gendh.c revision 68651 
1/* apps/gendh.c */
2/* obsoleted by dhparam.c */
3/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * All rights reserved.
5 *
6 * This package is an SSL implementation written
7 * by Eric Young (eay@cryptsoft.com).
8 * The implementation was written so as to conform with Netscapes SSL.
9 *
10 * This library is free for commercial and non-commercial use as long as
11 * the following conditions are aheared to.  The following conditions
12 * apply to all code found in this distribution, be it the RC4, RSA,
13 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
14 * included with this distribution is covered by the same copyright terms
15 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 *
17 * Copyright remains Eric Young's, and as such any Copyright notices in
18 * the code are not to be removed.
19 * If this package is used in a product, Eric Young should be given attribution
20 * as the author of the parts of the library used.
21 * This can be in the form of a textual message at program startup or
22 * in documentation (online or textual) provided with the package.
23 *
24 * Redistribution and use in source and binary forms, with or without
25 * modification, are permitted provided that the following conditions
26 * are met:
27 * 1. Redistributions of source code must retain the copyright
28 *    notice, this list of conditions and the following disclaimer.
29 * 2. Redistributions in binary form must reproduce the above copyright
30 *    notice, this list of conditions and the following disclaimer in the
31 *    documentation and/or other materials provided with the distribution.
32 * 3. All advertising materials mentioning features or use of this software
33 *    must display the following acknowledgement:
34 *    "This product includes cryptographic software written by
35 *     Eric Young (eay@cryptsoft.com)"
36 *    The word 'cryptographic' can be left out if the rouines from the library
37 *    being used are not cryptographic related :-).
38 * 4. If you include any Windows specific code (or a derivative thereof) from
39 *    the apps directory (application code) you must include an acknowledgement:
40 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 *
42 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
43 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
44 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
45 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
46 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
47 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
48 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
49 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
50 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
51 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * SUCH DAMAGE.
53 *
54 * The licence and distribution terms for any publically available version or
55 * derivative of this code cannot be changed.  i.e. this code cannot simply be
56 * copied and put under another distribution licence
57 * [including the GNU Public Licence.]
58 */
59
60#ifndef NO_DH
61#include <stdio.h>
62#include <string.h>
63#include <sys/types.h>
64#include <sys/stat.h>
65#include "apps.h"
66#include <openssl/bio.h>
67#include <openssl/rand.h>
68#include <openssl/err.h>
69#include <openssl/bn.h>
70#include <openssl/dh.h>
71#include <openssl/x509.h>
72#include <openssl/pem.h>
73
74#define DEFBITS	512
75#undef PROG
76#define PROG gendh_main
77
78static void MS_CALLBACK dh_cb(int p, int n, void *arg);
79
80int MAIN(int, char **);
81
82int MAIN(int argc, char **argv)
83	{
84	DH *dh=NULL;
85	int ret=1,num=DEFBITS;
86	int g=2;
87	char *outfile=NULL;
88	char *inrand=NULL;
89	BIO *out=NULL;
90
91	apps_startup();
92
93	if (bio_err == NULL)
94		if ((bio_err=BIO_new(BIO_s_file())) != NULL)
95			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
96
97	argv++;
98	argc--;
99	for (;;)
100		{
101		if (argc <= 0) break;
102		if (strcmp(*argv,"-out") == 0)
103			{
104			if (--argc < 1) goto bad;
105			outfile= *(++argv);
106			}
107		else if (strcmp(*argv,"-2") == 0)
108			g=2;
109	/*	else if (strcmp(*argv,"-3") == 0)
110			g=3; */
111		else if (strcmp(*argv,"-5") == 0)
112			g=5;
113		else if (strcmp(*argv,"-rand") == 0)
114			{
115			if (--argc < 1) goto bad;
116			inrand= *(++argv);
117			}
118		else
119			break;
120		argv++;
121		argc--;
122		}
123	if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0)))
124		{
125bad:
126		BIO_printf(bio_err,"usage: gendh [args] [numbits]\n");
127		BIO_printf(bio_err," -out file - output the key to 'file\n");
128		BIO_printf(bio_err," -2    use 2 as the generator value\n");
129	/*	BIO_printf(bio_err," -3    use 3 as the generator value\n"); */
130		BIO_printf(bio_err," -5    use 5 as the generator value\n");
131		BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
132		BIO_printf(bio_err,"           - load the file (or the files in the directory) into\n");
133		BIO_printf(bio_err,"             the random number generator\n");
134		goto end;
135		}
136
137	out=BIO_new(BIO_s_file());
138	if (out == NULL)
139		{
140		ERR_print_errors(bio_err);
141		goto end;
142		}
143
144	if (outfile == NULL)
145		{
146		BIO_set_fp(out,stdout,BIO_NOCLOSE);
147#ifdef VMS
148		{
149		BIO *tmpbio = BIO_new(BIO_f_linebuffer());
150		out = BIO_push(tmpbio, out);
151		}
152#endif
153		}
154	else
155		{
156		if (BIO_write_filename(out,outfile) <= 0)
157			{
158			perror(outfile);
159			goto end;
160			}
161		}
162
163	if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL)
164		{
165		BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
166		}
167	if (inrand != NULL)
168		BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
169			app_RAND_load_files(inrand));
170
171	BIO_printf(bio_err,"Generating DH parameters, %d bit long safe prime, generator %d\n",num,g);
172	BIO_printf(bio_err,"This is going to take a long time\n");
173	dh=DH_generate_parameters(num,g,dh_cb,bio_err);
174
175	if (dh == NULL) goto end;
176
177	app_RAND_write_file(NULL, bio_err);
178
179	if (!PEM_write_bio_DHparams(out,dh))
180		goto end;
181	ret=0;
182end:
183	if (ret != 0)
184		ERR_print_errors(bio_err);
185	if (out != NULL) BIO_free_all(out);
186	if (dh != NULL) DH_free(dh);
187	EXIT(ret);
188	}
189
190static void MS_CALLBACK dh_cb(int p, int n, void *arg)
191	{
192	char c='*';
193
194	if (p == 0) c='.';
195	if (p == 1) c='+';
196	if (p == 2) c='*';
197	if (p == 3) c='\n';
198	BIO_write((BIO *)arg,&c,1);
199	(void)BIO_flush((BIO *)arg);
200#ifdef LINT
201	p=n;
202#endif
203	}
204#endif
205