GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/openssl/asn1pars.c Lines: 0 169 0.0 %
Date: 2016-12-06 Branches: 0 92 0.0 %

Line Branch Exec Source
1
/* $OpenBSD: asn1pars.c,v 1.6 2015/10/17 15:00:11 doug 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
/* A nice addition from Dr Stephen Henson <steve@openssl.org> to
60
 * add the -strparse option which parses nested binary structures
61
 */
62
63
#include <stdio.h>
64
#include <stdlib.h>
65
#include <limits.h>
66
#include <string.h>
67
68
#include "apps.h"
69
#include "progs.h"
70
71
#include <openssl/err.h>
72
#include <openssl/evp.h>
73
#include <openssl/pem.h>
74
#include <openssl/x509.h>
75
76
static struct {
77
	char *derfile;
78
	int dump;
79
	char *genconf;
80
	char *genstr;
81
	int indent;
82
	char *infile;
83
	int informat;
84
	unsigned int length;
85
	int noout;
86
	int offset;
87
	char *oidfile;
88
	STACK_OF(OPENSSL_STRING) *osk;
89
} asn1pars_config;
90
91
static int
92
asn1pars_opt_dlimit(char *arg)
93
{
94
	const char *errstr;
95
96
	asn1pars_config.dump = strtonum(arg, 1, INT_MAX, &errstr);
97
	if (errstr) {
98
		fprintf(stderr, "-dlimit must be from 1 to INT_MAX: %s\n",
99
		    errstr);
100
		return (-1);
101
	}
102
	return (0);
103
}
104
105
static int
106
asn1pars_opt_length(char *arg)
107
{
108
	const char *errstr;
109
110
	asn1pars_config.length = strtonum(arg, 1, UINT_MAX, &errstr);
111
	if (errstr) {
112
		fprintf(stderr, "-length must be from 1 to UINT_MAX: %s\n",
113
		    errstr);
114
		return (-1);
115
	}
116
	return (0);
117
}
118
119
static int
120
asn1pars_opt_strparse(char *arg)
121
{
122
	if (sk_OPENSSL_STRING_push(asn1pars_config.osk, arg) == 0) {
123
		fprintf(stderr, "-strparse cannot add argument\n");
124
		return (-1);
125
	}
126
	return (0);
127
}
128
129
static struct option asn1pars_options[] = {
130
	{
131
		.name = "dump",
132
		.desc = "Dump unknown data in hex form",
133
		.type = OPTION_VALUE,
134
		.value = -1,
135
		.opt.value = &asn1pars_config.dump,
136
	},
137
	{
138
		.name = "dlimit",
139
		.argname = "num",
140
		.desc = "Dump the first num bytes of unknown data in hex form",
141
		.type = OPTION_ARG_FUNC,
142
		.opt.argfunc = asn1pars_opt_dlimit,
143
	},
144
	{
145
		.name = "genconf",
146
		.argname = "file",
147
		.desc = "File to generate ASN.1 structure from",
148
		.type = OPTION_ARG,
149
		.opt.arg = &asn1pars_config.genconf,
150
	},
151
	{
152
		.name = "genstr",
153
		.argname = "string",
154
		.desc = "String to generate ASN.1 structure from",
155
		.type = OPTION_ARG,
156
		.opt.arg = &asn1pars_config.genstr,
157
	},
158
	{
159
		.name = "i",
160
		.desc = "Indent output according to depth of structures",
161
		.type = OPTION_FLAG,
162
		.opt.flag = &asn1pars_config.indent,
163
	},
164
	{
165
		.name = "in",
166
		.argname = "file",
167
		.desc = "The input file (default stdin)",
168
		.type = OPTION_ARG,
169
		.opt.arg = &asn1pars_config.infile,
170
	},
171
	{
172
		.name = "inform",
173
		.argname = "fmt",
174
		.desc = "Input format (DER, TXT or PEM (default))",
175
		.type = OPTION_ARG_FORMAT,
176
		.opt.value = &asn1pars_config.informat,
177
	},
178
	{
179
		.name = "length",
180
		.argname = "num",
181
		.desc = "Number of bytes to parse (default until EOF)",
182
		.type = OPTION_ARG_FUNC,
183
		.opt.argfunc = asn1pars_opt_length,
184
	},
185
	{
186
		.name = "noout",
187
		.desc = "Do not produce any output",
188
		.type = OPTION_FLAG,
189
		.opt.flag = &asn1pars_config.noout,
190
	},
191
	{
192
		.name = "offset",
193
		.argname = "num",
194
		.desc = "Offset to begin parsing",
195
		.type = OPTION_ARG_INT,
196
		.opt.value = &asn1pars_config.offset,
197
	},
198
	{
199
		.name = "oid",
200
		.argname = "file",
201
		.desc = "File containing additional object identifiers (OIDs)",
