[ticket/8713] Do not trim login inputs

Create a function to request variables which are not trimmed.

All requests for passwords (except forum passwords) now use the
untrimmed request function.

PHPBB3-8713

phpBB/includes/acp/acp_language.php

@@ -100,11 +100,11 @@ class acp_language
 			switch ($method)
 			{
 				case 'ftp':
-					$transfer = new ftp(request_var('host', ''), request_var('username', ''), request_var('password', ''), request_var('root_path', ''), request_var('port', ''), request_var('timeout', ''));
+					$transfer = new ftp(request_var('host', ''), request_var('username', ''), $request->untrimed_variable('password', ''), request_var('root_path', ''), request_var('port', ''), request_var('timeout', ''));
 				break;
 
 				case 'ftp_fsock':
-					$transfer = new ftp_fsock(request_var('host', ''), request_var('username', ''), request_var('password', ''), request_var('root_path', ''), request_var('port', ''), request_var('timeout', ''));
+					$transfer = new ftp_fsock(request_var('host', ''), request_var('username', ''), $request->untrimed_variable('password', ''), request_var('root_path', ''), request_var('port', ''), request_var('timeout', ''));
 				break;
 
 				default:
@@ -404,7 +404,7 @@ class acp_language
 						trigger_error($user->lang['INVALID_UPLOAD_METHOD'], E_USER_ERROR);
 					}
 
-					$transfer = new $method(request_var('host', ''), request_var('username', ''), request_var('password', ''), request_var('root_path', ''), request_var('port', ''), request_var('timeout', ''));
+					$transfer = new $method(request_var('host', ''), request_var('username', ''), $request->untrimed_variable('password', ''), request_var('root_path', ''), request_var('port', ''), request_var('timeout', ''));
 
 					if (($result = $transfer->open_session()) !== true)
 					{

phpBB/includes/acp/acp_users.php

@@ -32,7 +32,7 @@ class acp_users
 	{
 		global $config, $db, $user, $auth, $template, $cache;
 		global $phpbb_root_path, $phpbb_admin_path, $phpEx, $table_prefix, $file_uploads;
-		global $phpbb_dispatcher;
+		global $phpbb_dispatcher, $request;
 
 		$user->add_lang(array('posting', 'ucp', 'acp/users'));
 		$this->tpl_name = 'acp_users';
@@ -770,8 +770,8 @@ class acp_users
 						'username'			=> utf8_normalize_nfc(request_var('user', $user_row['username'], true)),
 						'user_founder'		=> request_var('user_founder', ($user_row['user_type'] == USER_FOUNDER) ? 1 : 0),
 						'email'				=> strtolower(request_var('user_email', $user_row['user_email'])),
-						'new_password'		=> request_var('new_password', '', true),
+						'new_password'		=> $request->untrimed_variable('new_password', '', true),
-						'password_confirm'	=> request_var('password_confirm', '', true),
+						'password_confirm'	=> $request->untrimed_variable('password_confirm', '', true),
 					);
 
 					// Validation data - we do not check the password complexity setting here

phpBB/includes/functions.php

@@ -3044,11 +3044,11 @@ function login_box($redirect = '', $l_explain = '', $l_success = '', $admin = fa
 				trigger_error('NO_AUTH_ADMIN');
 			}
 
-			$password	= request_var('password_' . $credential, '', true);
+			$password	= $request->untrimed_variable('password_' . $credential, '', true);
 		}
 		else
 		{
-			$password	= request_var('password', '', true);
+			$password	= $request->untrimed_variable('password', '', true);
 		}
 
 		$username	= request_var('username', '', true);

phpBB/includes/request/request.php

@@ -242,6 +242,69 @@ class phpbb_request implements phpbb_request_interface
 		return $var;
 	}
 
