AES
package com.sondon.NettyDemo;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.apache.log4j.Logger;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
/**
*
* @Project : NettyDemo
* @Package : com.sondon.NettyDemo
* @Class : AESTool.java
* @Company 广州讯动网络科技有限公司
* @Author : 蔡文锋
* @DateTime:2015年4月16日 上午9:38:31
* @Blog:http://blog.csdn.net/caiwenfeng_for_23
* @Description : {
* AESTool工具
* }
*/
public class AESTool {
protected static final Logger log = Logger.getLogger(AESTool.class);
private byte[] initVector = { 0x32, 0x37, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31,
0x38, 0x27, 0x36, 0x35, 0x33, 0x23, 0x32, 0x31 };
/**
* FIXME For demo only, should rewrite this method in your product environment!
*
* @param appid
* @return
*/
public static String findKeyById(String appid) {
// Fake key.
String key = "12345678901234567890123456789012";
return key;
}
// 加密
public static String Encrypt(String sSrc, String sKey) throws Exception {
if (sKey == null) {
System.out.print("Key为空null");
return null;
}
// 判断Key是否为16位
if (sKey.length() != 16) {
System.out.print("Key长度不是16位");
return null;
}
byte[] raw = sKey.getBytes();
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");//"算法/模式/补码方式"
IvParameterSpec iv = new IvParameterSpec("0102030405060708".getBytes());//使用CBC模式,需要一个向量iv,可增加加密算法的强度
cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
byte[] encrypted = cipher.doFinal(sSrc.getBytes());
return new BASE64Encoder().encode(encrypted);//此处使用BASE64做转码功能,同时能起到2次加密的作用。
}
// 解密
public static String decrypt(String sSrc, String sKey) throws Exception {
try {
// 判断Key是否正确
if (sKey == null) {
System.out.print("Key为空null");
return null;
}
// 判断Key是否为16位
if (sKey.length() != 16) {
System.out.print("Key长度不是16位");
return null;
}
byte[] raw = sKey.getBytes("UTF-8");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
IvParameterSpec iv = new IvParameterSpec("0102030405060708"
.getBytes());
cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);//先用base64解密
try {
byte[] original = cipher.doFinal(encrypted1);
String originalString = new String(original);
return originalString;
} catch (Exception e) {
System.out.println(e.toString());
return null;
}
} catch (Exception ex) {
System.out.println(ex.toString());
return null;
}
}
public static void main(String[] args) throws Exception {
/*
* 加密用的Key 可以用26个字母和数字组成,最好不要用保留字符,虽然不会错,至于怎么裁决,个人看情况而定
* 此处使用AES-128-CBC加密模式,key需要为16位。
*/
String cKey = "1234567890abcdef";
// 需要加密的字串
String cSrc = "user=15063142270,pwd=110120";
System.out.println(cSrc);
// 加密
long lStart = System.currentTimeMillis();
String enString = AESTool.Encrypt(cSrc, cKey);
System.out.println("加密后的字串是:" + enString);
long lUseTime = System.currentTimeMillis() - lStart;
System.out.println("加密耗时:" + lUseTime + "毫秒");
// 解密
lStart = System.currentTimeMillis();
String DeString = AESTool.decrypt("etv++JDJX9cLbah7dcqF+9i+kRNzWzV9io+CUy8Tq0U==", cKey);
System.out.println("解密后的字串是:" + DeString);
lUseTime = System.currentTimeMillis() - lStart;
System.out.println("解密耗时:" + lUseTime + "毫秒");
}
}
时间: 2024-10-06 20:32:38