1 /* $OpenBSD: asn1pars.c,v 1.9 2018/02/07 05:47:55 jsing Exp $ */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
59 /* A nice addition from Dr Stephen Henson <steve@openssl.org> to
60 * add the -strparse option which parses nested binary structures
71 #include <openssl/err.h>
72 #include <openssl/evp.h>
73 #include <openssl/pem.h>
74 #include <openssl/x509.h>
88 STACK_OF(OPENSSL_STRING) *osk;
92 asn1pars_opt_dlimit(char *arg)
96 asn1pars_config.dump = strtonum(arg, 1, INT_MAX, &errstr);
98 fprintf(stderr, "-dlimit must be from 1 to INT_MAX: %s\n",
106 asn1pars_opt_length(char *arg)
110 asn1pars_config.length = strtonum(arg, 1, UINT_MAX, &errstr);
112 fprintf(stderr, "-length must be from 1 to UINT_MAX: %s\n",
120 asn1pars_opt_strparse(char *arg)
122 if (sk_OPENSSL_STRING_push(asn1pars_config.osk, arg) == 0) {
123 fprintf(stderr, "-strparse cannot add argument\n");
129 static struct option asn1pars_options[] = {
132 .desc = "Dump unknown data in hex form",
133 .type = OPTION_VALUE,
135 .opt.value = &asn1pars_config.dump,
140 .desc = "Dump the first num bytes of unknown data in hex form",
141 .type = OPTION_ARG_FUNC,
142 .opt.argfunc = asn1pars_opt_dlimit,
147 .desc = "File to generate ASN.1 structure from",
149 .opt.arg = &asn1pars_config.genconf,
154 .desc = "String to generate ASN.1 structure from",
156 .opt.arg = &asn1pars_config.genstr,
160 .desc = "Indent output according to depth of structures",
162 .opt.flag = &asn1pars_config.indent,
167 .desc = "The input file (default stdin)",
169 .opt.arg = &asn1pars_config.infile,
174 .desc = "Input format (DER, TXT or PEM (default))",
175 .type = OPTION_ARG_FORMAT,
176 .opt.value = &asn1pars_config.informat,
181 .desc = "Number of bytes to parse (default until EOF)",
182 .type = OPTION_ARG_FUNC,
183 .opt.argfunc = asn1pars_opt_length,
187 .desc = "Do not produce any output",
189 .opt.flag = &asn1pars_config.noout,
194 .desc = "Offset to begin parsing",
195 .type = OPTION_ARG_INT,
196 .opt.value = &asn1pars_config.offset,
201 .desc = "File containing additional object identifiers (OIDs)",
203 .opt.arg = &asn1pars_config.oidfile,
208 .desc = "Output file in DER format",
210 .opt.arg = &asn1pars_config.derfile,
215 .desc = "Parse the content octets of ASN.1 object starting at"
217 .type = OPTION_ARG_FUNC,
218 .opt.argfunc = asn1pars_opt_strparse,
227 "usage: asn1parse [-i] [-dlimit num] [-dump] [-genconf file] "
229 " [-in file] [-inform fmt] [-length num] [-noout] [-offset num] "
231 " [-out file] [-strparse offset]\n\n");
232 options_usage(asn1pars_options);
235 static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf);
238 asn1parse_main(int argc, char **argv)
242 BIO *in = NULL, *out = NULL, *b64 = NULL, *derout = NULL;
244 const char *errstr = NULL;
245 unsigned char *tmpbuf;
246 const unsigned char *ctmpbuf;
248 ASN1_TYPE *at = NULL;
250 if (single_execution) {
251 if (pledge("stdio cpath wpath rpath", NULL) == -1) {
257 memset(&asn1pars_config, 0, sizeof(asn1pars_config));
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");
265 if (options_parse(argc, argv, asn1pars_options, NULL, NULL) != 0) {
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);
276 BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
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);
285 OBJ_create_objects(in);
287 if (asn1pars_config.infile == NULL)
288 BIO_set_fp(in, stdin, BIO_NOCLOSE);
290 if (BIO_read_filename(in, asn1pars_config.infile) <= 0) {
291 perror(asn1pars_config.infile);
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);
304 if ((buf = BUF_MEM_new()) == NULL)
306 if (!BUF_MEM_grow(buf, BUFSIZ * 8))
307 goto end; /* Pre-allocate :-) */
309 if (asn1pars_config.genstr || asn1pars_config.genconf) {
310 num = do_generate(bio_err, asn1pars_config.genstr,
311 asn1pars_config.genconf, buf);
313 ERR_print_errors(bio_err);
318 if (asn1pars_config.informat == FORMAT_PEM) {
321 if ((b64 = BIO_new(BIO_f_base64())) == NULL)
330 if (!BUF_MEM_grow(buf, (int) num + BUFSIZ))
332 i = BIO_read(in, &(buf->data[num]), BUFSIZ);
340 /* If any structs to parse go through in sequence */
342 if (sk_OPENSSL_STRING_num(asn1pars_config.osk)) {
343 tmpbuf = (unsigned char *) str;
345 for (i = 0; i < sk_OPENSSL_STRING_num(asn1pars_config.osk);
350 sk_OPENSSL_STRING_value(asn1pars_config.osk, i),
351 1, INT_MAX, &errstr);
354 "'%s' is an invalid number: %s\n",
355 sk_OPENSSL_STRING_value(asn1pars_config.osk,
363 at = d2i_ASN1_TYPE(NULL, &ctmpbuf, tmplen);
364 ASN1_TYPE_free(atmp);
366 BIO_printf(bio_err, "Error parsing structure\n");
367 ERR_print_errors(bio_err);
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);
378 /* hmm... this is a little evil but it works */
379 tmpbuf = at->value.asn1_string->data;
380 tmplen = at->value.asn1_string->length;
382 str = (char *) tmpbuf;
385 if (asn1pars_config.offset >= num) {
386 BIO_printf(bio_err, "Error: offset too large\n");
389 num -= asn1pars_config.offset;
391 if ((asn1pars_config.length == 0) ||
392 ((long)asn1pars_config.length > num))
393 asn1pars_config.length = (unsigned int) num;
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);
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);
417 ERR_print_errors(bio_err);
420 sk_OPENSSL_STRING_free(asn1pars_config.osk);
427 do_generate(BIO * bio, char *genstr, char *genconf, BUF_MEM * buf)
433 ASN1_TYPE *atyp = NULL;
436 cnf = NCONF_new(NULL);
437 if (!NCONF_load(cnf, genconf, &errline))
440 genstr = NCONF_get_string(cnf, "default", "asn1");
442 BIO_printf(bio, "Can't find 'asn1' in '%s'\n", genconf);
446 atyp = ASN1_generate_nconf(genstr, cnf);
453 len = i2d_ASN1_TYPE(atyp, NULL);
457 if (!BUF_MEM_grow(buf, len))
460 p = (unsigned char *) buf->data;
462 i2d_ASN1_TYPE(atyp, &p);
464 ASN1_TYPE_free(atyp);
470 BIO_printf(bio, "Error on line %ld of config file '%s'\n",
473 BIO_printf(bio, "Error loading config file '%s'\n", genconf);
477 ASN1_TYPE_free(atyp);