X-Git-Url: https://git.p6c8.net/jirafeau_project.git/blobdiff_plain/3cf8b39b331dd5f80c4ac674d13a6387d01d49b9..f07477cb289eb839af7255b25188765d5e49ad94:/lib/functions.php?ds=sidebyside

diff --git a/lib/functions.php b/lib/functions.php
index bb49079..2817aa1 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
@@ -15,19 +16,173 @@
  *  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];
+}
+
+// Convert UTC timestamp to a datetime field
+function jirafeau_get_datetimefield($timestamp)
+{
+    $content = '<span class="datetime" data-datetime="' . strftime('%Y-%m-%d %H:%M', $timestamp) . '">'
+        . strftime('%Y-%m-%d %H:%M', $timestamp) . ' (GMT)</span>';
+    return $content;
+}
+
+function jirafeau_fatal_error($errorText, $cfg = array())
+{
+    echo '<div class="error"><h2>Error</h2><p>' . $errorText . '</p></div>';
+    require(JIRAFEAU_ROOT . 'lib/template/footer.php');
+    exit;
+}
+
+function jirafeau_clean_rm_link($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);
-    switch (strtoupper ($modifier))
-    {
+    $modifier = substr($value, -1);
+    $bytes = substr($value, 0, -1);
+    switch (strtoupper($modifier)) {
     case 'P':
         $bytes *= 1024;
     case 'T':
@@ -38,21 +193,27 @@ function jirafeau_ini_to_bytes ($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 ()
+function 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')));
+    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(jirafeau_get_max_upload_size_bytes());
 }
 
 /**
@@ -60,69 +221,95 @@ jirafeau_get_max_upload_size ()
  * @param $code the error code
  * @returns a string explaining the error
  */
-function
-jirafeau_upload_errstr ($code)
+function jirafeau_upload_errstr($code)
 {
-    switch ($code)
-    {
+    switch ($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
  * @param $link the link's name (hash)
  */
 
-function
-jirafeau_delete ($link)
+function jirafeau_delete_link($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'))
-    {
-        $content = file ( VAR_FILES . $md5. '_count');
-        $counter = trim ($content[0]);
+    if (file_exists(VAR_FILES . $p . $md5. '_count')) {
+        $content = file(VAR_FILES . $p . $md5. '_count');
+        $counter = trim($content[0]);
     }
     $counter--;
 
-    if ($counter >= 1)
-    {
-        $handle = fopen ( VAR_FILES . $md5. '_count', 'w');
-        fwrite ($handle, $counter);
-        fclose ($handle);
+    if ($counter >= 1) {
+        $handle = fopen(VAR_FILES . $p . $md5. '_count', 'w');
+        fwrite($handle, $counter);
+        fclose($handle);
+    }
+
+    if ($counter == 0) {
+        jirafeau_clean_rm_file($md5);
     }
+}
+
+/**
+ * Delete a file and it's links.
+ */
+function jirafeau_delete_file($md5)
+{
+    $count = 0;
+    /* Get all links files. */
+    $stack = array(VAR_LINKS);
+    while (($d = array_shift($stack)) && $d != null) {
+        $dir = scandir($d);
+
+        foreach ($dir as $node) {
+            if (strcmp($node, '.') == 0 || strcmp($node, '..') == 0 ||
+                preg_match('/\.tmp/i', "$node")) {
+                continue;
+            }
 
-    if ($counter == 0 && file_exists ( VAR_FILES . $md5))
-    {
-        unlink ( VAR_FILES . $md5);
-        unlink ( VAR_FILES . $md5. '_count');
+            if (is_dir($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);
+                }
+            }
+        }
     }
+    jirafeau_clean_rm_file($md5);
+    return $count;
 }
 
 /**
@@ -131,143 +318,148 @@ jirafeau_delete ($link)
  * @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, $ip)
+function jirafeau_upload($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($file['tmp_name'])) {
         return (array(
                  'error' =>
-                   array ('has_error' => true,
-                          'why' => jirafeau_upload_errstr ($file['error'])),
+                   array('has_error' => true,
+                          'why' => jirafeau_upload_errstr($file['error'])),
                  'link' => '',
                  'delete_link' => ''));
     }
 
