2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
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).
60 #include <openssl/asn1.h>
61 #include <openssl/asn1t.h>
62 #include <openssl/objects.h>
63 #include "asn1_locl.h"
65 static void asn1_item_embed_free(ASN1_VALUE **pval, const ASN1_ITEM *it,
68 /* Free up an ASN1 structure */
70 void ASN1_item_free(ASN1_VALUE *val, const ASN1_ITEM *it)
72 asn1_item_embed_free(&val, it, 0);
75 void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
77 asn1_item_embed_free(pval, it, 0);
80 static void asn1_item_embed_free(ASN1_VALUE **pval, const ASN1_ITEM *it,
83 const ASN1_TEMPLATE *tt = NULL, *seqtt;
84 const ASN1_EXTERN_FUNCS *ef;
85 const ASN1_AUX *aux = it->funcs;
91 if ((it->itype != ASN1_ITYPE_PRIMITIVE) && !*pval)
93 if (aux && aux->asn1_cb)
94 asn1_cb = aux->asn1_cb;
100 case ASN1_ITYPE_PRIMITIVE:
102 asn1_template_free(pval, it->templates);
104 asn1_primitive_free(pval, it);
107 case ASN1_ITYPE_MSTRING:
108 asn1_primitive_free(pval, it);
111 case ASN1_ITYPE_CHOICE:
113 i = asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL);
117 i = asn1_get_choice_selector(pval, it);
118 if ((i >= 0) && (i < it->tcount)) {
121 tt = it->templates + i;
122 pchval = asn1_get_field_ptr(pval, tt);
123 asn1_template_free(pchval, tt);
126 asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL);
133 case ASN1_ITYPE_EXTERN:
135 if (ef && ef->asn1_ex_free)
136 ef->asn1_ex_free(pval, it);
139 case ASN1_ITYPE_NDEF_SEQUENCE:
140 case ASN1_ITYPE_SEQUENCE:
141 if (asn1_do_lock(pval, -1, it) > 0)
144 i = asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL);
148 asn1_enc_free(pval, it);
150 * If we free up as normal we will invalidate any ANY DEFINED BY
151 * field and we wont be able to determine the type of the field it
152 * defines. So free up in reverse order.
154 tt = it->templates + it->tcount - 1;
155 for (i = 0; i < it->tcount; tt--, i++) {
156 ASN1_VALUE **pseqval;
157 seqtt = asn1_do_adb(pval, tt, 0);
160 pseqval = asn1_get_field_ptr(pval, seqtt);
161 asn1_template_free(pseqval, seqtt);
164 asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL);
173 void asn1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
175 int embed = tt->flags & ASN1_TFLG_EMBED;
178 tval = (ASN1_VALUE *)pval;
181 if (tt->flags & ASN1_TFLG_SK_MASK) {
182 STACK_OF(ASN1_VALUE) *sk = (STACK_OF(ASN1_VALUE) *)*pval;
185 for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) {
186 ASN1_VALUE *vtmp = sk_ASN1_VALUE_value(sk, i);
188 asn1_item_embed_free(&vtmp, ASN1_ITEM_ptr(tt->item), embed);
190 sk_ASN1_VALUE_free(sk);
193 asn1_item_embed_free(pval, ASN1_ITEM_ptr(tt->item), embed);
197 void asn1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
201 /* Special case: if 'it' is a primitive with a free_func, use that. */
203 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
205 if (pf && pf->prim_free) {
206 pf->prim_free(pval, it);
211 /* Special case: if 'it' is NULL, free contents of ASN1_TYPE */
213 ASN1_TYPE *typ = (ASN1_TYPE *)*pval;
216 pval = &typ->value.asn1_value;
219 } else if (it->itype == ASN1_ITYPE_MSTRING) {
225 if ((utype != V_ASN1_BOOLEAN) && !*pval)
231 ASN1_OBJECT_free((ASN1_OBJECT *)*pval);
236 *(ASN1_BOOLEAN *)pval = it->size;
238 *(ASN1_BOOLEAN *)pval = -1;
245 asn1_primitive_free(pval, NULL);
250 ASN1_STRING_free((ASN1_STRING *)*pval);