1 /* apps/dhparam.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 * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111
112 #include <openssl/opensslconf.h> /* for OPENSSL_NO_DH */
113 #ifndef OPENSSL_NO_DH
114 # include <stdio.h>
115 # include <stdlib.h>
116 # include <time.h>
117 # include <string.h>
118 # include "apps.h"
119 # include <openssl/bio.h>
120 # include <openssl/err.h>
121 # include <openssl/bn.h>
122 # include <openssl/dh.h>
123 # include <openssl/x509.h>
124 # include <openssl/pem.h>
125
126 # ifndef OPENSSL_NO_DSA
127 # include <openssl/dsa.h>
128 # endif
129
130 # undef PROG
131 # define PROG dhparam_main
132
133 # define DEFBITS 2048
134
135 /*-
136 * -inform arg - input format - default PEM (DER or PEM)
137 * -outform arg - output format - default PEM
138 * -in arg - input file - default stdin
139 * -out arg - output file - default stdout
140 * -dsaparam - read or generate DSA parameters, convert to DH
141 * -check - check the parameters are ok
142 * -noout
143 * -text
144 * -C
145 */
146
147 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb);
148
149 int MAIN(int, char **);
150
MAIN(int argc,char ** argv)151 int MAIN(int argc, char **argv)
152 {
153 DH *dh = NULL;
154 int i, badops = 0, text = 0;
155 # ifndef OPENSSL_NO_DSA
156 int dsaparam = 0;
157 # endif
158 BIO *in = NULL, *out = NULL;
159 int informat, outformat, check = 0, noout = 0, C = 0, ret = 1;
160 char *infile, *outfile, *prog;
161 char *inrand = NULL;
162 char *engine = NULL;
163 ENGINE *e = NULL;
164 int num = 0, g = 0;
165
166 apps_startup();
167
168 if (bio_err == NULL)
169 if ((bio_err = BIO_new(BIO_s_file())) != NULL)
170 BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
171
172 if (!load_config(bio_err, NULL))
173 goto end;
174
175 infile = NULL;
176 outfile = NULL;
177 informat = FORMAT_PEM;
178 outformat = FORMAT_PEM;
179
180 prog = argv[0];
181 argc--;
182 argv++;
183 while (argc >= 1) {
184 if (strcmp(*argv, "-inform") == 0) {
185 if (--argc < 1)
186 goto bad;
187 informat = str2fmt(*(++argv));
188 } else if (strcmp(*argv, "-outform") == 0) {
189 if (--argc < 1)
190 goto bad;
191 outformat = str2fmt(*(++argv));
192 } else if (strcmp(*argv, "-in") == 0) {
193 if (--argc < 1)
194 goto bad;
195 infile = *(++argv);
196 } else if (strcmp(*argv, "-out") == 0) {
197 if (--argc < 1)
198 goto bad;
199 outfile = *(++argv);
200 }
201 # ifndef OPENSSL_NO_ENGINE
202 else if (strcmp(*argv, "-engine") == 0) {
203 if (--argc < 1)
204 goto bad;
205 engine = *(++argv);
206 }
207 # endif
208 else if (strcmp(*argv, "-check") == 0)
209 check = 1;
210 else if (strcmp(*argv, "-text") == 0)
211 text = 1;
212 # ifndef OPENSSL_NO_DSA
213 else if (strcmp(*argv, "-dsaparam") == 0)
214 dsaparam = 1;
215 # endif
216 else if (strcmp(*argv, "-C") == 0)
217 C = 1;
218 else if (strcmp(*argv, "-noout") == 0)
219 noout = 1;
220 else if (strcmp(*argv, "-2") == 0)
221 g = 2;
222 else if (strcmp(*argv, "-5") == 0)
223 g = 5;
224 else if (strcmp(*argv, "-rand") == 0) {
225 if (--argc < 1)
226 goto bad;
227 inrand = *(++argv);
228 } else if (((sscanf(*argv, "%d", &num) == 0) || (num <= 0)))
229 goto bad;
230 argv++;
231 argc--;
232 }
233
234 if (badops) {
235 bad:
236 BIO_printf(bio_err, "%s [options] [numbits]\n", prog);
237 BIO_printf(bio_err, "where options are\n");
238 BIO_printf(bio_err, " -inform arg input format - one of DER PEM\n");
239 BIO_printf(bio_err,
240 " -outform arg output format - one of DER PEM\n");
241 BIO_printf(bio_err, " -in arg input file\n");
242 BIO_printf(bio_err, " -out arg output file\n");
243 # ifndef OPENSSL_NO_DSA
244 BIO_printf(bio_err,
