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jirafeau_ynh/sources/lib/functions.php
Julien Malik de694b325c [enh] Upgrade to upstream 6564589a
2016-03-22 11:58:21 +01:00

1359 lines
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<?php
/*
* Jirafeau, your web file repository
* Copyright (C) 2008 Julien "axolotl" BERNARD <axolotl@magieeternelle.org>
* 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
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* 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 <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)
{
$modifier = substr ($value, -1);
$bytes = substr ($value, 0, -1);
switch (strtoupper ($modifier))
{
case 'P':
$bytes *= 1024;
case 'T':
$bytes *= 1024;
case 'G':
$bytes *= 1024;
case 'M':
$bytes *= 1024;
case 'K':
$bytes *= 1024;
}
return $bytes;
}
/**
* gets the maximum upload size according to php.ini
* @returns the maximum upload size in bytes
*/
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')));
}
/**
* 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 $code the error code
* @returns a string explaining the error
*/
function
jirafeau_upload_errstr ($code)
{
switch ($code)
{
case UPLOAD_ERR_INI_SIZE:
case UPLOAD_ERR_FORM_SIZE:
return t('Your file exceeds the maximum authorized file size. ');
case UPLOAD_ERR_PARTIAL:
case UPLOAD_ERR_NO_FILE:
return
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 t('Internal error. You may not succeed in retrying. ');
}
return t('Unknown error. ');
}
/** Remove link and it's file
* @param $link the link's name (hash)
*/
function
jirafeau_delete_link ($link)
{
$l = jirafeau_get_link ($link);
if (!count ($l))
return;
jirafeau_clean_rm_link ($link);
$md5 = $l['md5'];
$p = s2p ("$md5");
$counter = 1;
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 . $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 (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;
}
/**
* handles an uploaded file
* @param $file the file struct given by $_FILE[]
* @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 $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, $ip, $crypt, $link_name_length)
{
if (empty ($file['tmp_name']) || !is_uploaded_file ($file['tmp_name']))
{
return (array(
'error' =>
array ('has_error' => true,
'why' => jirafeau_upload_errstr ($file['error'])),
'link' => '',
'delete_link' => ''));
}
/* 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']));
$mime_type = $file['type'];
$size = $file['size'];
/* does file already exist ? */
$rc = false;
$p = s2p ("$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)
{
return (array(
'error' =>
array ('has_error' => true,
'why' => t('Internal error during file creation.')),
'link' =>'',
'delete_link' => ''));
}
/* Increment or create count file. */
$counter = 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 . $p . $md5. '_count', 'w');
fwrite ($handle, $counter);
fclose ($handle);
/* Create delete code. */
$delete_link_code = jirafeau_gen_random (5);
/* md5 password or empty. */
$password = '';
if (!empty ($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. $delete_link_code . NL . ($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);
$counter--;
if ($counter >= 1)
{
$handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
fwrite ($handle, $counter);
fclose ($handle);
}
else
{
jirafeau_clean_rm_file ($md5_link);
}
return array(
'error' =>
array ('has_error' => true,
'why' => t('Internal error during file creation. ')),
'link' =>'',
'delete_link' => '');
}
return array ( 'error' => $noerr,
'link' => $md5_link,
'delete_link' => $delete_link_code,
'crypt_key' => $crypt_key);
}
/**
* 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)
{
if (!empty ($mime))
{
/* Actually, verify if mime-type is an image or a 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 ();
/**
* 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)
{
global $error_list;
$error_list[] = '<p>' . $title. '<br />' . $description. '</p>';
}
/**
* Informs whether any error has been registered yet.
* @return true if there are errors.
*/
function
has_error ()
{
global $error_list;
return !empty ($error_list);
}
/**
* Displays all the errors.
*/
function
show_errors ()
{
if (has_error ())
{
global $error_list;
echo '<div class="error">';
foreach ($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;
}
/* check if the destination dirs are writable */
$writable = is_writable (VAR_FILES) && is_writable (VAR_LINKS);
/* Checking for errors. */
if (!is_writable (VAR_FILES))
add_error (t('The file directory is not writable!'), VAR_FILES);
if (!is_writable (VAR_LINKS))
add_error (t('The link directory is not writable!'), VAR_LINKS);
if (!is_writable (VAR_ASYNC))
add_error (t('The async directory is not writable!'), VAR_ASYNC);
}
/**
* Read link informations
* @return array containing informations.
*/
function
jirafeau_get_link ($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') . ": $name ";
if (!empty ($file_hash))
echo t('file') . ": $file_hash ";
if (!empty ($link_hash))
echo t('link') . ": $link_hash ";
if (empty ($name) && empty ($file_hash) && empty ($link_hash))
echo t('List all 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 ("/$name/i", htmlspecialchars($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>';
}
/**
* 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 (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)
{
// 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 ($b);
}
/**
* Read alias informations
* @return array containing informations.
*/
function
jirafeau_get_alias ($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';
}
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