Security/libsecurity_apple_csp/open_ssl/mem.c

   1 /*
   2  * Copyright (c) 2000-2001,2011,2014 Apple Inc. All Rights Reserved.
   3  *
   4  * The contents of this file constitute Original Code as defined in and are
   5  * subject to the Apple Public Source License Version 1.2 (the 'License').
   6  * You may not use this file except in compliance with the License. Please obtain
   7  * a copy of the License at http://www.apple.com/publicsource and read it before
   8  * using this file.
   9  *
  10  * This Original Code and all software distributed under the License are
  11  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
  12  * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
  13  * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14  * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
  15  * specific language governing rights and limitations under the License.
  16  */
  17
  18
  19 /* crypto/mem.c */
  20 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  21  * All rights reserved.
  22  *
  23  * This package is an SSL implementation written
  24  * by Eric Young (eay@cryptsoft.com).
  25  * The implementation was written so as to conform with Netscapes SSL.
  26  *
  27  * This library is free for commercial and non-commercial use as long as
  28  * the following conditions are aheared to.  The following conditions
  29  * apply to all code found in this distribution, be it the RC4, RSA,
  30  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  31  * included with this distribution is covered by the same copyright terms
  32  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  33  *
  34  * Copyright remains Eric Young's, and as such any Copyright notices in
  35  * the code are not to be removed.
  36  * If this package is used in a product, Eric Young should be given attribution
  37  * as the author of the parts of the library used.
  38  * This can be in the form of a textual message at program startup or
  39  * in documentation (online or textual) provided with the package.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 3. All advertising materials mentioning features or use of this software
  50  *    must display the following acknowledgement:
  51  *    "This product includes cryptographic software written by
  52  *     Eric Young (eay@cryptsoft.com)"
  53  *    The word 'cryptographic' can be left out if the rouines from the library
  54  *    being used are not cryptographic related :-).
  55  * 4. If you include any Windows specific code (or a derivative thereof) from
  56  *    the apps directory (application code) you must include an acknowledgement:
  57  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  58  *
  59  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  60  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  61  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  62  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  63  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  64  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  65  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  66  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  67  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  69  * SUCH DAMAGE.
  70  *
  71  * The licence and distribution terms for any publically available version or
  72  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  73  * copied and put under another distribution licence
  74  * [including the GNU Public Licence.]
  75  */
  76
  77 #include <stdio.h>
  78 #include <stdlib.h>
  79 #include <openssl/crypto.h>
  80 #include "cryptlib.h"
  81
  82
  83 static int allow_customize = 1;      /* we provide flexible functions for */
  84 static int allow_customize_debug = 1;/* exchanging memory-related functions at
  85                                       * run-time, but this must be done
  86                                       * before any blocks are actually
  87                                       * allocated; or we'll run into huge
  88                                       * problems when malloc/free pairs
  89                                       * don't match etc. */
  90
  91 /* may be changed as long as `allow_customize' is set */
  92 static void *(*malloc_locked_func)(size_t)  = malloc;
  93 static void (*free_locked_func)(void *)     = free;
  94 static void *(*malloc_func)(size_t)         = malloc;
  95 static void *(*realloc_func)(void *, size_t)= realloc;
  96 static void (*free_func)(void *)            = free;
  97
  98 /* may be changed as long as `allow_customize_debug' is set */
  99 /* XXX use correct function pointer types */
 100 #ifdef CRYPTO_MDEBUG
 101   /* use default functions from mem_dbg.c */
 102   static void (*malloc_debug_func)()= (void (*)())CRYPTO_dbg_malloc;
 103   static void (*realloc_debug_func)()= (void (*)())CRYPTO_dbg_realloc;
 104   static void (*free_debug_func)()= (void (*)())CRYPTO_dbg_free;
 105   static void (*set_debug_options_func)()= (void (*)())CRYPTO_dbg_set_options;
 106   static long (*get_debug_options_func)()= (long (*)())CRYPTO_dbg_get_options;
 107 #else
 108   /* applications can use CRYPTO_malloc_debug_init() to select above case
 109    * at run-time */
 110   static void (*malloc_debug_func)()= NULL;
 111   static void (*realloc_debug_func)()= NULL;
 112   static void (*free_debug_func)()= NULL;
 113   static void (*set_debug_options_func)()= NULL;
 114   static long (*get_debug_options_func)()= NULL;
