348 lines
8.8 KiB
C
348 lines
8.8 KiB
C
/* tasn_new.c */
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/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
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* project 2000.
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*/
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/* ====================================================================
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* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
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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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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stddef.h>
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#include <openssl/asn1.h>
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#include <openssl/objects.h>
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#include <openssl/err.h>
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#include <openssl/asn1t.h>
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#include <string.h>
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static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine);
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static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
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static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
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void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
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ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it)
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{
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ASN1_VALUE *ret = NULL;
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if(ASN1_item_ex_new(&ret, it) > 0) return ret;
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return NULL;
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}
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/* Allocate an ASN1 structure */
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int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
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{
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return asn1_item_ex_combine_new(pval, it, 0);
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}
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static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine)
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{
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const ASN1_TEMPLATE *tt = NULL;
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const ASN1_COMPAT_FUNCS *cf;
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const ASN1_EXTERN_FUNCS *ef;
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const ASN1_AUX *aux = it->funcs;
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ASN1_aux_cb *asn1_cb;
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ASN1_VALUE **pseqval;
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int i;
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if(aux && aux->asn1_cb) asn1_cb = aux->asn1_cb;
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else asn1_cb = 0;
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if(!combine) *pval = NULL;
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#ifdef CRYPTO_MDEBUG
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if(it->sname) CRYPTO_push_info(it->sname);
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#endif
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switch(it->itype) {
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case ASN1_ITYPE_EXTERN:
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ef = it->funcs;
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if(ef && ef->asn1_ex_new) {
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if(!ef->asn1_ex_new(pval, it))
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goto memerr;
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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_new) {
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*pval = cf->asn1_new();
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if(!*pval) goto memerr;
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}
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break;
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case ASN1_ITYPE_PRIMITIVE:
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if(it->templates) {
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if(!ASN1_template_new(pval, it->templates))
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goto memerr;
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} else {
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if(!ASN1_primitive_new(pval, it))
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goto memerr;
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}
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break;
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case ASN1_ITYPE_MSTRING:
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if(!ASN1_primitive_new(pval, it))
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goto memerr;
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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_NEW_PRE, pval, it);
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if(!i) goto auxerr;
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if(i==2) {
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#ifdef CRYPTO_MDEBUG
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if(it->sname) CRYPTO_pop_info();
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#endif
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return 1;
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}
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}
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if(!combine) {
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*pval = OPENSSL_malloc(it->size);
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if(!*pval) goto memerr;
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memset(*pval, 0, it->size);
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}
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asn1_set_choice_selector(pval, -1, it);
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if(asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
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goto auxerr;
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break;
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case ASN1_ITYPE_SEQUENCE:
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if(asn1_cb) {
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i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
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if(!i) goto auxerr;
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if(i==2) {
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#ifdef CRYPTO_MDEBUG
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if(it->sname) CRYPTO_pop_info();
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#endif
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return 1;
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}
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}
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if(!combine) {
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*pval = OPENSSL_malloc(it->size);
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if(!*pval) goto memerr;
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memset(*pval, 0, it->size);
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asn1_do_lock(pval, 0, it);
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asn1_enc_init(pval, it);
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}
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for(i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
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pseqval = asn1_get_field_ptr(pval, tt);
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if(!ASN1_template_new(pseqval, tt)) goto memerr;
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}
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if(asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
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goto auxerr;
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break;
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}
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#ifdef CRYPTO_MDEBUG
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if(it->sname) CRYPTO_pop_info();
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#endif
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return 1;
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memerr:
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ASN1err(ASN1_F_ASN1_ITEM_NEW, ERR_R_MALLOC_FAILURE);
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#ifdef CRYPTO_MDEBUG
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if(it->sname) CRYPTO_pop_info();
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#endif
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return 0;
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auxerr:
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ASN1err(ASN1_F_ASN1_ITEM_NEW, ASN1_R_AUX_ERROR);
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ASN1_item_ex_free(pval, it);
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#ifdef CRYPTO_MDEBUG
