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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. | |
ae5c8664 | 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). | |
ae5c8664 | 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. | |
ae5c8664 | 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 :-). | |
ae5c8664 | 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)" | |
ae5c8664 | 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. | |
ae5c8664 | 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 | ||
ae5c8664 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 | |
ae5c8664 MC |
72 | /* |
73 | * the following pointers may be changed as long as 'allow_customize' is set | |
74 | */ | |
a5435e8b | 75 | |
ae5c8664 | 76 | static void *(*malloc_func) (size_t) = malloc; |
a5435e8b | 77 | static void *default_malloc_ex(size_t num, const char *file, int line) |
ae5c8664 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 | |
556c4b51 RL |
85 | #ifdef OPENSSL_SYS_VMS |
86 | # if __INITIAL_POINTER_SIZE == 64 | |
87 | # define realloc _realloc64 | |
b05f231c | 88 | # elif __INITIAL_POINTER_SIZE == 32 |
556c4b51 RL |
89 | # define realloc _realloc32 |
90 | # endif | |
91 | #endif | |
92 | ||
ae5c8664 | 93 | static void *(*realloc_func) (void *, size_t) = realloc; |
a5435e8b | 94 | static void *default_realloc_ex(void *str, size_t num, |
ae5c8664 MC |
95 | const char *file, int line) |
96 | { | |
97 | return realloc_func(str, num); | |
98 | } | |
a5435e8b | 99 | |
ae5c8664 MC |
100 | static void *(*realloc_ex_func) (void *, size_t, const char *file, int line) |
101 | = default_realloc_ex; | |
0cd08cce | 102 | |
556c4b51 RL |
103 | #ifdef OPENSSL_SYS_VMS |
104 | static void (*free_func) (__void_ptr64) = free; | |
105 | #else | |
106 | static void (*free_func) (void *) = free; | |
107 | #endif | |
a5435e8b | 108 | |
ae5c8664 MC |
109 | static void *(*malloc_locked_func) (size_t) = malloc; |
110 | static void *default_malloc_locked_ex(size_t num, const char *file, int line) | |
111 | { | |
112 | return malloc_locked_func(num); | |
113 | } | |
65a22e8e | 114 | |
ae5c8664 MC |
115 | static void *(*malloc_locked_ex_func) (size_t, const char *file, int line) |
116 | = default_malloc_locked_ex; | |
a5435e8b | 117 | |
556c4b51 RL |
118 | #ifdef OPENSSL_SYS_VMS |
119 | static void (*free_locked_func) (__void_ptr64) = free; | |
120 | #else | |
121 | static void (*free_locked_func) (void *) = free; | |
122 | #endif | |
a5435e8b BM |
123 | |
124 | /* may be changed as long as 'allow_customize_debug' is set */ | |
0cd08cce | 125 | /* XXX use correct function pointer types */ |
f3a2a044 | 126 | #ifdef CRYPTO_MDEBUG |
65962686 | 127 | /* use default functions from mem_dbg.c */ |
ae5c8664 MC |
128 | static void (*malloc_debug_func) (void *, int, const char *, int, int) |
129 | = CRYPTO_dbg_malloc; | |
130 | static void (*realloc_debug_func) (void *, void *, int, const char *, int, | |
131 | int) | |
132 | = CRYPTO_dbg_realloc; | |
133 | static void (*free_debug_func) (void *, int) = CRYPTO_dbg_free; | |
134 | static void (*set_debug_options_func) (long) = CRYPTO_dbg_set_options; | |
135 | static long (*get_debug_options_func) (void) = CRYPTO_dbg_get_options; | |
f3a2a044 | 136 | #else |
ae5c8664 MC |
137 | /* |
138 | * applications can use CRYPTO_malloc_debug_init() to select above case at | |
139 | * run-time | |
140 | */ | |
141 | static void (*malloc_debug_func) (void *, int, const char *, int, int) = NULL; | |
142 | static void (*realloc_debug_func) (void *, void *, int, const char *, int, | |
143 | int) | |
144 | = NULL; | |
