Fixes #21 repair file downloading in admin interface

[jirafeau.git] / lib / functions.php

diff --git a/lib/functions.php b/lib/functions.php
old mode 100755 (executable)
new mode 100644 (file)
index 87d2cff..b98486f
--- 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>
 /*
  *  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
  *
  *  This program is free software: you can redistribute it and/or modify
  *  it under the terms of the GNU Affero General Public License as


@@ -90,6 +90,18 @@ jirafeau_gen_random ($l)
     return $code;
 }
 
     return $code;
 }
 

+function is_ssl() {
+    if ( isset($_SERVER['HTTPS']) ) {
+        if ( 'on' == strtolower($_SERVER['HTTPS']) )
+            return true;
+        if ( '1' == $_SERVER['HTTPS'] )
+            return true;
+    } elseif ( isset($_SERVER['SERVER_PORT']) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
+        return true;
+    }
+    return false;
+}
+

 function
 jirafeau_human_size ($octets)
 {
 function
 jirafeau_human_size ($octets)
 {


@@ -122,10 +134,11 @@ function
 jirafeau_clean_rm_file ($md5)
 {
     $p = s2p ("$md5");
 jirafeau_clean_rm_file ($md5)
 {
     $p = s2p ("$md5");

-    if (file_exists (VAR_FILES . $p . $md5))
-        unlink (VAR_FILES . $p . $md5);
-    if (file_exists (VAR_FILES . $p . $md5 . '_count'))
-        unlink (VAR_FILES . $p . $md5 . '_count');
+    $f = VAR_FILES . $p . $md5;
+    if (file_exists ($f) && is_file ($f))
+        unlink ($f);
+    if (file_exists ($f . '_count') && is_file ($f . '_count'))
+        unlink ($f . '_count');

     $parse = VAR_FILES . $p;
     $scan = array();
     while (file_exists ($parse)
     $parse = VAR_FILES . $p;
     $scan = array();
     while (file_exists ($parse)


@@ -306,13 +319,15 @@ jirafeau_delete_file ($md5)
  * @param $key if not empty, protect the file with this key
  * @param $time the time of validity of the file
  * @param $ip uploader's ip
  * @param $key if not empty, protect the file with this key
  * @param $time the time of validity of the file
  * @param $ip uploader's ip

+ * @param $crypt boolean asking to crypt or not
+ * @param $link_name_length size of the link name

  * @returns an array containing some information
  *   'error' => information on possible errors
  *   'link' => the link name of the uploaded file
  *   'delete_link' => the link code to delete file
  */
 function
  * @returns an array containing some information
  *   'error' => information on possible errors
  *   'link' => the link name of the uploaded file
  *   'delete_link' => the link code to delete file
  */
 function

-jirafeau_upload ($file, $one_time_download, $key, $time, $ip)
+jirafeau_upload ($file, $one_time_download, $key, $time, $ip, $crypt, $link_name_length)

 {
     if (empty ($file['tmp_name']) || !is_uploaded_file ($file['tmp_name']))
     {
 {
     if (empty ($file['tmp_name']) || !is_uploaded_file ($file['tmp_name']))
     {


@@ -327,6 +342,18 @@ jirafeau_upload ($file, $one_time_download, $key, $time, $ip)
     /* array representing no error */
     $noerr = array ('has_error' => false, 'why' => '');
 
     /* array representing no error */
     $noerr = array ('has_error' => false, 'why' => '');
 

+    /* Crypt file if option is enabled. */
+    $crypted = false;
+    $crypt_key = '';
+    if ($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)
+            $crypted = true;
+    }
+

     /* file informations */
     $md5 = md5_file ($file['tmp_name']);
     $name = str_replace (NL, '', trim ($file['name']));
     /* file informations */
     $md5 = md5_file ($file['tmp_name']);
     $name = str_replace (NL, '', trim ($file['name']));


@@ -368,22 +395,22 @@ jirafeau_upload ($file, $one_time_download, $key, $time, $ip)
     fclose ($handle);
 
     /* Create delete code. */
     fclose ($handle);
 
     /* Create delete code. */

-    $delete_link_code = jirafeau_gen_random (8);
+    $delete_link_code = jirafeau_gen_random (5);

 
 

-    /* md5 password or empty */
+    /* md5 password or empty. */

     $password = '';
     if (!empty ($key))
         $password = md5 ($key);
 
