org.umit.icm.mobile.process.KeyManager.java Source code

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Here is the source code for org.umit.icm.mobile.process.KeyManager.java

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/**
 * Copyright (C) 2011 Adriano Monteiro Marques
 *
 * Author:  Zubair Nabi <zn.zubairnabi@gmail.com>
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

package org.umit.icm.mobile.process;

/**
 * Manages the SecretKey, PrivateKey, PublicKey and CipheredKey.
 */

import java.io.IOException;
import java.security.KeyPair;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.spec.InvalidKeySpecException;
import java.util.Random;

import org.apache.commons.codec.binary.Base64;
import org.umit.icm.mobile.proto.MessageProtos.RSAKey;
import org.umit.icm.mobile.utils.CryptoKeyWriter;
import org.umit.icm.mobile.utils.RSACrypto;

public class KeyManager {
    private PrivateKey myPrivateKey;
    private PublicKey myPublicKey;
    private String myCipheredKeyMod;
    private String myCipheredKeyExp;
    private PublicKey aggrPublicKey;
    private byte[] aesKey;

    public KeyManager(PrivateKey myPrivateKey, PublicKey myPublicKey, String myCipheredKeyMod,
            String myCipheredKeyExp) {
        super();
        this.myPrivateKey = myPrivateKey;
        this.myPublicKey = myPublicKey;
        this.myCipheredKeyMod = myCipheredKeyMod;
        this.myCipheredKeyExp = myCipheredKeyExp;

    }

    public KeyManager() {
        super();
        //generate all keys
        try {
            if (Constants.DEBUG_MODE)
                System.out.println("Setting up KeyManager");
            //generate RSA key pair
            KeyPair keypair = RSACrypto.generateKey();
            this.setMyPublicKey(keypair.getPublic());
            this.setMyPrivateKey(keypair.getPrivate());
            //now separate public key into its mod and exp
            RSAKey rsaKey = RSACrypto.getPublicKeyIntegers(keypair.getPublic());
            this.setMyCipheredKeyMod(rsaKey.getMod());
            this.setMyCipheredKeyExp(rsaKey.getExp());
            //generate aggregator's public key
            this.setAggregatorPublicKey(
                    RSACrypto.generatePublicKey(Constants.AGGR_PUB_KEY_MOD, Constants.AGGR_PUB_KEY_EXP));
            if (Constants.DEBUG_MODE)
                System.out.println("AGGRPUBLICKEY inside KeyManager : " + aggrPublicKey);
            //generate AES symmetric key
            byte[] bits = new byte[Constants.AES_BLOCK_SIZE];
            new Random().nextBytes(bits);
            this.setAESKey(Base64.encodeBase64(bits));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public synchronized PublicKey getAggregatorPublicKey() {
        return this.aggrPublicKey;
    }

    public synchronized void setAggregatorPublicKey(PublicKey publicKey) {
        this.aggrPublicKey = publicKey;
    }

    public synchronized byte[] getAESKey() {
        return this.aesKey;
    }

    public synchronized void setAESKey(byte[] aesKey) {
        this.aesKey = aesKey;
    }

    public synchronized PrivateKey getMyPrivateKey() {
        return myPrivateKey;
    }

    /**
     * Writes the PrivateKey to disk.
     *
     *
         
     @param myPrivateKey PrivateKey of type {@link PrivateKey}
     *
         
     @see CryptoKeyWriter
     */
    public synchronized void setMyPrivateKey(PrivateKey myPrivateKey) {
        this.myPrivateKey = myPrivateKey;
        try {
            CryptoKeyWriter.writeMyPrivateKey(this.myPrivateKey);
        } catch (NoSuchAlgorithmException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (InvalidKeySpecException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    public synchronized PublicKey getMyPublicKey() {
        return myPublicKey;
    }

    /**
     * Writes the PublicKey to disk.
     *
     *
         
     @param myPublicKey PublicKey of type {@link PublicKey}
     *
         
     @see CryptoKeyWriter
     */
    public synchronized void setMyPublicKey(PublicKey myPublicKey) {
        this.myPublicKey = myPublicKey;
        try {
            CryptoKeyWriter.writeMyPublicKey(this.myPublicKey);
        } catch (NoSuchAlgorithmException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (InvalidKeySpecException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    public String getMyCipheredKeyMod() {
        return myCipheredKeyMod;
    }

    public void setMyCipheredKeyMod(String myCipheredKeyMod) {
        this.myCipheredKeyMod = myCipheredKeyMod;
        try {
            CryptoKeyWriter.writeMyCipheredKeyMod(myCipheredKeyMod);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (RuntimeException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    public String getMyCipheredKeyExp() {
        return myCipheredKeyExp;
    }

    public void setMyCipheredKeyExp(String myCipheredKeyExp) {
        this.myCipheredKeyExp = myCipheredKeyExp;
        try {
            CryptoKeyWriter.writeMyCipheredKeyExp(myCipheredKeyExp);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (RuntimeException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

}