1 files changed, 124 insertions, 0 deletions
diff --git a/inc/mod/auth.php b/inc/mod/auth.php
new file mode 100644
index 00000000..2e90b757
--- /dev/null
+++ b/inc/mod/auth.php
@@ -0,0 +1,124 @@
+<?php
+
+/*
+ *  Copyright (c) 2010-2012 Tinyboard Development Group
+ */
+
+if (realpath($_SERVER['SCRIPT_FILENAME']) == str_replace('\\', '/', __FILE__)) {
+	// You cannot request this file directly.
+	exit;
+}
+
+// create a hash/salt pair for validate logins
+function mkhash($username, $password, $salt = false) {
+	global $config;
+	
+	if (!$salt) {
+		// create some sort of salt for the hash
+		$salt = substr(base64_encode(sha1(rand() . time(), true) . $config['cookies']['salt']), 0, 15);
+		
+		$generated_salt = true;
+	}
+	
+	// generate hash (method is not important as long as it's strong)
+	$hash = substr(base64_encode(md5($username . sha1($username . $password . $salt . ($config['mod']['lock_ip'] ? $_SERVER['REMOTE_ADDR'] : ''), true), true)), 0, 20);
+	
+	if (isset($generated_salt))
+		return Array($hash, $salt);
+	else
+		return $hash;
+}
+
+function login($username, $password, $makehash=true) {
+	global $mod;
+	
+	// SHA1 password
+	if ($makehash) {
+		$password = sha1($password);
+	}
+	
+	$query = prepare("SELECT `id`,`type`,`boards` FROM `mods` WHERE `username` = :username AND `password` = :password LIMIT 1");
+	$query->bindValue(':username', $username);
+	$query->bindValue(':password', $password);
+	$query->execute() or error(db_error($query));
+	
+	if ($user = $query->fetch()) {
+		return $mod = Array(
+			'id' => $user['id'],
+			'type' => $user['type'],
+			'username' => $username,
+			'hash' => mkhash($username, $password),
+			'boards' => explode(',', $user['boards'])
+			);
+	} else return false;
+}
+
+function setCookies() {
+	global $mod, $config;
+	if (!$mod)
+		error('setCookies() was called for a non-moderator!');
+	
+	setcookie($config['cookies']['mod'],
+			$mod['username'] . // username
+			':' . 
+			$mod['hash'][0] . // password
+			':' .
+			$mod['hash'][1], // salt
+		time() + $config['cookies']['expire'], $config['cookies']['jail'] ? $config['cookies']['path'] : '/', null, false, true);
+}
+
+function destroyCookies() {
+	global $config;
+	// Delete the cookies
+	setcookie($config['cookies']['mod'], 'deleted', time() - $config['cookies']['expire'], $config['cookies']['jail']?$config['cookies']['path'] : '/', null, false, true);
+}
+
+function modLog($action, $_board=null) {
+	global $mod, $board, $config;
+	$query = prepare("INSERT INTO `modlogs` VALUES (:id, :ip, :board, :time, :text)");
+	$query->bindValue(':id', $mod['id'], PDO::PARAM_INT);
+	$query->bindValue(':ip', $_SERVER['REMOTE_ADDR']);
+	$query->bindValue(':time', time(), PDO::PARAM_INT);
+	$query->bindValue(':text', $action);
+	if (isset($_board))
+		$query->bindValue(':board', $_board);
+	elseif (isset($board))
+		$query->bindValue(':board', $board['uri']);
+	else
+		$query->bindValue(':board', null, PDO::PARAM_NULL);
+	$query->execute() or error(db_error($query));
+	
+	if ($config['syslog'])
+		_syslog(LOG_INFO, '[mod/' . $mod['username'] . ']: ' . $action);
+}
+
+// Validate session
+
+if (isset($_COOKIE[$config['cookies']['mod']])) {
+	// Should be username:hash:salt
+	$cookie = explode(':', $_COOKIE[$config['cookies']['mod']]);
+	if (count($cookie) != 3) {
+		destroyCookies();
+		error($config['error']['malformed']);
+	}
+	
+	$query = prepare("SELECT `id`, `type`, `boards`, `password` FROM `mods` WHERE `username` = :username LIMIT 1");
+	$query->bindValue(':username', $cookie[0]);
+	$query->execute() or error(db_error($query));
+	$user = $query->fetch();
+	
+	// validate password hash
+	if ($cookie[1] != mkhash($cookie[0], $user['password'], $cookie[2])) {
+		// Malformed cookies
+		destroyCookies();
+		error($config['error']['malformed']);
+	}
+	
+	$mod = Array(
+		'id' => $user['id'],
+		'type' => $user['type'],
+		'username' => $cookie[0],
+		'boards' => explode(',', $user['boards'])
+	);
+}
+