/* 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	

 	if (free_debug_func != NULL)

 		free_debug_func(NULL, 1);

 	}

 EXPORT_C 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);

 	}

 EXPORT_C void CRYPTO_set_mem_debug_options(long bits)

 	{

 	if (set_debug_options_func != NULL)

 		set_debug_options_func(bits);

 	}

 EXPORT_C long CRYPTO_get_mem_debug_options(void)

 	{

 	if (get_debug_options_func != NULL)

 		return get_debug_options_func();

 	return 0;

 	}