1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.haxx.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22
23 #include "curl_setup.h"
24
25 #ifndef CURL_DISABLE_CRYPTO_AUTH
26
27 #include <curl/curl.h>
28
29 #include "curl_md5.h"
30 #include "curl_hmac.h"
31 #include "warnless.h"
32
33 #if defined(USE_GNUTLS_NETTLE)
34
35 #include <nettle/md5.h>
36 #include "curl_memory.h"
37 /* The last #include file should be: */
38 #include "memdebug.h"
39
40 typedef struct md5_ctx MD5_CTX;
41
MD5_Init(MD5_CTX * ctx)42 static void MD5_Init(MD5_CTX * ctx)
43 {
44 md5_init(ctx);
45 }
46
MD5_Update(MD5_CTX * ctx,const unsigned char * input,unsigned int inputLen)47 static void MD5_Update(MD5_CTX * ctx,
48 const unsigned char *input,
49 unsigned int inputLen)
50 {
51 md5_update(ctx, inputLen, input);
52 }
53
MD5_Final(unsigned char digest[16],MD5_CTX * ctx)54 static void MD5_Final(unsigned char digest[16], MD5_CTX * ctx)
55 {
56 md5_digest(ctx, 16, digest);
57 }
58
59 #elif defined(USE_GNUTLS)
60
61 #include <gcrypt.h>
62 #include "curl_memory.h"
63 /* The last #include file should be: */
64 #include "memdebug.h"
65
66 typedef gcry_md_hd_t MD5_CTX;
67
MD5_Init(MD5_CTX * ctx)68 static void MD5_Init(MD5_CTX * ctx)
69 {
70 gcry_md_open(ctx, GCRY_MD_MD5, 0);
71 }
72
MD5_Update(MD5_CTX * ctx,const unsigned char * input,unsigned int inputLen)73 static void MD5_Update(MD5_CTX * ctx,
74 const unsigned char *input,
75 unsigned int inputLen)
76 {
77 gcry_md_write(*ctx, input, inputLen);
78 }
79
MD5_Final(unsigned char digest[16],MD5_CTX * ctx)80 static void MD5_Final(unsigned char digest[16], MD5_CTX * ctx)
81 {
82 memcpy(digest, gcry_md_read(*ctx, 0), 16);
83 gcry_md_close(*ctx);
84 }
85
86 #elif defined(USE_OPENSSL) && !defined(USE_AMISSL)
87 /* When OpenSSL is available we use the MD5-function from OpenSSL */
88 #include <openssl/md5.h>
89 #include "curl_memory.h"
90 /* The last #include file should be: */
91 #include "memdebug.h"
92
93 #elif (defined(__MAC_OS_X_VERSION_MAX_ALLOWED) && \
94 (__MAC_OS_X_VERSION_MAX_ALLOWED >= 1040)) || \
95 (defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && \
96 (__IPHONE_OS_VERSION_MAX_ALLOWED >= 20000))
97
98 /* For Apple operating systems: CommonCrypto has the functions we need.
99 These functions are available on Tiger and later, as well as iOS 2.0
100 and later. If you're building for an older cat, well, sorry.
