# stream_socket_enable_crypto

(PHP 5 >= 5.1.0)

stream_socket_enable_crypto — Turns encryption on/off on an already connected socket

### 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);
?>`

OpenSSL, and List of Supported Socket Transports