     /* array representing no error */
-    $noerr = array ('has_error' => false, 'why' => '');
+    $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']);
+    $md5 = md5_file($file['tmp_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))
-    {
-        $rc = unlink ($file['tmp_name']);
-    }
-    elseif (move_uploaded_file ($file['tmp_name'],  VAR_FILES . $md5))
-    {
+    $p = s2p("$md5");
+    if (file_exists(VAR_FILES . $p .  $md5)) {
+        $rc = unlink($file['tmp_name']);
+    } elseif ((file_exists(VAR_FILES . $p) || @mkdir(VAR_FILES . $p, 0755, true))
+            && move_uploaded_file($file['tmp_name'], VAR_FILES . $p . $md5)) {
         $rc = true;
     }
-    if (!$rc)
-    {
+    if (!$rc) {
         return (array(
                  'error' =>
-                   array ('has_error' => true,
-                          'why' => _('Internal error during file creation. ')),
+                   array('has_error' => true,
+                          'why' => t('INTERNAL_ERROR_DEL')),
                  'link' =>'',
                  'delete_link' => ''));
     }
 
-    /* increment or create count file */
+    /* Increment or create count file. */
     $counter = 0;
-    if (file_exists (VAR_FILES . $md5 . '_count'))
-    {
-        $content = file ( VAR_FILES . $md5. '_count');
-        $counter = trim ($content[0]);
+    if (file_exists(VAR_FILES . $p . $md5 . '_count')) {
+        $content = file(VAR_FILES . $p . $md5. '_count');
+        $counter = trim($content[0]);
     }
     $counter++;
-    $handle = fopen ( VAR_FILES . $md5. '_count', 'w');
-    fwrite ($handle, $counter);
-    fclose ($handle);
+    $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);
+    if (!empty($key)) {
+        $password = md5($key);
+    }
 
     /* create link file */
-    $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.
-            $delete_link_code . NL);
-    fclose ($handle);
-    $md5_link = md5_file ($link_tmp_name);
-    if (!rename ($link_tmp_name,  VAR_LINKS . $md5_link))
-    {
-        unlink ($link_tmp_name);
-        $counter--;
-        if ($counter >= 1)
-        {
-            $handle = fopen ( VAR_FILES . $md5. '_count', 'w');
-            fwrite ($handle, $counter);
-            fclose ($handle);
+    $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 . time() .
+            NL . $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 . $md5_link)) {
+        if (file_exists($link_tmp_name)) {
+            unlink($link_tmp_name);
         }
-        else
-        {
-            unlink ( VAR_FILES . $md5. '_count');
-            unlink ( VAR_FILES . $md5);
+
+        $counter--;
+        if ($counter >= 1) {
+            $handle = fopen(VAR_FILES . $p . $md5. '_count', 'w');
+            fwrite($handle, $counter);
+            fclose($handle);
+        } else {
+            jirafeau_clean_rm_file($md5_link);
         }
-        return (array(
+        return array(
                  'error' =>
-                   array ('has_error' => true,
-                          'why' => _('Internal error during file creation. ')),
+                   array('has_error' => true,
+                          '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 $mime the mime type
  * @returns a boolean telling if a mime type is viewable
  */
-function
-jirafeau_is_viewable ($mime)
+function jirafeau_is_viewable($mime)
 {
-    if (!empty ($mime))
-    {
+    if (!empty($mime)) {
         /* Actually, verify if mime-type is an image or a text. */
-        $viewable = array ('image', 'text');
-        $decomposed = explode ('/', $mime);
-        return in_array ($decomposed[0], $viewable);
+        $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.
-$error_list = array ();
+$error_list = array();
 
 /**
  * Adds an error to the list of errors.
  * @param $title the error's title
  * @param $description is a human-friendly description of the problem.
  */
-function
-add_error ($title, $description)
+function add_error($title, $description)
 {
     global $error_list;
     $error_list[] = '<p>' . $title. '<br />' . $description. '</p>';
@@ -277,29 +469,821 @@ add_error ($title, $description)
  * Informs whether any error has been registered yet.
  * @return true if there are errors.
  */
-function
-has_error ()
+function has_error()
 {
     global $error_list;
-    return !empty ($error_list);
+    return !empty($error_list);
 }
 
 /**
  * Displays all the errors.
  */
-function
-show_errors ()
+function show_errors()
 {
-    if (has_error ())
-    {
+    if (has_error()) {
         global $error_list;
         echo '<div class="error">';
-        foreach ($error_list as $error)
-        {
+        foreach ($error_list as $error) {
             echo $error;
         }
         echo '</div>';
     }
 }
 
