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openssl/crypto/asn1/tasn_new.c
Dr. Stephen Henson 8d699c8c93 Check for NULL ASN1_ITEM when initializeing 
boolean option in ASN1_TYPE.
2002-11-05 13:49:04 +00:00

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/* tasn_new.c */
/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
* project 2000.
*/
/* ====================================================================
* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
*
* 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 above 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 acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED 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 OpenSSL PROJECT OR
* ITS 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.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <stddef.h>
#include <openssl/asn1.h>
#include <openssl/objects.h>
#include <openssl/err.h>
#include <openssl/asn1t.h>
#include <string.h>
static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine);
static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it)
{
ASN1_VALUE *ret = NULL;
if(ASN1_item_ex_new(&ret, it) > 0) return ret;
return NULL;
}
/* Allocate an ASN1 structure */
int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
return asn1_item_ex_combine_new(pval, it, 0);
}
static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine)
{
const ASN1_TEMPLATE *tt = NULL;
const ASN1_COMPAT_FUNCS *cf;
const ASN1_EXTERN_FUNCS *ef;
const ASN1_AUX *aux = it->funcs;
ASN1_aux_cb *asn1_cb;
ASN1_VALUE **pseqval;
int i;
if(aux && aux->asn1_cb) asn1_cb = aux->asn1_cb;
else asn1_cb = 0;
if(!combine) *pval = NULL;
#ifdef CRYPTO_MDEBUG
if(it->sname) CRYPTO_push_info(it->sname);
#endif
switch(it->itype) {
case ASN1_ITYPE_EXTERN:
ef = it->funcs;
if(ef && ef->asn1_ex_new) {
if(!ef->asn1_ex_new(pval, it))
goto memerr;
}
break;
case ASN1_ITYPE_COMPAT:
cf = it->funcs;
if(cf && cf->asn1_new) {
*pval = cf->asn1_new();
if(!*pval) goto memerr;
}
break;
case ASN1_ITYPE_PRIMITIVE:
if(it->templates) {
if(!ASN1_template_new(pval, it->templates))
goto memerr;
} else {
if(!ASN1_primitive_new(pval, it))
goto memerr;
}
break;
case ASN1_ITYPE_MSTRING:
if(!ASN1_primitive_new(pval, it))
goto memerr;
break;
case ASN1_ITYPE_CHOICE:
if(asn1_cb) {
i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
if(!i) goto auxerr;
if(i==2) {
#ifdef CRYPTO_MDEBUG
if(it->sname) CRYPTO_pop_info();
#endif
return 1;
}
}
if(!combine) {
*pval = OPENSSL_malloc(it->size);
if(!*pval) goto memerr;
memset(*pval, 0, it->size);
}
asn1_set_choice_selector(pval, -1, it);
if(asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
goto auxerr;
break;
case ASN1_ITYPE_SEQUENCE:
if(asn1_cb) {
i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
if(!i) goto auxerr;
if(i==2) {
#ifdef CRYPTO_MDEBUG
if(it->sname) CRYPTO_pop_info();
#endif
return 1;
}
}
if(!combine) {
*pval = OPENSSL_malloc(it->size);
if(!*pval) goto memerr;
memset(*pval, 0, it->size);
asn1_do_lock(pval, 0, it);
asn1_enc_init(pval, it);
}
for(i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
pseqval = asn1_get_field_ptr(pval, tt);
if(!ASN1_template_new(pseqval, tt)) goto memerr;
}
if(asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
goto auxerr;
break;
}
#ifdef CRYPTO_MDEBUG