101
102 Declaring the functions as static like this seems to be a bit more
103 reliable than defining COMMON_DIGEST_FOR_OPENSSL on older cats. */
104 # include <CommonCrypto/CommonDigest.h>
105 # define MD5_CTX CC_MD5_CTX
106 #include "curl_memory.h"
107 /* The last #include file should be: */
108 #include "memdebug.h"
109
MD5_Init(MD5_CTX * ctx)110 static void MD5_Init(MD5_CTX *ctx)
111 {
112 CC_MD5_Init(ctx);
113 }
114
MD5_Update(MD5_CTX * ctx,const unsigned char * input,unsigned int inputLen)115 static void MD5_Update(MD5_CTX *ctx,
116 const unsigned char *input,
117 unsigned int inputLen)
118 {
119 CC_MD5_Update(ctx, input, inputLen);
120 }
121
MD5_Final(unsigned char digest[16],MD5_CTX * ctx)122 static void MD5_Final(unsigned char digest[16], MD5_CTX *ctx)
123 {
124 CC_MD5_Final(digest, ctx);
125 }
126
127 #elif defined(_WIN32) && !defined(CURL_WINDOWS_APP)
128
129 #include <wincrypt.h>
130 #include "curl_memory.h"
131 /* The last #include file should be: */
132 #include "memdebug.h"
133
134 typedef struct {
135 HCRYPTPROV hCryptProv;
136 HCRYPTHASH hHash;
137 } MD5_CTX;
138
MD5_Init(MD5_CTX * ctx)139 static void MD5_Init(MD5_CTX *ctx)
140 {
141 if(CryptAcquireContext(&ctx->hCryptProv, NULL, NULL,
142 PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) {
143 CryptCreateHash(ctx->hCryptProv, CALG_MD5, 0, 0, &ctx->hHash);
144 }
145 }
146
MD5_Update(MD5_CTX * ctx,const unsigned char * input,unsigned int inputLen)147 static void MD5_Update(MD5_CTX *ctx,
148 const unsigned char *input,
149 unsigned int inputLen)
150 {
151 CryptHashData(ctx->hHash, (unsigned char *)input, inputLen, 0);
152 }
153
MD5_Final(unsigned char digest[16],MD5_CTX * ctx)154 static void MD5_Final(unsigned char digest[16], MD5_CTX *ctx)
155 {
156 unsigned long length = 0;
157 CryptGetHashParam(ctx->hHash, HP_HASHVAL, NULL, &length, 0);
158 if(length == 16)
159 CryptGetHashParam(ctx->hHash, HP_HASHVAL, digest, &length, 0);
160 if(ctx->hHash)
161 CryptDestroyHash(ctx->hHash);
162 if(ctx->hCryptProv)
163 CryptReleaseContext(ctx->hCryptProv, 0);
164 }
165
166 #else
167 /* When no other crypto library is available we use this code segment */
168 /*
169 * This is an OpenSSL-compatible implementation of the RSA Data Security, Inc.
170 * MD5 Message-Digest Algorithm (RFC 1321).
171 *
172 * Homepage:
173 https://openwall.info/wiki/people/solar/software/public-domain-source-code/md5
174 *
175 * Author:
176 * Alexander Peslyak, better known as Solar Designer <solar at openwall.com>
177 *
178 * This software was written by Alexander Peslyak in 2001. No copyright is
179 * claimed, and the software is hereby placed in the public domain.
180 * In case this attempt to disclaim copyright and place the software in the
181 * public domain is deemed null and void, then the software is
182 * Copyright (c) 2001 Alexander Peslyak and it is hereby released to the
183 * general public under the following terms:
184 *
185 * Redistribution and use in source and binary forms, with or without
186 * modification, are permitted.
187 *
188 * There's ABSOLUTELY NO WARRANTY, express or implied.
189 *
190 * (This is a heavily cut-down "BSD license".)
191 *
192 * This differs from Colin Plumb's older public domain implementation in that
193 * no exactly 32-bit integer data type is required (any 32-bit or wider
194 * unsigned integer data type will do), there's no compile-time endianness
195 * configuration, and the function prototypes match OpenSSL's. No code from
196 * Colin Plumb's implementation has been reused; this comment merely compares
197 * the properties of the two independent implementations.
198 *
199 * The primary goals of this implementation are portability and ease of use.
200 * It is meant to be fast, but not as fast as possible. Some known
201 * optimizations are not included to reduce source code size and avoid
202 * compile-time configuration.
203 */
204
205 #include <string.h>
206
207 /* The last #include files should be: */
208 #include "curl_memory.h"
209 #include "memdebug.h"
210
211 /* Any 32-bit or wider unsigned integer data type will do */
212 typedef unsigned int MD5_u32plus;
213
214 typedef struct {
215 MD5_u32plus lo, hi;
216 MD5_u32plus a, b, c, d;
217 unsigned char buffer[64];
218 MD5_u32plus block[16];
219 } MD5_CTX;
220
221 static void MD5_Init(MD5_CTX *ctx);
222 static void MD5_Update(MD5_CTX *ctx, const void *data, unsigned long size);
223 static void MD5_Final(unsigned char *result, MD5_CTX *ctx);
224
225 /*
226 * The basic MD5 functions.
