<?php

/*
Copyright (c) 2007, Till Brehm, projektfarm Gmbh
All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
    * Neither the name of ISPConfig nor the names of its contributors
      may be used to endorse or promote products derived from this software without
      specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

class installer extends installer_base {

	public function configure_dovecot()
	{
		global $conf;

		$virtual_transport = 'dovecot';

		$configure_lmtp = false;

		// use lmtp if installed
		if($configure_lmtp = (is_file('/usr/lib/dovecot/lmtp') || is_file('/usr/libexec/dovecot/lmtp'))) {
			$virtual_transport = 'lmtp:unix:private/dovecot-lmtp';
		}

		// check if virtual_transport must be changed
		if ($this->is_update) {
			$tmp = $this->db->queryOneRecord("SELECT * FROM ?? WHERE server_id = ?", $conf["mysql"]["database"] . ".server", $conf['server_id']);
			$ini_array = ini_to_array(stripslashes($tmp['config']));
			// ini_array needs not to be checked, because already done in update.php -> updateDbAndIni()

			if(isset($ini_array['mail']['mailbox_virtual_uidgid_maps']) && $ini_array['mail']['mailbox_virtual_uidgid_maps'] == 'y') {
				$virtual_transport = 'lmtp:unix:private/dovecot-lmtp';
				$configure_lmtp = true;
			}
		}

		$config_dir = $conf['postfix']['config_dir'];
		if(!$this->get_postfix_service('dovecot', 'unix')) {
			//* backup
			if(is_file($config_dir.'/master.cf')){
				copy($config_dir.'/master.cf', $config_dir.'/master.cf~2');
			}
			if(is_file($config_dir.'/master.cf~')){
				chmod($config_dir.'/master.cf~2', 0400);
			}
			//* Configure master.cf and add a line for deliver
			$content = rf($conf["postfix"]["config_dir"].'/master.cf');
			$deliver_content = 'dovecot   unix  -       n       n       -       -       pipe'."\n".'  flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -f ${sender} -d ${user}@${nexthop}'."\n";
			af($config_dir.'/master.cf', $deliver_content);
			unset($content);
			unset($deliver_content);
		}

		//* Reconfigure postfix to use dovecot authentication
		$postconf_commands = array (
			'dovecot_destination_recipient_limit = 1',
			'virtual_transport = '.$virtual_transport,
			'smtpd_sasl_type = dovecot',
			'smtpd_sasl_path = private/auth'
		);

		// Make a backup copy of the main.cf file
		copy($conf["postfix"]["config_dir"].'/main.cf', $conf["postfix"]["config_dir"].'/main.cf~3');

		// Executing the postconf commands
		foreach($postconf_commands as $cmd) {
			$command = "postconf -e '$cmd'";
			caselog($command." &> /dev/null", __FILE__, __LINE__, "EXECUTED: $command", "Failed to execute the command $command");
		}

		//* copy dovecot.conf
		$config_dir = $conf['dovecot']['config_dir'];
		$configfile = 'dovecot.conf';
		if(is_file($config_dir.'/'.$configfile)){
			copy($config_dir.'/'.$configfile, $config_dir.'/'.$configfile.'~');
		}

		//* Get the dovecot version
		exec('dovecot --version', $tmp);
		$dovecot_version = $tmp[0];
		unset($tmp);

		//* Copy dovecot configuration file
		if(version_compare($dovecot_version,2) >= 0) {
			if(is_file($conf['ispconfig_install_dir'].'/server/conf-custom/install/debian6_dovecot2.conf.master')) {
				copy($conf['ispconfig_install_dir'].'/server/conf-custom/install/debian6_dovecot2.conf.master', $config_dir.'/'.$configfile);
			} else {
				copy('tpl/debian6_dovecot2.conf.master', $config_dir.'/'.$configfile);
			}
			// Copy custom config file
			if(is_file($conf['ispconfig_install_dir'].'/server/conf-custom/install/dovecot_custom.conf.master')) {
				copy($conf['ispconfig_install_dir'].'/server/conf-custom/install/dovecot_custom.conf.master', $config_dir.'/conf.d/99-ispconfig-custom-config.conf');
			}
			replaceLine($config_dir.'/'.$configfile, 'postmaster_address = postmaster@example.com', 'postmaster_address = postmaster@'.$conf['hostname'], 1, 0);
			replaceLine($config_dir.'/'.$configfile, 'postmaster_address = webmaster@localhost', 'postmaster_address = postmaster@'.$conf['hostname'], 1, 0);
			if(version_compare($dovecot_version,2.1) < 0) {
				removeLine($config_dir.'/'.$configfile, 'ssl_protocols =');
			}
			if(version_compare($dovecot_version,2.2) >= 0) {
				// Dovecot > 2.2 does not recognize !SSLv2 anymore on Debian 9
				$content = file_get_contents($config_dir.'/'.$configfile);
				$content = str_replace('!SSLv2','',$content);
				file_put_contents($config_dir.'/'.$configfile,$content);
				unset($content);
			}
			if(version_compare($dovecot_version,2.3) >= 0) {
				// Remove deprecated setting(s)
				removeLine($config_dir.'/'.$configfile, 'ssl_protocols =');

