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-rw-r--r--src/usr.bin/openssl/dhparam.c472
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diff --git a/src/usr.bin/openssl/dhparam.c b/src/usr.bin/openssl/dhparam.c
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1/* $OpenBSD: dhparam.c,v 1.1 2014/08/26 17:47:24 jsing Exp $ */
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
114#ifndef OPENSSL_NO_DH
115
116#include <stdio.h>
117#include <stdlib.h>
118#include <string.h>
119#include <time.h>
120
121#include "apps.h"
122
123#include <openssl/bio.h>
124#include <openssl/bn.h>
125#include <openssl/err.h>
126#include <openssl/dh.h>
127#include <openssl/pem.h>
128#include <openssl/x509.h>
129
130#include <openssl/dsa.h>
131
132#define DEFBITS 512
133
134/* -inform arg - input format - default PEM (DER or PEM)
135 * -outform arg - output format - default PEM
136 * -in arg - input file - default stdin
137 * -out arg - output file - default stdout
138 * -dsaparam - read or generate DSA parameters, convert to DH
139 * -check - check the parameters are ok
140 * -noout
141 * -text
142 * -C
143 */
144
145static int dh_cb(int p, int n, BN_GENCB * cb);
146
147int dhparam_main(int, char **);
148
149int
150dhparam_main(int argc, char **argv)
151{
152 DH *dh = NULL;
153 int i, badops = 0, text = 0;
154 int dsaparam = 0;
155 BIO *in = NULL, *out = NULL;
156 int informat, outformat, check = 0, noout = 0, C = 0, ret = 1;
157 char *infile, *outfile, *prog;
158#ifndef OPENSSL_NO_ENGINE
159 char *engine = NULL;
160#endif
161 int num = 0, g = 0;
162
163 infile = NULL;
164 outfile = NULL;
165 informat = FORMAT_PEM;
166 outformat = FORMAT_PEM;
167
168 prog = argv[0];
169 argc--;
170 argv++;
171 while (argc >= 1) {
172 if (strcmp(*argv, "-inform") == 0) {
173 if (--argc < 1)
174 goto bad;
175 informat = str2fmt(*(++argv));
176 } else if (strcmp(*argv, "-outform") == 0) {
177 if (--argc < 1)
178 goto bad;
179 outformat = str2fmt(*(++argv));
180 } else if (strcmp(*argv, "-in") == 0) {
181 if (--argc < 1)
182 goto bad;
183 infile = *(++argv);
184 } else if (strcmp(*argv, "-out") == 0) {
185 if (--argc < 1)
186 goto bad;
187 outfile = *(++argv);
188 }
189#ifndef OPENSSL_NO_ENGINE
190 else if (strcmp(*argv, "-engine") == 0) {
191 if (--argc < 1)
192 goto bad;
193 engine = *(++argv);
194 }
195#endif
196 else if (strcmp(*argv, "-check") == 0)
197 check = 1;
198 else if (strcmp(*argv, "-text") == 0)
199 text = 1;
200 else if (strcmp(*argv, "-dsaparam") == 0)
201 dsaparam = 1;
202 else if (strcmp(*argv, "-C") == 0)
203 C = 1;
204 else if (strcmp(*argv, "-noout") == 0)
205 noout = 1;
206 else if (strcmp(*argv, "-2") == 0)
207 g = 2;
208 else if (strcmp(*argv, "-5") == 0)
209 g = 5;
210 else if (((sscanf(*argv, "%d", &num) == 0) || (num <= 0)))
211 goto bad;
212 argv++;
213 argc--;
214 }
215
216 if (badops) {
217bad:
218 BIO_printf(bio_err, "%s [options] [numbits]\n", prog);
219 BIO_printf(bio_err, "where options are\n");
220 BIO_printf(bio_err, " -inform arg input format - one of DER PEM\n");
221 BIO_printf(bio_err, " -outform arg output format - one of DER PEM\n");
222 BIO_printf(bio_err, " -in arg input file\n");
