205 lines
6.3 KiB
C
205 lines
6.3 KiB
C
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/* crypto/bn/exptest.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "../e_os.h"
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#include <openssl/bio.h>
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#include <openssl/bn.h>
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#include <openssl/rand.h>
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#include <openssl/err.h>
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#define NUM_BITS (BN_BITS*2)
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static const char rnd_seed[] = "string to make the random number generator think it has entropy";
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int main(int argc, char *argv[])
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{
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BN_CTX *ctx;
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BIO *out=NULL;
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int i,ret;
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unsigned char c;
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BIGNUM *r_mont,*r_mont_const,*r_recp,*r_simple,*a,*b,*m;
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RAND_seed(rnd_seed, sizeof rnd_seed); /* or BN_rand may fail, and we don't
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* even check its return value
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* (which we should) */
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ERR_load_BN_strings();
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ctx=BN_CTX_new();
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if (ctx == NULL) EXIT(1);
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r_mont=BN_new();
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r_mont_const=BN_new();
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r_recp=BN_new();
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r_simple=BN_new();
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a=BN_new();
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b=BN_new();
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m=BN_new();
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if ( (r_mont == NULL) || (r_recp == NULL) ||
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(a == NULL) || (b == NULL))
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goto err;
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out=BIO_new(BIO_s_file());
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if (out == NULL) EXIT(1);
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BIO_set_fp(out,stdout,BIO_NOCLOSE);
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for (i=0; i<200; i++)
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{
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RAND_bytes(&c,1);
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c=(c%BN_BITS)-BN_BITS2;
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BN_rand(a,NUM_BITS+c,0,0);
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RAND_bytes(&c,1);
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c=(c%BN_BITS)-BN_BITS2;
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BN_rand(b,NUM_BITS+c,0,0);
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RAND_bytes(&c,1);
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c=(c%BN_BITS)-BN_BITS2;
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BN_rand(m,NUM_BITS+c,0,1);
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BN_mod(a,a,m,ctx);
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BN_mod(b,b,m,ctx);
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ret=BN_mod_exp_mont(r_mont,a,b,m,ctx,NULL);
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if (ret <= 0)
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{
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printf("BN_mod_exp_mont() problems\n");
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ERR_print_errors(out);
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EXIT(1);
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}
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ret=BN_mod_exp_recp(r_recp,a,b,m,ctx);
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if (ret <= 0)
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{
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printf("BN_mod_exp_recp() problems\n");
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ERR_print_errors(out);
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EXIT(1);
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}
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ret=BN_mod_exp_simple(r_simple,a,b,m,ctx);
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if (ret <= 0)
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{
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printf("BN_mod_exp_simple() problems\n");
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ERR_print_errors(out);
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EXIT(1);
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}
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ret=BN_mod_exp_mont_consttime(r_mont_const,a,b,m,ctx,NULL);
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if (ret <= 0)
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{
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printf("BN_mod_exp_mont_consttime() problems\n");
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ERR_print_errors(out);
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EXIT(1);
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}
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if (BN_cmp(r_simple, r_mont) == 0
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&& BN_cmp(r_simple,r_recp) == 0
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&& BN_cmp(r_simple,r_mont_const) == 0)
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{
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printf(".");
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fflush(stdout);
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}
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else
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{
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if (BN_cmp(r_simple,r_mont) != 0)
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printf("\nsimple and mont results differ\n");
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if (BN_cmp(r_simple,r_mont_const) != 0)
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printf("\nsimple and mont const time results differ\n");
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if (BN_cmp(r_simple,r_recp) != 0)
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printf("\nsimple and recp results differ\n");
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printf("a (%3d) = ",BN_num_bits(a)); BN_print(out,a);
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printf("\nb (%3d) = ",BN_num_bits(b)); BN_print(out,b);
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printf("\nm (%3d) = ",BN_num_bits(m)); BN_print(out,m);
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printf("\nsimple ="); BN_print(out,r_simple);
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printf("\nrecp ="); BN_print(out,r_recp);
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printf("\nmont ="); BN_print(out,r_mont);
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printf("\nmont_ct ="); BN_print(out,r_mont_const);
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printf("\n");
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EXIT(1);
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}
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}
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BN_free(r_mont);
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BN_free(r_mont_const);
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BN_free(r_recp);
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BN_free(r_simple);
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BN_free(a);
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BN_free(b);
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BN_free(m);
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BN_CTX_free(ctx);
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ERR_remove_thread_state(NULL);
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CRYPTO_mem_leaks(out);
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BIO_free(out);
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printf(" done\n");
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EXIT(0);
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err:
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ERR_load_crypto_strings();
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ERR_print_errors(out);
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#ifdef OPENSSL_SYS_NETWARE
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printf("ERROR\n");
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#endif
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EXIT(1);
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return(1);
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}
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