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>
65 static void asn1_item_combine_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_combine_free(&val, it, 0);
75 void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
77 asn1_item_combine_free(pval, it, 0);
80 static void asn1_item_combine_free(ASN1_VALUE **pval, const ASN1_ITEM *it,
83 const ASN1_TEMPLATE *tt = NULL, *seqtt;
84 const ASN1_EXTERN_FUNCS *ef;
85 const ASN1_COMPAT_FUNCS *cf;
86 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)) {
120 tt = it->templates + i;
121 pchval = asn1_get_field_ptr(pval, tt);
122 ASN1_template_free(pchval, tt);
125 asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL);
132 case ASN1_ITYPE_COMPAT:
134 if (cf && cf->asn1_free)
135 cf->asn1_free(*pval);
138 case ASN1_ITYPE_EXTERN:
140 if (ef && ef->asn1_ex_free)
141 ef->asn1_ex_free(pval, it);
144 case ASN1_ITYPE_NDEF_SEQUENCE:
145 case ASN1_ITYPE_SEQUENCE:
146 if (asn1_do_lock(pval, -1, it) > 0)
149 i = asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL);
153 asn1_enc_free(pval, it);
155 * If we free up as normal we will invalidate any ANY DEFINED BY
156 * field and we wont be able to determine the type of the field it
157 * defines. So free up in reverse order.
159 tt = it->templates + it->tcount - 1;
160 for (i = 0; i < it->tcount; tt--, i++) {
161 ASN1_VALUE **pseqval;
162 seqtt = asn1_do_adb(pval, tt, 0);
165 pseqval = asn1_get_field_ptr(pval, seqtt);
166 ASN1_template_free(pseqval, seqtt);
169 asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL);
178 void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
181 if (tt->flags & ASN1_TFLG_SK_MASK) {
182 STACK_OF(ASN1_VALUE) *sk = (STACK_OF(ASN1_VALUE) *)*pval;
183 for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) {
185 vtmp = sk_ASN1_VALUE_value(sk, i);
186 asn1_item_combine_free(&vtmp, ASN1_ITEM_ptr(tt->item), 0);
188 sk_ASN1_VALUE_free(sk);
191 asn1_item_combine_free(pval, ASN1_ITEM_ptr(tt->item),
192 tt->flags & ASN1_TFLG_COMBINE);
195 void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
199 const ASN1_PRIMITIVE_FUNCS *pf;
201 if (pf && pf->prim_free) {
202 pf->prim_free(pval, it);
206 /* Special case: if 'it' is NULL free contents of ASN1_TYPE */
208 ASN1_TYPE *typ = (ASN1_TYPE *)*pval;
210 pval = &typ->value.asn1_value;
213 } else if (it->itype == ASN1_ITYPE_MSTRING) {
219 if ((utype != V_ASN1_BOOLEAN) && !*pval)
225 ASN1_OBJECT_free((ASN1_OBJECT *)*pval);
230 *(ASN1_BOOLEAN *)pval = it->size;
232 *(ASN1_BOOLEAN *)pval = -1;
239 ASN1_primitive_free(pval, NULL);
244 ASN1_STRING_free((ASN1_STRING *)*pval);