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>
65 static int allow_customize = 1; /* we provide flexible functions for */
66 static int allow_customize_debug = 1;/* exchanging memory-related functions at
67 * run-time, but this must be done
68 * before any blocks are actually
69 * allocated; or we'll run into huge
70 * problems when malloc/free pairs
75 /* the following pointers may be changed as long as 'allow_customize' is set */
77 static void *(*malloc_func)(size_t) = malloc;
78 static void *default_malloc_ex(size_t num, const char *file, int line)
79 { return malloc_func(num); }
80 static void *(*malloc_ex_func)(size_t, const char *file, int line)
83 static void *(*realloc_func)(void *, size_t)= realloc;
84 static void *default_realloc_ex(void *str, size_t num,
85 const char *file, int line)
86 { return realloc_func(str,num); }
87 static void *(*realloc_ex_func)(void *, size_t, const char *file, int line)
90 static void (*free_func)(void *) = free;
92 static void *(*malloc_locked_func)(size_t) = malloc;
93 static void *default_malloc_locked_ex(size_t num, const char *file, int line)
94 { return malloc_locked_func(num); }
95 static void *(*malloc_locked_ex_func)(size_t, const char *file, int line)
96 = default_malloc_locked_ex;
98 static void (*free_locked_func)(void *) = free;
102 /* may be changed as long as 'allow_customize_debug' is set */
103 /* XXX use correct function pointer types */
105 /* use default functions from mem_dbg.c */
106 static void (*malloc_debug_func)(void *,int,const char *,int,int)
108 static void (*realloc_debug_func)(void *,void *,int,const char *,int,int)
109 = CRYPTO_dbg_realloc;
110 static void (*free_debug_func)(void *,int) = CRYPTO_dbg_free;
111 static void (*set_debug_options_func)(long) = CRYPTO_dbg_set_options;
112 static long (*get_debug_options_func)(void) = CRYPTO_dbg_get_options;
114 /* applications can use CRYPTO_malloc_debug_init() to select above case
116 static void (*malloc_debug_func)(void *,int,const char *,int,int) = NULL;
117 static void (*realloc_debug_func)(void *,void *,int,const char *,int,int)
119 static void (*free_debug_func)(void *,int) = NULL;
120 static void (*set_debug_options_func)(long) = NULL;
121 static long (*get_debug_options_func)(void) = NULL;
124 int CRYPTO_set_mem_functions(void *(*m)(size_t), void *(*r)(void *, size_t),
127 /* Dummy call just to ensure OPENSSL_init() gets linked in */
129 if (!allow_customize)
131 if ((m == 0) || (r == 0) || (f == 0))
133 malloc_func=m; malloc_ex_func=default_malloc_ex;
134 realloc_func=r; realloc_ex_func=default_realloc_ex;
136 malloc_locked_func=m; malloc_locked_ex_func=default_malloc_locked_ex;
141 int CRYPTO_set_mem_ex_functions(
142 void *(*m)(size_t,const char *,int),
143 void *(*r)(void *, size_t,const char *,int),
146 if (!allow_customize)
148 if ((m == 0) || (r == 0) || (f == 0))
150 malloc_func=0; malloc_ex_func=m;
151 realloc_func=0; realloc_ex_func=r;
153 malloc_locked_func=0; malloc_locked_ex_func=m;
158 int CRYPTO_set_locked_mem_functions(void *(*m)(size_t), void (*f)(void *))
160 if (!allow_customize)
162 if ((m == NULL) || (f == NULL))
164 malloc_locked_func=m; malloc_locked_ex_func=default_malloc_locked_ex;
169 int CRYPTO_set_locked_mem_ex_functions(
170 void *(*m)(size_t,const char *,int),
173 if (!allow_customize)
175 if ((m == NULL) || (f == NULL))
177 malloc_locked_func=0; malloc_locked_ex_func=m;
182 int CRYPTO_set_mem_debug_functions(void (*m)(void *,int,const char *,int,int),
183 void (*r)(void *,void *,int,const char *,int,int),
184 void (*f)(void *,int),
188 if (!allow_customize_debug)
192 realloc_debug_func=r;
194 set_debug_options_func=so;
195 get_debug_options_func=go;
200 void CRYPTO_get_mem_functions(void *(**m)(size_t), void *(**r)(void *, size_t),
203 if (m != NULL) *m = (malloc_ex_func == default_malloc_ex) ?
205 if (r != NULL) *r = (realloc_ex_func == default_realloc_ex) ?
207 if (f != NULL) *f=free_func;
210 void CRYPTO_get_mem_ex_functions(
211 void *(**m)(size_t,const char *,int),
212 void *(**r)(void *, size_t,const char *,int),
215 if (m != NULL) *m = (malloc_ex_func != default_malloc_ex) ?
217 if (r != NULL) *r = (realloc_ex_func != default_realloc_ex) ?
219 if (f != NULL) *f=free_func;
222 void CRYPTO_get_locked_mem_functions(void *(**m)(size_t), void (**f)(void *))
224 if (m != NULL) *m = (malloc_locked_ex_func == default_malloc_locked_ex) ?
