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Import LibreSSL v2.4.2 to vendor branch
[dragonfly.git] / crypto / libressl / crypto / asn1 / asn1_par.c
blob07935771c80ffad547e894fb9657a40b08fabcd5
1 /* $OpenBSD: asn1_par.c,v 1.24 2015/09/30 18:41:06 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 #include <stdio.h>
60
61 #include <openssl/asn1.h>
62 #include <openssl/buffer.h>
63 #include <openssl/objects.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
70 static int
71 asn1_print_info(BIO *bp, int tag, int xclass, int constructed,
72 int indent)
73 {
74 char str[128];
75 const char *p;
76
77 if (constructed & V_ASN1_CONSTRUCTED)
78 p="cons: ";
79 else
80 p="prim: ";
81 if (BIO_write(bp, p, 6) < 6)
82 goto err;
83 BIO_indent(bp, indent, 128);
84
85 p = str;
86 if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
87 snprintf(str, sizeof str, "priv [ %d ] ", tag);
88 else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
89 snprintf(str, sizeof str, "cont [ %d ]", tag);
90 else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
91 snprintf(str, sizeof str, "appl [ %d ]", tag);
92 else if (tag > 30)
93 snprintf(str, sizeof str, "<ASN1 %d>", tag);
94 else
95 p = ASN1_tag2str(tag);
96
97 if (BIO_printf(bp, "%-18s", p) <= 0)
98 goto err;
99 return (1);
100 err:
101 return (0);
102 }
103
104 int
105 ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent)
106 {
107 return (asn1_parse2(bp, &pp, len, 0, 0, indent, 0));
108 }
109
110 int
111 ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent, int dump)
112 {
113 return (asn1_parse2(bp, &pp, len, 0, 0, indent, dump));
114 }
115
116 static int
117 asn1_parse2(BIO *bp, const unsigned char **pp, long length, int offset,
118 int depth, int indent, int dump)
119 {
120 const unsigned char *p, *ep, *tot, *op, *opp;
121 long len;
122 int tag, xclass, ret = 0;
123 int nl, hl, j, r;
124 ASN1_OBJECT *o = NULL;
125 ASN1_OCTET_STRING *os = NULL;
126 /* ASN1_BMPSTRING *bmp=NULL;*/
127 int dump_indent;
128
129 dump_indent = 6; /* Because we know BIO_dump_indent() */
130 p = *pp;
131 tot = p + length;
132 op = p - 1;
133 while ((p < tot) && (op < p)) {
134 op = p;
135 j = ASN1_get_object(&p, &len, &tag, &xclass, length);
136
137 if (j & 0x80) {
138 if (BIO_write(bp, "Error in encoding\n", 18) <= 0)
139 goto end;
140 ret = 0;
141 goto end;
142 }
143 hl = (p - op);
144 length -= hl;
145 /* if j == 0x21 it is a constructed indefinite length object */
146 if (BIO_printf(bp, "%5ld:", (long)offset +
147 (long)(op - *pp)) <= 0)
148 goto end;
149
150 if (j != (V_ASN1_CONSTRUCTED | 1)) {
151 if (BIO_printf(bp, "d=%-2d hl=%ld l=%4ld ",
152 depth, (long)hl, len) <= 0)
153 goto end;
154 } else {
155 if (BIO_printf(bp, "d=%-2d hl=%ld l=inf ",
156 depth, (long)hl) <= 0)
157 goto end;
158 }
159 if (!asn1_print_info(bp, tag, xclass, j, (indent) ? depth : 0))
160 goto end;
