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d02b48c6 | 1 | /* crypto/mem.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
3 | * All rights reserved. |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
40720ce3 | 8 | * |
d02b48c6 RE |
9 | * This library is free for commercial and non-commercial use as long as |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
40720ce3 | 15 | * |
d02b48c6 RE |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
40720ce3 | 22 | * |
d02b48c6 RE |
23 | * Redistribution and use in source and binary forms, with or without |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
40720ce3 | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40720ce3 | 40 | * |
d02b48c6 RE |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
40720ce3 | 52 | * |
d02b48c6 RE |
53 | * The licence and distribution terms for any publically available version or |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
58 | ||
59 | #include <stdio.h> | |
60 | #include <stdlib.h> | |
458cddc1 | 61 | #include <openssl/crypto.h> |
d02b48c6 RE |
62 | #include "cryptlib.h" |
63 | ||
40720ce3 MC |
64 | static int allow_customize = 1; /* we provide flexible functions for */ |
65 | static int allow_customize_debug = 1; /* exchanging memory-related functions | |
66 | * at run-time, but this must be done | |
67 | * before any blocks are actually | |
68 | * allocated; or we'll run into huge | |
69 | * problems when malloc/free pairs | |
70 | * don't match etc. */ | |
1f575f1b | 71 | |
40720ce3 MC |
72 | /* |
73 | * the following pointers may be changed as long as 'allow_customize' is set | |
74 | */ | |
a5435e8b | 75 | |
40720ce3 | 76 | static void *(*malloc_func) (size_t) = malloc; |
a5435e8b | 77 | static void *default_malloc_ex(size_t num, const char *file, int line) |
40720ce3 MC |
78 | { |
79 | return malloc_func(num); | |
80 | } | |
a5435e8b | 81 | |
40720ce3 MC |
82 | static void *(*malloc_ex_func) (size_t, const char *file, int line) |
83 | = default_malloc_ex; | |
84 | ||
85 | static void *(*realloc_func) (void *, size_t) = realloc; | |
a5435e8b | 86 | static void *default_realloc_ex(void *str, size_t num, |
40720ce3 MC |
87 | const char *file, int line) |
88 | { | |
89 | return realloc_func(str, num); | |
90 | } | |
a5435e8b | 91 | |
40720ce3 MC |
92 | static void *(*realloc_ex_func) (void *, size_t, const char *file, int line) |
93 | = default_realloc_ex; | |
0cd08cce | 94 | |
40720ce3 | 95 | static void (*free_func) (void *) = free; |
a5435e8b | 96 | |
40720ce3 MC |
97 | static void *(*malloc_locked_func) (size_t) = malloc; |
98 | static void *default_malloc_locked_ex(size_t num, const char *file, int line) | |
99 | { | |
100 | return malloc_locked_func(num); | |
101 | } | |
65a22e8e | 102 | |
40720ce3 MC |
103 | static void *(*malloc_locked_ex_func) (size_t, const char *file, int line) |
104 | = default_malloc_locked_ex; | |
a5435e8b | 105 | |
40720ce3 | 106 | static void (*free_locked_func) (void *) = free; |
a5435e8b BM |
107 | |
108 | /* may be changed as long as 'allow_customize_debug' is set */ | |
0cd08cce | 109 | /* XXX use correct function pointer types */ |
8067d34b | 110 | #if defined(CRYPTO_MDEBUG) && !defined(OPENSSL_FIPS) |
65962686 | 111 | /* use default functions from mem_dbg.c */ |
40720ce3 MC |
