X-Git-Url: https://git.p6c8.net/jirafeau_project.git/blobdiff_plain/1fe28b19ecaaeedfb9b5087f6d8c742968934ddb..9129b76daf97b1ac4dedfbeca28ba625dca83ef8:/lib/functions.php?ds=inline

diff --git a/lib/functions.php b/lib/functions.php
index d4a5e6a..592e841 100644
--- a/lib/functions.php
+++ b/lib/functions.php
@@ -2,7 +2,8 @@
 /*
  *  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>
+ *  Copyright (C) 2015  Nicola Spanti (RyDroid) <dev@nicola-spanti.info>
  *
  *  This program is free software: you can redistribute it and/or modify
  *  it under the terms of the GNU Affero General Public License as
@@ -15,14 +16,152 @@
  *  GNU Affero General Public License for more details.
  *
  *  You should have received a copy of the GNU Affero General Public License
- *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
+
+/**
+ * Transform a string in a path by seperating each letters by a '/'.
+ * @return path finishing with a '/'
+ */
+function
+s2p ($s)
+{
+    $p = '';
+    for ($i = 0; $i < strlen ($s); $i++)
+        $p .= $s{$i} . '/';
+    return $p;
+}
+
+/**
+ * Convert base 16 to base 64
+ * @returns A string based on 64 characters (0-9, a-z, A-Z, "-" and "_")
+ */
+function
+base_16_to_64 ($num)
+{
+    $m = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_';
+    $hex2bin = array ('0000',  # 0
+                      '0001',  # 1
+                      '0010',  # 2
+                      '0011',  # 3
+                      '0100',  # 4
+                      '0101',  # 5
+                      '0110',  # 6
+                      '0111',  # 7
+                      '1000',  # 8
+                      '1001',  # 9
+                      '1010',  # a
+                      '1011',  # b
+                      '1100',  # c
+                      '1101',  # d
+                      '1110',  # e
+                      '1111'); # f
+    $o = '';    
+    $b = '';
+    $i = 0;
+    # Convert long hex string to bin.
+    $size = strlen ($num);
+    for ($i = 0; $i < $size; $i++)
+        $b .= $hex2bin{hexdec ($num{$i})};
+    # Convert long bin to base 64.
+    $size *= 4;
+    for ($i = $size - 6; $i >= 0; $i -= 6)
+        $o = $m{bindec (substr ($b, $i, 6))} . $o;
+    # Some few bits remaining ?
+    if ($i < 0 && $i > -6)
+        $o = $m{bindec (substr ($b, 0, $i + 6))} . $o;
+    return $o;
+}
+
+/**
+  * Generate a random code.
+  * @param $l code length
+  * @return  random code.
+  */
+function
+jirafeau_gen_random ($l)
+{
+    if ($l <= 0)
+        return 42;
+
+    $code="";
+    for ($i = 0; $i < $l; $i++)
+        $code .= dechex (rand (0, 15));
+
+    return $code;
+}
+
+function
+is_ssl() {
+    if ( isset($_SERVER['HTTPS']) ) {
+        if ( 'on' == strtolower($_SERVER['HTTPS']) ||
+             '1' == $_SERVER['HTTPS'] )
+            return true;
+    } elseif ( isset($_SERVER['SERVER_PORT']) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
+        return true;
+    } elseif (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])) {
+        if ($_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https')
+            return true;
+    }
+    return false;
+}
+
+function
+jirafeau_human_size ($octets)
+{
+    $u = array ('B', 'KB', 'MB', 'GB', 'TB');
+    $o = max ($octets, 0);
+    $p = min (floor (($o ? log ($o) : 0) / log (1024)), count ($u) - 1);
+    $o /= pow (1024, $p);
+    return round ($o, 1) . $u[$p];
+} 
+
+function
+jirafeau_clean_rm_link ($link)
+{
+    $p = s2p ("$link");
+    if (file_exists (VAR_LINKS . $p . $link))
+        unlink (VAR_LINKS . $p . $link);
+    $parse = VAR_LINKS . $p;
+    $scan = array();
+    while (file_exists ($parse)
+           && ($scan = scandir ($parse))
+           && count ($scan) == 2 // '.' and '..' folders => empty.
+           && basename ($parse) != basename (VAR_LINKS)) 
+    {
+        rmdir ($parse);
+        $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
+    }
+}
+
+function
+jirafeau_clean_rm_file ($md5)
+{
+    $p = s2p ("$md5");
+    $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)
+           && ($scan = scandir ($parse))
+           && count ($scan) == 2 // '.' and '..' folders => empty.
+           && basename ($parse) != basename (VAR_FILES)) 
+    {
+        rmdir ($parse);
+        $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
+    }
+}
+
 /**
  * transforms a php.ini string representing a value in an integer
  * @param $value the value from php.ini
  * @returns an integer for this value
  */
-function jirafeau_ini_to_bytes ($value)
+function
+jirafeau_ini_to_bytes ($value)
 {
     $modifier = substr ($value, -1);
     $bytes = substr ($value, 0, -1);
@@ -38,23 +177,33 @@ function jirafeau_ini_to_bytes ($value)
         $bytes *= 1024;
     case 'K':
         $bytes *= 1024;
-    default:
-        break;
     }
     return $bytes;
 }
 
