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 /* Macro to initialize and invalidate the cache */
80 #define asn1_tlc_clear(c) if(c) (c)->valid = 0
82 /* Decode an ASN1 item, this currently behaves just
83 * like a standard 'd2i' function. 'in' points to
84 * a buffer to read the data from, in future we will
85 * have more advanced versions that can input data
86 * a piece at a time and this will simply be a special
90 ASN1_VALUE *ASN1_item_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_ITEM *it)
93 ASN1_VALUE *ptmpval = NULL;
94 if(!pval) pval = &ptmpval;
96 if(ASN1_item_ex_d2i(pval, in, len, it, -1, 0, 0, &c) > 0)
101 int ASN1_template_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_TEMPLATE *tt)
105 return asn1_template_ex_d2i(pval, in, len, tt, 0, &c);
109 /* Decode an item, taking care of IMPLICIT tagging, if any.
110 * If 'opt' set and tag mismatch return -1 to handle OPTIONAL
113 int ASN1_item_ex_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_ITEM *it,
114 int tag, int aclass, char opt, ASN1_TLC *ctx)
116 const ASN1_TEMPLATE *tt, *errtt = NULL;
117 const ASN1_COMPAT_FUNCS *cf;
118 const ASN1_EXTERN_FUNCS *ef;
119 const ASN1_AUX *aux = it->funcs;
120 ASN1_aux_cb *asn1_cb;
121 unsigned char *p, *q, imphack = 0, oclass;
122 char seq_eoc, seq_nolen, cst, isopt;
127 ASN1_VALUE *pchval, **pchptr, *ptmpval;
129 if(aux && aux->asn1_cb) asn1_cb = aux->asn1_cb;
134 case ASN1_ITYPE_PRIMITIVE:
136 return asn1_template_ex_d2i(pval, in, len, it->templates, opt, ctx);
137 return asn1_d2i_ex_primitive(pval, in, len, it, tag, aclass, opt, ctx);
140 case ASN1_ITYPE_MSTRING:
142 /* Just read in tag and class */
143 ret = asn1_check_tlen(NULL, &otag, &oclass, NULL, NULL, &p, len, -1, 0, 1, ctx);
145 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
148 /* Must be UNIVERSAL class */
149 if(oclass != V_ASN1_UNIVERSAL) {
150 /* If OPTIONAL, assume this is OK */
152 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_MSTRING_NOT_UNIVERSAL);
155 /* Check tag matches bit map */
156 if(!(ASN1_tag2bit(otag) & it->utype)) {
157 /* If OPTIONAL, assume this is OK */
159 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_MSTRING_WRONG_TAG);
162 return asn1_d2i_ex_primitive(pval, in, len, it, otag, 0, 0, ctx);
164 case ASN1_ITYPE_EXTERN:
165 /* Use new style d2i */
167 return ef->asn1_ex_d2i(pval, in, len, it, tag, aclass, opt, ctx);
169 case ASN1_ITYPE_COMPAT:
170 /* we must resort to old style evil hackery */
173 /* If OPTIONAL see if it is there */
177 if(tag == -1) exptag = it->utype;
179 /* Don't care about anything other than presence of expected tag */
180 ret = asn1_check_tlen(NULL, NULL, NULL, NULL, NULL, &p, len, exptag, aclass, 1, ctx);
182 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
185 if(ret == -1) return -1;
187 /* This is the old style evil hack IMPLICIT handling:
188 * since the underlying code is expecting a tag and
189 * class other than the one present we change the
190 * buffer temporarily then change it back afterwards.
191 * This doesn't and never did work for tags > 30.
