/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.crypto.asn1.x509;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.Enumeration;
import org.apache.geronimo.crypto.asn1.ASN1Encodable;
import org.apache.geronimo.crypto.asn1.ASN1EncodableVector;
import org.apache.geronimo.crypto.asn1.ASN1InputStream;
import org.apache.geronimo.crypto.asn1.ASN1Sequence;
import org.apache.geronimo.crypto.asn1.ASN1TaggedObject;
import org.apache.geronimo.crypto.asn1.DERBitString;
import org.apache.geronimo.crypto.asn1.DEREncodable;
import org.apache.geronimo.crypto.asn1.DERObject;
import org.apache.geronimo.crypto.asn1.DERSequence;
/**
* The object that contains the public key stored in a certficate.
* <p>
* The getEncoded() method in the public keys in the JCE produces a DER
* encoded one of these.
*/
public class SubjectPublicKeyInfo
extends ASN1Encodable
{
private AlgorithmIdentifier algId;
private DERBitString keyData;
public static SubjectPublicKeyInfo getInstance(
ASN1TaggedObject obj,
boolean explicit)
{
return getInstance(ASN1Sequence.getInstance(obj, explicit));
}
public static SubjectPublicKeyInfo getInstance(
Object obj)
{
if (obj instanceof SubjectPublicKeyInfo)
{
return (SubjectPublicKeyInfo)obj;
}
else if (obj instanceof ASN1Sequence)
{
return new SubjectPublicKeyInfo((ASN1Sequence)obj);
}
throw new IllegalArgumentException("unknown object in factory");
}
public SubjectPublicKeyInfo(
AlgorithmIdentifier algId,
DEREncodable publicKey)
{
this.keyData = new DERBitString(publicKey);
this.algId = algId;
}
public SubjectPublicKeyInfo(
AlgorithmIdentifier algId,
byte[] publicKey)
{
this.keyData = new DERBitString(publicKey);
this.algId = algId;
}
public SubjectPublicKeyInfo(
ASN1Sequence seq)
{
Enumeration e = seq.getObjects();
this.algId = AlgorithmIdentifier.getInstance(e.nextElement());
this.keyData = (DERBitString)e.nextElement();
}
public AlgorithmIdentifier getAlgorithmId()
{
return algId;
}
/**
* for when the public key is an encoded object - if the bitstring
* can't be decoded this routine throws an IOException.
*
* @exception IOException - if the bit string doesn't represent a DER
* encoded object.
*/
public DERObject getPublicKey()
throws IOException
{
ByteArrayInputStream bIn = new ByteArrayInputStream(keyData.getBytes());
ASN1InputStream aIn = new ASN1InputStream(bIn);
return aIn.readObject();
}
/**
* for when the public key is raw bits...
*/
public DERBitString getPublicKeyData()
{
return keyData;
}
/**
* Produce an object suitable for an ASN1OutputStream.
* <pre>
* SubjectPublicKeyInfo ::= SEQUENCE {
* algorithm AlgorithmIdentifier,
* publicKey BIT STRING }
* </pre>
*/
public DERObject toASN1Object()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(algId);
v.add(keyData);
return new DERSequence(v);
}
}