2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
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>
68 static int asn1_check_eoc(unsigned char **in
, long len
);
69 static int asn1_collect(BUF_MEM
*buf
, unsigned char **in
, long len
, char inf
, int tag
, int aclass
);
70 static int collect_data(BUF_MEM
*buf
, unsigned char **p
, long plen
);
71 static int asn1_check_tlen(long *olen
, int *otag
, unsigned char *oclass
, char *inf
, char *cst
,
72 unsigned char **in
, long len
, int exptag
, int expclass
, char opt
, ASN1_TLC
*ctx
);
73 static int asn1_template_ex_d2i(ASN1_VALUE
**pval
, unsigned char **in
, long len
, const ASN1_TEMPLATE
*tt
, char opt
, ASN1_TLC
*ctx
);
74 static int asn1_template_noexp_d2i(ASN1_VALUE
**val
, unsigned char **in
, long len
, const ASN1_TEMPLATE
*tt
, char opt
, ASN1_TLC
*ctx
);
75 static int asn1_d2i_ex_primitive(ASN1_VALUE
**pval
, unsigned char **in
, long len
,
76 const ASN1_ITEM
*it
, int tag
, int aclass
, char opt
, ASN1_TLC
*ctx
);
78 /* Table to convert tags to bit values, used for MSTRING type */
79 static unsigned long tag2bit
[32]={
80 0, 0, 0, B_ASN1_BIT_STRING
, /* tags 0 - 3 */
81 B_ASN1_OCTET_STRING
, 0, 0, B_ASN1_UNKNOWN
,/* tags 4- 7 */
82 B_ASN1_UNKNOWN
, B_ASN1_UNKNOWN
, B_ASN1_UNKNOWN
, B_ASN1_UNKNOWN
,/* tags 8-11 */
83 B_ASN1_UTF8STRING
,B_ASN1_UNKNOWN
,B_ASN1_UNKNOWN
,B_ASN1_UNKNOWN
,/* tags 12-15 */
84 0, 0, B_ASN1_NUMERICSTRING
,B_ASN1_PRINTABLESTRING
, /* tags 16-19 */
85 B_ASN1_T61STRING
,B_ASN1_VIDEOTEXSTRING
,B_ASN1_IA5STRING
, /* tags 20-22 */
86 B_ASN1_UTCTIME
, B_ASN1_GENERALIZEDTIME
, /* tags 23-24 */
87 B_ASN1_GRAPHICSTRING
,B_ASN1_ISO64STRING
,B_ASN1_GENERALSTRING
, /* tags 25-27 */
88 B_ASN1_UNIVERSALSTRING
,B_ASN1_UNKNOWN
,B_ASN1_BMPSTRING
,B_ASN1_UNKNOWN
, /* tags 28-31 */
91 unsigned long ASN1_tag2bit(int tag
)
93 if((tag
< 0) || (tag
> 30)) return 0;
97 /* Macro to initialize and invalidate the cache */
99 #define asn1_tlc_clear(c) if(c) (c)->valid = 0
101 /* Decode an ASN1 item, this currently behaves just
102 * like a standard 'd2i' function. 'in' points to
103 * a buffer to read the data from, in future we will
104 * have more advanced versions that can input data
105 * a piece at a time and this will simply be a special
109 ASN1_VALUE
*ASN1_item_d2i(ASN1_VALUE
**pval
, unsigned char **in
, long len
, const ASN1_ITEM
*it
)
112 ASN1_VALUE
*ptmpval
= NULL
;
113 if(!pval
) pval
= &ptmpval
;
115 if(ASN1_item_ex_d2i(pval
, in
, len
, it
, -1, 0, 0, &c
) > 0)
120 int ASN1_template_d2i(ASN1_VALUE
**pval
, unsigned char **in
, long len
, const ASN1_TEMPLATE
*tt
)
124 return asn1_template_ex_d2i(pval
, in
, len
, tt
, 0, &c
);
128 /* Decode an item, taking care of IMPLICIT tagging, if any.
