1 /* tasn_dec.c */
2 /*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 * 2000.
5 */
6 /* ====================================================================
7 * Copyright (c) 2000-2005 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60 #include <stddef.h>
61 #include <string.h>
62 #include <openssl/asn1.h>
63 #include <openssl/asn1t.h>
64 #include <openssl/objects.h>
65 #include <openssl/buffer.h>
66 #include <openssl/err.h>
67
68 static int asn1_check_eoc(const unsigned char **in, long len);
69 static int asn1_find_end(const unsigned char **in, long len, char inf);
70
71 static int asn1_collect(BUF_MEM *buf, const unsigned char **in, long len,
72 char inf, int tag, int aclass, int depth);
73
74 static int collect_data(BUF_MEM *buf, const unsigned char **p, long plen);
75
76 static int asn1_check_tlen(long *olen, int *otag, unsigned char *oclass,
77 char *inf, char *cst,
78 const unsigned char **in, long len,
79 int exptag, int expclass, char opt, ASN1_TLC *ctx);
80
81 static int asn1_template_ex_d2i(ASN1_VALUE **pval,
82 const unsigned char **in, long len,
83 const ASN1_TEMPLATE *tt, char opt,
84 ASN1_TLC *ctx);
85 static int asn1_template_noexp_d2i(ASN1_VALUE **val,
86 const unsigned char **in, long len,
87 const ASN1_TEMPLATE *tt, char opt,
88 ASN1_TLC *ctx);
89 static int asn1_d2i_ex_primitive(ASN1_VALUE **pval,
90 const unsigned char **in, long len,
91 const ASN1_ITEM *it,
92 int tag, int aclass, char opt,
93 ASN1_TLC *ctx);
94
95 /* Table to convert tags to bit values, used for MSTRING type */
96 static const unsigned long tag2bit[32] = {
97 /* tags 0 - 3 */
98 0, 0, 0, B_ASN1_BIT_STRING,
99 /* tags 4- 7 */
100 B_ASN1_OCTET_STRING, 0, 0, B_ASN1_UNKNOWN,
101 /* tags 8-11 */
102 B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN,
103 /* tags 12-15 */
104 B_ASN1_UTF8STRING, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN,
105 /* tags 16-19 */
106 B_ASN1_SEQUENCE, 0, B_ASN1_NUMERICSTRING, B_ASN1_PRINTABLESTRING,
107 /* tags 20-22 */
108 B_ASN1_T61STRING, B_ASN1_VIDEOTEXSTRING, B_ASN1_IA5STRING,
109 /* tags 23-24 */
110 B_ASN1_UTCTIME, B_ASN1_GENERALIZEDTIME,
111 /* tags 25-27 */
112 B_ASN1_GRAPHICSTRING, B_ASN1_ISO64STRING, B_ASN1_GENERALSTRING,
113 /* tags 28-31 */
114 B_ASN1_UNIVERSALSTRING, B_ASN1_UNKNOWN, B_ASN1_BMPSTRING, B_ASN1_UNKNOWN,
115 };
116
ASN1_tag2bit(int tag)117 unsigned long ASN1_tag2bit(int tag)
118 {
119 if ((tag < 0) || (tag > 30))
120 return 0;
121 return tag2bit[tag];
122 }
123
124 /* Macro to initialize and invalidate the cache */
125
126 #define asn1_tlc_clear(c) if (c) (c)->valid = 0
127 /* Version to avoid compiler warning about 'c' always non-NULL */
128 #define asn1_tlc_clear_nc(c) (c)->valid = 0
129
130 /*
131 * Decode an ASN1 item, this currently behaves just like a standard 'd2i'
132 * function. 'in' points to a buffer to read the data from, in future we
133 * will have more advanced versions that can input data a piece at a time and
134 * this will simply be a special case.
135 */
136
ASN1_item_d2i(ASN1_VALUE ** pval,const unsigned char ** in,long len,const ASN1_ITEM * it)137 ASN1_VALUE *ASN1_item_d2i(ASN1_VALUE **pval,
138 const unsigned char **in, long len,
139 const ASN1_ITEM *it)
140 {
141 ASN1_TLC c;
142 ASN1_VALUE *ptmpval = NULL;
143 if (!pval)
144 pval = &ptmpval;
145 asn1_tlc_clear_nc(&c);
146 if (ASN1_item_ex_d2i(pval, in, len, it, -1, 0, 0, &c) > 0)
147 return *pval;
148 return NULL;
149 }
150
ASN1_template_d2i(ASN1_VALUE ** pval,const unsigned char ** in,long len,const ASN1_TEMPLATE * tt)151 int ASN1_template_d2i(ASN1_VALUE **pval,
152 const unsigned char **in, long len,
153 const ASN1_TEMPLATE *tt)
154 {
155 ASN1_TLC c;
156 asn1_tlc_clear_nc(&c);
157 return asn1_template_ex_d2i(pval, in, len, tt, 0, &c);
158 }
159
160 /*
161 * Decode an item, taking care of IMPLICIT tagging, if any. If 'opt' set and
162 * tag mismatch return -1 to handle OPTIONAL
163 */
164
ASN1_item_ex_d2i(ASN1_VALUE ** pval,const unsigned char ** in,long len,const ASN1_ITEM * it,int tag,int aclass,char opt,ASN1_TLC * ctx)165 int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
166 const ASN1_ITEM *it,
167 int tag, int aclass, char opt, ASN1_TLC *ctx)
168 {
169 const ASN1_TEMPLATE *tt, *errtt = NULL;
170 const ASN1_COMPAT_FUNCS *cf;
171 const ASN1_EXTERN_FUNCS *ef;
172 const ASN1_AUX *aux = it->funcs;
173 ASN1_aux_cb *asn1_cb;
174 const unsigned char *p = NULL, *q;
175 unsigned char *wp = NULL; /* BIG FAT WARNING! BREAKS CONST WHERE USED */
176 unsigned char imphack = 0, oclass;
177 char seq_eoc, seq_nolen, cst, isopt;
178 long tmplen;
179 int i;
180 int otag;
181 int ret = 0;
182 ASN1_VALUE **pchptr, *ptmpval;
183 int combine = aclass & ASN1_TFLG_COMBINE;
184 aclass &= ~ASN1_TFLG_COMBINE;
185 if (!pval)
186 return 0;
187 if (aux && aux->asn1_cb)
188 asn1_cb = aux->asn1_cb;
189 else
190 asn1_cb = 0;
191
192 switch (it->itype) {
193 case ASN1_ITYPE_PRIMITIVE:
194 if (it->templates) {
195 /*
196 * tagging or OPTIONAL is currently illegal on an item template
197 * because the flags can't get passed down. In practice this
198 * isn't a problem: we include the relevant flags from the item
199 * template in the template itself.
