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-rw-r--r--src/usr.bin/openssl/asn1pars.c406
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diff --git a/src/usr.bin/openssl/asn1pars.c b/src/usr.bin/openssl/asn1pars.c
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1/* $OpenBSD: asn1pars.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/* 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
70#include <openssl/err.h>
71#include <openssl/evp.h>
72#include <openssl/pem.h>
73#include <openssl/x509.h>
74
75/* -inform arg - input format - default PEM (DER or PEM)
76 * -in arg - input file - default stdin
77 * -i - indent the details by depth
78 * -offset - where in the file to start
79 * -length - how many bytes to use
80 * -oid file - extra oid description file
81 */
82
83int asn1parse_main(int, char **);
84
85static int do_generate(BIO * bio, char *genstr, char *genconf, BUF_MEM * buf);
86
87int
88asn1parse_main(int argc, char **argv)
89{
90 int i, badops = 0, offset = 0, ret = 1, j;
91 unsigned int length = 0;
92 long num, tmplen;
93 BIO *in = NULL, *out = NULL, *b64 = NULL, *derout = NULL;
94 int informat, indent = 0, noout = 0, dump = 0;
95 char *infile = NULL, *str = NULL, *prog, *oidfile = NULL, *derfile = NULL;
96 char *genstr = NULL, *genconf = NULL;
97 const char *errstr = NULL;
98 unsigned char *tmpbuf;
99 const unsigned char *ctmpbuf;
100 BUF_MEM *buf = NULL;
101 STACK_OF(OPENSSL_STRING) * osk = NULL;
102 ASN1_TYPE *at = NULL;
103
104 informat = FORMAT_PEM;
105
106 prog = argv[0];
107 argc--;
108 argv++;
109 if ((osk = sk_OPENSSL_STRING_new_null()) == NULL) {
110 BIO_printf(bio_err, "Memory allocation failure\n");
111 goto end;
112 }
113 while (argc >= 1) {
114 if (strcmp(*argv, "-inform") == 0) {
115 if (--argc < 1)
116 goto bad;
117 informat = str2fmt(*(++argv));
118 } else if (strcmp(*argv, "-in") == 0) {
119 if (--argc < 1)
120 goto bad;
121 infile = *(++argv);
122 } else if (strcmp(*argv, "-out") == 0) {
123 if (--argc < 1)
124 goto bad;
125 derfile = *(++argv);
126 } else if (strcmp(*argv, "-i") == 0) {
127 indent = 1;
128 } else if (strcmp(*argv, "-noout") == 0)
129 noout = 1;
130 else if (strcmp(*argv, "-oid") == 0) {
131 if (--argc < 1)
132 goto bad;
133 oidfile = *(++argv);
134 } else if (strcmp(*argv, "-offset") == 0) {
135 if (--argc < 1)
136 goto bad;
137 offset = strtonum(*(++argv), 0, INT_MAX, &errstr);
138 if (errstr)
139 goto bad;
140 } else if (strcmp(*argv, "-length") == 0) {
141 if (--argc < 1)
142 goto bad;
143 length = strtonum(*(++argv), 1, UINT_MAX, &errstr);
144 if (errstr)
145 goto bad;
146 } else if (strcmp(*argv, "-dump") == 0) {
147 dump = -1;
148 } else if (strcmp(*argv, "-dlimit") == 0) {
149 if (--argc < 1)
150 goto bad;
151 dump = strtonum(*(++argv), 1, INT_MAX, &errstr);
152 if (errstr)
153 goto bad;
154 } else if (strcmp(*argv, "-strparse") == 0) {
155 if (--argc < 1)
156 goto bad;
157 sk_OPENSSL_STRING_push(osk, *(++argv));
158 } else if (strcmp(*argv, "-genstr") == 0) {
159 if (--argc < 1)
160 goto bad;
161 genstr = *(++argv);
162 } else if (strcmp(*argv, "-genconf") == 0) {
163 if (--argc < 1)
