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1/* $OpenBSD: dsa.c,v 1.1 2014/08/26 17:47:24 jsing 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 <stdio.h>
63#include <stdlib.h>
64#include <time.h>
65#include <string.h>
66
67#include "apps.h"
68
69#include <openssl/bio.h>
70#include <openssl/bn.h>
71#include <openssl/dsa.h>
72#include <openssl/err.h>
73#include <openssl/evp.h>
74#include <openssl/pem.h>
75#include <openssl/x509.h>
76
77/* -inform arg - input format - default PEM (one of DER, NET or PEM)
78 * -outform arg - output format - default PEM
79 * -in arg - input file - default stdin
80 * -out arg - output file - default stdout
81 * -des - encrypt output if PEM format with DES in cbc mode
82 * -des3 - encrypt output if PEM format
83 * -idea - encrypt output if PEM format
84 * -aes128 - encrypt output if PEM format
85 * -aes192 - encrypt output if PEM format
86 * -aes256 - encrypt output if PEM format
87 * -camellia128 - encrypt output if PEM format
88 * -camellia192 - encrypt output if PEM format
89 * -camellia256 - encrypt output if PEM format
90 * -seed - encrypt output if PEM format
91 * -text - print a text version
92 * -modulus - print the DSA public key
93 */
94
95int dsa_main(int, char **);
96
97int
98dsa_main(int argc, char **argv)
99{
100 ENGINE *e = NULL;
101 int ret = 1;
102 DSA *dsa = NULL;
103 int i, badops = 0;
104 const EVP_CIPHER *enc = NULL;
105 BIO *in = NULL, *out = NULL;
106 int informat, outformat, text = 0, noout = 0;
107 int pubin = 0, pubout = 0;
108 char *infile, *outfile, *prog;
109#ifndef OPENSSL_NO_ENGINE
110 char *engine;
111#endif
112 char *passargin = NULL, *passargout = NULL;
113 char *passin = NULL, *passout = NULL;
114 int modulus = 0;
115
116 int pvk_encr = 2;
117
118#ifndef OPENSSL_NO_ENGINE
119 engine = NULL;
120#endif
121 infile = NULL;
122 outfile = NULL;
123 informat = FORMAT_PEM;
124 outformat = FORMAT_PEM;
125
126 prog = argv[0];
127 argc--;
128 argv++;
129 while (argc >= 1) {
130 if (strcmp(*argv, "-inform") == 0) {
131 if (--argc < 1)
132 goto bad;
133 informat = str2fmt(*(++argv));
134 } else if (strcmp(*argv, "-outform") == 0) {
135 if (--argc < 1)
136 goto bad;
137 outformat = str2fmt(*(++argv));
138 } else if (strcmp(*argv, "-in") == 0) {
139 if (--argc < 1)
140 goto bad;
141 infile = *(++argv);
142 } else if (strcmp(*argv, "-out") == 0) {
143 if (--argc < 1)
144 goto bad;
145 outfile = *(++argv);
146 } else if (strcmp(*argv, "-passin") == 0) {
147 if (--argc < 1)
148 goto bad;
149 passargin = *(++argv);
150 } else if (strcmp(*argv, "-passout") == 0) {
151 if (--argc < 1)
152 goto bad;
153 passargout = *(++argv);
154 }
155#ifndef OPENSSL_NO_ENGINE
156 else if (strcmp(*argv, "-engine") == 0) {
157 if (--argc < 1)
158 goto bad;
159 engine = *(++argv);
160 }
161#endif
162 else if (strcmp(*argv, "-pvk-strong") == 0)
163 pvk_encr = 2;
164 else if (strcmp(*argv, "-pvk-weak") == 0)
165 pvk_encr = 1;
166 else if (strcmp(*argv, "-pvk-none") == 0)
167 pvk_encr = 0;
168 else if (strcmp(*argv, "-noout") == 0)
169 noout = 1;
170 else if (strcmp(*argv, "-text") == 0)
171 text = 1;
172 else if (strcmp(*argv, "-modulus") == 0)
173 modulus = 1;
174 else if (strcmp(*argv, "-pubin") == 0)
175 pubin = 1;
176 else if (strcmp(*argv, "-pubout") == 0)
177 pubout = 1;
178 else if ((enc = EVP_get_cipherbyname(&(argv[0][1]))) == NULL) {
179 BIO_printf(bio_err, "unknown option %s\n", *argv);
180 badops = 1;
181 break;
182 }
183 argc--;
184 argv++;
185 }
186
187 if (badops) {
188bad:
189 BIO_printf(bio_err, "%s [options] <infile >outfile\n", prog);
190 BIO_printf(bio_err, "where options are\n");
191 BIO_printf(bio_err, " -inform arg input format - DER or PEM\n");
192 BIO_printf(bio_err, " -outform arg output format - DER or PEM\n");
193 BIO_printf(bio_err, " -in arg input file\n");
194 BIO_printf(bio_err, " -passin arg input file pass phrase source\n");
