3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
6 /* ====================================================================
7 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
61 #include <openssl/asn1.h>
62 #include <openssl/asn1t.h>
63 #include <openssl/objects.h>
66 /* Free up an ASN1 structure */
68 void ASN1_item_free(ASN1_VALUE *val, const ASN1_ITEM *it)
70 asn1_item_combine_free(&val, it, 0);
73 void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
75 asn1_item_combine_free(pval, it, 0);
78 void asn1_item_combine_free(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine)
80 const ASN1_TEMPLATE *tt = NULL, *seqtt;
81 const ASN1_EXTERN_FUNCS *ef;
82 const ASN1_COMPAT_FUNCS *cf;
83 const ASN1_AUX *aux = it->funcs;
88 if ((it->itype != ASN1_ITYPE_PRIMITIVE) && !*pval)
90 if (aux && aux->asn1_cb)
91 asn1_cb = aux->asn1_cb;
97 case ASN1_ITYPE_PRIMITIVE:
99 ASN1_template_free(pval, it->templates);
101 ASN1_primitive_free(pval, it);
104 case ASN1_ITYPE_MSTRING:
105 ASN1_primitive_free(pval, it);
108 case ASN1_ITYPE_CHOICE:
110 i = asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL);
114 i = asn1_get_choice_selector(pval, it);
115 if ((i >= 0) && (i < it->tcount)) {
117 tt = it->templates + i;
118 pchval = asn1_get_field_ptr(pval, tt);
119 ASN1_template_free(pchval, tt);
122 asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL);
129 case ASN1_ITYPE_COMPAT:
131 if (cf && cf->asn1_free)
132 cf->asn1_free(*pval);
135 case ASN1_ITYPE_EXTERN:
137 if (ef && ef->asn1_ex_free)
138 ef->asn1_ex_free(pval, it);
141 case ASN1_ITYPE_NDEF_SEQUENCE:
142 case ASN1_ITYPE_SEQUENCE:
143 if (asn1_do_lock(pval, -1, it) > 0)
146 i = asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL);
150 asn1_enc_free(pval, it);
152 * If we free up as normal we will invalidate any ANY DEFINED BY
153 * field and we wont be able to determine the type of the field it
154 * defines. So free up in reverse order.
156 tt = it->templates + it->tcount - 1;
157 for (i = 0; i < it->tcount; tt--, i++) {
158 ASN1_VALUE **pseqval;
159 seqtt = asn1_do_adb(pval, tt, 0);
162 pseqval = asn1_get_field_ptr(pval, seqtt);
163 ASN1_template_free(pseqval, seqtt);
166 asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL);
175 void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
178 if (tt->flags & ASN1_TFLG_SK_MASK) {
179 STACK_OF(ASN1_VALUE) *sk = (STACK_OF(ASN1_VALUE) *)*pval;
180 for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) {
182 vtmp = sk_ASN1_VALUE_value(sk, i);
183 asn1_item_combine_free(&vtmp, ASN1_ITEM_ptr(tt->item), 0);
185 sk_ASN1_VALUE_free(sk);
188 asn1_item_combine_free(pval, ASN1_ITEM_ptr(tt->item),
189 tt->flags & ASN1_TFLG_COMBINE);
192 void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
196 const ASN1_PRIMITIVE_FUNCS *pf;
198 if (pf && pf->prim_free) {
199 pf->prim_free(pval, it);
203 /* Special case: if 'it' is NULL free contents of ASN1_TYPE */
205 ASN1_TYPE *typ = (ASN1_TYPE *)*pval;
207 pval = &typ->value.asn1_value;
210 } else if (it->itype == ASN1_ITYPE_MSTRING) {
216 if ((utype != V_ASN1_BOOLEAN) && !*pval)
222 ASN1_OBJECT_free((ASN1_OBJECT *)*pval);
227 *(ASN1_BOOLEAN *)pval = it->size;
229 *(ASN1_BOOLEAN *)pval = -1;
236 ASN1_primitive_free(pval, NULL);
241 ASN1_STRING_free((ASN1_STRING *)*pval);