package com.stone.security;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;
/**
* 三重加密 3DES也作 Triple DES,
*
* @author stone
* @date 2014-03-10 02:14:37
*/
public class TripleDES {
// 算法名称
public static final String KEY_ALGORITHM = "DESede";
// 算法名称/加密模式/填充方式
public static final String CIPHER_ALGORITHM_ECB = "DESede/ECB/PKCS5Padding";
public static final String CIPHER_ALGORITHM_CBC = "DESede/CBC/PKCS5Padding";
private KeyGenerator keyGen;
private SecretKey secretKey;
private SecretKey secretKey2;
private Cipher cipher;
private static byte[] encryptData;
public static void main(String[] args) throws Exception {
TripleDES tripleDES = new TripleDES("ECB");
tripleDES.encrypt("sau8jzxlcvm,'123`98(*^&%^^JCB ZX>>A<S<}}{");
System.out.println("加密后:" + new String(encryptData));
System.out.println("解密后:"+ new String(tripleDES.decrypt(encryptData)));
tripleDES = new TripleDES("CBC");
tripleDES.encrypt2("sau8jzxlc DQV#><«|vm,'123`98(*^&%^^JCB ZX>>A<S<}}{");
System.out.println("加密后:" + new String(encryptData));
System.out.println("解密后:"+ new String(tripleDES.decrypt2(encryptData)));
}
public TripleDES(String mode) throws Exception {
if ("ECB".equals(mode)) {
// cipher = Cipher.getInstance(KEY_ALGORITHM);
cipher = Cipher.getInstance(CIPHER_ALGORITHM_ECB);
keyGen = KeyGenerator.getInstance(KEY_ALGORITHM);
secretKey = keyGen.generateKey();
} else if("CBC".equals(mode)) {
cipher = Cipher.getInstance(CIPHER_ALGORITHM_CBC);
keyGen = KeyGenerator.getInstance(KEY_ALGORITHM);
DESedeKeySpec spec = new DESedeKeySpec(keyGen.generateKey().getEncoded());
secretKey2 = SecretKeyFactory.getInstance(KEY_ALGORITHM).generateSecret(spec);
}
}
/**
* 加密
* @param str
* @return
* @throws Exception
*/
public byte[] encrypt(String str) throws Exception {
cipher.init(Cipher.ENCRYPT_MODE, secretKey);
return encryptData = cipher.doFinal(str.getBytes());
}
/**
* 解密
* @param encrypt
* @return
* @throws Exception
*/
public byte[] decrypt(byte[] encrypt) throws Exception {
cipher.init(Cipher.DECRYPT_MODE, secretKey);
return encryptData = cipher.doFinal(encrypt);
}
byte[] getIV() {
return "administ".getBytes();
}
/**
* 加密
* @param str
* @return
* @throws Exception
*/
public byte[] encrypt2(String str) throws Exception {
cipher.init(Cipher.ENCRYPT_MODE, secretKey2, new IvParameterSpec(getIV()));
return encryptData = cipher.doFinal(str.getBytes());
}
/**
* 解密
* @param encrypt
* @return
* @throws Exception
*/
public byte[] decrypt2(byte[] encrypt) throws Exception {
cipher.init(Cipher.DECRYPT_MODE, secretKey2, new IvParameterSpec(getIV()));
return encryptData = cipher.doFinal(encrypt);
}
}
版权说明 : 本文为转载文章, 版权归原作者所有 版权申明
原文链接 : https://stone.blog.csdn.net/article/details/20939713
内容来源于网络,如有侵权,请联系作者删除!