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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. | |
0f113f3e | 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). | |
0f113f3e | 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. | |
0f113f3e | 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 :-). | |
0f113f3e | 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)" | |
0f113f3e | 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. | |
0f113f3e | 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> |
b39fc560 | 62 | #include "internal/cryptlib.h" |
d02b48c6 | 63 | |
0f113f3e 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 | |
0f113f3e MC |
72 | /* |
73 | * the following pointers may be changed as long as 'allow_customize' is set | |
74 | */ | |
a5435e8b | 75 | |
0f113f3e | 76 | static void *(*malloc_func) (size_t) = malloc; |
a5435e8b | 77 | static void *default_malloc_ex(size_t num, const char *file, int line) |
0f113f3e MC |
78 | { |
79 | return malloc_func(num); | |
80 | } | |
81 | ||
82 | static void *(*malloc_ex_func) (size_t, const char *file, int line) | |
83 | = default_malloc_ex; | |
a5435e8b | 84 | |
0f113f3e | 85 | static void *(*realloc_func) (void *, size_t) = realloc; |
a5435e8b | 86 | static void *default_realloc_ex(void *str, size_t num, |
0f113f3e MC |
87 | const char *file, int line) |
88 | { | |
89 | return realloc_func(str, num); | |
90 | } | |
a5435e8b | 91 | |
0f113f3e MC |
92 | static void *(*realloc_ex_func) (void *, size_t, const char *file, int line) |
93 | = default_realloc_ex; | |
0cd08cce | 94 | |
0f113f3e | 95 | static void (*free_func) (void *) = free; |
a5435e8b | 96 | |
0f113f3e 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 | |
0f113f3e MC |
103 | static void *(*malloc_locked_ex_func) (size_t, const char *file, int line) |
104 | = default_malloc_locked_ex; | |
a5435e8b | 105 | |
0f113f3e | 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 */ |
71fa4513 | 110 | #ifdef CRYPTO_MDEBUG |
65962686 | 111 | /* use default functions from mem_dbg.c */ |
0f113f3e 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; | |
f3a2a044 | 120 | #else |
0f113f3e MC |
121 | /* |
122 | * applications can use CRYPTO_malloc_debug_init() to select above case at | |
123 | * run-time | |
124 | */ | |
125 | static void (*malloc_debug_func) (void *, int, const char *, int, int) = NULL; | |
126 | static void (*realloc_debug_func) (void *, void *, int, const char *, int, | |
127 | int) | |
128 | = NULL; | |
129 | static void (*free_debug_func) (void *, int) = NULL; | |
130 | static void (*set_debug_options_func) (long) = NULL; | |
131 | static long (*get_debug_options_func) (void) = NULL; | |
f3a2a044 | 132 | #endif |
9ac42ed8 | 133 | |
0f113f3e MC |
134 | int CRYPTO_set_mem_functions(void *(*m) (size_t), void *(*r) (void *, size_t), |
135 | void (*f) (void *)) | |
136 | { | |
137 | /* Dummy call just to ensure OPENSSL_init() gets linked in */ | |
138 | OPENSSL_init(); | |
139 | if (!allow_customize) | |
140 | return 0; | |
141 | if ((m == 0) || (r == 0) || (f == 0)) | |
142 | return 0; | |
143 | malloc_func = m; | |
144 | malloc_ex_func = default_malloc_ex; | |
145 | realloc_func = r; | |
146 | realloc_ex_func = default_realloc_ex; | |
147 | free_func = f; | |
148 | malloc_locked_func = m; | |
149 | malloc_locked_ex_func = default_malloc_locked_ex; | |
150 | free_locked_func = f; | |
151 | return 1; | |
152 | } | |
153 | ||
154 | int CRYPTO_set_mem_ex_functions(void *(*m) (size_t, const char *, int), | |
155 | void *(*r) (void *, size_t, const char *, | |
156 | int), void (*f) (void *)) | |
