xref: /minix/crypto/external/bsd/openssl/dist/apps/gendh.c (revision 0a6a1f1d)
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