/**
*
* Copyright 2003-2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.geronimo.util.asn1.x509;
import java.util.Enumeration;
import org.apache.geronimo.util.asn1.ASN1Encodable;
import org.apache.geronimo.util.asn1.ASN1EncodableVector;
import org.apache.geronimo.util.asn1.ASN1OctetString;
import org.apache.geronimo.util.asn1.ASN1Sequence;
import org.apache.geronimo.util.asn1.ASN1TaggedObject;
import org.apache.geronimo.util.asn1.DERObject;
import org.apache.geronimo.util.asn1.DEROctetString;
import org.apache.geronimo.util.asn1.DERSequence;
/**
* The DigestInfo object.
* <pre>
* DigestInfo::=SEQUENCE{
* digestAlgorithm AlgorithmIdentifier,
* digest OCTET STRING }
* </pre>
*/
public class DigestInfo
extends ASN1Encodable
{
private byte[] digest;
private AlgorithmIdentifier algId;
public static DigestInfo getInstance(
ASN1TaggedObject obj,
boolean explicit)
{
return getInstance(ASN1Sequence.getInstance(obj, explicit));
}
public static DigestInfo getInstance(
Object obj)
{
if (obj instanceof DigestInfo)
{
return (DigestInfo)obj;
}
else if (obj instanceof ASN1Sequence)
{
return new DigestInfo((ASN1Sequence)obj);
}
throw new IllegalArgumentException("unknown object in factory");
}
public DigestInfo(
AlgorithmIdentifier algId,
byte[] digest)
{
this.digest = digest;
this.algId = algId;
}
public DigestInfo(
ASN1Sequence obj)
{
Enumeration e = obj.getObjects();
algId = AlgorithmIdentifier.getInstance(e.nextElement());
digest = ((ASN1OctetString)e.nextElement()).getOctets();
}
public AlgorithmIdentifier getAlgorithmId()
{
return algId;
}
public byte[] getDigest()
{
return digest;
}
public DERObject toASN1Object()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(algId);
v.add(new DEROctetString(digest));
return new DERSequence(v);
}
}