193 * Yes this is *horrible* but it is only needed for
194 * old style d2i which will hopefully not be around
196 * FIXME: should copy the buffer then modify it so
197 * the input buffer can be const: we should *always*
198 * copy because the old style d2i might modify the
205 *p = (unsigned char)((*p & V_ASN1_CONSTRUCTED) | it->utype);
208 ptmpval = cf->asn1_d2i(pval, in, len);
210 if(tag != -1) *p = imphack;
212 if(ptmpval) return 1;
213 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
217 case ASN1_ITYPE_CHOICE:
218 if(asn1_cb && !asn1_cb(ASN1_OP_D2I_PRE, pval, it))
220 /* CHOICE type, try each possibility in turn */
223 for(i = 0, tt=it->templates; i < it->tcount; i++, tt++) {
224 /* We mark field as OPTIONAL so its absence
227 ret = asn1_template_ex_d2i(&pchval, &p, len, tt, 1, ctx);
228 /* If field not present, try the next one */
229 if(ret == -1) continue;
230 /* If positive return, read OK, break loop */
232 /* Otherwise must be an ASN1 parsing error */
234 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
237 /* Did we fall off the end without reading anything? */
238 if(i == it->tcount) {
239 /* If OPTIONAL, this is OK */
241 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_NO_MATCHING_CHOICE_TYPE);
244 /* Otherwise we got a match, allocate structure and populate it */
246 if(!ASN1_item_ex_new(pval, it)) {
248 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
252 pchptr = asn1_get_field_ptr(pval, tt);
254 asn1_set_choice_selector(pval, i, it);
256 if(asn1_cb && !asn1_cb(ASN1_OP_D2I_POST, pval, it))
260 case ASN1_ITYPE_SEQUENCE:
264 /* If no IMPLICIT tagging set to SEQUENCE, UNIVERSAL */
266 tag = V_ASN1_SEQUENCE;
267 aclass = V_ASN1_UNIVERSAL;
269 /* Get SEQUENCE length and update len, p */
270 ret = asn1_check_tlen(&len, NULL, NULL, &seq_eoc, &cst, &p, len, tag, aclass, opt, ctx);
272 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
274 } else if(ret == -1) return -1;
275 if(aux && (aux->flags & ASN1_AFLG_BROKEN)) {
276 len = tmplen - (p - *in);
278 } else seq_nolen = seq_eoc; /* If indefinite we don't do a length check */
280 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_SEQUENCE_NOT_CONSTRUCTED);
285 if(!ASN1_item_ex_new(pval, it)) {
286 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
290 if(asn1_cb && !asn1_cb(ASN1_OP_D2I_PRE, pval, it))
293 /* Get each field entry */
294 for(i = 0, tt = it->templates; i < it->tcount; i++, tt++) {
295 const ASN1_TEMPLATE *seqtt;
296 ASN1_VALUE **pseqval;
297 seqtt = asn1_do_adb(pval, tt, 1);
299 pseqval = asn1_get_field_ptr(pval, seqtt);
300 /* Have we ran out of data? */
303 if(asn1_check_eoc(&p, len)) {
305 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_UNEXPECTED_EOC);
313 /* This determines the OPTIONAL flag value. The field cannot
314 * be omitted if it is the last of a SEQUENCE and there is
315 * still data to be read. This isn't strictly necessary but
316 * it increases efficiency in some cases.
318 if(i == (it->tcount - 1)) isopt = 0;
319 else isopt = (char)(seqtt->flags & ASN1_TFLG_OPTIONAL);
320 /* attempt to read in field, allowing each to be OPTIONAL */
321 ret = asn1_template_ex_d2i(pseqval, &p, len, seqtt, isopt, ctx);
325 } else if(ret == -1) {
326 /* OPTIONAL component absent. Free and zero the field
328 ASN1_template_free(pseqval, seqtt);
334 /* Check for EOC if expecting one */
335 if(seq_eoc && !asn1_check_eoc(&p, len)) {
336 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_MISSING_EOC);
339 /* Check all data read */
340 if(!seq_nolen && len) {
341 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_SEQUENCE_LENGTH_MISMATCH);
345 /* If we get here we've got no more data in the SEQUENCE,
346 * however we may not have read all fields so check all
347 * remaining are OPTIONAL and clear any that are.
349 for(; i < it->tcount; tt++, i++) {
350 const ASN1_TEMPLATE *seqtt;
351 seqtt = asn1_do_adb(pval, tt, 1);
353 if(seqtt->flags & ASN1_TFLG_OPTIONAL) {
354 ASN1_VALUE **pseqval;
355 pseqval = asn1_get_field_ptr(pval, seqtt);
356 ASN1_template_free(pseqval, seqtt);
359 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_FIELD_MISSING);
364 if(!asn1_enc_save(pval, *in, p - *in, it)) goto auxerr;
366 if(asn1_cb && !asn1_cb(ASN1_OP_D2I_POST, pval, it))
374 ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_AUX_ERROR);
376 ASN1_item_ex_free(pval, it);
377 if(errtt) ERR_add_error_data(4, "Field=", errtt->field_name, ", Type=", it->sname);
378 else ERR_add_error_data(2, "Type=", it->sname);
382 /* Templates are handled with two separate functions. One handles any EXPLICIT tag and the other handles the
386 int asn1_template_ex_d2i(ASN1_VALUE **val, unsigned char **in, long inlen, const ASN1_TEMPLATE *tt, char opt, ASN1_TLC *ctx)
391 unsigned char *p, *q;
395 aclass = flags & ASN1_TFLG_TAG_CLASS;
399 /* Check if EXPLICIT tag expected */
400 if(flags & ASN1_TFLG_EXPTAG) {
402 /* Need to work out amount of data available to the inner content and where it
403 * starts: so read in EXPLICIT header to get the info.
