1 /* crypto/mem.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 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 (at) cryptsoft.com). 15 * 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. 22 * 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 (at) 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 (at) cryptsoft.com)" 40 * 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. 52 * 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> 61 #include <openssl/crypto.h> 62 #include "cryptlib.h" 63 64 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 71 * don't match etc. */ 72 73 74 75 /* the following pointers may be changed as long as 'allow_customize' is set */ 76 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) 81 = default_malloc_ex; 82 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) 88 = default_realloc_ex; 89 90 static void (*free_func)(void *) = free; 91 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; 97 98 static void (*free_locked_func)(void *) = free; 99 100 101 102 /* may be changed as long as 'allow_customize_debug' is set */ 103 /* XXX use correct function pointer types */ 104 #if defined(CRYPTO_MDEBUG) && !defined(OPENSSL_FIPS) 105 /* use default functions from mem_dbg.c */ 106 static void (*malloc_debug_func)(void *,int,const char *,int,int) 107 = CRYPTO_dbg_malloc; 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; 113 114 static int (*push_info_func)(const char *info, const char *file, int line) 115 = CRYPTO_dbg_push_info; 116 static int (*pop_info_func)(void) 117 = CRYPTO_dbg_pop_info; 118 static int (*remove_all_info_func)(void) 119 = CRYPTO_dbg_remove_all_info; 120 121 #else 122 /* applications can use CRYPTO_malloc_debug_init() to select above case 123 * at run-time */ 124 static void (*malloc_debug_func)(void *,int,const char *,int,int) = NULL; 125 static void (*realloc_debug_func)(void *,void *,int,const char *,int,int) 126 = NULL; 127 static void (*free_debug_func)(void *,int) = NULL; 128 static void (*set_debug_options_func)(long) = NULL; 129 static long (*get_debug_options_func)(void) = NULL; 130 131 132 static int (*push_info_func)(const char *info, const char *file, int line) 133 = NULL; 134 static int (*pop_info_func)(void) = NULL; 135 static int (*remove_all_info_func)(void) = NULL; 136 137 #endif 138 139 140 int CRYPTO_set_mem_functions(void *(*m)(size_t), void *(*r)(void *, size_t), 141 void (*f)(void *)) 142 { 143 if (!allow_customize) 144 return 0; 145 if ((m == 0) || (r == 0) || (f == 0)) 146 return 0; 147 malloc_func=m; malloc_ex_func=default_malloc_ex; 148 realloc_func=r; realloc_ex_func=default_realloc_ex; 149 free_func=f; 150 malloc_locked_func=m; malloc_locked_ex_func=default_malloc_locked_ex; 151 free_locked_func=f; 152 return 1; 153 } 154 155 int CRYPTO_set_mem_ex_functions( 156 void *(*m)(size_t,const char *,int), 157 void *(*r)(void *, size_t,const char *,int), 158 void (*f)(void *)) 159 { 160 if (!allow_customize) 161 return 0; 162 if ((m == 0) || (r == 0) || (f == 0)) 163 return 0; 164 malloc_func=0; malloc_ex_func=m; 165 realloc_func=0; realloc_ex_func=r; 166 free_func=f; 167 malloc_locked_func=0; malloc_locked_ex_func=m; 168 free_locked_func=f; 169 return 1; 170 } 171 172 int CRYPTO_set_locked_mem_functions(void *(*m)(size_t), void (*f)(void *)) 173 { 174 if (!allow_customize) 175 return 0; 176 if ((m == NULL) || (f == NULL)) 177 return 0; 178 malloc_locked_func=m; malloc_locked_ex_func=default_malloc_locked_ex; 179 free_locked_func=f; 180 return 1; 181 } 182 183 int CRYPTO_set_locked_mem_ex_functions( 184 void *(*m)(size_t,const