Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/mem.c */ |
| 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 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. |
| 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@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@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)" |
| 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 | #ifdef CRYPTO_MDEBUG |
| 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 | #else |
| 114 | /* applications can use CRYPTO_malloc_debug_init() to select above case |
| 115 | * at run-time */ |
| 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) |
| 118 | = NULL; |
| 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; |
| 122 | #endif |
| 123 | |
| 124 | |
| 125 | int CRYPTO_set_mem_functions(void *(*m)(size_t), void *(*r)(void *, size_t), |
| 126 | void (*f)(void *)) |
| 127 | { |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 128 | if (!allow_customize) |
| 129 | return 0; |
| 130 | if ((m == 0) || (r == 0) || (f == 0)) |
| 131 | return 0; |
| 132 | malloc_func=m; malloc_ex_func=default_malloc_ex; |
| 133 | realloc_func=r; realloc_ex_func=default_realloc_ex; |
| 134 | free_func=f; |
| 135 | malloc_locked_func=m; malloc_locked_ex_func=default_malloc_locked_ex; |
| 136 | free_locked_func=f; |
| 137 | return 1; |
| 138 | } |
| 139 | |
| 140 | int CRYPTO_set_mem_ex_functions( |
| 141 | void *(*m)(size_t,const char *,int), |
| 142 | void *(*r)(void *, size_t,const char *,int), |
| 143 | void (*f)(void *)) |
| 144 | { |
| 145 | if (!allow_customize) |
| 146 | return 0; |
| 147 | if ((m == 0) || (r == 0) || (f == 0)) |
| 148 | return 0; |
| 149 | malloc_func=0; malloc_ex_func=m; |
| 150 | realloc_func=0; realloc_ex_func=r; |
| 151 | free_func=f; |
| 152 | malloc_locked_func=0; malloc_locked_ex_func=m; |
| 153 | free_locked_func=f; |
| 154 | return 1; |
| 155 | } |
| 156 | |
| 157 | int CRYPTO_set_locked_mem_functions(void *(*m)(size_t), void (*f)(void *)) |
| 158 | { |
| 159 | if (!allow_customize) |
| 160 | return 0; |
| 161 | if ((m == NULL) || (f == NULL)) |
| 162 | return 0; |
| 163 | malloc_locked_func=m; malloc_locked_ex_func=default_malloc_locked_ex; |
| 164 | free_locked_func=f; |
| 165 | return 1; |
| 166 | } |
| 167 | |
| 168 | int CRYPTO_set_locked_mem_ex_functions( |
| 169 | void *(*m)(size_t,const char *,int), |
| 170 | void (*f)(void *)) |
| 171 | { |
| 172 | if (!allow_customize) |
| 173 | return 0; |
| 174 | if ((m == NULL) || (f == NULL)) |
| 175 | return 0; |
| 176 | malloc_locked_func=0; malloc_locked_ex_func=m; |
| 177 | free_func=f; |
| 178 | return 1; |
| 179 | } |
| 180 | |
| 181 | int CRYPTO_set_mem_debug_functions(void (*m)(void *,int,const char *,int,int), |
| 182 | void (*r)(void *,void *,int,const char *,int,int), |
| 183 | void (*f)(void *,int), |
| 184 | void (*so)(long), |
| 185 | long (*go)(void)) |
| 186 | { |
| 187 | if (!allow_customize_debug) |
| 188 | return 0; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 189 | malloc_debug_func=m; |
| 190 | realloc_debug_func=r; |
| 191 | free_debug_func=f; |
| 192 | set_debug_options_func=so; |
| 193 | get_debug_options_func=go; |
| 194 | return 1; |
| 195 | } |
| 196 | |
| 197 | |
| 198 | void CRYPTO_get_mem_functions(void *(**m)(size_t), void *(**r)(void *, size_t), |
| 199 | void (**f)(void *)) |
| 200 | { |
| 201 | if (m != NULL) *m = (malloc_ex_func == default_malloc_ex) ? |
| 202 | malloc_func : 0; |
| 203 | if (r != NULL) *r = (realloc_ex_func == default_realloc_ex) ? |
| 204 | realloc_func : 0; |
