（转）博客园登陆__JSEncrypt 分析

Posted Hyaha

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下面就是从博客园登录页面copy下来的js登录代码片段

博客园登录时采用的ajax发信http登录请求，就是采用jsencypt加密，以保护用户登录账号安全，一下是js片段代码
 
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var return_url = \'http://home.cnblogs.com/u/wxb0328/\';
       var ajax_url = \'/user\' + \'/signin\';
       var enable_captcha = false;
       var is_in_progress = false;
 
       function setFocus() {
           document.getElementById(\'input1\').focus();
       }
 
       function check_enter(event) {
           if (event.keyCode == 13) {
               var target = event.target || event.srcElement;
               if (target.id == "input1") {
                   if (document.getElementById(\'input1\').value == \'\') {
                       $(\'#tip_input1\').html("请输入登录用户名");
                       return;
                   }
                   else if (document.getElementById(\'input2\').value == \'\') {
                       document.getElementById("input2").focus();
                       return;
                   }
               }
               if (target.id == "input2") {
                   if (document.getElementById(\'input2\').value == \'\') {
                       $(\'#tip_input2\').html("请输入密码");
                       return;
                   }
               }
               signin_go();
           }
       }
 
       function signin_go() {
           if(is_in_progress){
               return;
           }
 
           $(\'#tip_input1\').html(\'\');
           $(\'#tip_input2\').html(\'\');
 
           var input1 = $.trim($(\'#input1\').val());
           if (!input1) {
               $(\'#tip_input1\').html("请输入登录用户名");
               $(\'#input1\').focus();
               return;
           }
           var input2 = $.trim($(\'#input2\').val());
           if (!input2) {
               $(\'#tip_input2\').html("请输入密码");
               $(\'#input2\').focus();
               return;
           }
 
           if(enable_captcha)
           {
               var captchaCode = $.trim($(\'#captcha_code_input\').val());
               if (!captchaCode)
               {
                   $(\'#tip_captcha_code_input\').html("请输入验证码");
                   $(\'#captcha_code_input\').focus();
                   return;
               }
           }
 
           $(\'#tip_btn\').html(\'提交中...\');
 
           var encrypt = new JSEncrypt();
           encrypt.setPublicKey(\'MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCp0wHYbg/NOPO3nzMD3dndwS0MccuMeXCHgVlGOoYyFwLdS24Im2e7YyhB0wrUsyYf0/nhzCzBK8ZC9eCWqd0aHbdgOQT6CuFQBMjbyGYvlVYU2ZP7kG9Ft6YV6oc9ambuO7nPZh+bvXH0zDKfi02prknrScAKC0XhadTHT3Al0QIDAQAB\');
           var encrypted_input1 = encrypt.encrypt($(\'#input1\').val());
           var encrypted_input2 = encrypt.encrypt($(\'#input2\').val());
           var ajax_data = {
               input1: encrypted_input1,
               input2: encrypted_input2,
               remember: $(\'#remember_me\').prop(\'checked\')
           };
 
           if(enable_captcha){
               var captchaObj = $("#captcha_code_input").get(0).Captcha;
               ajax_data.captchaId = captchaObj.Id;
               ajax_data.captchaInstanceId = captchaObj.InstanceId;
               ajax_data.captchaUserInput = $("#captcha_code_input").val();
           }
           is_in_progress = true;
           $.ajax({
               url: ajax_url,
               type: \'post\',
               data: JSON.stringify(ajax_data),
               contentType: \'application/json; charset=utf-8\',
               dataType: \'json\',
               headers: {
                   \'VerificationToken\': \'v8o6Zbt1bkghAprMyn-NuKazyejPBAjz21CtWG81iKijaJ5u4u37q22GSdkbB9aqIc9deUoBETwjJxGFh0jLPZTSnXc1:EnF2TIFu9G2Kd0NgQuSFsXzcWtXcEj7AdxylV6Rlt7k5rcmZOu3j9bcoPO1kiBKGjg1V0WFB9dj8rWXIW34di1ONV6c1\'
               },
               success: function (data) {                   
                   if (data.success) {
                       $(\'#tip_btn\').html(\'登录成功，正在重定向...\');
                       location.href = return_url;
                   } else {
                       $(\'#tip_btn\').html(data.message + "<br/><br/>联系 contact@cnblogs.com");
                       is_in_progress = false;
                       if(enable_captcha)
                       {
                           captchaObj.ReloadImage();
                       }
                   }
               },
               error: function (xhr) {
                   is_in_progress = false;
                   $(\'#tip_btn\').html(\'抱歉！出错！联系 contact@cnblogs.com\');
               }
           });
       }
 
       $(function () {
           $(\'#signin\').bind(\'click\', function () {
               signin_go();
           }).val(\'登 录\');
 