200 */
201 if ((tag != -1) || opt) {
202 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I,
203 ASN1_R_ILLEGAL_OPTIONS_ON_ITEM_TEMPLATE);
204 goto err;
205 }
206 return asn1_template_ex_d2i(pval, in, len,
207 it->templates, opt, ctx);
208 }
209 return asn1_d2i_ex_primitive(pval, in, len, it,
210 tag, aclass, opt, ctx);
211 break;
212
213 case ASN1_ITYPE_MSTRING:
214 p = *in;
215 /* Just read in tag and class */
216 ret = asn1_check_tlen(NULL, &otag, &oclass, NULL, NULL,
217 &p, len, -1, 0, 1, ctx);
218 if (!ret) {
219 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
220 goto err;
221 }
222
223 /* Must be UNIVERSAL class */
224 if (oclass != V_ASN1_UNIVERSAL) {
225 /* If OPTIONAL, assume this is OK */
226 if (opt)
227 return -1;
228 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_MSTRING_NOT_UNIVERSAL);
229 goto err;
230 }
231 /* Check tag matches bit map */
232 if (!(ASN1_tag2bit(otag) & it->utype)) {
233 /* If OPTIONAL, assume this is OK */
234 if (opt)
235 return -1;
236 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_MSTRING_WRONG_TAG);
237 goto err;
238 }
239 return asn1_d2i_ex_primitive(pval, in, len, it, otag, 0, 0, ctx);
240
241 case ASN1_ITYPE_EXTERN:
242 /* Use new style d2i */
243 ef = it->funcs;
244 return ef->asn1_ex_d2i(pval, in, len, it, tag, aclass, opt, ctx);
245
246 case ASN1_ITYPE_COMPAT:
247 /* we must resort to old style evil hackery */
248 cf = it->funcs;
249
250 /* If OPTIONAL see if it is there */
251 if (opt) {
252 int exptag;
253 p = *in;
254 if (tag == -1)
255 exptag = it->utype;
256 else
257 exptag = tag;
258 /*
259 * Don't care about anything other than presence of expected tag
260 */
261
262 ret = asn1_check_tlen(NULL, NULL, NULL, NULL, NULL,
263 &p, len, exptag, aclass, 1, ctx);
264 if (!ret) {
265 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
266 goto err;
267 }
268 if (ret == -1)
269 return -1;
270 }
271
272 /*
273 * This is the old style evil hack IMPLICIT handling: since the
274 * underlying code is expecting a tag and class other than the one
275 * present we change the buffer temporarily then change it back
276 * afterwards. This doesn't and never did work for tags > 30. Yes
277 * this is *horrible* but it is only needed for old style d2i which
278 * will hopefully not be around for much longer. FIXME: should copy
279 * the buffer then modify it so the input buffer can be const: we
280 * should *always* copy because the old style d2i might modify the
281 * buffer.
282 */
283
284 if (tag != -1) {
285 wp = *(unsigned char **)in;
286 imphack = *wp;
287 if (p == NULL) {
288 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
289 goto err;
290 }
291 *wp = (unsigned char)((*p & V_ASN1_CONSTRUCTED)
292 | it->utype);
293 }
294
295 ptmpval = cf->asn1_d2i(pval, in, len);
296
297 if (tag != -1)
298 *wp = imphack;
299
300 if (ptmpval)
301 return 1;
302
303 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
304 goto err;
305
306 case ASN1_ITYPE_CHOICE:
307 if (asn1_cb && !asn1_cb(ASN1_OP_D2I_PRE, pval, it, NULL))
308 goto auxerr;
309 if (*pval) {
310 /* Free up and zero CHOICE value if initialised */
311 i = asn1_get_choice_selector(pval, it);
312 if ((i >= 0) && (i < it->tcount)) {
313 tt = it->templates + i;
314 pchptr = asn1_get_field_ptr(pval, tt);
315 ASN1_template_free(pchptr, tt);
316 asn1_set_choice_selector(pval, -1, it);
317 }
318 } else if (!ASN1_item_ex_new(pval, it)) {
319 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
320 goto err;
321 }
322 /* CHOICE type, try each possibility in turn */
323 p = *in;
324 for (i = 0, tt = it->templates; i < it->tcount; i++, tt++) {
325 pchptr = asn1_get_field_ptr(pval, tt);
326 /*
327 * We mark field as OPTIONAL so its absence can be recognised.
