前后端 crypto-js AES 对称加解密

本文使用的 AES/ECB模式

Java 加解密

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import java.math.BigInteger;
import java.nio.charset.StandardCharsets;

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

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang3.StringUtils;

import sun.misc.BASE64Decoder;

/**
* AES的加密和解密
*
* @author dgb8901
*/
public class AesUtil {
//密钥 前后端一致
private static final String KEY = "0abcdefghicklmnopquvwxyz";
//算法
private static final String ALGORITHMSTR = "AES/ECB/PKCS5Padding";

/**
* aes加密
*
* @param content 要加密的内容
* @return
* @throws Exception
*/
public static String aesEncrypt(String content) {
try {
return aesEncrypt(content, KEY);
} catch (Exception e) {
e.printStackTrace();
return "";
}
}

/**
* aes解密
*
* @param encrypt 加密内容
* @return
* @throws Exception
*/
public static String aesDecrypt(String encrypt) {
try {
return aesDecrypt(encrypt, KEY);
} catch (Exception e) {
e.printStackTrace();
return "";
}
}

/**
* 将byte[]转为各种进制的字符串
*
* @param bytes byte[]
* @param radix 可以转换进制的范围,从Character.MIN_RADIX到Character.MAX_RADIX,超出范围后变为10进制
* @return 转换后的字符串
*/
public static String binary(byte[] bytes, int radix) {
return new BigInteger(1, bytes).toString(radix);// 这里的1代表正数
}

/**
* base 64 encode
*
* @param bytes 待编码的byte[]
* @return 编码后的base 64 code
*/
public static String base64Encode(byte[] bytes) {
return Base64.encodeBase64String(bytes);
}

/**
* base 64 decode
*
* @param base64Code 待解码的base 64 code
* @return 解码后的byte[]
* @throws Exception
*/
public static byte[] base64Decode(String base64Code) throws Exception {
return StringUtils.isEmpty(base64Code) ? null : new BASE64Decoder().decodeBuffer(base64Code);
}


/**
* AES加密
*
* @param content 待加密的内容
* @param encryptKey 加密密钥
* @return 加密后的byte[]
* @throws Exception
*/
public static byte[] aesEncryptToBytes(String content, String encryptKey) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128);
Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes(), "AES"));

return cipher.doFinal(content.getBytes(StandardCharsets.UTF_8));
}


/**
* AES加密为base 64 code
*
* @param content 待加密的内容
* @param encryptKey 加密密钥
* @return 加密后的base 64 code
* @throws Exception
*/
public static String aesEncrypt(String content, String encryptKey) throws Exception {
return base64Encode(aesEncryptToBytes(content, encryptKey));
}

/**
* AES解密
*
* @param encryptBytes 待解密的byte[]
* @param decryptKey 解密密钥
* @return 解密后的String
* @throws Exception
*/
public static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128);

Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes(), "AES"));
byte[] decryptBytes = cipher.doFinal(encryptBytes);
return new String(decryptBytes);
}


/**
* 将base 64 code AES解密
*
* @param encryptStr 待解密的base 64 code
* @param decryptKey 解密密钥
* @return 解密后的string
* @throws Exception
*/
public static String aesDecrypt(String encryptStr, String decryptKey) throws Exception {
return StringUtils.isEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr), decryptKey);
}


public static void main(String[] args) throws Exception {
String content = "aaaaa";
System.out.println("加密前:" + content);
System.out.println("加密密钥和解密密钥:" + KEY);
String encrypt = aesEncrypt(content, KEY);
System.out.println("加密后:" + encrypt);
String decrypt = aesDecrypt(encrypt, KEY);
System.out.println("解密后:" + decrypt);
}
}

JavaScript 加解密

Js 的 crypto-js 加密库:crypto-js加密库

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<!DOCTYPE html public "-//W3C//dtd html 4.0 Transitional//en">
<html>
<head>
<meta http-equiv=Content-Type content="text/html;charset=utf-8">
<title>加密</title>
<script src="tripledes.js"></script>
<script src="mode-ecb.js"></script>
<script src="aes.js"></script>
<script type="text/javascript">

function encryptByDES(message, key) {
var srcs = CryptoJS.enc.Utf8.parse(message);
key = CryptoJS.enc.Utf8.parse(key);
var encrypted = CryptoJS.AES.encrypt(srcs, key, {mode:CryptoJS.mode.ECB,padding: CryptoJS.pad.Pkcs7});
return encrypted.toString();
}

function dencryptByDES(data, key) {
var key = CryptoJS.enc.Utf8.parse(key);
var decrypt = CryptoJS.AES.decrypt(data, key, {mode:CryptoJS.mode.ECB,padding: CryptoJS.pad.Pkcs7});
return CryptoJS.enc.Utf8.stringify(decrypt).toString();
}

function code() {
var a = encryptByDES('aaaaa','0abcdefghicklmnopquvwxyz')
console.log(a)
}
function dcode() {
var b = dencryptByDES('OS6iHVFI0hWsN0xv3wovmw==','0abcdefghicklmnopquvwxyz')
console.log(b)
}
</script>
</head>

<body>
<button onClick="code()">加密</button>
<button onClick="dcode()">解密</button>
</body>
</html>

js 加解密需要依赖的 crypto-js 加密库中的三个js文件,tripledes.jsaes.jsmode-ecb.js

参考

原文作者: dgb8901,yinxing

原文链接: https://www.itwork.club/2020/07/02/crypto-js/

版权声明: 转载请注明出处

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