package com.snowcattle.game.common.util;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.KeySpec;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
public class DesEncrypter {
Cipher ecipher;
Cipher dcipher;
// 8-byte Salt
byte[] salt = { (byte) 0xB9, (byte) 0xAB, (byte) 0xD8, (byte) 0x42, (byte) 0x66, (byte) 0x45, (byte) 0xF3,
(byte) 0x13 };
// Iteration count
int iterationCount = 17;
public DesEncrypter(String passPhrase) {
this(passPhrase, null);
}
public DesEncrypter(String passPhrase, byte[] newSalt) {
try {
if (newSalt != null) {
salt = newSalt;
}
// Create the key
KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), salt, iterationCount);
SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(keySpec);
ecipher = Cipher.getInstance(key.getAlgorithm());
dcipher = Cipher.getInstance(key.getAlgorithm());
// Prepare the parameter to the ciphers
AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);
// Create the ciphers
ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
} catch (java.security.InvalidAlgorithmParameterException e) {
} catch (java.security.spec.InvalidKeySpecException e) {
} catch (javax.crypto.NoSuchPaddingException e) {
} catch (java.security.NoSuchAlgorithmException e) {
} catch (java.security.InvalidKeyException e) {
}
}
public String encrypt(String str) {
try {
// Encode the string into bytes using utf-8
byte[] utf8 = str.getBytes("UTF8");
// Encrypt
byte[] enc = ecipher.doFinal(utf8);
// Encode bytes to base64 to get a string
return new sun.misc.BASE64Encoder().encode(enc);
} catch (javax.crypto.BadPaddingException e) {
} catch (IllegalBlockSizeException e) {
} catch (java.io.IOException e) {
}
return null;
}
public String decrypt(String str) {
try {
// Decode base64 to get bytes
byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(str);
// Decrypt
byte[] utf8 = dcipher.doFinal(dec);
// Decode using utf-8
return new String(utf8, "UTF8");
} catch (javax.crypto.BadPaddingException e) {
} catch (IllegalBlockSizeException e) {
} catch (java.io.IOException e) {
}
return null;
}
// private static DesEncrypter encrypter = new DesEncrypter("4DP2bC5r",
// new byte[]{(byte)0x62, (byte)0xB1, (byte)0x35, (byte)0xF8, (byte)0xC6, (byte)0x5A, (byte)0x44, (byte)0xE2});
//
// public static String encodeToken(long accountId, String ip, long timestamp, String name){
// return encrypter.encrypt(accountId+","+ip+","+timestamp+","+name);
// }
//
// // 根据Token结出account和时间戳
// public static String decodeToken(String token){
// return encrypter.decrypt(token);
// }
public static void main(String[] args){
// String token = encodeToken(1001, "127.0.0.1", System.currentTimeMillis(), "jackflit");
// String msg = decodeToken(token);
// System.out.println(msg);
// DesEncrypter encrypter = new DesEncrypter("4DP2bC5r");
// String message = "lool";
// String msg = encrypter.encrypt(message);
// System.out.println(msg);
// String msg2 = encrypter.decrypt(msg);
// System.out.println(msg2);
}
}