328 */
329 ret = asn1_template_ex_d2i(pchptr, &p, len, tt, 1, ctx);
330 /* If field not present, try the next one */
331 if (ret == -1)
332 continue;
333 /* If positive return, read OK, break loop */
334 if (ret > 0)
335 break;
336 /* Otherwise must be an ASN1 parsing error */
337 errtt = tt;
338 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
339 goto err;
340 }
341
342 /* Did we fall off the end without reading anything? */
343 if (i == it->tcount) {
344 /* If OPTIONAL, this is OK */
345 if (opt) {
346 /* Free and zero it */
347 ASN1_item_ex_free(pval, it);
348 return -1;
349 }
350 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_NO_MATCHING_CHOICE_TYPE);
351 goto err;
352 }
353
354 asn1_set_choice_selector(pval, i, it);
355 if (asn1_cb && !asn1_cb(ASN1_OP_D2I_POST, pval, it, NULL))
356 goto auxerr;
357 *in = p;
358 return 1;
359
360 case ASN1_ITYPE_NDEF_SEQUENCE:
361 case ASN1_ITYPE_SEQUENCE:
362 p = *in;
363 tmplen = len;
364
365 /* If no IMPLICIT tagging set to SEQUENCE, UNIVERSAL */
366 if (tag == -1) {
367 tag = V_ASN1_SEQUENCE;
368 aclass = V_ASN1_UNIVERSAL;
369 }
370 /* Get SEQUENCE length and update len, p */
371 ret = asn1_check_tlen(&len, NULL, NULL, &seq_eoc, &cst,
372 &p, len, tag, aclass, opt, ctx);
373 if (!ret) {
374 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
375 goto err;
376 } else if (ret == -1)
377 return -1;
378 if (aux && (aux->flags & ASN1_AFLG_BROKEN)) {
379 len = tmplen - (p - *in);
380 seq_nolen = 1;
381 }
382 /* If indefinite we don't do a length check */
383 else
384 seq_nolen = seq_eoc;
385 if (!cst) {
386 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_SEQUENCE_NOT_CONSTRUCTED);
387 goto err;
388 }
389
390 if (!*pval && !ASN1_item_ex_new(pval, it)) {
391 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
392 goto err;
393 }
394
395 if (asn1_cb && !asn1_cb(ASN1_OP_D2I_PRE, pval, it, NULL))
396 goto auxerr;
397
398 /* Free up and zero any ADB found */
399 for (i = 0, tt = it->templates; i < it->tcount; i++, tt++) {
400 if (tt->flags & ASN1_TFLG_ADB_MASK) {
401 const ASN1_TEMPLATE *seqtt;
402 ASN1_VALUE **pseqval;
403 seqtt = asn1_do_adb(pval, tt, 0);
404 if (seqtt == NULL)
405 continue;
406 pseqval = asn1_get_field_ptr(pval, seqtt);
407 ASN1_template_free(pseqval, seqtt);
408 }
409 }
410
411 /* Get each field entry */
412 for (i = 0, tt = it->templates; i < it->tcount; i++, tt++) {
413 const ASN1_TEMPLATE *seqtt;
414 ASN1_VALUE **pseqval;
415 seqtt = asn1_do_adb(pval, tt, 1);
416 if (seqtt == NULL)
417 goto err;
418 pseqval = asn1_get_field_ptr(pval, seqtt);
419 /* Have we ran out of data? */
420 if (!len)
421 break;
422 q = p;
423 if (asn1_check_eoc(&p, len)) {
424 if (!seq_eoc) {
425 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_UNEXPECTED_EOC);
426 goto err;
427 }
428 len -= p - q;
429 seq_eoc = 0;
430 q = p;
431 break;
432 }
433 /*
434 * This determines the OPTIONAL flag value. The field cannot be
435 * omitted if it is the last of a SEQUENCE and there is still
436 * data to be read. This isn't strictly necessary but it
437 * increases efficiency in some cases.
438 */
439 if (i == (it->tcount - 1))
440 isopt = 0;
441 else
442 isopt = (char)(seqtt->flags & ASN1_TFLG_OPTIONAL);
443 /*
444 * attempt to read in field, allowing each to be OPTIONAL
445 */
446
447 ret = asn1_template_ex_d2i(pseqval, &p, len, seqtt, isopt, ctx);
448 if (!ret) {
449 errtt = seqtt;
450 goto err;
451 } else if (ret == -1) {
452 /*
453 * OPTIONAL component absent. Free and zero the field.
454 */
455 ASN1_template_free(pseqval, seqtt);
456 continue;
457 }
458 /* Update length */
459 len -= p - q;
460 }
461
462 /* Check for EOC if expecting one */
463 if (seq_eoc && !asn1_check_eoc(&p, len)) {
464 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_MISSING_EOC);
465 goto err;
466 }
467 /* Check all data read */
468 if (!seq_nolen && len) {
469 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_SEQUENCE_LENGTH_MISMATCH);
470 goto err;
471 }
472
473 /*
474 * If we get here we've got no more data in the SEQUENCE, however we
475 * may not have read all fields so check all remaining are OPTIONAL
476 * and clear any that are.
