java ---- 登陆加密

￡神魔★判官ぃ 2022-05-28 02:44 136阅读 0赞

登陆的时候对密码进行加密，然后在后台进行解密

进入页面先会通过一个ajax请求，获取一个随机数key，然后通过密码和随机数进行加密，  
然而感觉这种加密方法并没有什么卵用，，，只不过增加了点难度而已

<%-- Created by IntelliJ IDEA. User: Ming Date: Time: 10:54 To change this template use File | Settings | File Templates. --%>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    
    <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %>
    
    <html>
    <head>
        <base href="<%=basePath%>">
        <title>密码加密</title>
        <script type="text/javascript" src="static/jquery/jquery.min.js"></script>
        <script type="text/javascript" src="static/CryptoJS v3.1.2/rollups/aes.js"></script>
        <script type="text/javascript" src="static/CryptoJS v3.1.2/components/mode-ecb-min.js"></script>
        <link rel="stylesheet" href="static/css/login.css">
    
    </head>
    <body>
    <section class="container">
        <div class="login">
            <form id="loginForm" method="post" action="index.html">
                <p><input type="text" name="username" placeholder="用户名"></p>
                <p><input type="password" name="password" placeholder="密码"></p>
                <p class="submit"><input type="submit" value="登录"></p>
            </form>
        </div>
    </section>
    <script type="text/javascript"> var key = null; $.get("sys/user/random", {}, function(result) { // result.data 进入这个页面请求后台，所返回的一个随机数 key = CryptoJS.enc.Utf8.parse(result.data); }, "json") $(function(){ $("#loginForm").on("submit", function(event){ //获取用户名和密码 var username = $("input[name=username]").val(); var password = $("input[name=password]").val(); //发送ajax请求给服务器 $.post("sys/user/login", { "user.username" : username, // 调用 Encrypt(word) 对密码进行加密 "user.password" : Encrypt(password) }, function(data){ if(data.success){ alert(true) }else{ alert(false) } },"json" ); }); }) function Encrypt(word){ var src = CryptoJS.enc.Utf8.parse(word); var encrypted = CryptoJS.AES.encrypt(src, key, {mode:CryptoJS.mode.ECB,padding: CryptoJS.pad.Pkcs7}); return encrypted.toString(); } </script>
    </body>
    </html>

这是后端代码：

import javax.crypto.Cipher;
    import javax.crypto.KeyGenerator;
    import javax.crypto.spec.SecretKeySpec;
    
    import org.apache.commons.codec.binary.Base64;
    
    import sun.misc.BASE64Decoder;
    
    /** * @author Ming * @date 2018/3/24 10:55 */
    public class TestEncryption{ 
        private static final String KEY = "随机数，但是这个数的长度是需要控制的；比如这个随机数通过MD5加密后，那么运行就会报错，太长了";
        private static final String ALGORITHMSTR = "AES/ECB/PKCS5Padding";
    
        public static String base64Encode(byte[] bytes) {
            return Base64.encodeBase64String(bytes);
        }
    
        public static byte[] base64Decode(String base64Code) throws Exception {
            return new BASE64Decoder().decodeBuffer(base64Code);
        }
    
        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("utf-8"));
        }
    
        public static String aesEncrypt(String content, String encryptKey) throws Exception {
            return base64Encode(aesEncryptToBytes(content, encryptKey));
        }
    
        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);
        }
    
        public static String aesDecrypt(String encryptStr, String decryptKey) throws Exception {
            return aesDecryptByBytes(base64Decode(encryptStr), decryptKey);
        }
    
    
    
        public static void main(String[] args) throws Exception {
            String content = "Test encryption";  
    
            String encrypt = aesEncrypt(content, KEY);
            System.out.println("加密后：" + encrypt);
    
            String decrypt = aesDecrypt(encrypt, KEY);      
            System.out.println("解密后：" + decrypt);
        }
    }

和前端结合起来用的话就是：

public static void main(String[] args) throws Exception {
            String content = user.password;  //这里就是前端加密后传过来的密码
    
            System.out.println("解密后：" + aesDecrypt(encrypt, KEY));   // 解密，通过加密后的密码和我们上面生成的key进行解密
        }

链接：[https://pan.baidu.com/s/19n7uk9i8fvdrXCeN4iG9xA][https_pan.baidu.com_s_19n7uk9i8fvdrXCeN4iG9xA] 密码：1ebz  
中的内容：

以上代码亲测可用，下载js，以及添加jar 前后端交互就可以了

[具体细节及思路][Link 1]

[https_pan.baidu.com_s_19n7uk9i8fvdrXCeN4iG9xA]: https://pan.baidu.com/s/19n7uk9i8fvdrXCeN4iG9xA
[Link 1]: https://www.cnblogs.com/yhtboke/p/5749126.html