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_SEQUENCE
:
296 /* If no IMPLICIT tagging set to SEQUENCE, UNIVERSAL */
298 tag
= V_ASN1_SEQUENCE
;
299 aclass
= V_ASN1_UNIVERSAL
;
301 /* Get SEQUENCE length and update len, p */
302 ret
= asn1_check_tlen(&len
, NULL
, NULL
, &seq_eoc
, &cst
, &p
, len
, tag
, aclass
, opt
, ctx
);
304 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ERR_R_NESTED_ASN1_ERROR
);
306 } else if(ret
== -1) return -1;
307 if(aux
&& (aux
->flags
& ASN1_AFLG_BROKEN
)) {
308 len
= tmplen
- (p
- *in
);
310 } else seq_nolen
= seq_eoc
; /* If indefinite we don't do a length check */
312 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ASN1_R_SEQUENCE_NOT_CONSTRUCTED
);
317 if(!ASN1_item_ex_new(pval
, it
)) {
318 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ERR_R_NESTED_ASN1_ERROR
);
322 if(asn1_cb
&& !asn1_cb(ASN1_OP_D2I_PRE
, pval
, it
))
325 /* Get each field entry */
326 for(i
= 0, tt
= it
->templates
; i
< it
->tcount
; i
++, tt
++) {
327 const ASN1_TEMPLATE
*seqtt
;
328 ASN1_VALUE
**pseqval
;
329 seqtt
= asn1_do_adb(pval
, tt
, 1);
331 pseqval
= asn1_get_field_ptr(pval
, seqtt
);
332 /* Have we ran out of data? */
335 if(asn1_check_eoc(&p
, len
)) {
337 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ASN1_R_UNEXPECTED_EOC
);
345 /* This determines the OPTIONAL flag value. The field cannot
346 * be omitted if it is the last of a SEQUENCE and there is
347 * still data to be read. This isn't strictly necessary but
348 * it increases efficiency in some cases.
350 if(i
== (it
->tcount
- 1)) isopt
= 0;
351 else isopt
= (char)(seqtt
->flags
& ASN1_TFLG_OPTIONAL
);
352 /* attempt to read in field, allowing each to be OPTIONAL */
353 ret
= asn1_template_ex_d2i(pseqval
, &p
, len
, seqtt
, isopt
, ctx
);
357 } else if(ret
== -1) {
358 /* OPTIONAL component absent. Free and zero the field
360 ASN1_template_free(pseqval
, seqtt
);
366 /* Check for EOC if expecting one */
367 if(seq_eoc
&& !asn1_check_eoc(&p
, len
)) {
368 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ASN1_R_MISSING_EOC
);
371 /* Check all data read */
372 if(!seq_nolen
&& len
) {
373 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ASN1_R_SEQUENCE_LENGTH_MISMATCH
);
377 /* If we get here we've got no more data in the SEQUENCE,
378 * however we may not have read all fields so check all
379 * remaining are OPTIONAL and clear any that are.
381 for(; i
< it
->tcount
; tt
++, i
++) {
382 const ASN1_TEMPLATE
*seqtt
;
383 seqtt
= asn1_do_adb(pval
, tt
, 1);
385 if(seqtt
->flags
& ASN1_TFLG_OPTIONAL
) {
386 ASN1_VALUE
**pseqval
;
387 pseqval
= asn1_get_field_ptr(pval
, seqtt
);
388 ASN1_template_free(pseqval
, seqtt
);
391 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ASN1_R_FIELD_MISSING
);
396 if(!asn1_enc_save(pval
, *in
, p
- *in
, it
)) goto auxerr
;
398 if(asn1_cb
&& !asn1_cb(ASN1_OP_D2I_POST
, pval
, it
))
406 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I
, ASN1_R_AUX_ERROR
);
408 ASN1_item_ex_free(pval
, it
);
409 if(errtt
) ERR_add_error_data(4, "Field=", errtt
->field_name
, ", Type=", it
->sname
);
410 else ERR_add_error_data(2, "Type=", it
->sname
);
414 /* Templates are handled with two separate functions. One handles any EXPLICIT tag and the other handles the
418 int asn1_template_ex_d2i(ASN1_VALUE
**val
, unsigned char **in
, long inlen
, const ASN1_TEMPLATE
*tt
, char opt
, ASN1_TLC
*ctx
)
423 unsigned char *p
, *q
;
427 aclass
= flags
& ASN1_TFLG_TAG_CLASS
;
431 /* Check if EXPLICIT tag expected */
432 if(flags
& ASN1_TFLG_EXPTAG
) {
434 /* Need to work out amount of data available to the inner content and where it
435 * starts: so read in EXPLICIT header to get the info.
