/* 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;

 }