Line data Source code
1 : /* crypto/asn1/asn1_par.c */
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 : #include <stdio.h>
60 : #include "cryptlib.h"
61 : #include <openssl/buffer.h>
62 : #include <openssl/objects.h>
63 : #include <openssl/asn1.h>
64 :
65 : static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed,
66 : int indent);
67 : static int asn1_parse2(BIO *bp, const unsigned char **pp, long length,
68 : int offset, int depth, int indent, int dump);
69 0 : static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed,
70 : int indent)
71 : {
72 : static const char fmt[] = "%-18s";
73 : char str[128];
74 : const char *p;
75 :
76 0 : if (constructed & V_ASN1_CONSTRUCTED)
77 : p = "cons: ";
78 : else
79 : p = "prim: ";
80 0 : if (BIO_write(bp, p, 6) < 6)
81 : goto err;
82 0 : BIO_indent(bp, indent, 128);
83 :
84 : p = str;
85 0 : if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
86 0 : BIO_snprintf(str, sizeof str, "priv [ %d ] ", tag);
87 0 : else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
88 0 : BIO_snprintf(str, sizeof str, "cont [ %d ]", tag);
89 0 : else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
90 0 : BIO_snprintf(str, sizeof str, "appl [ %d ]", tag);
91 0 : else if (tag > 30)
92 0 : BIO_snprintf(str, sizeof str, "<ASN1 %d>", tag);
93 : else
94 : p = ASN1_tag2str(tag);
95 :
96 0 : if (BIO_printf(bp, fmt, p) <= 0)
97 : goto err;
98 : return (1);
99 : err:
100 : return (0);
101 : }
102 :
103 0 : int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent)
104 : {
105 0 : return (asn1_parse2(bp, &pp, len, 0, 0, indent, 0));
106 : }
107 :
108 0 : int ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent,
109 : int dump)
110 : {
111 0 : return (asn1_parse2(bp, &pp, len, 0, 0, indent, dump));
112 : }
113 :
114 0 : static int asn1_parse2(BIO *bp, const unsigned char **pp, long length,
115 : int offset, int depth, int indent, int dump)
116 : {
117 : const unsigned char *p, *ep, *tot, *op, *opp;
118 : long len;
119 : int tag, xclass, ret = 0;
120 : int nl, hl, j, r;
121 0 : ASN1_OBJECT *o = NULL;
122 : ASN1_OCTET_STRING *os = NULL;
123 : /* ASN1_BMPSTRING *bmp=NULL; */
124 : int dump_indent;
125 :
126 : #if 0
127 : dump_indent = indent;
128 : #else
129 : dump_indent = 6; /* Because we know BIO_dump_indent() */
130 : #endif
131 0 : p = *pp;
132 0 : tot = p + length;
133 0 : op = p - 1;
134 0 : while ((p < tot) && (op < p)) {
135 : op = p;
136 0 : j = ASN1_get_object(&p, &len, &tag, &xclass, length);
137 : #ifdef LINT
138 : j = j;
139 : #endif
140 0 : if (j & 0x80) {
141 0 : if (BIO_write(bp, "Error in encoding\n", 18) <= 0)
142 : goto end;
143 : ret = 0;
144 : goto end;
145 : }
146 0 : hl = (p - op);
147 0 : length -= hl;
148 : /*
149 : * if j == 0x21 it is a constructed indefinite length object
150 : */
151 0 : if (BIO_printf(bp, "%5ld:", (long)offset + (long)(op - *pp))
152 : <= 0)
153 : goto end;
154 :
155 0 : if (j != (V_ASN1_CONSTRUCTED | 1)) {
156 0 : if (BIO_printf(bp, "d=%-2d hl=%ld l=%4ld ",
157 : depth, (long)hl, len) <= 0)
158 : goto end;
159 : } else {
160 0 : if (BIO_printf(bp, "d=%-2d hl=%ld l=inf ", depth, (long)hl) <= 0)
161 : goto end;
162 : }
163 0 : if (!asn1_print_info(bp, tag, xclass, j, (indent) ? depth : 0))
164 : goto end;
165 0 : if (j & V_ASN1_CONSTRUCTED) {