129 * If 'opt' set and tag mismatch return -1 to handle OPTIONAL
132 int ASN1_item_ex_d2i(ASN1_VALUE
**pval
, unsigned char **in
, long len
, const ASN1_ITEM
*it
,
133 int tag
, int aclass
, char opt
, ASN1_TLC
*ctx
)
135 const ASN1_TEMPLATE
*tt
, *errtt
= NULL
;
136 const ASN1_COMPAT_FUNCS
*cf
;
137 const ASN1_EXTERN_FUNCS
*ef
;
138 const ASN1_AUX
*aux
= it
->funcs
;
139 ASN1_aux_cb
*asn1_cb
;
140 unsigned char *p
, *q
, imphack
= 0, oclass
;
141 char seq_eoc
, seq_nolen
, cst
, isopt
;
146 ASN1_VALUE
*pchval
, **pchptr
, *ptmpval
;
148 if(aux
&& aux
->asn1_cb
) asn1_cb
= aux
->asn1_cb
;
153 case ASN1_ITYPE_PRIMITIVE
:
155 /* tagging or OPTIONAL is currently illegal on an item template
156 * because the flags can't get passed down. In practice this isn't
157 * a problem: we include the relevant flags from the item template
158 * in the template itself.
160 if ((tag
!= -1) || opt
) {
161 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ASN1_R_ILLEGAL_OPTIONS_ON_ITEM_TEMPLATE
);
164 return asn1_template_ex_d2i(pval
, in
, len
, it
->templates
, opt
, ctx
);
166 return asn1_d2i_ex_primitive(pval
, in
, len
, it
, tag
, aclass
, opt
, ctx
);
169 case ASN1_ITYPE_MSTRING
:
171 /* Just read in tag and class */
172 ret
= asn1_check_tlen(NULL
, &otag
, &oclass
, NULL
, NULL
, &p
, len
, -1, 0, 1, ctx
);
174 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ERR_R_NESTED_ASN1_ERROR
);
177 /* Must be UNIVERSAL class */
178 if(oclass
!= V_ASN1_UNIVERSAL
) {
179 /* If OPTIONAL, assume this is OK */
181 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ASN1_R_MSTRING_NOT_UNIVERSAL
);
184 /* Check tag matches bit map */
185 if(!(ASN1_tag2bit(otag
) & it
->utype
)) {
186 /* If OPTIONAL, assume this is OK */
188 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ASN1_R_MSTRING_WRONG_TAG
);
191 return asn1_d2i_ex_primitive(pval
, in
, len
, it
, otag
, 0, 0, ctx
);
193 case ASN1_ITYPE_EXTERN
:
194 /* Use new style d2i */
196 return ef
->asn1_ex_d2i(pval
, in
, len
, it
, tag
, aclass
, opt
, ctx
);
198 case ASN1_ITYPE_COMPAT
:
199 /* we must resort to old style evil hackery */
202 /* If OPTIONAL see if it is there */
206 if(tag
== -1) exptag
= it
->utype
;
208 /* Don't care about anything other than presence of expected tag */
209 ret
= asn1_check_tlen(NULL
, NULL
, NULL
, NULL
, NULL
, &p
, len
, exptag
, aclass
, 1, ctx
);
211 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ERR_R_NESTED_ASN1_ERROR
);
214 if(ret
== -1) return -1;
216 /* This is the old style evil hack IMPLICIT handling:
217 * since the underlying code is expecting a tag and
218 * class other than the one present we change the
219 * buffer temporarily then change it back afterwards.
220 * This doesn't and never did work for tags > 30.
