cscrypt/mem.c

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