JAVA实现AES加密算法
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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));
}
}