405 ret = asn1_check_tlen(&len, NULL, NULL, &exp_eoc, &cst, &p, inlen, tt->tag, aclass, opt, ctx);
408 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
410 } else if(ret == -1) return -1;
412 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I, ASN1_R_EXPLICIT_TAG_NOT_CONSTRUCTED);
415 /* We've found the field so it can't be OPTIONAL now */
416 ret = asn1_template_noexp_d2i(val, &p, len, tt, 0, ctx);
418 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
421 /* We read the field in OK so update length */
424 /* If NDEF we must have an EOC here */
425 if(!asn1_check_eoc(&p, len)) {
426 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I, ASN1_R_MISSING_EOC);
430 /* Otherwise we must hit the EXPLICIT tag end or its an error */
432 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I, ASN1_R_EXPLICIT_LENGTH_MISMATCH);
437 return asn1_template_noexp_d2i(val, in, inlen, tt, opt, ctx);
443 ASN1_template_free(val, tt);
448 static int asn1_template_noexp_d2i(ASN1_VALUE **val, unsigned char **in, long len, const ASN1_TEMPLATE *tt, char opt, ASN1_TLC *ctx)
452 unsigned char *p, *q;
455 aclass = flags & ASN1_TFLG_TAG_CLASS;
460 if(flags & ASN1_TFLG_SK_MASK) {
461 /* SET OF, SEQUENCE OF */
464 /* First work out expected inner tag value */
465 if(flags & ASN1_TFLG_IMPTAG) {
469 skaclass = V_ASN1_UNIVERSAL;
470 if(flags & ASN1_TFLG_SET_OF) sktag = V_ASN1_SET;
471 else sktag = V_ASN1_SEQUENCE;
474 ret = asn1_check_tlen(&len, NULL, NULL, &sk_eoc, NULL, &p, len, sktag, skaclass, opt, ctx);
476 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
478 } else if(ret == -1) return -1;
479 if(!*val) *val = (ASN1_VALUE *)sk_new_null();
481 /* We've got a valid STACK: free up any items present */
482 STACK *sktmp = (STACK *)*val;
484 while(sk_num(sktmp) > 0) {
485 vtmp = (ASN1_VALUE *)sk_pop(sktmp);
486 ASN1_item_ex_free(&vtmp, ASN1_ITEM_ptr(tt->item));
491 ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I, ERR_R_MALLOC_FAILURE);
494 /* Read as many items as we can */
498 /* See if EOC found */
499 if(asn1_check_eoc(&p, len)) {
501 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I, ASN1_R_UNEXPECTED_EOC);
509 if(!ASN1_item_ex_d2i(&skfield, &p, len, ASN1_ITEM_ptr(tt->item), -1, 0, 0, ctx)) {
510 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I, ERR_R_NESTED_ASN1_ERROR);
514 if(!sk_push((STACK *)*val, (char *)skfield)) {
515 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I, ERR_R_MALLOC_FAILURE);
520 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I, ASN1_R_MISSING_EOC);
523 } else if(flags & ASN1_TFLG_IMPTAG) {
524 /* IMPLICIT tagging */
525 ret = ASN1_item_ex_d2i(val, &p, len, ASN1_ITEM_ptr(tt->item), tt->tag, aclass, opt, ctx);
527 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I, ERR_R_NESTED_ASN1_ERROR);
529 } else if(ret == -1) return -1;
531 /* Nothing special */
532 ret = ASN1_item_ex_d2i(val, &p, len, ASN1_ITEM_ptr(tt->item), -1, 0, opt, ctx);
534 ASN1err(ASN1_F_ASN1_TEMPLATE_D2I, ERR_R_NESTED_ASN1_ERROR);
536 } else if(ret == -1) return -1;
543 ASN1_template_free(val, tt);
548 static int asn1_d2i_ex_primitive(ASN1_VALUE **pval, unsigned char **in, long inlen,
550 int tag, int aclass, char opt, ASN1_TLC *ctx)
554 char cst, inf, free_cont = 0;
557 unsigned char *cont = NULL;
560 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ASN1_R_ILLEGAL_NULL);
561 return 0; /* Should never happen */
564 if(it->itype == ASN1_ITYPE_MSTRING) {
567 } else utype = it->utype;
569 if(utype == V_ASN1_ANY) {
570 /* If type is ANY need to figure out type from tag */
571 unsigned char oclass;
573 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ASN1_R_ILLEGAL_TAGGED_ANY);
577 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ASN1_R_ILLEGAL_OPTIONAL_ANY);
581 ret = asn1_check_tlen(NULL, &utype, &oclass, NULL, NULL, &p, inlen, -1, 0, 0, ctx);
583 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ERR_R_NESTED_ASN1_ERROR);
586 if(oclass != V_ASN1_UNIVERSAL) utype = V_ASN1_OTHER;
590 aclass = V_ASN1_UNIVERSAL;
594 ret = asn1_check_tlen(&plen, NULL, NULL, &inf, &cst, &p, inlen, tag, aclass, opt, ctx);
