/* 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.]
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../e_os.h"
#include <openssl/bio.h>
#include <openssl/bn.h>
#include <openssl/rand.h>
#include <openssl/err.h>
#define NUM_BITS (BN_BITS*2)
static const char rnd_seed[] = "string to make the random number generator think it has entropy";
int main(int argc, char *argv[])
{
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;
RAND_seed(rnd_seed, sizeof rnd_seed); /* or BN_rand may fail, and we don't
* even check its return value
* (which we should) */
ERR_load_BN_strings();
ctx=BN_CTX_new();
if (ctx == NULL) EXIT(1);
r_mont=BN_new();
r_mont_const=BN_new();
r_recp=BN_new();
r_simple=BN_new();
a=BN_new();
b=BN_new();
m=BN_new();
if ( (r_mont == NULL) || (r_recp == NULL) ||
(a == NULL) || (b == NULL))
goto err;
out=BIO_new(BIO_s_file());
if (out == NULL) EXIT(1);
BIO_set_fp(out,stdout,BIO_NOCLOSE);
for (i=0; i<200; i++)
{
RAND_bytes(&c,1);
c=(c%BN_BITS)-BN_BITS2;
BN_rand(a,NUM_BITS+c,0,0);
RAND_bytes(&c,1);
c=(c%BN_BITS)-BN_BITS2;
BN_rand(b,NUM_BITS+c,0,0);
RAND_bytes(&c,1);
c=(c%BN_BITS)-BN_BITS2;
BN_rand(m,NUM_BITS+c,0,1);
BN_mod(a,a,m,ctx);
BN_mod(b,b,m,ctx);
ret=BN_mod_exp_mont(r_mont,a,b,m,ctx,NULL);
if (ret <= 0)
{
printf("BN_mod_exp_mont() problems\n");
ERR_print_errors(out);
EXIT(1);
}
ret=BN_mod_exp_recp(r_recp,a,b,m,ctx);
if (ret <= 0)
{
printf("BN_mod_exp_recp() problems\n");
ERR_print_errors(out);
EXIT(1);
}
ret=BN_mod_exp_simple(r_simple,a,b,m,ctx);
if (ret <= 0)
{
printf("BN_mod_exp_simple() problems\n");
ERR_print_errors(out);
EXIT(1);
}
ret=BN_mod_exp_mont_consttime(r_mont_const,a,b,m,ctx,NULL);
if (ret <= 0)
{
printf("BN_mod_exp_mont_consttime() problems\n");
ERR_print_errors(out);
EXIT(1);
}
if (BN_cmp(r_simple, r_mont) == 0
&& BN_cmp(r_simple,r_recp) == 0
&& BN_cmp(r_simple,r_mont_const) == 0)
{
printf(".");
fflush(stdout);
}
else
{
if (BN_cmp(r_simple,r_mont) != 0)
printf("\nsimple and mont results differ\n");
if (BN_cmp(r_simple,r_mont_const) != 0)
printf("\nsimple and mont const time results differ\n");
if (BN_cmp(r_simple,r_recp) != 0)
printf("\nsimple and recp results differ\n");
printf("a (%3d) = ",BN_num_bits(a)); BN_print(out,a);
printf("\nb (%3d) = ",BN_num_bits(b)); BN_print(out,b);
printf("\nm (%3d) = ",BN_num_bits(m)); BN_print(out,m);
printf("\nsimple ="); BN_print(out,r_simple);
printf("\nrecp ="); BN_print(out,r_recp);
printf("\nmont ="); BN_print(out,r_mont);
printf("\nmont_ct ="); BN_print(out,r_mont_const);
printf("\n");
EXIT(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_thread_state(NULL);
CRYPTO_mem_leaks(out);
BIO_free(out);
printf(" done\n");
EXIT(0);
err:
ERR_load_crypto_strings();
ERR_print_errors(out);
#ifdef OPENSSL_SYS_NETWARE
printf("ERROR\n");
#endif
EXIT(1);
return(1);
}