437 ret
= asn1_check_tlen(&len
, NULL
, NULL
, &exp_eoc
, &cst
, &p
, inlen
, tt
->tag
, aclass
, opt
, ctx
);
440 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I
, ERR_R_NESTED_ASN1_ERROR
);
442 } else if(ret
== -1) return -1;
444 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I
, ASN1_R_EXPLICIT_TAG_NOT_CONSTRUCTED
);
447 /* We've found the field so it can't be OPTIONAL now */
448 ret
= asn1_template_noexp_d2i(val
, &p
, len
, tt
, 0, ctx
);
450 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I
, ERR_R_NESTED_ASN1_ERROR
);
453 /* We read the field in OK so update length */
456 /* If NDEF we must have an EOC here */
457 if(!asn1_check_eoc(&p
, len
)) {
458 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I
, ASN1_R_MISSING_EOC
);
462 /* Otherwise we must hit the EXPLICIT tag end or its an error */
464 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I
, ASN1_R_EXPLICIT_LENGTH_MISMATCH
);
469 return asn1_template_noexp_d2i(val
, in
, inlen
, tt
, opt
, ctx
);
475 ASN1_template_free(val
, tt
);
480 static int asn1_template_noexp_d2i(ASN1_VALUE
**val
, unsigned char **in
, long len
, const ASN1_TEMPLATE
*tt
, char opt
, ASN1_TLC
*ctx
)
484 unsigned char *p
, *q
;
487 aclass
= flags
& ASN1_TFLG_TAG_CLASS
;
492 if(flags
& ASN1_TFLG_SK_MASK
) {
493 /* SET OF, SEQUENCE OF */
496 /* First work out expected inner tag value */
497 if(flags
& ASN1_TFLG_IMPTAG
) {
501 skaclass
= V_ASN1_UNIVERSAL
;
502 if(flags
& ASN1_TFLG_SET_OF
) sktag
= V_ASN1_SET
;
503 else sktag
= V_ASN1_SEQUENCE
;
506 ret
= asn1_check_tlen(&len
, NULL
, NULL
, &sk_eoc
, NULL
, &p
, len
, sktag
, skaclass
, opt
, ctx
);
508 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I
, ERR_R_NESTED_ASN1_ERROR
);
510 } else if(ret
== -1) return -1;
511 if(!*val
) *val
= (ASN1_VALUE
*)sk_new_null();
513 /* We've got a valid STACK: free up any items present */
514 STACK
*sktmp
= (STACK
*)*val
;
516 while(sk_num(sktmp
) > 0) {
517 vtmp
= (ASN1_VALUE
*)sk_pop(sktmp
);
518 ASN1_item_ex_free(&vtmp
, ASN1_ITEM_ptr(tt
->item
));
523 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I
, ERR_R_MALLOC_FAILURE
);
526 /* Read as many items as we can */
530 /* See if EOC found */
531 if(asn1_check_eoc(&p
, len
)) {
533 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I
, ASN1_R_UNEXPECTED_EOC
);
541 if(!ASN1_item_ex_d2i(&skfield
, &p
, len
, ASN1_ITEM_ptr(tt
->item
), -1, 0, 0, ctx
)) {
542 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I
, ERR_R_NESTED_ASN1_ERROR
);
546 if(!sk_push((STACK
*)*val
, (char *)skfield
)) {
547 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I
, ERR_R_MALLOC_FAILURE
);
552 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I
