GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/openssl/dhparam.c Lines: 76 175 43.4 %
Date: 2017-11-13 Branches: 44 113 38.9 %

Line Branch Exec Source
1
/* $OpenBSD: dhparam.c,v 1.9 2017/01/20 08:57:11 deraadt 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	2048
133
134
struct {
135
	int C;
136
	int check;
137
	int dsaparam;
138
	int g;
139
	char *infile;
140
	int informat;
141
	int noout;
142
	char *outfile;
143
	int outformat;
144
	int text;
145
} dhparam_config;
146
147
struct option dhparam_options[] = {
148
	{
149
		.name = "2",
150
		.desc = "Generate DH parameters with a generator value of 2 "
151
		    "(default)",
152
		.type = OPTION_VALUE,
153
		.opt.value = &dhparam_config.g,
154
		.value = 2,
155
	},
156
	{
157
		.name = "5",
158
		.desc = "Generate DH parameters with a generator value of 5",
159
		.type = OPTION_VALUE,
160
		.opt.value = &dhparam_config.g,
161
		.value = 5,
162
	},
163
	{
164
		.name = "C",
165
		.desc = "Convert DH parameters into C code",
166
		.type = OPTION_FLAG,
167
		.opt.flag = &dhparam_config.C,
168
	},
169
	{
170
		.name = "check",
171
		.desc = "Check the DH parameters",
172
		.type = OPTION_FLAG,
173
		.opt.flag = &dhparam_config.check,
174
	},
175
	{
176
		.name = "dsaparam",
177
		.desc = "Read or generate DSA parameters and convert to DH",
178
		.type = OPTION_FLAG,
179
		.opt.flag = &dhparam_config.dsaparam,
180
	},
181
	{
182
		.name = "in",
183
		.argname = "file",
184
		.desc = "Input file (default stdin)",
185
		.type = OPTION_ARG,
186
		.opt.arg = &dhparam_config.infile,
187
	},
188
	{
189
		.name = "inform",
190
		.argname = "format",
191
		.desc = "Input format (DER or PEM (default))",
192
		.type = OPTION_ARG_FORMAT,
193
		.opt.value = &dhparam_config.informat,
194
	},
195
	{
196
		.name = "noout",
197
		.desc = "Do not output encoded version of DH parameters",
198
		.type = OPTION_FLAG,
199
		.opt.flag = &dhparam_config.noout,
200
	},
201
	{
202
		.name = "out",
203
		.argname = "file",
204
		.desc = "Output file (default stdout)",
205
		.type = OPTION_ARG,
206
		.opt.arg = &dhparam_config.outfile,
207
	},
208
	{
209
		.name = "outform",
210
		.argname = "format",
211
		.desc = "Output format (DER or PEM (default))",
212
		.type = OPTION_ARG_FORMAT,
213
		.opt.value = &dhparam_config.outformat,
214
	},
215
	{
216
		.name = "text",
217
		.desc = "Print DH parameters in plain text",
218
		.type = OPTION_FLAG,
219
		.opt.flag = &dhparam_config.text,
220
	},
221
	{ NULL },
222
};
223
224
static void
225
dhparam_usage()
226
{
227
8
	fprintf(stderr,
228
	    "usage: dhparam [-2 | -5] [-C] [-check] [-dsaparam]\n"
229
	    "    [-in file] [-inform DER | PEM] [-noout] [-out file]\n"
230
	    "    [-outform DER | PEM] [-text] [numbits]\n\n");
231
4
	options_usage(dhparam_options);
232
4
}
233
234
static int dh_cb(int p, int n, BN_GENCB * cb);
235
236
int
237
dhparam_main(int argc, char **argv)
238
{
239
	BIO *in = NULL, *out = NULL;
240
24
	char *num_bits = NULL;
241
	DH *dh = NULL;
242
12
	int num = 0;
243
	int ret = 1;
244
12
	int i;
245
246
12
	if (single_execution) {
247
12
		if (pledge("stdio cpath wpath rpath flock", NULL) == -1) {
248
			perror("pledge");
249
			exit(1);
250
		}
251
	}
252
253
12
	memset(&dhparam_config, 0, sizeof(dhparam_config));
254
255
12
	dhparam_config.informat = FORMAT_PEM;
256
12
	dhparam_config.outformat = FORMAT_PEM;
257
