1 /* apps/dsaparam.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 /*
61 * Until the key-gen callbacks are modified to use newer prototypes, we allow
62 * deprecated functions for openssl-internal code
63 */
64 #ifdef OPENSSL_NO_DEPRECATED
65 # undef OPENSSL_NO_DEPRECATED
66 #endif
67
68 #ifndef OPENSSL_NO_DSA
69 # include <assert.h>
70 # include <stdio.h>
71 # include <stdlib.h>
72 # include <time.h>
73 # include <string.h>
74 # include "apps.h"
75 # include <openssl/bio.h>
76 # include <openssl/err.h>
77 # include <openssl/bn.h>
78 # include <openssl/dsa.h>
79 # include <openssl/x509.h>
80 # include <openssl/pem.h>
81
82 # undef PROG
83 # define PROG dsaparam_main
84
85 /*-
86 * -inform arg - input format - default PEM (DER or PEM)
87 * -outform arg - output format - default PEM
88 * -in arg - input file - default stdin
89 * -out arg - output file - default stdout
90 * -noout
91 * -text
92 * -C
93 * -noout
94 * -genkey
95 * #ifdef GENCB_TEST
96 * -timebomb n - interrupt keygen after <n> seconds
97 * #endif
98 */
99
100 # ifdef GENCB_TEST
101
102 static int stop_keygen_flag = 0;
103
timebomb_sigalarm(int foo)104 static void timebomb_sigalarm(int foo)
105 {
106 stop_keygen_flag = 1;
107 }
108
109 # endif
110
111 static int MS_CALLBACK dsa_cb(int p, int n, BN_GENCB *cb);
112
113 int MAIN(int, char **);
114
MAIN(int argc,char ** argv)115 int MAIN(int argc, char **argv)
116 {
117 DSA *dsa = NULL;
118 int i, badops = 0, text = 0;
119 BIO *in = NULL, *out = NULL;
120 int informat, outformat, noout = 0, C = 0, ret = 1;
121 char *infile, *outfile, *prog, *inrand = NULL;
122 int numbits = -1, num, genkey = 0;
123 int need_rand = 0;
124 char *engine = NULL;
125 ENGINE *e = NULL;
126 # ifdef GENCB_TEST
127 int timebomb = 0;
128 # endif
129
130 apps_startup();
131
132 if (bio_err == NULL)
133 if ((bio_err = BIO_new(BIO_s_file())) != NULL)
134 BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
135
136 if (!load_config(bio_err, NULL))
137 goto end;
138
139 infile = NULL;
140 outfile = NULL;
141 informat = FORMAT_PEM;
142 outformat = FORMAT_PEM;
143
144 prog = argv[0];
145 argc--;
146 argv++;
147 while (argc >= 1) {
148 if (strcmp(*argv, "-inform") == 0) {
149 if (--argc < 1)
150 goto bad;
151 informat = str2fmt(*(++argv));
152 } else if (strcmp(*argv, "-outform") == 0) {
153 if (--argc < 1)
154 goto bad;
155 outformat = str2fmt(*(++argv));
156 } else if (strcmp(*argv, "-in") == 0) {
157 if (--argc < 1)
158 goto bad;
159 infile = *(++argv);
160 } else if (strcmp(*argv, "-out") == 0) {
161 if (--argc < 1)
162 goto bad;
163 outfile = *(++argv);
164 }
165 # ifndef OPENSSL_NO_ENGINE
166 else if (strcmp(*argv, "-engine") == 0) {
167 if (--argc < 1)
168 goto bad;
169 engine = *(++argv);
170 }
171 # endif
172 # ifdef GENCB_TEST
173 else if (strcmp(*argv, "-timebomb") == 0) {
174 if (--argc < 1)
175 goto bad;
176 timebomb = atoi(*(++argv));
177 }
178 # endif
179 else if (strcmp(*argv, "-text") == 0)
180 text = 1;
181 else if (strcmp(*argv, "-C") == 0)
182 C = 1;
183 else if (strcmp(*argv, "-genkey") == 0) {
184 genkey = 1;
185 need_rand = 1;
186 } else if (strcmp(*argv, "-rand") == 0) {
187 if (--argc < 1)
188 goto bad;
189 inrand = *(++argv);
190 need_rand = 1;
191 } else if (strcmp(*argv, "-noout") == 0)
192 noout = 1;
193 else if (sscanf(*argv, "%d", &num) == 1) {
194 /* generate a key */
195 numbits = num;
196 need_rand = 1;
197 } else {
198 BIO_printf(bio_err, "unknown option %s\n", *argv);
199 badops = 1;
200 break;
201 }
