gendsa.c revision 312826 
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
77int MAIN(int, char **);
78
79int 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
282static void *dummy = &dummy;
283# endif
284
285#endif
286