202
		.type = OPTION_ARG,
203
		.opt.arg = &asn1pars_config.oidfile,
204
	},
205
	{
206
		.name = "out",
207
		.argname = "file",
208
		.desc = "Output file in DER format",
209
		.type = OPTION_ARG,
210
		.opt.arg = &asn1pars_config.derfile,
211
	},
212
	{
213
		.name = "strparse",
214
		.argname = "offset",
215
		.desc = "Parse the content octets of ASN.1 object starting at"
216
		" offset",
217
		.type = OPTION_ARG_FUNC,
218
		.opt.argfunc = asn1pars_opt_strparse,
219
	},
220
	{ NULL },
221
};
222
223
static void
224
asn1pars_usage()
225
{
226
	fprintf(stderr,
227
	    "usage: asn1parse [-i] [-dlimit num] [-dump] [-genconf file] "
228
	    "[-genstr string]\n"
229
	    "    [-in file] [-inform fmt] [-length num] [-noout] [-offset num] "
230
	    "[-oid file]\n"
231
	    "    [-out file] [-strparse offset]\n\n");
232
	options_usage(asn1pars_options);
233
}
234
235
static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf);
236
237
int
238
asn1parse_main(int argc, char **argv)
239
{
240
	int i, j, ret = 1;
241
	long num, tmplen;
242
	BIO *in = NULL, *out = NULL, *b64 = NULL, *derout = NULL;
243
	char *str = NULL;
244
	const char *errstr = NULL;
245
	unsigned char *tmpbuf;
246
	const unsigned char *ctmpbuf;
247
	BUF_MEM *buf = NULL;
248
	ASN1_TYPE *at = NULL;
249
250
	if (single_execution) {
251
		if (pledge("stdio rpath wpath cpath", NULL) == -1) {
252
			perror("pledge");
253
			exit(1);
254
		}
255
	}
256
257
	memset(&asn1pars_config, 0, sizeof(asn1pars_config));
258
259
	asn1pars_config.informat = FORMAT_PEM;
260
	if ((asn1pars_config.osk = sk_OPENSSL_STRING_new_null()) == NULL) {
261
		BIO_printf(bio_err, "Memory allocation failure\n");
262
		goto end;
263
	}
264
265
	if (options_parse(argc, argv, asn1pars_options, NULL, NULL) != 0) {
266
		asn1pars_usage();
267
		return (1);
268
	}
269
270
	in = BIO_new(BIO_s_file());
271
	out = BIO_new(BIO_s_file());
272
	if ((in == NULL) || (out == NULL)) {
273
		ERR_print_errors(bio_err);
274
		goto end;
275
	}
276
	BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
277
278
	if (asn1pars_config.oidfile != NULL) {
279
		if (BIO_read_filename(in, asn1pars_config.oidfile) <= 0) {
280
			BIO_printf(bio_err, "problems opening %s\n",
281
			    asn1pars_config.oidfile);
282
			ERR_print_errors(bio_err);
283
			goto end;
284
		}
285
		OBJ_create_objects(in);
286
	}
287
	if (asn1pars_config.infile == NULL)
288
		BIO_set_fp(in, stdin, BIO_NOCLOSE);
289
	else {
290
		if (BIO_read_filename(in, asn1pars_config.infile) <= 0) {
291
			perror(asn1pars_config.infile);
292
			goto end;
293
		}
294
	}
295
296
	if (asn1pars_config.derfile) {
297
		if (!(derout = BIO_new_file(asn1pars_config.derfile, "wb"))) {
298
			BIO_printf(bio_err, "problems opening %s\n",
299
			    asn1pars_config.derfile);
300
			ERR_print_errors(bio_err);
301
			goto end;
302
		}
303
	}
304
	if ((buf = BUF_MEM_new()) == NULL)
305
		goto end;
306
	if (!BUF_MEM_grow(buf, BUFSIZ * 8))
307
		goto end;	/* Pre-allocate :-) */
308
309
	if (asn1pars_config.genstr || asn1pars_config.genconf) {
310
		num = do_generate(bio_err, asn1pars_config.genstr,
311
		    asn1pars_config.genconf, buf);
312
		if (num < 0) {
313
			ERR_print_errors(bio_err);
314
			goto end;
315
		}
316
	} else {
317
318
		if (asn1pars_config.informat == FORMAT_PEM) {
319
			BIO *tmp;
320
321
			if ((b64 = BIO_new(BIO_f_base64())) == NULL)
322
				goto end;
323
			BIO_push(b64, in);
324
			tmp = in;
325
			in = b64;
326
			b64 = tmp;
327
		}
328
		num = 0;
329
		for (;;) {
330
			if (!BUF_MEM_grow(buf, (int) num + BUFSIZ))
331
				goto end;
332
			i = BIO_read(in, &(buf->data[num]), BUFSIZ);
333
			if (i <= 0)
334
				break;
335
			num += i;
336
		}
337
	}
338
	str = buf->data;
339
340