222 * Yes this is *horrible* but it is only needed for
223 * old style d2i which will hopefully not be around
225 * FIXME: should copy the buffer then modify it so
226 * the input buffer can be const: we should *always*
227 * copy because the old style d2i might modify the
234 *p
= (unsigned char)((*p
& V_ASN1_CONSTRUCTED
) | it
->utype
);
237 ptmpval
= cf
->asn1_d2i(pval
, in
, len
);
239 if(tag
!= -1) *p
= imphack
;
241 if(ptmpval
) return 1;
242 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ERR_R_NESTED_ASN1_ERROR
);
246 case ASN1_ITYPE_CHOICE
:
247 if(asn1_cb
&& !asn1_cb(ASN1_OP_D2I_PRE
, pval
, it
))
250 /* Allocate structure */
252 if(!ASN1_item_ex_new(pval
, it
)) {
253 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ERR_R_NESTED_ASN1_ERROR
);
257 /* CHOICE type, try each possibility in turn */
260 for(i
= 0, tt
=it
->templates
; i
< it
->tcount
; i
++, tt
++) {
261 pchptr
= asn1_get_field_ptr(pval
, tt
);
262 /* We mark field as OPTIONAL so its absence
265 ret
= asn1_template_ex_d2i(pchptr
, &p
, len
, tt
, 1, ctx
);
266 /* If field not present, try the next one */
267 if(ret
== -1) continue;
268 /* If positive return, read OK, break loop */
270 /* Otherwise must be an ASN1 parsing error */
272 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ERR_R_NESTED_ASN1_ERROR
);
275 /* Did we fall off the end without reading anything? */
276 if(i
== it
->tcount
) {
277 /* If OPTIONAL, this is OK */
279 /* Free and zero it */
280 ASN1_item_ex_free(pval
, it
);
283 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ASN1_R_NO_MATCHING_CHOICE_TYPE
);
286 asn1_set_choice_selector(pval
, i
, it
);
288 if(asn1_cb
&& !asn1_cb(ASN1_OP_D2I_POST
, pval
, it
))
292 case ASN1_ITYPE_NDEF_SEQUENCE
:
293 case ASN1_ITYPE_SEQUENCE
:
297 /* If no IMPLICIT tagging set to SEQUENCE, UNIVERSAL */
299 tag
= V_ASN1_SEQUENCE
;
300 aclass
= V_ASN1_UNIVERSAL
;
302 /* Get SEQUENCE length and update len, p */
303 ret
= asn1_check_tlen(&len
, NULL
, NULL
, &seq_eoc
, &cst
, &p
, len
, tag
, aclass
, opt
, ctx
);
305 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ERR_R_NESTED_ASN1_ERROR
);
307 } else if(ret
== -1) return -1;
308 if(aux
&& (aux
->flags
& ASN1_AFLG_BROKEN
)) {
309 len
= tmplen
- (p
- *in
);
311 } else seq_nolen
= seq_eoc
; /* If indefinite we don't do a length check */
313 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ASN1_R_SEQUENCE_NOT_CONSTRUCTED
);
318 if(!ASN1_item_ex_new(pval
, it
)) {
319 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ERR_R_NESTED_ASN1_ERROR
);
323 if(asn1_cb
&& !asn1_cb(ASN1_OP_D2I_PRE
, pval
, it
))
326 /* Get each field entry */
327 for(i
= 0, tt
= it
->templates
; i
< it
->tcount
; i
++, tt
++) {
328 const ASN1_TEMPLATE
*seqtt
;
329 ASN1_VALUE
**pseqval
;
330 seqtt
= asn1_do_adb(pval
, tt
, 1);
332 pseqval
= asn1_get_field_ptr(pval
, seqtt
);
333 /* Have we ran out of data? */
336 if(asn1_check_eoc(&p
, len
)) {
338 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ASN1_R_UNEXPECTED_EOC
);
346 /* This determines the OPTIONAL flag value. The field cannot
347 * be omitted if it is the last of a SEQUENCE and there is
348 * still data to be read. This isn't strictly necessary but
349 * it increases efficiency in some cases.
351 if(i
== (it
->tcount
- 1)) isopt
= 0;
352 else isopt
= (char)(seqtt
->flags
& ASN1_TFLG_OPTIONAL
);
353 /* attempt to read in field, allowing each to be OPTIONAL */
354 ret
= asn1_template_ex_d2i(pseqval
, &p
, len
, seqtt
, isopt
, ctx
);
358 } else if(ret
== -1) {
359 /* OPTIONAL component absent. Free and zero the field
361 ASN1_template_free(pseqval
, seqtt
);
367 /* Check for EOC if expecting one */
368 if(seq_eoc
&& !asn1_check_eoc(&p
, len
)) {
369 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ASN1_R_MISSING_EOC
);
372 /* Check all data read */
373 if(!seq_nolen
&& len
) {
374 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ASN1_R_SEQUENCE_LENGTH_MISMATCH
);
378 /* If we get here we've got no more data in the SEQUENCE,
379 * however we may not have read all fields so check all
380 * remaining are OPTIONAL and clear any that are.
