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1/* $OpenBSD: gendsa.c,v 1.17 2023/03/06 14:32:06 tb Exp $ */
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
61
62#include <sys/types.h>
63#include <sys/stat.h>
64
65#include <stdio.h>
66#include <string.h>
67
68#include "apps.h"
69
70#include <openssl/bio.h>
71#include <openssl/bn.h>
72#include <openssl/dsa.h>
73#include <openssl/err.h>
74#include <openssl/pem.h>
75#include <openssl/x509.h>
76
77static struct {
78 const EVP_CIPHER *enc;
79 char *outfile;
80 char *passargout;
81} cfg;
82
83static const EVP_CIPHER *get_cipher_by_name(char *name)
84{
85 if (name == NULL || strcmp(name, "") == 0)
86 return (NULL);
87#ifndef OPENSSL_NO_AES
88 else if (strcmp(name, "aes128") == 0)
89 return EVP_aes_128_cbc();
90 else if (strcmp(name, "aes192") == 0)
91 return EVP_aes_192_cbc();
92 else if (strcmp(name, "aes256") == 0)
93 return EVP_aes_256_cbc();
94#endif
95#ifndef OPENSSL_NO_CAMELLIA
96 else if (strcmp(name, "camellia128") == 0)
97 return EVP_camellia_128_cbc();
98 else if (strcmp(name, "camellia192") == 0)
99 return EVP_camellia_192_cbc();
100 else if (strcmp(name, "camellia256") == 0)
101 return EVP_camellia_256_cbc();
102#endif
103#ifndef OPENSSL_NO_DES
104 else if (strcmp(name, "des") == 0)
105 return EVP_des_cbc();
106 else if (strcmp(name, "des3") == 0)
107 return EVP_des_ede3_cbc();
108#endif
109#ifndef OPENSSL_NO_IDEA
110 else if (strcmp(name, "idea") == 0)
111 return EVP_idea_cbc();
112#endif
113 else
114 return (NULL);
115}
116
117static int
118set_enc(int argc, char **argv, int *argsused)
119{
120 char *name = argv[0];
121
122 if (*name++ != '-')
123 return (1);
124
125 if ((cfg.enc = get_cipher_by_name(name)) == NULL)
126 return (1);
127
128 *argsused = 1;
129 return (0);
130}
131
132static const struct option gendsa_options[] = {
133#ifndef OPENSSL_NO_AES
134 {
135 .name = "aes128",
136 .desc = "Encrypt PEM output with CBC AES",
137 .type = OPTION_ARGV_FUNC,
138 .opt.argvfunc = set_enc,
139 },
140 {
141 .name = "aes192",
142 .desc = "Encrypt PEM output with CBC AES",
143 .type = OPTION_ARGV_FUNC,
144 .opt.argvfunc = set_enc,
145 },
146 {
147 .name = "aes256",
148 .desc = "Encrypt PEM output with CBC AES",
149 .type = OPTION_ARGV_FUNC,
150 .opt.argvfunc = set_enc,
151 },
152#endif
153#ifndef OPENSSL_NO_CAMELLIA
154 {
155 .name = "camellia128",
156 .desc = "Encrypt PEM output with CBC Camellia",
157 .type = OPTION_ARGV_FUNC,
158 .opt.argvfunc = set_enc,
159 },
160 {
161 .name = "camellia192",
162 .desc = "Encrypt PEM output with CBC Camellia",
163 .type = OPTION_ARGV_FUNC,
164 .opt.argvfunc = set_enc,
165 },
166 {
167 .name = "camellia256",
168 .desc = "Encrypt PEM output with CBC Camellia",
169 .type = OPTION_ARGV_FUNC,
170 .opt.argvfunc = set_enc,
171 },
172#endif
173#ifndef OPENSSL_NO_DES
174 {
175 .name = "des",
176 .desc = "Encrypt the generated key with DES in CBC mode",
177 .type = OPTION_ARGV_FUNC,
178 .opt.argvfunc = set_enc,
179 },
180 {
181 .name = "des3",
182 .desc = "Encrypt the generated key with DES in EDE CBC mode (168 bit key)",
183 .type = OPTION_ARGV_FUNC,
184 .opt.argvfunc = set_enc,
185 },
186#endif
187#ifndef OPENSSL_NO_IDEA
188 {
189 .name = "idea",
190 .desc = "Encrypt the generated key with IDEA in CBC mode",
191 .type = OPTION_ARGV_FUNC,
192 .opt.argvfunc = set_enc,
193 },
194#endif
195 {
196 .name = "out",
197 .argname = "file",
198 .desc = "Output the key to 'file'",
199 .type = OPTION_ARG,
200 .opt.arg = &cfg.outfile,
201 },
202 {
203 .name = "passout",
204 .argname = "src",
205 .desc = "Output file passphrase source",
206 .type = OPTION_ARG,
207 .opt.arg = &cfg.passargout,
208 },
209 { NULL },
210};
211
212static void
213gendsa_usage(void)
214{
215 fprintf(stderr, "usage: gendsa [-aes128 | -aes192 | -aes256 |\n");
216 fprintf(stderr, " -camellia128 | -camellia192 | -camellia256 |\n");
217 fprintf(stderr, " -des | -des3 | -idea] [-out file] [-passout src]");
218 fprintf(stderr, " paramfile\n\n");
219 options_usage(gendsa_options);
220 fprintf(stderr, "\n");
221}
222
223int
224gendsa_main(int argc, char **argv)
225{
226 DSA *dsa = NULL;
227 int ret = 1;
228 char *dsaparams = NULL;
229 char *passout = NULL;
230 BIO *out = NULL, *in = NULL;
231
232 if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
233 perror("pledge");
234 exit(1);
235 }
236
237 memset(&cfg, 0, sizeof(cfg));
238
239 if (options_parse(argc, argv, gendsa_options, &dsaparams, NULL) != 0) {
240 gendsa_usage();
241 goto end;
242 }
243
244 if (dsaparams == NULL) {
245 gendsa_usage();
246 goto end;
247 }
248 if (!app_passwd(bio_err, NULL, cfg.passargout, NULL,
249 &passout)) {
250 BIO_printf(bio_err, "Error getting password\n");
251 goto end;
252 }
253 in = BIO_new(BIO_s_file());
254 if (!(BIO_read_filename(in, dsaparams))) {
255 perror(dsaparams);
256 goto end;
257 }
258 if ((dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL)) == NULL) {
259 BIO_printf(bio_err, "unable to load DSA parameter file\n");
260 goto end;
261 }
262 BIO_free(in);
263 in = NULL;
264
265 out = BIO_new(BIO_s_file());
266 if (out == NULL)
267 goto end;
268
269 if (cfg.outfile == NULL) {
270 BIO_set_fp(out, stdout, BIO_NOCLOSE);
271 } else {
272 if (BIO_write_filename(out, cfg.outfile) <= 0) {
273 perror(cfg.outfile);
274 goto end;
275 }
276 }
277
278 BIO_printf(bio_err, "Generating DSA key, %d bits\n",
279 BN_num_bits(DSA_get0_p(dsa)));
280 if (!DSA_generate_key(dsa))
281 goto end;
282
283 if (!PEM_write_bio_DSAPrivateKey(out, dsa, cfg.enc, NULL, 0,
284 NULL, passout))
285 goto end;
286 ret = 0;
287 end:
288 if (ret != 0)
289 ERR_print_errors(bio_err);
290 BIO_free(in);
291 BIO_free_all(out);
292 DSA_free(dsa);
293 free(passout);
294
295 return (ret);
296}
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