-?>
+function check_errors($cfg)
+{
+    if (file_exists(JIRAFEAU_ROOT . 'install.php')
+        && !($cfg['installation_done'] === true)) {
+        header('Location: install.php');
+        exit;
+    }
+
+    /* Checking for errors. */
+    if (!is_writable(VAR_FILES)) {
+        add_error(t('FILE_DIR_W'), VAR_FILES);
+    }
+
+    if (!is_writable(VAR_LINKS)) {
+        add_error(t('LINK_DIR_W'), VAR_LINKS);
+    }
+
+    if (!is_writable(VAR_ASYNC)) {
+        add_error(t('ASYNC_DIR_W'), VAR_ASYNC);
+    }
+}
+
+/**
+ * Read link informations
+ * @return array containing informations.
+ */
+function jirafeau_get_link($hash)
+{
+    $out = array();
+    $link = VAR_LINKS . s2p("$hash") . $hash;
+
+    if (!file_exists($link)) {
+        return $out;
+    }
+
+    $c = file($link);
+    $out['file_name'] = trim($c[0]);
+    $out['mime_type'] = trim($c[1]);
+    $out['file_size'] = trim($c[2]);
+    $out['key'] = trim($c[3], NL);
+    $out['time'] = trim($c[4]);
+    $out['md5'] = trim($c[5]);
+    $out['onetime'] = trim($c[6]);
+    $out['upload_date'] = trim($c[7]);
+    $out['ip'] = trim($c[8]);
+    $out['link_code'] = trim($c[9]);
+    $out['crypted'] = trim($c[10]) == 'C';
+
+    return $out;
+}
+
+/**
+ * List files in admin interface.
+ */
+function jirafeau_admin_list($name, $file_hash, $link_hash)
+{
+    echo '<fieldset><legend>';
+    if (!empty($name)) {
+        echo t('FILENAME') . ": " . jirafeau_escape($name);
+    }
+    if (!empty($file_hash)) {
+        echo t('FILE') . ": " . jirafeau_escape($file_hash);
+    }
+    if (!empty($link_hash)) {
+        echo t('LINK') . ": " . jirafeau_escape($link_hash);
+    }
+    if (empty($name) && empty($file_hash) && empty($link_hash)) {
+        echo t('LS_FILES');
+    }
+    echo '</legend>';
+    echo '<table>';
+    echo '<tr>';
+    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>';
+
+    /* Get all links files. */
+    $stack = array(VAR_LINKS);
+    while (($d = array_shift($stack)) && $d != null) {
+        $dir = scandir($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("/$name/i", jirafeau_escape($l['file_name']))) {
+                    continue;
+                }
+                if (!empty($file_hash) && $file_hash != $l['md5']) {
+                    continue;
+                }
+                if (!empty($link_hash) && $link_hash != $node) {
+                    continue;
+                }
+                /* Print link informations. */
+                echo '<tr>';
+                echo '<td>' .
+                '<strong><a id="upload_link" href="f.php?h='. jirafeau_escape($node) .'" title="' .
+                    t('DL_PAGE') . '">' . jirafeau_escape($l['file_name']) . '</a></strong>';
+                echo '</td>';
+                echo '<td>' . jirafeau_escape($l['mime_type']) . '</td>';
+                echo '<td>' . jirafeau_human_size($l['file_size']) . '</td>';
+                echo '<td>' . ($l['time'] == -1 ? '∞' : jirafeau_get_datetimefield($l['time'])) . '</td>';
+                echo '<td>';
+                if ($l['onetime'] == 'O') {
+                    echo 'Y';
+                } else {
+                    echo 'N';
+                }
+                echo '</td>';
+                echo '<td>' . jirafeau_get_datetimefield($l['upload_date']) . '</td>';
+                echo '<td>' . $l['ip'] . '</td>';
+                echo '<td>' .
+                '<form method="post">' .
+                '<input type = "hidden" name = "action" value = "download"/>' .
+                '<input type = "hidden" name = "link" value = "' . $node . '"/>' .
+                jirafeau_admin_csrf_field() .
+                '<input type = "submit" value = "' . t('DL') . '" />' .
+                '</form>' .
+                '<form method="post">' .
+                '<input type = "hidden" name = "action" value = "delete_link"/>' .
+                '<input type = "hidden" name = "link" value = "' . $node . '"/>' .
+                jirafeau_admin_csrf_field() .
+                '<input type = "submit" value = "' . t('DEL_LINK') . '" />' .
+                '</form>' .
+                '<form method="post">' .
+                '<input type = "hidden" name = "action" value = "delete_file"/>' .
+                '<input type = "hidden" name = "md5" value = "' . $l['md5'] . '"/>' .
+                jirafeau_admin_csrf_field() .
+                '<input type = "submit" value = "' . t('DEL_FILE_LINKS') . '" />' .
+                '</form>' .
+                '</td>';
+                echo '</tr>';
+            }
+        }
+    }
+    echo '</table></fieldset>';
+}
+
+/**
+ * Clean expired files.
+ * @return number of cleaned files.
+ */
