AES加密和解密-CryptoJS和Java

冷不防 2021-12-24 07:53 684阅读 0赞

--------------------

title: “AES加密和解密-CryptoJS和Java”

url: “[https://wsk1103.github.io/][https_wsk1103.github.io]”

tags:

*  学习笔记
 *  算法

--------------------

**AES**（Advanced Encryption Standard，高级加密标准）是一种对称加密算法，加密和解密使用相同的密钥

CryptoJS[：https://github.com/brix/crypto-js][https_github.com_brix_crypto-js]

# 使用16进制加密解密 #

## 1. 前端AES加密，后端AES解密 ##

#### 前端 ####

其中和加密相关的js从GitHub下载。

<!doctype html>
    <html lang="en">
    <head>
        <meta charset="utf-8">
        <title>AES TEST</title>
    </head>
    <body>
    <p>go</p>
    <script src="core.js"></script>
    <script src="cipher-core.js"></script>
    <script src="mode-ecb.js"></script>
    <script src="aes.js"></script>
    
    <script>
        var key = CryptoJS.enc.Utf8.parse("1538663015386630");  
        var plaintText = 'wsk-test'; // 明文  
    	var encrypted = "a551e4d54cfc396cc93c89dd55f6587c";
        var encryptedData = CryptoJS.AES.encrypt(plaintText, key, {  
            mode: CryptoJS.mode.ECB,  
            padding: CryptoJS.pad.Pkcs7  
        });  
    
    	var a = plaintText + '';//加密前：
    	var b = encryptedData + '';//加密后：
        console.log("加密前："+plaintText + '');  
        console.log("加密后："+encryptedData + '');  
     
        alert("加密前："+a);
        alert("加密后："+b);
    </script>
    </body>
    </html>

#### 后台解密 ####

/**
         * PKCS5Padding -- Pkcs7 两种padding方法都可以
         *
         * @param content 69f23a1a98ca3d406692742ab7033f3b  16进制
         * @param key     1538663015386630
         * @return masget2019
         */
        public static String decryptAES(String content, String key) {
            try {
                SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "AES");
                // "算法/模式/补码方式"
                Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
                cipher.init(Cipher.DECRYPT_MODE, skeySpec);
                //解密后是16进制
                return new String(cipher.doFinal(parseHexStr2Byte(content)));
            } catch (Exception e) {
                log.error(String.format("解密失败:，content：%s, key: %s", content, key));
            }
            return content;
        }
        
        /**
         * 将16进制转换为二进制
         *
         * @param hexStr
         * @return
         */
        private static byte[] parseHexStr2Byte(String hexStr) {
            if (hexStr.length() < 1) {
                return null;
            }
            byte[] result = new byte[hexStr.length() / 2];
            for (int i = 0; i < hexStr.length() / 2; i++) {
                int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16);
                int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2), 16);
                result[i] = (byte) (high * 16 + low);
            }
            return result;
        }

## 后台AES加密，前端AES解密 ##

#### 后台加密 ####

/**
         * 加密
         *
         * @param content
         * @param key
         * @return
         */
        public static String encryptAES(String content, String key) {
            try {
                SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "AES");
                // "算法/模式/补码方式"
                Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
                cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
                byte[] result = cipher.doFinal(content.getBytes(StandardCharsets.UTF_8));
                return parseByte2HexStr(result);
            } catch (Exception e) {
                log.error(String.format("加密失败:，content：%s, key: %s", content, key));
            }
            return content;
        }
        /**
         * 将二进制转换成16进制
         *
         * @param buf
         * @return
         */
        public static String parseByte2HexStr(byte[] buf) {
            StringBuilder sb = new StringBuilder();
            for (byte b : buf) {
                String hex = Integer.toHexString(b & 0xFF);
                if (hex.length() == 1) {
                    hex = '0' + hex;
                }
                sb.append(hex.toUpperCase());
            }
            return sb.toString();
        }

#### 前端解密 ####

<!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
     
    </head>
     
    <script src="core.js"></script>
    <script src="enc-base64.js"></script>
    <script src="cipher-core.js"></script>
    <script src="mode-ecb.js"></script>
    <script src="aes.js"></script>
    <body>
    <script>
    
        var key = CryptoJS.enc.Utf8.parse("1538663015386630"); //秘钥
     
    	var wsk = "a551e4d54cfc396cc93c89dd55f6587c"; //后台返回的加密字符串
        var encryptedHexStr = CryptoJS.enc.Hex.parse(wsk);//a551e4d54cfc396cc93c89dd55f6587c
        var encryptedBase64Str = CryptoJS.enc.Base64.stringify(encryptedHexStr);
     
        var decryptedData = CryptoJS.AES.decrypt(encryptedBase64Str, key, {
            mode: CryptoJS.mode.ECB,
            padding: CryptoJS.pad.Pkcs7
        });
     
        var decryptedStr = decryptedData.toString(CryptoJS.enc.Utf8);
     
        console.log("解密后:"+decryptedStr);
    </script>
    </body>
    </html>

注意，前端解密中的 **enc-base64.js** 不能导入到加密的html里面，否则加密后的结果不是 **16进制的形式**

# 使用base64加密解密 #

/**
         * 加密，生成的16进制的字符串
         *
         * @param content
         * @param key
         * @return
         */
        public static String encryptAES(String content, String key) {
            try {
                SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "AES");
                // "算法/模式/补码方式"
                Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
                cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
                byte[] result = cipher.doFinal(content.getBytes(StandardCharsets.UTF_8));
                return parseByte2HexStr(result);
            } catch (Exception e) {
                log.error(String.format("加密失败:，content：%s, key: %s", content, key));
            }
            return content;
        }
    
