/* crypto/bn/exptest.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 <string.h>

#ifndef SYMBIAN

#include "../e_os.h"

#else

#include "e_os.h"

#endif

#include <openssl/bio.h>

#include <openssl/bn.h>

#include <openssl/rand.h>

#include <openssl/err.h>

#ifdef SYMBIAN

#ifdef stdin

#undef stdin

#endif

#ifdef stdout

#undef stdout

#endif

#ifdef stderr

#undef stderr

#endif

#define stdin fp_stdin

#define stdout fp_stdout

#define stderr fp_stderr

extern FILE *fp_stdout;

extern FILE *fp_stderr;

#endif

#define NUM_BITS	(BN_BITS*2)

static const char rnd_seed[] = "string to make the random number generator think it has entropy";

#ifndef SYMBIAN

int main(int argc, char *argv[])

#else

int exp_main(int argc, char *argv[])

#endif

	{

	BN_CTX *ctx;

	BIO *out=NULL;

	int i,ret;

	unsigned char c;

	BIGNUM *r_mont,*r_mont_const,*r_recp,*r_simple,*a,*b,*m;

	//	FILE* temp;

	RAND_seed(rnd_seed, sizeof rnd_seed); /* or BN_rand may fail, and we don't

	                                       * even check its return value

	                                       * (which we should) */

  if(errno==ENOMEM)

  {

	  return 1;

  }	                                       

	ERR_load_BN_strings();

	if(errno==ENOMEM)

    {

	  return 1;

	}	    

	ctx=BN_CTX_new();

	if (ctx == NULL)

	{

	 if(errno==ENOMEM)

     {

	  return 1;

	 }

	 return 1;	    

	} 

	r_mont=BN_new();

	if(r_mont==NULL&&errno==ENOMEM)

    {

	  return 1;

	}	    

	r_mont_const=BN_new();

	if(r_mont_const==NULL&&errno==ENOMEM)

  {

	  return 1;

	}	    

	r_recp=BN_new();

	if(r_recp==NULL&&errno==ENOMEM)

   {

	  return 1;

	}	    

	r_simple=BN_new();

	if(r_simple==NULL&&errno==ENOMEM)

  {

	  return 1;

	}	    

	a=BN_new();

	if(a==NULL&&errno==ENOMEM)

  {

	  return 1;

	}	    

	b=BN_new();

	if(b==NULL&&errno==ENOMEM)

  {

	  return 1;

	}	    

	m=BN_new();

	if(m==NULL&&errno==ENOMEM)

  {

	  return 1;

	}	    

	if (	(r_mont == NULL) || (r_recp == NULL) ||

		(a == NULL) || (b == NULL))

		goto err;

	out=BIO_new(BIO_s_file());

	if(out==NULL&&errno==ENOMEM)

  {

	  return 1;

	}	    

	if (out == NULL) 

	return 1;

	BIO_set_fp(out,stdout,BIO_NOCLOSE);

	if(errno==ENOMEM)

  {

	  return 1;

	}	    

// temp = fopen("sanjeev.txt", "w");

	for (i=0; i<200; i++)

		{

	//	fputc(i,temp);

		RAND_bytes(&c,1);

  	if(errno==ENOMEM)

    {

	    return 1;

	  }	    

		c=(c%BN_BITS)-BN_BITS2;

		BN_rand(a,NUM_BITS+c,0,0);

		if(errno==ENOMEM)

    {

	   return 1;

	  }	    

		RAND_bytes(&c,1);

  	if(errno==ENOMEM)

    {

	    return 1;

	  }	    

		c=(c%BN_BITS)-BN_BITS2;

		BN_rand(b,NUM_BITS+c,0,0);

  	if(errno==ENOMEM)

    {

	    return 1;

	  }	    

		RAND_bytes(&c,1);

		if(errno==ENOMEM)

    {

	   return 1;

	  }	    

		c=(c%BN_BITS)-BN_BITS2;

		BN_rand(m,NUM_BITS+c,0,1);

		if(errno==ENOMEM)

    {

	   return 1;

	  }	    

		BN_mod(a,a,m,ctx);

		if(errno==ENOMEM)

    {

	   return 1;

	  }	    

		BN_mod(b,b,m,ctx);

		if(errno==ENOMEM)

      {

	   return 1;

	  }	    

		ret=BN_mod_exp_mont(r_mont,a,b,m,ctx,NULL);

		if (ret <= 0)

			{

			if(errno==ENOMEM)

      {

	     return 1;

	    }	    

			fprintf(stdout,"BN_mod_exp_mont() problems\n");

			ERR_print_errors(out);

  		if(errno==ENOMEM)

      {

	     return 1;

	    }	    

			return 1;