112 | static void (*malloc_debug_func) (void *, int, const char *, int, int) |
113 | = CRYPTO_dbg_malloc; | |
114 | static void (*realloc_debug_func) (void *, void *, int, const char *, int, | |
115 | int) | |
116 | = CRYPTO_dbg_realloc; | |
117 | static void (*free_debug_func) (void *, int) = CRYPTO_dbg_free; | |
118 | static void (*set_debug_options_func) (long) = CRYPTO_dbg_set_options; | |
119 | static long (*get_debug_options_func) (void) = CRYPTO_dbg_get_options; | |
120 | ||
121 | static int (*push_info_func) (const char *info, const char *file, int line) | |
122 | = CRYPTO_dbg_push_info; | |
123 | static int (*pop_info_func) (void) | |
124 | = CRYPTO_dbg_pop_info; | |
125 | static int (*remove_all_info_func) (void) | |
126 | = CRYPTO_dbg_remove_all_info; | |
8067d34b | 127 | |
f3a2a044 | 128 | #else |
40720ce3 MC |
129 | /* |
130 | * applications can use CRYPTO_malloc_debug_init() to select above case at | |
131 | * run-time | |
132 | */ | |
133 | static void (*malloc_debug_func) (void *, int, const char *, int, int) = NULL; | |
134 | static void (*realloc_debug_func) (void *, void *, int, const char *, int, | |
135 | int) | |
136 | = NULL; | |
137 | static void (*free_debug_func) (void *, int) = NULL; | |
138 | static void (*set_debug_options_func) (long) = NULL; | |
139 | static long (*get_debug_options_func) (void) = NULL; | |
140 | ||
141 | static int (*push_info_func) (const char *info, const char *file, int line) | |
142 | = NULL; | |
143 | static int (*pop_info_func) (void) = NULL; | |
144 | static int (*remove_all_info_func) (void) = NULL; | |
8067d34b | 145 | |
f3a2a044 | 146 | #endif |
9ac42ed8 | 147 | |
40720ce3 MC |
148 | int CRYPTO_set_mem_functions(void *(*m) (size_t), void *(*r) (void *, size_t), |
149 | void (*f) (void *)) | |
150 | { | |
151 | if (!allow_customize) | |
152 | return 0; | |
153 | if ((m == 0) || (r == 0) || (f == 0)) | |
154 | return 0; | |
155 | malloc_func = m; | |
156 | malloc_ex_func = default_malloc_ex; | |
157 | realloc_func = r; | |
158 | realloc_ex_func = default_realloc_ex; | |
159 | free_func = f; | |
160 | malloc_locked_func = m; | |
161 | malloc_locked_ex_func = default_malloc_locked_ex; | |
162 | free_locked_func = f; | |
163 | return 1; | |
164 | } | |
165 | ||
166 | int CRYPTO_set_mem_ex_functions(void *(*m) (size_t, const char *, int), | |
167 | void *(*r) (void *, size_t, const char *, | |
168 | int), void (*f) (void *)) | |
169 | { | |
170 | if (!allow_customize) | |
171 | return 0; | |
172 | if ((m == 0) || (r == 0) || (f == 0)) | |
173 | return 0; | |
174 | malloc_func = 0; | |
175 | malloc_ex_func = m; | |
176 | realloc_func = 0; | |
177 | realloc_ex_func = r; | |
178 | free_func = f; | |
179 | malloc_locked_func = 0; | |
180 | malloc_locked_ex_func = m; | |
181 | free_locked_func = f; | |
182 | return 1; | |
183 | } | |
184 | ||
185 | int CRYPTO_set_locked_mem_functions(void *(*m) (size_t), void (*f) (void *)) | |
186 | { | |
187 | if (!allow_customize) | |
188 | return 0; | |
189 | if ((m == NULL) || (f == NULL)) | |
190 | return 0; | |
191 | malloc_locked_func = m; | |
192 | malloc_locked_ex_func = default_malloc_locked_ex; | |
193 | free_locked_func = f; | |
194 | return 1; | |
195 | } | |
196 | ||
197 | int CRYPTO_set_locked_mem_ex_functions(void *(*m) (size_t, const char *, int), | |
198 | void (*f) (void *)) | |
199 | { | |
