2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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 :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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
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.]
61 #include <openssl/crypto.h>
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
73 * the following pointers may be changed as long as 'allow_customize' is set
76 static void *(*malloc_func) (size_t) = malloc;
77 static void *default_malloc_ex(size_t num, const char *file, int line)
79 return malloc_func(num);
82 static void *(*malloc_ex_func) (size_t, const char *file, int line)
85 static void *(*realloc_func) (void *, size_t) = realloc;
86 static void *default_realloc_ex(void *str, size_t num,
87 const char *file, int line)
89 return realloc_func(str, num);
92 static void *(*realloc_ex_func) (void *, size_t, const char *file, int line)
95 static void (*free_func) (void *) = free;
97 static void *(*malloc_locked_func) (size_t) = malloc;
98 static void *default_malloc_locked_ex(size_t num, const char *file, int line)
100 return malloc_locked_func(num);
103 static void *(*malloc_locked_ex_func) (size_t, const char *file, int line)
104 = default_malloc_locked_ex;
106 static void (*free_locked_func) (void *) = free;
108 /* may be changed as long as 'allow_customize_debug' is set */
109 /* XXX use correct function pointer types */
111 /* use default functions from mem_dbg.c */
112 static void (*malloc_debug_func) (void *, int, const char *, int, int)
114 static void (*realloc_debug_func) (void *, void *, int, const char *, 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;
122 * applications can use CRYPTO_malloc_debug_init() to select above case at
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,
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;
134 int CRYPTO_set_mem_functions(void *(*m) (size_t), void *(*r) (void *, size_t),
137 /* Dummy call just to ensure OPENSSL_init() gets linked in */
139 if (!allow_customize)
141 if ((m == 0) || (r == 0) || (f == 0))
144 malloc_ex_func = default_malloc_ex;
146 realloc_ex_func = default_realloc_ex;
148 malloc_locked_func = m;
149 malloc_locked_ex_func = default_malloc_locked_ex;
150 free_locked_func = f;
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 *))
158 if (!allow_customize)
160 if ((m == 0) || (r == 0) || (f == 0))
167 malloc_locked_func = 0;
168 malloc_locked_ex_func = m;
169 free_locked_func = f;
173 int CRYPTO_set_locked_mem_functions(void *(*m) (size_t), void (*f) (void *))
175 if (!allow_customize)
177 if ((m == NULL) || (f == NULL))
179 malloc_locked_func = m;
180 malloc_locked_ex_func = default_malloc_locked_ex;
181 free_locked_func = f;
185 int CRYPTO_set_locked_mem_ex_functions(void *(*m) (size_t, const char *, int),
188 if (!allow_customize)
190 if ((m == NULL) || (f == NULL))
192 malloc_locked_func = 0;
193 malloc_locked_ex_func = m;
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),
205 if (!allow_customize_debug)
208 malloc_debug_func = m;
209 realloc_debug_func = r;
211 set_debug_options_func = so;
212 get_debug_options_func = go;
216 void CRYPTO_get_mem_functions(void *(**m) (size_t),
217 void *(**r) (void *, size_t),
221 *m = (malloc_ex_func == default_malloc_ex) ? malloc_func : 0;
223 *r = (realloc_ex_func == default_realloc_ex) ? realloc_func : 0;
228 void CRYPTO_get_mem_ex_functions(void *(**m) (size_t, const char *, int),
229 void *(**r) (void *, size_t, const char *,
230 int), void (**f) (void *))
233 *m = (malloc_ex_func != default_malloc_ex) ? malloc_ex_func : 0;
235 *r = (realloc_ex_func != default_realloc_ex) ? realloc_ex_func : 0;
240 void CRYPTO_get_locked_mem_functions(void *(**m) (size_t),
244 *m = (malloc_locked_ex_func == default_malloc_locked_ex) ?
245 malloc_locked_func : 0;
247 *f = free_locked_func;
250 void CRYPTO_get_locked_mem_ex_functions(void
251 *(**m) (size_t, const char *, int),
255 *m = (malloc_locked_ex_func != default_malloc_locked_ex) ?