157 | { | |
158 | if (!allow_customize) | |
159 | return 0; | |
160 | if ((m == 0) || (r == 0) || (f == 0)) | |
161 | return 0; | |
162 | malloc_func = 0; | |
163 | malloc_ex_func = m; | |
164 | realloc_func = 0; | |
165 | realloc_ex_func = r; | |
166 | free_func = f; | |
167 | malloc_locked_func = 0; | |
168 | malloc_locked_ex_func = m; | |
169 | free_locked_func = f; | |
170 | return 1; | |
171 | } | |
172 | ||
173 | int CRYPTO_set_locked_mem_functions(void *(*m) (size_t), void (*f) (void *)) | |
174 | { | |
175 | if (!allow_customize) | |
176 | return 0; | |
177 | if ((m == NULL) || (f == NULL)) | |
178 | return 0; | |
179 | malloc_locked_func = m; | |
180 | malloc_locked_ex_func = default_malloc_locked_ex; | |
181 | free_locked_func = f; | |
182 | return 1; | |
183 | } | |
184 | ||
185 | int CRYPTO_set_locked_mem_ex_functions(void *(*m) (size_t, const char *, int), | |
186 | void (*f) (void *)) | |
187 | { | |
188 | if (!allow_customize) | |
189 | return 0; | |
190 | if ((m == NULL) || (f == NULL)) | |
191 | return 0; | |
192 | malloc_locked_func = 0; | |
193 | malloc_locked_ex_func = m; | |
194 | free_func = f; | |
195 | return 1; | |
196 | } | |
197 | ||
198 | int CRYPTO_set_mem_debug_functions(void (*m) | |
199 | (void *, int, const char *, int, int), | |
200 | void (*r) (void *, void *, int, | |
201 | const char *, int, int), | |
202 | void (*f) (void *, int), void (*so) (long), | |
203 | long (*go) (void)) | |
204 | { | |
205 | if (!allow_customize_debug) | |
206 | return 0; | |
207 | malloc_debug_func = m; | |
208 | realloc_debug_func = r; | |
209 | free_debug_func = f; | |
210 | set_debug_options_func = so; | |
211 | get_debug_options_func = go; | |
212 | return 1; | |
213 | } | |
214 | ||
215 | void CRYPTO_get_mem_functions(void *(**m) (size_t), | |
216 | void *(**r) (void *, size_t), | |
217 | void (**f) (void *)) | |
218 | { | |
219 | if (m != NULL) | |
220 | *m = (malloc_ex_func == default_malloc_ex) ? malloc_func : 0; | |
221 | if (r != NULL) | |
222 | *r = (realloc_ex_func == default_realloc_ex) ? realloc_func : 0; | |
223 | if (f != NULL) | |
224 | *f = free_func; | |
225 | } | |
226 | ||
227 | void CRYPTO_get_mem_ex_functions(void *(**m) (size_t, const char *, int), | |
228 | void *(**r) (void *, size_t, const char *, | |
229 | int), void (**f) (void *)) | |
230 | { | |
231 | if (m != NULL) | |
232 | *m = (malloc_ex_func != default_malloc_ex) ? malloc_ex_func : 0; | |
233 | if (r != NULL) | |
234 | *r = (realloc_ex_func != default_realloc_ex) ? realloc_ex_func : 0; | |
235 | if (f != NULL) | |
236 | *f = free_func; | |
237 | } | |
238 | ||
239 | void CRYPTO_get_locked_mem_functions(void *(**m) (size_t), | |
240 | void (**f) (void *)) | |
241 | { | |
242 | if (m != NULL) | |
243 | *m = (malloc_locked_ex_func == default_malloc_locked_ex) ? | |
244 | malloc_locked_func : 0; | |
245 | if (f != NULL) | |
246 | *f = free_locked_func; | |
247 | } | |
248 | ||
249 | void CRYPTO_get_locked_mem_ex_functions(void | |
250 | *(**m) (size_t, const char *, int), | |
251 | void (**f) (void *)) | |
252 | { | |
253 | if (m != NULL) | |
254 | *m = (malloc_locked_ex_func != default_malloc_locked_ex) ? | |
255 | malloc_locked_ex_func : 0; | |
256 | if (f != NULL) | |
257 | *f = free_locked_func; | |
258 | } | |
259 | ||
260 | void CRYPTO_get_mem_debug_functions(void (**m) | |
261 | (void *, int, const char *, int, int), | |
262 | void (**r) (void *, void *, int, | |
263 | const char *, int, int), | |
264 | void (**f) (void *, int), | |
265 | void (**so) (long), long (**go) (void)) | |
266 | { | |
267 | if (m != NULL) | |