200 | if (!allow_customize) | |
201 | return 0; | |
202 | if ((m == NULL) || (f == NULL)) | |
203 | return 0; | |
204 | malloc_locked_func = 0; | |
205 | malloc_locked_ex_func = m; | |
206 | free_func = f; | |
207 | return 1; | |
208 | } | |
209 | ||
210 | int CRYPTO_set_mem_debug_functions(void (*m) | |
211 | (void *, int, const char *, int, int), | |
212 | void (*r) (void *, void *, int, | |
213 | const char *, int, int), | |
214 | void (*f) (void *, int), void (*so) (long), | |
215 | long (*go) (void)) | |
216 | { | |
217 | if (!allow_customize_debug) | |
218 | return 0; | |
219 | malloc_debug_func = m; | |
220 | realloc_debug_func = r; | |
221 | free_debug_func = f; | |
222 | set_debug_options_func = so; | |
223 | get_debug_options_func = go; | |
224 | return 1; | |
225 | } | |
226 | ||
227 | void CRYPTO_set_mem_info_functions(int (*push_info_fn) | |
228 | (const char *info, const char *file, | |
229 | int line), int (*pop_info_fn) (void), | |
230 | int (*remove_all_info_fn) (void)) | |
231 | { | |
232 | push_info_func = push_info_fn; | |
233 | pop_info_func = pop_info_fn; | |
234 | remove_all_info_func = remove_all_info_fn; | |
235 | } | |
236 | ||
237 | void CRYPTO_get_mem_functions(void *(**m) (size_t), | |
238 | void *(**r) (void *, size_t), | |
239 | void (**f) (void *)) | |
240 | { | |
241 | if (m != NULL) | |
242 | *m = (malloc_ex_func == default_malloc_ex) ? malloc_func : 0; | |
243 | if (r != NULL) | |
244 | *r = (realloc_ex_func == default_realloc_ex) ? realloc_func : 0; | |
245 | if (f != NULL) | |
246 | *f = free_func; | |
247 | } | |
248 | ||
249 | void CRYPTO_get_mem_ex_functions(void *(**m) (size_t, const char *, int), | |
250 | void *(**r) (void *, size_t, const char *, | |
251 | int), void (**f) (void *)) | |
252 | { | |
253 | if (m != NULL) | |
254 | *m = (malloc_ex_func != default_malloc_ex) ? malloc_ex_func : 0; | |
255 | if (r != NULL) | |
256 | *r = (realloc_ex_func != default_realloc_ex) ? realloc_ex_func : 0; | |
257 | if (f != NULL) | |
258 | *f = free_func; | |
259 | } | |
260 | ||
261 | void CRYPTO_get_locked_mem_functions(void *(**m) (size_t), | |
262 | void (**f) (void *)) | |
263 | { | |
264 | if (m != NULL) | |
265 | *m = (malloc_locked_ex_func == default_malloc_locked_ex) ? | |
266 | malloc_locked_func : 0; | |
267 | if (f != NULL) | |
268 | *f = free_locked_func; | |
269 | } | |
270 | ||
271 | void CRYPTO_get_locked_mem_ex_functions(void | |
272 | *(**m) (size_t, const char *, int), | |
273 | void (**f) (void *)) | |
274 | { | |
275 | if (m != NULL) | |
276 | *m = (malloc_locked_ex_func != default_malloc_locked_ex) ? | |
277 | malloc_locked_ex_func : 0; | |
278 | if (f != NULL) | |
279 | *f = free_locked_func; | |
280 | } | |
281 | ||
282 | void CRYPTO_get_mem_debug_functions(void (**m) | |
283 | (void *, int, const char *, int, int), | |
284 | void (**r) (void *, void *, int, | |
285 | const char *, int, int), | |
286 | void (**f) (void *, int), | |
287 | void (**so) (long), long (**go) (void)) | |
288 | { | |
289 | if (m != NULL) | |
290 | *m = malloc_debug_func; | |
291 | if (r != NULL) | |
292 | *r = realloc_debug_func; | |
293 | if (f != NULL) | |
294 | *f = free_debug_func; | |
295 | if (so != NULL) | |
296 | *so = set_debug_options_func; | |
297 | if (go != NULL) | |
298 | *go = get_debug_options_func; | |
299 | } | |
