xref: /freebsd/crypto/openssl/apps/prime.c (revision ddd5b8e9b4d8957fce018c520657cdfa4ecffad3)
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 
56 #undef PROG
57 #define PROG prime_main
58 
59 int MAIN(int, char **);
60 
61 int MAIN(int argc, char **argv)
62     {
63     int hex=0;
64     int checks=20;
65     int generate=0;
66     int bits=0;
67     int safe=0;
68     BIGNUM *bn=NULL;
69     BIO *bio_out;
70 
71     apps_startup();
72 
73     if (bio_err == NULL)
74 	if ((bio_err=BIO_new(BIO_s_file())) != NULL)
75 	    BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
76 
77     --argc;
78     ++argv;
79     while (argc >= 1 && **argv == '-')
80 	{
81 	if(!strcmp(*argv,"-hex"))
82 	    hex=1;
83 	else if(!strcmp(*argv,"-generate"))
84 	    generate=1;
85 	else if(!strcmp(*argv,"-bits"))
86 	    if(--argc < 1)
87 		goto bad;
88 	    else
89 		bits=atoi(*++argv);
90 	else if(!strcmp(*argv,"-safe"))
91 	    safe=1;
92 	else if(!strcmp(*argv,"-checks"))
93 	    if(--argc < 1)
94 		goto bad;
95 	    else
96 		checks=atoi(*++argv);
97 	else
98 	    {
99 	    BIO_printf(bio_err,"Unknown option '%s'\n",*argv);
100 	    goto bad;
101 	    }
102 	--argc;
103 	++argv;
104 	}
105 
106     if (argv[0] == NULL && !generate)
107 	{
108 	BIO_printf(bio_err,"No prime specified\n");
109 	goto bad;
110 	}
111 
112     if ((bio_out=BIO_new(BIO_s_file())) != NULL)
113 	{
114 	BIO_set_fp(bio_out,stdout,BIO_NOCLOSE);
115 #ifdef OPENSSL_SYS_VMS
116 	    {
117 	    BIO *tmpbio = BIO_new(BIO_f_linebuffer());
118 	    bio_out = BIO_push(tmpbio, bio_out);
119 	    }
120 #endif
121 	}
122 
123     if(generate)
124 	{
125 	char *s;
126 
127 	if(!bits)
128 	    {
129 	    BIO_printf(bio_err,"Specifiy the number of bits.\n");
130 	    return 1;
131 	    }
132 	bn=BN_new();
133 	BN_generate_prime_ex(bn,bits,safe,NULL,NULL,NULL);
134 	s=hex ? BN_bn2hex(bn) : BN_bn2dec(bn);
135 	BIO_printf(bio_out,"%s\n",s);
136 	OPENSSL_free(s);
137 	}
138     else
139 	{
140 	if(hex)
141 	    BN_hex2bn(&bn,argv[0]);
142 	else
143 	    BN_dec2bn(&bn,argv[0]);
144 
145 	BN_print(bio_out,bn);
146 	BIO_printf(bio_out," is %sprime\n",
147 		   BN_is_prime_ex(bn,checks,NULL,NULL) ? "" : "not ");
148 	}
149 
150     BN_free(bn);
151     BIO_free_all(bio_out);
152 
153     return 0;
154 
155     bad:
156     BIO_printf(bio_err,"options are\n");
157     BIO_printf(bio_err,"%-14s hex\n","-hex");
158     BIO_printf(bio_err,"%-14s number of checks\n","-checks <n>");
159     return 1;
160     }
161