| 205 | if (f != NULL) *f=free_func; |
| 206 | } |
| 207 | |
| 208 | void CRYPTO_get_mem_ex_functions( |
| 209 | void *(**m)(size_t,const char *,int), |
| 210 | void *(**r)(void *, size_t,const char *,int), |
| 211 | void (**f)(void *)) |
| 212 | { |
| 213 | if (m != NULL) *m = (malloc_ex_func != default_malloc_ex) ? |
| 214 | malloc_ex_func : 0; |
| 215 | if (r != NULL) *r = (realloc_ex_func != default_realloc_ex) ? |
| 216 | realloc_ex_func : 0; |
| 217 | if (f != NULL) *f=free_func; |
| 218 | } |
| 219 | |
| 220 | void CRYPTO_get_locked_mem_functions(void *(**m)(size_t), void (**f)(void *)) |
| 221 | { |
| 222 | if (m != NULL) *m = (malloc_locked_ex_func == default_malloc_locked_ex) ? |
| 223 | malloc_locked_func : 0; |
| 224 | if (f != NULL) *f=free_locked_func; |
| 225 | } |
| 226 | |
| 227 | void CRYPTO_get_locked_mem_ex_functions( |
| 228 | void *(**m)(size_t,const char *,int), |
| 229 | void (**f)(void *)) |
| 230 | { |
| 231 | if (m != NULL) *m = (malloc_locked_ex_func != default_malloc_locked_ex) ? |
| 232 | malloc_locked_ex_func : 0; |
| 233 | if (f != NULL) *f=free_locked_func; |
| 234 | } |
| 235 | |
| 236 | void CRYPTO_get_mem_debug_functions(void (**m)(void *,int,const char *,int,int), |
| 237 | void (**r)(void *,void *,int,const char *,int,int), |
| 238 | void (**f)(void *,int), |
| 239 | void (**so)(long), |
| 240 | long (**go)(void)) |
| 241 | { |
| 242 | if (m != NULL) *m=malloc_debug_func; |
| 243 | if (r != NULL) *r=realloc_debug_func; |
| 244 | if (f != NULL) *f=free_debug_func; |
| 245 | if (so != NULL) *so=set_debug_options_func; |
| 246 | if (go != NULL) *go=get_debug_options_func; |
| 247 | } |
| 248 | |
| 249 | |
| 250 | void *CRYPTO_malloc_locked(int num, const char *file, int line) |
| 251 | { |
| 252 | void *ret = NULL; |
| 253 | |
| 254 | if (num <= 0) return NULL; |
| 255 | |
| 256 | allow_customize = 0; |
| 257 | if (malloc_debug_func != NULL) |
| 258 | { |
| 259 | allow_customize_debug = 0; |
| 260 | malloc_debug_func(NULL, num, file, line, 0); |
| 261 | } |
| 262 | ret = malloc_locked_ex_func(num,file,line); |
| 263 | #ifdef LEVITTE_DEBUG_MEM |
| 264 | fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num); |
| 265 | #endif |
| 266 | if (malloc_debug_func != NULL) |
| 267 | malloc_debug_func(ret, num, file, line, 1); |
| 268 | |
| 269 | #ifndef OPENSSL_CPUID_OBJ |
| 270 | /* Create a dependency on the value of 'cleanse_ctr' so our memory |
| 271 | * sanitisation function can't be optimised out. NB: We only do |
| 272 | * this for >2Kb so the overhead doesn't bother us. */ |
| 273 | if(ret && (num > 2048)) |
| 274 | { extern unsigned char cleanse_ctr; |
| 275 | ((unsigned char *)ret)[0] = cleanse_ctr; |
| 276 | } |
| 277 | #endif |
| 278 | |
| 279 | return ret; |
| 280 | } |
| 281 | |
| 282 | void CRYPTO_free_locked(void *str) |
| 283 | { |
| 284 | if (free_debug_func != NULL) |
| 285 | free_debug_func(str, 0); |
| 286 | #ifdef LEVITTE_DEBUG_MEM |
| 287 | fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str); |
| 288 | #endif |
| 289 | free_locked_func(str); |
| 290 | if (free_debug_func != NULL) |
| 291 | free_debug_func(NULL, 1); |
| 292 | } |
| 293 | |
| 294 | void *CRYPTO_malloc(int num, const char *file, int line) |
| 295 | { |
| 296 | void *ret = NULL; |
| 297 | |
| 298 | if (num <= 0) return NULL; |
| 299 | |
| 300 | allow_customize = 0; |
| 301 | if (malloc_debug_func != NULL) |
| 302 | { |
| 303 | allow_customize_debug = 0; |
| 304 | malloc_debug_func(NULL, num, file, line, 0); |
| 305 | } |
| 306 | ret = malloc_ex_func(num,file,line); |
