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 #ifndef OPENSSL_NO_ENGINE
93 ENGINE *e = NULL;
94 #endif
95 DH *dh=NULL;
96 int ret=1,num=DEFBITS;
97 int g=2;
98 char *outfile=NULL;
99 char *inrand=NULL;
100 #ifndef OPENSSL_NO_ENGINE
101 char *engine=NULL;
102 #endif
103 BIO *out=NULL;
104
105 apps_startup();
106
107 BN_GENCB_set(&cb, dh_cb, bio_err);
108 if (bio_err == NULL)
109 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
110 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
111
112 if (!load_config(bio_err, NULL))
113 goto end;
114
115 argv++;
116 argc--;
117 for (;;)
118 {
119 if (argc <= 0) break;
120 if (strcmp(*argv,"-out") == 0)
121 {
122 if (--argc < 1) goto bad;
123 outfile= *(++argv);
124 }
125 else if (strcmp(*argv,"-2") == 0)
126 g=2;
127 /* else if (strcmp(*argv,"-3") == 0)
128 g=3; */
129 else if (strcmp(*argv,"-5") == 0)
130 g=5;
131 #ifndef OPENSSL_NO_ENGINE
132 else if (strcmp(*argv,"-engine") == 0)
133 {
134 if (--argc < 1) goto bad;
135 engine= *(++argv);
136 }
137 #endif
138 else if (strcmp(*argv,"-rand") == 0)
139 {
140 if (--argc < 1) goto bad;
141 inrand= *(++argv);
142 }
143 else
144 break;
145 argv++;
146 argc--;
147 }
148 if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0)))
149 {
150 bad:
151 BIO_printf(bio_err,"usage: gendh [args] [numbits]\n");
152 BIO_printf(bio_err," -out file - output the key to 'file\n");
153 BIO_printf(bio_err," -2 - use 2 as the generator value\n");
154 /* BIO_printf(bio_err," -3 - use 3 as the generator value\n"); */
155 BIO_printf(bio_err," -5 - use 5 as the generator value\n");
156 #ifndef OPENSSL_NO_ENGINE
157 BIO_printf(bio_err," -engine e - use engine e, possibly a hardware device.\n");
158 #endif
159 BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
160 BIO_printf(bio_err," - load the file (or the files in the directory) into\n");
161 BIO_printf(bio_err," the random number generator\n");
162 goto end;
163 }
164
165 #ifndef OPENSSL_NO_ENGINE
166 e = setup_engine(bio_err, engine, 0);
167 #endif
168
169 out=BIO_new(BIO_s_file());
170 if (out == NULL)
171 {
172 ERR_print_errors(bio_err);
173 goto end;
174 }
175
176 if (outfile == NULL)
177 {
178 BIO_set_fp(out,stdout,BIO_NOCLOSE);
179 #ifdef OPENSSL_SYS_VMS
180 {
181 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
182 out = BIO_push(tmpbio, out);
183 }
184 #endif
185 }
186 else
187 {
188 if (BIO_write_filename(out,outfile) <= 0)
189 {
190 perror(outfile);
191 goto end;
192 }
193 }
194
195 if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL)
196 {
197 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
198 }
199 if (inrand != NULL)
200 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
201 app_RAND_load_files(inrand));
202
203 BIO_printf(bio_err,"Generating DH parameters, %d bit long safe prime, generator %d\n",num,g);
204 BIO_printf(bio_err,"This is going to take a long time\n");
205
206 if(((dh = DH_new()) == NULL) || !DH_generate_parameters_ex(dh, num, g, &cb))
207 goto end;
208
209 app_RAND_write_file(NULL, bio_err);
210
211 if (!PEM_write_bio_DHparams(out,dh))
212 goto end;
213 ret=0;
214 end:
215 if (ret != 0)
216 ERR_print_errors(bio_err);
217 if (out != NULL) BIO_free_all(out);
218 if (dh != NULL) 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) c='.';
228 if (p == 1) c='+';
229 if (p == 2) c='*';
230 if (p == 3) c='\n';
231 BIO_write(cb->arg,&c,1);
232 (void)BIO_flush(cb->arg);
233 #ifdef LINT
234 p=n;
235 #endif
236 return 1;
237 }
238 #else /* !OPENSSL_NO_DH */
239
240 # if PEDANTIC
241 static void *dummy=&dummy;
242 # endif
243
244 #endif
245