j;
449 :
450 24 : for (i = 0, j = 0; j < len; i++, j += 4) {
451 18 : output[j] = (uint1) (input[i] & 0xff);
452 18 : output[j+1] = (uint1) ((input[i] >> 8) & 0xff);
453 18 : output[j+2] = (uint1) ((input[i] >> 16) & 0xff);
454 18 : output[j+3] = (uint1) ((input[i] >> 24) & 0xff);
455 : }
456 6 : }
457 :
458 :
459 :
460 :
461 : // Decodes input (unsigned char) into output (UINT4). Assumes len is
462 : // a multiple of 4.
463 3 : void MD5::decode (uint4 *output, uint1 *input, size_t len){
464 :
465 : unsigned int i, j;
466 :
467 51 : for (i = 0, j = 0; j < len; i++, j += 4)
468 96 : output[i] = ((uint4)input[j]) | (((uint4)input[j+1]) << 8) |
469 96 : (((uint4)input[j+2]) << 16) | (((uint4)input[j+3]) << 24);
470 3 : }
471 :
472 :
473 :
474 :
475 :
476 : // Note: Replace "for loop" with standard memcpy if possible.
477 12 : void MD5::memcpy (uint1 *output, uint1 *input, size_t len){
478 :
479 : unsigned int i;
480 :
481 204 : for (i = 0; i < len; i++)
482 192 : output[i] = input[i];
483 12 : }
484 :
485 :
486 :
487 : // Note: Replace "for loop" with standard memset if possible.
488 6 : void MD5::memset (uint1 *output, uint1 value, size_t len){
489 :
490 : unsigned int i;
491 :
492 201 : for (i = 0; i < len; i++)
493 195 : output[i] = value;
494 6 : }
495 :
496 :
497 :
498 : // ROTATE_LEFT rotates x left n bits.
499 :
500 192 : inline unsigned int MD5::rotate_left (uint4 x, uint4 n){
501 192 : return (x << n) | (x >> (32-n)) ;
502 : }
503 :
504 :
505 :
506 :
507 : // F, G, H and I are basic MD5 functions.
508 :
509 48 : inline unsigned int MD5::F (uint4 x, uint4 y, uint4 z){
510 48 : return (x & y) | (~x & z);
511 : }
512 :
513 48 : inline unsigned int MD5::G (uint4 x, uint4 y, uint4 z){
514 48 : return (x & z) | (y & ~z);
515 : }
516 :
517 48 : inline unsigned int MD5::H (uint4 x, uint4 y, uint4 z){
518 48 : return x ^ y ^ z;
519 : }
520 :
521 48 : inline unsigned int MD5::I (uint4 x, uint4 y, uint4 z){
522 48 : return y ^ (x | ~z);
523 : }
524 :
525 :
526 :
527 : // FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
528 : // Rotation is separate from addition to prevent recomputation.
529 :
530 :
531 48 : inline void MD5::FF(uint4& a, uint4 b, uint4 c, uint4 d, uint4 x,
532 : uint4 s, uint4 ac){
533 48 : a += F(b, c, d) + x + ac;
534 48 : a = rotate_left (a, s) +b;
535 48 : }
536 :
537 48 : inline void MD5::GG(uint4& a, uint4 b, uint4 c, uint4 d, uint4 x,
538 : uint4 s, uint4 ac){
539 48 : a += G(b, c, d) + x + ac;
540 48 : a = rotate_left (a, s) +b;
541 48 : }
542 :
543 48 : inline void MD5::HH(uint4& a, uint4 b, uint4 c, uint4 d, uint4 x,
544 : uint4 s, uint4 ac){
545 48 : a += H(b, c, d) + x + ac;
546 48 : a = rotate_left (a, s) +b;
547 48 : }
548 :
549 48 : inline void MD5::II(uint4& a, uint4 b, uint4 c, uint4 d, uint4 x,
550 : uint4 s, uint4 ac){
551 48 : a += I(b, c, d) + x + ac;
552 48 : a = rotate_left (a, s) +b;
553 138 : }
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