xref: /freebsd/crypto/openssl/apps/gendsa.c (revision ab00ac327a66a53edaac95b536b209db3ae2cd9f)
1 /* apps/gendsa.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young (eay@cryptsoft.com).
7  * The implementation was written so as to conform with Netscapes SSL.
8  *
9  * This library is free for commercial and non-commercial use as long as
10  * the following conditions are aheared to.  The following conditions
11  * apply to all code found in this distribution, be it the RC4, RSA,
12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13  * included with this distribution is covered by the same copyright terms
14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15  *
16  * Copyright remains Eric Young's, and as such any Copyright notices in
17  * the code are not to be removed.
18  * If this package is used in a product, Eric Young should be given attribution
19  * as the author of the parts of the library used.
20  * This can be in the form of a textual message at program startup or
21  * in documentation (online or textual) provided with the package.
22  *
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
26  * 1. Redistributions of source code must retain the copyright
27  *    notice, this list of conditions and the following disclaimer.
28  * 2. Redistributions in binary form must reproduce the above copyright
29  *    notice, this list of conditions and the following disclaimer in the
30  *    documentation and/or other materials provided with the distribution.
31  * 3. All advertising materials mentioning features or use of this software
32  *    must display the following acknowledgement:
33  *    "This product includes cryptographic software written by
34  *     Eric Young (eay@cryptsoft.com)"
35  *    The word 'cryptographic' can be left out if the rouines from the library
36  *    being used are not cryptographic related :-).
37  * 4. If you include any Windows specific code (or a derivative thereof) from
38  *    the apps directory (application code) you must include an acknowledgement:
39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40  *
41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51  * SUCH DAMAGE.
52  *
53  * The licence and distribution terms for any publically available version or
54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
55  * copied and put under another distribution licence
56  * [including the GNU Public Licence.]
57  */
58 
59 #include <openssl/opensslconf.h> /* for OPENSSL_NO_DSA */
60 #ifndef OPENSSL_NO_DSA
61 # include <stdio.h>
62 # include <string.h>
63 # include <sys/types.h>
64 # include <sys/stat.h>
65 # include "apps.h"
66 # include <openssl/bio.h>
67 # include <openssl/err.h>
68 # include <openssl/bn.h>
69 # include <openssl/dsa.h>
70 # include <openssl/x509.h>
71 # include <openssl/pem.h>
72 
73 # define DEFBITS 512
74 # undef PROG
75 # define PROG gendsa_main
76 
77 int MAIN(int, char **);
78 
79 int MAIN(int argc, char **argv)
80 {
81     DSA *dsa = NULL;
82     int ret = 1;
83     char *outfile = NULL;
84     char *inrand = NULL, *dsaparams = NULL;
85     char *passargout = NULL, *passout = NULL;
86     BIO *out = NULL, *in = NULL;
87     const EVP_CIPHER *enc = NULL;
88     char *engine = NULL;
89     ENGINE *e = NULL;
90 
91     apps_startup();
92 
93     if (bio_err == NULL)
94         if ((bio_err = BIO_new(BIO_s_file())) != NULL)
95             BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
96 
97     if (!load_config(bio_err, NULL))
98         goto end;
99 
100     argv++;
101     argc--;
102     for (;;) {
103         if (argc <= 0)
104             break;
105         if (strcmp(*argv, "-out") == 0) {
106             if (--argc < 1)
107                 goto bad;
108             outfile = *(++argv);
109         } else if (strcmp(*argv, "-passout") == 0) {
110             if (--argc < 1)
111                 goto bad;
112             passargout = *(++argv);
113         }
114 # ifndef OPENSSL_NO_ENGINE
115         else if (strcmp(*argv, "-engine") == 0) {
116             if (--argc < 1)
117                 goto bad;
118             engine = *(++argv);
119         }
120 # endif
121         else if (strcmp(*argv, "-rand") == 0) {
122             if (--argc < 1)
123                 goto bad;
124             inrand = *(++argv);
125         } else if (strcmp(*argv, "-") == 0)
126             goto bad;
127 # ifndef OPENSSL_NO_DES
128         else if (strcmp(*argv, "-des") == 0)
129             enc = EVP_des_cbc();
130         else if (strcmp(*argv, "-des3") == 0)
131             enc = EVP_des_ede3_cbc();
132 # endif
133 # ifndef OPENSSL_NO_IDEA
134         else if (strcmp(*argv, "-idea") == 0)
135             enc = EVP_idea_cbc();
136 # endif
137 # ifndef OPENSSL_NO_SEED
138         else if (strcmp(*argv, "-seed") == 0)
139             enc = EVP_seed_cbc();
140 # endif
141 # ifndef OPENSSL_NO_AES
142         else if (strcmp(*argv, "-aes128") == 0)
143             enc = EVP_aes_128_cbc();
144         else if (strcmp(*argv, "-aes192") == 0)