, ASN1_R_MISSING_EOC
);
555 } else if(flags
& ASN1_TFLG_IMPTAG
) {
556 /* IMPLICIT tagging */
557 ret
= ASN1_item_ex_d2i(val
, &p
, len
, ASN1_ITEM_ptr(tt
->item
), tt
->tag
, aclass
, opt
, ctx
);
559 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I
, ERR_R_NESTED_ASN1_ERROR
);
561 } else if(ret
== -1) return -1;
563 /* Nothing special */
564 ret
= ASN1_item_ex_d2i(val
, &p
, len
, ASN1_ITEM_ptr(tt
->item
), -1, 0, opt
, ctx
);
566 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I
, ERR_R_NESTED_ASN1_ERROR
);
568 } else if(ret
== -1) return -1;
575 ASN1_template_free(val
, tt
);
580 static int asn1_d2i_ex_primitive(ASN1_VALUE
**pval
, unsigned char **in
, long inlen
,
582 int tag
, int aclass
, char opt
, ASN1_TLC
*ctx
)
586 char cst
, inf
, free_cont
= 0;
589 unsigned char *cont
= NULL
;
592 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ASN1_R_ILLEGAL_NULL
);
593 return 0; /* Should never happen */
596 if(it
->itype
== ASN1_ITYPE_MSTRING
) {
599 } else utype
= it
->utype
;
601 if(utype
== V_ASN1_ANY
) {
602 /* If type is ANY need to figure out type from tag */
603 unsigned char oclass
;
605 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ASN1_R_ILLEGAL_TAGGED_ANY
);
609 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ASN1_R_ILLEGAL_OPTIONAL_ANY
);
613 ret
= asn1_check_tlen(NULL
, &utype
, &oclass
, NULL
, NULL
, &p
, inlen
, -1, 0, 0, ctx
);
615 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ERR_R_NESTED_ASN1_ERROR
);
618 if(oclass
!= V_ASN1_UNIVERSAL
) utype
= V_ASN1_OTHER
;
622 aclass
= V_ASN1_UNIVERSAL
;
626 ret
= asn1_check_tlen(&plen
, NULL
, NULL
, &inf
, &cst
, &p
, inlen
, tag
, aclass
, opt
, ctx
);
628 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ERR_R_NESTED_ASN1_ERROR
);
630 } else if(ret
== -1) return -1;
631 /* SEQUENCE, SET and "OTHER" are left in encoded form */
632 if((utype
== V_ASN1_SEQUENCE
) || (utype
== V_ASN1_SET
) || (utype
== V_ASN1_OTHER
)) {
633 /* Clear context cache for type OTHER because the auto clear when
634 * we have a exact match wont work
636 if(utype
== V_ASN1_OTHER
) {
638 /* SEQUENCE and SET must be constructed */
640 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ASN1_R_TYPE_NOT_CONSTRUCTED
);
645 /* If indefinite length constructed find the real end */
647 if(!asn1_collect(NULL
, &p
, plen
, inf
, -1, -1)) goto err
;
650 len
= p
- cont
+ plen
;
658 /* Should really check the internal tags are correct but
659 * some things may get this wrong. The relevant specs
660 * say that constructed string types should be OCTET STRINGs
661 * internally irrespective of the type. So instead just check
662 * for UNIVERSAL class and ignore the tag.
