/* pk7_attr.c */

/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL

 * project 2001.

 */

/* ====================================================================

 * Copyright (c) 2001-2004 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 <stdio.h>

#include <stdlib.h>

#include <openssl/bio.h>

#include <openssl/asn1.h>

#include <openssl/pem.h>

#include <openssl/pkcs7.h>

#include <openssl/x509.h>

#include <openssl/err.h>

EXPORT_C int PKCS7_add_attrib_smimecap(PKCS7_SIGNER_INFO *si, STACK_OF(X509_ALGOR) *cap)

{

	ASN1_STRING *seq;

	unsigned char *p, *pp;

	int len;

	len=i2d_ASN1_SET_OF_X509_ALGOR(cap,NULL,i2d_X509_ALGOR,

				       V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL,

				       IS_SEQUENCE);

	if(!(pp=(unsigned char *)OPENSSL_malloc(len))) {

		PKCS7err(PKCS7_F_PKCS7_ADD_ATTRIB_SMIMECAP,ERR_R_MALLOC_FAILURE);

		return 0;

	}

	p=pp;

	i2d_ASN1_SET_OF_X509_ALGOR(cap,&p,i2d_X509_ALGOR, V_ASN1_SEQUENCE,

				   V_ASN1_UNIVERSAL, IS_SEQUENCE);

	if(!(seq = ASN1_STRING_new())) {

		PKCS7err(PKCS7_F_PKCS7_ADD_ATTRIB_SMIMECAP,ERR_R_MALLOC_FAILURE);

		return 0;

	}

	if(!ASN1_STRING_set (seq, pp, len)) {

		PKCS7err(PKCS7_F_PKCS7_ADD_ATTRIB_SMIMECAP,ERR_R_MALLOC_FAILURE);

		return 0;

	}

	OPENSSL_free (pp);

        return PKCS7_add_signed_attribute(si, NID_SMIMECapabilities,

							V_ASN1_SEQUENCE, seq);

}

EXPORT_C STACK_OF(X509_ALGOR) *PKCS7_get_smimecap(PKCS7_SIGNER_INFO *si)

	{

	ASN1_TYPE *cap;

	const unsigned char *p;

	cap = PKCS7_get_signed_attribute(si, NID_SMIMECapabilities);

	if (!cap || (cap->type != V_ASN1_SEQUENCE))

		return NULL;

	p = cap->value.sequence->data;

	return d2i_ASN1_SET_OF_X509_ALGOR(NULL, &p,

					  cap->value.sequence->length,

					  d2i_X509_ALGOR, X509_ALGOR_free,

					  V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL);

	}

/* Basic smime-capabilities OID and optional integer arg */

EXPORT_C int PKCS7_simple_smimecap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)

{

	X509_ALGOR *alg;

	if(!(alg = X509_ALGOR_new())) {

		PKCS7err(PKCS7_F_PKCS7_SIMPLE_SMIMECAP,ERR_R_MALLOC_FAILURE);

		return 0;

	}

	ASN1_OBJECT_free(alg->algorithm);

	alg->algorithm = OBJ_nid2obj (nid);

	if (arg > 0) {

		ASN1_INTEGER *nbit;

		if(!(alg->parameter = ASN1_TYPE_new())) {

			PKCS7err(PKCS7_F_PKCS7_SIMPLE_SMIMECAP,ERR_R_MALLOC_FAILURE);

			return 0;

		}

		if(!(nbit = ASN1_INTEGER_new())) {

			PKCS7err(PKCS7_F_PKCS7_SIMPLE_SMIMECAP,ERR_R_MALLOC_FAILURE);

			return 0;

		}

		if(!ASN1_INTEGER_set (nbit, arg)) {

			PKCS7err(PKCS7_F_PKCS7_SIMPLE_SMIMECAP,ERR_R_MALLOC_FAILURE);

			return 0;

		}

		alg->parameter->value.integer = nbit;

		alg->parameter->type = V_ASN1_INTEGER;

	}

	sk_X509_ALGOR_push (sk, alg);

	return 1;

}