223 BIO_printf(bio_err, " -out arg output file\n");
224 BIO_printf(bio_err, " -dsaparam read or generate DSA parameters, convert to DH\n");
225 BIO_printf(bio_err, " -check check the DH parameters\n");
226 BIO_printf(bio_err, " -text print a text form of the DH parameters\n");
227 BIO_printf(bio_err, " -C Output C code\n");
228 BIO_printf(bio_err, " -2 generate parameters using 2 as the generator value\n");
229 BIO_printf(bio_err, " -5 generate parameters using 5 as the generator value\n");
230 BIO_printf(bio_err, " numbits number of bits in to generate (default 512)\n");
231#ifndef OPENSSL_NO_ENGINE
232 BIO_printf(bio_err, " -engine e use engine e, possibly a hardware device.\n");
233#endif
234 BIO_printf(bio_err, " -noout no output\n");
235 goto end;
236 }
237 ERR_load_crypto_strings();
238
239#ifndef OPENSSL_NO_ENGINE
240 setup_engine(bio_err, engine, 0);
241#endif
242
243 if (g && !num)
244 num = DEFBITS;
245
246 if (dsaparam) {
247 if (g) {
248 BIO_printf(bio_err, "generator may not be chosen for DSA parameters\n");
249 goto end;
250 }
251 } else
252 {
253 /* DH parameters */
254 if (num && !g)
255 g = 2;
256 }
257
258 if (num) {
259
260 BN_GENCB cb;
261 BN_GENCB_set(&cb, dh_cb, bio_err);
262 if (dsaparam) {
263 DSA *dsa = DSA_new();
264
265 BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n", num);
266 if (!dsa || !DSA_generate_parameters_ex(dsa, num,
267 NULL, 0, NULL, NULL, &cb)) {
268 if (dsa)
269 DSA_free(dsa);
270 ERR_print_errors(bio_err);
271 goto end;
272 }
273 dh = DSA_dup_DH(dsa);
274 DSA_free(dsa);
275 if (dh == NULL) {
276 ERR_print_errors(bio_err);
277 goto end;
278 }
279 } else
280 {
281 dh = DH_new();
282 BIO_printf(bio_err, "Generating DH parameters, %d bit long safe prime, generator %d\n", num, g);
283 BIO_printf(bio_err, "This is going to take a long time\n");
284 if (!dh || !DH_generate_parameters_ex(dh, num, g, &cb)) {
285 ERR_print_errors(bio_err);
286 goto end;
287 }
288 }
289 } else {
290
291 in = BIO_new(BIO_s_file());
292 if (in == NULL) {
293 ERR_print_errors(bio_err);
294 goto end;
295 }
296 if (infile == NULL)
297 BIO_set_fp(in, stdin, BIO_NOCLOSE);
298 else {
299 if (BIO_read_filename(in, infile) <= 0) {
300 perror(infile);
301 goto end;
302 }
303 }
304
305 if (informat != FORMAT_ASN1 && informat != FORMAT_PEM) {
306 BIO_printf(bio_err, "bad input format specified\n");
307 goto end;
308 }
309 if (dsaparam) {
310 DSA *dsa;
311
312 if (informat == FORMAT_ASN1)
313 dsa = d2i_DSAparams_bio(in, NULL);
314 else /* informat == FORMAT_PEM */
315 dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
316
317 if (dsa == NULL) {
318 BIO_printf(bio_err, "unable to load DSA parameters\n");
319 ERR_print_errors(bio_err);
320 goto end;
321 }
322 dh = DSA_dup_DH(dsa);
323 DSA_free(dsa);
324 if (dh == NULL) {
325 ERR_print_errors(bio_err);
326 goto end;
327 }
328 } else
329 {
330 if (informat == FORMAT_ASN1)
331 dh = d2i_DHparams_bio(in, NULL);
332 else /* informat == FORMAT_PEM */
333 dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
334
335 if (dh == NULL) {
336 BIO_printf(bio_err, "unable to load DH parameters\n");
337 ERR_print_errors(bio_err);
338 goto end;
339 }