477 */
478 for (; i < it->tcount; tt++, i++) {
479 const ASN1_TEMPLATE *seqtt;
480 seqtt = asn1_do_adb(pval, tt, 1);
481 if (seqtt == NULL)
482 goto err;
483 if (seqtt->flags & ASN1_TFLG_OPTIONAL) {
484 ASN1_VALUE **pseqval;
485 pseqval = asn1_get_field_ptr(pval, seqtt);
486 ASN1_template_free(pseqval, seqtt);
487 } else {
488 errtt = seqtt;
489 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_FIELD_MISSING);
490 goto err;
491 }
492 }
493 /* Save encoding */
494 if (!asn1_enc_save(pval, *in, p - *in, it))
495 goto auxerr;
496 if (asn1_cb && !asn1_cb(ASN1_OP_D2I_POST, pval, it, NULL))
497 goto auxerr;
498 *in = p;
499 return 1;
500
501 default:
502 return 0;
503 }
504 auxerr:
505 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_AUX_ERROR);
506 err:
507 if (combine == 0)
508 ASN1_item_ex_free(pval, it);
509 if (errtt)
510 ERR_add_error_data(4, "Field=", errtt->field_name,
511 ", Type=", it->sname);
512 else
513 ERR_add_error_data(2, "Type=", it->sname);
514 return 0;
515 }
516
517 /*
518 * Templates are handled with two separate functions. One handles any
519 * EXPLICIT tag and the other handles the rest.
520 */
521
asn1_template_ex_d2i(ASN1_VALUE ** val,const unsigned char ** in,long inlen,const ASN1_TEMPLATE * tt,char opt,ASN1_TLC * ctx)522 static int asn1_template_ex_d2i(ASN1_VALUE **val,
523 const unsigned char **in, long inlen,
524 const ASN1_TEMPLATE *tt, char opt,
525 ASN1_TLC *ctx)
526 {
527 int flags, aclass;
528 int ret;
529 long len;
530 const unsigned char *p, *q;
531 char exp_eoc;
532 if (!val)
533 return 0;
534 flags = tt->flags;
535 aclass = flags & ASN1_TFLG_TAG_CLASS;
536
537 p = *in;
538
539 /* Check if EXPLICIT tag expected */
540 if (flags & ASN1_TFLG_EXPTAG) {
541 char cst;
542 /*
543 * Need to work out amount of data available to the inner content and
544 * where it starts: so read in EXPLICIT header to get the info.
545 */
546 ret = asn1_check_tlen(&len, NULL, NULL, &exp_eoc, &cst,
547 &p, inlen, tt->tag, aclass, opt, ctx);
548 q = p;
549 if (!ret) {
550 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
551 return 0;
552 } else if (ret == -1)
553 return -1;
554 if (!cst) {
555 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I,
556 ASN1_R_EXPLICIT_TAG_NOT_CONSTRUCTED);
557 return 0;
558 }
559 /* We've found the field so it can't be OPTIONAL now */
560 ret = asn1_template_noexp_d2i(val, &p, len, tt, 0, ctx);
561 if (!ret) {
562 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
563 return 0;
564 }
565 /* We read the field in OK so update length */
566 len -= p - q;
567 if (exp_eoc) {
568 /* If NDEF we must have an EOC here */
569 if (!asn1_check_eoc(&p, len)) {
570 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I, ASN1_R_MISSING_EOC);
571 goto err;
572 }
573 } else {
574 /*
575 * Otherwise we must hit the EXPLICIT tag end or its an error
576 */
577 if (len) {
578 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I,
579 ASN1_R_EXPLICIT_LENGTH_MISMATCH);
580 goto err;
581 }
582 }
583 } else
584 return asn1_template_noexp_d2i(val, in, inlen, tt, opt, ctx);
585
586 *in = p;
587 return 1;
588
589 err:
590 ASN1_template_free(val, tt);
591 return 0;
592 }
593
asn1_template_noexp_d2i(ASN1_VALUE ** val,const unsigned char ** in,long len,const ASN1_TEMPLATE * tt,char opt,ASN1_TLC * ctx)594 static int asn1_template_noexp_d2i(ASN1_VALUE **val,
595 const unsigned char **in, long len,
596 const ASN1_TEMPLATE *tt, char opt,
597 ASN1_TLC *ctx)
598 {
599 int flags, aclass;
600 int ret;
601 const unsigned char *p, *q;
602 if (!val)
603 return 0;
604 flags = tt->flags;
605 aclass = flags & ASN1_TFLG_TAG_CLASS;
606
607 p = *in;
608 q = p;
609
610 if (flags & ASN1_TFLG_SK_MASK) {
611 /* SET OF, SEQUENCE OF */
612 int sktag, skaclass;
613 char sk_eoc;
614 /* First work out expected inner tag value */
615 if (flags & ASN1_TFLG_IMPTAG) {
616 sktag = tt->tag;
617 skaclass = aclass;
618 } else {
619 skaclass = V_ASN1_UNIVERSAL;
620 if (flags & ASN1_TFLG_SET_OF)
621 sktag = V_ASN1_SET;
622 else
623 sktag = V_ASN1_SEQUENCE;
624 }
625 /* Get the tag */
626 ret = asn1_check_tlen(&len, NULL, NULL, &sk_eoc, NULL,
627 &p, len, sktag, skaclass, opt, ctx);
628 if (!ret) {
629 ASN1err(ASN1_F_ASN1_TEMPLATE_NOEXP_D2I, ERR_R_NESTED_ASN1_ERROR);
630 return 0;
631 } else if (ret == -1)
632 return -1;
633 if (!*val)
634 *val = (ASN1_VALUE *)sk_new_null();
635 else {
636 /*
637 * We've got a valid STACK: free up any items present
638 */
639 STACK_OF(ASN1_VALUE) *sktmp = (STACK_OF(ASN1_VALUE) *)*val;
640 ASN1_VALUE *vtmp;
641 while (sk_ASN1_VALUE_num(sktmp) > 0) {
642 vtmp = sk_ASN1_VALUE_pop(sktmp);
643 ASN1_item_ex_free(&vtmp, ASN1_ITEM_ptr(tt->item));
644 }
645 }
646
647 if (!*val) {
