/* crypto/cryptlib.c */

/* ====================================================================

 * Copyright (c) 1998-2003 The OpenSSL Project.  All rights reserved.

 *

 * 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 above 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 acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"

 *

 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

 *    endorse or promote products derived from this software without

 *    prior written permission. For written permission, please contact

 *    openssl-core@openssl.org.

 *

 * 5. Products derived from this software may not be called "OpenSSL"

 *    nor may "OpenSSL" appear in their names without prior written

 *    permission of the OpenSSL Project.

 *

 * 6. Redistributions of any form whatsoever must retain the following

 *    acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"

 *

 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED 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 OpenSSL PROJECT OR

 * ITS 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.

 * ====================================================================

 *

 * This product includes cryptographic software written by Eric Young

 * (eay@cryptsoft.com).  This product includes software written by Tim

 * Hudson (tjh@cryptsoft.com).

 *

 */

/* 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.]

 */

/* ====================================================================

 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.

 * ECDH support in OpenSSL originally developed by 

 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.

 */

 /*

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

 */

#include "cryptlib.h"

#include <openssl/safestack.h>

#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)

static double SSLeay_MSVC5_hack=0.0; /* and for VC1.5 */

#endif

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

#include "libcrypto_wsd_macros.h"

#include "libcrypto_wsd.h"

#endif

DECLARE_STACK_OF(CRYPTO_dynlock)

IMPLEMENT_STACK_OF(CRYPTO_dynlock)

/* real #defines in crypto.h, keep these upto date */

#ifndef EMULATOR

static const char* lock_names[CRYPTO_NUM_LOCKS] =

	{

	"<<ERROR>>",

	"err",

	"ex_data",

	"x509",

	"x509_info",

	"x509_pkey",

	"x509_crl",

	"x509_req",

	"dsa",

	"rsa",

	"evp_pkey",

	"x509_store",

	"ssl_ctx",

	"ssl_cert",

	"ssl_session",

	"ssl_sess_cert",

	"ssl",

	"ssl_method",

	"rand",

	"rand2",

	"debug_malloc",

	"BIO",

	"gethostbyname",

	"getservbyname",

	"readdir",

	"RSA_blinding",

	"dh",

	"debug_malloc2",

	"dso",

	"dynlock",

	"engine",

	"ui",

	"ecdsa",

	"ec",

	"ecdh",

	"bn",

	"ec_pre_comp",

	"store",

	"comp",

#if CRYPTO_NUM_LOCKS != 39

# error "Inconsistency between crypto.h and cryptlib.c"

#endif

	};

#else

static const char *const lock_names[CRYPTO_NUM_LOCKS] =

	{

	"<<ERROR>>",

	"err",

	"ex_data",

	"x509",

	"x509_info",

	"x509_pkey",

	"x509_crl",

	"x509_req",

	"dsa",

	"rsa",

	"evp_pkey",

	"x509_store",

	"ssl_ctx",

	"ssl_cert",

	"ssl_session",

	"ssl_sess_cert",

	"ssl",

	"ssl_method",

	"rand",

	"rand2",

	"debug_malloc",

	"BIO",

	"gethostbyname",

	"getservbyname",

	"readdir",

	"RSA_blinding",

	"dh",

	"debug_malloc2",

	"dso",

	"dynlock",

	"engine",

	"ui",

	"ecdsa",

	"ec",

	"ecdh",

	"bn",

	"ec_pre_comp",

	"store",

	"comp",

#if CRYPTO_NUM_LOCKS != 39

# error "Inconsistency between crypto.h and cryptlib.c"

#endif

	};

#endif //EMULATOR

#ifndef EMULATOR

/* This is for applications to allocate new type names in the non-dynamic

   array of lock names.  These are numbered with positive numbers.  */

static STACK *app_locks=NULL;

/* For applications that want a more dynamic way of handling threads, the

   following stack is used.  These are externally numbered with negative

   numbers.  */

static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;

#else

 GET_STATIC_VAR_FROM_TLS(app_locks,cryptlib,STACK *)

 #define app_locks (*GET_WSD_VAR_NAME(app_locks,cryptlib,s)())

 GET_STATIC_VAR_FROM_TLS(dyn_locks,cryptlib,STACK_OF(CRYPTO_dynlock)*)

 #define dyn_locks (*GET_WSD_VAR_NAME(dyn_locks,cryptlib,s)())

#endif

#ifndef EMULATOR

static void (MS_FAR *locking_callback)(int mode,int type,

	const char *file,int line)=NULL;

static int (MS_FAR *add_lock_callback)(int *pointer,int amount,

	int type,const char *file,int line)=NULL;

static unsigned long (MS_FAR *id_callback)(void)=NULL;

static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)

	(const char *file,int line)=NULL;

static void (MS_FAR *dynlock_lock_callback)(int mode,

	struct CRYPTO_dynlock_value *l, const char *file,int line)=NULL;

static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,

	const char *file,int line)=NULL;

#else

#define locking_callback libcrypto_ImpurePtr()->locking_callback

#define add_lock_callback libcrypto_ImpurePtr()->add_lock_callback

#define id_callback libcrypto_ImpurePtr()->id_callback

#define dynlock_create_callback libcrypto_ImpurePtr()->dynlock_create_callback

#define dynlock_lock_callback libcrypto_ImpurePtr()->dynlock_lock_callback

#define dynlock_destroy_callback libcrypto_ImpurePtr()->dynlock_destroy_callback

#endif	

EXPORT_C int CRYPTO_get_new_lockid(char *name)

	{

	char *str;

	int i;

#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)

	/* A hack to make Visual C++ 5.0 work correctly when linking as

	 * a DLL using /MT. Without this, the application cannot use

	 * and floating point printf's.