382 for(; i
< it
->tcount
; tt
++, i
++) {
383 const ASN1_TEMPLATE
*seqtt
;
384 seqtt
= asn1_do_adb(pval
, tt
, 1);
386 if(seqtt
->flags
& ASN1_TFLG_OPTIONAL
) {
387 ASN1_VALUE
**pseqval
;
388 pseqval
= asn1_get_field_ptr(pval
, seqtt
);
389 ASN1_template_free(pseqval
, seqtt
);
392 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ASN1_R_FIELD_MISSING
);
397 if(!asn1_enc_save(pval
, *in
, p
- *in
, it
)) goto auxerr
;
399 if(asn1_cb
&& !asn1_cb(ASN1_OP_D2I_POST
, pval
, it
))
407 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ASN1_R_AUX_ERROR
);
409 ASN1_item_ex_free(pval
, it
);
410 if(errtt
) ERR_add_error_data(4, "Field=", errtt
->field_name
, ", Type=", it
->sname
);
411 else ERR_add_error_data(2, "Type=", it
->sname
);
415 /* Templates are handled with two separate functions. One handles any EXPLICIT tag and the other handles the
419 static int asn1_template_ex_d2i(ASN1_VALUE
**val
, unsigned char **in
, long inlen
, const ASN1_TEMPLATE
*tt
, char opt
, ASN1_TLC
*ctx
)
424 unsigned char *p
, *q
;
428 aclass
= flags
& ASN1_TFLG_TAG_CLASS
;
432 /* Check if EXPLICIT tag expected */
433 if(flags
& ASN1_TFLG_EXPTAG
) {
435 /* Need to work out amount of data available to the inner content and where it
436 * starts: so read in EXPLICIT header to get the info.
438 ret
= asn1_check_tlen(&len
, NULL
, NULL
, &exp_eoc
, &cst
, &p
, inlen
, tt
->tag
, aclass
, opt
, ctx
);
441 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I
, ERR_R_NESTED_ASN1_ERROR
);
443 } else if(ret
== -1) return -1;
445 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I
, ASN1_R_EXPLICIT_TAG_NOT_CONSTRUCTED
);
448 /* We've found the field so it can't be OPTIONAL now */
449 ret
= asn1_template_noexp_d2i(val
, &p
, len
, tt
, 0, ctx
);
451 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I
, ERR_R_NESTED_ASN1_ERROR
);
454 /* We read the field in OK so update length */
457 /* If NDEF we must have an EOC here */
458 if(!asn1_check_eoc(&p
, len
)) {
459 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I
, ASN1_R_MISSING_EOC
);
463 /* Otherwise we must hit the EXPLICIT tag end or its an error */
465 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I
, ASN1_R_EXPLICIT_LENGTH_MISMATCH
);
470 return asn1_template_noexp_d2i(val
, in
, inlen
, tt
, opt
, ctx
);
476 ASN1_template_free(val
, tt
);
481 static int asn1_template_noexp_d2i(ASN1_VALUE
**val
, unsigned char **in
, long len
, const ASN1_TEMPLATE
*tt
, char opt
, ASN1_TLC
*ctx
)
485 unsigned char *p
, *q
;
488 aclass
= flags
& ASN1_TFLG_TAG_CLASS
;
493 if(flags
& ASN1_TFLG_SK_MASK
) {
494 /* SET OF, SEQUENCE OF */
497 /* First work out expected inner tag value */
498 if(flags
& ASN1_TFLG_IMPTAG
) {
502 skaclass
= V_ASN1_UNIVERSAL
;
503 if(flags
& ASN1_TFLG_SET_OF
) sktag
= V_ASN1_SET
;
504 else sktag
= V_ASN1_SEQUENCE
;
507 ret
= asn1_check_tlen(&len
, NULL
, NULL
, &sk_eoc
, NULL
, &p
, len
, sktag
, skaclass
, opt
, ctx
);
509 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I
, ERR_R_NESTED_ASN1_ERROR
);
511 } else if(ret
== -1) return -1;
512 if(!*val
) *val
= (ASN1_VALUE
*)sk_new_null();
514 /* We've got a valid STACK: free up any items present */
515 STACK
*sktmp
= (STACK
*)*val
;
517 while(sk_num(sktmp
) > 0) {
518 vtmp
= (ASN1_VALUE
*)sk_pop(sktmp
);
519 ASN1_item_ex_free(&vtmp
, ASN1_ITEM_ptr(tt
->item
));