+function jirafeau_admin_clean()
+{
+    $count = 0;
+    /* Get all links files. */
+    $stack = array(VAR_LINKS);
+    while (($d = array_shift($stack)) && $d != null) {
+        $dir = scandir($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. */
+                $l = jirafeau_get_link(basename($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) {
+        $dir = scandir($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 (time() - $a['last_edited'] > 3600) {
+                    jirafeau_async_delete(basename($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 .
+            time() . 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 .
+            time() . 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 .
+            time() . 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 $allowedIpList array of allowed IPs
+ * @param $challengedIp IP to be challenged
+ * @return true if IP is authorized, false otherwise.
+ */
+function jirafeau_challenge_upload_ip($allowedIpList, $challengedIp)
+{
+    // skip if list is empty = all IPs allowed
+    if (count($allowedIpList) == 0) {
+        return true;
+    }
+    // test given IP against each allowed IP
+    foreach ($allowedIpList as $i) {
+        if ($i == $challengedIp) {
+            return true;
+        }
+        // CIDR test for IPv4 only.
+        if (strpos($i, '/') !== false) {
+            list($subnet, $mask) = explode('/', $i);
+            if ((ip2long($challengedIp) & ~((1 << (32 - $mask)) - 1)) == ip2long($subnet)) {
+                return true;
+            }
+        }
+    }
+    return false;
+}
+
+/**
+ * Test if visitor's IP is authorized or password is supplied and authorized
+ * @param $ip IP to be challenged
+ * @param $password password to be challenged
+ * @return true if access is valid, false otherwise.
+ */
+function jirafeau_challenge_upload ($cfg, $ip, $password)
+{
+    // Allow if no ip restrictaion and no password restriction
+    if ((count ($cfg['upload_ip']) == 0) and (count ($cfg['upload_password']) == 0)) {
+        return true;
+    }
+
+    // Allow if ip is in array (no password)
+    foreach ($cfg['upload_ip_nopassword'] 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;
+            }
+        }
+    }
+
+    // Allow if ip is in array
+    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;
+            }
+        }
+    }
+    if (!jirafeau_has_upload_password($cfg)) {
+        return false;
+    }
+
+    foreach ($cfg['upload_password'] as $p) {
+        if ($password == $p) {
+            return true;
+        }
+    }
+    return false;
+}
+
+/** Tell if we have some HTTP headers generated by a proxy */
+function has_http_forwarded()
+{
+    return
+        !empty($_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) {
+            // Separate IP from port
+            $ipa = explode(':', $ip);
+            if ($ipa === false) {
+                continue;
+            }
+            $ip = $ipa[0];
+            array_push($ip_list, preg_replace('/\s+/', '', $ip));
+        }
+    }
+    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);
+}
+
+/**
+ * Replace markers in templates.
+ *
+ * Available markers have the scheme "###MARKERNAME###".
+ *
+ * @param $content string Template text with markers
+ * @param $htmllinebreaks boolean Convert linebreaks to BR-Tags
+ * @return Template with replaced markers
+ */
+function jirafeau_replace_markers($content, $htmllinebreaks = false)
+{
+    $patterns = array(
+        '/###ORGANISATION###/',
+        '/###CONTACTPERSON###/',
+        '/###WEBROOT###/'
+    );
+    $replacements = array(
+        $GLOBALS['cfg']['organisation'],
+        $GLOBALS['cfg']['contactperson'],
+        $GLOBALS['cfg']['web_root']
+    );
+    $content = preg_replace($patterns, $replacements, $content);
+
+    if (true === $htmllinebreaks) {
+        $content = nl2br($content);
+    }
+
+    return $content;
+}
+
+function jirafeau_escape($string)
+{
+    return htmlspecialchars($string, ENT_QUOTES);
+}
+
+function jirafeau_admin_session_start()
+{
+    $_SESSION['admin_auth'] = true;
+    $_SESSION['admin_csrf'] = md5(uniqid(mt_rand(), true));
+}
+
+function jirafeau_admin_session_end()
+{
+    $_SESSION = array();
+    session_destroy();
+}
+
+function jirafeau_admin_session_logged()
+{
+    return isset($_SESSION['admin_auth']) &&
+           isset($_SESSION['admin_csrf']) &&
+           isset($_POST['admin_csrf']) &&
+           $_SESSION['admin_auth'] === true &&
+           $_SESSION['admin_csrf'] === $_POST['admin_csrf'];
+}
+
+function jirafeau_admin_csrf_field()
+{
+    return "<input type='hidden' name='admin_csrf' value='". $_SESSION['admin_csrf'] . "'/>";
+}