202 argc--;
203 argv++;
204 }
205
206 if (badops) {
207 bad:
208 BIO_printf(bio_err, "%s [options] [bits] <infile >outfile\n", prog);
209 BIO_printf(bio_err, "where options are\n");
210 BIO_printf(bio_err, " -inform arg input format - DER or PEM\n");
211 BIO_printf(bio_err, " -outform arg output format - DER or PEM\n");
212 BIO_printf(bio_err, " -in arg input file\n");
213 BIO_printf(bio_err, " -out arg output file\n");
214 BIO_printf(bio_err, " -text print as text\n");
215 BIO_printf(bio_err, " -C Output C code\n");
216 BIO_printf(bio_err, " -noout no output\n");
217 BIO_printf(bio_err, " -genkey generate a DSA key\n");
218 BIO_printf(bio_err,
219 " -rand files to use for random number input\n");
220 # ifndef OPENSSL_NO_ENGINE
221 BIO_printf(bio_err,
222 " -engine e use engine e, possibly a hardware device.\n");
223 # endif
224 # ifdef GENCB_TEST
225 BIO_printf(bio_err,
226 " -timebomb n interrupt keygen after <n> seconds\n");
227 # endif
228 BIO_printf(bio_err,
229 " number number of bits to use for generating private key\n");
230 goto end;
231 }
232
233 ERR_load_crypto_strings();
234
235 in = BIO_new(BIO_s_file());
236 out = BIO_new(BIO_s_file());
237 if ((in == NULL) || (out == NULL)) {
238 ERR_print_errors(bio_err);
239 goto end;
240 }
241
242 if (infile == NULL)
243 BIO_set_fp(in, stdin, BIO_NOCLOSE);
244 else {
245 if (BIO_read_filename(in, infile) <= 0) {
246 perror(infile);
247 goto end;
248 }
249 }
250 if (outfile == NULL) {
251 BIO_set_fp(out, stdout, BIO_NOCLOSE);
252 # ifdef OPENSSL_SYS_VMS
253 {
254 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
255 out = BIO_push(tmpbio, out);
256 }
257 # endif
258 } else {
259 if (BIO_write_filename(out, outfile) <= 0) {
260 perror(outfile);
261 goto end;
262 }
263 }
264
265 e = setup_engine(bio_err, engine, 0);
266
267 if (need_rand) {
268 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
269 if (inrand != NULL)
270 BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
271 app_RAND_load_files(inrand));
272 }
273
274 if (numbits > 0) {
275 BN_GENCB cb;
276 BN_GENCB_set(&cb, dsa_cb, bio_err);
277 assert(need_rand);
278 dsa = DSA_new();
279 if (!dsa) {
280 BIO_printf(bio_err, "Error allocating DSA object\n");
281 goto end;
282 }
283 BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n",
284 num);
285 BIO_printf(bio_err, "This could take some time\n");
286 # ifdef GENCB_TEST
287 if (timebomb > 0) {
288 struct sigaction act;
289 act.sa_handler = timebomb_sigalarm;
290 act.sa_flags = 0;
291 BIO_printf(bio_err,
292 "(though I'll stop it if not done within %d secs)\n",
293 timebomb);
294 if (sigaction(SIGALRM, &act, NULL) != 0) {
295 BIO_printf(bio_err, "Error, couldn't set SIGALRM handler\n");
296 goto end;
297 }
298 alarm(timebomb);
299 }
300 # endif
301 if (!DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL, &cb)) {
302 # ifdef GENCB_TEST
303 if (stop_keygen_flag) {
304 BIO_printf(bio_err, "DSA key generation time-stopped\n");
305 /* This is an asked-for behaviour! */
306 ret = 0;
307 goto end;
308 }
309 # endif
310 ERR_print_errors(bio_err);
311 BIO_printf(bio_err, "Error, DSA key generation failed\n");
312 goto end;
313 }
314 } else if (informat == FORMAT_ASN1)
315 dsa = d2i_DSAparams_bio(in, NULL);
316 else if (informat == FORMAT_PEM)
317 dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
318 else {
319 BIO_printf(bio_err, "bad input format specified\n");
320 goto end;
321 }
322 if (dsa == NULL) {
323 BIO_printf(bio_err, "unable to load DSA parameters\n");
