AgreementEnvelope.java

/**
 * Copyright (c) 2011, SOCIETIES Consortium (WATERFORD INSTITUTE OF TECHNOLOGY (TSSG), HERIOT-WATT UNIVERSITY (HWU), SOLUTA.NET 
 * (SN), GERMAN AEROSPACE CENTRE (Deutsches Zentrum fuer Luft- und Raumfahrt e.V.) (DLR), Zavod za varnostne tehnologije
 * informacijske družbe in elektronsko poslovanje (SETCCE), INSTITUTE OF COMMUNICATION AND COMPUTER SYSTEMS (ICCS), LAKE
 * COMMUNICATIONS (LAKE), INTEL PERFORMANCE LEARNING SOLUTIONS LTD (INTEL), PORTUGAL TELECOM INOVAÇÃO, SA (PTIN), IBM Corp., 
 * INSTITUT TELECOM (ITSUD), AMITEC DIACHYTI EFYIA PLIROFORIKI KAI EPIKINONIES ETERIA PERIORISMENIS EFTHINIS (AMITEC), TELECOM 
 * ITALIA S.p.a.(TI),  TRIALOG (TRIALOG), Stiftelsen SINTEF (SINTEF), NEC EUROPE LTD (NEC))
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
 * conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
 *    disclaimer in the documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
 * SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.societies.api.internal.privacytrust.privacyprotection.model.privacypolicy;


import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.security.Key;
import java.util.Arrays;
import java.util.zip.CRC32;
import java.util.zip.Checksum;

import org.apache.commons.lang3.builder.EqualsBuilder;

/**
 * This class is used after the negotiation succeeds to seal the contract between the negotiating parties. 
 * The envelope contains the negotiation agreement in encrypted format, the user's signature and the public 
 * key with which the provider is able to decrypt the agreement. The AgreementEnvelope object is prepared by
 *  the user's negotiation agent and sent to the provider's negotiation agent.
 * @author Elizabeth
 *
 */
@Deprecated
public class AgreementEnvelope implements IAgreementEnvelope, Serializable{

	private IAgreement agreement;
	private byte[] signature;
	private transient Checksum agreementCheckSum;
	private byte[] publicKey;

	AgreementEnvelope(){

	}
	public AgreementEnvelope(IAgreement agreement, byte[] publickey, byte[] signature){
		this.agreement = agreement;
		this.signature = signature;
		this.publicKey = publickey;
		this.calculateChecksum();
	}


	private void calculateChecksum(){
		agreementCheckSum = new CRC32();
		byte[] byteArray;
		try {
			byteArray = getBytes(agreement);
			agreementCheckSum.update(byteArray, 0, byteArray.length);
			//long checksum = checksumEngine.getValue();
			//System.out.println("Checksum: "+checksum);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	private byte[] getBytes(Object obj) throws java.io.IOException{
		ByteArrayOutputStream bos = new ByteArrayOutputStream(); 
		ObjectOutputStream oos = new ObjectOutputStream(bos); 
		oos.writeObject(obj);
		oos.flush(); 
		oos.close(); 
		bos.close();
		byte [] data = bos.toByteArray();
		return data;
	}


	/* (non-Javadoc)
	 * @see org.personalsmartspace.spm.negotiation.api.platform.IAgreementEnvelope#getAgreement()
	 */
	@Override
	public IAgreement getAgreement() {
		return this.agreement;
	}

	/* (non-Javadoc)
	 * @see org.personalsmartspace.spm.negotiation.api.platform.IAgreementEnvelope#getChecksum()
	 */
	@Override
	public Checksum getChecksum() {
		return this.agreementCheckSum;
	}

	/* (non-Javadoc)
	 * @see org.personalsmartspace.spm.negotiation.api.platform.IAgreementEnvelope#getSignature()
	 */
	@Override
	public byte[] getSignature() {
		return this.signature;
	}

	/* (non-Javadoc)
	 * @see org.personalsmartspace.spm.negotiation.api.platform.IAgreementEnvelope#getPublicKey()
	 */
	@Override
	public Key getPublicKey() {
		return (Key) this.getObject(publicKey);
	}

	public byte[] getPublicKeyInBytes(){
		return this.publicKey;
	}
	public String getPublicKeyAsString(){
		return this.getObject(publicKey).toString();
	}
	public Object getObject(byte[] bytes){
		ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
		try {
			ObjectInputStream ois = new ObjectInputStream(bis);
			return ois.readObject();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result
				+ ((agreement == null) ? 0 : agreement.hashCode());
		result = prime * result + Arrays.hashCode(publicKey);
		result = prime * result + Arrays.hashCode(signature);
		return result;
	}
	/*
	 * (non-Javadoc)
	 * @see java.lang.Object#equals(java.lang.Object)
	 */
	@Override
	public boolean equals(Object obj) {
		// -- Verify reference equality
		if (obj == null) { return false; }
		if (obj == this) { return true; }
		if (obj.getClass() != getClass()) {
			return false;
		}
		// -- Verify obj type
		AgreementEnvelope rhs = (AgreementEnvelope) obj;
		return new EqualsBuilder()
			.append(this.getAgreement(), rhs.getAgreement())
//			.append(this.getSignature(), rhs.getSignature())
//			.append(this.getPublicKeyAsString(), rhs.getPublicKeyAsString())
			.isEquals();
	}
	
	public String toString() {
		StringBuilder sb = new StringBuilder("AgreementEnvelope: [");
		sb.append("public key: "+getPublicKeyAsString()+", ");
		sb.append("signature: "+getSignature()+", ");
		sb.append("signature: "+getAgreement()+", ");
		return sb.toString();
	}
	

}