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stream_socket_enable_crypto

Description

The stream_socket_enable_crypto of Stream for PHP turns encryption on/off on an already connected socket.

Syntax

stream_socket_enable_crypto(
    resource $stream,
    bool $enable,
    ?int $crypto_method = null,
    ?resource $session_stream = null
): int|bool

Parameters

stream

The stream resource.

enable

Enable/disable cryptography on the stream.

crypto_type

Setup encryption on the stream.

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_method context option on the stream's SSL context will be used instead.

session_stream

Seed the stream with settings from session_stream.

Return

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).

Examples

1 · crypto_type

<?

$protocol = "tls";
$host = "osbo.com";
$port = "443";

$remote_socket = $protocol . "://" . $host . ":" . $port;
$timeout = 30;

$stream = stream_socket_client($remote_socket, $errno, $errstr, $timeout);

    if(!$stream)
    {
        exit("$errstr ($errno)");
    }

    // turn on encryption for login
    $enable = true;
    $crypto_type = STREAM_CRYPTO_METHOD_SSLv23_CLIENT;

    stream_socket_enable_crypto($stream, $enable, $crypto_type);

    fwrite($stream, "USER user\r\n");
    fwrite($stream, "PASS secret\r\n");

    // turn off encryption for the rest
    $enable = false;

    stream_socket_enable_crypto($stream, $enable);

    $string = "GET / HTTP/1.1\r\n";
    $string .= "Host: $host\r\n";
    $string .= "Connection: close\r\n\r\n";

    fwrite($stream, $string);

    $length = 1024;

    while(!feof($stream))
    {
        echo fgets($stream, $length);
    }

fclose($stream);

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