manage visitor IP behind reverse proxies, refs #36

[jirafeau_project.git] / lib / functions.php

diff --git a/lib/functions.php b/lib/functions.php
index 459587d01bacc3a11e40dc319e48c68378a39187..77acae1bd973f281586111e295bf096eef3234bd 100644 (file)
--- a/lib/functions.php
+++ b/lib/functions.php
@@ -2,7 +2,7 @@
 /*
  *  Jirafeau, your web file repository
  *  Copyright (C) 2008  Julien "axolotl" BERNARD <axolotl@magieeternelle.org>
- *  Copyright (C) 2012  Jerome Jutteau <j.jutteau@gmail.com>
+ *  Copyright (C) 2015  Jerome Jutteau <j.jutteau@gmail.com>
  *
  *  This program is free software: you can redistribute it and/or modify
  *  it under the terms of the GNU Affero General Public License as
@@ -98,6 +98,9 @@ function is_ssl() {
             return true;
     } elseif ( isset($_SERVER['SERVER_PORT']) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
         return true;
+    } elseif (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])) {
+        if ($_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https')
+            return true;
     }
     return false;
 }
@@ -345,7 +348,9 @@ jirafeau_upload ($file, $one_time_download, $key, $time, $ip, $crypt, $link_name
     /* Crypt file if option is enabled. */
     $crypted = false;
     $crypt_key = '';
-    if ($crypt == true && extension_loaded('mcrypt'))
+    if ($crypt == true && !(extension_loaded('mcrypt') == true))
+        error_log ("PHP extension mcrypt not loaded, won't encrypt in Jirafeau");
+    if ($crypt == true && extension_loaded('mcrypt') == true)
     {
         $crypt_key = jirafeau_encrypt_file ($file['tmp_name'], $file['tmp_name']);
         if (strlen($crypt_key) > 0)
@@ -441,7 +446,7 @@ jirafeau_upload ($file, $one_time_download, $key, $time, $ip, $crypt, $link_name
 }
 
 /**
- * tells if a mime-type is viewable in a browser
+ * Tells if a mime-type is viewable in a browser
  * @param $mime the mime type
  * @returns a boolean telling if a mime type is viewable
  */
@@ -451,7 +456,7 @@ jirafeau_is_viewable ($mime)
     if (!empty ($mime))
     {
         /* Actually, verify if mime-type is an image or a text. */
-        $viewable = array ('image', 'text');
+        $viewable = array ('image', 'text', 'video', 'audio');
         $decomposed = explode ('/', $mime);
         return in_array ($decomposed[0], $viewable);
     }
@@ -839,10 +844,11 @@ jirafeau_async_init ($filename, $type, $one_time, $key, $time, $ip)
   * @param $ref asynchronous upload reference
   * @param $file piece of data
   * @param $code client code for this operation
+  * @param $max_file_size maximum allowed file size
   * @return  a string containing a next code to use or the string "Error"
   */
 function
-jirafeau_async_push ($ref, $data, $code)
+jirafeau_async_push ($ref, $data, $code, $max_file_size)
 {
     /* Get async infos. */
     $a = jirafeau_get_async_ref ($ref);
@@ -856,9 +862,21 @@ jirafeau_async_push ($ref, $data, $code)
     
     $p = s2p ($ref);
 
+    /* File path. */
+    $r_path = $data['tmp_name'];
+    $w_path = VAR_ASYNC . $p . $ref . '_data';
+
+    /* Check that file size is not above upload limit. */
+    if ($max_file_size > 0 &&
+        filesize ($r_path) + filesize ($w_path) > $max_file_size * 1024 * 1024)
+    {
+        jirafeau_async_delete ($ref);
+        return "Error";
+    }
+
     /* Concatenate data. */
-    $r = fopen ($data['tmp_name'], 'r');
-    $w = fopen (VAR_ASYNC . $p . $ref . '_data', 'a');
+    $r = fopen ($r_path, 'r');
+    $w = fopen ($w_path, 'a');
     while (!feof ($r))
     {
         if (fwrite ($w, fread ($r, 1024)) === false)
@@ -871,7 +889,7 @@ jirafeau_async_push ($ref, $data, $code)
     }
     fclose ($r);
     fclose ($w);
-    unlink ($data['tmp_name']);
+    unlink ($r_path);
     
