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openssl/crypto/bn/bntest.c
Ben Laurie 4da88a8d92 Update dependencies.
1999-05-29 14:10:58 +00:00

1017 lines
19 KiB
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/* crypto/bn/bntest.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 "openssl/e_os.h"
#include <openssl/bio.h>
#include <openssl/bn.h>
#include <openssl/rand.h>
#include <openssl/x509.h>
#include <openssl/err.h>
#ifdef WINDOWS
#include "../bio/bss_file.c"
#endif
int test_add(BIO *bp);
int test_sub(BIO *bp);
int test_lshift1(BIO *bp);
int test_lshift(BIO *bp,BN_CTX *ctx,BIGNUM *a_);
int test_rshift1(BIO *bp);
int test_rshift(BIO *bp,BN_CTX *ctx);
int test_div(BIO *bp,BN_CTX *ctx);
int test_div_recp(BIO *bp,BN_CTX *ctx);
int test_mul(BIO *bp);
int test_sqr(BIO *bp,BN_CTX *ctx);
int test_mont(BIO *bp,BN_CTX *ctx);
int test_mod(BIO *bp,BN_CTX *ctx);
int test_mod_mul(BIO *bp,BN_CTX *ctx);
int test_mod_exp(BIO *bp,BN_CTX *ctx);
int test_exp(BIO *bp,BN_CTX *ctx);
int rand_neg(void);
static int results=0;
#ifdef NO_STDIO
#define APPS_WIN16
#include "bss_file.c"
#endif
static unsigned char lst1[]="\xC6\x4F\x43\x04\x2A\xEA\xCA\x6E\x58\x36\x80\x5B\xE8\xC9"
"\x9B\x04\x5D\x48\x36\xC2\xFD\x16\xC9\x64\xF0";
int main(int argc, char *argv[])
{
BN_CTX *ctx;
BIO *out;
char *outfile=NULL;
srand((unsigned int)time(NULL));
argc--;
argv++;
while (argc >= 1)
{
if (strcmp(*argv,"-results") == 0)
results=1;
else if (strcmp(*argv,"-out") == 0)
{
if (--argc < 1) break;
outfile= *(++argv);
}
argc--;
argv++;
}
ctx=BN_CTX_new();
if (ctx == NULL) exit(1);
out=BIO_new(BIO_s_file());
if (out == NULL) exit(1);
if (outfile == NULL)
{
BIO_set_fp(out,stdout,BIO_NOCLOSE);
}
else
{
if (!BIO_write_filename(out,outfile))
{
perror(outfile);
exit(1);
}
}
if (!results)
BIO_puts(out,"obase=16\nibase=16\n");
fprintf(stderr,"test BN_add\n");
if (!test_add(out)) goto err;
fflush(stdout);
fprintf(stderr,"test BN_sub\n");
if (!test_sub(out)) goto err;
fflush(stdout);
fprintf(stderr,"test BN_lshift1\n");
if (!test_lshift1(out)) goto err;
fflush(stdout);
fprintf(stderr,"test BN_lshift (fixed)\n");
if (!test_lshift(out,ctx,BN_bin2bn(lst1,sizeof(lst1)-1,NULL)))
goto err;
fflush(stdout);
fprintf(stderr,"test BN_lshift\n");
if (!test_lshift(out,ctx,NULL)) goto err;
fflush(stdout);
fprintf(stderr,"test BN_rshift1\n");
if (!test_rshift1(out)) goto err;
