1 /* $OpenBSD: tasn_fre.c,v 1.15 2016/12/30 16:04:34 jsing Exp $ */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) 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).
61 #include <openssl/asn1.h>
62 #include <openssl/asn1t.h>
63 #include <openssl/objects.h>
65 static void asn1_item_combine_free(ASN1_VALUE
**pval
, const ASN1_ITEM
*it
,
68 /* Free up an ASN1 structure */
71 ASN1_item_free(ASN1_VALUE
*val
, const ASN1_ITEM
*it
)
73 asn1_item_combine_free(&val
, it
, 0);
77 ASN1_item_ex_free(ASN1_VALUE
**pval
, const ASN1_ITEM
*it
)
79 asn1_item_combine_free(pval
, it
, 0);
83 asn1_item_combine_free(ASN1_VALUE
**pval
, const ASN1_ITEM
*it
, int combine
)
85 const ASN1_TEMPLATE
*tt
= NULL
, *seqtt
;
86 const ASN1_EXTERN_FUNCS
*ef
;
87 const ASN1_AUX
*aux
= it
->funcs
;
88 ASN1_aux_cb
*asn1_cb
= NULL
;
91 if (pval
== NULL
|| *pval
== NULL
)
94 if (aux
!= NULL
&& aux
->asn1_cb
!= NULL
)
95 asn1_cb
= aux
->asn1_cb
;
98 case ASN1_ITYPE_PRIMITIVE
:
100 ASN1_template_free(pval
, it
->templates
);
102 ASN1_primitive_free(pval
, it
);
105 case ASN1_ITYPE_MSTRING
:
106 ASN1_primitive_free(pval
, it
);
109 case ASN1_ITYPE_CHOICE
:
111 i
= asn1_cb(ASN1_OP_FREE_PRE
, pval
, it
, NULL
);
115 i
= asn1_get_choice_selector(pval
, it
);
116 if ((i
>= 0) && (i
< it
->tcount
)) {
118 tt
= it
->templates
+ i
;
119 pchval
= asn1_get_field_ptr(pval
, tt
);
120 ASN1_template_free(pchval
, tt
);
123 asn1_cb(ASN1_OP_FREE_POST
, pval
, it
, NULL
);
130 case ASN1_ITYPE_EXTERN
:
132 if (ef
&& ef
->asn1_ex_free
)
133 ef
->asn1_ex_free(pval
, it
);
136 case ASN1_ITYPE_NDEF_SEQUENCE
:
137 case ASN1_ITYPE_SEQUENCE
:
138 if (asn1_do_lock(pval
, -1, it
) > 0)
141 i
= asn1_cb(ASN1_OP_FREE_PRE
, pval
, it
, NULL
);
145 asn1_enc_free(pval
, it
);
146 /* If we free up as normal we will invalidate any
147 * ANY DEFINED BY field and we wont be able to
148 * determine the type of the field it defines. So
149 * free up in reverse order.
151 tt
= it
->templates
+ it
->tcount
- 1;
152 for (i
= 0; i
< it
->tcount
; tt
--, i
++) {
153 ASN1_VALUE
**pseqval
;
154 seqtt
= asn1_do_adb(pval
, tt
, 0);
157 pseqval
= asn1_get_field_ptr(pval
, seqtt
);
158 ASN1_template_free(pseqval
, seqtt
);
161 asn1_cb(ASN1_OP_FREE_POST
, pval
, it
, NULL
);
171 ASN1_template_free(ASN1_VALUE
**pval
, const ASN1_TEMPLATE
*tt
)
174 if (tt
->flags
& ASN1_TFLG_SK_MASK
) {
175 STACK_OF(ASN1_VALUE
) *sk
= (STACK_OF(ASN1_VALUE
) *)*pval
;
176 for (i
= 0; i
< sk_ASN1_VALUE_num(sk
); i
++) {
178 vtmp
= sk_ASN1_VALUE_value(sk
, i
);
179 asn1_item_combine_free(&vtmp
, tt
->item
,
182 sk_ASN1_VALUE_free(sk
);
185 asn1_item_combine_free(pval
, tt
->item
,
186 tt
->flags
& ASN1_TFLG_COMBINE
);
190 ASN1_primitive_free(ASN1_VALUE
**pval
, const ASN1_ITEM
*it
)
194 const ASN1_PRIMITIVE_FUNCS
*pf
;
196 if (pf
&& pf
->prim_free
) {
197 pf
->prim_free(pval
, it
);
201 /* Special case: if 'it' is NULL free contents of ASN1_TYPE */
203 ASN1_TYPE
*typ
= (ASN1_TYPE
*)*pval
;
205 pval
= &typ
->value
.asn1_value
;
208 } else if (it
->itype
== ASN1_ITYPE_MSTRING
) {
214 if ((utype
!= V_ASN1_BOOLEAN
) && !*pval
)
220 ASN1_OBJECT_free((ASN1_OBJECT
*)*pval
);
225 *(ASN1_BOOLEAN
*)pval
= it
->size
;
227 *(ASN1_BOOLEAN
*)pval
= -1;
234 ASN1_primitive_free(pval
, NULL
);
239 ASN1_STRING_free((ASN1_STRING
*)*pval
);