145             enc = EVP_aes_192_cbc();
146         else if (strcmp(*argv, "-aes256") == 0)
147             enc = EVP_aes_256_cbc();
148 # endif
149 # ifndef OPENSSL_NO_CAMELLIA
150         else if (strcmp(*argv, "-camellia128") == 0)
151             enc = EVP_camellia_128_cbc();
152         else if (strcmp(*argv, "-camellia192") == 0)
153             enc = EVP_camellia_192_cbc();
154         else if (strcmp(*argv, "-camellia256") == 0)
155             enc = EVP_camellia_256_cbc();
156 # endif
157         else if (**argv != '-' && dsaparams == NULL) {
158             dsaparams = *argv;
159         } else
160             goto bad;
161         argv++;
162         argc--;
163     }
164 
165     if (dsaparams == NULL) {
166  bad:
167         BIO_printf(bio_err, "usage: gendsa [args] dsaparam-file\n");
168         BIO_printf(bio_err, " -out file - output the key to 'file'\n");
169 # ifndef OPENSSL_NO_DES
170         BIO_printf(bio_err,
171                    " -des      - encrypt the generated key with DES in cbc mode\n");
172         BIO_printf(bio_err,
173                    " -des3     - encrypt the generated key with DES in ede cbc mode (168 bit key)\n");
174 # endif
175 # ifndef OPENSSL_NO_IDEA
176         BIO_printf(bio_err,
177                    " -idea     - encrypt the generated key with IDEA in cbc mode\n");
178 # endif
179 # ifndef OPENSSL_NO_SEED
180         BIO_printf(bio_err, " -seed\n");
181         BIO_printf(bio_err,
182                    "                 encrypt PEM output with cbc seed\n");
183 # endif
184 # ifndef OPENSSL_NO_AES
185         BIO_printf(bio_err, " -aes128, -aes192, -aes256\n");
186         BIO_printf(bio_err,
187                    "                 encrypt PEM output with cbc aes\n");
188 # endif
189 # ifndef OPENSSL_NO_CAMELLIA
190         BIO_printf(bio_err, " -camellia128, -camellia192, -camellia256\n");
191         BIO_printf(bio_err,
192                    "                 encrypt PEM output with cbc camellia\n");
193 # endif
194 # ifndef OPENSSL_NO_ENGINE
195         BIO_printf(bio_err,
196                    " -engine e - use engine e, possibly a hardware device.\n");
197 # endif
198         BIO_printf(bio_err, " -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR,
199                    LIST_SEPARATOR_CHAR);
200         BIO_printf(bio_err,
201                    "           - load the file (or the files in the directory) into\n");
202         BIO_printf(bio_err, "             the random number generator\n");
203         BIO_printf(bio_err, " dsaparam-file\n");
204         BIO_printf(bio_err,
205                    "           - a DSA parameter file as generated by the dsaparam command\n");
206         goto end;
207     }
208     e = setup_engine(bio_err, engine, 0);
209 
210     if (!app_passwd(bio_err, NULL, passargout, NULL, &passout)) {
211         BIO_printf(bio_err, "Error getting password\n");
212         goto end;
213     }
214 
215     in = BIO_new(BIO_s_file());
216     if (!(BIO_read_filename(in, dsaparams))) {
217         perror(dsaparams);
218         goto end;
219     }
220 
221     if ((dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL)) == NULL) {
222         BIO_printf(bio_err, "unable to load DSA parameter file\n");
223         goto end;
224     }
225     BIO_free(in);
226     in = NULL;
227 
228     out = BIO_new(BIO_s_file());
229     if (out == NULL)
230         goto end;
231 
232     if (outfile == NULL) {
233         BIO_set_fp(out, stdout, BIO_NOCLOSE);
234 # ifdef OPENSSL_SYS_VMS
235         {
236             BIO *tmpbio = BIO_new(BIO_f_linebuffer());
237             out = BIO_push(tmpbio, out);
238         }
239 # endif
240     } else {
241         if (BIO_write_filename(out, outfile) <= 0) {
242             perror(outfile);
243             goto end;
244         }
245     }
246 
247     if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL) {
248         BIO_printf(bio_err,
249                    "warning, not much extra random data, consider using the -rand option\n");
250     }
251     if (inrand != NULL)
252         BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
253                    app_RAND_load_files(inrand));
254 
255     BIO_printf(bio_err, "Generating DSA key, %d bits\n", BN_num_bits(dsa->p));
256     if (!DSA_generate_key(dsa))
257         goto end;
258 
259     app_RAND_write_file(NULL, bio_err);
260 
261     if (!PEM_write_bio_DSAPrivateKey(out, dsa, enc, NULL, 0, NULL, passout))
262         goto end;
263     ret = 0;
264  end:
265     if (ret != 0)
266         ERR_print_errors(bio_err);
267     if (in != NULL)
268         BIO_free(in);
269     if (out != NULL)
270         BIO_free_all(out);
271     if (dsa != NULL)
272         DSA_free(dsa);
273     release_engine(e);
274     if (passout)
275         OPENSSL_free(passout);
276     apps_shutdown();
277     OPENSSL_EXIT(ret);
278 }
279 #else                           /* !OPENSSL_NO_DSA */
280 
281 # if PEDANTIC
282 static void *dummy = &dummy;
283 # endif
284 
285 #endif
286