PHP 8.4.0 RC2 available for testing

stream_socket_enable_crypto

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

stream_socket_enable_cryptoLiga ou desliga criptografia em socket já conectado

Descrição

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

Liga ou desliga criptografia no fluxo.

Assim que as configurações de criptografia estiverem estabelecidos, a criptografia pode ser ligada e desligada dinamicamente passando-se true ou false no parâmetro enable.

Valor Retornado

Retorna true em caso de sucesso, false se a negociação falhar ou 0 se não houver dados suficientes levando a uma nova tentativa (apenas para sockets em modo de não-bloqueio).

Registro de Alterações

Versão Descrição
8.0.0 session_stream agora pode ser nulo.

Exemplos

Exemplo #1 Exemplo de stream_socket_enable_crypto()

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

/* Liga criptografia para a fase de autenticação */
stream_socket_enable_crypto($fp, true, STREAM_CRYPTO_METHOD_SSLv23_CLIENT);
fwrite($fp, "USER god\r\n");
fwrite($fp, "PASS secret\r\n");

/* Desliga a criptografia para o restante */
stream_socket_enable_crypto($fp, false);

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

fclose($fp);
?>

O exemplo acima produzirá algo semelhante a:


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User Contributed Notes 4 notes

up
3
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 ;-)
up
2
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.
up
2
play dot it at play-it dot net
11 months 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.
up
1
Zero
1 year ago
Since PHP 7.2, TLS equates to TLS_ANY, so STREAM_CRYPTO_METHOD_TLS_CLIENT means any TLS versions.
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