664 if(!asn1_collect(&buf
, &p
, plen
, inf
, -1, V_ASN1_UNIVERSAL
)) goto err
;
666 /* Append a final null to string */
667 if(!BUF_MEM_grow(&buf
, len
+ 1)) {
668 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ERR_R_MALLOC_FAILURE
);
672 cont
= (unsigned char *)buf
.data
;
680 /* We now have content length and type: translate into a structure */
681 if(!asn1_ex_c2i(pval
, cont
, len
, utype
, &free_cont
, it
)) goto err
;
686 if(free_cont
&& buf
.data
) OPENSSL_free(buf
.data
);
690 /* Translate ASN1 content octets into a structure */
692 int asn1_ex_c2i(ASN1_VALUE
**pval
, unsigned char *cont
, int len
, int utype
, char *free_cont
, const ASN1_ITEM
*it
)
695 ASN1_TYPE
*typ
= NULL
;
697 const ASN1_PRIMITIVE_FUNCS
*pf
;
700 if(pf
&& pf
->prim_c2i
) return pf
->prim_c2i(pval
, cont
, len
, utype
, free_cont
, it
);
701 /* If ANY type clear type and set pointer to internal value */
702 if(it
->utype
== V_ASN1_ANY
) {
704 typ
= ASN1_TYPE_new();
705 *pval
= (ASN1_VALUE
*)typ
;
706 } else typ
= (ASN1_TYPE
*)*pval
;
707 if(utype
!= typ
->type
) ASN1_TYPE_set(typ
, utype
, NULL
);
708 pval
= (ASN1_VALUE
**)&typ
->value
.ptr
;
712 if(!c2i_ASN1_OBJECT((ASN1_OBJECT
**)pval
, &cont
, len
)) goto err
;
717 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ASN1_R_NULL_IS_WRONG_LENGTH
);
720 *pval
= (ASN1_VALUE
*)1;
725 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ASN1_R_BOOLEAN_IS_WRONG_LENGTH
);
729 tbool
= (ASN1_BOOLEAN
*)pval
;
734 case V_ASN1_BIT_STRING
:
735 if(!c2i_ASN1_BIT_STRING((ASN1_BIT_STRING
**)pval
, &cont
, len
)) goto err
;
739 case V_ASN1_NEG_INTEGER
:
740 case V_ASN1_ENUMERATED
:
741 case V_ASN1_NEG_ENUMERATED
:
742 tint
= (ASN1_INTEGER
**)pval
;
743 if(!c2i_ASN1_INTEGER(tint
, &cont
, len
)) goto err
;
744 /* Fixup type to match the expected form */
745 (*tint
)->type
= utype
| ((*tint
)->type
& V_ASN1_NEG
);
748 case V_ASN1_OCTET_STRING
:
749 case V_ASN1_NUMERICSTRING
:
750 case V_ASN1_PRINTABLESTRING
:
751 case V_ASN1_T61STRING
:
752 case V_ASN1_VIDEOTEXSTRING
:
753 case V_ASN1_IA5STRING
:
755 case V_ASN1_GENERALIZEDTIME
:
756 case V_ASN1_GRAPHICSTRING
:
757 case V_ASN1_VISIBLESTRING
:
758 case V_ASN1_GENERALSTRING
:
759 case V_ASN1_UNIVERSALSTRING
:
760 case V_ASN1_BMPSTRING
:
761 case V_ASN1_UTF8STRING
:
764 case V_ASN1_SEQUENCE
:
766 /* All based on ASN1_STRING and handled the same */
768 stmp
= ASN1_STRING_type_new(utype
);
770 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ERR_R_MALLOC_FAILURE
);
773 *pval
= (ASN1_VALUE
*)stmp
;
775 stmp
= (ASN1_STRING
*)*pval
;
778 /* If we've already allocated a buffer use it */
780 if(stmp
->data
) OPENSSL_free(stmp
->data
);
785 if(!ASN1_STRING_set(stmp
, cont
, len
)) {
786 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE
, ERR_R_MALLOC_FAILURE
);
787 ASN1_STRING_free(stmp
);
794 /* If ASN1_ANY and NULL type fix up value */
795 if(typ
&& utype
==V_ASN1_NULL
) typ
->value
.ptr
= NULL
;
799 if(!ret
) ASN1_TYPE_free(typ
);
803 /* This function collects the asn1 data from a constructred string
804 * type into a buffer. The values of 'in' and 'len' should refer
805 * to the contents of the constructed type and 'inf' should be set
806 * if it is indefinite length. If 'buf' is NULL then we just want
807 * to find the end of the current structure: useful for indefinite
808 * length constructed stuff.