164 goto bad;
165 genconf = *(++argv);
166 } else {
167 BIO_printf(bio_err, "unknown option %s\n", *argv);
168 badops = 1;
169 break;
170 }
171 argc--;
172 argv++;
173 }
174
175 if (badops) {
176bad:
177 BIO_printf(bio_err, "%s [options] <infile\n", prog);
178 BIO_printf(bio_err, "where options are\n");
179 BIO_printf(bio_err, " -inform arg input format - one of DER PEM\n");
180 BIO_printf(bio_err, " -in arg input file\n");
181 BIO_printf(bio_err, " -out arg output file (output format is always DER\n");
182 BIO_printf(bio_err, " -noout arg don't produce any output\n");
183 BIO_printf(bio_err, " -offset arg offset into file\n");
184 BIO_printf(bio_err, " -length arg length of section in file\n");
185 BIO_printf(bio_err, " -i indent entries\n");
186 BIO_printf(bio_err, " -dump dump unknown data in hex form\n");
187 BIO_printf(bio_err, " -dlimit arg dump the first arg bytes of unknown data in hex form\n");
188 BIO_printf(bio_err, " -oid file file of extra oid definitions\n");
189 BIO_printf(bio_err, " -strparse offset\n");
190 BIO_printf(bio_err, " a series of these can be used to 'dig' into multiple\n");
191 BIO_printf(bio_err, " ASN1 blob wrappings\n");
192 BIO_printf(bio_err, " -genstr str string to generate ASN1 structure from\n");
193 BIO_printf(bio_err, " -genconf file file to generate ASN1 structure from\n");
194 goto end;
195 }
196 ERR_load_crypto_strings();
197
198 in = BIO_new(BIO_s_file());
199 out = BIO_new(BIO_s_file());
200 if ((in == NULL) || (out == NULL)) {
201 ERR_print_errors(bio_err);
202 goto end;
203 }
204 BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
205
206 if (oidfile != NULL) {
207 if (BIO_read_filename(in, oidfile) <= 0) {
208 BIO_printf(bio_err, "problems opening %s\n", oidfile);
209 ERR_print_errors(bio_err);
210 goto end;
211 }
212 OBJ_create_objects(in);
213 }
214 if (infile == NULL)
215 BIO_set_fp(in, stdin, BIO_NOCLOSE);
216 else {
217 if (BIO_read_filename(in, infile) <= 0) {
218 perror(infile);
219 goto end;
220 }
221 }
222
223 if (derfile) {
224 if (!(derout = BIO_new_file(derfile, "wb"))) {
225 BIO_printf(bio_err, "problems opening %s\n", derfile);
226 ERR_print_errors(bio_err);
227 goto end;
228 }
229 }
230 if ((buf = BUF_MEM_new()) == NULL)
231 goto end;
232 if (!BUF_MEM_grow(buf, BUFSIZ * 8))
233 goto end; /* Pre-allocate :-) */
234
235 if (genstr || genconf) {
236 num = do_generate(bio_err, genstr, genconf, buf);
237 if (num < 0) {
238 ERR_print_errors(bio_err);
239 goto end;
240 }
241 } else {
242
243 if (informat == FORMAT_PEM) {
244 BIO *tmp;
245
246 if ((b64 = BIO_new(BIO_f_base64())) == NULL)
247 goto end;
248 BIO_push(b64, in);
249 tmp = in;
250 in = b64;
251 b64 = tmp;
252 }
253 num = 0;
254 for (;;) {
255 if (!BUF_MEM_grow(buf, (int) num + BUFSIZ))
256 goto end;
257 i = BIO_read(in, &(buf->data[num]), BUFSIZ);
258 if (i <= 0)
259 break;
260 num += i;
261 }
262 }
263 str = buf->data;
264
265 /* If any structs to parse go through in sequence */
266
267 if (sk_OPENSSL_STRING_num(osk)) {
268 tmpbuf = (unsigned char *) str;
269 tmplen = num;
270 for (i = 0; i < sk_OPENSSL_STRING_num(osk); i++) {