227 *
228 * F and G are optimized compared to their RFC 1321 definitions for
229 * architectures that lack an AND-NOT instruction, just like in Colin Plumb's
230 * implementation.
231 */
232 #define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
233 #define G(x, y, z) ((y) ^ ((z) & ((x) ^ (y))))
234 #define H(x, y, z) (((x) ^ (y)) ^ (z))
235 #define H2(x, y, z) ((x) ^ ((y) ^ (z)))
236 #define I(x, y, z) ((y) ^ ((x) | ~(z)))
237
238 /*
239 * The MD5 transformation for all four rounds.
240 */
241 #define STEP(f, a, b, c, d, x, t, s) \
242 (a) += f((b), (c), (d)) + (x) + (t); \
243 (a) = (((a) << (s)) | (((a) & 0xffffffff) >> (32 - (s)))); \
244 (a) += (b);
245
246 /*
247 * SET reads 4 input bytes in little-endian byte order and stores them
248 * in a properly aligned word in host byte order.
249 *
250 * The check for little-endian architectures that tolerate unaligned
251 * memory accesses is just an optimization. Nothing will break if it
252 * doesn't work.
253 */
254 #if defined(__i386__) || defined(__x86_64__) || defined(__vax__)
255 #define SET(n) \
256 (*(MD5_u32plus *)(void *)&ptr[(n) * 4])
257 #define GET(n) \
258 SET(n)
259 #else
260 #define SET(n) \
261 (ctx->block[(n)] = \
262 (MD5_u32plus)ptr[(n) * 4] | \
263 ((MD5_u32plus)ptr[(n) * 4 + 1] << 8) | \
264 ((MD5_u32plus)ptr[(n) * 4 + 2] << 16) | \
265 ((MD5_u32plus)ptr[(n) * 4 + 3] << 24))
266 #define GET(n) \
267 (ctx->block[(n)])
268 #endif
269
270 /*
271 * This processes one or more 64-byte data blocks, but does NOT update
272 * the bit counters. There are no alignment requirements.
273 */
body(MD5_CTX * ctx,const void * data,unsigned long size)274 static const void *body(MD5_CTX *ctx, const void *data, unsigned long size)
275 {
276 const unsigned char *ptr;
277 MD5_u32plus a, b, c, d;
278 MD5_u32plus saved_a, saved_b, saved_c, saved_d;
279
280 ptr = (const unsigned char *)data;
281
282 a = ctx->a;
283 b = ctx->b;
284 c = ctx->c;
285 d = ctx->d;
286
287 do {
288 saved_a = a;
289 saved_b = b;
290 saved_c = c;
291 saved_d = d;
292
293 /* Round 1 */
294 STEP(F, a, b, c, d, SET(0), 0xd76aa478, 7)
295 STEP(F, d, a, b, c, SET(1), 0xe8c7b756, 12)
296 STEP(F, c, d, a, b, SET(2), 0x242070db, 17)
297 STEP(F, b, c, d, a, SET(3), 0xc1bdceee, 22)
298 STEP(F, a, b, c, d, SET(4), 0xf57c0faf, 7)
299 STEP(F, d, a, b, c, SET(5), 0x4787c62a, 12)
300 STEP(F, c, d, a, b, SET(6), 0xa8304613, 17)
301 STEP(F, b, c, d, a, SET(7), 0xfd469501, 22)
302 STEP(F, a, b, c, d, SET(8), 0x698098d8, 7)
303 STEP(F, d, a, b, c, SET(9), 0x8b44f7af, 12)
304 STEP(F, c, d, a, b, SET(10), 0xffff5bb1, 17)
305 STEP(F, b, c, d, a, SET(11), 0x895cd7be, 22)
306 STEP(F, a, b, c, d, SET(12), 0x6b901122, 7)