648 ASN1err(ASN1_F_ASN1_TEMPLATE_NOEXP_D2I, ERR_R_MALLOC_FAILURE);
649 goto err;
650 }
651
652 /* Read as many items as we can */
653 while (len > 0) {
654 ASN1_VALUE *skfield;
655 q = p;
656 /* See if EOC found */
657 if (asn1_check_eoc(&p, len)) {
658 if (!sk_eoc) {
659 ASN1err(ASN1_F_ASN1_TEMPLATE_NOEXP_D2I,
660 ASN1_R_UNEXPECTED_EOC);
661 goto err;
662 }
663 len -= p - q;
664 sk_eoc = 0;
665 break;
666 }
667 skfield = NULL;
668 if (!ASN1_item_ex_d2i(&skfield, &p, len,
669 ASN1_ITEM_ptr(tt->item), -1, 0, 0, ctx)) {
670 ASN1err(ASN1_F_ASN1_TEMPLATE_NOEXP_D2I,
671 ERR_R_NESTED_ASN1_ERROR);
672 goto err;
673 }
674 len -= p - q;
675 if (!sk_ASN1_VALUE_push((STACK_OF(ASN1_VALUE) *)*val, skfield)) {
676 ASN1err(ASN1_F_ASN1_TEMPLATE_NOEXP_D2I, ERR_R_MALLOC_FAILURE);
677 goto err;
678 }
679 }
680 if (sk_eoc) {
681 ASN1err(ASN1_F_ASN1_TEMPLATE_NOEXP_D2I, ASN1_R_MISSING_EOC);
682 goto err;
683 }
684 } else if (flags & ASN1_TFLG_IMPTAG) {
685 /* IMPLICIT tagging */
686 ret = ASN1_item_ex_d2i(val, &p, len,
687 ASN1_ITEM_ptr(tt->item), tt->tag, aclass, opt,
688 ctx);
689 if (!ret) {
690 ASN1err(ASN1_F_ASN1_TEMPLATE_NOEXP_D2I, ERR_R_NESTED_ASN1_ERROR);
691 goto err;
692 } else if (ret == -1)
693 return -1;
694 } else {
695 /* Nothing special */
696 ret = ASN1_item_ex_d2i(val, &p, len, ASN1_ITEM_ptr(tt->item),
697 -1, tt->flags & ASN1_TFLG_COMBINE, opt, ctx);
698 if (!ret) {
699 ASN1err(ASN1_F_ASN1_TEMPLATE_NOEXP_D2I, ERR_R_NESTED_ASN1_ERROR);
700 goto err;
701 } else if (ret == -1)
702 return -1;
703 }
704
705 *in = p;
706 return 1;
707
708 err:
709 ASN1_template_free(val, tt);
710 return 0;
711 }
712
asn1_d2i_ex_primitive(ASN1_VALUE ** pval,const unsigned char ** in,long inlen,const ASN1_ITEM * it,int tag,int aclass,char opt,ASN1_TLC * ctx)713 static int asn1_d2i_ex_primitive(ASN1_VALUE **pval,
714 const unsigned char **in, long inlen,
715 const ASN1_ITEM *it,
716 int tag, int aclass, char opt, ASN1_TLC *ctx)
717 {
718 int ret = 0, utype;
719 long plen;
720 char cst, inf, free_cont = 0;
721 const unsigned char *p;
722 BUF_MEM buf = { 0, NULL, 0 };
723 const unsigned char *cont = NULL;
724 long len;
725 if (!pval) {
726 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ASN1_R_ILLEGAL_NULL);
727 return 0; /* Should never happen */
728 }
729
730 if (it->itype == ASN1_ITYPE_MSTRING) {
731 utype = tag;
732 tag = -1;
733 } else
734 utype = it->utype;
735
736 if (utype == V_ASN1_ANY) {
737 /* If type is ANY need to figure out type from tag */
738 unsigned char oclass;
739 if (tag >= 0) {
740 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ASN1_R_ILLEGAL_TAGGED_ANY);
741 return 0;
742 }
743 if (opt) {
744 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE,
745 ASN1_R_ILLEGAL_OPTIONAL_ANY);
746 return 0;
747 }
748 p = *in;
749 ret = asn1_check_tlen(NULL, &utype, &oclass, NULL, NULL,
750 &p, inlen, -1, 0, 0, ctx);
751 if (!ret) {
752 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ERR_R_NESTED_ASN1_ERROR);
753 return 0;
754 }
755 if (oclass != V_ASN1_UNIVERSAL)
756 utype = V_ASN1_OTHER;
757 }
758 if (tag == -1) {
759 tag = utype;
760 aclass = V_ASN1_UNIVERSAL;
761 }
762 p = *in;
763 /* Check header */
764 ret = asn1_check_tlen(&plen, NULL, NULL, &inf, &cst,
765 &p, inlen, tag, aclass, opt, ctx);
766 if (!ret) {
767 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ERR_R_NESTED_ASN1_ERROR);
768 return 0;
769 } else if (ret == -1)
770 return -1;
771 ret = 0;
772 /* SEQUENCE, SET and "OTHER" are left in encoded form */
773 if ((utype == V_ASN1_SEQUENCE)
774 || (utype == V_ASN1_SET) || (utype == V_ASN1_OTHER)) {
775 /*
776 * Clear context cache for type OTHER because the auto clear when we
777 * have a exact match wont work
778 */
779 if (utype == V_ASN1_OTHER) {
780 asn1_tlc_clear(ctx);
781 }
782 /* SEQUENCE and SET must be constructed */
783 else if (!cst) {
784 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE,
785 ASN1_R_TYPE_NOT_CONSTRUCTED);
786 return 0;
787 }
788
789 cont = *in;
790 /* If indefinite length constructed find the real end */
791 if (inf) {
792 if (!asn1_find_end(&p, plen, inf))
793 goto err;
794 len = p - cont;
795 } else {
796 len = p - cont + plen;
797 p += plen;
798 }
799 } else if (cst) {
800 if (utype == V_ASN1_NULL || utype == V_ASN1_BOOLEAN
801 || utype == V_ASN1_OBJECT || utype == V_ASN1_INTEGER
802 || utype == V_ASN1_ENUMERATED) {
803 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ASN1_R_TYPE_NOT_PRIMITIVE);
804 return 0;
805 }
806
807 /* Free any returned 'buf' content */
808 free_cont = 1;
809 /*
810 * Should really check the internal tags are correct but some things
811 * may get this wrong. The relevant specs say that constructed string
812 * types should be OCTET STRINGs internally irrespective of the type.
