<?php
/**
* prefs.php
*
* This contains functions for filebased user prefs locations
*
* @copyright 1999-2020 The SquirrelMail Project Team
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
* @version $Id: prefs.php 14840 2020年01月07日 07:42:38Z pdontthink $
* @package squirrelmail
* @subpackage prefs
*/
/** Include global.php */
require_once(SM_PATH . 'functions/global.php');
require_once(SM_PATH . 'functions/plugin.php');
/** include this for error messages */
include_once(SM_PATH . 'functions/display_messages.php');
$rg =
ini_get ('register_globals');
!isset($prefs_cache) ||
) {
$prefs_are_cached = false;
$prefs_cache = array();
}
if (isset
($prefs_backend) &&
!empty($prefs_backend) &&
file_exists (SM_PATH .
$prefs_backend)) { require_once(SM_PATH . $prefs_backend);
} elseif (isset($prefs_dsn) && !empty($prefs_dsn)) {
require_once(SM_PATH . 'functions/db_prefs.php');
} else {
require_once(SM_PATH . 'functions/file_prefs.php');
}
/* Hashing functions */
/**
* Given a username and datafilename, this will return the path to the
* hashed location of that datafile.
*
* @param string username the username of the current user
* @param string dir the squirrelmail datadir
* @param string datafile the name of the file to open
* @param bool hash_seach default true
* @return string the hashed location of datafile
*/
function getHashedFile ($username, $dir, $datafile, $hash_search =
true) {
/* Remove trailing slash from $dir if found */
if (substr ($dir, -
1) ==
'/') { }
/* Compute the hash for this user and extract the hash directories. */
/* First, get and make sure the full hash directory exists. */
$real_hash_dir =
getHashedDir ($username, $dir, $hash_dirs);
/* Set the value of our real data file, after we've removed unwanted characters. */
$result = "$real_hash_dir/$datafile";
/* Check for this file in the real hash directory. */
/* First check the base directory, the most common location. */
rename ("$dir/$datafile", $result);
/* Then check the full range of possible hash directories. */
} else {
$check_hash_dir = $dir;
for ($h = 0; $h < 4; ++$h) {
$check_hash_dir .= '/' . $hash_dirs[$h];
rename ("$check_hash_dir/$datafile", $result); break;
}
}
}
}
/* Return the full hashed datafile path. */
return ($result);
}
/**
* Helper function for getHashedFile(), given a username returns
* the hashed dir for that username.
*
* NOTE that the hashed dir will be created if it doesn't
* already exist.
*
* @param string username the username of the current user
* @param string dir the squirrelmail datadir
* @param string hash_dirs default ''
* @return the path to the hash dir for username
*/
/* Remove trailing slash from $dir if found */
if (substr ($dir, -
1) ==
'/') { }
/* If necessary, populate the hash dir variable. */
if ($hash_dirs == '') {
}
/* Make sure the full hash directory exists. */
$real_hash_dir = $dir;
for ($h = 0; $h < $dir_hash_level; ++$h) {
$real_hash_dir .= '/' . $hash_dirs[$h];
if (!@is_dir ($real_hash_dir)) { if (!@mkdir ($real_hash_dir, 0770)) { echo
sprintf (_ ("Error creating directory %s."), $real_hash_dir) .
'<br />' .
_ ("Could not create hashed directory structure!") .
"<br />\n" .
_ ("Please contact your system administrator and report this error.") .
"<br />\n"; exit;
}
}
}
/* And return that directory. */
return ($real_hash_dir);
}
/**
* Helper function for getHashDir which does the actual hash calculation.
*
* Uses a crc32 algorithm by default, but if you put
* the following in config/config_local.php, you can
* force md5 instead:
* $hash_dirs_use_md5 = TRUE;
*
* You may also specify that if usernames are in full
* email address format, the domain part (beginning
* with "@") be stripped before calculating the crc
* or md5. Do that by putting the following in
* config/config_local.php:
* $hash_dirs_strip_domain = TRUE;
*
* @param string username the username to calculate the hash dir for
*
* @return array a list of hash dirs for this username
*
* @since 1.2.0
*
*/
global $hash_dirs_use_md5, $hash_dirs_strip_domain;
static $hash_dirs = array();
// strip domain from username
if ($hash_dirs_strip_domain)
$user = substr($username, 0, strpos($username, '@'));
else
$user = $username;
// have we already calculated it?
if (!empty($hash_dirs[$user]))
return $hash_dirs[$user];
if ($hash_dirs_use_md5) {
} else {
/* Compute the hash for this user and extract the hash directories. */
/* Note that the crc32() function result will be different on 32 and */
/* 64 bit systems, thus the hack below. */
if ($crc & 0x80000000) {
$crc ^= 0xffffffff;
$crc += 1;
}
}
$my_hash_dirs = array();
for ($h = 0; $h < 4; ++ $h) {
$my_hash_dirs[] =
substr ($hash, $h, 1); }
// Return our array of hash directories
$hash_dirs[$user] = $my_hash_dirs;
return ($my_hash_dirs);
}