From c930a0f799b9016a2938679ff0795e85ca18a88c Mon Sep 17 00:00:00 2001
From: Dominik <info@profi-webdesign.net>
Date: Mon, 27 Jan 2014 14:50:53 -0500
Subject: [PATCH] and again
---
server/plugins-available/mail_plugin_dkim.inc.php | 330 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 330 insertions(+), 0 deletions(-)
diff --git a/server/plugins-available/mail_plugin_dkim.inc.php b/server/plugins-available/mail_plugin_dkim.inc.php
new file mode 100644
index 0000000..325dc0b
--- /dev/null
+++ b/server/plugins-available/mail_plugin_dkim.inc.php
@@ -0,0 +1,330 @@
+<?php
+
+/**
+ Copyright (c) 2007 - 2013, Till Brehm, projektfarm Gmbh
+ Copyright (c) 2013, Florian Schaal, info@schaal-24.de
+ 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.
+
+ @author Florian Schaal, info@schaal-24.de
+ @copyrighth Florian Schaal, info@schaal-24.de
+ */
+
+
+class mail_plugin_dkim {
+
+ var $plugin_name = 'mail_plugin_dkim';
+ var $class_name = 'mail_plugin_dkim';
+
+ // private variables
+ var $action = '';
+
+ /**
+ * This function is called during ispconfig installation to determine
+ * if a symlink shall be created for this plugin.
+ */
+ function onInstall() {
+ global $conf;
+
+ if($conf['services']['mail'] == true) {
+ return true;
+ } else {
+ return false;
+ }
+
+ }
+
+ /**
+ * This function is called when the plugin is loaded
+ */
+ function onLoad() {
+ global $app, $conf;
+ /*
+ Register for the events
+ */
+ $app->plugins->registerEvent('mail_domain_delete', $this->plugin_name, 'domain_dkim_delete');
+ $app->plugins->registerEvent('mail_domain_insert', $this->plugin_name, 'domain_dkim_insert');
+ $app->plugins->registerEvent('mail_domain_update', $this->plugin_name, 'domain_dkim_update');
+ }
+
+ /**
+ * This function gets the amavisd-config file
+ * @return string path to the amavisd-config for dkim-keys
+ */
+ function get_amavis_config() {
+ $pos_config=array(
+ '/etc/amavisd.conf',
+ '/etc/amavisd.conf/50-user',
+ '/etc/amavis/conf.d/50-user',
+ '/etc/amavisd/amavisd.conf'
+ );
+ $amavis_configfile='';
+ foreach($pos_config as $conf) {
+ if (is_file($conf)) {
+ $amavis_configfile=$conf;
+ break;
+ }
+ }
+ return $amavis_configfile;
+ }
+
+ /**
+ * This function checks the relevant configs and disables dkim for the domain
+ * if the directory for dkim is not writeable or does not exist
+ * @param array $data mail-settings
+ * @return boolean - true when the amavis-config and the dkim-dir are writeable
+ */
+ function check_system($data) {
+ global $app, $mail_config;
+ $app->uses('getconf');
+ $check=true;
+ /* check for amavis-config */
+ if ( $this->get_amavis_config() == '' || !is_writeable($this->get_amavis_config()) ) {
+ $app->log('Amavis-config not found or not writeable.', LOGLEVEL_ERROR);
+ $check=false;
+ }
+ /* dir for dkim-keys writeable? */
+ $mail_config = $app->getconf->get_server_config($conf['server_id'], 'mail');
+ if (isset($mail_config['dkim_path']) && isset($data['new']['dkim_private']) && !empty($data['new']['dkim_private'])) {
+ if (!is_writeable($mail_config['dkim_path'])) {
+ $app->log('DKIM Path '.$mail_config['dkim_path'].' not found or not writeable.', LOGLEVEL_ERROR);
+ $check=false;
+ }
+ } else {
+ $app->log('Unable to write DKIM settings; Check your config!', LOGLEVEL_ERROR);
+ $check=false;
+ }
+ return $check;
+ }
+
+ /**
+ * This function restarts amavis
+ */
+ function restart_amavis() {
+ global $app, $conf;
+ $pos_init=array(
+ $conf['init_scripts'].'/amavis',
+ $conf['init_scripts'].'/amavisd'
+ );
+ $initfile='';
+ foreach($pos_init as $init) {
+ if (is_executable($init)) {