596 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ERR_R_NESTED_ASN1_ERROR);
598 } else if(ret == -1) return -1;
599 /* SEQUENCE, SET and "OTHER" are left in encoded form */
600 if((utype == V_ASN1_SEQUENCE) || (utype == V_ASN1_SET) || (utype == V_ASN1_OTHER)) {
601 /* SEQUENCE and SET must be constructed */
602 if((utype != V_ASN1_OTHER) && !cst) {
603 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ASN1_R_TYPE_NOT_CONSTRUCTED);
608 /* If indefinite length constructed find the real end */
610 if(!asn1_collect(NULL, &p, plen, inf, -1, -1)) goto err;
613 len = p - cont + plen;
621 /* Should really check the internal tags are correct but
622 * some things may get this wrong. The relevant specs
623 * say that constructed string types should be OCTET STRINGs
624 * internally irrespective of the type. So instead just check
625 * for UNIVERSAL class and ignore the tag.
627 if(!asn1_collect(&buf, &p, plen, inf, -1, V_ASN1_UNIVERSAL)) goto err;
629 /* Append a final null to string */
630 if(!BUF_MEM_grow(&buf, len + 1)) {
631 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ERR_R_MALLOC_FAILURE);
635 cont = (unsigned char *)buf.data;
643 /* We now have content length and type: translate into a structure */
644 if(!asn1_ex_c2i(pval, cont, len, utype, &free_cont, it)) goto err;
649 if(free_cont && buf.data) OPENSSL_free(buf.data);
653 /* Translate ASN1 content octets into a structure */
655 int asn1_ex_c2i(ASN1_VALUE **pval, unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it)
658 ASN1_TYPE *typ = NULL;
660 const ASN1_PRIMITIVE_FUNCS *pf;
663 if(pf && pf->prim_c2i) return pf->prim_c2i(pval, cont, len, utype, free_cont, it);
664 /* If ANY type clear type and set pointer to internal value */
665 if(it->utype == V_ASN1_ANY) {
667 typ = ASN1_TYPE_new();
668 *pval = (ASN1_VALUE *)typ;
669 } else typ = (ASN1_TYPE *)*pval;
670 if(utype != typ->type) ASN1_TYPE_set(typ, utype, NULL);
671 pval = (ASN1_VALUE **)&typ->value.ptr;
675 if(!c2i_ASN1_OBJECT((ASN1_OBJECT **)pval, &cont, len)) goto err;
680 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ASN1_R_NULL_IS_WRONG_LENGTH);
683 *pval = (ASN1_VALUE *)1;
688 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ASN1_R_BOOLEAN_IS_WRONG_LENGTH);
692 tbool = (ASN1_BOOLEAN *)pval;
697 case V_ASN1_BIT_STRING:
698 if(!c2i_ASN1_BIT_STRING((ASN1_BIT_STRING **)pval, &cont, len)) goto err;
702 case V_ASN1_NEG_INTEGER:
703 case V_ASN1_ENUMERATED:
704 case V_ASN1_NEG_ENUMERATED:
705 tint = (ASN1_INTEGER **)pval;
706 if(!c2i_ASN1_INTEGER(tint, &cont, len)) goto err;
707 /* Fixup type to match the expected form */
708 (*tint)->type = utype | ((*tint)->type & V_ASN1_NEG);
711 case V_ASN1_OCTET_STRING:
712 case V_ASN1_NUMERICSTRING:
713 case V_ASN1_PRINTABLESTRING:
714 case V_ASN1_T61STRING:
715 case V_ASN1_VIDEOTEXSTRING:
716 case V_ASN1_IA5STRING:
718 case V_ASN1_GENERALIZEDTIME:
719 case V_ASN1_GRAPHICSTRING:
720 case V_ASN1_VISIBLESTRING:
721 case V_ASN1_GENERALSTRING:
722 case V_ASN1_UNIVERSALSTRING:
723 case V_ASN1_BMPSTRING:
724 case V_ASN1_UTF8STRING:
727 case V_ASN1_SEQUENCE:
729 /* All based on ASN1_STRING and handled the same */
731 stmp = ASN1_STRING_type_new(utype);
733 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ERR_R_MALLOC_FAILURE);
736 *pval = (ASN1_VALUE *)stmp;
738 stmp = (ASN1_STRING *)*pval;
741 /* If we've already allocated a buffer use it */
743 if(stmp->data) OPENSSL_free(stmp->data);
748 if(!ASN1_STRING_set(stmp, cont, len)) {
749 ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ERR_R_MALLOC_FAILURE);
750 ASN1_STRING_free(stmp);
757 /* If ASN1_ANY and NULL type fix up value */
758 if(typ && utype==V_ASN1_NULL) typ->value.ptr = NULL;
762 if(!ret) ASN1_TYPE_free(typ);
766 /* This function collects the asn1 data from a constructred string
767 * type into a buffer. The values of 'in' and 'len' should refer
768 * to the contents of the constructed type and 'inf' should be set
769 * if it is indefinite length. If 'buf' is NULL then we just want
770 * to find the end of the current structure: useful for indefinite
771 * length constructed stuff.