        /**
         * 加密，生成的base64的字符串
         *
         * @param content
         * @param key
         * @return
         */
        public static String encryptAESWithBase64(String content, String key) {
            try {
                SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "AES");
                // "算法/模式/补码方式"
                Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
                cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
                byte[] result = cipher.doFinal(content.getBytes(StandardCharsets.UTF_8));
                return Base64.encodeBase64String(result);
            } catch (Exception e) {
                log.error(String.format("加密失败:，content：%s, key: %s", content, key));
            }
            return content;
        }

## 前端加密 ##

<!doctype html>
    <html lang="en">
    <head>
        <meta charset="utf-8">
        <title>AES TEST</title>
    </head>
    <script src="http://raw.githack.com/brix/crypto-js/develop/src/core.js"></script>
    
    <script src="http://raw.githack.com/brix/crypto-js/develop/src/enc-base64.js"></script>
    
    <script src="http://raw.githack.com/brix/crypto-js/develop/src/cipher-core.js"></script>
    <script src="http://raw.githack.com/brix/crypto-js/develop/src/mode-ecb.js"></script>
    <script src="http://raw.githack.com/brix/crypto-js/develop/src/aes.js"></script>
    
    <script
      src="http://code.jquery.com/jquery-2.2.4.min.js"
      integrity="sha256-BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44="
      crossorigin="anonymous"></script>
      
    <body>
      加密前：<div id="one"></div>
     <br/>
    
     秘钥：<div id="two"></div>
       <br/>
     加密后：<div id="three"></div>
    
    <script>
    
    	var tt = "1538663015386630";
        var key = CryptoJS.enc.Utf8.parse(tt);  //秘钥
        var plaintText = 'test'; // 明文  
        var encryptedData = CryptoJS.AES.encrypt(plaintText, key, {  
            mode: CryptoJS.mode.ECB,  
            padding: CryptoJS.pad.Pkcs7  
        });  
    
    	var a = plaintText + '';//加密前：
    	var b = encryptedData + '';//加密后：
    	console.log("加密前："+plaintText + '');  
    	console.log("加密后："+encryptedData + '');  
     
    	//alert("加密前："+a);
    	//alert("加密后："+b);
    	$(document).ready(function(){
    		$("#one").text(a);
    	});
    	$(document).ready(function(){
    		$("#two").text(tt);
    	});
    	$(document).ready(function(){
    		$("#three").text(b);
    	});
    </script>
    
    </body>
    </html>

## 前端解密 ##

<!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <script src="http://raw.githack.com/brix/crypto-js/develop/src/core.js"></script>
    <script src="http://raw.githack.com/brix/crypto-js/develop/src/enc-base64.js"></script>
    <script src="http://raw.githack.com/brix/crypto-js/develop/src/cipher-core.js"></script>
    <script src="http://raw.githack.com/brix/crypto-js/develop/src/mode-ecb.js"></script>
    <script src="http://raw.githack.com/brix/crypto-js/develop/src/aes.js"></script>
    <script
      src="http://code.jquery.com/jquery-2.2.4.min.js"
      integrity="sha256-BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44="
      crossorigin="anonymous"></script>
    <body>
      解密前：<div id="one"></div>
     <br/>
    
     秘钥：<div id="two"></div>
       <br/>
     解密后：<div id="three"></div>
     
    <script>
    	var tt = "1538663015386630";
        var key = CryptoJS.enc.Utf8.parse(tt); //秘钥
     
    	var wsk = "a551e4d54cfc396cc93c89dd55f6587c"; //后台返回的加密字符串
    	//alert("解密前：" + wsk);
        var encryptedHexStr = CryptoJS.enc.Hex.parse(wsk);
    
        var encryptedBase64Str = CryptoJS.enc.Base64.stringify(encryptedHexStr);
     
        var decryptedData = CryptoJS.AES.decrypt(encryptedBase64Str, key, {
            mode: CryptoJS.mode.ECB,
            padding: CryptoJS.pad.Pkcs7
        });
     
        var decryptedStr = decryptedData.toString(CryptoJS.enc.Utf8);
    	//alert("解密后：" + decryptedStr);
        console.log("解密后:"+decryptedStr);
    	$(document).ready(function(){
    		$("#one").text(wsk);
    	});
    	$(document).ready(function(){
    		$("#two").text(tt);
    	});
    	$(document).ready(function(){
    		$("#three").text(decryptedStr);
    	});
     
    </script>
    </body>
    </html>

[https_wsk1103.github.io]: https://wsk1103.github.io/
[https_github.com_brix_crypto-js]: https://github.com/brix/crypto-js