 /**
  * gets the maximum upload size according to php.ini
- * @returns the maximum upload size
+ * @returns the maximum upload size in bytes
  */
 function
-jirafeau_get_max_upload_size ()
+jirafeau_get_max_upload_size_bytes ()
 {
     return min (jirafeau_ini_to_bytes (ini_get ('post_max_size')),
                 jirafeau_ini_to_bytes (ini_get ('upload_max_filesize')));
 }
 
+/**
+ * gets the maximum upload size according to php.ini
+ * @returns the maximum upload size string
+ */
+function
+jirafeau_get_max_upload_size ()
+{
+    return jirafeau_human_size(
+            min (jirafeau_ini_to_bytes (ini_get ('post_max_size')),
+                 jirafeau_ini_to_bytes (ini_get ('upload_max_filesize'))));
+}
+
 /**
  * gets a string explaining the error
  * @param $code the error code
@@ -67,26 +216,19 @@ jirafeau_upload_errstr ($code)
     {
     case UPLOAD_ERR_INI_SIZE:
     case UPLOAD_ERR_FORM_SIZE:
-        return _('Your file exceeds the maximum authorized file size. ');
-        break;
+        return t('Your file exceeds the maximum authorized file size. ');
 
     case UPLOAD_ERR_PARTIAL:
     case UPLOAD_ERR_NO_FILE:
         return
-            _
-            ('Your file was not uploaded correctly. You may succeed in retrying. ');
-        break;
+            t('Your file was not uploaded correctly. You may succeed in retrying. ');
 
     case UPLOAD_ERR_NO_TMP_DIR:
     case UPLOAD_ERR_CANT_WRITE:
     case UPLOAD_ERR_EXTENSION:
-        return _('Internal error. You may not succeed in retrying. ');
-        break;
-
-    default:
-        break;
+        return t('Internal error. You may not succeed in retrying. ');
     }
-    return _('Unknown error. ');
+    return t('Unknown error. ');
 }
 
 /** Remove link and it's file
@@ -94,37 +236,34 @@ jirafeau_upload_errstr ($code)
  */
 
 function
-jirafeau_delete ($link)
+jirafeau_delete_link ($link)
 {
-    if (!file_exists ( VAR_LINKS . $link))
+    $l = jirafeau_get_link ($link);
+    if (!count ($l))
         return;
 
-    $content = file (VAR_LINKS . $link);
-    $md5 = trim ($content[5]);
-    unlink (VAR_LINKS . $link);
+    jirafeau_clean_rm_link ($link);
+
+    $md5 = $l['md5'];
+    $p = s2p ("$md5");
 
     $counter = 1;
-    if (file_exists ( VAR_FILES . $md5. '_count'))
+    if (file_exists (VAR_FILES . $p . $md5. '_count'))
     {
-        $content = file ( VAR_FILES . $md5. '_count');
+        $content = file (VAR_FILES . $p . $md5. '_count');
         $counter = trim ($content[0]);
     }
     $counter--;
 
     if ($counter >= 1)
     {
-        $handle = fopen ( VAR_FILES . $md5. '_count', 'w');
+        $handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
         fwrite ($handle, $counter);
         fclose ($handle);
     }
 
     if ($counter == 0)
-    {
-        if (file_exists (VAR_FILES . $md5))
-            unlink ( VAR_FILES . $md5);
-        if (file_exists (VAR_FILES . $md5 . '_count'))
-        unlink ( VAR_FILES . $md5. '_count');
-    }
+        jirafeau_clean_rm_file ($md5);
 }
 
 /**
@@ -134,27 +273,38 @@ function
 jirafeau_delete_file ($md5)
 {
     $count = 0;
-    $links_dir = scandir (VAR_LINKS);
-    
-    foreach ($links_dir as $link)
+    /* Get all links files. */
+    $stack = array (VAR_LINKS);
+    while (($d = array_shift ($stack)) && $d != NULL)
     {
-        if (strcmp ($link, '.') == 0 || strcmp ($link, '..') == 0 ||
-            preg_match ('/\.tmp/i', "$link"))
-            continue;
-        /* Read link informations. */
-        $l = jirafeau_get_link ($link);
-        if ($l['md5'] == $md5)
+        $dir = scandir ($d);
+
+        foreach ($dir as $node)
         {
-            $count++;
-            jirafeau_delete ($link);
+            if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
+                preg_match ('/\.tmp/i', "$node"))
+                continue;
+            
+            if (is_dir ($d . $node))
+            {
+                /* Push new found directory. */
+                $stack[] = $d . $node . '/';
+            }
+            elseif (is_file ($d . $node))
+            {
+                /* Read link informations. */
+                $l = jirafeau_get_link (basename ($node));
+                if (!count ($l))
+                    continue;
+                if ($l['md5'] == $md5)
+                {
+                    $count++;
+                    jirafeau_delete_link ($node);
+                }   
+            }
         }
     }
-
-    if (file_exists (VAR_FILES . $md5 . '_count'))
-        unlink (VAR_FILES . $md5. '_count');
-    if (file_exists (VAR_FILES . $md5))
-        unlink (VAR_FILES . $md5);
-
+    jirafeau_clean_rm_file ($md5);
     return $count;
 }
 