271 ASN1_TYPE *atmp;
272 int typ;
273 j = strtonum(sk_OPENSSL_STRING_value(osk, i),
274 1, INT_MAX, &errstr);
275 if (errstr) {
276 BIO_printf(bio_err,
277 "'%s' is an invalid number: %s\n",
278 sk_OPENSSL_STRING_value(osk, i), errstr);
279 continue;
280 }
281 tmpbuf += j;
282 tmplen -= j;
283 atmp = at;
284 ctmpbuf = tmpbuf;
285 at = d2i_ASN1_TYPE(NULL, &ctmpbuf, tmplen);
286 ASN1_TYPE_free(atmp);
287 if (!at) {
288 BIO_printf(bio_err, "Error parsing structure\n");
289 ERR_print_errors(bio_err);
290 goto end;
291 }
292 typ = ASN1_TYPE_get(at);
293 if ((typ == V_ASN1_OBJECT) ||
294 (typ == V_ASN1_NULL)) {
295 BIO_printf(bio_err, "Can't parse %s type\n",
296 typ == V_ASN1_NULL ? "NULL" : "OBJECT");
297 ERR_print_errors(bio_err);
298 goto end;
299 }
300 /* hmm... this is a little evil but it works */
301 tmpbuf = at->value.asn1_string->data;
302 tmplen = at->value.asn1_string->length;
303 }
304 str = (char *) tmpbuf;
305 num = tmplen;
306 }
307 if (offset >= num) {
308 BIO_printf(bio_err, "Error: offset too large\n");
309 goto end;
310 }
311 num -= offset;
312
313 if ((length == 0) || ((long) length > num))
314 length = (unsigned int) num;
315 if (derout) {
316 if (BIO_write(derout, str + offset, length) != (int) length) {
317 BIO_printf(bio_err, "Error writing output\n");
318 ERR_print_errors(bio_err);
319 goto end;
320 }
321 }
322 if (!noout &&
323 !ASN1_parse_dump(out, (unsigned char *) &(str[offset]), length,
324 indent, dump)) {
325 ERR_print_errors(bio_err);
326 goto end;
327 }
328 ret = 0;
329end:
330 BIO_free(derout);
331 if (in != NULL)
332 BIO_free(in);
333 if (out != NULL)
334 BIO_free_all(out);
335 if (b64 != NULL)
336 BIO_free(b64);
337 if (ret != 0)
338 ERR_print_errors(bio_err);
339 if (buf != NULL)
340 BUF_MEM_free(buf);
341 if (at != NULL)
342 ASN1_TYPE_free(at);
343 if (osk != NULL)
344 sk_OPENSSL_STRING_free(osk);
345 OBJ_cleanup();
346
347 return (ret);
348}
349
350static int
351do_generate(BIO * bio, char *genstr, char *genconf, BUF_MEM * buf)
352{
353 CONF *cnf = NULL;
354 int len;
355 long errline;
356 unsigned char *p;
357 ASN1_TYPE *atyp = NULL;
358
359 if (genconf) {
360 cnf = NCONF_new(NULL);
361 if (!NCONF_load(cnf, genconf, &errline))
362 goto conferr;
363 if (!genstr)
364 genstr = NCONF_get_string(cnf, "default", "asn1");
365 if (!genstr) {
366 BIO_printf(bio, "Can't find 'asn1' in '%s'\n", genconf);
367 goto err;
368 }
369 }
370 atyp = ASN1_generate_nconf(genstr, cnf);
371 NCONF_free(cnf);
372 cnf = NULL;
373
374 if (!atyp)
375 return -1;
376
377 len = i2d_ASN1_TYPE(atyp, NULL);
378
379 if (len <= 0)
380 goto err;
381
382 if (!BUF_MEM_grow(buf, len))
383 goto err;
384
385 p = (unsigned char *) buf->data;
386
387 i2d_ASN1_TYPE(atyp, &p);
388
389 ASN1_TYPE_free(atyp);
390 return len;
391
392conferr:
393
394 if (errline > 0)
395 BIO_printf(bio, "Error on line %ld of config file '%s'\n",
396 errline, genconf);
397 else
398 BIO_printf(bio, "Error loading config file '%s'\n", genconf);
399
400err:
401 NCONF_free(cnf);
402 ASN1_TYPE_free(atyp);
403
404 return -1;
405
406}
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