<?php

/*

 * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between

 * Copyright (C) 2006-2009 Dan Fuhry

 * Installation package

 * payload.php - Installer payload (the installation logic)

 *

 * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2 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 General Public License for details.

 */

if ( !defined('IN_ENANO_INSTALL') )

	die();

return true;

function stg_sim_good()

{

	return true;

}

function stg_sim_bad()

{

	return true;

}

function stg_password_decode()

{

	global $db;

	global $dh_public, $dh_private, $aes_fallback;

	static $pass = false;

	if ( $pass )

		return $pass;

	if ( empty($_POST['crypt_data']) && !empty($_POST['password']) && $_POST['password'] === $_POST['password_confirm'] )

		$pass = $_POST['password'];

	require_once(ENANO_ROOT . '/includes/rijndael.php');

	require_once(ENANO_ROOT . '/includes/sessions.php');

	try

	{

		$keys = array(

				'public' => $dh_public,

				'private' => $dh_private,

				'aes' => $aes_fallback

			);

		$pass = sessionManager::get_aes_post('password', $keys);

	}

	catch ( Exception $e )

	{

		echo "<p>Exception details:</p><pre>$e</pre>";

		return false;

	}

	return $pass; // Will be true if the password isn't crapped

}

function stg_make_private_key()

{

	global $db;

	static $site_key = false;

	if ( $site_key )

		return $site_key;

	// Is there already a key cached in the database?

	$q = $db->sql_query('SELECT config_value FROM ' . table_prefix . 'config WHERE config_name=\'site_aes_key\';');

	if ( !$q )

		$db->_die();

	if ( $db->numrows() > 0 )

	{

		list($site_key) = $db->fetchrow_num();

		$db->free_result();

		return $site_key;

	}

	$aes = AESCrypt::singleton(AES_BITS, AES_BLOCKSIZE);

	// This will use /dev/urandom if possible

	$site_key = $aes->gen_readymade_key();

	// Stash it in the database, don't check for errors though because we can always regenerate it

	$db->sql_query('INSERT INTO ' . table_prefix . 'config ( config_name, config_value ) VALUES ( \'site_aes_key\', \'' . $site_key . '\' );');

	return $site_key;

}

function stg_load_schema()

{

	global $db, $dbdriver, $installer_version, $lang_id, $languages;

	static $sql_parser = false;

	if ( is_object($sql_parser) )

		return $sql_parser->parse();

	$aes = AESCrypt::singleton(AES_BITS, AES_BLOCKSIZE);

	$hmac_secret = hexencode(AESCrypt::randkey(20), '', '');

	$site_key = stg_make_private_key();

	$site_key = hexdecode($site_key);

	$admin_pass_clean = stg_password_decode();

	$admin_pass = hmac_sha1($admin_pass_clean, $hmac_secret);

	unset($admin_pass_clean); // Security

	try

	{

		$sql_parser = new SQL_Parser( ENANO_ROOT . "/install/schemas/{$dbdriver}_stage2.sql" );

	}

	catch ( Exception $e )

	{

		echo "<pre>$e</pre>";

		return false;

	}

	$vars = array(

			'TABLE_PREFIX'         => table_prefix,

			'SITE_NAME'            => $db->escape($_POST['site_name']),

			'SITE_DESC'            => $db->escape($_POST['site_desc']),

			'COPYRIGHT'            => $db->escape($_POST['copyright']),

			// FIXME: update form

			'WIKI_MODE'            => ( isset($_POST['wiki_mode']) ? '1' : '0' ),

			'ENABLE_CACHE'         => ( is_writable( ENANO_ROOT . '/cache/' ) ? '1' : '0' ),

			'VERSION'              => $installer_version['version'],

			'ADMIN_USER'           => $db->escape($_POST['username']),

			'ADMIN_PASS'           => $admin_pass,

			'ADMIN_PASS_SALT'      => $hmac_secret,

			'ADMIN_EMAIL'          => $db->escape($_POST['email']),

			'REAL_NAME'            => '', // This has always been stubbed.

			'ADMIN_EMBED_PHP'      => strval(AUTH_DISALLOW),

			'UNIX_TIME'            => strval(time()),

			'IP_ADDRESS'           => $db->escape($_SERVER['REMOTE_ADDR'])

		);

	$sql_parser->assign_vars($vars);

	return true;

}

function stg_deliver_payload()

{

	global $db;

	$schema = stg_load_schema();

	foreach ( $schema as $sql )

	{

		if ( !$db->sql_query($sql) )

		{

			echo $db->get_error();

			return false;

		}

	}

	return true;

}

function stg_write_config()

{

	global $dbhost, $dbuser, $dbpasswd, $dbname, $dbdriver, $dbport;

	$db_data = array(

			'host' => str_replace("'", "\\'", $dbhost),

			'user' => str_replace("'", "\\'", $dbuser),

			'pass' => str_replace("'", "\\'", $dbpasswd),

			'name' => str_replace("'", "\\'", $dbname),

			'port' => intval($dbport),

			'tp' => table_prefix,

			'drv' => $dbdriver

		);

