prime.c revision 296465 
1/* ====================================================================
2 * Copyright (c) 2004 The OpenSSL Project.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in
13 *    the documentation and/or other materials provided with the
14 *    distribution.
15 *
16 * 3. All advertising materials mentioning features or use of this
17 *    software must display the following acknowledgment:
18 *    "This product includes software developed by the OpenSSL Project
19 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
20 *
21 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
22 *    endorse or promote products derived from this software without
23 *    prior written permission. For written permission, please contact
24 *    openssl-core@openssl.org.
25 *
26 * 5. Products derived from this software may not be called "OpenSSL"
27 *    nor may "OpenSSL" appear in their names without prior written
28 *    permission of the OpenSSL Project.
29 *
30 * 6. Redistributions of any form whatsoever must retain the following
31 *    acknowledgment:
32 *    "This product includes software developed by the OpenSSL Project
33 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
34 *
35 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
38 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
42 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
46 * OF THE POSSIBILITY OF SUCH DAMAGE.
47 *
48 */
49
50#include <string.h>
51
52#include "apps.h"
53#include <openssl/bn.h>
54
55#undef PROG
56#define PROG prime_main
57
58int MAIN(int, char **);
59
60int MAIN(int argc, char **argv)
61{
62    int hex = 0;
63    int checks = 20;
64    BIGNUM *bn = NULL;
65    BIO *bio_out;
66
67    apps_startup();
68
69    if (bio_err == NULL)
70        if ((bio_err = BIO_new(BIO_s_file())) != NULL)
71            BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
72
73    --argc;
74    ++argv;
75    while (argc >= 1 && **argv == '-') {
76        if (!strcmp(*argv, "-hex"))
77            hex = 1;
78        else if (!strcmp(*argv, "-checks"))
79            if (--argc < 1)
80                goto bad;
81            else
82                checks = atoi(*++argv);
83        else {
84            BIO_printf(bio_err, "Unknown option '%s'\n", *argv);
85            goto bad;
86        }
87        --argc;
88        ++argv;
89    }
90
91    if (argv[0] == NULL) {
92        BIO_printf(bio_err, "No prime specified\n");
93        goto bad;
94    }
95
96    if ((bio_out = BIO_new(BIO_s_file())) != NULL) {
97        BIO_set_fp(bio_out, stdout, BIO_NOCLOSE);
98#ifdef OPENSSL_SYS_VMS
99        {
100            BIO *tmpbio = BIO_new(BIO_f_linebuffer());
101            bio_out = BIO_push(tmpbio, bio_out);
102        }
103#endif
104    }
105
106    if (hex)
107        BN_hex2bn(&bn, argv[0]);
108    else
109        BN_dec2bn(&bn, argv[0]);
110
111    BN_print(bio_out, bn);
112    BIO_printf(bio_out, " is %sprime\n",
113               BN_is_prime_ex(bn, checks, NULL, NULL) ? "" : "not ");
114
115    BN_free(bn);
116    BIO_free_all(bio_out);
117
118    return 0;
119
120 bad:
121    BIO_printf(bio_err, "options are\n");
122    BIO_printf(bio_err, "%-14s hex\n", "-hex");
123    BIO_printf(bio_err, "%-14s number of checks\n", "-checks <n>");
124    return 1;
125}
126