openssl1.0/apps/prime.c
2019-08-09 10:00:55 +02:00

163 lines
5.0 KiB
C

/* ====================================================================
* 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 "apps.h"
#include <openssl/bn.h>
#undef PROG
#define PROG prime_main
int MAIN(int, char **);
int MAIN(int argc, char **argv)
{
int hex = 0;
int checks = 20;
int generate = 0;
int bits = 0;
int safe = 0;
BIGNUM *bn = NULL;
BIO *bio_out;
apps_startup();
if (bio_err == NULL)
if ((bio_err = BIO_new(BIO_s_file())) != NULL)
BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
--argc;
++argv;
while (argc >= 1 && **argv == '-') {
if (!strcmp(*argv, "-hex"))
hex = 1;
else if (!strcmp(*argv, "-generate"))
generate = 1;
else if (!strcmp(*argv, "-bits"))
if (--argc < 1)
goto bad;
else
bits = atoi(*++argv);
else if (!strcmp(*argv, "-safe"))
safe = 1;
else if (!strcmp(*argv, "-checks"))
if (--argc < 1)
goto bad;
else
checks = atoi(*++argv);
else {
BIO_printf(bio_err, "Unknown option '%s'\n", *argv);
goto bad;
}
--argc;
++argv;
}
if (argv[0] == NULL && !generate) {
BIO_printf(bio_err, "No prime specified\n");
goto bad;
}
if ((bio_out = BIO_new(BIO_s_file())) != NULL) {
BIO_set_fp(bio_out, stdout, BIO_NOCLOSE);
#ifdef OPENSSL_SYS_VMS
{
BIO *tmpbio = BIO_new(BIO_f_linebuffer());
bio_out = BIO_push(tmpbio, bio_out);
}
#endif
}
if (generate) {
char *s;
if (!bits) {
BIO_printf(bio_err, "Specifiy the number of bits.\n");
return 1;
}
bn = BN_new();
BN_generate_prime_ex(bn, bits, safe, NULL, NULL, NULL);
s = hex ? BN_bn2hex(bn) : BN_bn2dec(bn);
BIO_printf(bio_out, "%s\n", s);
OPENSSL_free(s);
} else {
int r;
if (hex)
r = BN_hex2bn(&bn, argv[0]);
else
r = BN_dec2bn(&bn, argv[0]);
if(!r) {
BIO_printf(bio_err, "Failed to process value (%s)\n", argv[0]);
goto end;
}
BN_print(bio_out, bn);
BIO_printf(bio_out, " is %sprime\n",
BN_is_prime_ex(bn, checks, NULL, NULL) ? "" : "not ");
}
end:
BN_free(bn);
BIO_free_all(bio_out);
return 0;
bad:
BIO_printf(bio_err, "options are\n");
BIO_printf(bio_err, "%-14s hex\n", "-hex");
BIO_printf(bio_err, "%-14s number of checks\n", "-checks <n>");
BIO_printf(bio_err, "%-14s generate prime\n", "-generate");
BIO_printf(bio_err, "%-14s number of bits\n", "-bits <n>");
BIO_printf(bio_err, "%-14s safe prime\n", "-safe");
return 1;
}