	// Retrieves the existing key

	$site_key = stg_make_private_key();

	// Determine contentPath

	switch ( @$_POST['url_scheme'] )

	{

		case 'standard':

		default:

			$sp_append = '/index.php?title=';

			break;

		case 'shortened':

			$sp_append = '/index.php/';

			break;

		case 'tiny':

			$sp_append = '/?/';

			break;

		case 'rewrite':

			$sp_append = '/';

			break;

	}

	$scriptpath = scriptPath;

	$contentpath = $scriptpath . $sp_append;

	$config_file = <<<EOF

<?php

/**

 * Enano site configuration

 * NOTE ON EDITING: You should almost never need to change anything in this

 * file. The only exceptions are when your DB password/other info is changed

 * or if you are moving your Enano installation to another directory.

 */

//

// DATABASE INFO

//

// Database type to use, currently mysql and postgresql are supported

\$dbdriver = '{$db_data['drv']}';

// Hostname of your database server, probably localhost

\$dbhost = '{$db_data['host']}';

// Port number for database server, probably 3306 (MySQL) or 5432 (PostgreSQL)

\$dbport = '{$db_data['port']}';

// Username used to connect to the database

\$dbuser = '{$db_data['user']}';

// Database password

\$dbpasswd = '{$db_data['pass']}';

// Name of the database

\$dbname = '{$db_data['name']}';

//

// CONSTANTS

//

// if they're already defined, no use re-defining them

if ( !defined('ENANO_CONSTANTS') )

{

	// The prefix for the tables in the database. Useful for holding more than

	// one Enano installation in the same database.

	define('table_prefix', '{$db_data['tp']}');

	// The path to Enano's files on your server, from the document root. If

	// Enano is installed in your document root this will be blank; installing

	// Enano in /enano/ will result in "/enano" here, etc.

	define('scriptPath', '$scriptpath');

	// The authoritative prefix for pages. This should be very literal: to

	// generate a URL on the site, the format is basically

	// contentPath . \$page_name. This is based off of scriptPath and the URL

	// scheme selected during installation. Pattern:

	//

	//    * Standard URLs:  scriptPath . '/index.php?title='

	//    * Shortened URLs: scriptPath . '/index.php/'

	//    * mod_rewrite:    scriptPath . '/'

	define('contentPath', '$contentpath');

	// Tell the Enano API that we're installed and that this file is complete

	define('ENANO_INSTALLED', 'You bet!');

	define('ENANO_CONSTANTS', '');

}

// The AES encryption key used for encrypting various bits of information,

// such as cookies, that should not be editable by users. Read about

// Enano's security model at:

//   http://docs.enanocms.org/Help:Appendix_B

// This key was at one point used for passwords as well, but this is no

// longer true.

\$crypto_key = '$site_key';

EOF;

	// Write config file

	$ch = @fopen ( ENANO_ROOT . '/config.new.php', 'w' );

	if ( !$ch )

		return false;

	fwrite($ch, $config_file);

	fclose($ch);

	// If we are using mod_rewrite, also append any existing .htaccess

	if ( @$_POST['url_scheme'] === 'rewrite' )

	{

		$hh = @fopen ( ENANO_ROOT . '/.htaccess.new', 'w' );

		if ( !$hh )

			return false;

		$hhc = <<<EOF

#

# START ENANO RULES

#

# Enable mod_rewrite

RewriteEngine on

# Required under some aliased setups

RewriteBase {$scriptpath}/

# Don't rewrite if the user requested a real directory or file

RewriteCond %{REQUEST_FILENAME} !-f

RewriteCond %{REQUEST_FILENAME} !-d

# Main rule - short and sweet

RewriteRule (.*) index.php?title=\$1 [L,QSA]

EOF;

		fwrite($hh, $hhc);

		fclose($hh);

	}

	return true;

}

function stg_language_setup()

{

	global $languages, $db;

	global $lang_id;

	$lang_info =& $languages[$lang_id];

	if ( !is_array($lang_info) )

		return false;

	// Install the language

	// ($lang_code, $lang_name_neutral, $lang_name_local, $lang_file = false)

	$result = install_language($lang_id, $lang_info['name_eng'], $lang_info['name'], ENANO_ROOT . "/language/{$lang_info['dir']}/core.json");

	if ( !$result )

		return false;

	$lang_local = new Language($lang_id);

	$lang_local->import( ENANO_ROOT . "/language/{$lang_info['dir']}/user.json" );

	$lang_local->import( ENANO_ROOT . "/language/{$lang_info['dir']}/tools.json" );

	$lang_local->import( ENANO_ROOT . "/language/{$lang_info['dir']}/admin.json" );

	$q = $db->sql_query('SELECT lang_id FROM ' . table_prefix . 'language ORDER BY lang_id DESC LIMIT 1;');

	if ( !$q )

		$db->_die();

	list($lang_id_int) = $db->fetchrow_num();

	$db->free_result();

	setConfig('default_language', $lang_id_int);

	return true;

}

function stg_add_content()

{

	global $db, $session, $paths, $template, $plugins; // Common objects

	global $cache;

	global $languages;

	global $lang_id;

