/* 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.]

 */

/*

 © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

 */

#include <stdio.h>

#include <stdlib.h>

#include <openssl/crypto.h>

#include "cryptlib.h"

#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

#include "libcrypto_wsd_macros.h"

#include "libcrypto_wsd.h"

#endif

#ifndef EMULATOR

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. */

#else

 GET_STATIC_VAR_FROM_TLS(allow_customize,mem,int)

 #define allow_customize (*GET_WSD_VAR_NAME(allow_customize,mem,s)())

 GET_STATIC_VAR_FROM_TLS(allow_customize_debug,mem,int)

 #define allow_customize_debug (*GET_WSD_VAR_NAME(allow_customize_debug,mem,s)())

#endif

/* the following pointers may be changed as long as 'allow_customize' is set */

#ifndef EMULATOR

typedef void *(*malloc_func_t)(size_t);

static void *(*malloc_func)(size_t)         = NULL;

static malloc_func_t const malloc_func_def = malloc;

static void *default_malloc_ex(size_t num, const char *file, int line)

	{ 

		if(malloc_func)

			return malloc_func(num); 

		else

			return malloc_func_def(num);

	}

#else

#define malloc_func libcrypto_ImpurePtr()->malloc_func

void *default_malloc_ex(size_t num, const char *file, int line)

	{ return malloc_func(num); }

#endif

#ifndef EMULATOR

static void *(*malloc_ex_func)(size_t, const char *file, int line)

        = default_malloc_ex;

#else

#define malloc_ex_func libcrypto_ImpurePtr()->malloc_ex_func        

#endif        

#ifndef EMULATOR

typedef void *(*realloc_func_t)(void *, size_t);

static void *(*realloc_func)(void *, size_t)= NULL;

static realloc_func_t const  realloc_func_def = realloc ;

static void *default_realloc_ex(void *str, size_t num,

        const char *file, int line)

	{ 

		if(realloc_func)

			return realloc_func(str,num); 

		else

			return realloc_func_def(str,num);		 

	}

#else

#define realloc_func libcrypto_ImpurePtr()->realloc_func

void *default_realloc_ex(void *str, size_t num,

        const char *file, int line)

	{ return realloc_func(str,num); }

#endif

#ifndef EMULATOR	

static void *(*realloc_ex_func)(void *, size_t, const char *file, int line)

        = default_realloc_ex;

#else

#define realloc_ex_func libcrypto_ImpurePtr()->realloc_ex_func

#endif        

#ifndef EMULATOR

typedef void (*free_func_t)(void *);

static void (*free_func)(void *)            = NULL;

static free_func_t const free_func_def = free;

#else

#define free_func_openssl libcrypto_ImpurePtr()->free_func_openssl

#endif

#ifndef EMULATOR

typedef void *(*malloc_locked_func_t)(size_t);

static void *(*malloc_locked_func)(size_t)  = NULL;

static malloc_locked_func_t const malloc_locked_func_def = malloc;

#else

#define  malloc_locked_func libcrypto_ImpurePtr()->malloc_locked_func

#endif

#ifndef EMULATOR	

static void *default_malloc_locked_ex(size_t num, const char *file, int line)

	{ 

		if(malloc_locked_func)

			return malloc_locked_func(num); 

		else

			return malloc_locked_func_def(num);

		}

static void *(*malloc_locked_ex_func)(size_t, const char *file, int line)

        = default_malloc_locked_ex;

typedef void (*free_locked_func_t)(void *);

static void (*free_locked_func)(void *)     = NULL;

static free_locked_func_t const free_locked_func_def = free;

#else

void *default_malloc_locked_ex(size_t num, const char *file, int line)

	{ return malloc_locked_func(num); }

#define malloc_locked_ex_func libcrypto_ImpurePtr()->malloc_locked_ex_func

#define free_locked_func libcrypto_ImpurePtr()->free_locked_func

#endif

/* 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 */

#ifndef EMULATOR

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

#define malloc_debug_func libcrypto_ImpurePtr()->malloc_debug_func

#define realloc_debug_func libcrypto_ImpurePtr()->realloc_debug_func

#define free_debug_func libcrypto_ImpurePtr()->free_debug_func

#define set_debug_options_func libcrypto_ImpurePtr()->set_debug_options_func

#define get_debug_options_func libcrypto_ImpurePtr()->get_debug_options_func

#endif

#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

EXPORT_C 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;

#ifndef EMULATOR

    free_func=f;

#else	

	free_func_openssl=f;

#endif	

	malloc_locked_func=m; malloc_locked_ex_func=default_malloc_locked_ex;

	free_locked_func=f;

	return 1;

	}

EXPORT_C 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;

#ifndef EMULATOR

    free_func=f;

#else	

	free_func_openssl=f;

#endif	

	malloc_locked_func=0; malloc_locked_ex_func=m;

	free_locked_func=f;

	return 1;

	}

EXPORT_C 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;

	}

EXPORT_C 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;

#ifndef EMULATOR	

    free_func=f;

#else

	free_func_openssl=f;

#endif	

	return 1;

	}

EXPORT_C 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;

	}

EXPORT_C 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) ? 

#ifndef	EMULATOR	

	                     (malloc_func!=NULL?malloc_func:malloc_func_def) : 0;

#else

											 malloc_func : 0;

#endif

	if (r != NULL) *r = (realloc_ex_func == default_realloc_ex) ? 

#ifndef	EMULATOR	

	                     (realloc_func!=NULL?realloc_func:realloc_func_def) : 0;

#else

											 realloc_func : 0;

#endif

#ifndef EMULATOR	

   if (f != NULL) *f=(free_func?free_func:free_func_def);

#else

	if (f != NULL) *f=free_func_openssl;

#endif	

	}

EXPORT_C 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;

	#ifndef EMULATOR	

	if (f != NULL) *f=(free_func?free_func:free_func_def);

	#else

	if (f != NULL) *f=free_func_openssl;

	#endif

	}

EXPORT_C 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) ? 

#ifndef	EMULATOR

	                     (malloc_locked_func?malloc_locked_func:malloc_locked_func_def) : 0;

#else

												malloc_locked_func : 0;

#endif	                     

#ifndef	EMULATOR

	if (f != NULL) *f=(free_locked_func?free_locked_func:free_locked_func_def);

#else

	if (f != NULL) *f=free_locked_func;

#endif	

	}

EXPORT_C 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;

#ifndef	EMULATOR	                    

	if (f != NULL) *f=(free_locked_func?free_locked_func:free_locked_func_def);

#else

	if (f != NULL) *f= free_locked_func;

#endif	

	}

EXPORT_C 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;

	}

#ifdef EMULATOR

unsigned char GET_WSD_VAR_NAME(cleanse_ctr,mem_clr, g)();

#define cleanse_ctr (*GET_WSD_VAR_NAME(cleanse_ctr,mem_clr, g)())

#endif

EXPORT_C 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;

	}

EXPORT_C 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

#ifndef	EMULATOR

	free_locked_func?free_locked_func(str):free_locked_func_def(str);

#else

	free_locked_func(str);

#endif	

	if (free_debug_func != NULL)

		free_debug_func(NULL, 1);

	}

EXPORT_C 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;

	}

EXPORT_C 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;

	}

EXPORT_C 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);

		#ifndef EMULATOR

		free_func?free_func(str):free_func_def(str);

		#else

		free_func_openssl(str);

		#endif

		}

#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;

	}

EXPORT_C 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

#ifndef EMULATOR

	free_func?free_func(str):free_func_def(str);

#else

	free_func_openssl(str);

#endif