prime.c revision 312826 
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    int generate = 0;
65    int bits = 0;
66    int safe = 0;
67    BIGNUM *bn = NULL;
68    BIO *bio_out;
69
70    apps_startup();
71
72    if (bio_err == NULL)
73        if ((bio_err = BIO_new(BIO_s_file())) != NULL)
74            BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
75
76    --argc;
77    ++argv;
78    while (argc >= 1 && **argv == '-') {
79        if (!strcmp(*argv, "-hex"))
80            hex = 1;
81        else if (!strcmp(*argv, "-generate"))
82            generate = 1;
83        else if (!strcmp(*argv, "-bits"))
84            if (--argc < 1)
85                goto bad;
86            else
87                bits = atoi(*++argv);
88        else if (!strcmp(*argv, "-safe"))
89            safe = 1;
90        else if (!strcmp(*argv, "-checks"))
91            if (--argc < 1)
92                goto bad;
93            else
94                checks = atoi(*++argv);
95        else {
96            BIO_printf(bio_err, "Unknown option '%s'\n", *argv);
97            goto bad;
98        }
99        --argc;
100        ++argv;
101    }
102
103    if (argv[0] == NULL && !generate) {
104        BIO_printf(bio_err, "No prime specified\n");
105        goto bad;
106    }
107
108    if ((bio_out = BIO_new(BIO_s_file())) != NULL) {
109        BIO_set_fp(bio_out, stdout, BIO_NOCLOSE);
110#ifdef OPENSSL_SYS_VMS
111        {
112            BIO *tmpbio = BIO_new(BIO_f_linebuffer());
113            bio_out = BIO_push(tmpbio, bio_out);
114        }
115#endif
116    }
117
118    if (generate) {
119        char *s;
120
121        if (!bits) {
122            BIO_printf(bio_err, "Specifiy the number of bits.\n");
123            return 1;
124        }
125        bn = BN_new();
126        BN_generate_prime_ex(bn, bits, safe, NULL, NULL, NULL);
127        s = hex ? BN_bn2hex(bn) : BN_bn2dec(bn);
128        BIO_printf(bio_out, "%s\n", s);
129        OPENSSL_free(s);
130    } else {
131        int r;
132
133        if (hex)
134            r = BN_hex2bn(&bn, argv[0]);
135        else
136            r = BN_dec2bn(&bn, argv[0]);
137
138        if(!r) {
139            BIO_printf(bio_err, "Failed to process value (%s)\n", argv[0]);
140            goto end;
141        }
142
143        BN_print(bio_out, bn);
144        BIO_printf(bio_out, " is %sprime\n",
145                   BN_is_prime_ex(bn, checks, NULL, NULL) ? "" : "not ");
146    }
147
148 end:
149    BN_free(bn);
150    BIO_free_all(bio_out);
151
152    return 0;
153
154 bad:
155    BIO_printf(bio_err, "options are\n");
156    BIO_printf(bio_err, "%-14s hex\n", "-hex");
157    BIO_printf(bio_err, "%-14s number of checks\n", "-checks <n>");
158    return 1;
159}
160