+ $initfile=$init;
+ break;
+ }
+ }
+ $app->log('Restarting amavis: '.$initfile.'.', LOGLEVEL_DEBUG);
+ exec(escapeshellarg($initfile).' restart', $output);
+ foreach($output as $logline) $app->log($logline, LOGLEVEL_DEBUG);
+ }
+
+ /**
+ * This function writes the keyfiles (public and private)
+ * @param string $key_file full path to the key-file
+ * @param string $key_value private-key
+ * @param string $key_domain mail-domain
+ * @return bool - true when the key is written to disk
+ */
+ function write_dkim_key($key_file, $key_value, $key_domain) {
+ global $app, $mailconfig;
+ $success=false;
+ if (!file_put_contents($key_file.'.private', $key_value) === false) {
+ $app->log('Saved DKIM Private-key to '.$key_file.'.private', LOGLEVEL_DEBUG);
+ $success=true;
+ /* now we get the DKIM Public-key */
+ exec('cat '.escapeshellarg($key_file.'.private').'|openssl rsa -pubout', $pubkey, $result);
+ $public_key='';
+ foreach($pubkey as $values) $public_key=$public_key.$values."\n";
+ /* save the DKIM Public-key in dkim-dir */
+ if (!file_put_contents($key_file.'.public', $public_key) === false)
+ $app->log('Saved DKIM Public to '.$key_domain.'.', LOGLEVEL_DEBUG);
+ else $app->log('Unable to save DKIM Public to '.$key_domain.'.', LOGLEVEL_WARNING);
+ }
+ return $success;
+ }
+
+ /**
+ * This function removes the keyfiles
+ * @param string $key_file full path to the key-file
+ * @param string $key_domain mail-domain
+ */
+ function remove_dkim_key($key_file, $key_domain) {
+ global $app;
+ if (file_exists($key_file.'.private')) {
+ exec('rm -f '.escapeshellarg($key_file.'.private'));
+ $app->log('Deleted the DKIM Private-key for '.$key_domain.'.', LOGLEVEL_DEBUG);
+ } else $app->log('Unable to delete the DKIM Private-key for '.$key_domain.' (not found).', LOGLEVEL_DEBUG);
+ if (file_exists($key_file.'.public')) {
+ exec('rm -f '.escapeshellarg($key_file.'.public'));
+ $app->log('Deleted the DKIM Public-key for '.$key_domain.'.', LOGLEVEL_DEBUG);
+ } else $app->log('Unable to delete the DKIM Public-key for '.$key_domain.' (not found).', LOGLEVEL_DEBUG);
+ }
+
+ /**
+ * This function adds the entry to the amavisd-config
+ * @param string $key_domain mail-domain
+ */
+ function add_to_amavis($key_domain) {
+ global $app, $mail_config;
+ $amavis_config = file_get_contents($this->get_amavis_config());
+ $key_value="dkim_key('".$key_domain."', 'default', '".$mail_config['dkim_path']."/".$key_domain.".private');\n";
+ if(strpos($amavis_config, $key_value) === false) {
+ $amavis_config = str_replace($key_value, '', $amavis_config);
+ if (!file_put_contents($this->get_amavis_config(), $key_value, FILE_APPEND) === false) {
+ $app->log('Adding DKIM Private-key to amavis-config.', LOGLEVEL_DEBUG);
+ $this->restart_amavis();
+ }
+ } else {
+ $app->log('DKIM Private-key already in amavis-config.',LOGLEVEL_DEBUG);
+ }
+ }
+
+ /**
+ * This function removes the entry from the amavisd-config
+ * @param string $key_domain mail-domain
+ */
+ function remove_from_amavis($key_domain) {
+ global $app;
+ $amavis_config = file($this->get_amavis_config());
+ $i=0;$found=false;
+ foreach($amavis_config as $line) {
+ if (preg_match("/^\bdkim_key\b.*\b".$key_domain."\b/", $line)) {
+ unset($amavis_config[$i]);
+ $found=true;
+ }
+ $i++;
+ }
+ if ($found) {
+ file_put_contents($this->get_amavis_config(), $amavis_config);
+ $app->log('Deleted the DKIM settings from amavis-config for '.$key_domain.'.', LOGLEVEL_DEBUG);
+ $this->restart_amavis();
+ } else $app->log('Unable to delete the DKIM settings from amavis-config for '.$key_domain.'.', LOGLEVEL_ERROR);
+ }
+
+ /**