+	/**
+	* Get a variable, but without trimming strings
+	* Same functionality as variable(), except does not run trim() on strings
+	* All variables in GET or POST requests should be retrieved through this function to maximise security.
+	*
+	* @param	string|array	$var_name	The form variable's name from which data shall be retrieved.
+	* 										If the value is an array this may be an array of indizes which will give
+	* 										direct access to a value at any depth. E.g. if the value of "var" is array(1 => "a")
+	* 										then specifying array("var", 1) as the name will return "a".
+	* @param	mixed			$default	A default value that is returned if the variable was not set.
+	* 										This function will always return a value of the same type as the default.
+	* @param	bool			$multibyte	If $default is a string this paramater has to be true if the variable may contain any UTF-8 characters
+	*										Default is false, causing all bytes outside the ASCII range (0-127) to be replaced with question marks
+	* @param	phpbb_request_interface::POST|GET|REQUEST|COOKIE	$super_global
+	* 										Specifies which super global should be used
+	*
+	* @return	mixed	The value of $_REQUEST[$var_name] run through {@link set_var set_var} to ensure that the type is the
+	*					the same as that of $default. If the variable is not set $default is returned.
+	*/
+	public function untrimed_variable($var_name, $default, $multibyte, $super_global = phpbb_request_interface::REQUEST)
+	{
+		$path = false;
+
+		// deep direct access to multi dimensional arrays
+		if (is_array($var_name))
+		{
+			$path = $var_name;
+			// make sure at least the variable name is specified
+			if (empty($path))
+			{
+				return (is_array($default)) ? array() : $default;
+			}
+			// the variable name is the first element on the path
+			$var_name = array_shift($path);
+		}
+
+		if (!isset($this->input[$super_global][$var_name]))
+		{
+			return (is_array($default)) ? array() : $default;
+		}
+		$var = $this->input[$super_global][$var_name];
+
+		if ($path)
+		{
+			// walk through the array structure and find the element we are looking for
+			foreach ($path as $key)
+			{
+				if (is_array($var) && isset($var[$key]))
+				{
+					$var = $var[$key];
+				}
+				else
+				{
+					return (is_array($default)) ? array() : $default;
+				}
+			}
+		}
+
+		$this->type_cast_helper->recursive_set_var($var, $default, $multibyte, false);
+
+		return $var;
+	}
+
 	/**
 	* Shortcut method to retrieve SERVER variables.
 	*

phpBB/includes/request/type_cast_helper.php

@@ -93,15 +93,23 @@ class phpbb_request_type_cast_helper implements phpbb_request_type_cast_helper_i
 	* @param mixed	$type			The variable type. Will be used with {@link settype()}
 	* @param bool	$multibyte		Indicates whether string values may contain UTF-8 characters.
 	* 								Default is false, causing all bytes outside the ASCII range (0-127) to be replaced with question marks.
+	* @param bool	$trim			Indicates whether string values will be be parsed with trim()
+	* 								Default is true
 	*/
-	public function set_var(&$result, $var, $type, $multibyte = false)
+	public function set_var(&$result, $var, $type, $multibyte = false, $trim = true)
 	{
 		settype($var, $type);
 		$result = $var;
 
 		if ($type == 'string')
 		{
-			$result = trim(str_replace(array("\r\n", "\r", "\0"), array("\n", "\n", ''), $result));
+			$result = str_replace(array("\r\n", "\r", "\0"), array("\n", "\n", ''), $result);
+
+			if ($trim)
+			{
+				$result = trim($result);
+			}
+
 			$result = htmlspecialchars($result, ENT_COMPAT, 'UTF-8');
 
 			if ($multibyte)
@@ -141,8 +149,10 @@ class phpbb_request_type_cast_helper implements phpbb_request_type_cast_helper_i
 	* @param	bool	$multibyte	Indicates whether string keys and values may contain UTF-8 characters.
 	* 								Default is false, causing all bytes outside the ASCII range (0-127) to
 	* 								be replaced with question marks.
+	* @param bool	$trim			Indicates whether string values will be be parsed with trim()
+	* 								Default is true
 	*/
-	public function recursive_set_var(&$var, $default, $multibyte)
+	public function recursive_set_var(&$var, $default, $multibyte, $trim = true)
 	{
 		if (is_array($var) !== is_array($default))
 		{
@@ -153,7 +163,7 @@ class phpbb_request_type_cast_helper implements phpbb_request_type_cast_helper_i
 		if (!is_array($default))
 		{
 			$type = gettype($default);
-			$this->set_var($var, $var, $type, $multibyte);
+			$this->set_var($var, $var, $type, $multibyte, $trim);
 		}
 		else
 		{
@@ -174,9 +184,9 @@ class phpbb_request_type_cast_helper implements phpbb_request_type_cast_helper_i
 
