encrypt Des String - Android java.security

Android examples for java.security:DES

  1. HOME
  2. Android
  3. java.security
  4. DES

Description

encrypt Des String

Demo Code


//package com.java2s;
import java.security.Key;
import java.security.SecureRandom;
import java.util.Locale;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;

public class Main {

    public static String encryptDesString(String key, String str) {
        return byte2hex(getEncCode(key, str.getBytes()));
    }//from   ww w  .j a  va  2 s . c o  m

    private static String byte2hex(byte[] b) { 

        String hs = "";
        String stmp = "";
        for (int n = 0; n < b.length; n++) {

            stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
            if (stmp.length() == 1) {
                hs = hs + "0" + stmp;
            } else {
                hs = hs + stmp;
            }
        }
        return hs.toUpperCase(Locale.getDefault());
    }

    private static byte[] getEncCode(String key, byte[] byteS) {
        byte[] byteFina = null;
        Cipher cipher;
        try {
            cipher = Cipher.getInstance("DES");
            cipher.init(Cipher.ENCRYPT_MODE, newDesInstance(key));
            byteFina = cipher.doFinal(byteS);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            cipher = null;
        }
        return byteFina;
    }

    private static Key newDesInstance(String strKey) {
        Key key = null;
        try {
            KeyGenerator keyGenerator = KeyGenerator.getInstance("DES");
            keyGenerator.init(new SecureRandom(strKey.getBytes()));
            key = keyGenerator.generateKey();
            keyGenerator = null;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return key;
    }
}

Related Tutorials