813 * So instead just check for UNIVERSAL class and ignore the tag.
814 */
815 if (!asn1_collect(&buf, &p, plen, inf, -1, V_ASN1_UNIVERSAL, 0)) {
816 goto err;
817 }
818 len = buf.length;
819 /* Append a final null to string */
820 if (!BUF_MEM_grow_clean(&buf, len + 1)) {
821 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ERR_R_MALLOC_FAILURE);
822 goto err;
823 }
824 buf.data[len] = 0;
825 cont = (const unsigned char *)buf.data;
826 } else {
827 cont = p;
828 len = plen;
829 p += plen;
830 }
831
832 /* We now have content length and type: translate into a structure */
833 /* asn1_ex_c2i may reuse allocated buffer, and so sets free_cont to 0 */
834 if (!asn1_ex_c2i(pval, cont, len, utype, &free_cont, it))
835 goto err;
836
837 *in = p;
838 ret = 1;
839 err:
840 if (free_cont && buf.data)
841 OPENSSL_free(buf.data);
842 return ret;
843 }
844
845 /* Translate ASN1 content octets into a structure */
846
asn1_ex_c2i(ASN1_VALUE ** pval,const unsigned char * cont,int len,int utype,char * free_cont,const ASN1_ITEM * it)847 int asn1_ex_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
848 int utype, char *free_cont, const ASN1_ITEM *it)
849 {
850 ASN1_VALUE **opval = NULL;
851 ASN1_STRING *stmp;
852 ASN1_TYPE *typ = NULL;
853 int ret = 0;
854 const ASN1_PRIMITIVE_FUNCS *pf;
855 ASN1_INTEGER **tint;
856 pf = it->funcs;
857
858 if (pf && pf->prim_c2i)
859 return pf->prim_c2i(pval, cont, len, utype, free_cont, it);
860 /* If ANY type clear type and set pointer to internal value */
861 if (it->utype == V_ASN1_ANY) {
862 if (!*pval) {
863 typ = ASN1_TYPE_new();
864 if (typ == NULL)
865 goto err;
866 *pval = (ASN1_VALUE *)typ;
867 } else
868 typ = (ASN1_TYPE *)*pval;
869
870 if (utype != typ->type)
871 ASN1_TYPE_set(typ, utype, NULL);
872 opval = pval;
873 pval = &typ->value.asn1_value;
874 }
875 switch (utype) {
876 case V_ASN1_OBJECT:
877 if (!c2i_ASN1_OBJECT((ASN1_OBJECT **)pval, &cont, len))
878 goto err;
879 break;
880
881 case V_ASN1_NULL:
882 if (len) {
883 ASN1err(ASN1_F_ASN1_EX_C2I, ASN1_R_NULL_IS_WRONG_LENGTH);
884 goto err;
885 }
886 *pval = (ASN1_VALUE *)1;
887 break;
888
889 case V_ASN1_BOOLEAN:
890 if (len != 1) {
891 ASN1err(ASN1_F_ASN1_EX_C2I, ASN1_R_BOOLEAN_IS_WRONG_LENGTH);
892 goto err;
893 } else {
894 ASN1_BOOLEAN *tbool;
895 tbool = (ASN1_BOOLEAN *)pval;
896 *tbool = *cont;
897 }
898 break;
899
900 case V_ASN1_BIT_STRING:
901 if (!c2i_ASN1_BIT_STRING((ASN1_BIT_STRING **)pval, &cont, len))
902 goto err;
903 break;
904
905 case V_ASN1_INTEGER:
906 case V_ASN1_ENUMERATED:
907 tint = (ASN1_INTEGER **)pval;
908 if (!c2i_ASN1_INTEGER(tint, &cont, len))
909 goto err;
910 /* Fixup type to match the expected form */
911 (*tint)->type = utype | ((*tint)->type & V_ASN1_NEG);
912 break;
913
914 case V_ASN1_OCTET_STRING:
915 case V_ASN1_NUMERICSTRING:
916 case V_ASN1_PRINTABLESTRING:
917 case V_ASN1_T61STRING:
918 case V_ASN1_VIDEOTEXSTRING:
919 case V_ASN1_IA5STRING:
920 case V_ASN1_UTCTIME:
921 case V_ASN1_GENERALIZEDTIME:
922 case V_ASN1_GRAPHICSTRING:
923 case V_ASN1_VISIBLESTRING:
924 case V_ASN1_GENERALSTRING:
925 case V_ASN1_UNIVERSALSTRING:
926 case V_ASN1_BMPSTRING:
927 case V_ASN1_UTF8STRING:
928 case V_ASN1_OTHER:
929 case V_ASN1_SET:
930 case V_ASN1_SEQUENCE:
931 default:
932 if (utype == V_ASN1_BMPSTRING && (len & 1)) {
933 ASN1err(ASN1_F_ASN1_EX_C2I, ASN1_R_BMPSTRING_IS_WRONG_LENGTH);