268 | *m = malloc_debug_func; | |
269 | if (r != NULL) | |
270 | *r = realloc_debug_func; | |
271 | if (f != NULL) | |
272 | *f = free_debug_func; | |
273 | if (so != NULL) | |
274 | *so = set_debug_options_func; | |
275 | if (go != NULL) | |
276 | *go = get_debug_options_func; | |
277 | } | |
d02b48c6 | 278 | |
6343829a | 279 | void *CRYPTO_malloc_locked(int num, const char *file, int line) |
0f113f3e MC |
280 | { |
281 | void *ret = NULL; | |
282 | ||
283 | if (num <= 0) | |
284 | return NULL; | |
285 | ||
286 | if (allow_customize) | |
287 | allow_customize = 0; | |
288 | if (malloc_debug_func != NULL) { | |
289 | if (allow_customize_debug) | |
290 | allow_customize_debug = 0; | |
291 | malloc_debug_func(NULL, num, file, line, 0); | |
292 | } | |
293 | ret = malloc_locked_ex_func(num, file, line); | |
8d28d5f8 | 294 | #ifdef LEVITTE_DEBUG_MEM |
0f113f3e | 295 | fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num); |
3dff94c2 | 296 | #endif |
0f113f3e MC |
297 | if (malloc_debug_func != NULL) |
298 | malloc_debug_func(ret, num, file, line, 1); | |
1f575f1b | 299 | |
b2dba9bf | 300 | #ifndef OPENSSL_CPUID_OBJ |
0f113f3e MC |
301 | /* |
302 | * Create a dependency on the value of 'cleanse_ctr' so our memory | |
303 | * sanitisation function can't be optimised out. NB: We only do this for | |
304 | * >2Kb so the overhead doesn't bother us. | |
305 | */ | |
306 | if (ret && (num > 2048)) { | |
307 | extern unsigned char cleanse_ctr; | |
308 | ((unsigned char *)ret)[0] = cleanse_ctr; | |
309 | } | |
b2dba9bf | 310 | #endif |
df29cc8f | 311 | |
0f113f3e MC |
312 | return ret; |
313 | } | |
d02b48c6 | 314 | |
9ac42ed8 | 315 | void CRYPTO_free_locked(void *str) |
0f113f3e MC |
316 | { |
317 | if (free_debug_func != NULL) | |
318 | free_debug_func(str, 0); | |
8d28d5f8 | 319 | #ifdef LEVITTE_DEBUG_MEM |
0f113f3e | 320 | fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str); |
9ac42ed8 | 321 | #endif |
0f113f3e MC |
322 | free_locked_func(str); |
323 | if (free_debug_func != NULL) | |
324 | free_debug_func(NULL, 1); | |
325 | } | |
d02b48c6 | 326 | |
6343829a | 327 | void *CRYPTO_malloc(int num, const char *file, int line) |
0f113f3e MC |
328 | { |
329 | void *ret = NULL; | |
330 | ||
331 | if (num <= 0) | |
332 | return NULL; | |
333 | ||
334 | if (allow_customize) | |
335 | allow_customize = 0; | |
336 | if (malloc_debug_func != NULL) { | |
337 | if (allow_customize_debug) | |
338 | allow_customize_debug = 0; | |
339 | malloc_debug_func(NULL, num, file, line, 0); | |
340 | } | |
341 | ret = malloc_ex_func(num, file, line); | |
8d28d5f8 | 342 | #ifdef LEVITTE_DEBUG_MEM |
0f113f3e | 343 | fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num); |
9ac42ed8 | 344 | #endif |
0f113f3e MC |
345 | if (malloc_debug_func != NULL) |
346 | malloc_debug_func(ret, num, file, line, 1); | |
d02b48c6 | 347 | |
b2dba9bf | 348 | #ifndef OPENSSL_CPUID_OBJ |
0f113f3e MC |
349 | /* |
350 | * Create a dependency on the value of 'cleanse_ctr' so our memory | |
351 | * sanitisation function can't be optimised out. NB: We only do this for | |
352 | * >2Kb so the overhead doesn't bother us. | |
353 | */ | |
354 | if (ret && (num > 2048)) { | |
355 | extern unsigned char cleanse_ctr; | |
356 | ((unsigned char *)ret)[0] = cleanse_ctr; | |
357 | } | |
b2dba9bf | 358 | #endif |
df29cc8f | 359 | |
0f113f3e MC |
360 | return ret; |
361 | } | |
362 | ||
6caa4edd | 363 | char *CRYPTO_strdup(const char *str, const char *file, int line) |
0f113f3e MC |
364 | { |
365 | char *ret = CRYPTO_malloc(strlen(str) + 1, file, line); | |
6caa4edd | 366 | |
8031d26b LV |