				// Check if we have a dhparams file and if not, create it
				if(!file_exists('/etc/dovecot/dh.pem')) {
					swriteln('Creating new DHParams file, this takes several minutes. Do not interrupt the script.');
					if(file_exists('/var/lib/dovecot/ssl-parameters.dat')) {
						// convert existing ssl parameters file
						$command = 'dd if=/var/lib/dovecot/ssl-parameters.dat bs=1 skip=88 | openssl dhparam -inform der > /etc/dovecot/dh.pem';
						caselog($command.' &> /dev/null', __FILE__, __LINE__, "EXECUTED: $command", "Failed to execute the command $command");
					} else {
						/*
						   Create a new dhparams file. We use 2048 bit only as it simply takes too long
						   on smaller systems to generate a 4096 bit dh file (> 30 minutes). If you need
						   a 4096 bit file, create it manually before you install ISPConfig
						*/
						$command = 'openssl dhparam -out /etc/dovecot/dh.pem 2048';
						caselog($command.' &> /dev/null', __FILE__, __LINE__, "EXECUTED: $command", "Failed to execute the command $command");
					}
				}
				//remove #2.3+ comment
				$content = file_get_contents($config_dir.'/'.$configfile);
				$content = str_replace('#2.3+ ','',$content);
				file_put_contents($config_dir.'/'.$configfile,$content);
				unset($content);

			} else {
				// remove settings which are not supported in Dovecot < 2.3
				removeLine($config_dir.'/'.$configfile, 'ssl_min_protocol =');
				removeLine($config_dir.'/'.$configfile, 'ssl_dh =');
			}
		} else {
			if(is_file($conf['ispconfig_install_dir'].'/server/conf-custom/install/debian6_dovecot.conf.master')) {
				copy($conf['ispconfig_install_dir'].'/server/conf-custom/install/debian6_dovecot.conf.master', $config_dir.'/'.$configfile);
			} else {
				copy('tpl/debian6_dovecot.conf.master', $config_dir.'/'.$configfile);
			}
		}

		$dovecot_protocols = 'imap pop3';

		//* dovecot-lmtpd
		if($configure_lmtp) {
			$dovecot_protocols .= ' lmtp';
		}

		//* dovecot-managesieved
		if(is_file('/usr/lib/dovecot/managesieve') || is_file('/usr/libexec/dovecot/managesieve')) {
			$dovecot_protocols .= ' sieve';
		}

		replaceLine($config_dir.'/'.$configfile, 'protocols = imap pop3', "protocols = $dovecot_protocols", 1, 0);

		//* dovecot-sql.conf
		$configfile = 'dovecot-sql.conf';
		if(is_file($config_dir.'/'.$configfile)){
			copy($config_dir.'/'.$configfile, $config_dir.'/'.$configfile.'~');
			chmod($config_dir.'/'.$configfile.'~', 0400);
		}
		$content = rfsel($conf['ispconfig_install_dir'].'/server/conf-custom/install/debian6_dovecot-sql.conf.master', 'tpl/debian6_dovecot-sql.conf.master');
		$content = str_replace('{mysql_server_ispconfig_user}', $conf['mysql']['ispconfig_user'], $content);
		$content = str_replace('{mysql_server_ispconfig_password}', $conf['mysql']['ispconfig_password'], $content);
		$content = str_replace('{mysql_server_database}', $conf['mysql']['database'], $content);
		$content = str_replace('{mysql_server_host}', $conf['mysql']['host'], $content);
		$content = str_replace('{mysql_server_port}', $conf['mysql']['port'], $content);
		$content = str_replace('{server_id}', $conf['server_id'], $content);
		# enable iterate_query for dovecot2
		if(version_compare($dovecot_version,2, '>=')) {
			$content = str_replace('# iterate_query', 'iterate_query', $content);
		}
		wf($config_dir.'/'.$configfile, $content);

		chmod($config_dir.'/'.$configfile, 0600);
		chown($config_dir.'/'.$configfile, 'root');
		chgrp($config_dir.'/'.$configfile, 'root');

		// Dovecot shall ignore mounts in website directory
		if(is_installed('doveadm')) exec("doveadm mount add '/var/www/*' ignore > /dev/null 2> /dev/null");

	}

	public function configure_apache() {
		global $conf;

		if(file_exists('/etc/apache2/mods-available/fcgid.conf')) replaceLine('/etc/apache2/mods-available/fcgid.conf', 'MaxRequestLen', 'MaxRequestLen 15728640', 0, 1);

		parent::configure_apache();
	}

	public function configure_fail2ban() {
		/*
        copy('tpl/dovecot-pop3imap.conf.master',"/etc/fail2ban/filter.d/dovecot-pop3imap.conf");
        copy('tpl/dovecot_fail2ban_jail.local.master','/etc/fail2ban/jail.local');
	*/
	}

}

?>