| 307 | #ifdef LEVITTE_DEBUG_MEM |
| 308 | fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num); |
| 309 | #endif |
| 310 | if (malloc_debug_func != NULL) |
| 311 | malloc_debug_func(ret, num, file, line, 1); |
| 312 | |
| 313 | #ifndef OPENSSL_CPUID_OBJ |
| 314 | /* Create a dependency on the value of 'cleanse_ctr' so our memory |
| 315 | * sanitisation function can't be optimised out. NB: We only do |
| 316 | * this for >2Kb so the overhead doesn't bother us. */ |
| 317 | if(ret && (num > 2048)) |
| 318 | { extern unsigned char cleanse_ctr; |
| 319 | ((unsigned char *)ret)[0] = cleanse_ctr; |
| 320 | } |
| 321 | #endif |
| 322 | |
| 323 | return ret; |
| 324 | } |
| 325 | char *CRYPTO_strdup(const char *str, const char *file, int line) |
| 326 | { |
| 327 | char *ret = CRYPTO_malloc(strlen(str)+1, file, line); |
| 328 | |
| 329 | strcpy(ret, str); |
| 330 | return ret; |
| 331 | } |
| 332 | |
| 333 | void *CRYPTO_realloc(void *str, int num, const char *file, int line) |
| 334 | { |
| 335 | void *ret = NULL; |
| 336 | |
| 337 | if (str == NULL) |
| 338 | return CRYPTO_malloc(num, file, line); |
| 339 | |
| 340 | if (num <= 0) return NULL; |
| 341 | |
| 342 | if (realloc_debug_func != NULL) |
| 343 | realloc_debug_func(str, NULL, num, file, line, 0); |
| 344 | ret = realloc_ex_func(str,num,file,line); |
| 345 | #ifdef LEVITTE_DEBUG_MEM |
| 346 | fprintf(stderr, "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n", str, ret, num); |
| 347 | #endif |
| 348 | if (realloc_debug_func != NULL) |
| 349 | realloc_debug_func(str, ret, num, file, line, 1); |
| 350 | |
| 351 | return ret; |
| 352 | } |
| 353 | |
| 354 | void *CRYPTO_realloc_clean(void *str, int old_len, int num, const char *file, |
| 355 | int line) |
| 356 | { |
| 357 | void *ret = NULL; |
| 358 | |
| 359 | if (str == NULL) |
| 360 | return CRYPTO_malloc(num, file, line); |
| 361 | |
| 362 | if (num <= 0) return NULL; |
| 363 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 364 | if (realloc_debug_func != NULL) |
| 365 | realloc_debug_func(str, NULL, num, file, line, 0); |
| 366 | ret=malloc_ex_func(num,file,line); |
| 367 | if(ret) |
| 368 | { |
| 369 | memcpy(ret,str,old_len); |
| 370 | OPENSSL_cleanse(str,old_len); |
| 371 | free_func(str); |
| 372 | } |
| 373 | #ifdef LEVITTE_DEBUG_MEM |
| 374 | fprintf(stderr, |
| 375 | "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n", |
| 376 | str, ret, num); |
| 377 | #endif |
| 378 | if (realloc_debug_func != NULL) |
| 379 | realloc_debug_func(str, ret, num, file, line, 1); |
| 380 | |
| 381 | return ret; |
| 382 | } |
| 383 | |
| 384 | void CRYPTO_free(void *str) |
| 385 | { |
| 386 | if (free_debug_func != NULL) |
| 387 | free_debug_func(str, 0); |
| 388 | #ifdef LEVITTE_DEBUG_MEM |
| 389 | fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str); |
| 390 | #endif |
| 391 | free_func(str); |
| 392 | if (free_debug_func != NULL) |
| 393 | free_debug_func(NULL, 1); |
| 394 | } |
| 395 | |
| 396 | void *CRYPTO_remalloc(void *a, int num, const char *file, int line) |
| 397 | { |
| 398 | if (a != NULL) OPENSSL_free(a); |
| 399 | a=(char *)OPENSSL_malloc(num); |
| 400 | return(a); |
| 401 | } |
| 402 | |
| 403 | void CRYPTO_set_mem_debug_options(long bits) |
| 404 | { |
| 405 | if (set_debug_options_func != NULL) |
| 406 | set_debug_options_func(bits); |
| 407 | } |
| 408 | |
| 409 | long CRYPTO_get_mem_debug_options(void) |
| 410 | { |
| 411 | if (get_debug_options_func != NULL) |
| 412 | return get_debug_options_func(); |
| 413 | return 0; |
| 414 | } |