161 if (j & V_ASN1_CONSTRUCTED) {
162 ep = p + len;
163 if (BIO_write(bp, "\n", 1) <= 0)
164 goto end;
165 if (len > length) {
166 BIO_printf(bp, "length is greater than %ld\n",
167 length);
168 ret = 0;
169 goto end;
170 }
171 if ((j == 0x21) && (len == 0)) {
172 for (;;) {
173 r = asn1_parse2(bp, &p, (long)(tot - p),
174 offset + (p - *pp), depth + 1,
175 indent, dump);
176 if (r == 0) {
177 ret = 0;
178 goto end;
179 }
180 if ((r == 2) || (p >= tot))
181 break;
182 }
183 } else
184 while (p < ep) {
185 r = asn1_parse2(bp, &p, (long)len,
186 offset + (p - *pp), depth + 1,
187 indent, dump);
188 if (r == 0) {
189 ret = 0;
190 goto end;
191 }
192 }
193 } else if (xclass != 0) {
194 p += len;
195 if (BIO_write(bp, "\n", 1) <= 0)
196 goto end;
197 } else {
198 nl = 0;
199 if ((tag == V_ASN1_PRINTABLESTRING) ||
200 (tag == V_ASN1_T61STRING) ||
201 (tag == V_ASN1_IA5STRING) ||
202 (tag == V_ASN1_VISIBLESTRING) ||
203 (tag == V_ASN1_NUMERICSTRING) ||
204 (tag == V_ASN1_UTF8STRING) ||
205 (tag == V_ASN1_UTCTIME) ||
206 (tag == V_ASN1_GENERALIZEDTIME)) {
207 if (BIO_write(bp, ":", 1) <= 0)
208 goto end;
209 if ((len > 0) &&
210 BIO_write(bp, (const char *)p, (int)len) !=
211 (int)len)
212 goto end;
213 } else if (tag == V_ASN1_OBJECT) {
214 opp = op;
215 if (d2i_ASN1_OBJECT(&o, &opp, len + hl) !=
216 NULL) {
217 if (BIO_write(bp, ":", 1) <= 0)
218 goto end;
219 i2a_ASN1_OBJECT(bp, o);
220 } else {
221 if (BIO_write(bp, ":BAD OBJECT",
222 11) <= 0)
223 goto end;
224 }
225 } else if (tag == V_ASN1_BOOLEAN) {
226 int ii;
227
228 opp = op;
229 ii = d2i_ASN1_BOOLEAN(NULL, &opp, len + hl);
230 if (ii < 0) {
231 if (BIO_write(bp, "Bad boolean\n",
232 12) <= 0)
233 goto end;
234 }
235 BIO_printf(bp, ":%d", ii);
236 } else if (tag == V_ASN1_BMPSTRING) {
237 /* do the BMP thang */
238 } else if (tag == V_ASN1_OCTET_STRING) {
239 int i, printable = 1;
240
241 opp = op;
242 os = d2i_ASN1_OCTET_STRING(NULL, &opp, len + hl);
243 if (os != NULL && os->length > 0) {
244 opp = os->data;
245 /* testing whether the octet string is
246 * printable */
247 for (i = 0; i < os->length; i++) {
248 if (((opp[i] < ' ') &&
249 (opp[i] != '\n') &&
250 (opp[i] != '\r') &&
251 (opp[i] != '\t')) ||
252 (opp[i] > '~')) {
253 printable = 0;
254 break;
255 }
256 }
257 if (printable) {
258 /* printable string */
259 if (BIO_write(bp, ":", 1) <= 0)
260 goto end;
261 if (BIO_write(bp, (const char *)opp,
262 os->length) <= 0)
263 goto end;
264 } else if (!dump) {
265 /* not printable => print octet string
266 * as hex dump */
267 if (BIO_write(bp, "[HEX DUMP]:", 11) <= 0)
268 goto end;
269 for (i = 0; i < os->length; i++) {
270 if (BIO_printf(bp,
271 "%02X", opp[i]) <= 0)
272 goto end;
273 }
274 } else {
275 /* print the normal dump */
276 if (!nl) {
277 if (BIO_write(bp, "\n", 1) <= 0)
278 goto end;
279 }
280 if (BIO_dump_indent(bp,
281 (const char *)opp,
282 ((dump == -1 || dump >
