(PHP 5 >= 5.1.0)
stream_socket_enable_crypto — Turns encryption on/off on an already connected socket
$stream
, bool $enable
[, int $crypto_type
[, resource $session_stream
]] )Enable or disable encryption on the stream.
Once the crypto settings are established, cryptography can be turned
on and off dynamically by passing TRUE or FALSE in the
enable parameter.
stream
The stream resource.
enable
Enable/disable cryptography on the stream.
crypto_type
Setup encryption on the stream. Valid methods are
STREAM_CRYPTO_METHOD_SSLv2_CLIENTSTREAM_CRYPTO_METHOD_SSLv3_CLIENTSTREAM_CRYPTO_METHOD_SSLv23_CLIENTSTREAM_CRYPTO_METHOD_TLS_CLIENTSTREAM_CRYPTO_METHOD_SSLv2_SERVERSTREAM_CRYPTO_METHOD_SSLv3_SERVERSTREAM_CRYPTO_METHOD_SSLv23_SERVERSTREAM_CRYPTO_METHOD_TLS_SERVERsession_stream
Seed the stream with settings from session_stream.
Returns TRUE on success, FALSE if negotiation has failed or
0 if there isn't enough data and you should try again
(only for non-blocking sockets).
Example #1 stream_socket_enable_crypto() example
<?php
$fp = stream_socket_client("tcp://myproto.example.com:31337", $errno, $errstr, 30);
if (!$fp) {
die("Unable to connect: $errstr ($errno)");
}
/* Turn on encryption for login phase */
stream_socket_enable_crypto($fp, true, STREAM_CRYPTO_METHOD_SSLv23_CLIENT);
fwrite($fp, "USER god\r\n");
fwrite($fp, "PASS secret\r\n");
/* Turn off encryption for the rest */
stream_socket_enable_crypto($fp, false);
while ($motd = fgets($fp)) {
echo $motd;
}
fclose($fp);
?>
以上例程的输出类似于：
mark at kinoko dot fr (2007-11-06 11:00:10)
Just to avoid letting you search everywhere why your code doesn't work when using this function to enable crypto as a server, and when using TLS, you have to put the certificate in the "ssl" context, even if you start a TLS, SSLv3, etc.. server.
I had some troubles because of that...
tigger (AT) tiggerswelt d0t net (2007-05-30 03:15:55)
As already mentioned above:
stream_socket_enable_crypto is likely to fail/return zero if the socket is in non-blocking mode.
You may either wait some seconds until all neccessary data has arrived or switch temporary to blocking mode:
<?PHP
stream_set_blocking ($fd, true);
stream_socket_enable_crypto ($fd, true, STREAM_CRYPTO_METHOD_TLS_CLIENT);
stream_set_blocking ($fd, false);
?>
This works very fine for me ;-)