     /* Update async file. */
     $code = jirafeau_gen_random (4);
@@ -889,7 +907,7 @@ jirafeau_async_push ($ref, $data, $code)
   * @param $ref asynchronous upload reference
   * @param $code client code for this operation
   * @param $crypt boolean asking to crypt or not
-  * @param $link_name_length link name lenght
+  * @param $link_name_length link name length
   * @return  a string containing the download reference followed by a delete code or the string "Error"
   */
 function
@@ -908,7 +926,7 @@ jirafeau_async_end ($ref, $code, $crypt, $link_name_length)
 
     $crypted = false;
     $crypt_key = '';
-    if ($crypt == true && extension_loaded('mcrypt'))
+    if ($crypt == true && extension_loaded('mcrypt') == true)
     {
         $crypt_key = jirafeau_encrypt_file ($p, $p);
         if (strlen($crypt_key) > 0)
@@ -977,7 +995,7 @@ function
 jirafeau_encrypt_file ($fp_src, $fp_dst)
 {
     $fs = filesize ($fp_src);
-    if ($fs === false || $fs == 0 || !extension_loaded('mcrypt'))
+    if ($fs === false || $fs == 0 || !(extension_loaded('mcrypt') == true))
         return '';
 
     /* Prepare module. */
@@ -1016,7 +1034,7 @@ function
 jirafeau_decrypt_file ($fp_src, $fp_dst, $k)
 {
     $fs = filesize ($fp_src);
-    if ($fs === false || $fs == 0 || !extension_loaded('mcrypt'))
+    if ($fs === false || $fs == 0 || !(extension_loaded('mcrypt') == true))
         return false;
 
     /* Init module */
@@ -1063,7 +1081,56 @@ function jirafeau_challenge_upload_password ($cfg, $password)
     forEach ($cfg['upload_password'] as $p)
         if ($password == $p)
             return true;
-    error_log("password not found $password");
     return false;
 }
 
+/**
+ * Test if visitor's IP is authorized to upload.
+ * @param $ip IP to be challenged
+ * @return true if IP is authorized, false otherwise.
+ */
+function jirafeau_challenge_upload_ip ($cfg, $ip)
+{
+    if (count ($cfg['upload_ip']) == 0)
+        return true;
+    forEach ($cfg['upload_ip'] as $i)
+    {
+        if ($i == $ip)
+            return true;
+        // CIDR test for IPv4 only.
+        if (strpos ($i, '/') !== false)
+        {
+            list ($subnet, $mask) = explode('/', $i);
+            if ((ip2long ($ip) & ~((1 << (32 - $mask)) - 1) ) == ip2long ($subnet))
+                return true;
+        }
+    }
+    return false;
+}
+
+/**
+ * Get the ip address of the client from REMOTE_ADDR
+ * or from HTTP_X_FORWARDED_FOR if behind a proxy
+ * @returns an the client ip address
+ */
+function get_ip_address($cfg) {
+    if (count ($cfg['proxy_ip']) == 0 ||
+        empty ($_SERVER['HTTP_X_FORWARDED_FOR']))
+        return $_SERVER['REMOTE_ADDR'];
+
+    $iplist = explode (',', $_SERVER['HTTP_X_FORWARDED_FOR']);
+    if (count ($iplist) == 0)
+        return $_SERVER['REMOTE_ADDR'];
+
+    foreach ($cfg['proxy_ip'] as $proxy_ip)
+    {
+        if ($_SERVER['REMOTE_ADDR'] != $proxy_ip)
+            continue;
+
+        // Take the last IP (the one which has been set by our proxy).
+        $ip = end($iplist);
+        $ip = preg_replace ('/\s+/', '', $ip);
+        return $ip;
+    }
+    return $_SERVER['REMOTE_ADDR'];
+}