			}

		ret=BN_mod_exp_recp(r_recp,a,b,m,ctx);

		if (ret <= 0)

			{

  		if(errno==ENOMEM)

       {

	       return 1;

	     }	    

			fprintf(stdout,"BN_mod_exp_recp() problems\n");

			ERR_print_errors(out);

			if(errno==ENOMEM)

      {

	    return 1;

	    }	    

			return 1;

			}

		ret=BN_mod_exp_simple(r_simple,a,b,m,ctx);

		if (ret <= 0)

			{

  		if(errno==ENOMEM)

       {

	       return 1;

	     }	    

			fprintf(stdout,"BN_mod_exp_simple() problems\n");

			ERR_print_errors(out);

  		if(errno==ENOMEM)

       {

	       return 1;

	     }	    

			return 1;

			}

		ret=BN_mod_exp_mont_consttime(r_mont_const,a,b,m,ctx,NULL);

		if (ret <= 0)

			{

  		if(errno==ENOMEM)

       {

	       return 1;

	     }	    

			fprintf(stdout,"BN_mod_exp_mont_consttime() problems\n");

			ERR_print_errors(out);

  		if(errno==ENOMEM)

       {

	       return 1;

	     }	    

			return 1;

			}

		if (BN_cmp(r_simple, r_mont) == 0

		    && BN_cmp(r_simple,r_recp) == 0

			&& BN_cmp(r_simple,r_mont_const) == 0)

			{

  		if(errno==ENOMEM)

       {

	       return 1;

	     }	    

      fprintf(stdout,".");

			fflush(stdout);

			}

		else

		  	{

			if (BN_cmp(r_simple,r_mont) != 0)

       {

 	  		if(errno==ENOMEM)

        {

	        return 1;

	      }	    

				fprintf(stdout,"\nsimple and mont results differ\n");

       }				

			if (BN_cmp(r_simple,r_mont) != 0)

			{

 	  		if(errno==ENOMEM)

        {

	        return 1;

	      }	    

				fprintf(stdout,"\nsimple and mont const time results differ\n");

			}	

			if (BN_cmp(r_simple,r_recp) != 0)

			{

 	  		if(errno==ENOMEM)

        {

	        return 1;

	      }	    

				fprintf(stdout,"\nsimple and recp results differ\n");

      }

			fprintf(stdout,"a (%3d) = ",BN_num_bits(a));   BN_print(out,a);

  		if(errno==ENOMEM)

      {

	       return 1;

      }	    

			fprintf(stdout,"\nb (%3d) = ",BN_num_bits(b)); BN_print(out,b);

 	  	if(errno==ENOMEM)

      {

	       return 1;

      }	    

			fprintf(stdout,"\nm (%3d) = ",BN_num_bits(m)); BN_print(out,m);

 	  	if(errno==ENOMEM)

      {

	       return 1;

      }	    

			fprintf(stdout,"\nsimple   =");	BN_print(out,r_simple);

 	  	if(errno==ENOMEM)

      {

	       return 1;

      }	    

			fprintf(stdout,"\nrecp     =");	BN_print(out,r_recp);

 	  	if(errno==ENOMEM)

      {

	       return 1;

      }	    

			fprintf(stdout,"\nmont     ="); BN_print(out,r_mont);

 	  	if(errno==ENOMEM)

      {

	       return 1;

      }	    

			fprintf(stdout,"\nmont_ct  ="); BN_print(out,r_mont_const);

 	  	if(errno==ENOMEM)

      {

	       return 1;

      }	    

			fprintf(stdout,"\n");

			return 1;

			}

		}

	BN_free(r_mont);

	BN_free(r_mont_const);

	BN_free(r_recp);

	BN_free(r_simple);

	BN_free(a);

	BN_free(b);

	BN_free(m);

	BN_CTX_free(ctx);

	ERR_remove_state(0);

	if(errno==ENOMEM)

  {

    return 1;

  }	    

	CRYPTO_mem_leaks(out);

	if(errno==ENOMEM)

  {

    return 1;

  }	    

	BIO_free(out);

	if(errno==ENOMEM)

   {

	  return 1;

	 }    

    CRYPTO_cleanup_all_ex_data();

   if(errno==ENOMEM)

   {

	  return 1;

	 }    

	fprintf(stdout," done\n");

	fprintf(stdout," Test case passed\n");

	return 0;

err:

	ERR_load_crypto_strings();

	if(errno==ENOMEM)

  {

    return 1;

  }	    

	ERR_print_errors(out);

	if(errno==ENOMEM)

  {

    return 1;

  }	    

#ifdef OPENSSL_SYS_NETWARE

    fprintf(stdout,"ERROR\n");

#endif

	return(1);

	}