xref: /freebsd/crypto/openssl/apps/genrsa.c (revision 7750ad47a9a7dbc83f87158464170c8640723293)
1 /* apps/genrsa.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>
60 /* Until the key-gen callbacks are modified to use newer prototypes, we allow
61  * deprecated functions for openssl-internal code */
62 #ifdef OPENSSL_NO_DEPRECATED
63 #undef OPENSSL_NO_DEPRECATED
64 #endif
65 
66 #ifndef OPENSSL_NO_RSA
67 #include <stdio.h>
68 #include <string.h>
69 #include <sys/types.h>
70 #include <sys/stat.h>
71 #include "apps.h"
72 #include <openssl/bio.h>
73 #include <openssl/err.h>
74 #include <openssl/bn.h>
75 #include <openssl/rsa.h>
76 #include <openssl/evp.h>
77 #include <openssl/x509.h>
78 #include <openssl/pem.h>
79 #include <openssl/rand.h>
80 
81 #define DEFBITS	512
82 #undef PROG
83 #define PROG genrsa_main
84 
85 static int MS_CALLBACK genrsa_cb(int p, int n, BN_GENCB *cb);
86 
87 int MAIN(int, char **);
88 
89 int MAIN(int argc, char **argv)
90 	{
91 	BN_GENCB cb;
92 	int ret=1;
93 	int i,num=DEFBITS;
94 	long l;
95 	int use_x931 = 0;
96 	const EVP_CIPHER *enc=NULL;
97 	unsigned long f4=RSA_F4;
98 	char *outfile=NULL;
99 	char *passargout = NULL, *passout = NULL;
100 #ifndef OPENSSL_NO_ENGINE
101 	char *engine=NULL;
102 #endif
103 	char *inrand=NULL;
104 	BIO *out=NULL;
105 	BIGNUM *bn = BN_new();
106 	RSA *rsa = NULL;
107 
108 	if(!bn) goto err;
109 
110 	apps_startup();
111 	BN_GENCB_set(&cb, genrsa_cb, bio_err);
112 
113 	if (bio_err == NULL)
114 		if ((bio_err=BIO_new(BIO_s_file())) != NULL)
115 			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
116 
117 	if (!load_config(bio_err, NULL))
118 		goto err;
119 	if ((out=BIO_new(BIO_s_file())) == NULL)
120 		{
121 		BIO_printf(bio_err,"unable to create BIO for output\n");
122 		goto err;
123 		}
124 
125 	argv++;
126 	argc--;
127 	for (;;)
128 		{
129 		if (argc <= 0) break;
130 		if (strcmp(*argv,"-out") == 0)
131 			{
132 			if (--argc < 1) goto bad;
133 			outfile= *(++argv);
134 			}
135 		else if (strcmp(*argv,"-3") == 0)
136 			f4=3;
137 		else if (strcmp(*argv,"-F4") == 0 || strcmp(*argv,"-f4") == 0)
138 			f4=RSA_F4;
139 		else if (strcmp(*argv,"-x931") == 0)
140 			use_x931 = 1;
141 #ifndef OPENSSL_NO_ENGINE
142 		else if (strcmp(*argv,"-engine") == 0)
143 			{
144 			if (--argc < 1) goto bad;
145 			engine= *(++argv);
146 			}
147 #endif
148 		else if (strcmp(*argv,"-rand") == 0)
149 			{
150 			if (--argc < 1) goto bad;
151 			inrand= *(++argv);
152 			}
153 #ifndef OPENSSL_NO_DES
154 		else if (strcmp(*argv,"-des") == 0)
155 			enc=EVP_des_cbc();
156 		else if (strcmp(*argv,"-des3") == 0)
157 			enc=EVP_des_ede3_cbc();
158 #endif
159 #ifndef OPENSSL_NO_IDEA
160 		else if (strcmp(*argv,"-idea") == 0)
161 			enc=EVP_idea_cbc();
162 #endif
163 #ifndef OPENSSL_NO_SEED
164 		else if (strcmp(*argv,"-seed") == 0)
165 			enc=EVP_seed_cbc();
166 #endif
167 #ifndef OPENSSL_NO_AES
168 		else if (strcmp(*argv,"-aes128") == 0)
169 			enc=EVP_aes_128_cbc();
170 		else if (strcmp(*argv,"-aes192") == 0)
171 			enc=EVP_aes_192_cbc();
172 		else if (strcmp(*argv,"-aes256") == 0)
173 			enc=EVP_aes_256_cbc();
174 #endif
175 #ifndef OPENSSL_NO_CAMELLIA
176 		else if (strcmp(*argv,"-camellia128") == 0)
177 			enc=EVP_camellia_128_cbc();
178 		else if (strcmp(*argv,"-camellia192") == 0)
179 			enc=EVP_camellia_192_cbc();
180 		else if (strcmp(*argv,"-camellia256") == 0)
181 			enc=EVP_camellia_256_cbc();
182 #endif
183 		else if (strcmp(*argv,"-passout") == 0)
184 			{
185 			if (--argc < 1) goto bad;
186 			passargout= *(++argv);
187 			}
188 		else
189 			break;
190 		argv++;
191 		argc--;
192 		}
193 	if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0)))
194 		{
195 bad:
196 		BIO_printf(bio_err,"usage: genrsa [args] [numbits]\n");
197 		BIO_printf(bio_err," -des            encrypt the generated key with DES in cbc mode\n");
198 		BIO_printf(bio_err," -des3           encrypt the generated key with DES in ede cbc mode (168 bit key)\n");
199 #ifndef OPENSSL_NO_IDEA