258
12
	if (options_parse(argc, argv, dhparam_options, &num_bits, NULL) != 0) {
259
4
		dhparam_usage();
260
4
		return (1);
261
	}
262
263
8
	if (num_bits != NULL) {
264
		if(sscanf(num_bits, "%d", &num) == 0 || num <= 0) {
265
			BIO_printf(bio_err, "invalid number of bits: %s\n",
266
			    num_bits);
267
			return (1);
268
		}
269
	}
270
271
8
	if (dhparam_config.g && !num)
272
4
		num = DEFBITS;
273
274
8
	if (dhparam_config.dsaparam) {
275
		if (dhparam_config.g) {
276
			BIO_printf(bio_err, "generator may not be chosen for DSA parameters\n");
277
			goto end;
278
		}
279
	} else {
280
		/* DH parameters */
281
8
		if (num && !dhparam_config.g)
282
			dhparam_config.g = 2;
283
	}
284
285
8
	if (num) {
286
287
4
		BN_GENCB cb;
288
4
		BN_GENCB_set(&cb, dh_cb, bio_err);
289
4
		if (dhparam_config.dsaparam) {
290
			DSA *dsa = DSA_new();
291
292
			BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n", num);
293
			if (!dsa || !DSA_generate_parameters_ex(dsa, num,
294
				NULL, 0, NULL, NULL, &cb)) {
295
				if (dsa)
296
					DSA_free(dsa);
297
				ERR_print_errors(bio_err);
298
				goto end;
299
			}
300
			dh = DSA_dup_DH(dsa);
301
			DSA_free(dsa);
302
			if (dh == NULL) {
303
				ERR_print_errors(bio_err);
304
				goto end;
305
			}
306
		} else {
307
4
			dh = DH_new();
308
4
			BIO_printf(bio_err, "Generating DH parameters, %d bit long safe prime, generator %d\n", num, dhparam_config.g);
309
4
			BIO_printf(bio_err, "This is going to take a long time\n");
310

8
			if (!dh || !DH_generate_parameters_ex(dh, num, dhparam_config.g, &cb)) {
311
				ERR_print_errors(bio_err);
312
				goto end;
313
			}
314
		}
315
16
	} else {
316
317
4
		in = BIO_new(BIO_s_file());
318
4
		if (in == NULL) {
319
			ERR_print_errors(bio_err);
320
			goto end;
321
		}
322
4
		if (dhparam_config.infile == NULL)
323
			BIO_set_fp(in, stdin, BIO_NOCLOSE);
324
		else {
325
4
			if (BIO_read_filename(in, dhparam_config.infile) <= 0) {
326
				perror(dhparam_config.infile);
327
				goto end;
328
			}
329
		}
330
331
8
		if (dhparam_config.informat != FORMAT_ASN1 &&
332
4
		    dhparam_config.informat != FORMAT_PEM) {
333
			BIO_printf(bio_err, "bad input format specified\n");
334
			goto end;
335
		}
336
4
		if (dhparam_config.dsaparam) {
337
			DSA *dsa;
338
339
			if (dhparam_config.informat == FORMAT_ASN1)
340
				dsa = d2i_DSAparams_bio(in, NULL);
341
			else	/* informat == FORMAT_PEM */
342
				dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
343
344
			if (dsa == NULL) {
345
				BIO_printf(bio_err, "unable to load DSA parameters\n");
346
				ERR_print_errors(bio_err);
347
				goto end;
348
			}
349
			dh = DSA_dup_DH(dsa);
350
			DSA_free(dsa);
351
			if (dh == NULL) {
352
				ERR_print_errors(bio_err);
353
				goto end;
354
			}
355
		} else
356
		{
357
4
			if (dhparam_config.informat == FORMAT_ASN1)
358
				dh = d2i_DHparams_bio(in, NULL);
359
			else	/* informat == FORMAT_PEM */
360
4
				dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
361
362
4
			if (dh == NULL) {
363
				BIO_printf(bio_err, "unable to load DH parameters\n");
364
				ERR_print_errors(bio_err);
365
				goto end;
366
			}
367
		}
368
369
		/* dh != NULL */
370
	}
371
372
8
	out = BIO_new(BIO_s_file());
373
8
	if (out == NULL) {
374
		ERR_print_errors(bio_err);
375
		goto end;
376
	}
377
8
	if (dhparam_config.outfile == NULL) {
378
