2 * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include <openssl/asn1.h>
12 #include <openssl/asn1t.h>
13 #include <openssl/objects.h>
14 #include "asn1_locl.h"
16 static void asn1_item_embed_free(ASN1_VALUE **pval, const ASN1_ITEM *it,
19 /* Free up an ASN1 structure */
21 void ASN1_item_free(ASN1_VALUE *val, const ASN1_ITEM *it)
23 asn1_item_embed_free(&val, it, 0);
26 void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
28 asn1_item_embed_free(pval, it, 0);
31 static void asn1_item_embed_free(ASN1_VALUE **pval, const ASN1_ITEM *it,
34 const ASN1_TEMPLATE *tt = NULL, *seqtt;
35 const ASN1_EXTERN_FUNCS *ef;
36 const ASN1_AUX *aux = it->funcs;
42 if ((it->itype != ASN1_ITYPE_PRIMITIVE) && !*pval)
44 if (aux && aux->asn1_cb)
45 asn1_cb = aux->asn1_cb;
51 case ASN1_ITYPE_PRIMITIVE:
53 asn1_template_free(pval, it->templates);
55 asn1_primitive_free(pval, it, embed);
58 case ASN1_ITYPE_MSTRING:
59 asn1_primitive_free(pval, it, embed);
62 case ASN1_ITYPE_CHOICE:
64 i = asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL);
68 i = asn1_get_choice_selector(pval, it);
69 if ((i >= 0) && (i < it->tcount)) {
72 tt = it->templates + i;
73 pchval = asn1_get_field_ptr(pval, tt);
74 asn1_template_free(pchval, tt);
77 asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL);
84 case ASN1_ITYPE_EXTERN:
86 if (ef && ef->asn1_ex_free)
87 ef->asn1_ex_free(pval, it);
90 case ASN1_ITYPE_NDEF_SEQUENCE:
91 case ASN1_ITYPE_SEQUENCE:
92 if (asn1_do_lock(pval, -1, it) != 0) /* if error or ref-counter > 0 */
95 i = asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL);
99 asn1_enc_free(pval, it);
101 * If we free up as normal we will invalidate any ANY DEFINED BY
102 * field and we won't be able to determine the type of the field it
103 * defines. So free up in reverse order.
105 tt = it->templates + it->tcount;
106 for (i = 0; i < it->tcount; i++) {
107 ASN1_VALUE **pseqval;
110 seqtt = asn1_do_adb(pval, tt, 0);
113 pseqval = asn1_get_field_ptr(pval, seqtt);
114 asn1_template_free(pseqval, seqtt);
117 asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL);
126 void asn1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
128 int embed = tt->flags & ASN1_TFLG_EMBED;
131 tval = (ASN1_VALUE *)pval;
134 if (tt->flags & ASN1_TFLG_SK_MASK) {
135 STACK_OF(ASN1_VALUE) *sk = (STACK_OF(ASN1_VALUE) *)*pval;
138 for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) {
139 ASN1_VALUE *vtmp = sk_ASN1_VALUE_value(sk, i);
141 asn1_item_embed_free(&vtmp, ASN1_ITEM_ptr(tt->item), embed);
143 sk_ASN1_VALUE_free(sk);
146 asn1_item_embed_free(pval, ASN1_ITEM_ptr(tt->item), embed);
150 void asn1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it, int embed)
154 /* Special case: if 'it' is a primitive with a free_func, use that. */
156 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
158 if (pf && pf->prim_free) {
159 pf->prim_free(pval, it);
164 /* Special case: if 'it' is NULL, free contents of ASN1_TYPE */
166 ASN1_TYPE *typ = (ASN1_TYPE *)*pval;
169 pval = &typ->value.asn1_value;
172 } else if (it->itype == ASN1_ITYPE_MSTRING) {
178 if ((utype != V_ASN1_BOOLEAN) && !*pval)
184 ASN1_OBJECT_free((ASN1_OBJECT *)*pval);
189 *(ASN1_BOOLEAN *)pval = it->size;
191 *(ASN1_BOOLEAN *)pval = -1;
198 asn1_primitive_free(pval, NULL, 0);
203 asn1_string_embed_free((ASN1_STRING *)*pval, embed);