245 " -dsaparam read or generate DSA parameters, convert to DH\n");
246 # endif
247 BIO_printf(bio_err, " -check check the DH parameters\n");
248 BIO_printf(bio_err,
249 " -text print a text form of the DH parameters\n");
250 BIO_printf(bio_err, " -C Output C code\n");
251 BIO_printf(bio_err,
252 " -2 generate parameters using 2 as the generator value\n");
253 BIO_printf(bio_err,
254 " -5 generate parameters using 5 as the generator value\n");
255 BIO_printf(bio_err,
256 " numbits number of bits in to generate (default 2048)\n");
257 # ifndef OPENSSL_NO_ENGINE
258 BIO_printf(bio_err,
259 " -engine e use engine e, possibly a hardware device.\n");
260 # endif
261 BIO_printf(bio_err, " -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR,
262 LIST_SEPARATOR_CHAR);
263 BIO_printf(bio_err,
264 " - load the file (or the files in the directory) into\n");
265 BIO_printf(bio_err, " the random number generator\n");
266 BIO_printf(bio_err, " -noout no output\n");
267 goto end;
268 }
269
270 ERR_load_crypto_strings();
271
272 e = setup_engine(bio_err, engine, 0);
273
274 if (g && !num)
275 num = DEFBITS;
276
277 # ifndef OPENSSL_NO_DSA
278 if (dsaparam) {
279 if (g) {
280 BIO_printf(bio_err,
281 "generator may not be chosen for DSA parameters\n");
282 goto end;
283 }
284 } else
285 # endif
286 {
287 /* DH parameters */
288 if (num && !g)
289 g = 2;
290 }
291
292 if (num) {
293
294 BN_GENCB cb;
295 BN_GENCB_set(&cb, dh_cb, bio_err);
296 if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL) {
297 BIO_printf(bio_err,
298 "warning, not much extra random data, consider using the -rand option\n");
299 }
300 if (inrand != NULL)
301 BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
302 app_RAND_load_files(inrand));
303
304 # ifndef OPENSSL_NO_DSA
305 if (dsaparam) {
306 DSA *dsa = DSA_new();
307
308 BIO_printf(bio_err,
309 "Generating DSA parameters, %d bit long prime\n", num);
310 if (!dsa
311 || !DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL,
312 &cb)) {
313 if (dsa)
314 DSA_free(dsa);
315 ERR_print_errors(bio_err);
316 goto end;
317 }
318
319 dh = DSA_dup_DH(dsa);
320 DSA_free(dsa);
321 if (dh == NULL) {
322 ERR_print_errors(bio_err);
323 goto end;
324 }
325 } else
326 # endif
327 {
328 dh = DH_new();
329 BIO_printf(bio_err,
330 "Generating DH parameters, %d bit long safe prime, generator %d\n",
331 num, g);
332 BIO_printf(bio_err, "This is going to take a long time\n");
333 if (!dh || !DH_generate_parameters_ex(dh, num, g, &cb)) {
334 ERR_print_errors(bio_err);
335 goto end;
336 }
337 }
338
339 app_RAND_write_file(NULL, bio_err);
340 } else {
341
342 in = BIO_new(BIO_s_file());
343 if (in == NULL) {
344 ERR_print_errors(bio_err);
345 goto end;
346 }
347 if (infile == NULL)
348 BIO_set_fp(in, stdin, BIO_NOCLOSE);
349 else {
350 if (BIO_read_filename(in, infile) <= 0) {
351 perror(infile);
352 goto end;
353 }
354 }
355
356 if (informat != FORMAT_ASN1 && informat != FORMAT_PEM) {
357 BIO_printf(bio_err, "bad input format specified\n");
358 goto end;
359 }
360 # ifndef OPENSSL_NO_DSA
361 if (dsaparam) {
362 DSA *dsa;
363
364 if (informat == FORMAT_ASN1)
365 dsa = d2i_DSAparams_bio(in, NULL);
366 else /* informat == FORMAT_PEM */
367 dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
368
369 if (dsa == NULL) {
370 BIO_printf(bio_err, "unable to load DSA parameters\n");
371 ERR_print_errors(bio_err);
372 goto end;
373 }
374
375 dh = DSA_dup_DH(dsa);
376 DSA_free(dsa);
377 if (dh == NULL) {
378 ERR_print_errors(bio_err);
379 goto end;
380 }
381 } else
382 # endif
383 {
384 if (informat == FORMAT_ASN1) {
385 /*
386 * We have no PEM header to determine what type of DH params it
387 * is. We'll just try both.