324 ERR_print_errors(bio_err);
325 goto end;
326 }
327
328 if (text) {
329 DSAparams_print(out, dsa);
330 }
331
332 if (C) {
333 unsigned char *data;
334 int l, len, bits_p;
335
336 len = BN_num_bytes(dsa->p);
337 bits_p = BN_num_bits(dsa->p);
338 data = (unsigned char *)OPENSSL_malloc(len + 20);
339 if (data == NULL) {
340 perror("OPENSSL_malloc");
341 goto end;
342 }
343 l = BN_bn2bin(dsa->p, data);
344 printf("static unsigned char dsa%d_p[]={", bits_p);
345 for (i = 0; i < l; i++) {
346 if ((i % 12) == 0)
347 printf("\n\t");
348 printf("0x%02X,", data[i]);
349 }
350 printf("\n\t};\n");
351
352 l = BN_bn2bin(dsa->q, data);
353 printf("static unsigned char dsa%d_q[]={", bits_p);
354 for (i = 0; i < l; i++) {
355 if ((i % 12) == 0)
356 printf("\n\t");
357 printf("0x%02X,", data[i]);
358 }
359 printf("\n\t};\n");
360
361 l = BN_bn2bin(dsa->g, data);
362 printf("static unsigned char dsa%d_g[]={", bits_p);
363 for (i = 0; i < l; i++) {
364 if ((i % 12) == 0)
365 printf("\n\t");
366 printf("0x%02X,", data[i]);
367 }
368 printf("\n\t};\n\n");
369
370 printf("DSA *get_dsa%d()\n\t{\n", bits_p);
371 printf("\tDSA *dsa;\n\n");
372 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
373 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
374 bits_p, bits_p);
375 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
376 bits_p, bits_p);
377 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
378 bits_p, bits_p);
379 printf
380 ("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
381 printf("\t\t{ DSA_free(dsa); return(NULL); }\n");
382 printf("\treturn(dsa);\n\t}\n");
383 }
384
385 if (outformat == FORMAT_ASN1 && genkey)
386 noout = 1;
387
388 if (!noout) {
389 if (outformat == FORMAT_ASN1)
390 i = i2d_DSAparams_bio(out, dsa);
391 else if (outformat == FORMAT_PEM)
392 i = PEM_write_bio_DSAparams(out, dsa);
393 else {
394 BIO_printf(bio_err, "bad output format specified for outfile\n");
395 goto end;
396 }
397 if (!i) {
398 BIO_printf(bio_err, "unable to write DSA parameters\n");
399 ERR_print_errors(bio_err);
400 goto end;
401 }
402 }
403 if (genkey) {
404 DSA *dsakey;
405
406 assert(need_rand);
407 if ((dsakey = DSAparams_dup(dsa)) == NULL)
408 goto end;
409 if (!DSA_generate_key(dsakey)) {
410 ERR_print_errors(bio_err);
411 DSA_free(dsakey);
412 goto end;
413 }
414 if (outformat == FORMAT_ASN1)
415 i = i2d_DSAPrivateKey_bio(out, dsakey);
416 else if (outformat == FORMAT_PEM)
417 i = PEM_write_bio_DSAPrivateKey(out, dsakey, NULL, NULL, 0, NULL,
418 NULL);
419 else {
420 BIO_printf(bio_err, "bad output format specified for outfile\n");
421 DSA_free(dsakey);
422 goto end;
423 }
424 DSA_free(dsakey);
425 }
426 if (need_rand)
427 app_RAND_write_file(NULL, bio_err);
428 ret = 0;
429 end:
430 if (in != NULL)
431 BIO_free(in);
432 if (out != NULL)
433 BIO_free_all(out);
434 if (dsa != NULL)
435 DSA_free(dsa);
436 release_engine(e);
437 apps_shutdown();
438 OPENSSL_EXIT(ret);
439 }
440
dsa_cb(int p,int n,BN_GENCB * cb)441 static int MS_CALLBACK dsa_cb(int p, int n, BN_GENCB *cb)
442 {
443 char c = '*';
444
445 if (p == 0)
446 c = '.';
447 if (p == 1)
448 c = '+';
449 if (p == 2)
450 c = '*';
451 if (p == 3)
452 c = '\n';
453 BIO_write(cb->arg, &c, 1);
454 (void)BIO_flush(cb->arg);
455 # ifdef LINT
456 p = n;
457 # endif
458 # ifdef GENCB_TEST
459 if (stop_keygen_flag)
460 return 0;
461 # endif
462 return 1;
463 }
464 #else /* !OPENSSL_NO_DSA */
465
466 # if PEDANTIC
467 static void *dummy = &dummy;
468 # endif
469
470 #endif
471