225 malloc_locked_func : 0;
226 if (f != NULL) *f=free_locked_func;
229 void CRYPTO_get_locked_mem_ex_functions(
230 void *(**m)(size_t,const char *,int),
233 if (m != NULL) *m = (malloc_locked_ex_func != default_malloc_locked_ex) ?
234 malloc_locked_ex_func : 0;
235 if (f != NULL) *f=free_locked_func;
238 void CRYPTO_get_mem_debug_functions(void (**m)(void *,int,const char *,int,int),
239 void (**r)(void *,void *,int,const char *,int,int),
240 void (**f)(void *,int),
244 if (m != NULL) *m=malloc_debug_func;
245 if (r != NULL) *r=realloc_debug_func;
246 if (f != NULL) *f=free_debug_func;
247 if (so != NULL) *so=set_debug_options_func;
248 if (go != NULL) *go=get_debug_options_func;
252 void *CRYPTO_malloc_locked(int num, const char *file, int line)
256 if (num <= 0) return NULL;
260 if (malloc_debug_func != NULL)
262 if(allow_customize_debug)
263 allow_customize_debug = 0;
264 malloc_debug_func(NULL, num, file, line, 0);
266 ret = malloc_locked_ex_func(num,file,line);
267 #ifdef LEVITTE_DEBUG_MEM
268 fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num);
270 if (malloc_debug_func != NULL)
271 malloc_debug_func(ret, num, file, line, 1);
273 #ifndef OPENSSL_CPUID_OBJ
274 /* Create a dependency on the value of 'cleanse_ctr' so our memory
275 * sanitisation function can't be optimised out. NB: We only do
276 * this for >2Kb so the overhead doesn't bother us. */
277 if(ret && (num > 2048))
278 { extern unsigned char cleanse_ctr;
279 ((unsigned char *)ret)[0] = cleanse_ctr;
286 void CRYPTO_free_locked(void *str)
288 if (free_debug_func != NULL)
289 free_debug_func(str, 0);
290 #ifdef LEVITTE_DEBUG_MEM
291 fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str);
293 free_locked_func(str);
294 if (free_debug_func != NULL)
295 free_debug_func(NULL, 1);
298 void *CRYPTO_malloc(int num, const char *file, int line)
302 if (num <= 0) return NULL;
306 if (malloc_debug_func != NULL)
308 if(allow_customize_debug)
309 allow_customize_debug = 0;
310 malloc_debug_func(NULL, num, file, line, 0);
312 ret = malloc_ex_func(num,file,line);
313 #ifdef LEVITTE_DEBUG_MEM
314 fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num);
316 if (malloc_debug_func != NULL)
317 malloc_debug_func(ret, num, file, line, 1);
319 #ifndef OPENSSL_CPUID_OBJ
320 /* Create a dependency on the value of 'cleanse_ctr' so our memory
321 * sanitisation function can't be optimised out. NB: We only do
322 * this for >2Kb so the overhead doesn't bother us. */
323 if(ret && (num > 2048))
324 { extern unsigned char cleanse_ctr;
325 ((unsigned char *)ret)[0] = cleanse_ctr;
331 char *CRYPTO_strdup(const char *str, const char *file, int line)
333 char *ret = CRYPTO_malloc(strlen(str)+1, file, line);
339 void *CRYPTO_realloc(void *str, int num, const char *file, int line)
344 return CRYPTO_malloc(num, file, line);
346 if (num <= 0) return NULL;
348 if (realloc_debug_func != NULL)
349 realloc_debug_func(str, NULL, num, file, line, 0);
350 ret = realloc_ex_func(str,num,file,line);
351 #ifdef LEVITTE_DEBUG_MEM
352 fprintf(stderr, "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n", str, ret, num);
354 if (realloc_debug_func != NULL)
355 realloc_debug_func(str, ret, num, file, line, 1);
360 void *CRYPTO_realloc_clean(void *str, int old_len, int num, const char *file,
366 return CRYPTO_malloc(num, file, line);
368 if (num <= 0) return NULL;
370 /* We don't support shrinking the buffer. Note the memcpy that copies
371 * |old_len| bytes to the new buffer, below. */
372 if (num < old_len) return NULL;
374 if (realloc_debug_func != NULL)
375 realloc_debug_func(str, NULL, num, file, line, 0);
376 ret=malloc_ex_func(num,file,line);
379 memcpy(ret,str,old_len);
380 OPENSSL_cleanse(str,old_len);
383 #ifdef LEVITTE_DEBUG_MEM
385 "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n",
388 if (realloc_debug_func != NULL)
389 realloc_debug_func(str, ret, num, file, line, 1);
394 void CRYPTO_free(void *str)
396 if (free_debug_func != NULL)
397 free_debug_func(str, 0);
398 #ifdef LEVITTE_DEBUG_MEM
399 fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str);
402 if (free_debug_func != NULL)
403 free_debug_func(NULL, 1);
406 void *CRYPTO_remalloc(void *a, int num, const char *file, int line)
408 if (a != NULL) OPENSSL_free(a);
409 a=(char *)OPENSSL_malloc(num);
413 void CRYPTO_set_mem_debug_options(long bits)
415 if (set_debug_options_func != NULL)
416 set_debug_options_func(bits);
419 long CRYPTO_get_mem_debug_options(void)
421 if (get_debug_options_func != NULL)
422 return get_debug_options_func();