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DESUtils.java
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package com.JUtils.encrypt;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
/**
* DES加解密工具类
*
* @Author:chenssy
* @date:2016年5月20日 下午5:19:00
*
*/
class DESUtils {
/** 默认key */
protected final static String KEY = "ScAKC0XhadTHT3Al0QIDAQAB";
/**
* DES加密
*
* @author : chenssy
* @date : 2016年5月20日 下午5:51:37
*
* @param data
* 待加密字符串
* @param key
* 校验位
* @return
*/
@SuppressWarnings("restriction")
protected static String encrypt(String data,String key) {
String encryptedData = null;
try {
// DES算法要求有一个可信任的随机数源
SecureRandom sr = new SecureRandom();
DESKeySpec deskey = new DESKeySpec(key.getBytes());
// 创建一个密匙工厂,然后用它把DESKeySpec转换成一个SecretKey对象
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey secretKey = keyFactory.generateSecret(deskey);
// 加密对象
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.ENCRYPT_MODE, secretKey, sr);
// 加密,并把字节数组编码成字符串
encryptedData = new sun.misc.BASE64Encoder().encode(cipher.doFinal(data.getBytes()));
} catch (Exception e) {
throw new RuntimeException("加密错误,错误信息:", e);
}
return encryptedData;
}
/**
* DES解密
*
* @author : chenssy
* @date : 2016年5月20日 下午5:52:23
*
* @param cryptData
* 待解密密文
* @param key
* 校验位
* @return
*/
@SuppressWarnings("restriction")
protected static String decrypt(String cryptData,String key) {
String decryptedData = null;
try {
// DES算法要求有一个可信任的随机数源
SecureRandom sr = new SecureRandom();
DESKeySpec deskey = new DESKeySpec(key.getBytes());
// 创建一个密匙工厂,然后用它把DESKeySpec转换成一个SecretKey对象
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey secretKey = keyFactory.generateSecret(deskey);
// 解密对象
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.DECRYPT_MODE, secretKey, sr);
// 把字符串解码为字节数组,并解密
decryptedData = new String(cipher.doFinal(new sun.misc.BASE64Decoder().decodeBuffer(cryptData)));
} catch (Exception e) {
throw new RuntimeException("解密错误,错误信息:", e);
}
return decryptedData;
}
}