     /* create link file */
     $password = '';
     if (!empty ($key))
         $password = md5 ($key);
 
     /* create link file */

-    $link_tmp_name =  VAR_LINKS . $md5 . rand (0, 10000) . ' .tmp';
+    $link_tmp_name =  VAR_LINKS . $md5 . rand (0, 10000) . '.tmp';

     $handle = fopen ($link_tmp_name, 'w');
     fwrite ($handle,
             $name . NL. $mime_type . NL. $size . NL. $password . NL. $time .
             NL . $md5. NL . ($one_time_download ? 'O' : 'R') . NL . date ('U') .
     $handle = fopen ($link_tmp_name, 'w');
     fwrite ($handle,
             $name . NL. $mime_type . NL. $size . NL. $password . NL. $time .
             NL . $md5. NL . ($one_time_download ? 'O' : 'R') . NL . date ('U') .

-            NL . $ip . NL. $delete_link_code . NL);
+            NL . $ip . NL. $delete_link_code . NL . ($crypted ? 'C' : 'O'));

     fclose ($handle);
     fclose ($handle);

-    $md5_link = base_16_to_64 (md5_file ($link_tmp_name));
+    $md5_link = substr(base_16_to_64 (md5_file ($link_tmp_name)), 0, $link_name_length);

     $l = s2p ("$md5_link");
     if (!@mkdir (VAR_LINKS . $l, 0755, true) ||
         !rename ($link_tmp_name,  VAR_LINKS . $l . $md5_link))
     $l = s2p ("$md5_link");
     if (!@mkdir (VAR_LINKS . $l, 0755, true) ||
         !rename ($link_tmp_name,  VAR_LINKS . $l . $md5_link))


@@ -411,7 +438,8 @@ jirafeau_upload ($file, $one_time_download, $key, $time, $ip)
     }
    return (array ('error' => $noerr,
                   'link' => $md5_link,
     }
    return (array ('error' => $noerr,
                   'link' => $md5_link,

-                  'delete_link' => $delete_link_code));
+                  'delete_link' => $delete_link_code,
+                  'crypt_key' => $crypt_key));

 }
 
 /**
 }
 
 /**


@@ -425,7 +453,7 @@ jirafeau_is_viewable ($mime)
     if (!empty ($mime))
     {
         /* Actually, verify if mime-type is an image or a text. */
     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);
     }
         $decomposed = explode ('/', $mime);
         return in_array ($decomposed[0], $viewable);
     }


@@ -477,10 +505,10 @@ show_errors ()
     }
 }
 
     }
 }
 

-function check_errors ()
+function check_errors ($cfg)

 {
     if (file_exists (JIRAFEAU_ROOT . 'install.php')
 {
     if (file_exists (JIRAFEAU_ROOT . 'install.php')

-        && !file_exists (JIRAFEAU_ROOT . 'lib/config.local.php'))
+        && !($cfg['installation_done'] === true))

     {
         header('Location: install.php'); 
         exit;
     {
         header('Location: install.php'); 
         exit;


@@ -498,12 +526,6 @@ function check_errors ()
     
     if (!is_writable (VAR_ASYNC))
         add_error (t('The async directory is not writable!'), VAR_ASYNC);
     
     if (!is_writable (VAR_ASYNC))
         add_error (t('The async directory is not writable!'), VAR_ASYNC);

-
-    /* Check if the install.php script is still in the directory. */
-    if (file_exists (JIRAFEAU_ROOT . 'install.php'))
-        add_error (t('Installer script still present'),
-             t('Please make sure to delete the installer script ' .
-               '"install.php" before continuing.'));

 }
 
 /**
 }
 
 /**


@@ -530,6 +552,10 @@ jirafeau_get_link ($hash)
     $out['upload_date'] = trim ($c[7]);
     $out['ip'] = trim ($c[8]);
     $out['link_code'] = trim ($c[9]);
     $out['upload_date'] = trim ($c[7]);
     $out['ip'] = trim ($c[8]);
     $out['link_code'] = trim ($c[9]);

+    if (trim ($c[10]) == 'C')
+           $out['crypted'] = true;
+    else
+           $out['crypted'] = false;

     
     return $out;
 }
     
     return $out;
 }


@@ -815,10 +841,11 @@ 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 $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
   * @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);
 {
     /* Get async infos. */
     $a = jirafeau_get_async_ref ($ref);