307 STEP(F, d, a, b, c, SET(13), 0xfd987193, 12)
308 STEP(F, c, d, a, b, SET(14), 0xa679438e, 17)
309 STEP(F, b, c, d, a, SET(15), 0x49b40821, 22)
310
311 /* Round 2 */
312 STEP(G, a, b, c, d, GET(1), 0xf61e2562, 5)
313 STEP(G, d, a, b, c, GET(6), 0xc040b340, 9)
314 STEP(G, c, d, a, b, GET(11), 0x265e5a51, 14)
315 STEP(G, b, c, d, a, GET(0), 0xe9b6c7aa, 20)
316 STEP(G, a, b, c, d, GET(5), 0xd62f105d, 5)
317 STEP(G, d, a, b, c, GET(10), 0x02441453, 9)
318 STEP(G, c, d, a, b, GET(15), 0xd8a1e681, 14)
319 STEP(G, b, c, d, a, GET(4), 0xe7d3fbc8, 20)
320 STEP(G, a, b, c, d, GET(9), 0x21e1cde6, 5)
321 STEP(G, d, a, b, c, GET(14), 0xc33707d6, 9)
322 STEP(G, c, d, a, b, GET(3), 0xf4d50d87, 14)
323 STEP(G, b, c, d, a, GET(8), 0x455a14ed, 20)
324 STEP(G, a, b, c, d, GET(13), 0xa9e3e905, 5)
325 STEP(G, d, a, b, c, GET(2), 0xfcefa3f8, 9)
326 STEP(G, c, d, a, b, GET(7), 0x676f02d9, 14)
327 STEP(G, b, c, d, a, GET(12), 0x8d2a4c8a, 20)
328
329 /* Round 3 */
330 STEP(H, a, b, c, d, GET(5), 0xfffa3942, 4)
331 STEP(H2, d, a, b, c, GET(8), 0x8771f681, 11)
332 STEP(H, c, d, a, b, GET(11), 0x6d9d6122, 16)
333 STEP(H2, b, c, d, a, GET(14), 0xfde5380c, 23)
334 STEP(H, a, b, c, d, GET(1), 0xa4beea44, 4)
335 STEP(H2, d, a, b, c, GET(4), 0x4bdecfa9, 11)
336 STEP(H, c, d, a, b, GET(7), 0xf6bb4b60, 16)
337 STEP(H2, b, c, d, a, GET(10), 0xbebfbc70, 23)
338 STEP(H, a, b, c, d, GET(13), 0x289b7ec6, 4)
339 STEP(H2, d, a, b, c, GET(0), 0xeaa127fa, 11)
340 STEP(H, c, d, a, b, GET(3), 0xd4ef3085, 16)
341 STEP(H2, b, c, d, a, GET(6), 0x04881d05, 23)
342 STEP(H, a, b, c, d, GET(9), 0xd9d4d039, 4)
343 STEP(H2, d, a, b, c, GET(12), 0xe6db99e5, 11)
344 STEP(H, c, d, a, b, GET(15), 0x1fa27cf8, 16)
345 STEP(H2, b, c, d, a, GET(2), 0xc4ac5665, 23)
346
347 /* Round 4 */
348 STEP(I, a, b, c, d, GET(0), 0xf4292244, 6)
349 STEP(I, d, a, b, c, GET(7), 0x432aff97, 10)
350 STEP(I, c, d, a, b, GET(14), 0xab9423a7, 15)
351 STEP(I, b, c, d, a, GET(5), 0xfc93a039, 21)
352 STEP(I, a, b, c, d, GET(12), 0x655b59c3, 6)
353 STEP(I, d, a, b, c, GET(3), 0x8f0ccc92, 10)
354 STEP(I, c, d, a, b, GET(10), 0xffeff47d, 15)
355 STEP(I, b, c, d, a, GET(1), 0x85845dd1, 21)
356 STEP(I, a, b, c, d, GET(8), 0x6fa87e4f, 6)
357 STEP(I, d, a, b, c, GET(15), 0xfe2ce6e0, 10)
358 STEP(I, c, d, a, b, GET(6), 0xa3014314, 15)
359 STEP(I, b, c, d, a, GET(13), 0x4e0811a1, 21)
360 STEP(I, a, b, c, d, GET(4), 0xf7537e82, 6)
361 STEP(I, d, a, b, c, GET(11), 0xbd3af235, 10)
362 STEP(I, c, d, a, b, GET(2), 0x2ad7d2bb, 15)
363 STEP(I, b, c, d, a, GET(9), 0xeb86d391, 21)
364
365 a += saved_a;
366 b += saved_b;
367 c += saved_c;
368 d += saved_d;
369
370 ptr += 64;
371 } while(size -= 64);
372
