3DES 알고리즘 암호 화 복호화
5315 단어 3DES 알고리즘
package com.common.util.CipherUtil;
import java.io.ByteArrayOutputStream;
import java.io.UnsupportedEncodingException;
import java.security.*;
import javax.crypto.*;
import javax.crypto.spec.SecretKeySpec;
/**
* DESede(3DES) ,
*/
public class TDESUtil
{
private static final String Algorithm = "DESede"; // , DES,DESede,Blowfish
private static final String hexString="0123456789ABCDEF";
/**
*
* @param keybyte , 24
* @param src ( 。 )
* @return
*/
public static byte[] encryptMode(byte[] keybyte, byte[] src)
{
try
{
//
SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);
//
Cipher c1 = Cipher.getInstance(Algorithm);
c1.init(Cipher.ENCRYPT_MODE, deskey);
return c1.doFinal(src);
}
catch (java.security.NoSuchAlgorithmException e1)
{
e1.printStackTrace();
}
catch (javax.crypto.NoSuchPaddingException e2)
{
e2.printStackTrace();
}
catch (java.lang.Exception e3)
{
e3.printStackTrace();
}
return null;
}
/**
*
* @param keybyte
* @param src
* @return
*/
public static byte[] decryptMode(byte[] keybyte, byte[] src)
{
try
{
//
SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);
//
Cipher c1 = Cipher.getInstance(Algorithm);
c1.init(Cipher.DECRYPT_MODE, deskey);
return c1.doFinal(src);
}
catch (java.security.NoSuchAlgorithmException e1)
{
e1.printStackTrace();
}
catch (javax.crypto.NoSuchPaddingException e2)
{
e2.printStackTrace();
}
catch (java.lang.Exception e3)
{
e3.printStackTrace();
}
return null;
}
/**
* 16
* @param str
* @return
*/
public static String encode(String str)
{
//
byte[] bytes=str.getBytes();
StringBuilder sb=new StringBuilder(bytes.length*2);
// 2 16
for(int i=0;i<bytes.length;i++)
{
sb.append(hexString.charAt((bytes[i]&0xf0)>>4));
sb.append(hexString.charAt((bytes[i]&0x0f)>>0));
}
return sb.toString();
}
/**
*
* @param bytes
* @return
* 16 , ( )
*/
public static String decode(String bytes)
{
ByteArrayOutputStream baos=new ByteArrayOutputStream(bytes.length()/2);
// 2 16
for(int i=0;i<bytes.length();i+=2)
baos.write((hexString.indexOf(bytes.charAt(i))<<4 |hexString.indexOf(bytes.charAt(i+1))));
return new String(baos.toByteArray());
}
//
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;
if (n < b.length - 1)
hs = hs + ":";
}
return hs.toUpperCase();
}
public static void main(String[] args) throws UnsupportedEncodingException
{
// , JCE
// addProvider ( , )
Security.addProvider(new com.sun.crypto.provider.SunJCE());
//
// String szSrc = "This is a 3DES test. ";
String sourcePlatformID = "110000" ;
String userID = "21" ;
String date = "1350008287462" ;
String randomNum = "123456";
String ticket = sourcePlatformID + "&" + userID + "&" + date +randomNum ;
System.out.println(" :" + ticket);
//
String aString = "123456123456123456123456";
//
final byte[] keyBytes = { 0x11, 0x22, 0x4F, 0x58, (byte)0x88, 0x10,
0x40, 0x38, 0x28, 0x25, 0x79, 0x51, (byte) 0xCB, (byte) 0xDD,
0x55, 0x66, 0x77, 0x29, 0x74, (byte) 0x98, 0x30, 0x40, 0x36,
(byte) 0xE2 };
byte[] encoded = encryptMode(aString.getBytes(), ticket.getBytes());
System.out.println(" :" + new String(encoded,"UTF8"));
byte[] srcBytes = decryptMode(aString.getBytes(), encoded);
System.out.println(" :" + new String(srcBytes));
/*------------------------------------------------------------*/
String byt=" 16 ";
byt=encode(byt);
System.out.println(" 16 : "+byt);
byt=decode(byt);
System.out.println("16 : "+byt);
}
}