145 | static void (*free_debug_func) (void *, int) = NULL; | |
146 | static void (*set_debug_options_func) (long) = NULL; | |
147 | static long (*get_debug_options_func) (void) = NULL; | |
f3a2a044 | 148 | #endif |
9ac42ed8 | 149 | |
ae5c8664 MC |
150 | int CRYPTO_set_mem_functions(void *(*m) (size_t), void *(*r) (void *, size_t), |
151 | void (*f) (void *)) | |
152 | { | |
ae5c8664 MC |
153 | if (!allow_customize) |
154 | return 0; | |
155 | if ((m == 0) || (r == 0) || (f == 0)) | |
156 | return 0; | |
28903862 MH |
157 | /* Dummy call just to ensure OPENSSL_init() gets linked in */ |
158 | OPENSSL_init(); | |
ae5c8664 MC |
159 | malloc_func = m; |
160 | malloc_ex_func = default_malloc_ex; | |
161 | realloc_func = r; | |
162 | realloc_ex_func = default_realloc_ex; | |
163 | free_func = f; | |
164 | malloc_locked_func = m; | |
165 | malloc_locked_ex_func = default_malloc_locked_ex; | |
166 | free_locked_func = f; | |
167 | return 1; | |
168 | } | |
169 | ||
170 | int CRYPTO_set_mem_ex_functions(void *(*m) (size_t, const char *, int), | |
171 | void *(*r) (void *, size_t, const char *, | |
172 | int), void (*f) (void *)) | |
173 | { | |
174 | if (!allow_customize) | |
175 | return 0; | |
176 | if ((m == 0) || (r == 0) || (f == 0)) | |
177 | return 0; | |
178 | malloc_func = 0; | |
179 | malloc_ex_func = m; | |
180 | realloc_func = 0; | |
181 | realloc_ex_func = r; | |
182 | free_func = f; | |
183 | malloc_locked_func = 0; | |
184 | malloc_locked_ex_func = m; | |
185 | free_locked_func = f; | |
186 | return 1; | |
187 | } | |
188 | ||
189 | int CRYPTO_set_locked_mem_functions(void *(*m) (size_t), void (*f) (void *)) | |
190 | { | |
191 | if (!allow_customize) | |
192 | return 0; | |
193 | if ((m == NULL) || (f == NULL)) | |
194 | return 0; | |
195 | malloc_locked_func = m; | |
196 | malloc_locked_ex_func = default_malloc_locked_ex; | |
197 | free_locked_func = f; | |
198 | return 1; | |
199 | } | |
200 | ||
201 | int CRYPTO_set_locked_mem_ex_functions(void *(*m) (size_t, const char *, int), | |
202 | void (*f) (void *)) | |
203 | { | |
204 | if (!allow_customize) | |
205 | return 0; | |
206 | if ((m == NULL) || (f == NULL)) | |
207 | return 0; | |
208 | malloc_locked_func = 0; | |
209 | malloc_locked_ex_func = m; | |
210 | free_func = f; | |
211 | return 1; | |
212 | } | |
213 | ||
214 | int CRYPTO_set_mem_debug_functions(void (*m) | |
215 | (void *, int, const char *, int, int), | |
216 | void (*r) (void *, void *, int, | |
217 | const char *, int, int), | |
218 | void (*f) (void *, int), void (*so) (long), | |
219 | long (*go) (void)) | |
220 | { | |
221 | if (!allow_customize_debug) | |
222 | return 0; | |
223 | OPENSSL_init(); | |
224 | malloc_debug_func = m; | |
225 | realloc_debug_func = r; | |
226 | free_debug_func = f; | |
227 | set_debug_options_func = so; | |
228 | get_debug_options_func = go; | |
229 | return 1; | |
230 | } | |
231 | ||
232 | void CRYPTO_get_mem_functions(void *(**m) (size_t), | |
233 | void *(**r) (void *, size_t), | |
234 | void (**f) (void *)) | |
235 | { | |
236 | if (m != NULL) | |
237 | *m = (malloc_ex_func == default_malloc_ex) ? malloc_func : 0; | |
238 | if (r != NULL) | |
239 | *r = (realloc_ex_func == default_realloc_ex) ? realloc_func : 0; | |
240 | if (f != NULL) | |
241 | *f = free_func; | |
242 | } | |
243 | ||
244 | void CRYPTO_get_mem_ex_functions(void *(**m) (size_t, const char *, int), | |
245 | void *(**r) (void *, size_t, const char *, | |
246 | int), void (**f) (void *)) | |
247 | { | |
248 | if (m != NULL) | |
249 | *m = (malloc_ex_func != default_malloc_ex) ? malloc_ex_func : 0; | |
