PHP 7.0.6 Released

stream_socket_enable_crypto

(PHP 5 >= 5.1.0)

stream_socket_enable_cryptoTurns encryption on/off on an already connected socket

Descrizione

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.

Elenco dei parametri

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_TLS_CLIENT
  • STREAM_CRYPTO_METHOD_SSLv2_SERVER
  • STREAM_CRYPTO_METHOD_SSLv3_SERVER
  • STREAM_CRYPTO_METHOD_SSLv23_SERVER
  • STREAM_CRYPTO_METHOD_TLS_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.

Valori restituiti

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).

Log delle modifiche

Versione Descrizione
5.6.0 The crypto_type is now optional.

Esempi

Example #1 stream_socket_enable_crypto() example

<?php
$fp 
stream_socket_client("tcp://myproto.example.com:31337"$errno$errstr30);
if (!
$fp) {
    die(
"Unable to connect: $errstr ($errno)");
}

/* Turn on encryption for login phase */
stream_socket_enable_crypto($fptrueSTREAM_CRYPTO_METHOD_SSLv23_CLIENT);
fwrite($fp"USER god\r\n");
fwrite($fp"PASS secret\r\n");

/* Turn off encryption for the rest */
stream_socket_enable_crypto($fpfalse);

while (
$motd fgets($fp)) {
    echo 
$motd;
}

fclose($fp);
?>

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User Contributed Notes 4 notes

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3
tigger (AT) tiggerswelt d0t net
8 years ago
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 ;-)
up
2
mark at kinoko dot fr
8 years ago
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...
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0
bobe at webnaute dot net
28 days ago
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);
?>
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0
bobe at webnaute dot net
1 year ago
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.
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