/* crypto/rand/rand_lib.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 <time.h>

 #include "cryptlib.h"

 #include <openssl/rand.h>

 #ifndef OPENSSL_NO_ENGINE

 #include <openssl/engine.h>

 #endif

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

 #include "libcrypto_wsd_macros.h"

 #include "libcrypto_wsd.h"

 #endif

 #ifndef OPENSSL_NO_ENGINE

 /* non-NULL if default_RAND_meth is ENGINE-provided */

 static ENGINE *funct_ref =NULL;

 #endif

 #ifndef EMULATOR

 static const RAND_METHOD *default_RAND_meth = NULL;

 #else

 GET_STATIC_VAR_FROM_TLS(default_RAND_meth,rand_lib,const RAND_METHOD *)

 #define default_RAND_meth (*GET_WSD_VAR_NAME(default_RAND_meth,rand_lib, s)())

 #endif

 EXPORT_C int RAND_set_rand_method(const RAND_METHOD *meth)

 	{

 #ifndef OPENSSL_NO_ENGINE

 	if(funct_ref)

 		{

 		ENGINE_finish(funct_ref);

 		funct_ref = NULL;

 		}

 #endif

 	default_RAND_meth = meth;

 	return 1;

 	}

 EXPORT_C const RAND_METHOD *RAND_get_rand_method(void)

 	{

 	if (!default_RAND_meth)

 		{

 #ifndef OPENSSL_NO_ENGINE

 		ENGINE *e = ENGINE_get_default_RAND();

 		if(e)

 			{

 			default_RAND_meth = ENGINE_get_RAND(e);

 			if(!default_RAND_meth)

 				{

 				ENGINE_finish(e);

 				e = NULL;

 				}

 			}

 		if(e)

 			funct_ref = e;

 		else

 #endif

 			default_RAND_meth = RAND_SSLeay();

 		}

 	return default_RAND_meth;

 	}

 #ifndef OPENSSL_NO_ENGINE

 EXPORT_C int RAND_set_rand_engine(ENGINE *engine)

 	{

 	const RAND_METHOD *tmp_meth = NULL;

 	if(engine)

 		{

 		if(!ENGINE_init(engine))

 			return 0;

 		tmp_meth = ENGINE_get_RAND(engine);

 		if(!tmp_meth)

 			{

 			ENGINE_finish(engine);

 			return 0;

 			}

 		}

 	/* This function releases any prior ENGINE so call it first */

 	RAND_set_rand_method(tmp_meth);

 	funct_ref = engine;

 	return 1;

 	}

 #endif

 EXPORT_C void RAND_cleanup(void)

 	{

 	const RAND_METHOD *meth = RAND_get_rand_method();

 	if (meth && meth->cleanup)

 		meth->cleanup();

 	RAND_set_rand_method(NULL);

 	}

 EXPORT_C void RAND_seed(const void *buf, int num)

 	{

 	const RAND_METHOD *meth = RAND_get_rand_method();

 	if (meth && meth->seed)

 		meth->seed(buf,num);

 	}

 EXPORT_C void RAND_add(const void *buf, int num, double entropy)

 	{

 	const RAND_METHOD *meth = RAND_get_rand_method();

 	if (meth && meth->add)

 		meth->add(buf,num,entropy);

 	}

 EXPORT_C int RAND_bytes(unsigned char *buf, int num)

 	{

 	const RAND_METHOD *meth = RAND_get_rand_method();

 	if (meth && meth->bytes)

 		return meth->bytes(buf,num);

 	return(-1);

 	}

 EXPORT_C int RAND_pseudo_bytes(unsigned char *buf, int num)

 	{

 	const RAND_METHOD *meth = RAND_get_rand_method();

 	if (meth && meth->pseudorand)

 		return meth->pseudorand(buf,num);

 	return(-1);

 	}

 EXPORT_C int RAND_status(void)

 	{

 	const RAND_METHOD *meth = RAND_get_rand_method();

 	if (meth && meth->status)

 		return meth->status();

 	return 0;

 	}