/* crypto/asn1/x_attrib.c */

/* 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 <stdio.h>

#include "cryptlib.h"

#include <openssl/objects.h>

#include <openssl/asn1t.h>

#include <openssl/x509.h>

/* X509_ATTRIBUTE: this has the following form:

 *

 * typedef struct x509_attributes_st

 *	{

 *	ASN1_OBJECT *object;

 *	int single;

 *	union	{

 *		char		*ptr;

 * 		STACK_OF(ASN1_TYPE) *set;

 * 		ASN1_TYPE	*single;

 *		} value;

 *	} X509_ATTRIBUTE;

 *

 * this needs some extra thought because the CHOICE type is

 * merged with the main structure and because the value can

 * be anything at all we *must* try the SET OF first because

 * the ASN1_ANY type will swallow anything including the whole

 * SET OF structure.

 */

ASN1_CHOICE(X509_ATTRIBUTE_SET) = {

	ASN1_SET_OF(X509_ATTRIBUTE, value.set, ASN1_ANY),

	ASN1_SIMPLE(X509_ATTRIBUTE, value.single, ASN1_ANY)

} ASN1_CHOICE_END_selector(X509_ATTRIBUTE, X509_ATTRIBUTE_SET, single)

ASN1_SEQUENCE(X509_ATTRIBUTE) = {

	ASN1_SIMPLE(X509_ATTRIBUTE, object, ASN1_OBJECT),

	/* CHOICE type merged with parent */

	ASN1_EX_COMBINE(0, 0, X509_ATTRIBUTE_SET)

} ASN1_SEQUENCE_END(X509_ATTRIBUTE)

IMPLEMENT_ASN1_FUNCTIONS(X509_ATTRIBUTE)

IMPLEMENT_ASN1_DUP_FUNCTION(X509_ATTRIBUTE)

EXPORT_C X509_ATTRIBUTE *X509_ATTRIBUTE_create(int nid, int atrtype, void *value)

	{

	X509_ATTRIBUTE *ret=NULL;

	ASN1_TYPE *val=NULL;

	if ((ret=X509_ATTRIBUTE_new()) == NULL)

		return(NULL);

	ret->object=OBJ_nid2obj(nid);

	ret->single=0;

	if ((ret->value.set=sk_ASN1_TYPE_new_null()) == NULL) goto err;

	if ((val=ASN1_TYPE_new()) == NULL) goto err;

	if (!sk_ASN1_TYPE_push(ret->value.set,val)) goto err;

	ASN1_TYPE_set(val,atrtype,value);

	return(ret);

err:

	if (ret != NULL) X509_ATTRIBUTE_free(ret);

	if (val != NULL) ASN1_TYPE_free(val);

	return(NULL);

	}