@@ -164,15 +314,16 @@ jirafeau_delete_file ($md5)
  * @param $one_time_download is the file a one time download ?
  * @param $key if not empty, protect the file with this key
  * @param $time the time of validity of the file
- * @param $cfg the current configuration
  * @param $ip uploader's ip
+ * @param $crypt boolean asking to crypt or not
+ * @param $link_name_length size of the link name
  * @returns an array containing some information
  *   'error' => information on possible errors
  *   'link' => the link name of the uploaded file
  *   'delete_link' => the link code to delete file
  */
 function
-jirafeau_upload ($file, $one_time_download, $key, $time, $cfg, $ip)
+jirafeau_upload ($file, $one_time_download, $key, $time, $ip, $crypt, $link_name_length)
 {
     if (empty ($file['tmp_name']) || !is_uploaded_file ($file['tmp_name']))
     {
@@ -187,19 +338,33 @@ jirafeau_upload ($file, $one_time_download, $key, $time, $cfg, $ip)
     /* 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']);
-    $name = trim ($file['name']);
+    $name = str_replace (NL, '', trim ($file['name']));
     $mime_type = $file['type'];
     $size = $file['size'];
 
     /* does file already exist ? */
     $rc = false;
-    if (file_exists ( VAR_FILES . $md5))
+    $p = s2p ("$md5");
+    if (file_exists (VAR_FILES . $p .  $md5))
     {
         $rc = unlink ($file['tmp_name']);
     }
-    elseif (move_uploaded_file ($file['tmp_name'],  VAR_FILES . $md5))
+    elseif ((file_exists (VAR_FILES . $p) || @mkdir (VAR_FILES . $p, 0755, true))
+            && move_uploaded_file ($file['tmp_name'], VAR_FILES . $p . $md5))
     {
         $rc = true;
     }
@@ -208,71 +373,73 @@ jirafeau_upload ($file, $one_time_download, $key, $time, $cfg, $ip)
         return (array(
                  'error' =>
                    array ('has_error' => true,
-                          'why' => _('Internal error during file creation. ')),
+                          'why' => t('Internal error during file creation.')),
                  'link' =>'',
                  'delete_link' => ''));
     }
 
-    /* increment or create count file */
+    /* Increment or create count file. */
     $counter = 0;
-    if (file_exists (VAR_FILES . $md5 . '_count'))
+    if (file_exists (VAR_FILES . $p . $md5 . '_count'))
     {
-        $content = file ( VAR_FILES . $md5. '_count');
+        $content = file (VAR_FILES . $p . $md5. '_count');
         $counter = trim ($content[0]);
     }
     $counter++;
-    $handle = fopen ( VAR_FILES . $md5. '_count', 'w');
+    $handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
     fwrite ($handle, $counter);
     fclose ($handle);
 
     /* Create delete code. */
-    $delete_link_code = 0;
-    for ($i = 0; $i < 8; $i++)
-        $delete_link_code .= dechex (rand (0, 16));
+    $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 */
-    $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') . NL. $ip . NL.
-            $delete_link_code . NL);
+            $name . NL. $mime_type . NL. $size . NL. $password . NL. $time .
+            NL . $md5. NL . ($one_time_download ? 'O' : 'R') . NL . date ('U') .
+            NL . $ip . NL. $delete_link_code . NL . ($crypted ? 'C' : 'O'));
     fclose ($handle);
-    $md5_link = md5_file ($link_tmp_name);
-    if (!rename ($link_tmp_name,  VAR_LINKS . $md5_link))
+    $md5_link = substr(base_16_to_64 (md5_file ($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 . $md5_link))
     {
-        unlink ($link_tmp_name);
+        if (file_exists ($link_tmp_name))
+            unlink ($link_tmp_name);
+        
         $counter--;
         if ($counter >= 1)
         {
-            $handle = fopen ( VAR_FILES . $md5. '_count', 'w');
+            $handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
             fwrite ($handle, $counter);
             fclose ($handle);
         }
         else
         {
-            unlink ( VAR_FILES . $md5. '_count');
-            unlink ( VAR_FILES . $md5);
+            jirafeau_clean_rm_file ($md5_link);
         }
-        return (array(
+        return array(
                  'error' =>
                    array ('has_error' => true,
-                          'why' => _('Internal error during file creation. ')),
+                          'why' => t('Internal error during file creation. ')),
                  'link' =>'',
-                 'delete_link' => ''));
+                 'delete_link' => '');
     }
-   return (array ('error' => $noerr,
+   return array ( 'error' => $noerr,
                   'link' => $md5_link,
-                  'delete_link' => $delete_link_code));
+                  'delete_link' => $delete_link_code,
+                  'crypt_key' => $crypt_key);
 }
 
