ref: bae3ac29fc39bc36329abf1823004c0d79b2f6f0
dir: /sys/src/ape/lib/openssl/crypto/mem.c/
/* crypto/mem.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <stdio.h>
#include <stdlib.h>
#include <openssl/crypto.h>
#include "cryptlib.h"
static int allow_customize = 1; /* we provide flexible functions for */
static int allow_customize_debug = 1;/* exchanging memory-related functions at
* run-time, but this must be done
* before any blocks are actually
* allocated; or we'll run into huge
* problems when malloc/free pairs
* don't match etc. */
/* the following pointers may be changed as long as 'allow_customize' is set */
static void *(*malloc_func)(size_t) = malloc;
static void *default_malloc_ex(size_t num, const char *file, int line)
{ return malloc_func(num); }
static void *(*malloc_ex_func)(size_t, const char *file, int line)
= default_malloc_ex;
static void *(*realloc_func)(void *, size_t)= realloc;
static void *default_realloc_ex(void *str, size_t num,
const char *file, int line)
{ return realloc_func(str,num); }
static void *(*realloc_ex_func)(void *, size_t, const char *file, int line)
= default_realloc_ex;
static void (*free_func)(void *) = free;
static void *(*malloc_locked_func)(size_t) = malloc;
static void *default_malloc_locked_ex(size_t num, const char *file, int line)
{ return malloc_locked_func(num); }
static void *(*malloc_locked_ex_func)(size_t, const char *file, int line)
= default_malloc_locked_ex;
static void (*free_locked_func)(void *) = free;
/* may be changed as long as 'allow_customize_debug' is set */
/* XXX use correct function pointer types */
#ifdef CRYPTO_MDEBUG
/* use default functions from mem_dbg.c */
static void (*malloc_debug_func)(void *,int,const char *,int,int)
= CRYPTO_dbg_malloc;
static void (*realloc_debug_func)(void *,void *,int,const char *,int,int)
= CRYPTO_dbg_realloc;
static void (*free_debug_func)(void *,int) = CRYPTO_dbg_free;
static void (*set_debug_options_func)(long) = CRYPTO_dbg_set_options;
static long (*get_debug_options_func)(void) = CRYPTO_dbg_get_options;
#else
/* applications can use CRYPTO_malloc_debug_init() to select above case
* at run-time */
static void (*malloc_debug_func)(void *,int,const char *,int,int) = NULL;
static void (*realloc_debug_func)(void *,void *,int,const char *,int,int)
= NULL;
static void (*free_debug_func)(void *,int) = NULL;
static void (*set_debug_options_func)(long) = NULL;
static long (*get_debug_options_func)(void) = NULL;
#endif
int CRYPTO_set_mem_functions(void *(*m)(size_t), void *(*r)(void *, size_t),
void (*f)(void *))
{
if (!allow_customize)
return 0;
if ((m == 0) || (r == 0) || (f == 0))
return 0;
malloc_func=m; malloc_ex_func=default_malloc_ex;
realloc_func=r; realloc_ex_func=default_realloc_ex;
free_func=f;
malloc_locked_func=m; malloc_locked_ex_func=default_malloc_locked_ex;
free_locked_func=f;
return 1;
}
int CRYPTO_set_mem_ex_functions(
void *(*m)(size_t,const char *,int),
void *(*r)(void *, size_t,const char *,int),
void (*f)(void *))
{
if (!allow_customize)
return 0;
if ((m == 0) || (r == 0) || (f == 0))
return 0;
malloc_func=0; malloc_ex_func=m;
realloc_func=0; realloc_ex_func=r;
free_func=f;
malloc_locked_func=0; malloc_locked_ex_func=m;
free_locked_func=f;
return 1;
}
int CRYPTO_set_locked_mem_functions(void *(*m)(size_t), void (*f)(void *))
{
if (!allow_customize)
return 0;
if ((m == NULL) || (f == NULL))
return 0;
malloc_locked_func=m; malloc_locked_ex_func=default_malloc_locked_ex;
free_locked_func=f;
return 1;
}
int CRYPTO_set_locked_mem_ex_functions(
void *(*m)(size_t,const char *,int),
void (*f)(void *))
{
if (!allow_customize)
return 0;
if ((m == NULL) || (f == NULL))
return 0;
malloc_locked_func=0; malloc_locked_ex_func=m;
free_func=f;
return 1;
}
int CRYPTO_set_mem_debug_functions(void (*m)(void *,int,const char *,int,int),
void (*r)(void *,void *,int,const char *,int,int),
void (*f)(void *,int),
void (*so)(long),
long (*go)(void))
{
if (!allow_customize_debug)
return 0;
malloc_debug_func=m;
realloc_debug_func=r;
free_debug_func=f;
set_debug_options_func=so;
get_debug_options_func=go;
return 1;
}
void CRYPTO_get_mem_functions(void *(**m)(size_t), void *(**r)(void *, size_t),
void (**f)(void *))
{
if (m != NULL) *m = (malloc_ex_func == default_malloc_ex) ?
malloc_func : 0;
if (r != NULL) *r = (realloc_ex_func == default_realloc_ex) ?
realloc_func : 0;
if (f != NULL) *f=free_func;
}
void CRYPTO_get_mem_ex_functions(
void *(**m)(size_t,const char *,int),
void *(**r)(void *, size_t,const char *,int),
void (**f)(void *))
{
if (m != NULL) *m = (malloc_ex_func != default_malloc_ex) ?
