stream_socket_enable_crypto

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

stream_socket_enable_crypto — Activa/desactiva la encriptación en un socket ya conectado

Descripción

stream_socket_enable_crypto(
    resource $stream,
    bool $enable,
    int $crypto_type = ?,
    resource $session_stream = ?
): mixed

Habilita o deshabilita la encriptación en un flujo.

Una vez que la configuración de encriptación está habilitada, la criptografía se puede activar o desactivar pasando true o false al parámetro enable.

Parámetros

stream

El recurso de flujo.

enable

Activa/descativa la criptografía en el flujo.

crypto_type

Configura la encriptación en el flujo. Los métodos válidos son

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

Si se omite, se utilizará en su lugar la opción de contexto crypto_type sobre el contexto SSL del flujo.

session_stream

Establece el flujo con los ajustes de session_stream.

Valores devueltos

Devuelve true si se tuvo éxito, false si la negociación falló o 0 si no hay suficiente información y se debería intertar otra vez (sólo para sockets no bloqueados).

Historial de cambios

Versión	Descripción
5.6.0	`crypto_type` ahora es opcional.

Ejemplos

Ejemplo #1 Ejemplo de stream_socket_enable_crypto()

<?php
$fp = stream_socket_client("tcp://myproto.example.com:31337", $errno, $errstr, 30);
if (!$fp) {
    die("Incapaz de conectar a: $errstr ($errno)");
}

/* Activar la encriptación para la fase de identificación */
stream_socket_enable_crypto($fp, true, STREAM_CRYPTO_METHOD_SSLv23_CLIENT);
fwrite($fp, "USER god\r\n");
fwrite($fp, "PASS secret\r\n");

/* Desactivar la encriptación para el resto */
stream_socket_enable_crypto($fp, false);

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

fclose($fp);
?>

El resultado del ejemplo sería algo similar a:

Ver también

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User Contributed Notes 8 notes

down

bobe at webnaute dot net ¶

8 years 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);
?>

down

Anonymous ¶

2 years ago


If you need to change a stream from unencrypted to crypted after unencrypted traffic has been processed, you use the stream-socket-recvfrom function to read instead of fread when reading the unencrypted traffic. Using fread will cause some of the buffer of the initial CLIENT HELLO message to be read into it's buffers causing the SSL handshake to fail in some situations.

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tigger (AT) tiggerswelt d0t net ¶

17 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 ;-)

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play dot it at play-it dot net ¶

1 year ago


Information to the difference of `crypto_method`

There is `STREAM_CRYPTO_METHOD_*_CLIENT` and `STREAM_CRYPTO_METHOD_*_SERVER`

`STREAM_CRYPTO_METHOD_*_CLIENT` is used for clients, like:
```php
<?php
$client = stream_socket_client("tcp://example.com:443", $errno, $errstr);
stream_socket_enable_crypto($client, true, STREAM_CRYPTO_METHOD_TLS_CLIENT);

//...
?>
```

This code makes a TLS Handshake and the `stream_socket_enable_crypto` sends a `Client HELLO`

`STREAM_CRYPTO_METHOD_*_SERVER` is used for servers, like:
<?php
$server = stream_socket_server("tcp://example.com:443", $errno, $errstr, STREAM_SERVER_BIND | STREAM_SERVER_LISTEN);
stream_context_set_option($server, ["ssl" => [
    "local_cert" => __DIR__."/https.crt",
    "local_pk" => __DIR__."/https.key",
]]);

//...

$client = stream_socket_accept($server);
stream_socket_enable_crypto($client, true, STREAM_CRYPTO_METHOD_TLS_SERVER);

//...
?>

This code makes a TLS Handshake and the `stream_socket_enable_crypto` sends a `Server HELLO` after the client send a `Client HELLO`.

so use `STREAM_CRYPTO_METHOD_*_CLIENT` for requesting data and `STREAM_CRYPTO_METHOD_*_SERVER` for serving data, after accepting a client.

down

Zero ¶

1 year ago


Since PHP 7.2, TLS equates to TLS_ANY, so STREAM_CRYPTO_METHOD_TLS_CLIENT means any TLS versions.

down

cgy at anymacro dot com ¶

6 years ago


$context = stream_context_create();
stream_context_set_option($context, 'ssl', 'allow_self_signed', false);
stream_context_set_option($context, 'ssl', 'verify_peer', false);
stream_context_set_option($context, 'ssl', 'verify_peer_name', false);
$fp = stream_socket_client("unix:///tmp/ssl.sock", $errno, $errstr, 30,STREAM_CLIENT_ASYNC_CONNECT | STREAM_CLIENT_CONNECT,$context);

stream_socket_enable_crypto($fp, true, STREAM_CRYPTO_METHOD_TLS_CLIENT);

错误提示：
PHP Warning:  stream_socket_enable_crypto(): this stream does not support SSL/crypto

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bobe at webnaute dot net ¶

9 years 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.

down

-1

mark at kinoko dot fr ¶

17 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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