	 * It also seems to be needed for Visual C 1.5 (win16) */

	SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];

#endif

	if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))

		{

		CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);

		return(0);

		}

	if ((str=BUF_strdup(name)) == NULL)

		{

		CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);

		return(0);

		}

	i=sk_push(app_locks,str);

	if (!i)

		OPENSSL_free(str);

	else

		i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */

	return(i);

	}

EXPORT_C int CRYPTO_num_locks(void)

	{

	return CRYPTO_NUM_LOCKS;

	}

EXPORT_C int CRYPTO_get_new_dynlockid(void)

	{

	int i = 0;

	CRYPTO_dynlock *pointer = NULL;

	if (dynlock_create_callback == NULL)

		{

		CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);

		return(0);

		}

	CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);

	if ((dyn_locks == NULL)&&((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))

		{

		CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);

		CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);

		return(0);

		}

	CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);

	pointer = (CRYPTO_dynlock *)OPENSSL_malloc(sizeof(CRYPTO_dynlock));

	if (pointer == NULL)

		{

		CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);

		return(0);

		}

	pointer->references = 1;

	pointer->data = dynlock_create_callback(__FILE__,__LINE__);

	if (pointer->data == NULL)

		{

		OPENSSL_free(pointer);

		CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);

		return(0);

		}

	CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);

	/* First, try to find an existing empty slot */

	i=sk_CRYPTO_dynlock_find(dyn_locks,NULL);

	/* If there was none, push, thereby creating a new one */

	if (i == -1)

		/* Since sk_push() returns the number of items on the

		   stack, not the location of the pushed item, we need

		   to transform the returned number into a position,

		   by decreasing it.  */

		i=sk_CRYPTO_dynlock_push(dyn_locks,pointer) - 1;

	else

		/* If we found a place with a NULL pointer, put our pointer

		   in it.  */

		(void)sk_CRYPTO_dynlock_set(dyn_locks,i,pointer);

	CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);

	if (i == -1)

		{

		dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);

		OPENSSL_free(pointer);

		}

	else

		i += 1; /* to avoid 0 */

	return -i;

	}

EXPORT_C void CRYPTO_destroy_dynlockid(int i)

	{

	CRYPTO_dynlock *pointer = NULL;

	if (i)

		i = -i-1;

	if (dynlock_destroy_callback == NULL)

		return;

	CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);

	if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))

		{

		CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);

		return;

		}

	pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);

	if (pointer != NULL)

		{

		--pointer->references;

#ifdef REF_CHECK

		if (pointer->references < 0)

			{

			fprintf(stderr,"CRYPTO_destroy_dynlockid, bad reference count\n");

			abort();

			}

		else

#endif

			if (pointer->references <= 0)

				{

				(void)sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);

				}

			else

				pointer = NULL;

		}

	CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);

	if (pointer)

		{

		dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);

		OPENSSL_free(pointer);

		}

	}

EXPORT_C struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)

	{

	CRYPTO_dynlock *pointer = NULL;

	if (i)

		i = -i-1;

	CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);

	if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))

		pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);

	if (pointer)

		pointer->references++;

	CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);

	if (pointer)

		return pointer->data;

	return NULL;

	}

EXPORT_C struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))

	(const char *file,int line)

	{

	return(dynlock_create_callback);

	}

EXPORT_C void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,

	struct CRYPTO_dynlock_value *l, const char *file,int line)

	{

	return(dynlock_lock_callback);

	}

EXPORT_C void (*CRYPTO_get_dynlock_destroy_callback(void))

	(struct CRYPTO_dynlock_value *l, const char *file,int line)

	{

	return(dynlock_destroy_callback);

	}

EXPORT_C void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)

	(const char *file, int line))

	{

	dynlock_create_callback=func;

	}

EXPORT_C void CRYPTO_set_dynlock_lock_callback(void (*func)(int mode,

	struct CRYPTO_dynlock_value *l, const char *file, int line))

	{

	dynlock_lock_callback=func;

	}

EXPORT_C void CRYPTO_set_dynlock_destroy_callback(void (*func)

	(struct CRYPTO_dynlock_value *l, const char *file, int line))

	{

	dynlock_destroy_callback=func;

	}

EXPORT_C void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,

		int line)

	{

	return(locking_callback);

	}

EXPORT_C int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,

					  const char *file,int line)

	{

	return(add_lock_callback);

	}

EXPORT_C void CRYPTO_set_locking_callback(void (*func)(int mode,int type,

					      const char *file,int line))

	{

	locking_callback=func;

	}

EXPORT_C void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,

					      const char *file,int line))

	{

	add_lock_callback=func;

	}

EXPORT_C unsigned long (*CRYPTO_get_id_callback(void))(void)

	{

	return(id_callback);

	}

EXPORT_C void CRYPTO_set_id_callback(unsigned long (*func)(void))

	{

	id_callback=func;

	}

EXPORT_C unsigned long CRYPTO_thread_id(void)

	{

	unsigned long ret=0;

	if (id_callback == NULL)

		{

#ifdef OPENSSL_SYS_WIN16

		ret=(unsigned long)GetCurrentTask();

#elif defined(OPENSSL_SYS_WIN32)

		ret=(unsigned long)GetCurrentThreadId();

#elif defined(GETPID_IS_MEANINGLESS)

		ret=1L;

#else

		//ret=(unsigned long)getpid();

		//ret=(unsigned long)getpid(;

#endif

		}

	else

		ret=id_callback();

	return(ret);

	}

EXPORT_C void CRYPTO_lock(int mode, int type, const char *file, int line)

	{

#ifdef LOCK_DEBUG

		{

		char *rw_text,*operation_text;

		if (mode & CRYPTO_LOCK)

			operation_text="lock  ";

		else if (mode & CRYPTO_UNLOCK)

			operation_text="unlock";