934 goto err;
935 }
936 if (utype == V_ASN1_UNIVERSALSTRING && (len & 3)) {
937 ASN1err(ASN1_F_ASN1_EX_C2I,
938 ASN1_R_UNIVERSALSTRING_IS_WRONG_LENGTH);
939 goto err;
940 }
941 /* All based on ASN1_STRING and handled the same */
942 if (!*pval) {
943 stmp = ASN1_STRING_type_new(utype);
944 if (!stmp) {
945 ASN1err(ASN1_F_ASN1_EX_C2I, ERR_R_MALLOC_FAILURE);
946 goto err;
947 }
948 *pval = (ASN1_VALUE *)stmp;
949 } else {
950 stmp = (ASN1_STRING *)*pval;
951 stmp->type = utype;
952 }
953 /* If we've already allocated a buffer use it */
954 if (*free_cont) {
955 if (stmp->data)
956 OPENSSL_free(stmp->data);
957 stmp->data = (unsigned char *)cont; /* UGLY CAST! RL */
958 stmp->length = len;
959 *free_cont = 0;
960 } else {
961 if (!ASN1_STRING_set(stmp, cont, len)) {
962 ASN1err(ASN1_F_ASN1_EX_C2I, ERR_R_MALLOC_FAILURE);
963 ASN1_STRING_free(stmp);
964 *pval = NULL;
965 goto err;
966 }
967 }
968 break;
969 }
970 /* If ASN1_ANY and NULL type fix up value */
971 if (typ && (utype == V_ASN1_NULL))
972 typ->value.ptr = NULL;
973
974 ret = 1;
975 err:
976 if (!ret) {
977 ASN1_TYPE_free(typ);
978 if (opval)
979 *opval = NULL;
980 }
981 return ret;
982 }
983
984 /*
985 * This function finds the end of an ASN1 structure when passed its maximum
986 * length, whether it is indefinite length and a pointer to the content. This
987 * is more efficient than calling asn1_collect because it does not recurse on
988 * each indefinite length header.
989 */
990
asn1_find_end(const unsigned char ** in,long len,char inf)991 static int asn1_find_end(const unsigned char **in, long len, char inf)
992 {
993 int expected_eoc;
994 long plen;
995 const unsigned char *p = *in, *q;
996 /* If not indefinite length constructed just add length */
997 if (inf == 0) {
998 *in += len;
999 return 1;
1000 }
1001 expected_eoc = 1;
1002 /*
1003 * Indefinite length constructed form. Find the end when enough EOCs are
1004 * found. If more indefinite length constructed headers are encountered
1005 * increment the expected eoc count otherwise just skip to the end of the
1006 * data.
1007 */
1008 while (len > 0) {
1009 if (asn1_check_eoc(&p, len)) {
1010 expected_eoc--;
1011 if (expected_eoc == 0)
1012 break;
1013 len -= 2;
1014 continue;
1015 }
1016 q = p;
1017 /* Just read in a header: only care about the length */
1018 if (!asn1_check_tlen(&plen, NULL, NULL, &inf, NULL, &p, len,
1019 -1, 0, 0, NULL)) {
1020 ASN1err(ASN1_F_ASN1_FIND_END, ERR_R_NESTED_ASN1_ERROR);
1021 return 0;
1022 }
1023 if (inf)
1024 expected_eoc++;
1025 else
1026 p += plen;
1027 len -= p - q;
1028 }
1029 if (expected_eoc) {
1030 ASN1err(ASN1_F_ASN1_FIND_END, ASN1_R_MISSING_EOC);
1031 return 0;
1032 }
1033 *in = p;
1034 return 1;
1035 }
1036
1037 /*
1038 * This function collects the asn1 data from a constructred string type into
1039 * a buffer. The values of 'in' and 'len' should refer to the contents of the
1040 * constructed type and 'inf' should be set if it is indefinite length.
1041 */
1042
1043 #ifndef ASN1_MAX_STRING_NEST
1044 /*
1045 * This determines how many levels of recursion are permitted in ASN1 string
1046 * types. If it is not limited stack overflows can occur. If set to zero no
1047 * recursion is allowed at all. Although zero should be adequate examples
1048 * exist that require a value of 1. So 5 should be more than enough.
