DES encrypt String value - Android java.security

Android examples for java.security:DES

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Description

DES encrypt String value

Demo Code


//package com.java2s;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;

public class Main {
    public static String enCrypto(String txt, String key)
            throws InvalidKeySpecException, InvalidKeyException,
            NoSuchPaddingException, IllegalBlockSizeException,
            BadPaddingException {
        StringBuffer sb = new StringBuffer();
        DESKeySpec desKeySpec = new DESKeySpec(key.getBytes());
        SecretKeyFactory skeyFactory = null;
        Cipher cipher = null;/*from   w ww .  ja v a 2s .  co  m*/
        try {
            skeyFactory = SecretKeyFactory.getInstance("DES");
            cipher = Cipher.getInstance("DES");
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        SecretKey deskey = skeyFactory.generateSecret(desKeySpec);
        cipher.init(Cipher.ENCRYPT_MODE, deskey);
        byte[] cipherText = cipher.doFinal(txt.getBytes());
        for (int n = 0; n < cipherText.length; n++) {
            String stmp = (Integer.toHexString(cipherText[n] & 0XFF));

            if (stmp.length() == 1) {
                sb.append("0" + stmp);
            } else {
                sb.append(stmp);
            }
        }
        return sb.toString().toUpperCase();
    }
}

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