本文实例为大家分享了java实现aes可逆加密算法的具体代码,供大家参考,具体内容如下
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package com.hdu.encode;
import javax.crypto.cipher;
import javax.crypto.spec.ivparameterspec;
import javax.crypto.spec.secretkeyspec;
import sun.misc.base64decoder;
import sun.misc.base64encoder;
/**
* aes 是一种可逆加密算法,对用户的敏感信息加密处理 对原始数据进行aes加密后,在进行base64编码转化;
*/
public class aesoperator {
/*
* 加密用的key 可以用26个字母和数字组成 此处使用aes-128-cbc加密模式,key需要为16位。
*/
// a0b891c2d563e4f7
private string skey = "abcdef0123456789" ;
private string ivparameter = "0123456789abcdef" ;
private static aesoperator instance = null ;
private aesoperator() {
}
public static aesoperator getinstance() {
if (instance == null )
instance = new aesoperator();
return instance;
}
// 加密
public string encrypt(string ssrc){
string result = "" ;
try {
cipher cipher;
cipher = cipher.getinstance( "aes/cbc/pkcs5padding" );
byte [] raw = skey.getbytes();
secretkeyspec skeyspec = new secretkeyspec(raw, "aes" );
ivparameterspec iv = new ivparameterspec(ivparameter.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( "utf-8" ));
result = new base64encoder().encode(encrypted);
} catch (exception e) {
e.printstacktrace();
}
// 此处使用base64做转码。
return result;
}
// 解密
public string decrypt(string ssrc){
try {
byte [] raw = skey.getbytes( "ascii" );
secretkeyspec skeyspec = new secretkeyspec(raw, "aes" );
cipher cipher = cipher.getinstance( "aes/cbc/pkcs5padding" );
ivparameterspec iv = new ivparameterspec(ivparameter.getbytes());
cipher.init(cipher.decrypt_mode, skeyspec, iv);
byte [] encrypted1 = new base64decoder().decodebuffer(ssrc); // 先用base64解密
byte [] original = cipher.dofinal(encrypted1);
string originalstring = new string(original, "utf-8" );
return originalstring;
} catch (exception ex) {
ex.printstacktrace();
return null ;
}
}
public static void main(string[] args){
// 需要加密的字串
string csrc = "测试" ;
system.out.println(csrc + " 长度为" + csrc.length());
// 加密
long lstart = system.currenttimemillis();
string enstring = aesoperator.getinstance().encrypt(csrc);
system.out.println( "加密后的字串是:" + enstring + "长度为" + enstring.length());
long lusetime = system.currenttimemillis() - lstart;
system.out.println( "加密耗时:" + lusetime + "毫秒" );
// 解密
lstart = system.currenttimemillis();
string destring = aesoperator.getinstance().decrypt(enstring);
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" );
}
}
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以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/u011768325/article/details/40391045