--- /dev/null
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.] */
+
+#include <openssl/asn1.h>
+
+#include <openssl/asn1t.h>
+#include <openssl/mem.h>
+
+#include "asn1_locl.h"
+
+/* Free up an ASN1 structure */
+
+void ASN1_item_free(ASN1_VALUE *val, const ASN1_ITEM *it)
+{
+ asn1_item_combine_free(&val, it, 0);
+}
+
+void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
+{
+ asn1_item_combine_free(pval, it, 0);
+}
+
+void asn1_item_combine_free(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine)
+{
+ const ASN1_TEMPLATE *tt = NULL, *seqtt;
+ const ASN1_EXTERN_FUNCS *ef;
+ const ASN1_COMPAT_FUNCS *cf;
+ const ASN1_AUX *aux = it->funcs;
+ ASN1_aux_cb *asn1_cb;
+ int i;
+ if (!pval)
+ return;
+ if ((it->itype != ASN1_ITYPE_PRIMITIVE) && !*pval)
+ return;
+ if (aux && aux->asn1_cb)
+ asn1_cb = aux->asn1_cb;
+ else
+ asn1_cb = 0;
+
+ switch (it->itype) {
+
+ case ASN1_ITYPE_PRIMITIVE:
+ if (it->templates)
+ ASN1_template_free(pval, it->templates);
+ else
+ ASN1_primitive_free(pval, it);
+ break;
+
+ case ASN1_ITYPE_MSTRING:
+ ASN1_primitive_free(pval, it);
+ break;
+
+ case ASN1_ITYPE_CHOICE:
+ if (asn1_cb) {
+ i = asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL);
+ if (i == 2)
+ return;
+ }
+ i = asn1_get_choice_selector(pval, it);
+ if ((i >= 0) && (i < it->tcount)) {
+ ASN1_VALUE **pchval;
+ tt = it->templates + i;
+ pchval = asn1_get_field_ptr(pval, tt);
+ ASN1_template_free(pchval, tt);
+ }
+ if (asn1_cb)
+ asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL);
+ if (!combine) {
+ OPENSSL_free(*pval);
+ *pval = NULL;
+ }
+ break;
+
+ case ASN1_ITYPE_COMPAT:
+ cf = it->funcs;
+ if (cf && cf->asn1_free)
+ cf->asn1_free(*pval);
+ break;
+
+ case ASN1_ITYPE_EXTERN:
+ ef = it->funcs;
+ if (ef && ef->asn1_ex_free)
+ ef->asn1_ex_free(pval, it);
+ break;
+
+ case ASN1_ITYPE_NDEF_SEQUENCE:
+ case ASN1_ITYPE_SEQUENCE:
+ if (!asn1_refcount_dec_and_test_zero(pval, it))
+ return;
+ if (asn1_cb) {
+ i = asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL);
+ if (i == 2)
+ return;
+ }
+ asn1_enc_free(pval, it);
+ /*
+ * If we free up as normal we will invalidate any ANY DEFINED BY
+ * field and we wont be able to determine the type of the field it
+ * defines. So free up in reverse order.
+ */
+ tt = it->templates + it->tcount - 1;
+ for (i = 0; i < it->tcount; tt--, i++) {
+ ASN1_VALUE **pseqval;
+ seqtt = asn1_do_adb(pval, tt, 0);
+ if (!seqtt)
+ continue;
+ pseqval = asn1_get_field_ptr(pval, seqtt);
+ ASN1_template_free(pseqval, seqtt);
+ }
+ if (asn1_cb)
+ asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL);
+ if (!combine) {
+ OPENSSL_free(*pval);
+ *pval = NULL;
+ }
+ break;
+ }
+}
+
+void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
+{
+ size_t i;
+ if (tt->flags & ASN1_TFLG_SK_MASK) {
+ STACK_OF(ASN1_VALUE) *sk = (STACK_OF(ASN1_VALUE) *)*pval;
+ for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) {
+ ASN1_VALUE *vtmp;
+ vtmp = sk_ASN1_VALUE_value(sk, i);
+ asn1_item_combine_free(&vtmp, ASN1_ITEM_ptr(tt->item), 0);
+ }
+ sk_ASN1_VALUE_free(sk);
+ *pval = NULL;
+ } else
+ asn1_item_combine_free(pval, ASN1_ITEM_ptr(tt->item),
+ tt->flags & ASN1_TFLG_COMBINE);
+}
+
+void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
+{
+ int utype;
+ if (it) {
+ const ASN1_PRIMITIVE_FUNCS *pf;
+ pf = it->funcs;
+ if (pf && pf->prim_free) {
+ pf->prim_free(pval, it);
+ return;
+ }
+ }
+ /* Special case: if 'it' is NULL free contents of ASN1_TYPE */
+ if (!it) {
+ ASN1_TYPE *typ = (ASN1_TYPE *)*pval;
+ utype = typ->type;
+ pval = &typ->value.asn1_value;
+ if (!*pval)
+ return;
+ } else if (it->itype == ASN1_ITYPE_MSTRING) {
+ utype = -1;
+ if (!*pval)
+ return;
+ } else {
+ utype = it->utype;
+ if ((utype != V_ASN1_BOOLEAN) && !*pval)
+ return;
+ }
+
+ switch (utype) {
+ case V_ASN1_OBJECT:
+ ASN1_OBJECT_free((ASN1_OBJECT *)*pval);
+ break;
+
+ case V_ASN1_BOOLEAN:
+ if (it)
+ *(ASN1_BOOLEAN *)pval = it->size;
+ else
+ *(ASN1_BOOLEAN *)pval = -1;
+ return;
+
+ case V_ASN1_NULL:
+ break;
+
+ case V_ASN1_ANY:
+ ASN1_primitive_free(pval, NULL);
+ OPENSSL_free(*pval);
+ break;
+
+ default:
+ ASN1_STRING_free((ASN1_STRING *)*pval);
+ *pval = NULL;
+ break;
+ }
+ *pval = NULL;
+}
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