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/*
 * Copyright (c) 2009-2010 David Grant
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.jscep.asn1;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERObject;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.x509.X509Name;

/**
 * This class represents the SCEP IssuerAndSubject ASN.1 object.
 * 
 * This object is defined by the following ASN.1 notation:
 * 
 * IssuerAndSubject ::= SEQUENCE {
 *     issuer Name,
 *     subject Name,
 * }
 * 
 * 
 * @author David Grant
 */
public class IssuerAndSubject extends ASN1Encodable {
	private final X509Name issuer;
	private final X509Name subject;

	public IssuerAndSubject(ASN1Sequence seq) {
		issuer = X509Name.getInstance(seq.getObjectAt(0));
		subject = X509Name.getInstance(seq.getObjectAt(1));
	}
	
	public IssuerAndSubject(X509Name issuer, X509Name subject) {
		this.issuer = issuer;
		this.subject = subject;
	}

	public X509Name getIssuer() {
		return issuer;
	}

	public X509Name getSubject() {
		return subject;
	}

	@Override
	public DERObject toASN1Object() {
		ASN1EncodableVector v = new ASN1EncodableVector();
		
		v.add(issuer);
		v.add(subject);
		
		return new DERSequence(v);
	}
	
	public static IssuerAndSubject getInstance(ASN1Encodable encodable) {
		final ASN1Sequence seq = DERSequence.getInstance(encodable);
		
		return new IssuerAndSubject(seq);
	}
}