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