import java.io.UnsupportedEncodingException;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.KeySpec;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
//
import sun.misc.BASE64Encoder;
import sun.misc.BASE64Decoder;
 
public class DES {
 
    Cipher ecipher;
    Cipher dcipher;
 
    byte[] salt = {
    		-87, -101, -56, 50, 86, 53, -29, 3
    };
 
    int iterationCount = 19;
 
    DES(String passPhrase) {
        try {
            KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), salt, iterationCount);
            SecretKey key = SecretKeyFactory.getInstance(
                "PBEWithMD5AndDES").generateSecret(keySpec);
            ecipher = Cipher.getInstance(key.getAlgorithm());
            dcipher = Cipher.getInstance(key.getAlgorithm());
 
            AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);
 
            ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
            dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
        } catch (java.security.InvalidAlgorithmParameterException e) {
        } catch (java.security.spec.InvalidKeySpecException e) {
        } catch (javax.crypto.NoSuchPaddingException e) {
        } catch (java.security.NoSuchAlgorithmException e) {
        } catch (java.security.InvalidKeyException e) {
        }
    }
 
    public String encrypt(String str) {
        try {
            byte[] utf8 = str.getBytes("UTF8");
 
            byte[] enc = ecipher.doFinal(utf8);
 
            return new sun.misc.BASE64Encoder().encode(enc);
        } catch (javax.crypto.BadPaddingException e) {
        } catch (IllegalBlockSizeException e) {
        } catch (UnsupportedEncodingException e) {
        } catch (java.io.IOException e) {
        }
        return null;
    }
 
    public String decrypt(String str) {
        try {
            byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(str);
 
            byte[] utf8 = dcipher.doFinal(dec);
 
            return new String(utf8, "UTF8");
        } catch (javax.crypto.BadPaddingException e) {
        } catch (IllegalBlockSizeException e) {
        } catch (UnsupportedEncodingException e) {
        } catch (java.io.IOException e) {
        }
        return null;
    }
}
