Encryption.java

package securecommunications;

import java.security.*;
import java.security.spec.InvalidKeySpecException;
import javax.crypto.*;
import javax.crypto.spec.SecretKeySpec;
import sun.misc.*;

public class Encryption {	 
	private static final String ALGO = "AES";
	private static final byte[] keyValue = new byte[] { 'M', 'i', 's', 'c', 'p', '@', 's', 'S', 'w', '0', 'r','d', '2', '0', '1', '4' };

public static String encrypt(String Data) throws Exception {
		Key key = generateKey();
		Cipher c = Cipher.getInstance(ALGO);
		c.init(Cipher.ENCRYPT_MODE, key);
		byte[] encVal = c.doFinal(Data.getBytes());
		String encryptedValue = new BASE64Encoder().encode(encVal);
		return encryptedValue;
	}

	public static String decrypt(String encryptedData) throws Exception {
		Key key = generateKey();
		Cipher c = Cipher.getInstance(ALGO);
		c.init(Cipher.DECRYPT_MODE, key);
		byte[] decodedValue = new BASE64Decoder().decodeBuffer(encryptedData);
		byte[] decValue = c.doFinal(decodedValue);
		String decryptedValue = new String(decValue);
		return decryptedValue;
	}
	
	private static Key generateKey() throws Exception {
		Key key = new SecretKeySpec(keyValue, ALGO);
		return key;
	}
}