char *,int), 185 void (*f)(void *)) 186 { 187 if (!allow_customize) 188 return 0; 189 if ((m == NULL) || (f == NULL)) 190 return 0; 191 malloc_locked_func=0; malloc_locked_ex_func=m; 192 free_func=f; 193 return 1; 194 } 195 196 int CRYPTO_set_mem_debug_functions(void (*m)(void *,int,const char *,int,int), 197 void (*r)(void *,void *,int,const char *,int,int), 198 void (*f)(void *,int), 199 void (*so)(long), 200 long (*go)(void)) 201 { 202 if (!allow_customize_debug) 203 return 0; 204 malloc_debug_func=m; 205 realloc_debug_func=r; 206 free_debug_func=f; 207 set_debug_options_func=so; 208 get_debug_options_func=go; 209 return 1; 210 } 211 212 void CRYPTO_set_mem_info_functions( 213 int (*push_info_fn)(const char *info, const char *file, int line), 214 int (*pop_info_fn)(void), 215 int (*remove_all_info_fn)(void)) 216 { 217 push_info_func = push_info_fn; 218 pop_info_func = pop_info_fn; 219 remove_all_info_func = remove_all_info_fn; 220 } 221 222 void CRYPTO_get_mem_functions(void *(**m)(size_t), void *(**r)(void *, size_t), 223 void (**f)(void *)) 224 { 225 if (m != NULL) *m = (malloc_ex_func == default_malloc_ex) ? 226 malloc_func : 0; 227 if (r != NULL) *r = (realloc_ex_func == default_realloc_ex) ? 228 realloc_func : 0; 229 if (f != NULL) *f=free_func; 230 } 231 232 void CRYPTO_get_mem_ex_functions( 233 void *(**m)(size_t,const char *,int), 234 void *(**r)(void *, size_t,const char *,int), 235 void (**f)(void *)) 236 { 237 if (m != NULL) *m = (malloc_ex_func != default_malloc_ex) ? 238 malloc_ex_func : 0; 239 if (r != NULL) *r = (realloc_ex_func != default_realloc_ex) ? 240 realloc_ex_func : 0; 241 if (f != NULL) *f=free_func; 242 } 243 244 void CRYPTO_get_locked_mem_functions(void *(**m)(size_t), void (**f)(void *)) 245 { 246 if (m != NULL) *m = (malloc_locked_ex_func == default_malloc_locked_ex) ? 247 malloc_locked_func : 0; 248 if (f != NULL) *f=free_locked_func; 249 } 250 251 void CRYPTO_get_locked_mem_ex_functions( 252 void *(**m)(size_t,const char *,int), 253 void (**f)(void *)) 254 { 255 if (m != NULL) *m = (malloc_locked_ex_func != default_malloc_locked_ex) ? 256 malloc_locked_ex_func : 0; 257 if (f != NULL) *f=free_locked_func; 258 } 259 260 void CRYPTO_get_mem_debug_functions(void (**m)(void *,int,const char *,int,int), 261 void (**r)(void *,void *,int,const char *,int,int), 262 void (**f)(void *,int), 263 void (**so)(long), 264 long (**go)(void)) 265 { 266 if (m != NULL) *m=malloc_debug_func; 267 if (r != NULL) *r=realloc_debug_func; 268 if (f != NULL) *f=free_debug_func; 269 if (so != NULL) *so=set_debug_options_func; 270 if (go != NULL) *go=get_debug_options_func; 271 } 272 273 274 void *CRYPTO_malloc_locked(int num, const char *file, int line) 275 { 276 void *ret = NULL; 277 extern unsigned char cleanse_ctr; 278 279 if (num <= 0) return NULL; 280 281 allow_customize = 0; 282 if (malloc_debug_func != NULL) 283 { 284 allow_customize_debug = 0; 285 malloc_debug_func(NULL, num, file, line, 0); 286 } 287 ret = malloc_locked_ex_func(num,file,line); 288 #ifdef LEVITTE_DEBUG_MEM 289 fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num); 290 #endif 291 if (malloc_debug_func != NULL) 292 malloc_debug_func(ret, num, file, line, 1); 293 294 /* Create a dependency on the value of 'cleanse_ctr' so our memory 295 * sanitisation function can't be optimised out. NB: We only do 296 * this for >2Kb so the overhead doesn't bother us. */ 297 if(ret && (num > 2048)) 298 ((unsigned char *)ret)[0] = cleanse_ctr; 299 300 return ret; 301 } 302 303 void CRYPTO_free_locked(void *str) 304 { 305 if (free_debug_func != NULL) 