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+<?php

+/**

+ *  Copyright (C) 2022, 2024  Double Bastion LLC

+ *

+ *  This file is part of Roundpin, which is licensed under the

+ *  GNU Affero General Public License Version 3.0. The license terms

+ *  are detailed in the "LICENSE.txt" file located in the root directory.

+ */

+

+session_start();

+

+if (isset($_GET['sipusername']) && $_GET['sipusername'] != '' && isset($_GET['encextenpass']) && $_GET['encextenpass'] != '' && isset($_GET['conferenceext']) && 

+    $_GET['conferenceext'] != '' && isset($_GET['destSipUser']) && $_GET['destSipUser'] != '' && isset($_GET['sentFlNm']) && $_GET['sentFlNm'] != '') {

+

+    define('ACCESSCONST', TRUE);

+

+    require('db-connect.php');

+

+    $vconfExtension = $_GET['sipusername'];

+    $extenPassEnc = rawurldecode($_GET['encextenpass']);

+    $videoConfExt = $_GET['conferenceext'];

+

+    $destSipUser = $_GET['destSipUser'];

+    $sentFileName = $_GET['sentFlNm'];

+

+    $fileToDownload = '../textchat/' . $destSipUser . '/uploads/' . $sentFileName;

+

+    // Check if the received external user extension, the corresponding encrypted password and the extension of the conference, match the data in the 'external_users' table

+    $query = $mysqli->prepare("SELECT id, exten_for_external, exten_for_ext_pass, conf_extension FROM external_users WHERE exten_for_external = ? AND exten_for_ext_pass = ? AND conf_extension = ?");

+    $query->bind_param("sss", $vconfExtension, $extenPassEnc, $videoConfExt);

+    $query->execute();

+    $extqueryres = $query->get_result()->fetch_array();

+

+    if (!$extqueryres) {

+

+        http_response_code(400);

+        exit();

+

+    } else {

+

+	    // Process the download

+	    if (is_file($fileToDownload)) {

+		    header('Content-Description: File Transfer');

+		    header('Content-Type: application/octet-stream');

+		    header('Content-Disposition: attachment; filename="' . basename($fileToDownload) . '"');

+		    header('Expires: 0');

+		    header('Cache-Control: no-cache, must-revalidate');

+		    header('Pragma: public');

+		    header('Content-Length: ' . filesize($fileToDownload));

+		    flush();

+		    readfile($fileToDownload);

+		    exit();

+	    } else {

+		    http_response_code(404);

+		    exit();

+	    }

+

+    }

+

+} else {

+        header("Location: ../login.php");

+}

+

+?>