 /**
- * tells if a mime-type is viewable in a browser
+ * Tells if a mime-type is viewable in a browser
  * @param $mime the mime type
  * @returns a boolean telling if a mime type is viewable
  */
@@ -282,14 +449,13 @@ jirafeau_is_viewable ($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);
     }
     return false;
 }
 
-
 // Error handling functions.
 //! Global array that contains all registered errors.
 $error_list = array ();
@@ -335,6 +501,29 @@ show_errors ()
     }
 }
 
+function check_errors ($cfg)
+{
+    if (file_exists (JIRAFEAU_ROOT . 'install.php')
+        && !($cfg['installation_done'] === true))
+    {
+        header('Location: install.php'); 
+        exit;
+    }
+
+    /* check if the destination dirs are writable */
+    $writable = is_writable (VAR_FILES) && is_writable (VAR_LINKS);
+
+    /* Checking for errors. */
+    if (!is_writable (VAR_FILES))
+        add_error (t('The file directory is not writable!'), VAR_FILES);
+
+    if (!is_writable (VAR_LINKS))
+        add_error (t('The link directory is not writable!'), VAR_LINKS);
+    
+    if (!is_writable (VAR_ASYNC))
+        add_error (t('The async directory is not writable!'), VAR_ASYNC);
+}
+
 /**
  * Read link informations
  * @return array containing informations.
@@ -343,7 +532,7 @@ function
 jirafeau_get_link ($hash)
 {
     $out = array ();
-    $link = VAR_LINKS . $hash;
+    $link = VAR_LINKS . s2p ("$hash") . $hash;
 
     if (!file_exists ($link))
         return $out;
@@ -359,87 +548,104 @@ jirafeau_get_link ($hash)
     $out['upload_date'] = trim ($c[7]);
     $out['ip'] = trim ($c[8]);
     $out['link_code'] = trim ($c[9]);
+    $out['crypted'] = trim ($c[10]) == 'C';
     