373 ctx->a = a;
374 ctx->b = b;
375 ctx->c = c;
376 ctx->d = d;
377
378 return ptr;
379 }
380
MD5_Init(MD5_CTX * ctx)381 static void MD5_Init(MD5_CTX *ctx)
382 {
383 ctx->a = 0x67452301;
384 ctx->b = 0xefcdab89;
385 ctx->c = 0x98badcfe;
386 ctx->d = 0x10325476;
387
388 ctx->lo = 0;
389 ctx->hi = 0;
390 }
391
MD5_Update(MD5_CTX * ctx,const void * data,unsigned long size)392 static void MD5_Update(MD5_CTX *ctx, const void *data, unsigned long size)
393 {
394 MD5_u32plus saved_lo;
395 unsigned long used, available;
396
397 saved_lo = ctx->lo;
398 ctx->lo = (saved_lo + size) & 0x1fffffff;
399 if(ctx->lo < saved_lo)
400 ctx->hi++;
401 ctx->hi += (MD5_u32plus)size >> 29;
402
403 used = saved_lo & 0x3f;
404
405 if(used) {
406 available = 64 - used;
407
408 if(size < available) {
409 memcpy(&ctx->buffer[used], data, size);
410 return;
411 }
412
413 memcpy(&ctx->buffer[used], data, available);
414 data = (const unsigned char *)data + available;
415 size -= available;
416 body(ctx, ctx->buffer, 64);
417 }
418
419 if(size >= 64) {
420 data = body(ctx, data, size & ~(unsigned long)0x3f);
421 size &= 0x3f;
422 }
423
424 memcpy(ctx->buffer, data, size);
425 }
426
MD5_Final(unsigned char * result,MD5_CTX * ctx)427 static void MD5_Final(unsigned char *result, MD5_CTX *ctx)
428 {
429 unsigned long used, available;
430
431 used = ctx->lo & 0x3f;
432
433 ctx->buffer[used++] = 0x80;
434
435 available = 64 - used;
436
437 if(available < 8) {
438 memset(&ctx->buffer[used], 0, available);
439 body(ctx, ctx->buffer, 64);
440 used = 0;
441 available = 64;
442 }
443
444 memset(&ctx->buffer[used], 0, available - 8);
445
446 ctx->lo <<= 3;
447 ctx->buffer[56] = curlx_ultouc((ctx->lo)&0xff);
448 ctx->buffer[57] = curlx_ultouc((ctx->lo >> 8)&0xff);
449 ctx->buffer[58] = curlx_ultouc((ctx->lo >> 16)&0xff);
450 ctx->buffer[59] = curlx_ultouc(ctx->lo >> 24);
451 ctx->buffer[60] = curlx_ultouc((ctx->hi)&0xff);
452 ctx->buffer[61] = curlx_ultouc((ctx->hi >> 8)&0xff);
453 ctx->buffer[62] = curlx_ultouc((ctx->hi >> 16)&0xff);
454 ctx->buffer[63] = curlx_ultouc(ctx->hi >> 24);
455
456 body(ctx, ctx->buffer, 64);
457
458 result[0] = curlx_ultouc((ctx->a)&0xff);
459 result[1] = curlx_ultouc((ctx->a >> 8)&0xff);
460 result[2] = curlx_ultouc((ctx->a >> 16)&0xff);
461 result[3] = curlx_ultouc(ctx->a >> 24);
462 result[4] = curlx_ultouc((ctx->b)&0xff);
463 result[5] = curlx_ultouc((ctx->b >> 8)&0xff);
464 result[6] = curlx_ultouc((ctx->b >> 16)&0xff);
465 result[7] = curlx_ultouc(ctx->b >> 24);
466 result[8] = curlx_ultouc((ctx->c)&0xff);
467 result[9] = curlx_ultouc((ctx->c >> 8)&0xff);
468 result[10] = curlx_ultouc((ctx->c >> 16)&0xff);
469 result[11] = curlx_ultouc(ctx->c >> 24);