1049 */
1050 # define ASN1_MAX_STRING_NEST 5
1051 #endif
1052
asn1_collect(BUF_MEM * buf,const unsigned char ** in,long len,char inf,int tag,int aclass,int depth)1053 static int asn1_collect(BUF_MEM *buf, const unsigned char **in, long len,
1054 char inf, int tag, int aclass, int depth)
1055 {
1056 const unsigned char *p, *q;
1057 long plen;
1058 char cst, ininf;
1059 p = *in;
1060 inf &= 1;
1061 /*
1062 * If no buffer and not indefinite length constructed just pass over the
1063 * encoded data
1064 */
1065 if (!buf && !inf) {
1066 *in += len;
1067 return 1;
1068 }
1069 while (len > 0) {
1070 q = p;
1071 /* Check for EOC */
1072 if (asn1_check_eoc(&p, len)) {
1073 /*
1074 * EOC is illegal outside indefinite length constructed form
1075 */
1076 if (!inf) {
1077 ASN1err(ASN1_F_ASN1_COLLECT, ASN1_R_UNEXPECTED_EOC);
1078 return 0;
1079 }
1080 inf = 0;
1081 break;
1082 }
1083
1084 if (!asn1_check_tlen(&plen, NULL, NULL, &ininf, &cst, &p,
1085 len, tag, aclass, 0, NULL)) {
1086 ASN1err(ASN1_F_ASN1_COLLECT, ERR_R_NESTED_ASN1_ERROR);
1087 return 0;
1088 }
1089
1090 /* If indefinite length constructed update max length */
1091 if (cst) {
1092 if (depth >= ASN1_MAX_STRING_NEST) {
1093 ASN1err(ASN1_F_ASN1_COLLECT, ASN1_R_NESTED_ASN1_STRING);
1094 return 0;
1095 }
1096 if (!asn1_collect(buf, &p, plen, ininf, tag, aclass, depth + 1))
1097 return 0;
1098 } else if (plen && !collect_data(buf, &p, plen))
1099 return 0;
1100 len -= p - q;
1101 }
1102 if (inf) {
1103 ASN1err(ASN1_F_ASN1_COLLECT, ASN1_R_MISSING_EOC);
1104 return 0;
1105 }
1106 *in = p;
1107 return 1;
1108 }
1109
collect_data(BUF_MEM * buf,const unsigned char ** p,long plen)1110 static int collect_data(BUF_MEM *buf, const unsigned char **p, long plen)
1111 {
1112 int len;
1113 if (buf) {
1114 len = buf->length;
1115 if (!BUF_MEM_grow_clean(buf, len + plen)) {
1116 ASN1err(ASN1_F_COLLECT_DATA, ERR_R_MALLOC_FAILURE);
1117 return 0;
1118 }
1119 memcpy(buf->data + len, *p, plen);
1120 }
1121 *p += plen;
1122 return 1;
1123 }
1124
1125 /* Check for ASN1 EOC and swallow it if found */
1126
asn1_check_eoc(const unsigned char ** in,long len)1127 static int asn1_check_eoc(const unsigned char **in, long len)
1128 {
1129 const unsigned char *p;
1130 if (len < 2)
1131 return 0;
1132 p = *in;
1133 if (!p[0] && !p[1]) {
1134 *in += 2;
1135 return 1;
1136 }
1137 return 0;
1138 }
1139
1140 /*
1141 * Check an ASN1 tag and length: a bit like ASN1_get_object but it sets the
1142 * length for indefinite length constructed form, we don't know the exact
1143 * length but we can set an upper bound to the amount of data available minus
1144 * the header length just read.
1145 */
1146
asn1_check_tlen(long * olen,int * otag,unsigned char * oclass,char * inf,char * cst,const unsigned char ** in,long len,int exptag,int expclass,char opt,ASN1_TLC * ctx)1147 static int asn1_check_tlen(long *olen, int *otag, unsigned char *oclass,
1148 char *inf, char *cst,
1149 const unsigned char **in, long len,
1150 int exptag, int expclass, char opt, ASN1_TLC *ctx)
1151 {
1152 int i;
1153 int ptag, pclass;
1154 long plen;
1155 const unsigned char *p, *q;
1156 p = *in;
1157 q = p;
1158
1159 if (ctx && ctx->valid) {
1160 i = ctx->ret;
1161 plen = ctx->plen;
1162 pclass = ctx->pclass;
1163 ptag = ctx->ptag;
1164 p += ctx->hdrlen;
1165 } else {
1166 i = ASN1_get_object(&p, &plen, &ptag, &pclass, len);
1167 if (ctx) {
1168 ctx->ret = i;
1169 ctx->plen = plen;
1170 ctx->pclass = pclass;
1171 ctx->ptag = ptag;
1172 ctx->hdrlen = p - q;
1173 ctx->valid = 1;
1174 /*
1175 * If definite length, and no error, length + header can't exceed
1176 * total amount of data available.
1177 */
1178 if (!(i & 0x81) && ((plen + ctx->hdrlen) > len)) {
1179 ASN1err(ASN1_F_ASN1_CHECK_TLEN, ASN1_R_TOO_LONG);
1180 asn1_tlc_clear(ctx);
1181 return 0;
1182 }
1183 }
1184 }
1185
1186 if (i & 0x80) {
1187 ASN1err(ASN1_F_ASN1_CHECK_TLEN, ASN1_R_BAD_OBJECT_HEADER);
1188 asn1_tlc_clear(ctx);
1189 return 0;
1190 }
1191 if (exptag >= 0) {
1192 if ((exptag != ptag) || (expclass != pclass)) {
1193 /*
1194 * If type is OPTIONAL, not an error: indicate missing type.
1195 */
1196 if (opt)
1197 return -1;
1198 asn1_tlc_clear(ctx);
1199 ASN1err(ASN1_F_ASN1_CHECK_TLEN, ASN1_R_WRONG_TAG);
1200 return 0;
1201 }
1202 /*
1203 * We have a tag and class match: assume we are going to do something
1204 * with it
1205 */
1206 asn1_tlc_clear(ctx);
1207 }
1208
1209 if (i & 1)
1210 plen = len - (p - q);
1211
1212 if (inf)
1213 *inf = i & 1;
1214
1215 if (cst)
1216 *cst = i & V_ASN1_CONSTRUCTED;
1217
1218 if (olen)
1219 *olen = plen;
1220
1221 if (oclass)
1222 *oclass = pclass;
1223
1224 if (otag)
1225 *otag = ptag;
1226
1227 *in = p;
1228 return 1;
1229 }
1230