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