fflush(stdout);
fprintf(stderr,"test BN_rshift\n");
if (!test_rshift(out,ctx)) goto err;
fflush(stdout);
fprintf(stderr,"test BN_sqr\n");
if (!test_sqr(out,ctx)) goto err;
fflush(stdout);
fprintf(stderr,"test BN_mul\n");
if (!test_mul(out)) goto err;
fflush(stdout);
fprintf(stderr,"test BN_div\n");
if (!test_div(out,ctx)) goto err;
fflush(stdout);
fprintf(stderr,"test BN_div_recp\n");
if (!test_div_recp(out,ctx)) goto err;
fflush(stdout);
fprintf(stderr,"test BN_mod\n");
if (!test_mod(out,ctx)) goto err;
fflush(stdout);
fprintf(stderr,"test BN_mod_mul\n");
if (!test_mod_mul(out,ctx)) goto err;
fflush(stdout);
/*
fprintf(stderr,"test BN_mont\n");
if (!test_mont(out,ctx)) goto err;
fflush(stdout);
*/
fprintf(stderr,"test BN_mod_exp\n");
if (!test_mod_exp(out,ctx)) goto err;
fflush(stdout);
fprintf(stderr,"test BN_exp\n");
if (!test_exp(out,ctx)) goto err;
fflush(stdout);
/**/
exit(0);
err:
ERR_load_crypto_strings();
ERR_print_errors(out);
exit(1);
return(1);
}
int test_add(BIO *bp)
{
BIGNUM a,b,c;
int i;
int j;
BN_init(&a);
BN_init(&b);
BN_init(&c);
BN_rand(&a,512,0,0);
for (i=0; i<100; i++)
{
BN_rand(&b,450+i,0,0);
a.neg=rand_neg();
b.neg=rand_neg();
if (bp == NULL)
for (j=0; j<10000; j++)
BN_add(&c,&a,&b);
BN_add(&c,&a,&b);
if (bp != NULL)
{
if (!results)
{
BN_print(bp,&a);
BIO_puts(bp," + ");
BN_print(bp,&b);
BIO_puts(bp," - ");
}
BN_print(bp,&c);
BIO_puts(bp,"\n");
}
a.neg=!a.neg;
b.neg=!b.neg;
BN_add(&c,&c,&b);
BN_add(&c,&c,&a);
if(!BN_is_zero(&c))
{
BIO_puts(bp,"Add test failed!\n");
return 0;
}
}
BN_free(&a);
BN_free(&b);
BN_free(&c);
return(1);
}
int test_sub(BIO *bp)
{
BIGNUM a,b,c;
int i;
int j;
BN_init(&a);
BN_init(&b);
BN_init(&c);
BN_rand(&a,512,0,0);
for (i=0; i<100; i++)
{
BN_rand(&b,400+i,0,0);
a.neg=rand_neg();
b.neg=rand_neg();
if (bp == NULL)
for (j=0; j<10000; j++)
BN_sub(&c,&a,&b);
BN_sub(&c,&a,&b);
if (bp != NULL)
{
if (!results)
{
BN_print(bp,&a);
BIO_puts(bp," - ");
BN_print(bp,&b);
BIO_puts(bp," - ");
}
BN_print(bp,&c);
BIO_puts(bp,"\n");
}
BN_add(&c,&c,&b);
BN_sub(&c,&c,&a);
if(!BN_is_zero(&c))
{
BIO_puts(bp,"Subtract test failed!\n");
return 0;
}
}
BN_free(&a);
BN_free(&b);
BN_free(&c);
return(1);
}
int test_div(BIO *bp, BN_CTX *ctx)
{
BIGNUM a,b,c,d,e;
int i;
int j;
BN_init(&a);
BN_init(&b);
BN_init(&c);
BN_init(&d);
BN_init(&e);
BN_rand(&a,400,0,0);
for (i=0; i<100; i++)
{
BN_rand(&b,50+i,0,0);
