/*
* Adito
*
* Copyright (C) 2003-2006 3SP LTD. All Rights Reserved
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package com.maverick.crypto.asn1.x509;
import com.maverick.crypto.asn1.ASN1Encodable;
import com.maverick.crypto.asn1.ASN1EncodableVector;
import com.maverick.crypto.asn1.ASN1Sequence;
import com.maverick.crypto.asn1.ASN1TaggedObject;
import com.maverick.crypto.asn1.DEREncodable;
import com.maverick.crypto.asn1.DERObject;
import com.maverick.crypto.asn1.DERObjectIdentifier;
import com.maverick.crypto.asn1.DERSequence;
public class AlgorithmIdentifier
extends ASN1Encodable
{
private DERObjectIdentifier objectId;
private DEREncodable parameters;
private boolean parametersDefined = false;
public static AlgorithmIdentifier getInstance(
ASN1TaggedObject obj,
boolean explicit)
{
return getInstance(ASN1Sequence.getInstance(obj, explicit));
}
public static AlgorithmIdentifier getInstance(
Object obj)
{
if (obj instanceof AlgorithmIdentifier)
{
return (AlgorithmIdentifier)obj;
}
if (obj instanceof DERObjectIdentifier)
{
return new AlgorithmIdentifier((DERObjectIdentifier)obj);
}
if (obj instanceof String)
{
return new AlgorithmIdentifier((String)obj);
}
if (obj instanceof ASN1Sequence)
{
return new AlgorithmIdentifier((ASN1Sequence)obj);
}
throw new IllegalArgumentException("unknown object in factory");
}
public AlgorithmIdentifier(
DERObjectIdentifier objectId)
{
this.objectId = objectId;
}
public AlgorithmIdentifier(
String objectId)
{
this.objectId = new DERObjectIdentifier(objectId);
}
public AlgorithmIdentifier(
DERObjectIdentifier objectId,
DEREncodable parameters)
{
parametersDefined = true;
this.objectId = objectId;
this.parameters = parameters;
}
public AlgorithmIdentifier(
ASN1Sequence seq)
{
objectId = (DERObjectIdentifier)seq.getObjectAt(0);
if (seq.size() == 2)
{
parametersDefined = true;
parameters = seq.getObjectAt(1);
}
else
{
parameters = null;
}
}
public DERObjectIdentifier getObjectId()
{
return objectId;
}
public DEREncodable getParameters()
{
return parameters;
}
/**
* Produce an object suitable for an ASN1OutputStream.
* <pre>
* AlgorithmIdentifier ::= SEQUENCE {
* algorithm OBJECT IDENTIFIER,
* parameters ANY DEFINED BY algorithm OPTIONAL }
* </pre>
*/
public DERObject toASN1Object()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(objectId);
if (parametersDefined)
{
v.add(parameters);
}
return new DERSequence(v);
}
}