388 */
389 dh = d2i_DHparams_bio(in, NULL);
390 /* BIO_reset() returns 0 for success for file BIOs only!!! */
391 if (dh == NULL && BIO_reset(in) == 0)
392 dh = d2i_DHxparams_bio(in, NULL);
393 } else {
394 /* informat == FORMAT_PEM */
395 dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
396 }
397
398 if (dh == NULL) {
399 BIO_printf(bio_err, "unable to load DH parameters\n");
400 ERR_print_errors(bio_err);
401 goto end;
402 }
403 }
404
405 /* dh != NULL */
406 }
407
408 out = BIO_new(BIO_s_file());
409 if (out == NULL) {
410 ERR_print_errors(bio_err);
411 goto end;
412 }
413 if (outfile == NULL) {
414 BIO_set_fp(out, stdout, BIO_NOCLOSE);
415 # ifdef OPENSSL_SYS_VMS
416 {
417 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
418 out = BIO_push(tmpbio, out);
419 }
420 # endif
421 } else {
422 if (BIO_write_filename(out, outfile) <= 0) {
423 perror(outfile);
424 goto end;
425 }
426 }
427
428 if (text) {
429 DHparams_print(out, dh);
430 }
431
432 if (check) {
433 if (!DH_check(dh, &i)) {
434 ERR_print_errors(bio_err);
435 goto end;
436 }
437 if (i & DH_CHECK_P_NOT_PRIME)
438 printf("p value is not prime\n");
439 if (i & DH_CHECK_P_NOT_SAFE_PRIME)
440 printf("p value is not a safe prime\n");
441 if (i & DH_UNABLE_TO_CHECK_GENERATOR)
442 printf("unable to check the generator value\n");
443 if (i & DH_NOT_SUITABLE_GENERATOR)
444 printf("the g value is not a generator\n");
445 if (i == 0)
446 printf("DH parameters appear to be ok.\n");
447 }
448 if (C) {
449 unsigned char *data;
450 int len, l, bits;
451
452 len = BN_num_bytes(dh->p);
453 bits = BN_num_bits(dh->p);
454 data = (unsigned char *)OPENSSL_malloc(len);
455 if (data == NULL) {
456 perror("OPENSSL_malloc");
457 goto end;
458 }
459 printf("#ifndef HEADER_DH_H\n"
460 "#include <openssl/dh.h>\n" "#endif\n");
461 printf("DH *get_dh%d()\n\t{\n", bits);
462
463 l = BN_bn2bin(dh->p, data);
464 printf("\tstatic unsigned char dh%d_p[]={", bits);
465 for (i = 0; i < l; i++) {
466 if ((i % 12) == 0)
467 printf("\n\t\t");
468 printf("0x%02X,", data[i]);
469 }
470 printf("\n\t\t};\n");
471
472 l = BN_bn2bin(dh->g, data);
473 printf("\tstatic unsigned char dh%d_g[]={", bits);
474 for (i = 0; i < l; i++) {
475 if ((i % 12) == 0)
476 printf("\n\t\t");
477 printf("0x%02X,", data[i]);
478 }
479 printf("\n\t\t};\n");
480
481 printf("\tDH *dh;\n\n");
482 printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n");
483 printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n",
484 bits, bits);
485 printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n",
486 bits, bits);
487 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n");
488 printf("\t\t{ DH_free(dh); return(NULL); }\n");
489 if (dh->length)
490 printf("\tdh->length = %ld;\n", dh->length);
491 printf("\treturn(dh);\n\t}\n");
492 OPENSSL_free(data);
493 }
494
495 if (!noout) {
496 if (outformat == FORMAT_ASN1) {
497 if (dh->q != NULL)
498 i = i2d_DHxparams_bio(out, dh);
499 else
500 i = i2d_DHparams_bio(out, dh);
501 } else if (outformat == FORMAT_PEM) {
502 if (dh->q != NULL)
503 i = PEM_write_bio_DHxparams(out, dh);
504 else
505 i = PEM_write_bio_DHparams(out, dh);
506 } else {
507 BIO_printf(bio_err, "bad output format specified for outfile\n");
508 goto end;
509 }
510 if (!i) {
511 BIO_printf(bio_err, "unable to write DH parameters\n");
512 ERR_print_errors(bio_err);
513 goto end;
514 }
515 }
516 ret = 0;
517 end:
518 if (in != NULL)
519 BIO_free(in);
520 if (out != NULL)
521 BIO_free_all(out);
522 if (dh != NULL)
523 DH_free(dh);
524 release_engine(e);
525 apps_shutdown();
526 OPENSSL_EXIT(ret);
527 }
528
529 /* dh_cb is identical to dsa_cb in apps/dsaparam.c */
dh_cb(int p,int n,BN_GENCB * cb)530 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb)
531 {
532 char c = '*';
533
534 if (p == 0)
535 c = '.';
536 if (p == 1)
537 c = '+';
538 if (p == 2)
539 c = '*';
540 if (p == 3)
541 c = '\n';
542 BIO_write(cb->arg, &c, 1);
543 (void)BIO_flush(cb->arg);
544 # ifdef LINT
545 p = n;
546 # endif
547 return 1;
548 }
549
550 #else /* !OPENSSL_NO_DH */
551
552 # if PEDANTIC
553 static void *dummy = &dummy;
554 # endif
555
556 #endif
557