	/* If any structs to parse go through in sequence */
341
342
	if (sk_OPENSSL_STRING_num(asn1pars_config.osk)) {
343
		tmpbuf = (unsigned char *) str;
344
		tmplen = num;
345
		for (i = 0; i < sk_OPENSSL_STRING_num(asn1pars_config.osk);
346
		     i++) {
347
			ASN1_TYPE *atmp;
348
			int typ;
349
			j = strtonum(
350
			    sk_OPENSSL_STRING_value(asn1pars_config.osk, i),
351
			    1, INT_MAX, &errstr);
352
			if (errstr) {
353
				BIO_printf(bio_err,
354
				    "'%s' is an invalid number: %s\n",
355
				    sk_OPENSSL_STRING_value(asn1pars_config.osk,
356
				    i), errstr);
357
				continue;
358
			}
359
			tmpbuf += j;
360
			tmplen -= j;
361
			atmp = at;
362
			ctmpbuf = tmpbuf;
363
			at = d2i_ASN1_TYPE(NULL, &ctmpbuf, tmplen);
364
			ASN1_TYPE_free(atmp);
365
			if (!at) {
366
				BIO_printf(bio_err, "Error parsing structure\n");
367
				ERR_print_errors(bio_err);
368
				goto end;
369
			}
370
			typ = ASN1_TYPE_get(at);
371
			if ((typ == V_ASN1_OBJECT) ||
372
			    (typ == V_ASN1_NULL)) {
373
				BIO_printf(bio_err, "Can't parse %s type\n",
374
				    typ == V_ASN1_NULL ? "NULL" : "OBJECT");
375
				ERR_print_errors(bio_err);
376
				goto end;
377
			}
378
			/* hmm... this is a little evil but it works */
379
			tmpbuf = at->value.asn1_string->data;
380
			tmplen = at->value.asn1_string->length;
381
		}
382
		str = (char *) tmpbuf;
383
		num = tmplen;
384
	}
385
	if (asn1pars_config.offset >= num) {
386
		BIO_printf(bio_err, "Error: offset too large\n");
387
		goto end;
388
	}
389
	num -= asn1pars_config.offset;
390
391
	if ((asn1pars_config.length == 0) ||
392
	    ((long)asn1pars_config.length > num))
393
		asn1pars_config.length = (unsigned int) num;
394
	if (derout) {
395
		if (BIO_write(derout, str + asn1pars_config.offset,
396
		    asn1pars_config.length) != (int)asn1pars_config.length) {
397
			BIO_printf(bio_err, "Error writing output\n");
398
			ERR_print_errors(bio_err);
399
			goto end;
400
		}
401
	}
402
	if (!asn1pars_config.noout &&
403
	    !ASN1_parse_dump(out,
404
	    (unsigned char *)&(str[asn1pars_config.offset]),
405
	    asn1pars_config.length, asn1pars_config.indent,
406
	    asn1pars_config.dump)) {
407
		ERR_print_errors(bio_err);
408
		goto end;
409
	}
410
	ret = 0;
411
end:
412
	BIO_free(derout);
413
	BIO_free(in);
414
	BIO_free_all(out);
415
	BIO_free(b64);
416
	if (ret != 0)
417
		ERR_print_errors(bio_err);
418
	BUF_MEM_free(buf);
419
	if (at != NULL)
420
		ASN1_TYPE_free(at);
421
	sk_OPENSSL_STRING_free(asn1pars_config.osk);
422
	OBJ_cleanup();
423
424
	return (ret);
425
}
426
427
static int
428
do_generate(BIO * bio, char *genstr, char *genconf, BUF_MEM * buf)
429
{
430
	CONF *cnf = NULL;
431
	int len;
432
	long errline;
433
	unsigned char *p;
434
	ASN1_TYPE *atyp = NULL;
435
436
	if (genconf) {
437
		cnf = NCONF_new(NULL);
438
		if (!NCONF_load(cnf, genconf, &errline))
439
			goto conferr;
440
		if (!genstr)
441
			genstr = NCONF_get_string(cnf, "default", "asn1");
442
		if (!genstr) {
443
			BIO_printf(bio, "Can't find 'asn1' in '%s'\n", genconf);
444
			goto err;
445
		}
446
	}
447
	atyp = ASN1_generate_nconf(genstr, cnf);
448
	NCONF_free(cnf);
449
	cnf = NULL;
450
451
	if (!atyp)
452
		return -1;
453
454
	len = i2d_ASN1_TYPE(atyp, NULL);
455
	if (len <= 0)
456
		goto err;
457
458
	if (!BUF_MEM_grow(buf, len))
459
		goto err;
460
461
	p = (unsigned char *) buf->data;
462
463
	i2d_ASN1_TYPE(atyp, &p);
464
465
	ASN1_TYPE_free(atyp);
466
	return len;
467
468
conferr:
469
470
	if (errline > 0)
471
		BIO_printf(bio, "Error on line %ld of config file '%s'\n",
472
		    errline, genconf);
473
	else
474
		BIO_printf(bio, "Error loading config file '%s'\n", genconf);
475
476
err:
477
	NCONF_free(cnf);
478
	ASN1_TYPE_free(atyp);
479
480
	return -1;
481
482
}