d02b48c6 | 300 | |
9d1a01be | 301 | void *CRYPTO_malloc_locked(int num, const char *file, int line) |
40720ce3 MC |
302 | { |
303 | void *ret = NULL; | |
304 | extern unsigned char cleanse_ctr; | |
305 | ||
306 | if (num <= 0) | |
307 | return NULL; | |
308 | ||
309 | allow_customize = 0; | |
310 | if (malloc_debug_func != NULL) { | |
311 | allow_customize_debug = 0; | |
312 | malloc_debug_func(NULL, num, file, line, 0); | |
313 | } | |
314 | ret = malloc_locked_ex_func(num, file, line); | |
8d28d5f8 | 315 | #ifdef LEVITTE_DEBUG_MEM |
40720ce3 | 316 | fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num); |
3dff94c2 | 317 | #endif |
40720ce3 MC |
318 | if (malloc_debug_func != NULL) |
319 | malloc_debug_func(ret, num, file, line, 1); | |
1f575f1b | 320 | |
40720ce3 MC |
321 | /* |
322 | * Create a dependency on the value of 'cleanse_ctr' so our memory | |
323 | * sanitisation function can't be optimised out. NB: We only do this for | |
324 | * >2Kb so the overhead doesn't bother us. | |
325 | */ | |
326 | if (ret && (num > 2048)) | |
327 | ((unsigned char *)ret)[0] = cleanse_ctr; | |
df29cc8f | 328 | |
40720ce3 MC |
329 | return ret; |
330 | } | |
d02b48c6 | 331 | |
9ac42ed8 | 332 | void CRYPTO_free_locked(void *str) |
40720ce3 MC |
333 | { |
334 | if (free_debug_func != NULL) | |
335 | free_debug_func(str, 0); | |
8d28d5f8 | 336 | #ifdef LEVITTE_DEBUG_MEM |
40720ce3 | 337 | fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str); |
9ac42ed8 | 338 | #endif |
40720ce3 MC |
339 | free_locked_func(str); |
340 | if (free_debug_func != NULL) | |
341 | free_debug_func(NULL, 1); | |
342 | } | |
d02b48c6 | 343 | |
9d1a01be | 344 | void *CRYPTO_malloc(int num, const char *file, int line) |
40720ce3 MC |
345 | { |
346 | void *ret = NULL; | |
347 | extern unsigned char cleanse_ctr; | |
348 | ||
349 | if (num <= 0) | |
350 | return NULL; | |
351 | ||
352 | allow_customize = 0; | |
353 | if (malloc_debug_func != NULL) { | |
354 | allow_customize_debug = 0; | |
355 | malloc_debug_func(NULL, num, file, line, 0); | |
356 | } | |
357 | ret = malloc_ex_func(num, file, line); | |
8d28d5f8 | 358 | #ifdef LEVITTE_DEBUG_MEM |
40720ce3 | 359 | fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num); |
9ac42ed8 | 360 | #endif |
40720ce3 MC |
361 | if (malloc_debug_func != NULL) |
362 | malloc_debug_func(ret, num, file, line, 1); | |
d02b48c6 | 363 | |
40720ce3 MC |
364 | /* |
365 | * Create a dependency on the value of 'cleanse_ctr' so our memory | |
366 | * sanitisation function can't be optimised out. NB: We only do this for | |
367 | * >2Kb so the overhead doesn't bother us. | |
368 | */ | |
369 | if (ret && (num > 2048)) | |
370 | ((unsigned char *)ret)[0] = cleanse_ctr; | |
df29cc8f | 371 | |
40720ce3 MC |
372 | return ret; |
373 | } | |
d02b48c6 | 374 | |
9d1a01be | 375 | void *CRYPTO_realloc(void *str, int num, const char *file, int line) |
40720ce3 MC |
376 | { |
377 | void *ret = NULL; | |
d02b48c6 | 378 | |
40720ce3 MC |
379 | if (str == NULL) |
380 | return CRYPTO_malloc(num, file, line); | |
d5234c7b | 381 | |
40720ce3 MC |
382 | if (num <= 0) |
383 | return NULL; | |
d5234c7b | 384 | |
40720ce3 MC |
385 | if (realloc_debug_func != NULL) |
386 | realloc_debug_func(str, NULL, num, file, line, 0); | |
387 | ret = realloc_ex_func(str, num, file, line); | |