	$lang_info =& $languages[$lang_id];

	if ( !is_array($lang_info) )

		return false;

	if ( $_POST['default_content_type'] === 'tutorial' )

	{

		$dir = ENANO_ROOT . "/language/{$lang_info['dir']}/install/default-tutorial";

	}

	else

	{

		$dir = ENANO_ROOT . "/language/{$lang_info['dir']}/install/default-blank";

	}

	if ( !$dr = @opendir($dir) )

		return false;

	while ( $dh = @readdir($dr) )

	{

		if ( !preg_match('/\.txt$/', $dh) )

			continue;

		$page_contents = @file_get_contents("$dir/$dh");

		if ( empty($page_contents) )

			return false;

		$page_name = preg_replace('/\.txt$/', '', $dh);

		if ( !install_primitive_page_creator($page_name, 'Article', $page_contents) )

			return false;

	}

	closedir($dr);

	$cache->purge('page_meta');

	return true;

}

function install_primitive_page_creator($page_id, $namespace, $content)

{

	global $db, $session, $paths, $template, $plugins; // Common objects

	$page_title = $db->escape(str_replace('_', ' ', dirtify_page_id($page_id)));

	$author = $db->escape($_POST['username']);

	$page_id = $db->escape($page_id);

	$namespace = $db->escape($namespace);

	// yes, we do probably want strip_all_php ON.

	$content = RenderMan::preprocess_text($content, true, true);

	$now = time();

	// query 1: logs

	$q = $db->sql_query('INSERT INTO ' . table_prefix . "logs(time_id, date_string, log_type, action, page_id, namespace, author, page_text) VALUES\n"

										. "  ( $now, 'DEPRECATED', 'page', 'edit', '$page_id', '$namespace', '$author', '$content');");

	if ( !$q )

	{

		echo $db->get_error();

		return false;

	}

	// query 2: page_text

	$q = $db->sql_query('INSERT INTO ' . table_prefix . "page_text(page_id, namespace, page_text) VALUES\n"

										. "  ( '$page_id', '$namespace', '$content');");

	if ( !$q )

	{

		echo $db->get_error();

		return false;

	}

	// query 3: pages

	$q = $db->sql_query('INSERT INTO ' . table_prefix . "pages(page_order, name, urlname, namespace, special, visible, comments_on, protected, delvotes, delvote_ips) VALUES\n"

										. "  (NULL, '$page_title', '$page_id', '$namespace', 0, 1, 1, 1, 0, '');");

	if ( !$q )

	{

		echo $db->get_error();

		return false;

	}

	return true;

}

function stg_init_logs()

{

	global $db, $session, $paths, $template, $plugins; // Common objects

	global $installer_version;

	$q = $db->sql_query('INSERT INTO ' . table_prefix . 'logs(log_type,action,time_id,date_string,author,author_uid,page_text,edit_summary) VALUES(\'security\', \'install_enano\', ' . time() . ', \'' . enano_date(ED_DATE | ED_TIME) . '\', \'' . $db->escape($_POST['username']) . '\', 2, \'' . $db->escape(enano_version()) . '\', \'' . $db->escape($_SERVER['REMOTE_ADDR']) . '\');');

	if ( !$q )

	{

		echo '<p><tt>MySQL return: ' . $db->sql_error() . '</tt></p>';

		return false;

	}

	return true;

}

function stg_aes_cleanup()

{

	global $db, $session, $paths, $template, $plugins; // Common objects

	$q = $db->sql_query('DELETE FROM ' . table_prefix . 'config WHERE config_name = \'install_aes_key\' OR config_name = \'site_aes_key\';');

	if ( !$q )

		$db->_die();

	return true;

}

function _stg_rename_config_revert()

{

	if ( file_exists('./config.php') )

	{

		@rename('./config.php', './config.new.php');

	}

	$handle = @fopen('./config.php.new', 'w');

	if ( !$handle )

		return false;

	$contents = '<?php $cryptkey = \'' . _INSTRESUME_AES_KEYBACKUP . '\'; ?>';

	fwrite($handle, $contents);

	fclose($handle);

	return true;

}

function stg_build_index()

{

	global $db, $session, $paths, $template, $plugins; // Common objects

	if ( $paths->rebuild_search_index() )

		return true;

	return false;

}

function stg_rename_config()

{

	if ( !@rename(ENANO_ROOT . '/config.new.php', ENANO_ROOT . '/config.php') )

	{

		echo '<p>Can\'t rename config.php</p>';

		_stg_rename_config_revert();

		return false;

	}

	if ( @filesize(ENANO_ROOT . '/.htaccess.new') > 1 )

	{

		// rename/possibly concatenate .htaccess.new

		$htaccess_base = '';

		if ( file_exists(ENANO_ROOT . '/.htaccess') )

			$htaccess_base .= @file_get_contents(ENANO_ROOT . '/.htaccess');

		if ( strlen($htaccess_base) > 0 && !preg_match("/\n$/", $htaccess_base) )

			$htaccess_base .= "\n\n";