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#ifndef OPENSSL_NO_DSA
60#include <stdio.h>
61#include <string.h>
62#include <sys/types.h>
63#include <sys/stat.h>
64#include "apps.h"
65#include <openssl/bio.h>
66#include <openssl/err.h>
67#include <openssl/bn.h>
68#include <openssl/dsa.h>
69#include <openssl/x509.h>
70#include <openssl/pem.h>
71
72#define DEFBITS	512
73#undef PROG
74#define PROG gendsa_main
75
76int MAIN(int, char **);
77
78int MAIN(int argc, char **argv)
79	{
80#ifndef OPENSSL_NO_ENGINE
81	ENGINE *e = NULL;
82#endif
83	DSA *dsa=NULL;
84	int ret=1;
85	char *outfile=NULL;
86	char *inrand=NULL,*dsaparams=NULL;
87	char *passargout = NULL, *passout = NULL;
88	BIO *out=NULL,*in=NULL;
89	const EVP_CIPHER *enc=NULL;
90#ifndef OPENSSL_NO_ENGINE
91	char *engine=NULL;
92#endif
93
94	apps_startup();
95
96	if (bio_err == NULL)
97		if ((bio_err=BIO_new(BIO_s_file())) != NULL)
98			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
99
100	if (!load_config(bio_err, NULL))
101		goto end;
102
103	argv++;
104	argc--;
105	for (;;)
106		{
107		if (argc <= 0) break;
108		if (strcmp(*argv,"-out") == 0)
109			{
110			if (--argc < 1) goto bad;
111			outfile= *(++argv);
112			}
113		else if (strcmp(*argv,"-passout") == 0)
114			{
115			if (--argc < 1) goto bad;
116			passargout= *(++argv);
117			}
118#ifndef OPENSSL_NO_ENGINE
119		else if (strcmp(*argv,"-engine") == 0)
120			{
121			if (--argc < 1) goto bad;
122			engine= *(++argv);
123			}
124#endif
125		else if (strcmp(*argv,"-rand") == 0)
126			{
127			if (--argc < 1) goto bad;
128			inrand= *(++argv);
129			}
130		else if (strcmp(*argv,"-") == 0)
131			goto bad;
132#ifndef OPENSSL_NO_DES
133		else if (strcmp(*argv,"-des") == 0)
134			enc=EVP_des_cbc();
135		else if (strcmp(*argv,"-des3") == 0)
136			enc=EVP_des_ede3_cbc();
137#endif
138#ifndef OPENSSL_NO_IDEA
139		else if (strcmp(*argv,"-idea") == 0)
140			enc=EVP_idea_cbc();
141#endif
142#ifndef OPENSSL_NO_AES
143		else if (strcmp(*argv,"-aes128") == 0)
144			enc=EVP_aes_128_cbc();
145		else if (strcmp(*argv,"-aes192") == 0)
146			enc=EVP_aes_192_cbc();
147		else if (strcmp(*argv,"-aes256") == 0)
148			enc=EVP_aes_256_cbc();
149#endif
150		else if (**argv != '-' && dsaparams == NULL)
151			{
152			dsaparams = *argv;
153			}
154		else
155			goto bad;
156		argv++;
157		argc--;
158		}
159
160	if (dsaparams == NULL)
161		{
162bad:
163		BIO_printf(bio_err,"usage: gendsa [args] dsaparam-file\n");
164		BIO_printf(bio_err," -out file - output the key to 'file'\n");
165#ifndef OPENSSL_NO_DES
166		BIO_printf(bio_err," -des      - encrypt the generated key with DES in cbc mode\n");
167		BIO_printf(bio_err," -des3     - encrypt the generated key with DES in ede cbc mode (168 bit key)\n");
168#endif
169#ifndef OPENSSL_NO_IDEA
170		BIO_printf(bio_err," -idea     - encrypt the generated key with IDEA in cbc mode\n");
171#endif
172#ifndef OPENSSL_NO_AES
173		BIO_printf(bio_err," -aes128, -aes192, -aes256\n");
174		BIO_printf(bio_err,"                 encrypt PEM output with cbc aes\n");
175#endif
176#ifndef OPENSSL_NO_ENGINE
177		BIO_printf(bio_err," -engine e - use engine e, possibly a hardware device.\n");
178#endif
179		BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
180		BIO_printf(bio_err,"           - load the file (or the files in the directory) into\n");
181		BIO_printf(bio_err,"             the random number generator\n");
182		BIO_printf(bio_err," dsaparam-file\n");
183		BIO_printf(bio_err,"           - a DSA parameter file as generated by the dsaparam command\n");
184		goto end;
185		}
186
187#ifndef OPENSSL_NO_ENGINE
188        e = setup_engine(bio_err, engine, 0);
189#endif
190
191	if(!app_passwd(bio_err, NULL, passargout, NULL, &passout)) {
192		BIO_printf(bio_err, "Error getting password\n");
193		goto end;
194	}
195
196
197	in=BIO_new(BIO_s_file());
198	if (!(BIO_read_filename(in,dsaparams)))
199		{
200		perror(dsaparams);
201		goto end;
202		}
203
204	if ((dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL)) == NULL)
205		{
206		BIO_printf(bio_err,"unable to load DSA parameter file\n");
207		goto end;
208		}
209	BIO_free(in);
210	in = NULL;
211
212	out=BIO_new(BIO_s_file());
213	if (out == NULL) goto end;
214
215	if (outfile == NULL)
216		{
217		BIO_set_fp(out,stdout,BIO_NOCLOSE);
218#ifdef OPENSSL_SYS_VMS
219		{
220		BIO *tmpbio = BIO_new(BIO_f_linebuffer());
221		out = BIO_push(tmpbio, out);
222		}
223#endif
224		}
225	else
226		{
227		if (BIO_write_filename(out,outfile) <= 0)
228			{
229			perror(outfile);
230			goto end;
231			}
232		}
233
234	if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL)
235		{
236		BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
237		}
238	if (inrand != NULL)
239		BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
240			app_RAND_load_files(inrand));
241
242	BIO_printf(bio_err,"Generating DSA key, %d bits\n",
243							BN_num_bits(dsa->p));
244	if (!DSA_generate_key(dsa)) goto end;
245
246	app_RAND_write_file(NULL, bio_err);
247
248	if (!PEM_write_bio_DSAPrivateKey(out,dsa,enc,NULL,0,NULL, passout))
249		goto end;
250	ret=0;
251end:
252	if (ret != 0)
253		ERR_print_errors(bio_err);
254	if (in != NULL) BIO_free(in);
255	if (out != NULL) BIO_free_all(out);
256	if (dsa != NULL) DSA_free(dsa);
257	if(passout) OPENSSL_free(passout);
258	apps_shutdown();
259	OPENSSL_EXIT(ret);
260	}
261#endif
262