stream_socket_enable_crypto

(PHP 5 >= 5.1.0, PHP 7)

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

说明

mixed stream_socket_enable_crypto ( resource $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.

参数

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_CLIENT
STREAM_CRYPTO_METHOD_SSLv3_CLIENT
STREAM_CRYPTO_METHOD_SSLv23_CLIENT
STREAM_CRYPTO_METHOD_ANY_CLIENT
STREAM_CRYPTO_METHOD_TLS_CLIENT
STREAM_CRYPTO_METHOD_TLSv1_0_CLIENT
STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT
STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT
STREAM_CRYPTO_METHOD_SSLv2_SERVER
STREAM_CRYPTO_METHOD_SSLv3_SERVER
STREAM_CRYPTO_METHOD_SSLv23_SERVER
STREAM_CRYPTO_METHOD_ANY_SERVER
STREAM_CRYPTO_METHOD_TLS_SERVER
STREAM_CRYPTO_METHOD_TLSv1_0_SERVER
STREAM_CRYPTO_METHOD_TLSv1_1_SERVER
STREAM_CRYPTO_METHOD_TLSv1_2_SERVER

If omitted, the crypto_type context option on the stream's SSL context will be used instead.

session_stream

Seed the stream with settings from session_stream.

返回值

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).

更新日志

版本	说明
5.6.0	Introduce `STREAM_CRYPTO_METHOD_ANY_CLIENT`, `STREAM_CRYPTO_METHOD_TLSv1_0_CLIENT`, `STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT`, `STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT`, `STREAM_CRYPTO_METHOD_ANY_SERVER`, `STREAM_CRYPTO_METHOD_TLSv1_0_SERVER`, `STREAM_CRYPTO_METHOD_TLSv1_1_SERVER`, `STREAM_CRYPTO_METHOD_TLSv1_2_SERVER`.
5.6.0	The `crypto_type` is now optional.

范例

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：

参见

User Contributed Notes

bobe at webnaute dot net 06-Apr-2016 03:35


Constants added in PHP 5.6 :



STREAM_CRYPTO_METHOD_ANY_CLIENT

STREAM_CRYPTO_METHOD_TLSv1_0_CLIENT

STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT

STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT

STREAM_CRYPTO_METHOD_ANY_SERVER

STREAM_CRYPTO_METHOD_TLSv1_0_SERVER

STREAM_CRYPTO_METHOD_TLSv1_1_SERVER

STREAM_CRYPTO_METHOD_TLSv1_2_SERVER



Now, be careful because since PHP 5.6.7, STREAM_CRYPTO_METHOD_TLS_CLIENT (same for _SERVER) no longer means any tls version but tls 1.0 only (for "backward compatibility"...).



Before PHP 5.6.7 :

STREAM_CRYPTO_METHOD_SSLv23_CLIENT = STREAM_CRYPTO_METHOD_SSLv2_CLIENT|STREAM_CRYPTO_METHOD_SSLv3_CLIENT

STREAM_CRYPTO_METHOD_TLS_CLIENT = STREAM_CRYPTO_METHOD_TLSv1_0_CLIENT|STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT|STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT



PHP >= 5.6.7

STREAM_CRYPTO_METHOD_SSLv23_CLIENT = STREAM_CRYPTO_METHOD_TLSv1_0_CLIENT|STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT|STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT

STREAM_CRYPTO_METHOD_TLS_CLIENT = STREAM_CRYPTO_METHOD_TLSv1_0_CLIENT



PHP bug : https://bugs.php.net/bug.php?id=69195

Commit : https://github.com/php/php-src/commit/10bc5fd4c4c8e1dd57bd911b086e9872a56300a0



STREAM_CRYPTO_METHOD_SSLv23_CLIENT is not safe to use because before php 5.6.7, it means sslv2 or sslv3. So, you should do this :

<?php

$crypto_method = STREAM_CRYPTO_METHOD_TLS_CLIENT;



if (defined('STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT')) {

    $crypto_method |= STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT;

    $crypto_method |= STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT;

}



stream_socket_enable_crypto($socket, true, $crypto_method);

?>

bobe at webnaute dot net 21-Mar-2015 01:54


There is an error in the description of the third argument:

"If omitted, the crypto_type context option on the stream's SSL context will be used instead."



The name of the context option is "crypto_method", NOT "crypto_type" which is just the name of the argument.

mark at kinoko dot fr 06-Nov-2007 08:00


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 30-May-2007 12:15


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 ;-)