		BIO_set_fp(out, stdout, BIO_NOCLOSE);
379
	} else {
380
8
		if (BIO_write_filename(out, dhparam_config.outfile) <= 0) {
381
			perror(dhparam_config.outfile);
382
			goto end;
383
		}
384
	}
385
386
387
8
	if (dhparam_config.text) {
388
4
		DHparams_print(out, dh);
389
4
	}
390
8
	if (dhparam_config.check) {
391
4
		if (!DH_check(dh, &i)) {
392
			ERR_print_errors(bio_err);
393
			goto end;
394
		}
395
4
		if (i & DH_CHECK_P_NOT_PRIME)
396
			printf("p value is not prime\n");
397
4
		if (i & DH_CHECK_P_NOT_SAFE_PRIME)
398
			printf("p value is not a safe prime\n");
399
4
		if (i & DH_UNABLE_TO_CHECK_GENERATOR)
400
			printf("unable to check the generator value\n");
401
4
		if (i & DH_NOT_SUITABLE_GENERATOR)
402
			printf("the g value is not a generator\n");
403
4
		if (i == 0)
404
4
			printf("DH parameters appear to be ok.\n");
405
	}
406
8
	if (dhparam_config.C) {
407
		unsigned char *data;
408
		int len, l, bits;
409
410
		len = BN_num_bytes(dh->p);
411
		bits = BN_num_bits(dh->p);
412
		data = malloc(len);
413
		if (data == NULL) {
414
			perror("malloc");
415
			goto end;
416
		}
417
		printf("#ifndef HEADER_DH_H\n"
418
		    "#include <openssl/dh.h>\n"
419
		    "#endif\n");
420
		printf("DH *get_dh%d()\n\t{\n", bits);
421
422
		l = BN_bn2bin(dh->p, data);
423
		printf("\tstatic unsigned char dh%d_p[] = {", bits);
424
		for (i = 0; i < l; i++) {
425
			if ((i % 12) == 0)
426
				printf("\n\t\t");
427
			printf("0x%02X, ", data[i]);
428
		}
429
		printf("\n\t\t};\n");
430
431
		l = BN_bn2bin(dh->g, data);
432
		printf("\tstatic unsigned char dh%d_g[] = {", bits);
433
		for (i = 0; i < l; i++) {
434
			if ((i % 12) == 0)
435
				printf("\n\t\t");
436
			printf("0x%02X, ", data[i]);
437
		}
438
		printf("\n\t\t};\n");
439
440
		printf("\tDH *dh;\n\n");
441
		printf("\tif ((dh = DH_new()) == NULL) return(NULL);\n");
442
		printf("\tdh->p = BN_bin2bn(dh%d_p, sizeof(dh%d_p), NULL);\n",
443
		    bits, bits);
444
		printf("\tdh->g = BN_bin2bn(dh%d_g, sizeof(dh%d_g), NULL);\n",
445
		    bits, bits);
446
		printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n");
447
		printf("\t\t{ DH_free(dh); return(NULL); }\n");
448
		if (dh->length)
449
			printf("\tdh->length = %ld;\n", dh->length);
450
		printf("\treturn(dh);\n\t}\n");
451
		free(data);
452
	}
453
8
	if (!dhparam_config.noout) {
454
8
		if (dhparam_config.outformat == FORMAT_ASN1)
455
			i = i2d_DHparams_bio(out, dh);
456
8
		else if (dhparam_config.outformat == FORMAT_PEM)
457
8
			i = PEM_write_bio_DHparams(out, dh);
458
		else {
459
			BIO_printf(bio_err, "bad output format specified for outfile\n");
460
			goto end;
461
		}
462
8
		if (!i) {
463
			BIO_printf(bio_err, "unable to write DH parameters\n");
464
			ERR_print_errors(bio_err);
465
			goto end;
466
		}
467
	}
468
8
	ret = 0;
469
470
end:
471
8
	BIO_free(in);
472
8
	if (out != NULL)
473
8
		BIO_free_all(out);
474
8
	if (dh != NULL)
475
8
		DH_free(dh);
476
477
8
	return (ret);
478
12
}
479
480
/* dh_cb is identical to dsa_cb in apps/dsaparam.c */
481
static int
482
dh_cb(int p, int n, BN_GENCB * cb)
483
{
484
54622
	char c = '*';
485
486
27311
	if (p == 0)
487
		c = '.';
488
27311
	if (p == 1)
489
		c = '+';
490
27311
	if (p == 2)
491
		c = '*';
492
27311
	if (p == 3)
493
		c = '\n';
494
27311
	BIO_write(cb->arg, &c, 1);
495
27311
	(void) BIO_flush(cb->arg);
496
27311
	return 1;
497
27311
}
498
499
#endif