malloc_ex_func : 0;
if (r != NULL) *r = (realloc_ex_func != default_realloc_ex) ?
realloc_ex_func : 0;
if (f != NULL) *f=free_func;
}
void CRYPTO_get_locked_mem_functions(void *(**m)(size_t), void (**f)(void *))
{
if (m != NULL) *m = (malloc_locked_ex_func == default_malloc_locked_ex) ?
malloc_locked_func : 0;
if (f != NULL) *f=free_locked_func;
}
void CRYPTO_get_locked_mem_ex_functions(
void *(**m)(size_t,const char *,int),
void (**f)(void *))
{
if (m != NULL) *m = (malloc_locked_ex_func != default_malloc_locked_ex) ?
malloc_locked_ex_func : 0;
if (f != NULL) *f=free_locked_func;
}
void CRYPTO_get_mem_debug_functions(void (**m)(void *,int,const char *,int,int),
void (**r)(void *,void *,int,const char *,int,int),
void (**f)(void *,int),
void (**so)(long),
long (**go)(void))
{
if (m != NULL) *m=malloc_debug_func;
if (r != NULL) *r=realloc_debug_func;
if (f != NULL) *f=free_debug_func;
if (so != NULL) *so=set_debug_options_func;
if (go != NULL) *go=get_debug_options_func;
}
void *CRYPTO_malloc_locked(int num, const char *file, int line)
{
void *ret = NULL;
extern unsigned char cleanse_ctr;
if (num <= 0) return NULL;
allow_customize = 0;
if (malloc_debug_func != NULL)
{
allow_customize_debug = 0;
malloc_debug_func(NULL, num, file, line, 0);
}
ret = malloc_locked_ex_func(num,file,line);
#ifdef LEVITTE_DEBUG_MEM
fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num);
#endif
if (malloc_debug_func != NULL)
malloc_debug_func(ret, num, file, line, 1);
/* Create a dependency on the value of 'cleanse_ctr' so our memory
* sanitisation function can't be optimised out. NB: We only do
* this for >2Kb so the overhead doesn't bother us. */
if(ret && (num > 2048))
((unsigned char *)ret)[0] = cleanse_ctr;
return ret;
}
void CRYPTO_free_locked(void *str)
{
if (free_debug_func != NULL)
free_debug_func(str, 0);
#ifdef LEVITTE_DEBUG_MEM
fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str);
#endif
free_locked_func(str);
if (free_debug_func != NULL)
free_debug_func(NULL, 1);
}
void *CRYPTO_malloc(int num, const char *file, int line)
{
void *ret = NULL;
extern unsigned char cleanse_ctr;
if (num <= 0) return NULL;
allow_customize = 0;
if (malloc_debug_func != NULL)
{
allow_customize_debug = 0;
malloc_debug_func(NULL, num, file, line, 0);
}
ret = malloc_ex_func(num,file,line);
#ifdef LEVITTE_DEBUG_MEM
fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num);
#endif
if (malloc_debug_func != NULL)
malloc_debug_func(ret, num, file, line, 1);
/* Create a dependency on the value of 'cleanse_ctr' so our memory
* sanitisation function can't be optimised out. NB: We only do
* this for >2Kb so the overhead doesn't bother us. */
if(ret && (num > 2048))
((unsigned char *)ret)[0] = cleanse_ctr;
return ret;
}
void *CRYPTO_realloc(void *str, int num, const char *file, int line)
{
void *ret = NULL;
if (str == NULL)
return CRYPTO_malloc(num, file, line);
if (num <= 0) return NULL;
if (realloc_debug_func != NULL)
realloc_debug_func(str, NULL, num, file, line, 0);
ret = realloc_ex_func(str,num,file,line);
#ifdef LEVITTE_DEBUG_MEM
fprintf(stderr, "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n", str, ret, num);
#endif
if (realloc_debug_func != NULL)
realloc_debug_func(str, ret, num, file, line, 1);
return ret;
}
void *CRYPTO_realloc_clean(void *str, int old_len, int num, const char *file,
int line)
{
void *ret = NULL;
if (str == NULL)
return CRYPTO_malloc(num, file, line);
if (num <= 0) return NULL;
if (realloc_debug_func != NULL)
realloc_debug_func(str, NULL, num, file, line, 0);
ret=malloc_ex_func(num,file,line);
if(ret)
{
memcpy(ret,str,old_len);
OPENSSL_cleanse(str,old_len);
free_func(str);
}
#ifdef LEVITTE_DEBUG_MEM
fprintf(stderr,
"LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n",
str, ret, num);
#endif
if (realloc_debug_func != NULL)
realloc_debug_func(str, ret, num, file, line, 1);
return ret;
}
void CRYPTO_free(void *str)
{
if (free_debug_func != NULL)
free_debug_func(str, 0);
#ifdef LEVITTE_DEBUG_MEM
fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str);
#endif
free_func(str);
if (free_debug_func != NULL)
free_debug_func(NULL, 1);
}
void *CRYPTO_remalloc(void *a, int num, const char *file, int line)
{
if (a != NULL) OPENSSL_free(a);
a=(char *)OPENSSL_malloc(num);
return(a);
}
void CRYPTO_set_mem_debug_options(long bits)
{
if (set_debug_options_func != NULL)
set_debug_options_func(bits);
}
long CRYPTO_get_mem_debug_options(void)
{
if (get_debug_options_func != NULL)
return get_debug_options_func();
return 0;
}