org/objectweb/proactive/ext/security/crypto/SigningEngine.java

/* 
 * ################################################################
 * 
 * ProActive: The Java(TM) library for Parallel, Distributed, 
 *            Concurrent computing with Security and Mobility
 * 
 * Copyright (C) 1997-2007 INRIA/University of Nice-Sophia Antipolis
 * Contact: proactive@objectweb.org
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or any later version.
 *  
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 * USA
 *  
 *  Initial developer(s):               The ProActive Team
 *                        http://www.inria.fr/oasis/ProActive/contacts.html
 *  Contributor(s): 
 * 
 * ################################################################
 */ 
package org.objectweb.proactive.ext.security.crypto;

import java.io.Serializable;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import java.security.SignedObject;


public class SigningEngine implements Serializable {
    private transient Signature signingEngine;

    public SigningEngine() {
        try {
            signingEngine = Signature.getInstance("SHA-1/RSA", "BC");
        } catch (Exception e) {
            System.out.println("Exception in SigningEngine instanciation : " +
                e);
            e.printStackTrace();
        }
    }

    public Object signObject(Serializable object, PrivateKey privateKey) {
        try {
            return new SignedObject(object, privateKey, signingEngine);
        } catch (Exception e) {
            System.out.println("Exception in object signature : " + e);
            System.out.println(privateKey);
            e.printStackTrace();
        }

        return null;
    }

    public boolean checkSignature(Object signedObject, PublicKey publicKey) {
        try {
            if (((SignedObject) signedObject).verify(publicKey, signingEngine)) {
                return true;
            }
        } catch (Exception e) {
            System.out.println("Exception object signature checking :" + e);
            e.printStackTrace();
        }

        return false;
    }
}

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