     return $out;
 }
 
-function
-jirafeau_human_size ($octets)
-{
-    $u = array ('B', 'KB', 'MB', 'GB', 'TB');
-    $o = max ($octets, 0);
-    $p = min (floor (($o ? log ($o) : 0) / log (1024)), count ($u) - 1);
-    $o /= pow (1024, $p);
-    return round ($o, 1) . $u[$p];
-} 
-
 /**
  * List files in admin interface.
  */
 function
 jirafeau_admin_list ($name, $file_hash, $link_hash)
 {
-    $links_dir = scandir (VAR_LINKS);
     echo '<fieldset><legend>';
     if (!empty ($name))
-        echo $name . ' ';
+        echo t('Filename') . ": $name ";
     if (!empty ($file_hash))
-        echo $file_hash . ' ';
+        echo t('file') . ": $file_hash ";
     if (!empty ($link_hash))
-        echo $link_hash . ' ';
+        echo t('link') . ": $link_hash ";
     if (empty ($name) && empty ($file_hash) && empty ($link_hash))
-        echo _('List all files');
+        echo t('List all files');
     echo '</legend>';
     echo '<table>';
     echo '<tr>';
-    echo '<td>' . _('Filename') . '</td>';
-    echo '<td>' . _('Type') . '</td>';
-    echo '<td>' . _('Size') . '</td>';
-    echo '<td>' . _('Expire') . '</td>';
-    echo '<td>' . _('Onetime') . '</td>';
-    echo '<td>' . _('Upload date') . '</td>';
-    echo '<td>' . _('Origin') . '</td>';
-    echo '<td>' . _('Action') . '</td>';
+    echo '<td>' . t('Filename') . '</td>';
+    echo '<td>' . t('Type') . '</td>';
+    echo '<td>' . t('Size') . '</td>';
+    echo '<td>' . t('Expire') . '</td>';
+    echo '<td>' . t('Onetime') . '</td>';
+    echo '<td>' . t('Upload date') . '</td>';
+    echo '<td>' . t('Origin') . '</td>';
+    echo '<td>' . t('Action') . '</td>';
     echo '</tr>';
-    foreach ($links_dir as $link)
+
+    /* Get all links files. */
+    $stack = array (VAR_LINKS);
+    while (($d = array_shift ($stack)) && $d != NULL)
     {
-        if (strcmp ($link, '.') == 0 || strcmp ($link, '..') == 0 ||
-            preg_match ('/\.tmp/i', "$link"))
-            continue;
-        /* Read link informations. */
-        $l = jirafeau_get_link ($link);
-        
-        /* Filter. */
-        if (!empty ($name) && $name != $l['file_name'])
-            continue;
-        if (!empty ($file_hash) && $file_hash != $l['md5'])
-            continue;
-        if (!empty ($link_hash) && $link_hash != $link)
-            continue;
-        
-        /* Print link informations. */
-        echo '<tr>';
-        echo '<td>' . $l['file_name'] . '</td>';
-        echo '<td>' . $l['mime_type'] . '</td>';
-        echo '<td>' . jirafeau_human_size ($l['file_size']) . '</td>';
-        echo '<td>' . ($l['time'] == -1 ? '' : strftime ('%c', $l['time'])) .
-             '</td>';
-        echo '<td>' . $l['onetime'] . '</td>';
-        echo '<td>' . strftime ('%c', $l['upload_date']) . '</td>';
-        echo '<td>' . $l['ip'] . '</td>';
-        echo '<td>' .
-        '<form action = "admin.php" method = "post">' .
-        '<input type = "hidden" name = "action" value = "delete_link"/>' .
-        '<input type = "hidden" name = "link" value = "' . $link . '"/>' .
-        '<input type = "submit" value = "' . _('Del link') . '" />' .
-        '</form>' .
-        '<form action = "admin.php" method = "post">' .
-        '<input type = "hidden" name = "action" value = "delete_file"/>' .
-        '<input type = "hidden" name = "md5" value = "' . $l['md5'] . '"/>' .
-        '<input type = "submit" value = "' . _('Del file and links') . '" />' .
-        '</form>' .
-        '</td>';
-        echo '</tr>';
+        $dir = scandir ($d);
+        foreach ($dir as $node)
+        {
+            if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
+                preg_match ('/\.tmp/i', "$node"))
+                continue;
+            if (is_dir ($d . $node))
+            {
+                /* Push new found directory. */
+                $stack[] = $d . $node . '/';
+            }
+            elseif (is_file ($d . $node))
+            {
+                /* Read link informations. */
+                $l = jirafeau_get_link ($node);
+                if (!count ($l))
+                    continue;
+
+                /* Filter. */
+                if (!empty ($name) && !preg_match ("/$name/i", htmlspecialchars($l['file_name'])))
+                    continue;
+                if (!empty ($file_hash) && $file_hash != $l['md5'])
+                    continue;
+                if (!empty ($link_hash) && $link_hash != $node)
+                    continue;
+                /* Print link informations. */
+                echo '<tr>';
+                echo '<td>' .
+                '<form action = "admin.php" method = "post">' .
+                '<input type = "hidden" name = "action" value = "download"/>' .
+                '<input type = "hidden" name = "link" value = "' . $node . '"/>' .
+                '<input type = "submit" value = "' . htmlspecialchars($l['file_name']) . '" />' .
+                '</form>';
+                echo '</td>';
+                echo '<td>' . $l['mime_type'] . '</td>';
+                echo '<td>' . jirafeau_human_size ($l['file_size']) . '</td>';
+                echo '<td>' . ($l['time'] == -1 ? '' : strftime ('%c', $l['time'])) .
+                     '</td>';
+                echo '<td>';
+                if ($l['onetime'] == 'O')
+                    echo 'Y';
+                else
+                    echo 'N';
+                echo '</td>';
+                echo '<td>' . strftime ('%c', $l['upload_date']) . '</td>';
+                echo '<td>' . $l['ip'] . '</td>';
+                echo '<td>' .
+                '<form action = "admin.php" method = "post">' .
+                '<input type = "hidden" name = "action" value = "delete_link"/>' .
+                '<input type = "hidden" name = "link" value = "' . $node . '"/>' .
+                '<input type = "submit" value = "' . t('Del link') . '" />' .
+                '</form>' .
+                '<form action = "admin.php" method = "post">' .
+                '<input type = "hidden" name = "action" value = "delete_file"/>' .
+                '<input type = "hidden" name = "md5" value = "' . $l['md5'] . '"/>' .
+                '<input type = "submit" value = "' . t('Del file and links') . '" />' .
+                '</form>' .
+                '</td>';
+                echo '</tr>';
+            }
+        }
     }
     echo '</table></fieldset>';
 }
@@ -451,24 +657,703 @@ jirafeau_admin_list ($name, $file_hash, $link_hash)
 function
 jirafeau_admin_clean ()
 {
-    $c = 0;
-    $links_dir = scandir (VAR_LINKS);
+    $count = 0;
+    /* Get all links files. */
+    $stack = array (VAR_LINKS);
+    while (($d = array_shift ($stack)) && $d != NULL)
+    {
+        $dir = scandir ($d);
 
