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OpenSSL 0.9.5 merge

*warning* this bumps shared lib minors for libssl and libcrypto from 2.1 to 2.2
if you are using the ssl26 packages for ssh and other things to work you will
need to get new ones (see ~beck/libsslsnap/<arch>) on cvs or ~beck/src-patent.tar.gz on cvs

/* 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. */

/* may be changed as long as `allow_customize' is set */
static void *(*malloc_locked_func)(size_t)  = malloc;
static void (*free_locked_func)(void *)     = free;
static void *(*malloc_func)(size_t)         = malloc;
static void *(*realloc_func)(void *, size_t)= realloc;
static void (*free_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 (*)())CRYPTO_dbg_malloc;
  static void (*realloc_debug_func)()= (void (*)())CRYPTO_dbg_realloc;
  static void (*free_debug_func)()= (void (*)())CRYPTO_dbg_free;
  static void (*set_debug_options_func)()= (void (*)())CRYPTO_dbg_set_options;
  static long (*get_debug_options_func)()= (long (*)())CRYPTO_dbg_get_options;
#else
  /* applications can use CRYPTO_malloc_debug_init() to select above case
   * at run-time */
  static void (*malloc_debug_func)()= NULL;
  static void (*realloc_debug_func)()= NULL;
  static void (*free_debug_func)()= NULL;
  static void (*set_debug_options_func)()= NULL;
  static long (*get_debug_options_func)()= 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 == NULL) || (r == NULL) || (f == NULL))
		return 0;
	malloc_func=m;
	realloc_func=r;
	free_func=f;
	malloc_locked_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;
	free_locked_func=f;
	return 1;
	}

int CRYPTO_set_mem_debug_functions(void (*m)(), void (*r)(), void (*f)(),void (*so)(),long (*go)())
	{
	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_func;
	if (r != NULL) *r=realloc_func;
	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_func;
	if (f != NULL) *f=free_locked_func;
	}

void CRYPTO_get_mem_debug_functions(void (**m)(), void (**r)(), void (**f)(),void (**so)(),long (**go)())
	{
	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)
	{
	char *ret = NULL;

	allow_customize = 0;
	if (malloc_debug_func != NULL)
		{
		allow_customize_debug = 0;
		malloc_debug_func(NULL, num, file, line, 0);
		}
	ret = malloc_locked_func(num);
#ifdef LEVITTE_DEBUG
	fprintf(stderr, "LEVITTE_DEBUG:         > 0x%p (%d)\n", ret, num);
#endif
	if (malloc_debug_func != NULL)
		malloc_debug_func(ret, num, file, line, 1);

	return ret;
	}

void CRYPTO_free_locked(void *str)
	{
	if (free_debug_func != NULL)
		free_debug_func(str, 0);
#ifdef LEVITTE_DEBUG
	fprintf(stderr, "LEVITTE_DEBUG:         < 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)
	{
	char *ret = NULL;

	allow_customize = 0;
	if (malloc_debug_func != NULL)
		{
		allow_customize_debug = 0;
		malloc_debug_func(NULL, num, file, line, 0);
		}
	ret = malloc_func(num);
#ifdef LEVITTE_DEBUG
	fprintf(stderr, "LEVITTE_DEBUG:         > 0x%p (%d)\n", ret, num);
#endif
	if (malloc_debug_func != NULL)
		malloc_debug_func(ret, num, file, line, 1);

	return ret;
	}

void *CRYPTO_realloc(void *str, int num, const char *file, int line)
	{
	char *ret = NULL;

	if (realloc_debug_func != NULL)
		realloc_debug_func(str, NULL, num, file, line, 0);
	ret = realloc_func(str,num);
#ifdef LEVITTE_DEBUG
	fprintf(stderr, "LEVITTE_DEBUG:         | 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
	fprintf(stderr, "LEVITTE_DEBUG:         < 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) Free(a);
	a=(char *)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;
	}