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if(it->sname) CRYPTO_pop_info();
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#endif
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return 0;
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}
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static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
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{
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const ASN1_EXTERN_FUNCS *ef;
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switch(it->itype) {
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case ASN1_ITYPE_EXTERN:
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ef = it->funcs;
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if(ef && ef->asn1_ex_clear)
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ef->asn1_ex_clear(pval, it);
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else *pval = NULL;
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break;
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case ASN1_ITYPE_PRIMITIVE:
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if(it->templates)
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asn1_template_clear(pval, it->templates);
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else
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asn1_primitive_clear(pval, it);
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break;
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case ASN1_ITYPE_MSTRING:
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asn1_primitive_clear(pval, it);
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break;
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case ASN1_ITYPE_COMPAT:
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case ASN1_ITYPE_CHOICE:
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case ASN1_ITYPE_SEQUENCE:
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*pval = NULL;
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break;
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}
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}
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int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
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{
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const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
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int ret;
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if(tt->flags & ASN1_TFLG_OPTIONAL) {
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asn1_template_clear(pval, tt);
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return 1;
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}
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/* If ANY DEFINED BY nothing to do */
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if(tt->flags & ASN1_TFLG_ADB_MASK) {
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*pval = NULL;
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return 1;
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}
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#ifdef CRYPTO_MDEBUG
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if(tt->field_name) CRYPTO_push_info(tt->field_name);
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#endif
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/* If SET OF or SEQUENCE OF, its a STACK */
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if(tt->flags & ASN1_TFLG_SK_MASK) {
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STACK_OF(ASN1_VALUE) *skval;
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skval = sk_ASN1_VALUE_new_null();
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if(!skval) {
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ASN1err(ASN1_F_ASN1_TEMPLATE_NEW, ERR_R_MALLOC_FAILURE);
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ret = 0;
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goto done;
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}
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*pval = (ASN1_VALUE *)skval;
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ret = 1;
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goto done;
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}
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/* Otherwise pass it back to the item routine */
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ret = asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE);
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done:
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#ifdef CRYPTO_MDEBUG
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if(it->sname) CRYPTO_pop_info();
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#endif
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return ret;
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}
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void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
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{
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/* If ADB or STACK just NULL the field */
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if(tt->flags & (ASN1_TFLG_ADB_MASK|ASN1_TFLG_SK_MASK))
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*pval = NULL;
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else
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asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
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}
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/* NB: could probably combine most of the real XXX_new() behaviour and junk all the old
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* functions.
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*/
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int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
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{
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ASN1_TYPE *typ;
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int utype;
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const ASN1_PRIMITIVE_FUNCS *pf;
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pf = it->funcs;
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if(pf && pf->prim_new) return pf->prim_new(pval, it);
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if(!it || (it->itype == ASN1_ITYPE_MSTRING)) utype = -1;
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else utype = it->utype;
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switch(utype) {
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case V_ASN1_OBJECT:
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*pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
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return 1;
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case V_ASN1_BOOLEAN:
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*(ASN1_BOOLEAN *)pval = it->size;
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return 1;
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case V_ASN1_NULL:
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*pval = (ASN1_VALUE *)1;
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return 1;
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case V_ASN1_ANY:
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typ = OPENSSL_malloc(sizeof(ASN1_TYPE));
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if(!typ) return 0;
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typ->value.ptr = NULL;
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typ->type = -1;
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*pval = (ASN1_VALUE *)typ;
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break;
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default:
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*pval = (ASN1_VALUE *)ASN1_STRING_type_new(utype);
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break;
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}
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if(*pval) return 1;
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return 0;
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}
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void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
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{
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int utype;
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const ASN1_PRIMITIVE_FUNCS *pf;
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pf = it->funcs;
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if(pf) {
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if(pf->prim_clear)
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pf->prim_clear(pval, it);
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else
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*pval = NULL;
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return;
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}
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if(!it || (it->itype == ASN1_ITYPE_MSTRING)) utype = -1;
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else utype = it->utype;
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if(utype == V_ASN1_BOOLEAN)
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*(ASN1_BOOLEAN *)pval = it->size;
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else *pval = NULL;
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}
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