250 | if (r != NULL) | |
251 | *r = (realloc_ex_func != default_realloc_ex) ? realloc_ex_func : 0; | |
252 | if (f != NULL) | |
253 | *f = free_func; | |
254 | } | |
255 | ||
256 | void CRYPTO_get_locked_mem_functions(void *(**m) (size_t), | |
257 | void (**f) (void *)) | |
258 | { | |
259 | if (m != NULL) | |
260 | *m = (malloc_locked_ex_func == default_malloc_locked_ex) ? | |
261 | malloc_locked_func : 0; | |
262 | if (f != NULL) | |
263 | *f = free_locked_func; | |
264 | } | |
265 | ||
266 | void CRYPTO_get_locked_mem_ex_functions(void | |
267 | *(**m) (size_t, const char *, int), | |
268 | void (**f) (void *)) | |
269 | { | |
270 | if (m != NULL) | |
271 | *m = (malloc_locked_ex_func != default_malloc_locked_ex) ? | |
272 | malloc_locked_ex_func : 0; | |
273 | if (f != NULL) | |
274 | *f = free_locked_func; | |
275 | } | |
276 | ||
277 | void CRYPTO_get_mem_debug_functions(void (**m) | |
278 | (void *, int, const char *, int, int), | |
279 | void (**r) (void *, void *, int, | |
280 | const char *, int, int), | |
281 | void (**f) (void *, int), | |
282 | void (**so) (long), long (**go) (void)) | |
283 | { | |
284 | if (m != NULL) | |
285 | *m = malloc_debug_func; | |
286 | if (r != NULL) | |
287 | *r = realloc_debug_func; | |
288 | if (f != NULL) | |
289 | *f = free_debug_func; | |
290 | if (so != NULL) | |
291 | *so = set_debug_options_func; | |
292 | if (go != NULL) | |
293 | *go = get_debug_options_func; | |
294 | } | |
d02b48c6 | 295 | |
6343829a | 296 | void *CRYPTO_malloc_locked(int num, const char *file, int line) |
ae5c8664 MC |
297 | { |
298 | void *ret = NULL; | |
299 | ||
300 | if (num <= 0) | |
301 | return NULL; | |
302 | ||
303 | if (allow_customize) | |
304 | allow_customize = 0; | |
305 | if (malloc_debug_func != NULL) { | |
306 | if (allow_customize_debug) | |
307 | allow_customize_debug = 0; | |
308 | malloc_debug_func(NULL, num, file, line, 0); | |
309 | } | |
310 | ret = malloc_locked_ex_func(num, file, line); | |
8d28d5f8 | 311 | #ifdef LEVITTE_DEBUG_MEM |
ae5c8664 | 312 | fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num); |
3dff94c2 | 313 | #endif |
ae5c8664 MC |
314 | if (malloc_debug_func != NULL) |
315 | malloc_debug_func(ret, num, file, line, 1); | |
1f575f1b | 316 | |
ae5c8664 MC |
317 | return ret; |
318 | } | |
d02b48c6 | 319 | |
9ac42ed8 | 320 | void CRYPTO_free_locked(void *str) |
ae5c8664 MC |
321 | { |
322 | if (free_debug_func != NULL) | |
323 | free_debug_func(str, 0); | |
8d28d5f8 | 324 | #ifdef LEVITTE_DEBUG_MEM |
ae5c8664 | 325 | fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str); |
9ac42ed8 | 326 | #endif |
ae5c8664 MC |
327 | free_locked_func(str); |
328 | if (free_debug_func != NULL) | |
329 | free_debug_func(NULL, 1); | |
330 | } | |
d02b48c6 | 331 | |
6343829a | 332 | void *CRYPTO_malloc(int num, const char *file, int line) |
ae5c8664 MC |
333 | { |
334 | void *ret = NULL; | |
335 | ||
336 | if (num <= 0) | |
337 | return NULL; | |
338 | ||
339 | if (allow_customize) | |
340 | allow_customize = 0; | |
341 | if (malloc_debug_func != NULL) { | |
342 | if (allow_customize_debug) | |
343 | allow_customize_debug = 0; | |
344 | malloc_debug_func(NULL, num, file, line, 0); | |
345 | } | |
346 | ret = malloc_ex_func(num, file, line); | |
8d28d5f8 | 347 | #ifdef LEVITTE_DEBUG_MEM |
ae5c8664 | 348 | fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num); |
9ac42ed8 | 349 | #endif |
ae5c8664 MC |
350 | if (malloc_debug_func != NULL) |
351 | malloc_debug_func(ret, num, file, line, 1); | |
d02b48c6 | 352 | |
ae5c8664 MC |
353 | return ret; |
354 | } | |
355 | ||