a.neg=rand_neg();
b.neg=rand_neg();
if (bp == NULL)
for (j=0; j<100; j++)
BN_div(&d,&c,&a,&b,ctx);
BN_div(&d,&c,&a,&b,ctx);
if (bp != NULL)
{
if (!results)
{
BN_print(bp,&a);
BIO_puts(bp," / ");
BN_print(bp,&b);
BIO_puts(bp," - ");
}
BN_print(bp,&d);
BIO_puts(bp,"\n");
if (!results)
{
BN_print(bp,&a);
BIO_puts(bp," % ");
BN_print(bp,&b);
BIO_puts(bp," - ");
}
BN_print(bp,&c);
BIO_puts(bp,"\n");
}
BN_mul(&e,&d,&b,ctx);
BN_add(&d,&e,&c);
BN_sub(&d,&d,&a);
if(!BN_is_zero(&d))
{
BIO_puts(bp,"Division test failed!\n");
return 0;
}
}
BN_free(&a);
BN_free(&b);
BN_free(&c);
BN_free(&d);
BN_free(&e);
return(1);
}
int test_div_recp(BIO *bp, BN_CTX *ctx)
{
BIGNUM a,b,c,d,e;
BN_RECP_CTX recp;
int i;
int j;
BN_RECP_CTX_init(&recp);
BN_init(&a);
BN_init(&b);
BN_init(&c);
BN_init(&d);
BN_init(&e);
BN_rand(&a,400,0,0);
for (i=0; i<100; i++)
{
BN_rand(&b,50+i,0,0);
a.neg=rand_neg();
b.neg=rand_neg();
BN_RECP_CTX_set(&recp,&b,ctx);
if (bp == NULL)
for (j=0; j<100; j++)
BN_div_recp(&d,&c,&a,&recp,ctx);
BN_div_recp(&d,&c,&a,&recp,ctx);
if (bp != NULL)
{
if (!results)
{
BN_print(bp,&a);
BIO_puts(bp," / ");
BN_print(bp,&b);
BIO_puts(bp," - ");
}
BN_print(bp,&d);
BIO_puts(bp,"\n");
if (!results)
{
BN_print(bp,&a);
BIO_puts(bp," % ");
BN_print(bp,&b);
BIO_puts(bp," - ");
}
BN_print(bp,&c);
BIO_puts(bp,"\n");
}
BN_mul(&e,&d,&b,ctx);
BN_add(&d,&e,&c);
BN_sub(&d,&d,&a);
if(!BN_is_zero(&d))
{
BIO_puts(bp,"Reciprocal division test failed!\n");
return 0;
}
}
BN_free(&a);
BN_free(&b);
BN_free(&c);
BN_free(&d);
BN_free(&e);
BN_RECP_CTX_free(&recp);
return(1);
}
int test_mul(BIO *bp)
{
BIGNUM a,b,c,d,e;
int i;
int j;
BN_CTX ctx;
BN_CTX_init(&ctx);
BN_init(&a);
BN_init(&b);
BN_init(&c);
BN_init(&d);
BN_init(&e);
BN_rand(&a,200,0,0);
for (i=0; i<100; i++)
{
BN_rand(&b,250+i,0,0);
BN_rand(&b,200,0,0);
a.neg=rand_neg();
b.neg=rand_neg();
if (bp == NULL)
for (j=0; j<100; j++)
BN_mul(&c,&a,&b,&ctx);
BN_mul(&c,&a,&b,&ctx);
if (bp != NULL)
{
if (!results)
{
BN_print(bp,&a);
BIO_puts(bp," * ");
BN_print(bp,&b);
BIO_puts(bp," - ");
}
BN_print(bp,&c);
BIO_puts(bp,"\n");
}
BN_div(&d,&e,&c,&a,&ctx);
BN_sub(&d,&d,&b);
if(!BN_is_zero(&d) || !BN_is_zero(&e))
{
BIO_puts(bp,"Multiplication test failed!\n");
return 0;
}
}
BN_free(&a);
BN_free(&b);
BN_free(&c);
BN_free(&d);
BN_free(&e);
BN_CTX_free(&ctx);
return(1);
}
int test_sqr(BIO *bp, BN_CTX *ctx)
{
BIGNUM a,c,d,e;