283 os->length) ? os->length : dump),
284 dump_indent) <= 0)
285 goto end;
286 nl = 1;
287 }
288 }
289 ASN1_OCTET_STRING_free(os);
290 os = NULL;
291 } else if (tag == V_ASN1_INTEGER) {
292 ASN1_INTEGER *bs;
293 int i;
294
295 opp = op;
296 bs = d2i_ASN1_INTEGER(NULL, &opp, len + hl);
297 if (bs != NULL) {
298 if (BIO_write(bp, ":", 1) <= 0)
299 goto end;
300 if (bs->type == V_ASN1_NEG_INTEGER)
301 if (BIO_write(bp, "-", 1) <= 0)
302 goto end;
303 for (i = 0; i < bs->length; i++) {
304 if (BIO_printf(bp, "%02X",
305 bs->data[i]) <= 0)
306 goto end;
307 }
308 if (bs->length == 0) {
309 if (BIO_write(bp, "00", 2) <= 0)
310 goto end;
311 }
312 } else {
313 if (BIO_write(bp, "BAD INTEGER", 11) <= 0)
314 goto end;
315 }
316 ASN1_INTEGER_free(bs);
317 } else if (tag == V_ASN1_ENUMERATED) {
318 ASN1_ENUMERATED *bs;
319 int i;
320
321 opp = op;
322 bs = d2i_ASN1_ENUMERATED(NULL, &opp, len + hl);
323 if (bs != NULL) {
324 if (BIO_write(bp, ":", 1) <= 0)
325 goto end;
326 if (bs->type == V_ASN1_NEG_ENUMERATED)
327 if (BIO_write(bp, "-", 1) <= 0)
328 goto end;
329 for (i = 0; i < bs->length; i++) {
330 if (BIO_printf(bp, "%02X",
331 bs->data[i]) <= 0)
332 goto end;
333 }
334 if (bs->length == 0) {
335 if (BIO_write(bp, "00", 2) <= 0)
336 goto end;
337 }
338 } else {
339 if (BIO_write(bp, "BAD ENUMERATED", 14) <= 0)
340 goto end;
341 }
342 ASN1_ENUMERATED_free(bs);
343 } else if (len > 0 && dump) {
344 if (!nl) {
345 if (BIO_write(bp, "\n", 1) <= 0)
346 goto end;
347 }
348 if (BIO_dump_indent(bp, (const char *)p,
349 ((dump == -1 || dump > len) ? len : dump),
350 dump_indent) <= 0)
351 goto end;
352 nl = 1;
353 }
354
355 if (!nl) {
356 if (BIO_write(bp, "\n", 1) <= 0)
357 goto end;
358 }
359 p += len;
360 if ((tag == V_ASN1_EOC) && (xclass == 0)) {
361 ret = 2; /* End of sequence */
362 goto end;
363 }
364 }
365 length -= len;
366 }
367 ret = 1;
368
369 end:
370 if (o != NULL)
371 ASN1_OBJECT_free(o);
372 ASN1_OCTET_STRING_free(os);
373 *pp = p;
374 return (ret);
375 }
376
377 const char *
378 ASN1_tag2str(int tag)
379 {
380 static const char * const tag2str[] = {
381 "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */
382 "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */
383 "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", /* 10-13 */
384 "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", /* 15-17 */
385 "NUMERICSTRING", "PRINTABLESTRING", "T61STRING", /* 18-20 */
386 "VIDEOTEXSTRING", "IA5STRING", "UTCTIME", "GENERALIZEDTIME", /* 21-24 */
387 "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", /* 25-27 */
388 "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING" /* 28-30 */
389 };
390
391 if ((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
392 tag &= ~0x100;
393
394 if (tag < 0 || tag > 30)
395 return "(unknown)";
396 return tag2str[tag];
397 }
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