Permanent login

git-svn-id: https://adminer.svn.sourceforge.net/svnroot/adminer/trunk@1281 7c3ca157-0c34-0410-bff1-cbf682f78f5c

adminer/include/adminer.inc.php

@@ -23,6 +23,13 @@ class Adminer {
 		return array($_GET["server"], $_SESSION["usernames"][$_GET["server"]], $_SESSION["passwords"][$_GET["server"]]);
 	}
 	
+	/** Get key used for permanent login
+	* @return string cryptic string which gets combined with password
+	*/
+	function permanentLogin() {
+		return "";
+	}
+	
 	/** Identifier of selected database
 	* @return string
 	*/
@@ -43,6 +50,9 @@ class Adminer {
 <tr><th><?php echo lang('Password'); ?><td><input type="password" name="password">
 </table>
 <?php
+		if ($this->permanentLogin()) {
+			echo "<p>" . checkbox("permanent", 1, $_COOKIE["adminer_permanent"], lang('Permanent login')) . "\n";
+		}
 	}
 	
 	/** Authorize the user

adminer/include/auth.inc.php

@@ -3,8 +3,15 @@ if (isset($_POST["server"])) {
 	session_regenerate_id(); // defense against session fixation
 	$_SESSION["usernames"][$_POST["server"]] = $_POST["username"];
 	$_SESSION["passwords"][$_POST["server"]] = $_POST["password"];
-	if (count($_POST) == 3) { // 3 - count($ignore)
+	if ($_POST["permanent"]) {
-		$location = ((string) $_GET["server"] === $_POST["server"] ? remove_from_uri(session_name()) : preg_replace('~^([^?]*).*~', '\\1', $_SERVER["REQUEST_URI"]) . (strlen($_POST["server"]) ? '?server=' . urlencode($_POST["server"]) : ''));
+		cookie("adminer_permanent",
+			base64_encode($_POST["server"])
+			. ":" . base64_encode($_POST["username"])
+			. ":" . base64_encode(cipher_password($_POST["password"], pack("H*", sha1(str_pad($_POST["username"], 1) . $adminer->permanentLogin())))) // str_pad - to hide original key
+		);
+	}
+	if (count($_POST) == 3 + ($_POST["permanent"] ? 1 : 0)) { // 3 - server, username, password
+		$location = ((string) $_GET["server"] === $_POST["server"] ? remove_from_uri(session_name()) : preg_replace('~^([^?]*).*~', '\\1', ME) . (strlen($_POST["server"]) ? '?server=' . urlencode($_POST["server"]) : ''));
 		if (SID) {
 			$pos = strpos($location, '?');
 			$location = ($pos ? substr_replace($location, SID . "&", $pos + 1, 0) : "$location?" . SID);
@@ -12,7 +19,7 @@ if (isset($_POST["server"])) {
 		redirect($location);
 	}
 	$_GET["server"] = $_POST["server"];
-} elseif (isset($_POST["logout"])) {
+} elseif ($_POST["logout"]) {
 	$token = $_SESSION["tokens"][$_GET["server"]];
 	if ($token && $_POST["token"] != $token) {
 		page_header(lang('Logout'), lang('Invalid CSRF token. Send the form again.'));
@@ -25,8 +32,42 @@ if (isset($_POST["server"])) {
 		if (!isset($_SESSION["passwords"])) { // don't require login to logout
 			$_SESSION["passwords"] = array();
 		}
+		cookie("adminer_permanent", "");
 		redirect(substr(ME, 0, -1), lang('Logout successful.'));
 	}
+} elseif ($_COOKIE["adminer_permanent"] && !isset($_SESSION["usernames"][$_GET["server"]])) {
+	list($server, $username, $cipher) = array_map('base64_decode', explode(":", $_COOKIE["adminer_permanent"]));
+	if (!strlen($_GET["server"]) || $server == $_GET["server"]) {
+		session_regenerate_id(); // defense against session fixation
+		$_SESSION["usernames"][$server] = $username;
+		$_SESSION["passwords"][$server] = decipher_password($cipher, pack("H*", sha1(str_pad($username, 1) . $adminer->permanentLogin())));
+		if (!$_POST && $server != $_GET["server"]) {
+			redirect(preg_replace('~^([^?]*).*~', '\\1', ME) . '?server=' . urlencode($server));
+		}
+	}
+}
+
+/** Cipher password
+* @param string plain-text password
+* @param string binary key, should be longer than $password
+* @return string binary cipher
+*/
+function cipher_password($password, $key) {
+	$password2 = strlen($password) . ":" . str_pad($password, 17);
+	$repeat = ceil(strlen($password2) / strlen($key));
+	return $password2 ^ str_repeat($key, $repeat);
+}
+
+/** Decipher password
+* @param string binary cipher
+* @param string binary key
+* @return string plain-text password
+*/
+function decipher_password($cipher, $key) {
+	$repeat = ceil(strlen($cipher) / strlen($key));
+	$password2 = $cipher ^ str_repeat($key, $repeat);
+	list($length, $password) = explode(":", $password2, 2);
+	return substr($password, 0, $length);
 }
 
 function auth_error($exception = null) {

adminer/lang/cs.inc.php

@@ -226,4 +226,5 @@ $translations = array(
 	'Editor' => 'Editor',
 	'Webserver file %s' => 'Soubor %s na webovém serveru',
 	'File does not exist.' => 'Soubor neexistuje.',
+	'Permanent login' => 'Trvalé přihlášení',
 );

changes.txt

@@ -1,4 +1,5 @@
 Adminer 2.2.2-dev:
+Support for permanent login (customization required)
 Add Delete button to Edit page (regression from 2.0.0)
 Simplify SQL syntax error message
 Print SQL query info if available

editor/include/adminer.inc.php

@@ -11,6 +11,10 @@ class Adminer {
 		return array(); // default INI settings
 	}
 	
+	function permanentLogin() {
+		return "";
+	}
+	
 	function database() {
 		global $connection;
 		$dbs = get_databases(false);
@@ -27,6 +31,9 @@ class Adminer {
 <tr><th><?php echo lang('Password'); ?><td><input type="password" name="password">
 </table>
 <?php
+		if ($this->permanentLogin()) {
+			echo "<p>" . checkbox("permanent", 1, $_COOKIE["adminer_permanent"], lang('Permanent login')) . "\n";
+		}
 	}
 	
 	function login($login, $password) {

todo.txt

@@ -7,7 +7,7 @@ Mass editation of individual rows
 Offer enum and set items in search - whisperer
 Variables editation, especially timezone
 Use event $intervals + microseconds in relative date functions
-Improve concurrency by calling session_write_close before executing command, message id will be sent in query string
+Optionally check IP address
 ? Column and table names auto-completition in SQL textarea
 ? Aliasing of built-in functions can save 7 KB, function minification can save 7 KB, substitution of repetitive $a["a"] can save 4 KB, substitution of $_GET and friends can save 2 KB, JS packer can save 1 KB, not enclosing HTML attribute values can save 1.2 KB, replacing \\n by \n can save .3 KB
 ? Branch binary_compile: LZW compression of translations can save 30 KB, LZW compression of all texts can save 11 KB, remove of base64_decode() + using chars 127-255 in minification can save 1 KB