6caa4edd | 356 | char *CRYPTO_strdup(const char *str, const char *file, int line) |
ae5c8664 MC |
357 | { |
358 | char *ret = CRYPTO_malloc(strlen(str) + 1, file, line); | |
6caa4edd | 359 | |
6e5d1307 LV |
360 | if (ret == NULL) |
361 | return NULL; | |
362 | ||
ae5c8664 MC |
363 | strcpy(ret, str); |
364 | return ret; | |
365 | } | |
d02b48c6 | 366 | |
6343829a | 367 | void *CRYPTO_realloc(void *str, int num, const char *file, int line) |
ae5c8664 MC |
368 | { |
369 | void *ret = NULL; | |
d02b48c6 | 370 | |
ae5c8664 MC |
371 | if (str == NULL) |
372 | return CRYPTO_malloc(num, file, line); | |
d5234c7b | 373 | |
ae5c8664 MC |
374 | if (num <= 0) |
375 | return NULL; | |
d5234c7b | 376 | |
ae5c8664 MC |
377 | if (realloc_debug_func != NULL) |
378 | realloc_debug_func(str, NULL, num, file, line, 0); | |
379 | ret = realloc_ex_func(str, num, file, line); | |
8d28d5f8 | 380 | #ifdef LEVITTE_DEBUG_MEM |
ae5c8664 MC |
381 | fprintf(stderr, "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n", str, |
382 | ret, num); | |
1f575f1b | 383 | #endif |
ae5c8664 MC |
384 | if (realloc_debug_func != NULL) |
385 | realloc_debug_func(str, ret, num, file, line, 1); | |
9ac42ed8 | 386 | |
ae5c8664 MC |
387 | return ret; |
388 | } | |
d02b48c6 | 389 | |
6343829a | 390 | void *CRYPTO_realloc_clean(void *str, int old_len, int num, const char *file, |
ae5c8664 MC |
391 | int line) |
392 | { | |
393 | void *ret = NULL; | |
394 | ||
395 | if (str == NULL) | |
396 | return CRYPTO_malloc(num, file, line); | |
397 | ||
398 | if (num <= 0) | |
399 | return NULL; | |
400 | ||
401 | /* | |
402 | * We don't support shrinking the buffer. Note the memcpy that copies | |
403 | * |old_len| bytes to the new buffer, below. | |
404 | */ | |
405 | if (num < old_len) | |
406 | return NULL; | |
407 | ||
408 | if (realloc_debug_func != NULL) | |
409 | realloc_debug_func(str, NULL, num, file, line, 0); | |
410 | ret = malloc_ex_func(num, file, line); | |
411 | if (ret) { | |
412 | memcpy(ret, str, old_len); | |
413 | OPENSSL_cleanse(str, old_len); | |
414 | free_func(str); | |
415 | } | |
54a656ef | 416 | #ifdef LEVITTE_DEBUG_MEM |
ae5c8664 MC |
417 | fprintf(stderr, |
418 | "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n", | |
419 | str, ret, num); | |
54a656ef | 420 | #endif |
ae5c8664 MC |
421 | if (realloc_debug_func != NULL) |
422 | realloc_debug_func(str, ret, num, file, line, 1); | |
54a656ef | 423 | |
ae5c8664 MC |
424 | return ret; |
425 | } | |
54a656ef | 426 | |
9ac42ed8 | 427 | void CRYPTO_free(void *str) |
ae5c8664 MC |
428 | { |
429 | if (free_debug_func != NULL) | |
430 | free_debug_func(str, 0); | |
8d28d5f8 | 431 | #ifdef LEVITTE_DEBUG_MEM |
ae5c8664 | 432 | fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str); |
dfeab068 | 433 | #endif |
ae5c8664 MC |
434 | free_func(str); |
435 | if (free_debug_func != NULL) | |
436 | free_debug_func(NULL, 1); | |
437 | } | |
d02b48c6 | 438 | |
6343829a | 439 | void *CRYPTO_remalloc(void *a, int num, const char *file, int line) |
ae5c8664 MC |
440 | { |
441 | if (a != NULL) | |
442 | OPENSSL_free(a); | |
443 | a = (char *)OPENSSL_malloc(num); | |
444 | return (a); | |
445 | } | |
d02b48c6 | 446 | |
0cd08cce | 447 | void CRYPTO_set_mem_debug_options(long bits) |
ae5c8664 MC |
448 | { |
449 | if (set_debug_options_func != NULL) | |
450 | set_debug_options_func(bits); | |
451 | } | |
d02b48c6 | 452 | |
667ac4ec | 453 | long CRYPTO_get_mem_debug_options(void) |
ae5c8664 MC |
454 | { |
455 | if (get_debug_options_func != NULL) | |
456 | return get_debug_options_func(); | |
457 | return 0; | |
458 | } |