166 0 : ep = p + len;
167 0 : if (BIO_write(bp, "\n", 1) <= 0)
168 : goto end;
169 0 : if (len > length) {
170 0 : BIO_printf(bp, "length is greater than %ld\n", length);
171 : ret = 0;
172 0 : goto end;
173 : }
174 0 : if ((j == 0x21) && (len == 0)) {
175 : for (;;) {
176 0 : r = asn1_parse2(bp, &p, (long)(tot - p),
177 0 : offset + (p - *pp), depth + 1,
178 : indent, dump);
179 0 : if (r == 0) {
180 : ret = 0;
181 : goto end;
182 : }
183 0 : if ((r == 2) || (p >= tot))
184 : break;
185 : }
186 : } else
187 0 : while (p < ep) {
188 0 : r = asn1_parse2(bp, &p, (long)len,
189 0 : offset + (p - *pp), depth + 1,
190 : indent, dump);
191 0 : if (r == 0) {
192 : ret = 0;
193 : goto end;
194 : }
195 : }
196 0 : } else if (xclass != 0) {
197 0 : p += len;
198 0 : if (BIO_write(bp, "\n", 1) <= 0)
199 : goto end;
200 : } else {
201 : nl = 0;
202 0 : if ((tag == V_ASN1_PRINTABLESTRING) ||
203 0 : (tag == V_ASN1_T61STRING) ||
204 0 : (tag == V_ASN1_IA5STRING) ||
205 0 : (tag == V_ASN1_VISIBLESTRING) ||
206 0 : (tag == V_ASN1_NUMERICSTRING) ||
207 0 : (tag == V_ASN1_UTF8STRING) ||
208 0 : (tag == V_ASN1_UTCTIME) || (tag == V_ASN1_GENERALIZEDTIME)) {
209 0 : if (BIO_write(bp, ":", 1) <= 0)
210 : goto end;
211 0 : if ((len > 0) && BIO_write(bp, (const char *)p, (int)len)
212 0 : != (int)len)
213 : goto end;
214 0 : } else if (tag == V_ASN1_OBJECT) {
215 0 : opp = op;
216 0 : if (d2i_ASN1_OBJECT(&o, &opp, len + hl) != NULL) {
217 0 : if (BIO_write(bp, ":", 1) <= 0)
218 : goto end;
219 0 : i2a_ASN1_OBJECT(bp, o);
220 : } else {
221 0 : if (BIO_write(bp, ":BAD OBJECT", 11) <= 0)
222 : goto end;
223 : }
224 0 : } else if (tag == V_ASN1_BOOLEAN) {
225 : int ii;
226 :
227 0 : opp = op;
228 0 : ii = d2i_ASN1_BOOLEAN(NULL, &opp, len + hl);
229 0 : if (ii < 0) {
230 0 : if (BIO_write(bp, "Bad boolean\n", 12) <= 0)
231 : goto end;
232 : }
233 0 : BIO_printf(bp, ":%d", ii);
234 0 : } else if (tag == V_ASN1_BMPSTRING) {
235 : /* do the BMP thang */
236 0 : } else if (tag == V_ASN1_OCTET_STRING) {
237 : int i, printable = 1;
238 :
239 0 : opp = op;
240 0 : os = d2i_ASN1_OCTET_STRING(NULL, &opp, len + hl);
241 0 : if (os != NULL && os->length > 0) {
242 0 : opp = os->data;
243 : /*
244 : * testing whether the octet string is printable
245 : */
246 0 : for (i = 0; i < os->length; i++) {
247 0 : if (((opp[i] < ' ') &&
248 0 : (opp[i] != '\n') &&
249 0 : (opp[i] != '\r') &&
250 0 : (opp[i] != '\t')) || (opp[i] > '~')) {
251 : printable = 0;
252 : break;
253 : }
254 : }
255 0 : if (printable)
256 : /* printable string */
257 : {
258 0 : if (BIO_write(bp, ":", 1) <= 0)
259 : goto end;
260 0 : if (BIO_write(bp, (const char *)opp, os->length) <= 0)
261 : goto end;
262 0 : } else if (!dump)
263 : /*
264 : * not printable => print octet string as hex dump
265 : */
266 : {
267 0 : if (BIO_write(bp, "[HEX DUMP]:", 11) <= 0)
268 : goto end;
269 0 : for (i = 0; i < os->length; i++) {
270 0 : if (BIO_printf(bp, "%02X", opp[i]) <= 0)
271 : goto end;
272 : }
273 : } else
274 : /* print the normal dump */
275 : {
276 : if (!nl) {
277 0 : if (BIO_write(bp, "\n", 1) <= 0)
278 : goto end;
279 : }
280 0 : if (BIO_dump_indent(bp,
281 : (const char *)opp,
282 0 : ((dump == -1 || dump >
283 0 : os->
284 : length) ? os->length : dump),
