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stream_socket_enable_crypto

Turns encryption on/off on an already connected socket (PHP 5 >= 5.1.0)
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 2387. 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);
?>


OpenSSL, and Appendix Q, List of Supported Socket Transports