int i;
int j;
BN_init(&a);
BN_init(&c);
BN_init(&d);
BN_init(&e);
for (i=0; i<40; i++)
{
BN_rand(&a,40+i*10,0,0);
a.neg=rand_neg();
if (bp == NULL)
for (j=0; j<100; j++)
BN_sqr(&c,&a,ctx);
BN_sqr(&c,&a,ctx);
if (bp != NULL)
{
if (!results)
{
BN_print(bp,&a);
BIO_puts(bp," * ");
BN_print(bp,&a);
BIO_puts(bp," - ");
}
BN_print(bp,&c);
BIO_puts(bp,"\n");
}
BN_div(&d,&e,&c,&a,ctx);
BN_sub(&d,&d,&a);
if(!BN_is_zero(&d) || !BN_is_zero(&e))
{
BIO_puts(bp,"Square test failed!\n");
return 0;
}
}
BN_free(&a);
BN_free(&c);
BN_free(&d);
BN_free(&e);
return(1);
}
int test_mont(BIO *bp, BN_CTX *ctx)
{
BIGNUM a,b,c,d,A,B;
BIGNUM n;
int i;
int j;
BN_MONT_CTX *mont;
BN_init(&a);
BN_init(&b);
BN_init(&c);
BN_init(&d);
BN_init(&A);
BN_init(&B);
BN_init(&n);
mont=BN_MONT_CTX_new();
BN_rand(&a,100,0,0); /**/
BN_rand(&b,100,0,0); /**/
for (i=0; i<10; i++)
{
BN_rand(&n,(100%BN_BITS2+1)*BN_BITS2*i*BN_BITS2,0,1); /**/
BN_MONT_CTX_set(mont,&n,ctx);
BN_to_montgomery(&A,&a,mont,ctx);
BN_to_montgomery(&B,&b,mont,ctx);
if (bp == NULL)
for (j=0; j<100; j++)
BN_mod_mul_montgomery(&c,&A,&B,mont,ctx);/**/
BN_mod_mul_montgomery(&c,&A,&B,mont,ctx);/**/
BN_from_montgomery(&A,&c,mont,ctx);/**/
if (bp != NULL)
{
if (!results)
{
#ifdef undef
fprintf(stderr,"%d * %d %% %d\n",
BN_num_bits(&a),
BN_num_bits(&b),
BN_num_bits(mont->N));
#endif
BN_print(bp,&a);
BIO_puts(bp," * ");
BN_print(bp,&b);
BIO_puts(bp," % ");
BN_print(bp,&(mont->N));
BIO_puts(bp," - ");
}
BN_print(bp,&A);
BIO_puts(bp,"\n");
}
BN_mod_mul(&d,&a,&b,&n,ctx);
BN_sub(&d,&d,&A);
if(!BN_is_zero(&d))
{
BIO_puts(bp,"Montgomery multiplication test failed!\n");
return 0;
}
}
BN_MONT_CTX_free(mont);
BN_free(&a);
BN_free(&b);
BN_free(&c);
BN_free(&d);
BN_free(&A);
BN_free(&B);
BN_free(&n);
return(1);
}
int test_mod(BIO *bp, BN_CTX *ctx)
{
BIGNUM *a,*b,*c,*d,*e;
int i;
int j;
a=BN_new();
b=BN_new();
c=BN_new();
d=BN_new();
e=BN_new();
BN_rand(a,1024,0,0); /**/
for (i=0; i<20; i++)
{
BN_rand(b,450+i*10,0,0); /**/
a->neg=rand_neg();
b->neg=rand_neg();
if (bp == NULL)
for (j=0; j<100; j++)
BN_mod(c,a,b,ctx);/**/
BN_mod(c,a,b,ctx);/**/
if (bp != NULL)
{
if (!results)
{
BN_print(bp,a);
BIO_puts(bp," % ");
BN_print(bp,b);
BIO_puts(bp," - ");
}
BN_print(bp,c);
BIO_puts(bp,"\n");
}
BN_div(d,e,a,b,ctx);
BN_sub(e,e,c);
if(!BN_is_zero(e))
{
BIO_puts(bp,"Modulo test failed!\n");
return 0;
}
}
BN_free(a);
BN_free(b);
