Description
mixed
stream_socket_enable_crypto ( resource stream, bool enable [, int crypto_type [, resource session_stream]] )
When called with the crypto_type parameter,
stream_socket_enable_crypto() will setup
encryption on the stream using the specified method.
Valid values for crypto_type
STREAM_CRYPTO_METHOD_SSLv2_CLIENT
STREAM_CRYPTO_METHOD_SSLv3_CLIENT
STREAM_CRYPTO_METHOD_SSLv23_CLIENT
STREAM_CRYPTO_METHOD_TLS_CLIENT
STREAM_CRYPTO_METHOD_SSLv2_SERVER
STREAM_CRYPTO_METHOD_SSLv3_SERVER
STREAM_CRYPTO_METHOD_SSLv23_SERVER
STREAM_CRYPTO_METHOD_TLS_SERVER
Once the crypto settings are established, cryptography can be turned
on and off dynamically by passing TRUE or FALSE in the
enable parameter.
If this stream should be seeded with settings from an already established
crypto enabled stream, pass that stream's resource variable
in the fourth parameter.
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);
?>
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Reference CIII, OpenSSL Functions, and
Appendix O