       });
可以看到博客园使用了一个js加密类库：jsencrypt，下面就来了解一下这个类库！
 
js的一个使用OpenSSL加密，解密，秘钥生成类库      
A javascript library to perform OpenSSL RSA Encryption, Decryption, and Key Generation
这里不对jsencrypt这个js类库做详细的介绍了，大家有兴趣可以去它的github主页学习，其实这个类库还是相对比较简单的，只要稍微看看就应该可以掌握。
 
[github主页](https://github.com/travist/jsencrypt  )    
[官方网站](http://travistidwell.com/jsencrypt/  )    
 
PHP关于OpenSSL相关资料
 
 
关于后台PHP解密  
 
1. 学习PHP手册：[PHP手册OpenSSL](http://php.net/manual/zh/book.openssl.php  )  
2. 参考博客：[php rsa加密解密实例](http://blog.csdn.net/clh604/article/details/20224735  )   
 
下面贴出我自己写的测试demo
test.html
 
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<!doctype html>
<html>
  <head>
    <title>JavaScript RSA Encryption</title>
    <script src="http://code.jquery.com/jquery-1.8.3.min.js"></script>
    <script src="./jsencrypt.min.js"></script>
    <script type="text/javascript">
// 使用jsencrypt类库加密js方法，
function encryptRequest(reqUrl, data, publicKey){
    var encrypt = new JSEncrypt();
    encrypt.setPublicKey(publicKey);
    // ajax请求发送的数据对象
    var sendData = new Object();
    // 将data数组赋给ajax对象
    for(var key in data){
        sendData[key] = encrypt.encrypt(data[key]);
    }
 
      $.ajax({
            url: reqUrl,
            type: \'post\',
            data: sendData,
            dataType: \'json\',
            success: function (data) {                   
                console.info(data);
            },
            error: function (xhr) {
                console.error(\'出错了\');
            }
        });
 
}
 
      // Call this code when the page is done loading.
      $(function() {
 
        $(\'#testme\').click(function() {
             
            var data = [];
            data[\'username\']= $(\'#username\').val();
            data[\'passwd\']= $(\'#passwd\').val();
 
            var pkey = $(\'#pubkey\').val();
            encryptRequest(\'./test.php\', data, pkey);
        });
      });
    </script>
  </head>
  <body>
    <label for="pubkey">Public Key</label><br/>
    <textarea id="pubkey" rows="15" cols="65">-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCBWNoG5LJ3u44Gs8PWs1MaNUQQ
+mOmh+9zWdzSt3ORbmfCDvU+ssW/6QTTgXvWWx7+Wzq/a4fCCQp72zSqXeVhWkTV
ct9Hyp/iMo5K6qOEK76z9z+tP/u99X6qazeXGVMWKkPiyZT4mKAGd/U8Mph9Z1Z5
kOluA7g7heq8PPlE9wIDAQAB
-----END PUBLIC KEY-----</textarea><br/>
    <label for="input">Text to encrypt:</label><br/>
    name:<input id="username" name="username" type="text"></input><br/>
    password:<input id="passwd" name="passwd" type="password"></input><br/>
    <input id="testme" type="button" value="submit" /><br/>
  </body>
</html>
 
test.php
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<?php
     
// 接收客户端发送过来的经过加密的登录信息
$input = $_POST;
// 私钥是放在服务器端的，用以验证和解密客户端经过公钥加密后的信息
$private_key = \'-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----\';
 
// 公钥一般存放在登录页面中的一个隐藏域中，但是请注意：公钥和私钥一定要配对，且必须保证私钥的安全
$public_key = \'-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCBWNoG5LJ3u44Gs8PWs1MaNUQQ
+mOmh+9zWdzSt3ORbmfCDvU+ssW/6QTTgXvWWx7+Wzq/a4fCCQp72zSqXeVhWkTV
ct9Hyp/iMo5K6qOEK76z9z+tP/u99X6qazeXGVMWKkPiyZT4mKAGd/U8Mph9Z1Z5
kOluA7g7heq8PPlE9wIDAQAB
-----END PUBLIC KEY-----\';
 
/**
 * 使用PHP OpenSSL时，最好先看看手册，了解如何开启OpenSSL 和 其中的一些方法的使用
 *  具体如何使用这里不做赘述，大家去看看PHP手册，什么都就解决了
 */
$pi_key =  openssl_pkey_get_private($private_key);//这个函数可用来判断私钥是否是可用的，可用返回资源id Resource id 
$pu_key = openssl_pkey_get_public($public_key);//这个函数可用来判断公钥是否是可用的 
 
$decrypted = ""; 
openssl_private_decrypt(base64_decode($input[\'username\']),$decrypted,$pi_key);//私钥解密 
// 这里的这个 $decrypted就是解密客户端发送过来的用户名，至于后续连接数据库验证登录信息的代码，这里也就省略了
echo json_encode($decrypted);

效果

 
 
总结
 
使用OpenSSL的方式加密可以达到比较安全的级别，在平时项目中非常有用！在以后工作中可以多多学习、使用、积累经验。
 
转自：http://www.cnblogs.com/wxb0328/p/4641820.html?utm_source=tuicool&utm_medium=referral

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