-    foreach ($links_dir as $link)
+        foreach ($dir as $node)
+        {
+            if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
+                preg_match ('/\.tmp/i', "$node"))
+                continue;
+            
+            if (is_dir ($d . $node))
+            {
+                /* Push new found directory. */
+                $stack[] = $d . $node . '/';
+            }
+            elseif (is_file ($d . $node))
+            {
+                /* Read link informations. */
+                $l = jirafeau_get_link (basename ($node));
+                if (!count ($l))
+                    continue;
+                $p = s2p ($l['md5']);
+                if ($l['time'] > 0 && $l['time'] < time () || // expired
+                    !file_exists (VAR_FILES . $p . $l['md5']) || // invalid
+                    !file_exists (VAR_FILES . $p . $l['md5'] . '_count')) // invalid
+                {
+                    jirafeau_delete_link ($node);
+                    $count++;
+                }
+            }
+        }
+    }
+    return $count;
+}
+
+
+/**
+ * Clean old async transferts.
+ * @return number of cleaned files.
+ */
+function
+jirafeau_admin_clean_async ()
+{
+    $count = 0;
+    /* Get all links files. */
+    $stack = array (VAR_ASYNC);
+    while (($d = array_shift ($stack)) && $d != NULL)
     {
-        if (strcmp ($link, '.') == 0 || strcmp ($link, '..') == 0 ||
-            preg_match ('/\.tmp/i', "$link"))
-            continue;
-        /* Read link informations. */
-        $l = jirafeau_get_link ($link);
-        if ($l['time'] > 0 && $l['time'] < time () || // expired
-            !file_exists (VAR_FILES . $l['md5']) || // invalid
-            !file_exists (VAR_FILES . $l['md5'] . '_count')) // invalid
+        $dir = scandir ($d);
+
+        foreach ($dir as $node)
+        {
+            if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
+                preg_match ('/\.tmp/i', "$node"))
+                continue;
+            
+            if (is_dir ($d . $node))
+            {
+                /* Push new found directory. */
+                $stack[] = $d . $node . '/';
+            }
+            elseif (is_file ($d . $node))
+            {
+                /* Read async informations. */
+                $a = jirafeau_get_async_ref (basename ($node));
+                if (!count ($a))
+                    continue;
+                /* Delete transferts older than 1 hour. */
+                if (date ('U') - $a['last_edited'] > 3600)
+                {
+                    jirafeau_async_delete (basename ($node));
+                    $count++;
+                }
+            }
+        }
+    }
+    return $count;
+}
+/**
+ * Read async transfert informations
+ * @return array containing informations.
+ */
+function
+jirafeau_get_async_ref ($ref)
+{
+    $out = array ();
+    $refinfos = VAR_ASYNC . s2p ("$ref") . "$ref";
+
+    if (!file_exists ($refinfos))
+        return $out;
+    
+    $c = file ($refinfos);
+    $out['file_name'] = trim ($c[0]);
+    $out['mime_type'] = trim ($c[1]);
+    $out['key'] = trim ($c[2], NL);
+    $out['time'] = trim ($c[3]);
+    $out['onetime'] = trim ($c[4]);
+    $out['ip'] = trim ($c[5]);
+    $out['last_edited'] = trim ($c[6]);
+    $out['next_code'] = trim ($c[7]);
+    return $out;
+}
+
+/**
+ * Delete async transfert informations
+ */
+function
+jirafeau_async_delete ($ref)
+{
+    $p = s2p ("$ref");
+    if (file_exists (VAR_ASYNC . $p . $ref))
+        unlink (VAR_ASYNC . $p . $ref);
+    if (file_exists (VAR_ASYNC . $p . $ref . '_data'))
+        unlink (VAR_ASYNC . $p . $ref . '_data');
+    $parse = VAR_ASYNC . $p;
+    $scan = array();
+    while (file_exists ($parse)
+           && ($scan = scandir ($parse))
+           && count ($scan) == 2 // '.' and '..' folders => empty.
+           && basename ($parse) != basename (VAR_ASYNC)) 
+    {
+        rmdir ($parse);
+        $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
+    }
+}
+
+/**
+  * Init a new asynchronous upload.
+  * @param $finename Name of the file to send
+  * @param $one_time One time upload parameter
+  * @param $key eventual password (or blank)
+  * @param $time time limit
+  * @param $ip ip address of the client
+  * @return a string containing a temporary reference followed by a code or the string 'Error'
+  */
+function
+jirafeau_async_init ($filename, $type, $one_time, $key, $time, $ip)
+{
+    $res = 'Error';
+
+    /* Create temporary folder. */
+    $ref;
+    $p;
+    $code = jirafeau_gen_random (4);
+    do
+    {
+        $ref = jirafeau_gen_random (32);
+        $p = VAR_ASYNC . s2p ($ref);
+    } while (file_exists ($p));
+    @mkdir ($p, 0755, true);
+    if (!file_exists ($p))
+    {
+        echo 'Error';
+        return;
+    }
+    
+    /* md5 password or empty */
+    $password = '';
+    if (!empty ($key))
+        $password = md5 ($key);
+
+    /* Store informations. */
+    $p .= $ref;
+    $handle = fopen ($p, 'w');
