package?algorithm;


import?java.math.BigInteger;
import?java.security.MessageDigest;
import?java.security.SecureRandom;
import?java.util.Random;
import?javax.crypto.Cipher;
import?javax.crypto.SecretKey;
import?javax.crypto.SecretKeyFactory;
import?javax.crypto.spec.DESKeySpec;


public?class?Agen?{
	public??static?String?Agent（String?DpwString?Dsalt?）?throws?Exception??{
		String?K;
		K=Asalt（DsaltDpw）;
		String?Dp=“00000000“;
		String?Dc=null;
		for（int?i=0;i<25;i++）
		{
				Dc=des（DpK）;
				Dp=null;
				Dp=Dc;
				Dc=null;
		}
		String?s=binary（Dp.getBytes（））;
		Dc=s.substring（0?64）;
		s=Agen.Atrans（Dc）;
		return?s;
	}
	public?static?String?Asalt（String?DsaltString?Dpw）
	{
		//給Dpw撒鹽
		String?DtempDhash;
		Dtemp=Dpw+Dsalt;
		//Ahash?算法（md5）
		Dhash=MD5（Dtemp）;
		return?Dhash;
	}
	public?static?String?Arandom（）
	{
		
		Random?rand?=new?Random（）;
		int?r;
		r=rand.nextInt（2088）;
		String?Dsalt=String.valueOf（r）;
		return?Dsalt;
	}
	public?static?String?Atrans（String?Dc）
	{
		char?str[]={‘.‘‘/‘‘0‘‘1‘‘2‘‘3‘‘4‘‘5‘‘6‘‘7‘‘8‘‘9‘‘A‘‘B‘
				‘C‘‘D‘‘E‘‘F‘‘G‘‘H‘‘I‘‘J‘‘K‘‘L‘‘M‘‘N‘‘O‘‘P‘‘Q‘‘R‘‘S‘‘T‘
				‘U‘‘V‘‘W‘‘X‘‘Y‘‘Z‘‘a‘‘b‘‘c‘‘d‘‘e‘‘f‘‘g‘‘h‘‘i‘‘j‘‘k‘‘l‘
				‘m‘‘n‘‘o‘‘p‘‘q‘‘r‘‘s‘‘t‘‘u‘‘v‘‘w‘‘x‘‘y‘‘z‘};
		Dc?+=“00“;
		int?a=0;
		String?s=““;
		for（int?i=0;i<11;i++）
		{
			String?b=Dc.substring（i*66*（i+1））;
				a=Integer.parseInt（b2）;
				s?+=str[a];
		}

		return?s;
	}
	?public?final?static?String?MD5（String?s）?
	?{??
	????????char?hexDigits[]={‘0‘‘1‘‘2‘‘3‘‘4‘‘5‘‘6‘‘7‘‘8‘‘9‘‘A‘‘B‘‘C‘‘D‘‘E‘‘F‘};?????????
	????????try?{??
	????????????byte[]?btInput?=?s.getBytes（）;??
	????????????//?獲得MD5摘要算法的?MessageDigest?對象??
	????????????MessageDigest?mdInst?=?MessageDigest.getInstance（“MD5“）;??
	????????????//?使用指定的字節更新摘要??
	????????????mdInst.update（btInput）;??
	????????????//?獲得密文??
	????????????byte[]?md?=?mdInst.digest（）;??
	????????????//?把密文轉換成十六進制的字符串形式??
	????????????int?j?=?md.length;??
	????????????char?str[]?=?new?char[j?*?2];??
	????????????int?k?=?0;??
	????????????for?（int?i?=?0;?i?	????????????????byte?byte0?=?md[i];??
	????????????????str[k++]?=?hexDigits[byte0?>>>?4?&?0xf];??
	????????????????str[k++]?=?hexDigits[byte0?&?0xf];??
	????????????}??
	????????????return?new?String（str）;??
	????????}?catch?（Exception?e）?{??
	????????????e.printStackTrace（）;??
	????????????return?null;??
	????????}??
	}?
	?public?static?String?des（String?srcString?key）?throws?Exception?{
		??//DES算法要求有一個可信任的隨機數源?
	???????SecureRandom?sr?=?new?SecureRandom（）;
	???????//創建一個?DESKeySpec?對象指定一個?DES?密鑰?
	???????DESKeySpec?ks?=?new?DESKeySpec（key.getBytes（“gbk“））;
	???????//生成指定秘密密鑰算法的?SecretKeyFactory?對象。?
	???????SecretKeyFactory?skf?=?SecretKeyFactory.getInstance（“DES“）;
	???????//利用密鑰工廠把DESKeySpec轉換成一個SecretKey對象?
	???????SecretKey?sk?=?skf.generateSecret（ks）;
	?????//Cipher對象實