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    EventBufferEvent::sslFilter

    (PECL event >= 1.2.6-beta)

    EventBufferEvent::sslFilter — Create a new SSL buffer event to send its data over another buffer event

    説明

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

    Create a new SSL buffer event to send its data over another buffer event

    注意:

    This function is available only if Event is compiled with OpenSSL support.

    パラメータ

    base

    Associated event base.

    underlying

    A socket buffer event to use for this SSL.

    ctx

    Object of EventSslContext class.

    state

    The current state of SSL connection: EventBufferEvent::SSL_OPEN , EventBufferEvent::SSL_ACCEPTING or EventBufferEvent::SSL_CONNECTING .

    options

    One or more buffer event options.

    戻り値

    Returns a new SSL EventBufferEvent object.

    例

    例1 Simple SMTP server

    <?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();

    参考

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