DES.java

package com.d3.d3xmpp.util;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class DES {
	private static byte[] iv = { 1, 2, 3, 4, 5, 6, 7, 8 };

	public static String encryptDES(String encryptString) {
		String encodedString = "";
		String key = "wxtlxxyx";
		try {
			encodedString = encryptDES(encryptString, key);
		} catch (Exception ex) {
		}
		return encodedString;
	}

	public static String encryptDES(String encryptString, String encryptKey) throws Exception {
		IvParameterSpec zeroIv = new IvParameterSpec(iv);
		SecretKeySpec key = new SecretKeySpec(encryptKey.getBytes(), "DES");
		Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
		cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);
		byte[] encryptedData = cipher.doFinal(encryptString.getBytes());

		return android.util.Base64.encodeToString(encryptedData, android.util.Base64.NO_WRAP);
	}

	public static String decryptDES(String decryptString, String decryptKey) throws Exception {
		byte[] byteMi = android.util.Base64.decode(decryptString, android.util.Base64.NO_WRAP);
		IvParameterSpec zeroIv = new IvParameterSpec(iv);
		SecretKeySpec key = new SecretKeySpec(decryptKey.getBytes(), "DES");
		Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
		cipher.init(Cipher.DECRYPT_MODE, key, zeroIv);
		byte decryptedData[] = cipher.doFinal(byteMi);
		return new String(decryptedData);
	}
}