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