@@ -832,9 +859,21 @@ jirafeau_async_push ($ref, $data, $code)
     
     $p = s2p ($ref);
 
     
     $p = s2p ($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. */
     /* 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 ($r, 1024)) === false)
     while (!feof ($r))
     {
         if (fwrite ($w, fread ($r, 1024)) === false)


@@ -847,7 +886,7 @@ jirafeau_async_push ($ref, $data, $code)
     }
     fclose ($r);
     fclose ($w);
     }
     fclose ($r);
     fclose ($w);

-    unlink ($data['tmp_name']);
+    unlink ($r_path);

     
     /* Update async file. */
     $code = jirafeau_gen_random (4);
     
     /* Update async file. */
     $code = jirafeau_gen_random (4);


@@ -864,10 +903,12 @@ jirafeau_async_push ($ref, $data, $code)
   * Finalyze an asynchronous upload.
   * @param $ref asynchronous upload reference
   * @param $code client code for this operation
   * Finalyze an asynchronous upload.
   * @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

   * @return  a string containing the download reference followed by a delete code or the string "Error"
   */
 function
   * @return  a string containing the download reference followed by a delete code or the string "Error"
   */
 function

-jirafeau_async_end ($ref, $code)
+jirafeau_async_end ($ref, $code, $crypt, $link_name_length)

 {
     /* Get async infos. */
     $a = jirafeau_get_async_ref ($ref);
 {
     /* Get async infos. */
     $a = jirafeau_get_async_ref ($ref);


@@ -879,10 +920,20 @@ jirafeau_async_end ($ref, $code)
     $p = VAR_ASYNC . s2p ($ref) . $ref . "_data";
     if (!file_exists($p))
         return "Error";
     $p = VAR_ASYNC . s2p ($ref) . $ref . "_data";
     if (!file_exists($p))
         return "Error";

+
+    $crypted = false;
+    $crypt_key = '';
+    if ($crypt == true && extension_loaded('mcrypt') == true)
+    {
+        $crypt_key = jirafeau_encrypt_file ($p, $p);
+        if (strlen($crypt_key) > 0)
+            $crypted = true;
+    }
+

     $md5 = md5_file ($p);
     $size = filesize($p);
     $np = s2p ($md5);
     $md5 = md5_file ($p);
     $size = filesize($p);
     $np = s2p ($md5);

-    $delete_link_code = jirafeau_gen_random (8);
+    $delete_link_code = jirafeau_gen_random (5);

     
     /* File already exist ? */ 
     if (!file_exists (VAR_FILES . $np))
     
     /* File already exist ? */ 
     if (!file_exists (VAR_FILES . $np))


@@ -903,14 +954,14 @@ jirafeau_async_end ($ref, $code)
     fclose ($handle);
     
     /* Create link. */
     fclose ($handle);
     
     /* Create link. */

-    $link_tmp_name =  VAR_LINKS . $md5 . rand (0, 10000) . ' .tmp';
+    $link_tmp_name =  VAR_LINKS . $md5 . rand (0, 10000) . '.tmp';

     $handle = fopen ($link_tmp_name, 'w');
     fwrite ($handle,
             $a['file_name'] . NL . $a['mime_type'] . NL . $size . NL .
             $a['key'] . NL . $a['time'] . NL . $md5 . NL . $a['onetime'] . NL .
     $handle = fopen ($link_tmp_name, 'w');
     fwrite ($handle,
             $a['file_name'] . NL . $a['mime_type'] . NL . $size . NL .
             $a['key'] . NL . $a['time'] . NL . $md5 . NL . $a['onetime'] . NL .

-            date ('U') . NL . $a['ip'] . NL . $delete_link_code . NL);
+            date ('U') . NL . $a['ip'] . NL . $delete_link_code . NL . ($crypted ? 'C' : 'O'));

     fclose ($handle);
     fclose ($handle);

-    $md5_link = base_16_to_64 (md5_file ($link_tmp_name));
+    $md5_link = substr(base_16_to_64 (md5_file ($link_tmp_name)), 0, $link_name_length);

     $l = s2p ("$md5_link");
     if (!@mkdir (VAR_LINKS . $l, 0755, true) ||
         !rename ($link_tmp_name,  VAR_LINKS . $l . $md5_link))
     $l = s2p ("$md5_link");
     if (!@mkdir (VAR_LINKS . $l, 0755, true) ||
         !rename ($link_tmp_name,  VAR_LINKS . $l . $md5_link))


