File: [local] / src / usr.bin / openssl / prime.c (download)
Revision 1.18, Sun Jul 23 11:39:29 2023 UTC (10 months, 2 weeks ago) by tb
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, HEAD Changes since 1.17: +2 -2 lines
sprinkle some void between () in function definitions
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/* $OpenBSD: prime.c,v 1.18 2023/07/23 11:39:29 tb Exp $ */
/* ====================================================================
* Copyright (c) 2004 The OpenSSL Project. All rights reserved.
*
* 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 above 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 acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED 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 OpenSSL PROJECT OR
* ITS 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.
*
*/
#include <string.h>
#include <limits.h>
#include "apps.h"
#include <openssl/bn.h>
#include <openssl/err.h>
static struct {
int bits;
int checks;
int generate;
int hex;
int safe;
} cfg;
static const struct option prime_options[] = {
{
.name = "bits",
.argname = "n",
.desc = "Number of bits in the generated prime number",
.type = OPTION_ARG_INT,
.opt.value = &cfg.bits,
},
{
.name = "checks",
.argname = "n",
.desc = "Miller-Rabin probabilistic primality test iterations",
.type = OPTION_ARG_INT,
.opt.value = &cfg.checks,
},
{
.name = "generate",
.desc = "Generate a pseudo-random prime number",
.type = OPTION_FLAG,
.opt.flag = &cfg.generate,
},
{
.name = "hex",
.desc = "Hexadecimal prime numbers",
.type = OPTION_FLAG,
.opt.flag = &cfg.hex,
},
{
.name = "safe",
.desc = "Generate only \"safe\" prime numbers",
.type = OPTION_FLAG,
.opt.flag = &cfg.safe,
},
{NULL},
};
static void
prime_usage(void)
{
fprintf(stderr,
"usage: prime [-bits n] [-checks n] [-generate] [-hex] [-safe] "
"p\n");
options_usage(prime_options);
}
int
prime_main(int argc, char **argv)
{
BIGNUM *bn = NULL;
char *prime = NULL;
BIO *bio_out;
char *s;
int is_prime, ret = 1;
if (pledge("stdio rpath", NULL) == -1) {
perror("pledge");
exit(1);
}
memset(&cfg, 0, sizeof(cfg));
/* Default iterations for Miller-Rabin probabilistic primality test. */
cfg.checks = 20;
if (options_parse(argc, argv, prime_options, &prime, NULL) != 0) {
prime_usage();
return (1);
}
if (prime == NULL && cfg.generate == 0) {
BIO_printf(bio_err, "No prime specified.\n");
prime_usage();
return (1);
}
if ((bio_out = BIO_new(BIO_s_file())) == NULL) {
ERR_print_errors(bio_err);
return (1);
}
BIO_set_fp(bio_out, stdout, BIO_NOCLOSE);
if (cfg.generate != 0) {
if (cfg.bits == 0) {
BIO_printf(bio_err, "Specify the number of bits.\n");
goto end;
}
bn = BN_new();
if (!bn) {
BIO_printf(bio_err, "Out of memory.\n");
goto end;
}
if (!BN_generate_prime_ex(bn, cfg.bits,
cfg.safe, NULL, NULL, NULL)) {
BIO_printf(bio_err, "Prime generation error.\n");
goto end;
}
s = cfg.hex ? BN_bn2hex(bn) : BN_bn2dec(bn);
if (s == NULL) {
BIO_printf(bio_err, "Out of memory.\n");
goto end;
}
BIO_printf(bio_out, "%s\n", s);
free(s);
} else {
if (cfg.hex) {
if (!BN_hex2bn(&bn, prime)) {
BIO_printf(bio_err, "%s is an invalid hex "
"value.\n", prime);
goto end;
}
} else {
if (!BN_dec2bn(&bn, prime)) {
BIO_printf(bio_err, "%s is an invalid decimal "
"value.\n", prime);
goto end;
}
}
is_prime = BN_is_prime_ex(bn, cfg.checks, NULL, NULL);
if (is_prime < 0) {
BIO_printf(bio_err, "BN_is_prime_ex failed.\n");
goto end;
}
BIO_printf(bio_out, "%s is %sprime\n", prime,
is_prime == 1 ? "" : "not ");
}
ret = 0;
end:
BN_free(bn);
BIO_free_all(bio_out);
return (ret);
}