 115 #endif
 116
 117
 118 int CRYPTO_set_mem_functions(void *(*m)(size_t), void *(*r)(void *, size_t),
 119         void (*f)(void *))
 120         {
 121         if (!allow_customize)
 122                 return 0;
 123         if ((m == NULL) || (r == NULL) || (f == NULL))
 124                 return 0;
 125         malloc_func=m;
 126         realloc_func=r;
 127         free_func=f;
 128         malloc_locked_func=m;
 129         free_locked_func=f;
 130         return 1;
 131         }
 132
 133 int CRYPTO_set_locked_mem_functions(void *(*m)(size_t), void (*f)(void *))
 134         {
 135         if (!allow_customize)
 136                 return 0;
 137         if ((m == NULL) || (f == NULL))
 138                 return 0;
 139         malloc_locked_func=m;
 140         free_locked_func=f;
 141         return 1;
 142         }
 143
 144 int CRYPTO_set_mem_debug_functions(void (*m)(), void (*r)(), void (*f)(),void (*so)(),long (*go)())
 145         {
 146         if (!allow_customize_debug)
 147                 return 0;
 148         malloc_debug_func=m;
 149         realloc_debug_func=r;
 150         free_debug_func=f;
 151         set_debug_options_func=so;
 152         get_debug_options_func=go;
 153         return 1;
 154         }
 155
 156 void CRYPTO_get_mem_functions(void *(**m)(size_t), void *(**r)(void *, size_t),
 157         void (**f)(void *))
 158         {
 159         if (m != NULL) *m=malloc_func;
 160         if (r != NULL) *r=realloc_func;
 161         if (f != NULL) *f=free_func;
 162         }
 163
 164 void CRYPTO_get_locked_mem_functions(void *(**m)(size_t), void (**f)(void *))
 165         {
 166         if (m != NULL) *m=malloc_locked_func;
 167         if (f != NULL) *f=free_locked_func;
 168         }
 169
 170 void CRYPTO_get_mem_debug_functions(void (**m)(), void (**r)(), void (**f)(),void (**so)(),long (**go)())
 171         {
 172         if (m != NULL) *m=malloc_debug_func;
 173         if (r != NULL) *r=realloc_debug_func;
 174         if (f != NULL) *f=free_debug_func;
 175         if (so != NULL) *so=set_debug_options_func;
 176         if (go != NULL) *go=get_debug_options_func;
 177         }
 178
 179
 180 void *CRYPTO_malloc_locked(int num, const char *file, int line)
 181         {
 182         char *ret = NULL;
 183
 184         allow_customize = 0;
 185         if (malloc_debug_func != NULL)
 186                 {
 187                 allow_customize_debug = 0;
 188                 malloc_debug_func(NULL, num, file, line, 0);
 189                 }
 190         ret = malloc_locked_func(num);
 191 #ifdef LEVITTE_DEBUG
 192         fprintf(stderr, "LEVITTE_DEBUG:         > 0x%p (%d)\n", ret, num);
 193 #endif
 194         if (malloc_debug_func != NULL)
 195                 malloc_debug_func(ret, num, file, line, 1);
 196
 197         return ret;
 198         }
 199
 200 void CRYPTO_free_locked(void *str)
 201         {
 202         if (free_debug_func != NULL)
 203                 free_debug_func(str, 0);
 204 #ifdef LEVITTE_DEBUG
 205         fprintf(stderr, "LEVITTE_DEBUG:         < 0x%p\n", str);
 206 #endif
 207         free_locked_func(str);
 208         if (free_debug_func != NULL)
 209                 free_debug_func(NULL, 1);
 210         }
 211
 212 void *CRYPTO_malloc(int num, const char *file, int line)
 213         {
 214         char *ret = NULL;
 215
 216         allow_customize = 0;
 217         if (malloc_debug_func != NULL)
 218                 {
 219                 allow_customize_debug = 0;
 220                 malloc_debug_func(NULL, num, file, line, 0);
 221                 }
 222         ret = malloc_func(num);
 223 #ifdef LEVITTE_DEBUG
 224         fprintf(stderr, "LEVITTE_DEBUG:         > 0x%p (%d)\n", ret, num);
 225 #endif
 226         if (malloc_debug_func != NULL)
 227                 malloc_debug_func(ret, num, file, line, 1);
 228
 229         return ret;
 230         }
 231
 232 void *CRYPTO_realloc(void *str, int num, const char *file, int line)
 233         {
 234         char *ret = NULL;
 235
 236         if (realloc_debug_func != NULL)
 237                 realloc_debug_func(str, NULL, num, file, line, 0);
 238         ret = realloc_func(str,num);
 239 #ifdef LEVITTE_DEBUG
 240         fprintf(stderr, "LEVITTE_DEBUG:         | 0x%p -> 0x%p (%d)\n", str, ret, num);
 241 #endif
 242         if (realloc_debug_func != NULL)
 243                 realloc_debug_func(str, ret, num, file, line, 1);
 244
 245         return ret;
 246         }
 247
 248 void CRYPTO_free(void *str)
 249         {
 250         if (free_debug_func != NULL)
 251                 free_debug_func(str, 0);
 252 #ifdef LEVITTE_DEBUG
 253         fprintf(stderr, "LEVITTE_DEBUG:         < 0x%p\n", str);
 254 #endif
 255         free_func(str);
 256         if (free_debug_func != NULL)
 257                 free_debug_func(NULL, 1);
 258         }
 259
 260 void *CRYPTO_remalloc(void *a, int num, const char *file, int line)
 261         {
 262         if (a != NULL) Free(a);
 263         a=(char *)Malloc(num);
 264         return(a);
 265         }
 266
 267
 268 void CRYPTO_set_mem_debug_options(long bits)
 269         {
 270         if (set_debug_options_func != NULL)
 271                 set_debug_options_func(bits);
 272         }
 273
 274 long CRYPTO_get_mem_debug_options(void)
 275         {
 276         if (get_debug_options_func != NULL)
 277                 return get_debug_options_func();
 278         return 0;
 279         }