367 | if (ret == NULL) |
368 | return NULL; | |
369 | ||
0f113f3e MC |
370 | strcpy(ret, str); |
371 | return ret; | |
372 | } | |
d02b48c6 | 373 | |
6343829a | 374 | void *CRYPTO_realloc(void *str, int num, const char *file, int line) |
0f113f3e MC |
375 | { |
376 | void *ret = NULL; | |
d02b48c6 | 377 | |
0f113f3e MC |
378 | if (str == NULL) |
379 | return CRYPTO_malloc(num, file, line); | |
d5234c7b | 380 | |
0f113f3e MC |
381 | if (num <= 0) |
382 | return NULL; | |
d5234c7b | 383 | |
0f113f3e MC |
384 | if (realloc_debug_func != NULL) |
385 | realloc_debug_func(str, NULL, num, file, line, 0); | |
386 | ret = realloc_ex_func(str, num, file, line); | |
8d28d5f8 | 387 | #ifdef LEVITTE_DEBUG_MEM |
0f113f3e MC |
388 | fprintf(stderr, "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n", str, |
389 | ret, num); | |
1f575f1b | 390 | #endif |
0f113f3e MC |
391 | if (realloc_debug_func != NULL) |
392 | realloc_debug_func(str, ret, num, file, line, 1); | |
9ac42ed8 | 393 | |
0f113f3e MC |
394 | return ret; |
395 | } | |
d02b48c6 | 396 | |
6343829a | 397 | void *CRYPTO_realloc_clean(void *str, int old_len, int num, const char *file, |
0f113f3e MC |
398 | int line) |
399 | { | |
400 | void *ret = NULL; | |
401 | ||
402 | if (str == NULL) | |
403 | return CRYPTO_malloc(num, file, line); | |
404 | ||
405 | if (num <= 0) | |
406 | return NULL; | |
407 | ||
408 | /* | |
409 | * We don't support shrinking the buffer. Note the memcpy that copies | |
410 | * |old_len| bytes to the new buffer, below. | |
411 | */ | |
412 | if (num < old_len) | |
413 | return NULL; | |
414 | ||
415 | if (realloc_debug_func != NULL) | |
416 | realloc_debug_func(str, NULL, num, file, line, 0); | |
417 | ret = malloc_ex_func(num, file, line); | |
418 | if (ret) { | |
419 | memcpy(ret, str, old_len); | |
4b45c6e5 | 420 | OPENSSL_clear_free(str, old_len); |
0f113f3e | 421 | } |
54a656ef | 422 | #ifdef LEVITTE_DEBUG_MEM |
0f113f3e MC |
423 | fprintf(stderr, |
424 | "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n", | |
425 | str, ret, num); | |
54a656ef | 426 | #endif |
0f113f3e MC |
427 | if (realloc_debug_func != NULL) |
428 | realloc_debug_func(str, ret, num, file, line, 1); | |
54a656ef | 429 | |
0f113f3e MC |
430 | return ret; |
431 | } | |
54a656ef | 432 | |
9ac42ed8 | 433 | void CRYPTO_free(void *str) |
0f113f3e MC |
434 | { |
435 | if (free_debug_func != NULL) | |
436 | free_debug_func(str, 0); | |
8d28d5f8 | 437 | #ifdef LEVITTE_DEBUG_MEM |
0f113f3e | 438 | fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str); |
dfeab068 | 439 | #endif |
0f113f3e MC |
440 | free_func(str); |
441 | if (free_debug_func != NULL) | |
442 | free_debug_func(NULL, 1); | |
443 | } | |
d02b48c6 | 444 | |
4b45c6e5 RS |
445 | void CRYPTO_clear_free(void *str, size_t num) |
446 | { | |
447 | if (!str) | |
448 | return; | |
449 | if (num) | |
450 | OPENSSL_cleanse(str, num); | |
451 | CRYPTO_free(str); | |
452 | } | |
453 | ||
6343829a | 454 | void *CRYPTO_remalloc(void *a, int num, const char *file, int line) |
0f113f3e | 455 | { |
b548a1f1 | 456 | OPENSSL_free(a); |
b196e7d9 | 457 | a = OPENSSL_malloc(num); |
0f113f3e MC |
458 | return (a); |
459 | } | |
d02b48c6 | 460 | |
0cd08cce | 461 | void CRYPTO_set_mem_debug_options(long bits) |
0f113f3e MC |
462 | { |
463 | if (set_debug_options_func != NULL) | |
464 | set_debug_options_func(bits); | |
465 | } | |
d02b48c6 | 466 | |
667ac4ec | 467 | long CRYPTO_get_mem_debug_options(void) |
0f113f3e MC |
468 | { |
469 | if (get_debug_options_func != NULL) | |
470 | return get_debug_options_func(); | |
471 | return 0; | |
472 | } |