470 result[12] = curlx_ultouc((ctx->d)&0xff);
471 result[13] = curlx_ultouc((ctx->d >> 8)&0xff);
472 result[14] = curlx_ultouc((ctx->d >> 16)&0xff);
473 result[15] = curlx_ultouc(ctx->d >> 24);
474
475 memset(ctx, 0, sizeof(*ctx));
476 }
477
478 #endif /* CRYPTO LIBS */
479
480 const HMAC_params Curl_HMAC_MD5[] = {
481 {
482 /* Hash initialization function. */
483 CURLX_FUNCTION_CAST(HMAC_hinit_func, MD5_Init),
484 /* Hash update function. */
485 CURLX_FUNCTION_CAST(HMAC_hupdate_func, MD5_Update),
486 /* Hash computation end function. */
487 CURLX_FUNCTION_CAST(HMAC_hfinal_func, MD5_Final),
488 /* Size of hash context structure. */
489 sizeof(MD5_CTX),
490 /* Maximum key length. */
491 64,
492 /* Result size. */
493 16
494 }
495 };
496
497 const MD5_params Curl_DIGEST_MD5[] = {
498 {
499 /* Digest initialization function */
500 CURLX_FUNCTION_CAST(Curl_MD5_init_func, MD5_Init),
501 /* Digest update function */
502 CURLX_FUNCTION_CAST(Curl_MD5_update_func, MD5_Update),
503 /* Digest computation end function */
504 CURLX_FUNCTION_CAST(Curl_MD5_final_func, MD5_Final),
505 /* Size of digest context struct */
506 sizeof(MD5_CTX),
507 /* Result size */
508 16
509 }
510 };
511
512 /*
513 * @unittest: 1601
514 */
Curl_md5it(unsigned char * outbuffer,const unsigned char * input)515 void Curl_md5it(unsigned char *outbuffer, /* 16 bytes */
516 const unsigned char *input)
517 {
518 MD5_CTX ctx;
519 MD5_Init(&ctx);
520 MD5_Update(&ctx, input, curlx_uztoui(strlen((char *)input)));
521 MD5_Final(outbuffer, &ctx);
522 }
523
Curl_MD5_init(const MD5_params * md5params)524 MD5_context *Curl_MD5_init(const MD5_params *md5params)
525 {
526 MD5_context *ctxt;
527
528 /* Create MD5 context */
529 ctxt = malloc(sizeof(*ctxt));
530
531 if(!ctxt)
532 return ctxt;
533
534 ctxt->md5_hashctx = malloc(md5params->md5_ctxtsize);
535
536 if(!ctxt->md5_hashctx) {
537 free(ctxt);
538 return NULL;
539 }
540
541 ctxt->md5_hash = md5params;
542
543 (*md5params->md5_init_func)(ctxt->md5_hashctx);
544
545 return ctxt;
546 }
547
Curl_MD5_update(MD5_context * context,const unsigned char * data,unsigned int len)548 int Curl_MD5_update(MD5_context *context,
549 const unsigned char *data,
550 unsigned int len)
551 {
552 (*context->md5_hash->md5_update_func)(context->md5_hashctx, data, len);
553
554 return 0;
555 }
556
Curl_MD5_final(MD5_context * context,unsigned char * result)557 int Curl_MD5_final(MD5_context *context, unsigned char *result)
558 {
559 (*context->md5_hash->md5_final_func)(result, context->md5_hashctx);
560
561 free(context->md5_hashctx);
562 free(context);
563
564 return 0;
565 }
566
567 #endif /* CURL_DISABLE_CRYPTO_AUTH */
568