256 malloc_locked_ex_func : 0;
258 *f = free_locked_func;
261 void CRYPTO_get_mem_debug_functions(void (**m)
262 (void *, int, const char *, int, int),
263 void (**r) (void *, void *, int,
264 const char *, int, int),
265 void (**f) (void *, int),
266 void (**so) (long), long (**go) (void))
269 *m = malloc_debug_func;
271 *r = realloc_debug_func;
273 *f = free_debug_func;
275 *so = set_debug_options_func;
277 *go = get_debug_options_func;
280 void *CRYPTO_malloc_locked(int num, const char *file, int line)
289 if (malloc_debug_func != NULL) {
290 if (allow_customize_debug)
291 allow_customize_debug = 0;
292 malloc_debug_func(NULL, num, file, line, 0);
294 ret = malloc_locked_ex_func(num, file, line);
295 #ifdef LEVITTE_DEBUG_MEM
296 fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num);
298 if (malloc_debug_func != NULL)
299 malloc_debug_func(ret, num, file, line, 1);
301 #ifndef OPENSSL_CPUID_OBJ
303 * Create a dependency on the value of 'cleanse_ctr' so our memory
304 * sanitisation function can't be optimised out. NB: We only do this for
305 * >2Kb so the overhead doesn't bother us.
307 if (ret && (num > 2048)) {
308 extern unsigned char cleanse_ctr;
309 ((unsigned char *)ret)[0] = cleanse_ctr;
316 void CRYPTO_free_locked(void *str)
318 if (free_debug_func != NULL)
319 free_debug_func(str, 0);
320 #ifdef LEVITTE_DEBUG_MEM
321 fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str);
323 free_locked_func(str);
324 if (free_debug_func != NULL)
325 free_debug_func(NULL, 1);
328 void *CRYPTO_malloc(int num, const char *file, int line)
337 if (malloc_debug_func != NULL) {
338 if (allow_customize_debug)
339 allow_customize_debug = 0;
340 malloc_debug_func(NULL, num, file, line, 0);
342 ret = malloc_ex_func(num, file, line);
343 #ifdef LEVITTE_DEBUG_MEM
344 fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num);
346 if (malloc_debug_func != NULL)
347 malloc_debug_func(ret, num, file, line, 1);
349 #ifndef OPENSSL_CPUID_OBJ
351 * Create a dependency on the value of 'cleanse_ctr' so our memory
352 * sanitisation function can't be optimised out. NB: We only do this for
353 * >2Kb so the overhead doesn't bother us.
355 if (ret && (num > 2048)) {
356 extern unsigned char cleanse_ctr;
357 ((unsigned char *)ret)[0] = cleanse_ctr;
364 char *CRYPTO_strdup(const char *str, const char *file, int line)
366 char *ret = CRYPTO_malloc(strlen(str) + 1, file, line);
375 void *CRYPTO_realloc(void *str, int num, const char *file, int line)
380 return CRYPTO_malloc(num, file, line);
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);
388 #ifdef LEVITTE_DEBUG_MEM
389 fprintf(stderr, "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n", str,
392 if (realloc_debug_func != NULL)
393 realloc_debug_func(str, ret, num, file, line, 1);
398 void *CRYPTO_realloc_clean(void *str, int old_len, int num, const char *file,
404 return CRYPTO_malloc(num, file, line);
410 * We don't support shrinking the buffer. Note the memcpy that copies
411 * |old_len| bytes to the new buffer, below.
416 if (realloc_debug_func != NULL)
417 realloc_debug_func(str, NULL, num, file, line, 0);
418 ret = malloc_ex_func(num, file, line);
420 memcpy(ret, str, old_len);
421 OPENSSL_cleanse(str, old_len);
424 #ifdef LEVITTE_DEBUG_MEM
426 "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n",
429 if (realloc_debug_func != NULL)
430 realloc_debug_func(str, ret, num, file, line, 1);
435 void CRYPTO_free(void *str)
437 if (free_debug_func != NULL)
438 free_debug_func(str, 0);
439 #ifdef LEVITTE_DEBUG_MEM
440 fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str);
443 if (free_debug_func != NULL)
444 free_debug_func(NULL, 1);
447 void *CRYPTO_remalloc(void *a, int num, const char *file, int line)
451 a = (char *)OPENSSL_malloc(num);
455 void CRYPTO_set_mem_debug_options(long bits)
457 if (set_debug_options_func != NULL)
458 set_debug_options_func(bits);
461 long CRYPTO_get_mem_debug_options(void)
463 if (get_debug_options_func != NULL)
464 return get_debug_options_func();