EventBufferEvent::sslFilter

public static EventBufferEvent EventBufferEvent::sslFilter (  EventBase $base  ,  EventBufferEvent $underlying  ,  EventSslContext $ctx  ,  int $state  [,  int $options  = 0  ] )

<?php
 /*
 * Author: Andrew Rose <hello at andrewrose dot co dot uk>
 *
 * Usage:
 * 1) Prepare cert.pem certificate and privkey.pem private key files.
 * 2) Launch the server script
 * 3) Open TLS connection, e.g.:
 *      $ openssl s_client -connect localhost:25 -starttls smtp -crlf
 * 4) Start testing the commands listed in `cmd` method below.
 */

class Handler {
    public $domainName = FALSE;
    public $connections = [];
    public $buffers = [];
    public $maxRead = 256000;

    public function __construct() {
        $this->ctx = new EventSslContext(EventSslContext::SSLv3_SERVER_METHOD, [
            EventSslContext::OPT_LOCAL_CERT  => 'cert.pem',
            EventSslContext::OPT_LOCAL_PK    => 'privkey.pem',
            //EventSslContext::OPT_PASSPHRASE  => '',
            EventSslContext::OPT_VERIFY_PEER => false, // change to true with authentic cert
            EventSslContext::OPT_ALLOW_SELF_SIGNED => true // change to false with authentic cert
        ]

        $this->base = new EventBase(
        if (!$this->base) {
            exit("Couldn't open event base\n"
        }

        if (!$this->listener = new EventListener($this->base,
            [$this, 'ev_accept'],
            $this->ctx,
            EventListener::OPT_CLOSE_ON_FREE | EventListener::OPT_REUSEABLE,
            -1,
            '0.0.0.0:25'))
        {
            exit("Couldn't create listener\n"
        }

        $this->listener->setErrorCallback([$this, 'ev_error']
        $this->base->dispatch(
    }

    public function ev_accept($listener, $fd, $address, $ctx) {
        static $id = 0;
        $id += 1;

        $this->connections[$id]['clientData'] = '';
        $this->connections[$id]['cnx'] = new EventBufferEvent($this->base, $fd,
            EventBufferEvent::OPT_CLOSE_ON_FREE

        if (!$this->connections[$id]['cnx']) {
            echo "Failed creating buffer\n";
            $this->base->exit(NULL
            exit(1
        }

        $this->connections[$id]['cnx']->setCallbacks([$this, "ev_read"], NULL,
            [$this, 'ev_error'], $id
        $this->connections[$id]['cnx']->enable(Event::READ | Event::WRITE

        $this->ev_write($id, '220 '.$this->domainName." wazzzap?\r\n"
    }

    function ev_error($listener, $ctx) {
        $errno = EventUtil::getLastSocketErrno(

        fprintf(STDERR, "Got an error %d (%s) on the listener. Shutting down.\n",
            $errno, EventUtil::getLastSocketError()

        if ($errno != 0) {
            $this->base->exit(NULL
            exit(
        }
    }

    public function ev_close($id) {
        $this->connections[$id]['cnx']->disable(Event::READ | Event::WRITE
        unset($this->connections[$id]
    }

    protected function ev_write($id, $string) {
        echo 'S('.$id.'): '.$string;
        $this->connections[$id]['cnx']->write($string
    }

    public function ev_read($buffer, $id) {
        while($buffer->input->length > 0) {
            $this->connections[$id]['clientData'] .= $buffer->input->read($this->maxRead
            $clientDataLen = strlen($this->connections[$id]['clientData']

            if($this->connections[$id]['clientData'][$clientDataLen-1] == "\n"
                && $this->connections[$id]['clientData'][$clientDataLen-2] == "\r")
            {
                // remove the trailing \r\n
                $line = substr($this->connections[$id]['clientData'], 0,
                    strlen($this->connections[$id]['clientData']) - 2

                $this->connections[$id]['clientData'] = '';
                $this->cmd($buffer, $id, $line
            }
        }
    }

    protected function cmd($buffer, $id, $line) {
        switch ($line) {
            case strncmp('EHLO ', $line, 4):
                $this->ev_write($id, "250-STARTTLS\r\n"
                $this->ev_write($id, "250 OK ehlo\r\n"
                break;

            case strncmp('HELO ', $line, 4):
                $this->ev_write($id, "250-STARTTLS\r\n"
                $this->ev_write($id, "250 OK helo\r\n"
                break;

            case strncmp('QUIT', $line, 3):
                $this->ev_write($id, "250 OK quit\r\n"
                $this->ev_close($id
                break;

            case strncmp('STARTTLS', $line, 3):
                $this->ev_write($id, "220 Ready to start TLS\r\n"
                $this->connections[$id]['cnx'] = EventBufferEvent::sslFilter($this->base,
                    $this->connections[$id]['cnx'], $this->ctx,
                    EventBufferEvent::SSL_ACCEPTING,
                    EventBufferEvent::OPT_CLOSE_ON_FREE
                $this->connections[$id]['cnx']->setCallbacks([$this, "ev_read"], NULL, [$this, 'ev_error'], $id
                $this->connections[$id]['cnx']->enable(Event::READ | Event::WRITE
                break;

            default:
                echo 'unknown command: '.$line."\n";
                break;
        }
    }
}

new Handler(