+ * This function controlls new key-files and amavisd-entries
+ * @param array $data mail-settings
+ */
+ function add_dkim($data) {
+ global $app;
+ if ($data['new']['active'] == 'y') {
+ $mail_config = $app->getconf->get_server_config($conf['server_id'], 'mail');
+ if ( substr($mail_config['dkim_path'], strlen($mail_config['dkim_path'])-1) == '/' )
+ $mail_config['dkim_path'] = substr($mail_config['dkim_path'], 0, strlen($mail_config['dkim_path'])-1);
+ if ($this->write_dkim_key($mail_config['dkim_path']."/".$data['new']['domain'], $data['new']['dkim_private'], $data['new']['domain'])) {
+ $this->add_to_amavis($data['new']['domain']);
+ } else {
+ $app->log('Error saving the DKIM Private-key for '.$data['new']['domain'].' - DKIM is not enabled for the domain.', LOGLEVEL_ERROR);
+ }
+ }
+ else {
+ $app->log('DKIM for '.$data['new']['domain'].' not written to disk - domain is inactive', LOGLEVEL_DEBUG);
+ }
+ }
+
+ /**
+ * This function controlls the removement of keyfiles (public and private)
+ * and the entry in the amavisd-config
+ * @param array $data mail-settings
+ */
+ function remove_dkim($_data) {
+ global $app;
+ $mail_config = $app->getconf->get_server_config($conf['server_id'], 'mail');
+ if ( substr($mail_config['dkim_path'], strlen($mail_config['dkim_path'])-1) == '/' )
+ $mail_config['dkim_path'] = substr($mail_config['dkim_path'], 0, strlen($mail_config['dkim_path'])-1);
+ $this->remove_dkim_key($mail_config['dkim_path']."/".$_data['domain'], $_data['domain']);
+ $this->remove_from_amavis($_data['domain']);
+ }
+
+ /**
+ * Function called by onLoad
+ * deletes dkim-keys
+ */
+ function domain_dkim_delete($event_name, $data) {
+ if (isset($data['old']['dkim']) && $data['old']['dkim'] == 'y' && $data['old']['active'] == 'y') $this->remove_dkim($data['old']);
+ }
+
+ /**
+ * Function called by onLoad
+ * insert dkim-keys
+ */
+ function domain_dkim_insert($event_name, $data) {
+ if (isset($data['new']['dkim']) && $data['new']['dkim']=='y' && $this->check_system($data)) {
+ $this->add_dkim($data);
+ }
+ }
+
+ /**
+ * Function called by onLoad
+ * chang dkim-settings
+ */
+ function domain_dkim_update($event_name, $data) {
+ global $app;
+ if ($this->check_system($data)) {
+ /* maildomain disabled */
+ if ($data['new']['active'] == 'n' && $data['old']['active'] == 'y') {
+ $app->log('Maildomain '.$data['new']['domain'].' disabled - remove DKIM-settings', LOGLEVEL_DEBUG);
+ if ($data['new']['dkim']=='y') {
+ $this->remove_dkim($data['new']);
+ }
+ if ($data['old']['dkim']=='y') {
+ $this->remove_dkim($data['old']);
+ }
+ }
+
+ /* maildomain re-enabled */
+ if ($data['new']['active'] == 'y' && $data['old']['active'] == 'n') {
+ if ($data['new']['dkim']=='y') {
+ $this->add_dkim($data);
+ }
+ }
+
+ /* maildomain active - only dkim changes */
+ if ($data['new']['active'] == 'y' && $data['old']['active'] == 'y') {
+ /* dkim disabled */
+ if ($data['new']['dkim'] != $data['old']['dkim'] && $data['new']['dkim'] == 'n') {
+ $this->remove_dkim($data['new']);
+ }
+ /* dkim enabled */
+ elseif ($data['new']['dkim'] != $data['old']['dkim'] && $data['new']['dkim'] == 'y') {
+ $this->add_dkim($data);
+ }
+ /* new private-key or new domain-name */
+ if ($data['new']['dkim_private'] != $data['old']['dkim_private'] || $data['new']['domain'] != $data['old']['domain']) {
+ $this->remove_dkim($data['old']);
+ $this->add_dkim($data);
+ }
+ }
+
+ /* resync */
+ if ($data['new']['active'] == 'y' && $data['new'] == $data['old']) {
+ $this->add_dkim($data);
+ }
+ }
+ }
+
+}
+
+?>
--
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