340 }
341
342 /* dh != NULL */
343 }
344
345 out = BIO_new(BIO_s_file());
346 if (out == NULL) {
347 ERR_print_errors(bio_err);
348 goto end;
349 }
350 if (outfile == NULL) {
351 BIO_set_fp(out, stdout, BIO_NOCLOSE);
352 } else {
353 if (BIO_write_filename(out, outfile) <= 0) {
354 perror(outfile);
355 goto end;
356 }
357 }
358
359
360 if (text) {
361 DHparams_print(out, dh);
362 }
363 if (check) {
364 if (!DH_check(dh, &i)) {
365 ERR_print_errors(bio_err);
366 goto end;
367 }
368 if (i & DH_CHECK_P_NOT_PRIME)
369 printf("p value is not prime\n");
370 if (i & DH_CHECK_P_NOT_SAFE_PRIME)
371 printf("p value is not a safe prime\n");
372 if (i & DH_UNABLE_TO_CHECK_GENERATOR)
373 printf("unable to check the generator value\n");
374 if (i & DH_NOT_SUITABLE_GENERATOR)
375 printf("the g value is not a generator\n");
376 if (i == 0)
377 printf("DH parameters appear to be ok.\n");
378 }
379 if (C) {
380 unsigned char *data;
381 int len, l, bits;
382
383 len = BN_num_bytes(dh->p);
384 bits = BN_num_bits(dh->p);
385 data = malloc(len);
386 if (data == NULL) {
387 perror("malloc");
388 goto end;
389 }
390 printf("#ifndef HEADER_DH_H\n"
391 "#include <openssl/dh.h>\n"
392 "#endif\n");
393 printf("DH *get_dh%d()\n\t{\n", bits);
394
395 l = BN_bn2bin(dh->p, data);
396 printf("\tstatic unsigned char dh%d_p[] = {", bits);
397 for (i = 0; i < l; i++) {
398 if ((i % 12) == 0)
399 printf("\n\t\t");
400 printf("0x%02X, ", data[i]);
401 }
402 printf("\n\t\t};\n");
403
404 l = BN_bn2bin(dh->g, data);
405 printf("\tstatic unsigned char dh%d_g[] = {", bits);
406 for (i = 0; i < l; i++) {
407 if ((i % 12) == 0)
408 printf("\n\t\t");
409 printf("0x%02X, ", data[i]);
410 }
411 printf("\n\t\t};\n");
412
413 printf("\tDH *dh;\n\n");
414 printf("\tif ((dh = DH_new()) == NULL) return(NULL);\n");
415 printf("\tdh->p = BN_bin2bn(dh%d_p, sizeof(dh%d_p), NULL);\n",
416 bits, bits);
417 printf("\tdh->g = BN_bin2bn(dh%d_g, sizeof(dh%d_g), NULL);\n",
418 bits, bits);
419 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n");
420 printf("\t\t{ DH_free(dh); return(NULL); }\n");
421 if (dh->length)
422 printf("\tdh->length = %ld;\n", dh->length);
423 printf("\treturn(dh);\n\t}\n");
424 free(data);
425 }
426 if (!noout) {
427 if (outformat == FORMAT_ASN1)
428 i = i2d_DHparams_bio(out, dh);
429 else if (outformat == FORMAT_PEM)
430 i = PEM_write_bio_DHparams(out, dh);
431 else {
432 BIO_printf(bio_err, "bad output format specified for outfile\n");
433 goto end;
434 }
435 if (!i) {
436 BIO_printf(bio_err, "unable to write DH parameters\n");
437 ERR_print_errors(bio_err);
438 goto end;
439 }
440 }
441 ret = 0;
442
443end:
444 BIO_free(in);
445 if (out != NULL)
446 BIO_free_all(out);
447 if (dh != NULL)
448 DH_free(dh);
449
450 return (ret);
451}
452
453/* dh_cb is identical to dsa_cb in apps/dsaparam.c */
454static int
455dh_cb(int p, int n, BN_GENCB * cb)
456{
457 char c = '*';
458
459 if (p == 0)
460 c = '.';
461 if (p == 1)
462 c = '+';
463 if (p == 2)
464 c = '*';
465 if (p == 3)
466 c = '\n';
467 BIO_write(cb->arg, &c, 1);
468 (void) BIO_flush(cb->arg);
469 return 1;
470}
471
472#endif
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