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 /*
62 * Until the key-gen callbacks are modified to use newer prototypes, we allow
63 * deprecated functions for openssl-internal code
64 */
65 #ifdef OPENSSL_NO_DEPRECATED
66 # undef OPENSSL_NO_DEPRECATED
67 #endif
68
69 #ifndef OPENSSL_NO_DH
70 # include <stdio.h>
71 # include <string.h>
72 # include <sys/types.h>
73 # include <sys/stat.h>
74 # include "apps.h"
75 # include <openssl/bio.h>
76 # include <openssl/rand.h>
77 # include <openssl/err.h>
78 # include <openssl/bn.h>
79 # include <openssl/dh.h>
80 # include <openssl/x509.h>
81 # include <openssl/pem.h>
82
83 # define DEFBITS 2048
84 # undef PROG
85 # define PROG gendh_main
86
87 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb);
88
89 int MAIN(int, char **);
90
MAIN(int argc,char ** argv)91 int MAIN(int argc, char **argv)
92 {
93 BN_GENCB cb;
94 DH *dh = NULL;
95 int ret = 1, num = DEFBITS;
96 int g = 2;
97 char *outfile = NULL;
98 char *inrand = NULL;
99 # ifndef OPENSSL_NO_ENGINE
100 char *engine = NULL;
101 # endif
102 BIO *out = NULL;
103
104 apps_startup();
105
106 BN_GENCB_set(&cb, dh_cb, bio_err);
107 if (bio_err == NULL)
108 if ((bio_err = BIO_new(BIO_s_file())) != NULL)
109 BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
110
111 if (!load_config(bio_err, NULL))
112 goto end;
113
114 argv++;
115 argc--;
116 for (;;) {
117 if (argc <= 0)
118 break;
119 if (strcmp(*argv, "-out") == 0) {
120 if (--argc < 1)
121 goto bad;
122 outfile = *(++argv);
123 } else if (strcmp(*argv, "-2") == 0)
124 g = 2;
125 /*- else if (strcmp(*argv,"-3") == 0)
126 g=3; */
127 else if (strcmp(*argv, "-5") == 0)
128 g = 5;
129 # ifndef OPENSSL_NO_ENGINE
130 else if (strcmp(*argv, "-engine") == 0) {
131 if (--argc < 1)
132 goto bad;
133 engine = *(++argv);
134 }
135 # endif
136 else if (strcmp(*argv, "-rand") == 0) {
137 if (--argc < 1)
138 goto bad;
139 inrand = *(++argv);
140 } else
141 break;
142 argv++;
143 argc--;
144 }
145 if ((argc >= 1) && ((sscanf(*argv, "%d", &num) == 0) || (num < 0))) {
146 bad:
147 BIO_printf(bio_err, "usage: gendh [args] [numbits]\n");
148 BIO_printf(bio_err, " -out file - output the key to 'file\n");
149 BIO_printf(bio_err, " -2 - use 2 as the generator value\n");
150 /*
151 * BIO_printf(bio_err," -3 - use 3 as the generator value\n");
152 */
153 BIO_printf(bio_err, " -5 - use 5 as the generator value\n");
154 # ifndef OPENSSL_NO_ENGINE
155 BIO_printf(bio_err,
156 " -engine e - use engine e, possibly a hardware device.\n");
157 # endif
158 BIO_printf(bio_err, " -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR,
159 LIST_SEPARATOR_CHAR);
160 BIO_printf(bio_err,
161 " - load the file (or the files in the directory) into\n");
162 BIO_printf(bio_err, " the random number generator\n");
163 goto end;
164 }
165 # ifndef OPENSSL_NO_ENGINE
166 setup_engine(bio_err, engine, 0);
167 # endif
168
169 out = BIO_new(BIO_s_file());
170 if (out == NULL) {
171 ERR_print_errors(bio_err);
172 goto end;
173 }
174
175 if (outfile == NULL) {
176 BIO_set_fp(out, stdout, BIO_NOCLOSE);
177 # ifdef OPENSSL_SYS_VMS
178 {
179 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
180 out = BIO_push(tmpbio, out);
181 }
182 # endif
183 } else {
184 if (BIO_write_filename(out, outfile) <= 0) {
185 perror(outfile);
186 goto end;
187 }
188 }
189
190 if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL) {
191 BIO_printf(bio_err,
192 "warning, not much extra random data, consider using the -rand option\n");
193 }
194 if (inrand != NULL)
195 BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
196 app_RAND_load_files(inrand));
197
198 BIO_printf(bio_err,
199 "Generating DH parameters, %d bit long safe prime, generator %d\n",
200 num, g);
201 BIO_printf(bio_err, "This is going to take a long time\n");
202
203 if (((dh = DH_new()) == NULL)
204 || !DH_generate_parameters_ex(dh, num, g, &cb))
205 goto end;
206
207 app_RAND_write_file(NULL, bio_err);
208
209 if (!PEM_write_bio_DHparams(out, dh))
210 goto end;
211 ret = 0;
212 end:
213 if (ret != 0)
214 ERR_print_errors(bio_err);
215 if (out != NULL)
216 BIO_free_all(out);
217 if (dh != NULL)
218 DH_free(dh);
219 apps_shutdown();
220 OPENSSL_EXIT(ret);
221 }
222
dh_cb(int p,int n,BN_GENCB * cb)223 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb)
224 {
225 char c = '*';
226
227 if (p == 0)
228 c = '.';
229 if (p == 1)
230 c = '+';
231 if (p == 2)
232 c = '*';
233 if (p == 3)
234 c = '\n';
235 BIO_write(cb->arg, &c, 1);
236 (void)BIO_flush(cb->arg);
237 # ifdef LINT
238 p = n;
239 # endif
240 return 1;
241 }
242 #else /* !OPENSSL_NO_DH */
243
244 # if PEDANTIC
245 static void *dummy = &dummy;
246 # endif
247
248 #endif
249