524 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I
, ERR_R_MALLOC_FAILURE
);
527 /* Read as many items as we can */
531 /* See if EOC found */
532 if(asn1_check_eoc(&p
, len
)) {
534 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I
, ASN1_R_UNEXPECTED_EOC
);
542 if(!ASN1_item_ex_d2i(&skfield
, &p
, len
, ASN1_ITEM_ptr(tt
->item
), -1, 0, 0, ctx
)) {
543 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I
, ERR_R_NESTED_ASN1_ERROR
);
547 if(!sk_push((STACK
*)*val
, (char *)skfield
)) {
548 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I
, ERR_R_MALLOC_FAILURE
);
553 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I
, ASN1_R_MISSING_EOC
);
556 } else if(flags
& ASN1_TFLG_IMPTAG
) {
557 /* IMPLICIT tagging */
558 ret
= ASN1_item_ex_d2i(val
, &p
, len
, ASN1_ITEM_ptr(tt
->item
), tt
->tag
, aclass
, opt
, ctx
);
560 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I
, ERR_R_NESTED_ASN1_ERROR
);
562 } else if(ret
== -1) return -1;
564 /* Nothing special */
565 ret
= ASN1_item_ex_d2i(val
, &p
, len
, ASN1_ITEM_ptr(tt
->item
), -1, 0, opt
, ctx
);
567 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I
, ERR_R_NESTED_ASN1_ERROR
);
569 } else if(ret
== -1) return -1;
576 ASN1_template_free(val
, tt
);
581 static int asn1_d2i_ex_primitive(ASN1_VALUE
**pval
, unsigned char **in
, long inlen
,
583 int tag
, int aclass
, char opt
, ASN1_TLC
*ctx
)
587 char cst
, inf
, free_cont
= 0;
590 unsigned char *cont
= NULL
;
593 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ASN1_R_ILLEGAL_NULL
);
594 return 0; /* Should never happen */
597 if(it
->itype
== ASN1_ITYPE_MSTRING
) {
600 } else utype
= it
->utype
;
602 if(utype
== V_ASN1_ANY
) {
603 /* If type is ANY need to figure out type from tag */
604 unsigned char oclass
;
606 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ASN1_R_ILLEGAL_TAGGED_ANY
);
610 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ASN1_R_ILLEGAL_OPTIONAL_ANY
);
614 ret
= asn1_check_tlen(NULL
, &utype
, &oclass
, NULL
, NULL
, &p
, inlen
, -1, 0, 0, ctx
);
616 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ERR_R_NESTED_ASN1_ERROR
);
619 if(oclass
!= V_ASN1_UNIVERSAL
) utype
= V_ASN1_OTHER
;
623 aclass
= V_ASN1_UNIVERSAL
;
627 ret
= asn1_check_tlen(&plen
, NULL
, NULL
, &inf
, &cst
, &p
, inlen
, tag
, aclass
, opt
, ctx
);
629 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ERR_R_NESTED_ASN1_ERROR
);
631 } else if(ret
== -1) return -1;
632 /* SEQUENCE, SET and "OTHER" are left in encoded form */
633 if((utype
== V_ASN1_SEQUENCE
) || (utype
== V_ASN1_SET
) || (utype
== V_ASN1_OTHER
)) {
634 /* Clear context cache for type OTHER because the auto clear when
635 * we have a exact match wont work
637 if(utype
== V_ASN1_OTHER
) {
639 /* SEQUENCE and SET must be constructed */
641 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ASN1_R_TYPE_NOT_CONSTRUCTED
);
646 /* If indefinite length constructed find the real end */
648 if(!asn1_collect(NULL
, &p
, plen
, inf
, -1, -1)) goto err
;
651 len
= p
- cont
+ plen
;
659 /* Should really check the internal tags are correct but
660 * some things may get this wrong. The relevant specs
661 * say that constructed string types should be OCTET STRINGs
662 * internally irrespective of the type. So instead just check
663 * for UNIVERSAL class and ignore the tag.
