191 lines
4.6 KiB
PHP
191 lines
4.6 KiB
PHP
<?php
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/*
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Copyright (c) CS-Digital UG (hatungsbeschränkt) https://cs-digital-ug.de/
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
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THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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echo "<!-- Copyright (c) CS-Digital UG (hatungsbeschränkt) https://cs-digital-ug.de/ -->";
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/*
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Identifier: sj3SjMAfJDRIK5YLWkcprM1gVYjgmZuUHK1bJ5Qa96m6ARkK5hMysb5ruC4oxXYjiWNcCuYvJ7mkSKRzMKNXdiFLeoY2Wn1jYTNAGqXoqBYyu1eFrvWm3Pj7y7soMwULKDxQYiKZTs43xPDiPmVjhM
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Date: 03.12.2020
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*/
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echo "<!-- Identifier: sj3SjMAfJDRIK5YLWkcprM1gVYjgmZuUHK1bJ5Qa96m6ARkK5hMysb5ruC4oxXYjiWNcCuYvJ7mkSKRzMKNXdiFLeoY2Wn1jYTNAGqXoqBYyu1eFrvWm3Pj7y7soMwULKDxQYiKZTs43xPDiPmVjhM -->";
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//Load options
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include_once("config.php");
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//check file exist
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if (file_exists($filename)) {
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$key = $_GET[$key_name];
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//open file and read it
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$myfile = fopen($filename, "r") or die("keyit.php: 1 Unable to open file!");
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$filekey =fread($myfile,filesize($filename));
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if($key == $filekey)
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{
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//Right key
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//Check if we need a new key (new key every 120 days)
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//check if it is more than x days
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$lastmodified= filemtime($filename);
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//whats now daytime
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$datetime = new DateTime();
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$datetime = $datetime->getTimestamp();
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/*** if file is 24 hours (86400 seconds) old then delete it ***/
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//8035200 sek ~3 monate
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//5356800 sek ~ 2 Monate
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//3456000 sek ~ 40 tage
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//2678400 sek ~ 1 Monat
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//1209600 sek ~ 14 Tage
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//864000 sek ~ 10 tage
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if( $lastmodified + ($option_newkeydays*(24*60*60)) < $datetime){
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//Its longer than x days, create new key
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//generate new key
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$newkey = createnewkeyfile($filename, $key_length );
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//Send mail to recipients
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$mail_subject ="Key changing: " . date("Y.m.d H:i:s");;
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$mail_message="The key of the file " . getCurrentUrl() . " has changed to: " . $newkey;
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sendmailtorecipients($email_ricipiants_contacts,$mail_subject,$mail_message,false);
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}else{
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//Key is not old enought to get changed
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}
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}else{
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//Wrong key
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header('HTTP/1.0 403 Forbidden');
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echo 'keyit.php: You are forbidden!';
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exit;
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die;
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}
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}else{
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//File does not exist
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//Create it with key
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$newkey = createnewkeyfile($filename,$key_length );
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//Send mail to recipients
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$mail_subject ="Key created: " . date("Y.m.d H:i:s");;
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$mail_message="The key of the file " . getCurrentUrl() . " has created: " . $newkey;
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sendmailtorecipients($email_ricipiants_contacts,$mail_subject,$mail_message,false);
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}
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//Secure file agains reading
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securekeyfileagainstreading($filename);
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//Funktionen / Functions
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//###########################################################
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function generateRandomString($length = 10) {
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$characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
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$charactersLength = strlen($characters);
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$randomString = '';
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for ($i = 0; $i < $length; $i++) {
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$randomString .= $characters[rand(0, $charactersLength - 1)];
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}
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return $randomString;
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}
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function writeinfile($filename,$text){
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$myfile = fopen($filename, "w") or die("keyit.php: 2 Unable to open file!");
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fwrite($myfile, $text);
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fclose($myfile);
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}
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function createnewkeyfile($filename, $key_length ){
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//create new key
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$newkey = generateRandomString($key_length);
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//create new file and safe it
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writeinfile($filename,$newkey);
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//secure key file
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securekeyfileagainstreading($filename);
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return $newkey;
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}
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function securekeyfileagainstreading($filename){
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chmod($filename, 0600);
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}
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function sendmailtorecipients($contacts_array,$subject,$message,$output=false){
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// $contacts array
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// $contacts = array("youremailaddress@yourdomain.com","youremailaddress@yourdomain.com");
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//....as many email address as you need
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foreach($contacts_array as $contact) {
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$to = $contact;
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mail($to, $subject, $message);
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//Outpu of sending message
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if($output == true){
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echo "keyit.php: Send mail to " . $to . "with the subject " . $subject . " and the text " . $message . "... <br>";
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}
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}
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}
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function getCurrentUrl() {
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return ((empty($_SERVER['HTTPS'])) ? 'http' : 'https') . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
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}
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?>
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