apps/prime.c

   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
  58 int MAIN(int, char **);
  59
  60 int 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         if (hex)
 132             BN_hex2bn(&bn, argv[0]);
 133         else
 134             BN_dec2bn(&bn, argv[0]);
 135
 136         BN_print(bio_out, bn);
 137         BIO_printf(bio_out, " is %sprime\n",
 138                    BN_is_prime_ex(bn, checks, NULL, NULL) ? "" : "not ");
 139     }
 140
 141     BN_free(bn);
 142     BIO_free_all(bio_out);
 143
 144     return 0;
 145
 146  bad:
 147     BIO_printf(bio_err, "options are\n");
 148     BIO_printf(bio_err, "%-14s hex\n", "-hex");
 149     BIO_printf(bio_err, "%-14s number of checks\n", "-checks <n>");
 150     return 1;
 151 }