 			foreach ($_var as $k => $v)
 			{
-				$this->set_var($k, $k, $key_type, $multibyte, $multibyte);
+				$this->set_var($k, $k, $key_type, $multibyte, $trim);
 
-				$this->recursive_set_var($v, $default_value, $multibyte);
+				$this->recursive_set_var($v, $default_value, $multibyte, $trim);
 				$var[$k] = $v;
 			}
 		}

phpBB/includes/ucp/ucp_profile.php

@@ -46,9 +46,9 @@ class ucp_profile
 				$data = array(
 					'username'			=> utf8_normalize_nfc(request_var('username', $user->data['username'], true)),
 					'email'				=> strtolower(request_var('email', $user->data['user_email'])),
-					'new_password'		=> request_var('new_password', '', true),
+					'new_password'		=> $request->untrimed_variable('new_password', '', true),
-					'cur_password'		=> request_var('cur_password', '', true),
+					'cur_password'		=> $request->untrimed_variable('cur_password', '', true),
-					'password_confirm'	=> request_var('password_confirm', '', true),
+					'password_confirm'	=> $request->untrimed_variable('password_confirm', '', true),
 				);
 
 				add_form_key('ucp_reg_details');

phpBB/includes/ucp/ucp_register.php

@@ -170,8 +170,8 @@ class ucp_register
 
 		$data = array(
 			'username'			=> utf8_normalize_nfc(request_var('username', '', true)),
-			'new_password'		=> request_var('new_password', '', true),
+			'new_password'		=> $request->untrimed_variable('new_password', '', true),
-			'password_confirm'	=> request_var('password_confirm', '', true),
+			'password_confirm'	=> $request->untrimed_variable('password_confirm', '', true),
 			'email'				=> strtolower(request_var('email', '')),
 			'lang'				=> basename(request_var('lang', $user->lang_name)),
 			'tz'				=> request_var('tz', $timezone),

phpBB/install/install_update.php

@@ -862,7 +862,7 @@ class install_update extends module
 					$test_connection = false;
 					if ($test_ftp_connection || $submit)
 					{
-						$transfer = new $method(request_var('host', ''), request_var('username', ''), request_var('password', ''), request_var('root_path', ''), request_var('port', ''), request_var('timeout', ''));
+						$transfer = new $method(request_var('host', ''), request_var('username', ''), $request->untrimed_variable('password', ''), request_var('root_path', ''), request_var('port', ''), request_var('timeout', ''));
 						$test_connection = $transfer->open_session();
 
 						// Make sure that the directory is correct by checking for the existence of common.php
@@ -948,7 +948,7 @@ class install_update extends module
 				}
 				else
 				{
-					$transfer = new $method(request_var('host', ''), request_var('username', ''), request_var('password', ''), request_var('root_path', ''), request_var('port', ''), request_var('timeout', ''));
+					$transfer = new $method(request_var('host', ''), request_var('username', ''), $request->untrimed_variable('password', ''), request_var('root_path', ''), request_var('port', ''), request_var('timeout', ''));
 					$transfer->open_session();
 				}
 

tests/request/type_cast_helper_test.php

@@ -48,4 +48,14 @@ class phpbb_type_cast_helper_test extends phpbb_test_case
 
 		$this->assertEquals($expected, $data);
 	}
+
+	public function test_untrimmed_strings()
+	{
+		$data = array(' eviL<3		 ');
+		$expected = array(' eviL&lt;3		 ');
+
+		$this->type_cast_helper->recursive_set_var($data, '', true, false);
+
+		$this->assertEquals($expected, $data);
+	}
 }