200 		BIO_printf(bio_err," -idea           encrypt the generated key with IDEA in cbc mode\n");
201 #endif
202 #ifndef OPENSSL_NO_SEED
203 		BIO_printf(bio_err," -seed\n");
204 		BIO_printf(bio_err,"                 encrypt PEM output with cbc seed\n");
205 #endif
206 #ifndef OPENSSL_NO_AES
207 		BIO_printf(bio_err," -aes128, -aes192, -aes256\n");
208 		BIO_printf(bio_err,"                 encrypt PEM output with cbc aes\n");
209 #endif
210 #ifndef OPENSSL_NO_CAMELLIA
211 		BIO_printf(bio_err," -camellia128, -camellia192, -camellia256\n");
212 		BIO_printf(bio_err,"                 encrypt PEM output with cbc camellia\n");
213 #endif
214 		BIO_printf(bio_err," -out file       output the key to 'file\n");
215 		BIO_printf(bio_err," -passout arg    output file pass phrase source\n");
216 		BIO_printf(bio_err," -f4             use F4 (0x10001) for the E value\n");
217 		BIO_printf(bio_err," -3              use 3 for the E value\n");
218 #ifndef OPENSSL_NO_ENGINE
219 		BIO_printf(bio_err," -engine e       use engine e, possibly a hardware device.\n");
220 #endif
221 		BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
222 		BIO_printf(bio_err,"                 load the file (or the files in the directory) into\n");
223 		BIO_printf(bio_err,"                 the random number generator\n");
224 		goto err;
225 		}
226 
227 	ERR_load_crypto_strings();
228 
229 	if(!app_passwd(bio_err, NULL, passargout, NULL, &passout)) {
230 		BIO_printf(bio_err, "Error getting password\n");
231 		goto err;
232 	}
233 
234 #ifndef OPENSSL_NO_ENGINE
235         setup_engine(bio_err, engine, 0);
236 #endif
237 
238 	if (outfile == NULL)
239 		{
240 		BIO_set_fp(out,stdout,BIO_NOCLOSE);
241 #ifdef OPENSSL_SYS_VMS
242 		{
243 		BIO *tmpbio = BIO_new(BIO_f_linebuffer());
244 		out = BIO_push(tmpbio, out);
245 		}
246 #endif
247 		}
248 	else
249 		{
250 		if (BIO_write_filename(out,outfile) <= 0)
251 			{
252 			perror(outfile);
253 			goto err;
254 			}
255 		}
256 
257 	if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL
258 		&& !RAND_status())
259 		{
260 		BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
261 		}
262 	if (inrand != NULL)
263 		BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
264 			app_RAND_load_files(inrand));
265 
266 	BIO_printf(bio_err,"Generating RSA private key, %d bit long modulus\n",
267 		num);
268 
269 	rsa = RSA_new();
270 	if (!rsa)
271 		goto err;
272 
273 	if (use_x931)
274 		{
275 		BIGNUM *pubexp;
276 		pubexp = BN_new();
277 		if (!BN_set_word(pubexp, f4))
278 			goto err;
279 		if (!RSA_X931_generate_key_ex(rsa, num, pubexp, &cb))
280 			goto err;
281 		BN_free(pubexp);
282 		}
283 	else if(!BN_set_word(bn, f4) || !RSA_generate_key_ex(rsa, num, bn, &cb))
284 		goto err;
285 
286 	app_RAND_write_file(NULL, bio_err);
287 
288 	/* We need to do the following for when the base number size is <
289 	 * long, esp windows 3.1 :-(. */
290 	l=0L;
291 	for (i=0; i<rsa->e->top; i++)
292 		{
293 #ifndef SIXTY_FOUR_BIT
294 		l<<=BN_BITS4;
295 		l<<=BN_BITS4;
296 #endif
297 		l+=rsa->e->d[i];
298 		}
299 	BIO_printf(bio_err,"e is %ld (0x%lX)\n",l,l);
300 	{
301 	PW_CB_DATA cb_data;
302 	cb_data.password = passout;
303 	cb_data.prompt_info = outfile;
304 	if (!PEM_write_bio_RSAPrivateKey(out,rsa,enc,NULL,0,
305 		(pem_password_cb *)password_callback,&cb_data))
306 		goto err;
307 	}
308 
309 	ret=0;
310 err:
311 	if (bn) BN_free(bn);
312 	if (rsa) RSA_free(rsa);
313 	if (out) BIO_free_all(out);
314 	if(passout) OPENSSL_free(passout);
315 	if (ret != 0)
316 		ERR_print_errors(bio_err);
317 	apps_shutdown();
318 	OPENSSL_EXIT(ret);
319 	}
320 
321 static int MS_CALLBACK genrsa_cb(int p, int n, BN_GENCB *cb)
322 	{
323 	char c='*';
324 
325 	if (p == 0) c='.';
326 	if (p == 1) c='+';
327 	if (p == 2) c='*';
328 	if (p == 3) c='\n';
329 	BIO_write(cb->arg,&c,1);
330 	(void)BIO_flush(cb->arg);
331 #ifdef LINT
332 	p=n;
333 #endif
334 	return 1;
335 	}
336 #else /* !OPENSSL_NO_RSA */
337 
338 # if PEDANTIC
339 static void *dummy=&dummy;
340 # endif
341 
342 #endif
343