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<?php
/**
* Info about the local environment, wrt RPC
*
* This should really be a singleton. A PHP5 Todo I guess.
*/
class mnet_environment {
var $id = 0;
var $wwwroot = '';
var $ip_address = '';
var $public_key = '';
var $public_key_expires = 0;
var $last_connect_time = 0;
var $last_log_id = 0;
var $keypair = array();
var $deleted = 0;
function mnet_environment() {
return true;
}
function init() {
global $CFG, $DB;
// Bootstrap the object data on first load.
if (!$hostobject = $DB->get_record('mnet_host', array('id'=>$CFG->mnet_localhost_id))) {
return false;
}
$temparr = get_object_vars($hostobject);
foreach($temparr as $key => $value) {
$this->$key = $value;
}
unset($hostobject, $temparr);
// Unless this is an install/upgrade, generate the SSL keys.
if (empty($this->public_key)) {
$this->get_keypair();
}
// We need to set up a record that represents 'all hosts'. Any rights
// granted to this host will be conferred on all hosts.
if (empty($CFG->mnet_all_hosts_id) ) {
$hostobject = new stdClass();
$hostobject->wwwroot = '';
$hostobject->ip_address = '';
$hostobject->public_key = '';
$hostobject->public_key_expires = 0;
$hostobject->last_connect_time = 0;
$hostobject->last_log_id = 0;
$hostobject->deleted = 0;
$hostobject->name = 'All Hosts';
$hostobject->id = $DB->insert_record('mnet_host',$hostobject);
set_config('mnet_all_hosts_id', $hostobject->id);
$CFG->mnet_all_hosts_id = $hostobject->id;
unset($hostobject);
}
}
function get_keypair() {
global $DB, $CFG;
// We don't generate keys on install/upgrade because we want the USER
// record to have an email address, city and country already.
if (during_initial_install()) return true;
if ($CFG->mnet_dispatcher_mode == 'off') return true;
if (!extension_loaded("openssl")) return true;
if (!empty($this->keypair)) return true;
$this->keypair = array();
$keypair = get_config('mnet', 'openssl');
if (!empty($keypair)) {
// Explode/Implode is faster than Unserialize/Serialize
list($this->keypair['certificate'], $this->keypair['keypair_PEM']) = explode('@@@@@@@@', $keypair);
}
if ($this->public_key_expires > time()) {
$this->keypair['privatekey'] = openssl_pkey_get_private($this->keypair['keypair_PEM']);
$this->keypair['publickey'] = openssl_pkey_get_public($this->keypair['certificate']);
} else {
// Key generation/rotation
// 1. Archive the current key (if there is one).
$result = get_config('mnet', 'openssl_history');
if(empty($result)) {
set_config('openssl_history', serialize(array()), 'mnet');
$openssl_history = array();
} else {
$openssl_history = unserialize($result);
}
if(count($this->keypair)) {
$this->keypair['expires'] = $this->public_key_expires;
array_unshift($openssl_history, $this->keypair);
}
// 2. How many old keys do we want to keep? Use array_slice to get
// rid of any we don't want
$openssl_generations = get_config('mnet', 'openssl_generations');
if(empty($openssl_generations)) {
set_config('openssl_generations', 3, 'mnet');
$openssl_generations = 3;
}
if(count($openssl_history) > $openssl_generations) {
$openssl_history = array_slice($openssl_history, 0, $openssl_generations);
}
set_config('openssl_history', serialize($openssl_history), 'mnet');
// 3. Generate fresh keys
$this->replace_keys();
}
return true;
}
function replace_keys() {
global $DB, $CFG;
$keypair = mnet_generate_keypair();
if (empty($keypair)) {
error_log('Can not generate keypair, sorry');
return;
}
$this->keypair = array();
$this->keypair = $keypair;
$this->public_key = $this->keypair['certificate'];
$details = openssl_x509_parse($this->public_key);
$this->public_key_expires = $details['validTo_time_t'];
$this->wwwroot = $CFG->wwwroot;
if (empty($_SERVER['SERVER_ADDR'])) {
// SERVER_ADDR is only returned by Apache-like webservers
$my_hostname = mnet_get_hostname_from_uri($CFG->wwwroot);
$my_ip = gethostbyname($my_hostname); // Returns unmodified hostname on failure. DOH!
if ($my_ip == $my_hostname) {
$this->ip_address = 'UNKNOWN';
} else {
$this->ip_address = $my_ip;
}
} else {
$this->ip_address = $_SERVER['SERVER_ADDR'];
}
set_config('openssl', implode('@@@@@@@@', $this->keypair), 'mnet');
$DB->update_record('mnet_host', $this);
error_log('New public key has been generated. It expires ' . date('Y/m/d h:i:s', $this->public_key_expires));
}
function get_private_key() {
if (empty($this->keypair)) $this->get_keypair();
if (isset($this->keypair['privatekey'])) return $this->keypair['privatekey'];
$this->keypair['privatekey'] = openssl_pkey_get_private($this->keypair['keypair_PEM']);
return $this->keypair['privatekey'];
}
function get_public_key() {
if (!isset($this->keypair)) $this->get_keypair();
if (isset($this->keypair['publickey'])) return $this->keypair['publickey'];
$this->keypair['publickey'] = openssl_pkey_get_public($this->keypair['certificate']);
return $this->keypair['publickey'];
}
}
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