if(it->sname) CRYPTO_pop_info();
#endif
return 1;
memerr:
ASN1err(ASN1_F_ASN1_ITEM_NEW, ERR_R_MALLOC_FAILURE);
#ifdef CRYPTO_MDEBUG
if(it->sname) CRYPTO_pop_info();
#endif
return 0;
auxerr:
ASN1err(ASN1_F_ASN1_ITEM_NEW, ASN1_R_AUX_ERROR);
ASN1_item_ex_free(pval, it);
#ifdef CRYPTO_MDEBUG
if(it->sname) CRYPTO_pop_info();
#endif
return 0;
}
static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
const ASN1_EXTERN_FUNCS *ef;
switch(it->itype) {
case ASN1_ITYPE_EXTERN:
ef = it->funcs;
if(ef && ef->asn1_ex_clear)
ef->asn1_ex_clear(pval, it);
else *pval = NULL;
break;
case ASN1_ITYPE_PRIMITIVE:
if(it->templates)
asn1_template_clear(pval, it->templates);
else
asn1_primitive_clear(pval, it);
break;
case ASN1_ITYPE_MSTRING:
asn1_primitive_clear(pval, it);
break;
case ASN1_ITYPE_COMPAT:
case ASN1_ITYPE_CHOICE:
case ASN1_ITYPE_SEQUENCE:
*pval = NULL;
break;
}
}
int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
{
const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
int ret;
if(tt->flags & ASN1_TFLG_OPTIONAL) {
asn1_template_clear(pval, tt);
return 1;
}
/* If ANY DEFINED BY nothing to do */
if(tt->flags & ASN1_TFLG_ADB_MASK) {
*pval = NULL;
return 1;
}
#ifdef CRYPTO_MDEBUG
if(tt->field_name) CRYPTO_push_info(tt->field_name);
#endif
/* If SET OF or SEQUENCE OF, its a STACK */
if(tt->flags & ASN1_TFLG_SK_MASK) {
STACK_OF(ASN1_VALUE) *skval;
skval = sk_ASN1_VALUE_new_null();
if(!skval) {
ASN1err(ASN1_F_ASN1_TEMPLATE_NEW, ERR_R_MALLOC_FAILURE);
ret = 0;
goto done;
}
*pval = (ASN1_VALUE *)skval;
ret = 1;
goto done;
}
/* Otherwise pass it back to the item routine */
ret = asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE);
done:
#ifdef CRYPTO_MDEBUG
if(it->sname) CRYPTO_pop_info();
#endif
return ret;
}
static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
{
/* If ADB or STACK just NULL the field */
if(tt->flags & (ASN1_TFLG_ADB_MASK|ASN1_TFLG_SK_MASK))
*pval = NULL;
else
asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
}
/* NB: could probably combine most of the real XXX_new() behaviour and junk all the old
* functions.
*/
int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
ASN1_TYPE *typ;
int utype;
const ASN1_PRIMITIVE_FUNCS *pf;
pf = it->funcs;
if(pf && pf->prim_new) return pf->prim_new(pval, it);
if(!it || (it->itype == ASN1_ITYPE_MSTRING)) utype = -1;
else utype = it->utype;
switch(utype) {
case V_ASN1_OBJECT:
*pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
return 1;
case V_ASN1_BOOLEAN:
if (it)
*(ASN1_BOOLEAN *)pval = it->size;
else
*(ASN1_BOOLEAN *)pval = -1;
return 1;
case V_ASN1_NULL:
*pval = (ASN1_VALUE *)1;
return 1;
case V_ASN1_ANY:
typ = OPENSSL_malloc(sizeof(ASN1_TYPE));
if(!typ) return 0;
typ->value.ptr = NULL;
typ->type = -1;
*pval = (ASN1_VALUE *)typ;
break;
default:
*pval = (ASN1_VALUE *)ASN1_STRING_type_new(utype);
break;
}
if(*pval) return 1;
return 0;
}
void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
int utype;
const ASN1_PRIMITIVE_FUNCS *pf;
pf = it->funcs;
if(pf) {
if(pf->prim_clear)
pf->prim_clear(pval, it);
else
*pval = NULL;
return;
}
if(!it || (it->itype == ASN1_ITYPE_MSTRING)) utype = -1;
else utype = it->utype;
if(utype == V_ASN1_BOOLEAN)
*(ASN1_BOOLEAN *)pval = it->size;
else *pval = NULL;
}
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