release/src/router/openssl/crypto/mem.c

   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 int CRYPTO_set_mem_functions(void *(*m)(size_t), void *(*r)(void *, size_t),
 125         void (*f)(void *))
 126         {
 127         /* Dummy call just to ensure OPENSSL_init() gets linked in */
 128         OPENSSL_init();
 129         if (!allow_customize)
 130                 return 0;
 131         if ((m == 0) || (r == 0) || (f == 0))
 132                 return 0;
 133         malloc_func=m; malloc_ex_func=default_malloc_ex;
 134         realloc_func=r; realloc_ex_func=default_realloc_ex;
 135         free_func=f;
 136         malloc_locked_func=m; malloc_locked_ex_func=default_malloc_locked_ex;
 137         free_locked_func=f;
 138         return 1;
 139         }
 140
 141 int CRYPTO_set_mem_ex_functions(
 142         void *(*m)(size_t,const char *,int),
 143         void *(*r)(void *, size_t,const char *,int),
 144         void (*f)(void *))
 145         {
 146         if (!allow_customize)
 147                 return 0;
 148         if ((m == 0) || (r == 0) || (f == 0))
 149                 return 0;
 150         malloc_func=0; malloc_ex_func=m;
 151         realloc_func=0; realloc_ex_func=r;
 152         free_func=f;
 153         malloc_locked_func=0; malloc_locked_ex_func=m;
 154         free_locked_func=f;
 155         return 1;
 156         }
 157
 158 int CRYPTO_set_locked_mem_functions(void *(*m)(size_t), void (*f)(void *))
 159         {
 160         if (!allow_customize)
 161                 return 0;
 162         if ((m == NULL) || (f == NULL))
 163                 return 0;
 164         malloc_locked_func=m; malloc_locked_ex_func=default_malloc_locked_ex;
 165         free_locked_func=f;
 166         return 1;
 167         }
 168
 169 int CRYPTO_set_locked_mem_ex_functions(
 170         void *(*m)(size_t,const char *,int),
 171         void (*f)(void *))
 172         {
 173         if (!allow_customize)
 174                 return 0;
 175         if ((m == NULL) || (f == NULL))
 176                 return 0;
 177         malloc_locked_func=0; malloc_locked_ex_func=m;
 178         free_func=f;
 179         return 1;
 180         }
 181
 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),
 185                                    void (*so)(long),
 186                                    long (*go)(void))
 187         {
 188         if (!allow_customize_debug)
 189                 return 0;
 190         OPENSSL_init();
 191         malloc_debug_func=m;
 192         realloc_debug_func=r;
 193         free_debug_func=f;
 194         set_debug_options_func=so;
 195         get_debug_options_func=go;
 196         return 1;
 197         }
 198
 199
 200 void CRYPTO_get_mem_functions(void *(**m)(size_t), void *(**r)(void *, size_t),
 201         void (**f)(void *))
 202         {
 203         if (m != NULL) *m = (malloc_ex_func == default_malloc_ex) ?
 204                              malloc_func : 0;
 205         if (r != NULL) *r = (realloc_ex_func == default_realloc_ex) ?
 206                              realloc_func : 0;
 207         if (f != NULL) *f=free_func;
 208         }
 209
 210 void CRYPTO_get_mem_ex_functions(
 211         void *(**m)(size_t,const char *,int),
 212         void *(**r)(void *, size_t,const char *,int),
 213         void (**f)(void *))
 214         {
 215         if (m != NULL) *m = (malloc_ex_func != default_malloc_ex) ?
 216                             malloc_ex_func : 0;
 217         if (r != NULL) *r = (realloc_ex_func != default_realloc_ex) ?
 218                             realloc_ex_func : 0;
 219         if (f != NULL) *f=free_func;
 220         }
 221
 222 void CRYPTO_get_locked_mem_functions(void *(**m)(size_t), void (**f)(void *))
 223         {
 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;
 227         }
 228
 229 void CRYPTO_get_locked_mem_ex_functions(
 230         void *(**m)(size_t,const char *,int),
 231         void (**f)(void *))
 232         {
 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;
 236         }
 237
 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),
 241                                     void (**so)(long),
 242                                     long (**go)(void))
 243         {
 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;
 249         }
 250
 251
 252 void *CRYPTO_malloc_locked(int num, const char *file, int line)
 253         {
 254         void *ret = NULL;
 255
 256         if (num <= 0) return NULL;
 257
 258         allow_customize = 0;
 259         if (malloc_debug_func != NULL)
 260                 {
 261                 allow_customize_debug = 0;
 262                 malloc_debug_func(NULL, num, file, line, 0);
 263                 }
 264         ret = malloc_locked_ex_func(num,file,line);
 265 #ifdef LEVITTE_DEBUG_MEM
 266         fprintf(stderr, "LEVITTE_DEBUG_MEM:         > 0x%p (%d)\n", ret, num);
 267 #endif
 268         if (malloc_debug_func != NULL)
 269                 malloc_debug_func(ret, num, file, line, 1);
 270
 271 #ifndef OPENSSL_CPUID_OBJ
 272         /* Create a dependency on the value of 'cleanse_ctr' so our memory
