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JAVA实现AES加密算法

程序员文章站 2022-07-10 15:29:13
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介绍

高级加密标准(英语:Advanced Encryption Standard,缩写:AES),在密码学中又称Rijndael加密法,是美国联邦*采用的一种区块加密标准。这个标准用来替代原先的DES,已经被多方分析且广为全世界所使用。经过五年的甄选流程,高级加密标准由美国国家标准与技术研究院(NIST)于2001年11月26日发布于FIPS PUB 197,并在2002年5月26日成为有效的标准。2006年,高级加密标准已然成为对称**加密中最流行的算法之一

源码

package com.sto.orderpush.util;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.lang3.StringUtils;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class AESCoder{
	private static final String ivStr = "43720ui239062387";
    public static String encrypt(String strKey, String strIn) throws Exception {
    	if(StringUtils.isEmpty(strKey)) {
    		throw new Exception("decrypt string can't null or empty");
    	}
    	if(StringUtils.isEmpty(strIn)) {
    		throw new Exception("decrypt string can't null or empty");
    	}
    	
        SecretKeySpec skeySpec = getKey(strKey);
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        IvParameterSpec iv = new IvParameterSpec(ivStr.getBytes());
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
        byte[] encrypted = cipher.doFinal(strIn.getBytes("utf-8"));
        BASE64Encoder encoder = new BASE64Encoder();
        return encoder.encode(encrypted);
    }
 
    public static String decrypt(String strKey, String strIn) throws Exception {
    	if(StringUtils.isEmpty(strKey)) {
    		throw new Exception("decrypt string can't null or empty");
    	}
    	if(StringUtils.isEmpty(strIn)) {
    		throw new Exception("decrypt string can't null or empty");
    	}
    	
        SecretKeySpec skeySpec = getKey(strKey);
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        IvParameterSpec iv = new IvParameterSpec(ivStr.getBytes());
        cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
        
        BASE64Decoder decoder = new BASE64Decoder();
        byte[] encrypted1 = decoder.decodeBuffer(strIn);
        byte[] original = cipher.doFinal(encrypted1);
        String originalString = new String(original, "utf-8");
        return originalString;
    }
 
    private static SecretKeySpec getKey(String strKey) throws Exception {
        byte[] arrBTmp = strKey.getBytes();
        byte[] arrB = new byte[16]; // 创建一个空的16位字节数组(默认值为0)
        for (int i = 0; i < arrBTmp.length && i < arrB.length; i++) {
            arrB[i] = arrBTmp[i];
        }
        SecretKeySpec skeySpec = new SecretKeySpec(arrB, "AES");
 
        return skeySpec;
    }
 
    public static void main(String[] args) throws Exception {
        String Code = "中文ABc123";
        String key = "[email protected]";
        String codE;
        codE = AESCoder.encrypt(key, Code);
        System.out.println("原文:" + Code);
        System.out.println("**:" + key);
        System.out.println("密文:" + codE);
        System.out.println("解密:" + AESCoder.decrypt(key, codE));
    }
}

相关标签: AES Java