Stream socket with SSL

Question

I have a problem with stream socket and SSL in PHP 5.6. It seems that SSL is buffering output. In the example below "ehlo" command is ignored (server is not responding). But when something else is sent after "ehlo" e.g. a new line in another call to fwrite, server sends response.

$errno = ''; $errstr = ''; $timeout = 5; $streamContext = stream_context_create(); $host = 'ssl://smtp.some.server.com:465'; $stream = stream_socket_client($host, $errno, $errstr, $timeout, STREAM_CLIENT_CONNECT, $streamContext); stream_set_blocking($stream, 1); stream_set_timeout($stream, $timeout); stream_set_write_buffer($stream, 0);  $fgets = fgets($stream); print_r($fgets);  fwrite($stream, "ehlo [127.0.0.1]\r\n");  $response = ''; do {     $line = fgets($stream);     $response .= $line; } while (null !== $line && false !== $line && ' ' != $line{3});  print_r($response);  fclose($stream); 

I've got a response:

220 epicserver.net.pl ESMTP IdeaSmtpServer v0.80.2 ready.

(it's from first print_r).

But when after line: fwrite($stream, "ehlo [127.0.0.1]\r\n"); I add additional socket write: fwrite($stream, "\n"); output is ok:

220 epicserver.net.pl ESMTP IdeaSmtpServer v0.80.2 ready. 250-epicserver.net.pl Hello ip-166-242.pl [94.183.162.232], pleased to meet you 250-PIPELINING 250-ENHANCEDSTATUSCODES 250-SIZE 250-8BITMIME 250-AUTH PLAIN LOGIN 250-AUTH=PLAIN LOGIN 250 HELP 

I've tried using stunnel to check if it's a PHP SSL wrapper issue and when I change $host to $host = 'localhost:110;' (my stunnel configuration) everything works perfectly (without adding that special fwrite method).

Did anyone face that problem?

Answer 1

Replace 1st fgets with this code, to be sure fgets understand line termination correctly:

$fgets = ''; while (is_resource($stream) && !feof($stream)) {   $fgets .= fgets($stream);  }