• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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 #include <openssl/opensslconf.h>
61 /* Until the key-gen callbacks are modified to use newer prototypes, we allow
62  * deprecated functions for openssl-internal code */
63 #ifdef OPENSSL_NO_DEPRECATED
64 #undef OPENSSL_NO_DEPRECATED
65 #endif
66 
67 #ifndef OPENSSL_NO_DH
68 #include <stdio.h>
69 #include <string.h>
70 #include <sys/types.h>
71 #include <sys/stat.h>
72 #include "apps.h"
73 #include <openssl/bio.h>
74 #include <openssl/rand.h>
75 #include <openssl/err.h>
76 #include <openssl/bn.h>
77 #include <openssl/dh.h>
78 #include <openssl/x509.h>
79 #include <openssl/pem.h>
80 
81 #define DEFBITS	512
82 #undef PROG
83 #define PROG gendh_main
84 
85 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb);
86 
87 int MAIN(int, char **);
88 
MAIN(int argc,char ** argv)89 int MAIN(int argc, char **argv)
90 	{
91 	BN_GENCB cb;
92 	DH *dh=NULL;
93 	int ret=1,num=DEFBITS;
94 	int g=2;
95 	char *outfile=NULL;
96 	char *inrand=NULL;
97 #ifndef OPENSSL_NO_ENGINE
98 	char *engine=NULL;
99 #endif
100 	BIO *out=NULL;
101 
102 	apps_startup();
103 
104 	BN_GENCB_set(&cb, dh_cb, bio_err);
105 	if (bio_err == NULL)
106 		if ((bio_err=BIO_new(BIO_s_file())) != NULL)
107 			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
108 
109 	if (!load_config(bio_err, NULL))
110 		goto end;
111 
112 	argv++;
113 	argc--;
114 	for (;;)
115 		{
116 		if (argc <= 0) break;
117 		if (strcmp(*argv,"-out") == 0)
118 			{
119 			if (--argc < 1) goto bad;
120 			outfile= *(++argv);
121 			}
122 		else if (strcmp(*argv,"-2") == 0)
123 			g=2;
124 	/*	else if (strcmp(*argv,"-3") == 0)
125 			g=3; */
126 		else if (strcmp(*argv,"-5") == 0)
127 			g=5;
128 #ifndef OPENSSL_NO_ENGINE
129 		else if (strcmp(*argv,"-engine") == 0)
130 			{
131 			if (--argc < 1) goto bad;
132 			engine= *(++argv);
133 			}
134 #endif
135 		else if (strcmp(*argv,"-rand") == 0)
136 			{
137 			if (--argc < 1) goto bad;
138 			inrand= *(++argv);
139 			}
140 		else
141 			break;
142 		argv++;
143 		argc--;
144 		}
145 	if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0)))
146 		{
147 bad:
148 		BIO_printf(bio_err,"usage: gendh [args] [numbits]\n");
149 		BIO_printf(bio_err," -out file - output the key to 'file\n");
150 		BIO_printf(bio_err," -2        - use 2 as the generator value\n");
151 	/*	BIO_printf(bio_err," -3        - use 3 as the generator value\n"); */
152 		BIO_printf(bio_err," -5        - use 5 as the generator value\n");
153 #ifndef OPENSSL_NO_ENGINE
154 		BIO_printf(bio_err," -engine e - use engine e, possibly a hardware device.\n");
155 #endif
156 		BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
157 		BIO_printf(bio_err,"           - load the file (or the files in the directory) into\n");
158 		BIO_printf(bio_err,"             the random number generator\n");
159 		goto end;
160 		}
161 
162 #ifndef OPENSSL_NO_ENGINE
163         setup_engine(bio_err, engine, 0);
164 #endif
165 
166 	out=BIO_new(BIO_s_file());
167 	if (out == NULL)
168 		{
169 		ERR_print_errors(bio_err);
170 		goto end;
171 		}
172 
173 	if (outfile == NULL)
174 		{
175 		BIO_set_fp(out,stdout,BIO_NOCLOSE);
176 #ifdef OPENSSL_SYS_VMS
177 		{
178 		BIO *tmpbio = BIO_new(BIO_f_linebuffer());
179 		out = BIO_push(tmpbio, out);
180 		}
181 #endif
182 		}
183 	else
184 		{
185 		if (BIO_write_filename(out,outfile) <= 0)
186 			{
187 			perror(outfile);
188 			goto end;
189 			}
190 		}
191 
192 	if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL)
193 		{
194 		BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
195 		}
196 	if (inrand != NULL)
197 		BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
198 			app_RAND_load_files(inrand));
199 
200 	BIO_printf(bio_err,"Generating DH parameters, %d bit long safe prime, generator %d\n",num,g);
201 	BIO_printf(bio_err,"This is going to take a long time\n");
202 
203 	if(((dh = DH_new()) == NULL) || !DH_generate_parameters_ex(dh, num, g, &cb))
204 		goto end;
205 
206 	app_RAND_write_file(NULL, bio_err);
207 
208 	if (!PEM_write_bio_DHparams(out,dh))
209 		goto end;
210 	ret=0;
211 end:
212 	if (ret != 0)
213 		ERR_print_errors(bio_err);
214 	if (out != NULL) BIO_free_all(out);
215 	if (dh != NULL) DH_free(dh);
216 	apps_shutdown();
217 	OPENSSL_EXIT(ret);
218 	}
219 
dh_cb(int p,int n,BN_GENCB * cb)220 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb)
221 	{
222 	char c='*';
223 
224 	if (p == 0) c='.';
225 	if (p == 1) c='+';
226 	if (p == 2) c='*';
227 	if (p == 3) c='\n';
228 	BIO_write(cb->arg,&c,1);
229 	(void)BIO_flush(cb->arg);
230 #ifdef LINT
231 	p=n;
232 #endif
233 	return 1;
234 	}
235 #else /* !OPENSSL_NO_DH */
236 
237 # if PEDANTIC
238 static void *dummy=&dummy;
239 # endif
240 
241 #endif
242