package?com.des;

import?android.annotation.SuppressLint;
import?java.security.SecureRandom;

import?javax.crypto.Cipher;
import?javax.crypto.SecretKey;
import?javax.crypto.SecretKeyFactory;
import?javax.crypto.spec.DESKeySpec;

@SuppressLint（“DefaultLocale“）
public?class?DES
{
????public?DES（）
????{
????}

????//?測(cè)試
????/**
?????*?把16進(jìn)制字符串轉(zhuǎn)換成字節(jié)數(shù)組
?????*?
?????*?@param?hex
?????*?@return
?????*/
????public?static?byte[]?hexStringToByte（String?hex）
????{
	int?len?=?（hex.length（）?/?2）;
	byte[]?result?=?new?byte[len];
	char[]?achar?=?hex.toCharArray（）;
	for?（int?i?=?0;?i?	{
	????int?pos?=?i?*?2;
	????result[i]?=?（byte）?（toByte（achar[pos]）?<	}
	return?result;
????}

????private?static?byte?toByte（char?c）
????{
	b