774 static int asn1_collect(BUF_MEM *buf, unsigned char **in, long len, char inf, int tag, int aclass)
776 unsigned char *p, *q;
781 /* If no buffer and not indefinite length constructed just pass over the encoded data */
789 if(asn1_check_eoc(&p, len)) {
790 /* EOC is illegal outside indefinite length constructed form */
792 ASN1err(ASN1_F_ASN1_COLLECT, ASN1_R_UNEXPECTED_EOC);
798 if(!asn1_check_tlen(&plen, NULL, NULL, &ininf, &cst, &p, len, tag, aclass, 0, NULL)) {
799 ASN1err(ASN1_F_ASN1_COLLECT, ERR_R_NESTED_ASN1_ERROR);
802 /* If indefinite length constructed update max length */
804 if(!asn1_collect(buf, &p, plen, ininf, tag, aclass)) return 0;
806 if(!collect_data(buf, &p, plen)) return 0;
811 ASN1err(ASN1_F_ASN1_COLLECT, ASN1_R_MISSING_EOC);
818 static int collect_data(BUF_MEM *buf, unsigned char **p, long plen)
823 if(!BUF_MEM_grow(buf, len + plen)) {
824 ASN1err(ASN1_F_COLLECT_DATA, ERR_R_MALLOC_FAILURE);
827 memcpy(buf->data + len, *p, plen);
833 /* Check for ASN1 EOC and swallow it if found */
835 static int asn1_check_eoc(unsigned char **in, long len)
838 if(len < 2) return 0;
847 /* Check an ASN1 tag and length: a bit like ASN1_get_object
848 * but it sets the length for indefinite length constructed
849 * form, we don't know the exact length but we can set an
850 * upper bound to the amount of data available minus the
851 * header length just read.
854 static int asn1_check_tlen(long *olen, int *otag, unsigned char *oclass, char *inf, char *cst,
855 unsigned char **in, long len, int exptag, int expclass, char opt, ASN1_TLC *ctx)
860 unsigned char *p, *q;
864 if(ctx && ctx->valid) {
867 pclass = ctx->pclass;
871 i = ASN1_get_object(&p, &plen, &ptag, &pclass, len);
875 ctx->pclass = pclass;
879 /* If definite length, length + header can't exceed total
880 * amount of data available.
882 if(!(i & 1) && ((plen + ctx->hdrlen) > len)) {
883 ASN1err(ASN1_F_ASN1_CHECK_TLEN, ASN1_R_TOO_LONG);
891 ASN1err(ASN1_F_ASN1_CHECK_TLEN, ASN1_R_BAD_OBJECT_HEADER);
896 if((exptag != ptag) || (expclass != pclass)) {
897 /* If type is OPTIONAL, not an error, but indicate missing
902 ASN1err(ASN1_F_ASN1_CHECK_TLEN, ASN1_R_WRONG_TAG);
905 /* We have a tag and class match, so assume we are going to do something with it */
909 if(i & 1) plen = len - (p - q);
911 if(inf) *inf = i & 1;
913 if(cst) *cst = i & V_ASN1_CONSTRUCTED;
915 if(olen) *olen = plen;
916 if(oclass) *oclass = pclass;
917 if(otag) *otag = ptag;