[セットトップ]パスワード暗号化、ツールクラスの復号化
4278 ワード
package com.baosight.efmpx.system.util;
import java.security.*;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
/**
* ，
* @author
*
*/
public final class EncryptUtil {
private static final String PASSWORD_CRYPT_KEY = "__jDlog_";
private final static String DES = "DES";
/**
*
* @param src
* @param key ， 8
* @return
* @throws Exception
*/
public static byte[] encrypt(byte[] src, byte[] key)throws Exception {
//DES
SecureRandom sr = new SecureRandom();
// DESKeySpec
DESKeySpec dks = new DESKeySpec(key);
// ， DESKeySpec
// SecretKey
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
// Cipher
Cipher cipher = Cipher.getInstance(DES);
// Cipher
cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
// ，
//
return cipher.doFinal(src);
}
/**
*
* @param src
* @param key ， 8
* @return
* @throws Exception
*/
public static byte[] decrypt(byte[] src, byte[] key)throws Exception {
// DES
SecureRandom sr = new SecureRandom();
// DESKeySpec
DESKeySpec dks = new DESKeySpec(key);
// ， DESKeySpec
// SecretKey
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
// Cipher
Cipher cipher = Cipher.getInstance(DES);
// Cipher
cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
// ，
//
return cipher.doFinal(src);
}
/**
*
* @param data
* @return
* @throws Exception
*/
public final static String decrypt(String data){
try {
return new String(decrypt(hex2byte(data.getBytes()),
PASSWORD_CRYPT_KEY.getBytes()));
}catch(Exception e) {
}
return null;
}
/**
*
* @param password
* @return
* @throws Exception
*/
public final static String encrypt(String password){
try {
return byte2hex(encrypt(password.getBytes(),PASSWORD_CRYPT_KEY.getBytes()));
}catch(Exception e) {
}
return null;
}
/**
*
* @param b
* @return
*/
public 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();
}
public static byte[] hex2byte(byte[] b) {
if((b.length%2)!=0)
throw new IllegalArgumentException(" ");
byte[] b2 = new byte[b.length/2];
for (int n = 0; n < b.length; n+=2) {
String item = new String(b,n,2);
b2[n/2] = (byte)Integer.parseInt(item,16);
}
return b2;
}
public static void main(String[] args) {
String s = "002400";
String ss = EncryptUtil.encrypt(s);
String sss = EncryptUtil.decrypt(ss);
System.out.println(s);
System.out.println(ss);
System.out.println(sss);
}
}