665 if(!asn1_collect(&buf
, &p
, plen
, inf
, -1, V_ASN1_UNIVERSAL
)) goto err
;
667 /* Append a final null to string */
668 if(!BUF_MEM_grow_clean(&buf
, len
+ 1)) {
669 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ERR_R_MALLOC_FAILURE
);
673 cont
= (unsigned char *)buf
.data
;
681 /* We now have content length and type: translate into a structure */
682 if(!asn1_ex_c2i(pval
, cont
, len
, utype
, &free_cont
, it
)) goto err
;
687 if(free_cont
&& buf
.data
) OPENSSL_free(buf
.data
);
691 /* Translate ASN1 content octets into a structure */
693 int asn1_ex_c2i(ASN1_VALUE
**pval
, unsigned char *cont
, int len
, int utype
, char *free_cont
, const ASN1_ITEM
*it
)
695 ASN1_VALUE
**opval
= NULL
;
697 ASN1_TYPE
*typ
= NULL
;
699 const ASN1_PRIMITIVE_FUNCS
*pf
;
702 if(pf
&& pf
->prim_c2i
) return pf
->prim_c2i(pval
, cont
, len
, utype
, free_cont
, it
);
703 /* If ANY type clear type and set pointer to internal value */
704 if(it
->utype
== V_ASN1_ANY
) {
706 typ
= ASN1_TYPE_new();
707 *pval
= (ASN1_VALUE
*)typ
;
708 } else typ
= (ASN1_TYPE
*)*pval
;
709 if(utype
!= typ
->type
) ASN1_TYPE_set(typ
, utype
, NULL
);
711 pval
= (ASN1_VALUE
**)&typ
->value
.ptr
;
715 if(!c2i_ASN1_OBJECT((ASN1_OBJECT
**)pval
, &cont
, len
)) goto err
;
720 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ASN1_R_NULL_IS_WRONG_LENGTH
);
723 *pval
= (ASN1_VALUE
*)1;
728 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ASN1_R_BOOLEAN_IS_WRONG_LENGTH
);
732 tbool
= (ASN1_BOOLEAN
*)pval
;
737 case V_ASN1_BIT_STRING
:
738 if(!c2i_ASN1_BIT_STRING((ASN1_BIT_STRING
**)pval
, &cont
, len
)) goto err
;
742 case V_ASN1_NEG_INTEGER
:
743 case V_ASN1_ENUMERATED
:
744 case V_ASN1_NEG_ENUMERATED
:
745 tint
= (ASN1_INTEGER
**)pval
;
746 if(!c2i_ASN1_INTEGER(tint
, &cont
, len
)) goto err
;
747 /* Fixup type to match the expected form */
748 (*tint
)->type
= utype
| ((*tint
)->type
& V_ASN1_NEG
);
751 case V_ASN1_OCTET_STRING
:
752 case V_ASN1_NUMERICSTRING
:
753 case V_ASN1_PRINTABLESTRING
:
754 case V_ASN1_T61STRING
:
755 case V_ASN1_VIDEOTEXSTRING
:
756 case V_ASN1_IA5STRING
:
758 case V_ASN1_GENERALIZEDTIME
:
759 case V_ASN1_GRAPHICSTRING
:
760 case V_ASN1_VISIBLESTRING
:
761 case V_ASN1_GENERALSTRING
:
762 case V_ASN1_UNIVERSALSTRING
:
763 case V_ASN1_BMPSTRING
:
764 case V_ASN1_UTF8STRING
:
767 case V_ASN1_SEQUENCE
:
769 /* All based on ASN1_STRING and handled the same */
771 stmp
= ASN1_STRING_type_new(utype
);
773 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ERR_R_MALLOC_FAILURE
);
776 *pval
= (ASN1_VALUE
*)stmp
;
778 stmp
= (ASN1_STRING
*)*pval
;
781 /* If we've already allocated a buffer use it */
783 if(stmp
->data
) OPENSSL_free(stmp
->data
);
788 if(!ASN1_STRING_set(stmp
, cont
, len
)) {
789 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ERR_R_MALLOC_FAILURE
);
790 ASN1_STRING_free(stmp
);
797 /* If ASN1_ANY and NULL type fix up value */
798 if(typ
&& utype
==V_ASN1_NULL
) typ
->value
.ptr
= NULL
;
811 /* This function collects the asn1 data from a constructred string
812 * type into a buffer. The values of 'in' and 'len' should refer
813 * to the contents of the constructed type and 'inf' should be set
814 * if it is indefinite length. If 'buf' is NULL then we just want
815 * to find the end of the current structure: useful for indefinite
816 * length constructed stuff.