@@ -918,6 +969,115 @@ jirafeau_async_end ($ref, $code)
     
     /* Clean async upload. */
     jirafeau_async_delete ($ref);
     
     /* Clean async upload. */
     jirafeau_async_delete ($ref);

-    return $md5_link . NL . $delete_link_code;
+    return $md5_link . NL . $delete_link_code . NL . urlencode($crypt_key);
+}
+
+function
+jirafeau_crypt_create_iv($base, $size)
+{
+    $iv = '';
+    while (strlen ($iv) < $size)
+        $iv = $iv . $base;
+    $iv = substr($iv, 0, $size);
+    return $iv;

 }
 }

-?>
+
+/**
+ * Crypt file and returns decrypt key.
+ * @param $fp_src file path to the file to crypt.
+ * @param $fp_dst file path to the file to write crypted file (could be the same).
+ * @return decrypt key composed of the key and the iv separated by a point ('.')
+ */
+function
+jirafeau_encrypt_file ($fp_src, $fp_dst)
+{
+    $fs = filesize ($fp_src);
+    if ($fs === false || $fs == 0 || !(extension_loaded('mcrypt') == true))
+        return '';
+
+    /* Prepare module. */
+    $m = mcrypt_module_open('rijndael-256', '', 'ofb', '');
+    /* Generate key. */
+    $crypt_key = jirafeau_gen_random (10);
+    $md5_key = md5($crypt_key);
+    $iv = jirafeau_crypt_create_iv ($md5_key, mcrypt_enc_get_iv_size($m));
+    /* Init module. */
+    mcrypt_generic_init($m, $md5_key, $iv);
+    /* Crypt file. */
+    $r = fopen ($fp_src, 'r');
+    $w = fopen ($fp_dst, 'c');
+    while (!feof ($r))
+    {
+        $enc = mcrypt_generic($m, fread ($r, 1024));
+        if (fwrite ($w, $enc) === false)
+            return '';
+    }
+    fclose ($r);
+    fclose ($w);
+    /* Cleanup. */
+    mcrypt_generic_deinit($m);
+    mcrypt_module_close($m);
+    return $crypt_key;
+}
+
+/**
+ * Decrypt file.
+ * @param $fp_src file path to the file to decrypt.
+ * @param $fp_dst file path to the file to write decrypted file (could be the same).
+ * @param $k string composed of the key and the iv separated by a point ('.')
+ * @return key used to decrypt. a string of length 0 is returned if failed.
+ */
+function
+jirafeau_decrypt_file ($fp_src, $fp_dst, $k)
+{
+    $fs = filesize ($fp_src);
+    if ($fs === false || $fs == 0 || !(extension_loaded('mcrypt') == true))
+        return false;
+
+    /* Init module */
+    $m = mcrypt_module_open('rijndael-256', '', 'ofb', '');
+    /* Extract key and iv. */
+    $crypt_key = $k;
+    $md5_key = md5($crypt_key);
+    $iv = jirafeau_crypt_create_iv ($md5_key, mcrypt_enc_get_iv_size($m));
+    /* Decrypt file. */
+    $r = fopen ($fp_src, 'r');
+    $w = fopen ($fp_dst, 'c');
+    while (!feof ($r))
+    {
+        $dec = mdecrypt_generic($m, fread ($r, 1024));
+        if (fwrite ($w, $dec) === false)
+            return false;
+    }
+    fclose ($r);
+    fclose ($w);
+    /* Cleanup. */
+    mcrypt_generic_deinit($m);
+    mcrypt_module_close($m);
+    return true;
+}
+
+/**
+ * Check if Jirafeau is password protected for visitors.
+ * @return true if Jirafeau is password protected, false otherwise.
+ */
+function jirafeau_has_upload_password ($cfg)
+{
+    return count ($cfg['upload_password']) > 0;
+}
+
+/**
+ * Challenge password for a visitor.
+ * @param $password password to be challenged
+ * @return true if password is valid, false otherwise.
+ */
+function jirafeau_challenge_upload_password ($cfg, $password)
+{
+    if (!jirafeau_has_upload_password($cfg))
+        return false;
+    forEach ($cfg['upload_password'] as $p)
+        if ($password == $p)
+            return true;
+    return false;
+}
+