 273          * sanitisation function can't be optimised out. NB: We only do
 274          * this for >2Kb so the overhead doesn't bother us. */
 275         if(ret && (num > 2048))
 276         {       extern unsigned char cleanse_ctr;
 277                 ((unsigned char *)ret)[0] = cleanse_ctr;
 278         }
 279 #endif
 280
 281         return ret;
 282         }
 283
 284 void CRYPTO_free_locked(void *str)
 285         {
 286         if (free_debug_func != NULL)
 287                 free_debug_func(str, 0);
 288 #ifdef LEVITTE_DEBUG_MEM
 289         fprintf(stderr, "LEVITTE_DEBUG_MEM:         < 0x%p\n", str);
 290 #endif
 291         free_locked_func(str);
 292         if (free_debug_func != NULL)
 293                 free_debug_func(NULL, 1);
 294         }
 295
 296 void *CRYPTO_malloc(int num, const char *file, int line)
 297         {
 298         void *ret = NULL;
 299
 300         if (num <= 0) return NULL;
 301
 302         allow_customize = 0;
 303         if (malloc_debug_func != NULL)
 304                 {
 305                 allow_customize_debug = 0;
 306                 malloc_debug_func(NULL, num, file, line, 0);
 307                 }
 308         ret = malloc_ex_func(num,file,line);
 309 #ifdef LEVITTE_DEBUG_MEM
 310         fprintf(stderr, "LEVITTE_DEBUG_MEM:         > 0x%p (%d)\n", ret, num);
 311 #endif
 312         if (malloc_debug_func != NULL)
 313                 malloc_debug_func(ret, num, file, line, 1);
 314
 315 #ifndef OPENSSL_CPUID_OBJ
 316         /* Create a dependency on the value of 'cleanse_ctr' so our memory
 317          * sanitisation function can't be optimised out. NB: We only do
 318          * this for >2Kb so the overhead doesn't bother us. */
 319         if(ret && (num > 2048))
 320         {       extern unsigned char cleanse_ctr;
 321                 ((unsigned char *)ret)[0] = cleanse_ctr;
 322         }
 323 #endif
 324
 325         return ret;
 326         }
 327 char *CRYPTO_strdup(const char *str, const char *file, int line)
 328         {
 329         char *ret = CRYPTO_malloc(strlen(str)+1, file, line);
 330
 331         strcpy(ret, str);
 332         return ret;
 333         }
 334
 335 void *CRYPTO_realloc(void *str, int num, const char *file, int line)
 336         {
 337         void *ret = NULL;
 338
 339         if (str == NULL)
 340                 return CRYPTO_malloc(num, file, line);
 341
 342         if (num <= 0) return NULL;
 343
 344         if (realloc_debug_func != NULL)
 345                 realloc_debug_func(str, NULL, num, file, line, 0);
 346         ret = realloc_ex_func(str,num,file,line);
 347 #ifdef LEVITTE_DEBUG_MEM
 348         fprintf(stderr, "LEVITTE_DEBUG_MEM:         | 0x%p -> 0x%p (%d)\n", str, ret, num);
 349 #endif
 350         if (realloc_debug_func != NULL)
 351                 realloc_debug_func(str, ret, num, file, line, 1);
 352
 353         return ret;
 354         }
 355
 356 void *CRYPTO_realloc_clean(void *str, int old_len, int num, const char *file,
 357                            int line)
 358         {
 359         void *ret = NULL;
 360
 361         if (str == NULL)
 362                 return CRYPTO_malloc(num, file, line);
 363
 364         if (num <= 0) return NULL;
 365
 366         /* We don't support shrinking the buffer. Note the memcpy that copies
 367          * |old_len| bytes to the new buffer, below. */
 368         if (num < old_len) return NULL;
 369
 370         if (realloc_debug_func != NULL)
 371                 realloc_debug_func(str, NULL, num, file, line, 0);
 372         ret=malloc_ex_func(num,file,line);
 373         if(ret)
 374                 {
 375                 memcpy(ret,str,old_len);
 376                 OPENSSL_cleanse(str,old_len);
 377                 free_func(str);
 378                 }
 379 #ifdef LEVITTE_DEBUG_MEM
 380         fprintf(stderr,
 381                 "LEVITTE_DEBUG_MEM:         | 0x%p -> 0x%p (%d)\n",
 382                 str, ret, num);
 383 #endif
 384         if (realloc_debug_func != NULL)
 385                 realloc_debug_func(str, ret, num, file, line, 1);
 386
 387         return ret;
 388         }
 389
 390 void CRYPTO_free(void *str)
 391         {
 392         if (free_debug_func != NULL)
 393                 free_debug_func(str, 0);
 394 #ifdef LEVITTE_DEBUG_MEM
 395         fprintf(stderr, "LEVITTE_DEBUG_MEM:         < 0x%p\n", str);
 396 #endif
 397         free_func(str);
 398         if (free_debug_func != NULL)
 399                 free_debug_func(NULL, 1);
 400         }
 401
 402 void *CRYPTO_remalloc(void *a, int num, const char *file, int line)
 403         {
 404         if (a != NULL) OPENSSL_free(a);
 405         a=(char *)OPENSSL_malloc(num);
 406         return(a);
 407         }
 408
 409 void CRYPTO_set_mem_debug_options(long bits)
 410         {
 411         if (set_debug_options_func != NULL)
 412                 set_debug_options_func(bits);
 413         }
 414
 415 long CRYPTO_get_mem_debug_options(void)
 416         {
 417         if (get_debug_options_func != NULL)
 418                 return get_debug_options_func();
 419         return 0;
 420         }