/*
* 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 java.math.BigInteger;
import java.util.Enumeration;
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.DERInteger;
import com.maverick.crypto.asn1.DERObject;
import com.maverick.crypto.asn1.DERSequence;
public class RSAPublicKeyStructure
implements DEREncodable
{
private BigInteger modulus;
private BigInteger publicExponent;
public static RSAPublicKeyStructure getInstance(
ASN1TaggedObject obj,
boolean explicit)
{
return getInstance(ASN1Sequence.getInstance(obj, explicit));
}
public static RSAPublicKeyStructure getInstance(
Object obj)
{
if(obj == null || obj instanceof RSAPublicKeyStructure)
{
return (RSAPublicKeyStructure)obj;
}
if(obj instanceof ASN1Sequence)
{
return new RSAPublicKeyStructure((ASN1Sequence)obj);
}
throw new IllegalArgumentException("Invalid RSAPublicKeyStructure: " + obj.getClass().getName());
}
public RSAPublicKeyStructure(
BigInteger modulus,
BigInteger publicExponent)
{
this.modulus = modulus;
this.publicExponent = publicExponent;
}
public RSAPublicKeyStructure(
ASN1Sequence seq)
{
Enumeration e = seq.getObjects();
modulus = ((DERInteger)e.nextElement()).getPositiveValue();
publicExponent = ((DERInteger)e.nextElement()).getPositiveValue();
}
public BigInteger getModulus()
{
return modulus;
}
public BigInteger getPublicExponent()
{
return publicExponent;
}
/**
* This outputs the key in PKCS1v2 format.
* <pre>
* RSAPublicKey ::= SEQUENCE {
* modulus INTEGER, -- n
* publicExponent INTEGER, -- e
* }
* </pre>
* <p>
*/
public DERObject getDERObject()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(new DERInteger(getModulus()));
v.add(new DERInteger(getPublicExponent()));
return new DERSequence(v);
}
}