306 free_debug_func(str, 0); 307 #ifdef LEVITTE_DEBUG_MEM 308 fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str); 309 #endif 310 free_locked_func(str); 311 if (free_debug_func != NULL) 312 free_debug_func(NULL, 1); 313 } 314 315 void *CRYPTO_malloc(int num, const char *file, int line) 316 { 317 void *ret = NULL; 318 extern unsigned char cleanse_ctr; 319 320 if (num <= 0) return NULL; 321 322 allow_customize = 0; 323 if (malloc_debug_func != NULL) 324 { 325 allow_customize_debug = 0; 326 malloc_debug_func(NULL, num, file, line, 0); 327 } 328 ret = malloc_ex_func(num,file,line); 329 #ifdef LEVITTE_DEBUG_MEM 330 fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num); 331 #endif 332 if (malloc_debug_func != NULL) 333 malloc_debug_func(ret, num, file, line, 1); 334 335 /* Create a dependency on the value of 'cleanse_ctr' so our memory 336 * sanitisation function can't be optimised out. NB: We only do 337 * this for >2Kb so the overhead doesn't bother us. */ 338 if(ret && (num > 2048)) 339 ((unsigned char *)ret)[0] = cleanse_ctr; 340 341 return ret; 342 } 343 344 void *CRYPTO_realloc(void *str, int num, const char *file, int line) 345 { 346 void *ret = NULL; 347 348 if (str == NULL) 349 return CRYPTO_malloc(num, file, line); 350 351 if (num <= 0) return NULL; 352 353 if (realloc_debug_func != NULL) 354 realloc_debug_func(str, NULL, num, file, line, 0); 355 ret = realloc_ex_func(str,num,file,line); 356 #ifdef LEVITTE_DEBUG_MEM 357 fprintf(stderr, "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n", str, ret, num); 358 #endif 359 if (realloc_debug_func != NULL) 360 realloc_debug_func(str, ret, num, file, line, 1); 361 362 return ret; 363 } 364 365 void *CRYPTO_realloc_clean(void *str, int old_len, int num, const char *file, 366 int line) 367 { 368 void *ret = NULL; 369 370 if (str == NULL) 371 return CRYPTO_malloc(num, file, line); 372 373 if (num <= 0) return NULL; 374 375 if (realloc_debug_func != NULL) 376 realloc_debug_func(str, NULL, num, file, line, 0); 377 ret=malloc_ex_func(num,file,line); 378 if(ret) 379 { 380 memcpy(ret,str,old_len); 381 OPENSSL_cleanse(str,old_len); 382 free_func(str); 383 } 384 #ifdef LEVITTE_DEBUG_MEM 385 fprintf(stderr, 386 "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n", 387 str, ret, num); 388 #endif 389 if (realloc_debug_func != NULL) 390 realloc_debug_func(str, ret, num, file, line, 1); 391 392 return ret; 393 } 394 395 void CRYPTO_free(void *str) 396 { 397 if (free_debug_func != NULL) 398 free_debug_func(str, 0); 399 #ifdef LEVITTE_DEBUG_MEM 400 fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str); 401 #endif 402 free_func(str); 403 if (free_debug_func != NULL) 404 free_debug_func(NULL, 1); 405 } 406 407 void *CRYPTO_remalloc(void *a, int num, const char *file, int line) 408 { 409 if (a != NULL) OPENSSL_free(a); 410 a=(char *)OPENSSL_malloc(num); 411 return(a); 412 } 413 414 void CRYPTO_set_mem_debug_options(long bits) 415 { 416 if (set_debug_options_func != NULL) 417 set_debug_options_func(bits); 418 } 419 420 long CRYPTO_get_mem_debug_options(void) 421 { 422 if (get_debug_options_func != NULL) 423 return get_debug_options_func(); 424 return 0; 425 } 426 427 int CRYPTO_push_info_(const char *info, const char *file, int line) 428 { 429 if (push_info_func) 430 return push_info_func(info, file, line); 431 return 1; 432 } 433 434 int CRYPTO_pop_info(void) 435 { 436 if (pop_info_func) 437 return pop_info_func(); 438 return 1; 439 } 440 441 int CRYPTO_remove_all_info(void) 442 { 443 if (remove_all_info_func) 444 return remove_all_info_func(); 445 return 1; 446 } 447