BN_free(c);
BN_free(d);
BN_free(e);
return(1);
}
int test_mod_mul(BIO *bp, BN_CTX *ctx)
{
BIGNUM *a,*b,*c,*d,*e;
int i;
a=BN_new();
b=BN_new();
c=BN_new();
d=BN_new();
e=BN_new();
BN_rand(c,1024,0,0); /**/
for (i=0; i<10; i++)
{
BN_rand(a,475+i*10,0,0); /**/
BN_rand(b,425+i*10,0,0); /**/
a->neg=rand_neg();
b->neg=rand_neg();
/* if (bp == NULL)
for (j=0; j<100; j++)
BN_mod_mul(d,a,b,c,ctx);*/ /**/
if (!BN_mod_mul(e,a,b,c,ctx))
{
unsigned long l;
while ((l=ERR_get_error()))
fprintf(stderr,"ERROR:%s\n",
ERR_error_string(l,NULL));
exit(1);
}
if (bp != NULL)
{
if (!results)
{
BN_print(bp,a);
BIO_puts(bp," * ");
BN_print(bp,b);
BIO_puts(bp," % ");
BN_print(bp,c);
BIO_puts(bp," - ");
}
BN_print(bp,e);
BIO_puts(bp,"\n");
}
BN_mul(d,a,b,ctx);
BN_sub(d,d,e);
BN_div(a,b,d,c,ctx);
if(!BN_is_zero(b))
{
BIO_puts(bp,"Modulo multiply test failed!\n");
return 0;
}
}
BN_free(a);
BN_free(b);
BN_free(c);
BN_free(d);
BN_free(e);
return(1);
}
int test_mod_exp(BIO *bp, BN_CTX *ctx)
{
BIGNUM *a,*b,*c,*d,*e;
int i;
a=BN_new();
b=BN_new();
c=BN_new();
d=BN_new();
e=BN_new();
BN_rand(c,30,0,1); /* must be odd for montgomery */
for (i=0; i<6; i++)
{
BN_rand(a,20+i*5,0,0); /**/
BN_rand(b,2+i,0,0); /**/
if (!BN_mod_exp(d,a,b,c,ctx))
return(00);
if (bp != NULL)
{
if (!results)
{
BN_print(bp,a);
BIO_puts(bp," ^ ");
BN_print(bp,b);
BIO_puts(bp," % ");
BN_print(bp,c);
BIO_puts(bp," - ");
}
BN_print(bp,d);
BIO_puts(bp,"\n");
}
BN_exp(e,a,b,ctx);
BN_sub(e,e,d);
BN_div(a,b,e,c,ctx);
if(!BN_is_zero(b))
{
BIO_puts(bp,"Modulo exponentiation test failed!\n");
return 0;
}
}
BN_free(a);
BN_free(b);
BN_free(c);
BN_free(d);
BN_free(e);
return(1);
}
int test_exp(BIO *bp, BN_CTX *ctx)
{
BIGNUM *a,*b,*d,*e,*one;
int i;
a=BN_new();
b=BN_new();
d=BN_new();
e=BN_new();
one=BN_new();
BN_one(one);
for (i=0; i<6; i++)
{
BN_rand(a,20+i*5,0,0); /**/
BN_rand(b,2+i,0,0); /**/
if (!BN_exp(d,a,b,ctx))
return(00);
if (bp != NULL)
{
if (!results)
{
BN_print(bp,a);
BIO_puts(bp," ^ ");
BN_print(bp,b);
BIO_puts(bp," - ");
}
BN_print(bp,d);
BIO_puts(bp,"\n");
}
BN_one(e);
for( ; !BN_is_zero(b) ; BN_sub(b,b,one))
BN_mul(e,e,a,ctx);
BN_sub(e,e,d);
if(!BN_is_zero(e))
{
BIO_puts(bp,"Exponentiation test failed!\n");
return 0;
}
}
BN_free(a);
BN_free(b);
BN_free(d);
BN_free(e);
BN_free(one);
return(1);
}
int test_lshift(BIO *bp,BN_CTX *ctx,BIGNUM *a_)
{
BIGNUM *a,*b,*c,*d;
int i;
b=BN_new();