+    fwrite ($handle,
+            str_replace (NL, '', trim ($filename)) . NL .
+            str_replace (NL, '', trim ($type)) . NL . $password . NL .
+            $time . NL . ($one_time ? 'O' : 'R') . NL . $ip . NL .
+            date ('U') . NL . $code . NL);
+    fclose ($handle);
+
+    return $ref . NL . $code ;
+}
+
+/**
+  * Append a piece of file on the asynchronous upload.
+  * @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, $max_file_size)
+{
+    /* Get async infos. */
+    $a = jirafeau_get_async_ref ($ref);
+    
+    /* Check some errors. */
+    if (count ($a) == 0
+        || $a['next_code'] != "$code"
+        || empty ($data['tmp_name'])
+        || !is_uploaded_file ($data['tmp_name']))
+        return 'Error';
+    
+    $p = s2p ($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. */
+    $r = fopen ($r_path, 'r');
+    $w = fopen ($w_path, 'a');
+    while (!feof ($r))
+    {
+        if (fwrite ($w, fread ($r, 1024)) === false)
+        {
+            fclose ($r);
+            fclose ($w);
+            jirafeau_async_delete ($ref);
+            return 'Error';
+        }
+    }
+    fclose ($r);
+    fclose ($w);
+    unlink ($r_path);
+    
+    /* Update async file. */
+    $code = jirafeau_gen_random (4);
+    $handle = fopen (VAR_ASYNC . $p . $ref, 'w');
+    fwrite ($handle,
+            $a['file_name'] . NL. $a['mime_type'] . NL. $a['key'] . NL .
+            $a['time'] . NL . $a['onetime'] . NL . $a['ip'] . NL .
+            date ('U') . NL . $code . NL);
+    fclose ($handle);
+    return $code;
+}
+
+/**
+  * 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 $link_name_length link name length
+  * @return a string containing the download reference followed by a delete code or the string 'Error'
+  */
+function
+jirafeau_async_end ($ref, $code, $crypt, $link_name_length)
+{
+    /* Get async infos. */
+    $a = jirafeau_get_async_ref ($ref);
+    if (count ($a) == 0
+        || $a['next_code'] != "$code")
+        return "Error";
+    
+    /* Generate link infos. */
+    $p = VAR_ASYNC . s2p ($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);
+    $delete_link_code = jirafeau_gen_random (5);
+    
+    /* File already exist ? */ 
+    if (!file_exists (VAR_FILES . $np))
+        @mkdir (VAR_FILES . $np, 0755, true);
+    if (!file_exists (VAR_FILES . $np . $md5))
+        rename ($p, VAR_FILES . $np . $md5);
+    
+    /* Increment or create count file. */
+    $counter = 0;
+    if (file_exists (VAR_FILES . $np . $md5 . '_count'))
+    {
+        $content = file (VAR_FILES . $np . $md5. '_count');
+        $counter = trim ($content[0]);
+    }
+    $counter++;
+    $handle = fopen (VAR_FILES . $np . $md5. '_count', 'w');
+    fwrite ($handle, $counter);
+    fclose ($handle);
+    
+    /* Create link. */
+    $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 .
+            date ('U') . NL . $a['ip'] . NL . $delete_link_code . NL . ($crypted ? 'C' : 'O'));
+    fclose ($handle);
+    $md5_link = substr(base_16_to_64 (md5_file ($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 . $md5_link))
+        echo "Error";
+    
+    /* Clean async upload. */
+    jirafeau_async_delete ($ref);
+    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') == false)
+        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;
+}
+
+/**
+ * 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;
+}
+
+/** Tell if we have some HTTP headers generated by a proxy */
+function
+has_http_forwarded()
+{
+    return
+        !empty ($_SERVER['HTTP_X_FORWARDED_FOR']) ||
+        !empty ($_SERVER['http_X_forwarded_for']);
+}
+
+/**
+ * Generate IP list from HTTP headers generated by a proxy
+ * @return  array of IP strings
+ */
+function
+get_ip_list_http_forwarded()
+{
+    $ip_list = array();
+    if (!empty ($_SERVER['HTTP_X_FORWARDED_FOR']))
+    {
+        $l = explode (',', $_SERVER['HTTP_X_FORWARDED_FOR']);
+        if ($l === FALSE)
+            return array();
+        foreach ($l as $ip)
+            array_push ($ip_list, preg_replace ('/\s+/', '', $ip));
+    }
+    if (!empty ($_SERVER['http_X_forwarded_for']))
+    {
+        $l = explode (',', $_SERVER['http_X_forwarded_for']);
+        foreach ($l as $ip)
         {
-            jirafeau_delete ($link);
-            $c++;
+            // Separate IP from port
+            $ipa = explode (':', $ip);
+            if ($ipa === FALSE)
+                continue;
+            $ip = $ipa[0];
+            array_push ($ip_list, preg_replace ('/\s+/', '', $ip));
         }
     }
-    return $c;
+    return $ip_list;
+}
+
+/**
+ * Get the ip address of the client from REMOTE_ADDR
+ * or from HTTP_X_FORWARDED_FOR if behind a proxy
+ * @returns the client ip address
+ */
+function
+get_ip_address($cfg)
+{
+    $remote = $_SERVER['REMOTE_ADDR'];
+    if (count ($cfg['proxy_ip']) == 0 || !has_http_forwarded ())
+        return $remote;
+
+    $ip_list = get_ip_list_http_forwarded ();
+    if (count ($ip_list) == 0)