8d28d5f8 | 388 | #ifdef LEVITTE_DEBUG_MEM |
40720ce3 MC |
389 | fprintf(stderr, "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n", str, |
390 | ret, num); | |
1f575f1b | 391 | #endif |
40720ce3 MC |
392 | if (realloc_debug_func != NULL) |
393 | realloc_debug_func(str, ret, num, file, line, 1); | |
9ac42ed8 | 394 | |
40720ce3 MC |
395 | return ret; |
396 | } | |
d02b48c6 | 397 | |
54a656ef | 398 | void *CRYPTO_realloc_clean(void *str, int old_len, int num, const char *file, |
40720ce3 MC |
399 | int line) |
400 | { | |
401 | void *ret = NULL; | |
402 | ||
403 | if (str == NULL) | |
404 | return CRYPTO_malloc(num, file, line); | |
405 | ||
406 | if (num <= 0) | |
407 | return NULL; | |
408 | ||
409 | /* | |
410 | * We don't support shrinking the buffer. Note the memcpy that copies | |
411 | * |old_len| bytes to the new buffer, below. | |
412 | */ | |
413 | if (num < old_len) | |
414 | return NULL; | |
415 | ||
416 | if (realloc_debug_func != NULL) | |
417 | realloc_debug_func(str, NULL, num, file, line, 0); | |
418 | ret = malloc_ex_func(num, file, line); | |
419 | if (ret) { | |
420 | memcpy(ret, str, old_len); | |
421 | OPENSSL_cleanse(str, old_len); | |
422 | free_func(str); | |
423 | } | |
54a656ef | 424 | #ifdef LEVITTE_DEBUG_MEM |
40720ce3 MC |
425 | fprintf(stderr, |
426 | "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n", | |
427 | str, ret, num); | |
54a656ef | 428 | #endif |
40720ce3 MC |
429 | if (realloc_debug_func != NULL) |
430 | realloc_debug_func(str, ret, num, file, line, 1); | |
54a656ef | 431 | |
40720ce3 MC |
432 | return ret; |
433 | } | |
54a656ef | 434 | |
9ac42ed8 | 435 | void CRYPTO_free(void *str) |
40720ce3 MC |
436 | { |
437 | if (free_debug_func != NULL) | |
438 | free_debug_func(str, 0); | |
8d28d5f8 | 439 | #ifdef LEVITTE_DEBUG_MEM |
40720ce3 | 440 | fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str); |
dfeab068 | 441 | #endif |
40720ce3 MC |
442 | free_func(str); |
443 | if (free_debug_func != NULL) | |
444 | free_debug_func(NULL, 1); | |
445 | } | |
d02b48c6 | 446 | |
9d1a01be | 447 | void *CRYPTO_remalloc(void *a, int num, const char *file, int line) |
40720ce3 MC |
448 | { |
449 | if (a != NULL) | |
450 | OPENSSL_free(a); | |
451 | a = (char *)OPENSSL_malloc(num); | |
452 | return (a); | |
453 | } | |
d02b48c6 | 454 | |
0cd08cce | 455 | void CRYPTO_set_mem_debug_options(long bits) |
40720ce3 MC |
456 | { |
457 | if (set_debug_options_func != NULL) | |
458 | set_debug_options_func(bits); | |
459 | } | |
d02b48c6 | 460 | |
667ac4ec | 461 | long CRYPTO_get_mem_debug_options(void) |
40720ce3 MC |
462 | { |
463 | if (get_debug_options_func != NULL) | |
464 | return get_debug_options_func(); | |
465 | return 0; | |
466 | } | |
8067d34b DSH |
467 | |
468 | int CRYPTO_push_info_(const char *info, const char *file, int line) | |
40720ce3 MC |
469 | { |
470 | if (push_info_func) | |
471 | return push_info_func(info, file, line); | |
472 | return 1; | |
473 | } | |
8067d34b DSH |
474 | |
475 | int CRYPTO_pop_info(void) | |
40720ce3 MC |
476 | { |
477 | if (pop_info_func) | |
478 | return pop_info_func(); | |
479 | return 1; | |
480 | } | |
8067d34b DSH |
481 | |
482 | int CRYPTO_remove_all_info(void) | |
40720ce3 MC |
483 | { |
484 | if (remove_all_info_func) | |
485 | return remove_all_info_func(); | |
486 | return 1; | |
487 | } |