/**
*
* 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.jce.provider;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.RSAPublicKeySpec;
import org.apache.geronimo.util.asn1.ASN1Sequence;
import org.apache.geronimo.util.asn1.DERNull;
import org.apache.geronimo.util.asn1.DEROutputStream;
import org.apache.geronimo.util.asn1.pkcs.PKCSObjectIdentifiers;
import org.apache.geronimo.util.asn1.x509.AlgorithmIdentifier;
import org.apache.geronimo.util.asn1.x509.RSAPublicKeyStructure;
import org.apache.geronimo.util.asn1.x509.SubjectPublicKeyInfo;
import org.apache.geronimo.util.crypto.params.RSAKeyParameters;
public class JCERSAPublicKey
implements RSAPublicKey
{
private BigInteger modulus;
private BigInteger publicExponent;
JCERSAPublicKey(
RSAKeyParameters key)
{
this.modulus = key.getModulus();
this.publicExponent = key.getExponent();
}
JCERSAPublicKey(
RSAPublicKeySpec spec)
{
this.modulus = spec.getModulus();
this.publicExponent = spec.getPublicExponent();
}
JCERSAPublicKey(
RSAPublicKey key)
{
this.modulus = key.getModulus();
this.publicExponent = key.getPublicExponent();
}
JCERSAPublicKey(
SubjectPublicKeyInfo info)
{
try
{
RSAPublicKeyStructure pubKey = new RSAPublicKeyStructure((ASN1Sequence)info.getPublicKey());
this.modulus = pubKey.getModulus();
this.publicExponent = pubKey.getPublicExponent();
}
catch (IOException e)
{
throw new IllegalArgumentException("invalid info structure in RSA public key");
}
}
/**
* return the modulus.
*
* @return the modulus.
*/
public BigInteger getModulus()
{
return modulus;
}
/**
* return the public exponent.
*
* @return the public exponent.
*/
public BigInteger getPublicExponent()
{
return publicExponent;
}
public String getAlgorithm()
{
return "RSA";
}
public String getFormat()
{
return "X.509";
}
public byte[] getEncoded()
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
DEROutputStream dOut = new DEROutputStream(bOut);
SubjectPublicKeyInfo info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(PKCSObjectIdentifiers.rsaEncryption, new DERNull()), new RSAPublicKeyStructure(getModulus(), getPublicExponent()).getDERObject());
try
{
dOut.writeObject(info);
dOut.close();
}
catch (IOException e)
{
throw new RuntimeException("Error encoding RSA public key");
}
return bOut.toByteArray();
}
public boolean equals(Object o)
{
if ( !(o instanceof RSAPublicKey) )
{
return false;
}
if ( o == this )
{
return true;
}
RSAPublicKey key = (RSAPublicKey)o;
return getModulus().equals(key.getModulus())
&& getPublicExponent().equals(key.getPublicExponent());
}
public String toString()
{
StringBuffer buf = new StringBuffer();
String nl = System.getProperty("line.separator");
buf.append("RSA Public Key" + nl);
buf.append(" modulus: " + this.getModulus().toString(16) + nl);
buf.append(" public exponent: " + this.getPublicExponent().toString(16) + nl);
return buf.toString();
}
}