+        return $remote;
+
+    foreach ($cfg['proxy_ip'] as $proxy_ip)
+    {
+        if ($remote != $proxy_ip)
+            continue;
+        // Take the last IP (the one which has been set by the defined proxy).
+        return end ($ip_list);
+    }
+    return $remote;
 }
-?>
+
+/**
+ * Convert hexadecimal string to base64
+ */
+function hex_to_base64($hex)
+{
+    $b = '';
+    foreach (str_split ($hex, 2) as $pair)
+        $b .= chr (hexdec ($pair));
+    return base64_encode ($b);
+}
+
+/**
+ * Read alias informations
+ * @return array containing informations.
+ */
+function
+jirafeau_get_alias ($hash)
+{
+    $out = array ();
+    $link = VAR_ALIAS . s2p ("$hash") . $hash;
+
+    if (!file_exists ($link))
+        return $out;
+    
+    $c = file ($link);
+    $out['md5_password'] = trim ($c[0]);
+    $out['ip'] = trim ($c[1]);
+    $out['update_date'] = trim ($c[2]);
+    $out['destination'] = trim ($c[3], NL);
+   
+    return $out;
+}
+
+/** Create an alias to a jirafeau's link.
+ * @param $alias alias name
+ * @param $destination reference of the destination
+ * @param $password password to protect alias
+ * @param $ip client's IP
+ * @return  a string containing the edit code of the alias or the string "Error"
+ */
+function
+jirafeau_alias_create ($alias, $destination, $password, $ip)
+{
+    /* Check that alias and password are long enough. */
+    if (strlen ($alias) < 8 ||
+        strlen ($alias) > 32 ||
+        strlen ($password) < 8 ||
+        strlen ($password) > 32)
+        return 'Error';
+
+    /* Check that destination exists. */
+    $l = jirafeau_get_link ($destination);
+    if (!count ($l))
+        return 'Error';
+
+    /* Check that alias does not already exists. */
+    $alias = md5 ($alias);
+    $p = VAR_ALIAS . s2p ($alias);
+    if (file_exists ($p))
+        return 'Error';
+    
+    /* Create alias folder. */
+    @mkdir ($p, 0755, true);
+    if (!file_exists ($p))
+        return 'Error';
+    
+    /* Generate password. */
+    $md5_password = md5 ($password);
+
+    /* Store informations. */
+    $p .= $alias;
+    $handle = fopen ($p, 'w');
+    fwrite ($handle,
+            $md5_password . NL .
+            $ip . NL .
+            date ('U') . NL .
+            $destination . NL);
+    fclose ($handle);
+
+    return 'Ok';
+}
+
+/** Update an alias.
+ * @param $alias alias to update
+ * @param $destination reference of the new destination
+ * @param $password password to protect alias
+ * @param $new_password optional new password to protect alias
+ * @param $ip client's IP
+ * @return "Ok" or "Error" string
+ */
+function
+jirafeau_alias_update ($alias, $destination, $password,
+                       $new_password, $ip)
+{
+    $alias = md5 ($alias);
+    /* Check that alias exits. */
+    $a = jirafeau_get_alias ($alias);
+    if (!count ($a))
+        return 'Error';
+
+    /* Check that destination exists. */
+    $l = jirafeau_get_link ($a["destination"]);
+    if (!count ($l))
+        return 'Error';
+
+    /* Check password. */
+    if ($a["md5_password"] != md5 ($password))
+        return 'Error';
+
+    $p = $a['md5_password'];
+    if (strlen ($new_password) >= 8 &&
+        strlen ($new_password) <= 32)
+        $p = md5 ($new_password);
+    else if (strlen ($new_password) > 0)
+        return 'Error';
+
+    /* Rewrite informations. */
+    $p = VAR_ALIAS . s2p ($alias) . $alias;
+    $handle = fopen ($p, 'w');
+    fwrite ($handle,
+            $p . NL .
+            $ip . NL .
+            date ('U') . NL .
+            $destination . NL);
+    fclose ($handle);
+    return 'Ok';
+}
+
+/** Get an alias.
+ * @param $alias alias to get
+ * @return alias destination or "Error" string
+ */
+function
+jirafeau_alias_get ($alias)
+{
+    $alias = md5 ($alias);
+    /* Check that alias exits. */
+    $a = jirafeau_get_alias ($alias);
+    if (!count ($a))
+        return 'Error';
+
+    return $a['destination'];
+}
+
+function
+jirafeau_clean_rm_alias ($alias)
+{
+    $p = s2p ("$alias");
+    if (file_exists (VAR_ALIAS . $p . $alias))
+        unlink (VAR_ALIAS . $p . $alias);
+    $parse = VAR_ALIAS . $p;
+    $scan = array();
+    while (file_exists ($parse)
+           && ($scan = scandir ($parse))
+           && count ($scan) == 2 // '.' and '..' folders => empty.
+           && basename ($parse) != basename (VAR_ALIAS)) 
+    {
+        rmdir ($parse);
+        $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
+    }
+}
+
+/** Delete an alias.
+ * @param $alias alias to delete
+ * @param $password password to protect alias
+ * @return "Ok" or "Error" string
+ */
+function
+jirafeau_alias_delete ($alias, $password)
+{
+    $alias = md5 ($alias);
+    /* Check that alias exits. */
+    $a = jirafeau_get_alias ($alias);
+    if (!count ($a))
+        return "Error";
+
+    /* Check password. */
+    if ($a["md5_password"] != md5 ($password))
+        return 'Error';
+
+    jirafeau_clean_rm_alias ($alias);
+    return 'Ok';
+}
+