stream_socket_enable_crypto

(PHP 5 >= 5.1.0)

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_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.

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	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 )" );
}

 
 stream_socket_enable_crypto ( $fp ,  true ,  STREAM_CRYPTO_METHOD_SSLv23_CLIENT );
 fwrite ( $fp ,  "USER god\r\n" );
 fwrite ( $fp ,  "PASS secret\r\n" );

 
 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

OpenSSL 函数
所支持的套接字传输器（Socket Transports）列表

用户评论:

[#1] bobe at webnaute dot net [2015-03-20 16:54:34]

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.

[#2] mark at kinoko dot fr [2007-11-06 11:00:10]

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...

[#3] tigger (AT) tiggerswelt d0t net [2007-05-30 03:15:55]

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 ;-)