dsakeyfactory.java

一个非常好的ssh客户端实现

/******************************************************************************
 *
 * Copyright (c) 1999-2003 AppGate Network Security AB. All Rights Reserved.
 * 
 * This file contains Original Code and/or Modifications of Original Code as
 * defined in and that are subject to the MindTerm Public Source License,
 * Version 2.0, (the 'License'). You may not use this file except in compliance
 * with the License.
 * 
 * You should have received a copy of the MindTerm Public Source License
 * along with this software; see the file LICENSE.  If not, write to
 * AppGate Network Security AB, Otterhallegatan 2, SE-41118 Goteborg, SWEDEN
 *
 *****************************************************************************/

package com.mindbright.security.publickey;


import com.mindbright.jca.security.Key;
import com.mindbright.jca.security.PublicKey;
import com.mindbright.jca.security.PrivateKey;
import com.mindbright.jca.security.KeyFactorySpi;
import com.mindbright.jca.security.InvalidKeyException;
import com.mindbright.jca.security.spec.KeySpec;
import com.mindbright.jca.security.spec.DSAPublicKeySpec;
import com.mindbright.jca.security.spec.DSAPrivateKeySpec;
import com.mindbright.jca.security.spec.InvalidKeySpecException;

public class DSAKeyFactory extends KeyFactorySpi {

    protected PublicKey engineGeneratePublic(KeySpec keySpec)
	throws InvalidKeySpecException {
	if(!(keySpec instanceof DSAPublicKeySpec)) {
	    throw new InvalidKeySpecException("KeySpec " + keySpec +
					      ", not supported");
	}
	DSAPublicKeySpec dsaPub = (DSAPublicKeySpec)keySpec;
	return new DSAPublicKey(dsaPub.getY(),
				dsaPub.getP(), dsaPub.getQ(), dsaPub.getG());
    }

    protected PrivateKey engineGeneratePrivate(KeySpec keySpec)
	throws InvalidKeySpecException
    {
	if(!(keySpec instanceof DSAPrivateKeySpec)) {
	    throw new InvalidKeySpecException("KeySpec " + keySpec +
					      ", not supported");
	}
	DSAPrivateKeySpec dsaPrv = (DSAPrivateKeySpec)keySpec;
	return new DSAPrivateKey(dsaPrv.getX(),
				 dsaPrv.getP(), dsaPrv.getQ(), dsaPrv.getG());
    }

    protected KeySpec engineGetKeySpec(Key key, Class keySpec)
	throws InvalidKeySpecException {
	// !!! TODO
	return null;
    }

    protected Key engineTranslateKey(Key key)
	throws InvalidKeyException {
	// !!! TODO
	return null;
    }

}