819 static int asn1_collect(BUF_MEM
*buf
, unsigned char **in
, long len
, char inf
, int tag
, int aclass
)
821 unsigned char *p
, *q
;
826 /* If no buffer and not indefinite length constructed just pass over the encoded data */
834 if(asn1_check_eoc(&p
, len
)) {
835 /* EOC is illegal outside indefinite length constructed form */
837 ASN1err(ASN1_F_ASN1_COLLECT
, ASN1_R_UNEXPECTED_EOC
);
843 if(!asn1_check_tlen(&plen
, NULL
, NULL
, &ininf
, &cst
, &p
, len
, tag
, aclass
, 0, NULL
)) {
844 ASN1err(ASN1_F_ASN1_COLLECT
, ERR_R_NESTED_ASN1_ERROR
);
847 /* If indefinite length constructed update max length */
849 if(!asn1_collect(buf
, &p
, plen
, ininf
, tag
, aclass
)) return 0;
851 if(!collect_data(buf
, &p
, plen
)) return 0;
856 ASN1err(ASN1_F_ASN1_COLLECT
, ASN1_R_MISSING_EOC
);
863 static int collect_data(BUF_MEM
*buf
, unsigned char **p
, long plen
)
868 if(!BUF_MEM_grow_clean(buf
, len
+ plen
)) {
869 ASN1err(ASN1_F_COLLECT_DATA
, ERR_R_MALLOC_FAILURE
);
872 memcpy(buf
->data
+ len
, *p
, plen
);
878 /* Check for ASN1 EOC and swallow it if found */
880 static int asn1_check_eoc(unsigned char **in
, long len
)
883 if(len
< 2) return 0;
892 /* Check an ASN1 tag and length: a bit like ASN1_get_object
893 * but it sets the length for indefinite length constructed
894 * form, we don't know the exact length but we can set an
895 * upper bound to the amount of data available minus the
896 * header length just read.
899 static int asn1_check_tlen(long *olen
, int *otag
, unsigned char *oclass
, char *inf
, char *cst
,
900 unsigned char **in
, long len
, int exptag
, int expclass
, char opt
, ASN1_TLC
*ctx
)
905 unsigned char *p
, *q
;
909 if(ctx
&& ctx
->valid
) {
912 pclass
= ctx
->pclass
;
916 i
= ASN1_get_object(&p
, &plen
, &ptag
, &pclass
, len
);
920 ctx
->pclass
= pclass
;
924 /* If definite length, and no error, length +
925 * header can't exceed total amount of data available.
927 if(!(i
& 0x81) && ((plen
+ ctx
->hdrlen
) > len
)) {
928 ASN1err(ASN1_F_ASN1_CHECK_TLEN
, ASN1_R_TOO_LONG
);
936 ASN1err(ASN1_F_ASN1_CHECK_TLEN
, ASN1_R_BAD_OBJECT_HEADER
);
941 if((exptag
!= ptag
) || (expclass
!= pclass
)) {
942 /* If type is OPTIONAL, not an error, but indicate missing
947 ASN1err(ASN1_F_ASN1_CHECK_TLEN
, ASN1_R_WRONG_TAG
);
950 /* We have a tag and class match, so assume we are going to do something with it */
954 if(i
& 1) plen
= len
- (p
- q
);
956 if(inf
) *inf
= i
& 1;
958 if(cst
) *cst
= i
& V_ASN1_CONSTRUCTED
;
960 if(olen
) *olen
= plen
;
961 if(oclass
) *oclass
= pclass
;
962 if(otag
) *otag
= ptag
;