285 : dump_indent) <= 0)
286 : goto end;
287 : nl = 1;
288 : }
289 : }
290 0 : if (os != NULL) {
291 0 : M_ASN1_OCTET_STRING_free(os);
292 : os = NULL;
293 : }
294 0 : } else if (tag == V_ASN1_INTEGER) {
295 : ASN1_INTEGER *bs;
296 : int i;
297 :
298 0 : opp = op;
299 0 : bs = d2i_ASN1_INTEGER(NULL, &opp, len + hl);
300 0 : if (bs != NULL) {
301 0 : if (BIO_write(bp, ":", 1) <= 0)
302 : goto end;
303 0 : if (bs->type == V_ASN1_NEG_INTEGER)
304 0 : if (BIO_write(bp, "-", 1) <= 0)
305 : goto end;
306 0 : for (i = 0; i < bs->length; i++) {
307 0 : if (BIO_printf(bp, "%02X", bs->data[i]) <= 0)
308 : goto end;
309 : }
310 0 : if (bs->length == 0) {
311 0 : if (BIO_write(bp, "00", 2) <= 0)
312 : goto end;
313 : }
314 : } else {
315 0 : if (BIO_write(bp, "BAD INTEGER", 11) <= 0)
316 : goto end;
317 : }
318 0 : M_ASN1_INTEGER_free(bs);
319 0 : } else if (tag == V_ASN1_ENUMERATED) {
320 : ASN1_ENUMERATED *bs;
321 : int i;
322 :
323 0 : opp = op;
324 0 : bs = d2i_ASN1_ENUMERATED(NULL, &opp, len + hl);
325 0 : if (bs != NULL) {
326 0 : if (BIO_write(bp, ":", 1) <= 0)
327 : goto end;
328 0 : if (bs->type == V_ASN1_NEG_ENUMERATED)
329 0 : if (BIO_write(bp, "-", 1) <= 0)
330 : goto end;
331 0 : for (i = 0; i < bs->length; i++) {
332 0 : if (BIO_printf(bp, "%02X", bs->data[i]) <= 0)
333 : goto end;
334 : }
335 0 : if (bs->length == 0) {
336 0 : if (BIO_write(bp, "00", 2) <= 0)
337 : goto end;
338 : }
339 : } else {
340 0 : if (BIO_write(bp, "BAD ENUMERATED", 14) <= 0)
341 : goto end;
342 : }
343 0 : M_ASN1_ENUMERATED_free(bs);
344 0 : } else if (len > 0 && dump) {
345 : if (!nl) {
346 0 : if (BIO_write(bp, "\n", 1) <= 0)
347 : goto end;
348 : }
349 0 : if (BIO_dump_indent(bp, (const char *)p,
350 0 : ((dump == -1 || dump > len) ? len : dump),
351 : dump_indent) <= 0)
352 : goto end;
353 : nl = 1;
354 : }
355 :
356 0 : if (!nl) {
357 0 : if (BIO_write(bp, "\n", 1) <= 0)
358 : goto end;
359 : }
360 0 : p += len;
361 0 : if ((tag == V_ASN1_EOC) && (xclass == 0)) {
362 : ret = 2; /* End of sequence */
363 : goto end;
364 : }
365 : }
366 0 : length -= len;
367 : }
368 : ret = 1;
369 : end:
370 0 : if (o != NULL)
371 0 : ASN1_OBJECT_free(o);
372 0 : if (os != NULL)
373 0 : M_ASN1_OCTET_STRING_free(os);
374 0 : *pp = p;
375 0 : return (ret);
376 : }
377 :
378 0 : const char *ASN1_tag2str(int tag)
379 : {
380 : static const char *const tag2str[] = {
381 : /* 0-4 */
382 : "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING",
383 : /* 5-9 */
384 : "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL",
385 : /* 10-13 */
386 : "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>",
387 : /* 15-17 */
388 : "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET",
389 : /* 18-20 */
390 : "NUMERICSTRING", "PRINTABLESTRING", "T61STRING",
391 : /* 21-24 */
392 : "VIDEOTEXSTRING", "IA5STRING", "UTCTIME", "GENERALIZEDTIME",
393 : /* 25-27 */
394 : "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING",
395 : /* 28-30 */
396 : "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING"
397 : };
398 :
399 0 : if ((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
400 0 : tag &= ~0x100;
401 :
402 0 : if (tag < 0 || tag > 30)
403 : return "(unknown)";
404 0 : return tag2str[tag];
405 : }
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