195 BIO_printf(bio_err, " -out arg output file\n");
196 BIO_printf(bio_err, " -passout arg output file pass phrase source\n");
197#ifndef OPENSSL_NO_ENGINE
198 BIO_printf(bio_err, " -engine e use engine e, possibly a hardware device.\n");
199#endif
200 BIO_printf(bio_err, " -des encrypt PEM output with cbc des\n");
201 BIO_printf(bio_err, " -des3 encrypt PEM output with ede cbc des using 168 bit key\n");
202#ifndef OPENSSL_NO_IDEA
203 BIO_printf(bio_err, " -idea encrypt PEM output with cbc idea\n");
204#endif
205#ifndef OPENSSL_NO_AES
206 BIO_printf(bio_err, " -aes128, -aes192, -aes256\n");
207 BIO_printf(bio_err, " encrypt PEM output with cbc aes\n");
208#endif
209#ifndef OPENSSL_NO_CAMELLIA
210 BIO_printf(bio_err, " -camellia128, -camellia192, -camellia256\n");
211 BIO_printf(bio_err, " encrypt PEM output with cbc camellia\n");
212#endif
213 BIO_printf(bio_err, " -text print the key in text\n");
214 BIO_printf(bio_err, " -noout don't print key out\n");
215 BIO_printf(bio_err, " -modulus print the DSA public value\n");
216 goto end;
217 }
218 ERR_load_crypto_strings();
219
220#ifndef OPENSSL_NO_ENGINE
221 e = setup_engine(bio_err, engine, 0);
222#endif
223
224 if (!app_passwd(bio_err, passargin, passargout, &passin, &passout)) {
225 BIO_printf(bio_err, "Error getting passwords\n");
226 goto end;
227 }
228 in = BIO_new(BIO_s_file());
229 out = BIO_new(BIO_s_file());
230 if ((in == NULL) || (out == NULL)) {
231 ERR_print_errors(bio_err);
232 goto end;
233 }
234 if (infile == NULL)
235 BIO_set_fp(in, stdin, BIO_NOCLOSE);
236 else {
237 if (BIO_read_filename(in, infile) <= 0) {
238 perror(infile);
239 goto end;
240 }
241 }
242
243 BIO_printf(bio_err, "read DSA key\n");
244
245 {
246 EVP_PKEY *pkey;
247
248 if (pubin)
249 pkey = load_pubkey(bio_err, infile, informat, 1,
250 passin, e, "Public Key");
251 else
252 pkey = load_key(bio_err, infile, informat, 1,
253 passin, e, "Private Key");
254
255 if (pkey) {
256 dsa = EVP_PKEY_get1_DSA(pkey);
257 EVP_PKEY_free(pkey);
258 }
259 }
260 if (dsa == NULL) {
261 BIO_printf(bio_err, "unable to load Key\n");
262 ERR_print_errors(bio_err);
263 goto end;
264 }
265 if (outfile == NULL) {
266 BIO_set_fp(out, stdout, BIO_NOCLOSE);
267 } else {
268 if (BIO_write_filename(out, outfile) <= 0) {
269 perror(outfile);
270 goto end;
271 }
272 }
273
274 if (text) {
275 if (!DSA_print(out, dsa, 0)) {
276 perror(outfile);
277 ERR_print_errors(bio_err);
278 goto end;
279 }
280 }
281 if (modulus) {
282 fprintf(stdout, "Public Key=");
283 BN_print(out, dsa->pub_key);
284 fprintf(stdout, "\n");
285 }
286 if (noout)
287 goto end;
288 BIO_printf(bio_err, "writing DSA key\n");
289 if (outformat == FORMAT_ASN1) {
290 if (pubin || pubout)
291 i = i2d_DSA_PUBKEY_bio(out, dsa);
292 else
293 i = i2d_DSAPrivateKey_bio(out, dsa);
294 } else if (outformat == FORMAT_PEM) {
295 if (pubin || pubout)
296 i = PEM_write_bio_DSA_PUBKEY(out, dsa);
297 else
298 i = PEM_write_bio_DSAPrivateKey(out, dsa, enc,
299 NULL, 0, NULL, passout);
300#if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_RC4)
301 } else if (outformat == FORMAT_MSBLOB || outformat == FORMAT_PVK) {
302 EVP_PKEY *pk;
303 pk = EVP_PKEY_new();
304 EVP_PKEY_set1_DSA(pk, dsa);
305 if (outformat == FORMAT_PVK)
306 i = i2b_PVK_bio(out, pk, pvk_encr, 0, passout);
307 else if (pubin || pubout)
308 i = i2b_PublicKey_bio(out, pk);
309 else
310 i = i2b_PrivateKey_bio(out, pk);
311 EVP_PKEY_free(pk);
312#endif
313 } else {
314 BIO_printf(bio_err, "bad output format specified for outfile\n");
315 goto end;
316 }
317 if (i <= 0) {
318 BIO_printf(bio_err, "unable to write private key\n");
319 ERR_print_errors(bio_err);
320 } else
321 ret = 0;
322end:
323 BIO_free(in);
324 if (out != NULL)
325 BIO_free_all(out);
326 if (dsa != NULL)
327 DSA_free(dsa);
328 free(passin);
329 free(passout);
330
331 return (ret);
332}