811 static int asn1_collect(BUF_MEM
*buf
, unsigned char **in
, long len
, char inf
, int tag
, int aclass
)
813 unsigned char *p
, *q
;
818 /* If no buffer and not indefinite length constructed just pass over the encoded data */
826 if(asn1_check_eoc(&p
, len
)) {
827 /* EOC is illegal outside indefinite length constructed form */
829 ASN1err(ASN1_F_ASN1_COLLECT
, ASN1_R_UNEXPECTED_EOC
);
835 if(!asn1_check_tlen(&plen
, NULL
, NULL
, &ininf
, &cst
, &p
, len
, tag
, aclass
, 0, NULL
)) {
836 ASN1err(ASN1_F_ASN1_COLLECT
, ERR_R_NESTED_ASN1_ERROR
);
839 /* If indefinite length constructed update max length */
841 if(!asn1_collect(buf
, &p
, plen
, ininf
, tag
, aclass
)) return 0;
843 if(!collect_data(buf
, &p
, plen
)) return 0;
848 ASN1err(ASN1_F_ASN1_COLLECT
, ASN1_R_MISSING_EOC
);
855 static int collect_data(BUF_MEM
*buf
, unsigned char **p
, long plen
)
860 if(!BUF_MEM_grow(buf
, len
+ plen
)) {
861 ASN1err(ASN1_F_COLLECT_DATA
, ERR_R_MALLOC_FAILURE
);
864 memcpy(buf
->data
+ len
, *p
, plen
);
870 /* Check for ASN1 EOC and swallow it if found */
872 static int asn1_check_eoc(unsigned char **in
, long len
)
875 if(len
< 2) return 0;
884 /* Check an ASN1 tag and length: a bit like ASN1_get_object
885 * but it sets the length for indefinite length constructed
886 * form, we don't know the exact length but we can set an
887 * upper bound to the amount of data available minus the
888 * header length just read.
891 static int asn1_check_tlen(long *olen
, int *otag
, unsigned char *oclass
, char *inf
, char *cst
,
892 unsigned char **in
, long len
, int exptag
, int expclass
, char opt
, ASN1_TLC
*ctx
)
897 unsigned char *p
, *q
;
901 if(ctx
&& ctx
->valid
) {
904 pclass
= ctx
->pclass
;
908 i
= ASN1_get_object(&p
, &plen
, &ptag
, &pclass
, len
);
912 ctx
->pclass
= pclass
;
916 /* If definite length, length + header can't exceed total
917 * amount of data available.
919 if(!(i
& 1) && ((plen
+ ctx
->hdrlen
) > len
)) {
920 ASN1err(ASN1_F_ASN1_CHECK_TLEN
, ASN1_R_TOO_LONG
);
928 ASN1err(ASN1_F_ASN1_CHECK_TLEN
, ASN1_R_BAD_OBJECT_HEADER
);
933 if((exptag
!= ptag
) || (expclass
!= pclass
)) {
934 /* If type is OPTIONAL, not an error, but indicate missing
939 ASN1err(ASN1_F_ASN1_CHECK_TLEN
, ASN1_R_WRONG_TAG
);
942 /* We have a tag and class match, so assume we are going to do something with it */
946 if(i
& 1) plen
= len
- (p
- q
);
948 if(inf
) *inf
= i
& 1;
950 if(cst
) *cst
= i
& V_ASN1_CONSTRUCTED
;
952 if(olen
) *olen
= plen
;
953 if(oclass
) *oclass
= pclass
;
954 if(otag
) *otag
= ptag
;