c=BN_new();
d=BN_new();
BN_one(c);
if(a_)
a=a_;
else
{
a=BN_new();
BN_rand(a,200,0,0); /**/
a->neg=rand_neg();
}
for (i=0; i<70; i++)
{
BN_lshift(b,a,i+1);
BN_add(c,c,c);
if (bp != NULL)
{
if (!results)
{
BN_print(bp,a);
BIO_puts(bp," * ");
BN_print(bp,c);
BIO_puts(bp," - ");
}
BN_print(bp,b);
BIO_puts(bp,"\n");
}
BN_mul(d,a,c,ctx);
BN_sub(d,d,b);
if(!BN_is_zero(d))
{
BIO_puts(bp,"Left shift test failed!\n");
BIO_puts(bp,"a=");
BN_print(bp,a);
BIO_puts(bp,"\nb=");
BN_print(bp,b);
BIO_puts(bp,"\nc=");
BN_print(bp,c);
BIO_puts(bp,"\nd=");
BN_print(bp,d);
BIO_puts(bp,"\n");
return 0;
}
}
BN_free(a);
BN_free(b);
BN_free(c);
BN_free(d);
return(1);
}
int test_lshift1(BIO *bp)
{
BIGNUM *a,*b,*c;
int i;
a=BN_new();
b=BN_new();
c=BN_new();
BN_rand(a,200,0,0); /**/
a->neg=rand_neg();
for (i=0; i<70; i++)
{
BN_lshift1(b,a);
if (bp != NULL)
{
if (!results)
{
BN_print(bp,a);
BIO_puts(bp," * 2");
BIO_puts(bp," - ");
}
BN_print(bp,b);
BIO_puts(bp,"\n");
}
BN_add(c,a,a);
BN_sub(a,b,c);
if(!BN_is_zero(a))
{
BIO_puts(bp,"Left shift one test failed!\n");
return 0;
}
BN_copy(a,b);
}
BN_free(a);
BN_free(b);
BN_free(c);
return(1);
}
int test_rshift(BIO *bp,BN_CTX *ctx)
{
BIGNUM *a,*b,*c,*d,*e;
int i;
a=BN_new();
b=BN_new();
c=BN_new();
d=BN_new();
e=BN_new();
BN_one(c);
BN_rand(a,200,0,0); /**/
a->neg=rand_neg();
for (i=0; i<70; i++)
{
BN_rshift(b,a,i+1);
BN_add(c,c,c);
if (bp != NULL)
{
if (!results)
{
BN_print(bp,a);
BIO_puts(bp," / ");
BN_print(bp,c);
BIO_puts(bp," - ");
}
BN_print(bp,b);
BIO_puts(bp,"\n");
}
BN_div(d,e,a,c,ctx);
BN_sub(d,d,b);
if(!BN_is_zero(d))
{
BIO_puts(bp,"Right shift test failed!\n");
return 0;
}
}
BN_free(a);
BN_free(b);
BN_free(c);
BN_free(d);
BN_free(e);
return(1);
}
int test_rshift1(BIO *bp)
{
BIGNUM *a,*b,*c;
int i;
a=BN_new();
b=BN_new();
c=BN_new();
BN_rand(a,200,0,0); /**/
a->neg=rand_neg();
for (i=0; i<70; i++)
{
BN_rshift1(b,a);
if (bp != NULL)
{
if (!results)
{
BN_print(bp,a);
BIO_puts(bp," / 2");
BIO_puts(bp," - ");
}
BN_print(bp,b);
BIO_puts(bp,"\n");
}
BN_sub(c,a,b);
BN_sub(c,c,b);
if(!BN_is_zero(c) && !BN_is_one(c))
{
BIO_puts(bp,"Right shift one test failed!\n");
return 0;
}
BN_copy(a,b);
}
BN_free(a);
BN_free(b);
BN_free(c);
return(1);
}
int rand_neg(void)
{
static unsigned int neg=0;
static int sign[8]={0,0,0,1,1,0,1,1};
return(sign[(neg++)%8]);
}
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