PHP 5.6.0beta1 released

Internet Domain: TCP, UDP, SSL, e TLS

PHP 4, PHP 5, PHP 6. ssl:// & tls:// desde o PHP 4.3.0 sslv2:// & sslv3:// desde o PHP 5.0.2

Nota: Se nenhum transporte for especificado, tcp:// será usado.

  • 127.0.0.1
  • fe80::1
  • www.example.com
  • tcp://127.0.0.1
  • tcp://fe80::1
  • tcp://www.example.com
  • udp://www.example.com
  • ssl://www.example.com
  • sslv2://www.example.com
  • sslv3://www.example.com
  • tls://www.example.com

Sockets no Domínio Internet esperam um número de porta além do endereço desejado. No caso de fsockopen(), esta é especificada no segundo parâmetro e, portanto, não afeta a formatação da URL. Com stream_socket_client() e funções relacionadas como com as URLs tradicionais, no entanto, o número da porta é especificado como um sufixo à URL delimitada por dois-pontos.

  • tcp://127.0.0.1:80
  • tcp://[fe80::1]:80
  • tcp://www.example.com:80

Nota: Endereços númericos com número de porta em IPv6
No segundo exemplo acima, enquanto os exemplos em IPv4 e nome de host permaneceram iguais, exceto pela adição do dois-pontos e número da porta, o endereço em IPv6 é envolto em colchetes: [fe80::1]. Isso é para destinguir entre os dois pontos de um endereço IPv6 e como separador de porta no IPv4.

Os transportes ssl:// e tls:// (disponíveis apenas quando o suporte a openssl é compilado no PHP) são extensões do transporte tcp:// que incluem encriptação SSL. Desde o PHP 4.3.0, suporte a OpenSSL deve ser compilado estaticamente no PHP, no PHP 5.0.0 ele pode ser compilado como um módulo ou estaticamente.

ssl:// tentará negociar uma conexão SSL V2 ou SSL V3, dependendo das capacidades e preferências do host remoto. sslv2:// e sslv3:// selecionará o protocolo de maneira explícita.

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User Contributed Notes 4 notes

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2
christian at lantian dot eu
7 months ago
@pablo dot livardo  :  I think that the problem you found is caused by the difference between the client/server encryption methods used.

The 465 port is used for SMTPS, and the server starts the encryption immediately it receives your connection. So, your code will work.

The 587 port is used for Submission (MSA or Mail Submission Agent) which works like the port 25. The server accepts your connection and doesn't activate the encryption. If you want an encrypted connection on the port 587, you must connect on it without encryption, you must start to dialog with the server (with EHLO) and after that you must ask the server to start the encrypted connection using the STARTTLS command. The server starts the encryption and now you can start as well the encryption on your client.

So, in few words, you can not use :

<?php $fp = fsockopen("tls://mail.example.com", 587, $errno, $errstr);  ?> 

but you can use:

 <?php $fp = stream_socket_client("mail.example.com:587", $errno, $errstr); ?> 

and after you send the STARTTLS command, you can enable the crypto:

<?php stream_socket_enable_crypto($fp, true, STREAM_CRYPTO_METHOD_SSLv23_CLIENT); ?>

P.S. My previous note on this page was totally wrong, so I ask the php.net admin to remove it.

:)
up
2
stefan at example dot com
3 years ago
Actually, PHP is very able to start with an unencrypted connection and then switch to an encrypted one - refer to http://php.net/stream_socket_enable_crypto .
up
1
pablo dot livardo at gmail dot com
4 years ago
I've been having a problem with a TLS connection.

<?php
$fp
= fsockopen("tls://mail.example.com", 587, $errno, $errstr);
?>

Which gives me an error of:

SSL operation failed with code 1. OpenSSL Error messages: error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number

I believe this is caused by PHP not being able to start with an unencrypted connection and then switch to encryption even though the functionality is built into OpenSSL.

For Google Mail users you can avoid this by using port 465 instead of 587.
up
0
christian at lantian dot eu
7 months ago
@pablo dot livardo  :  I think that the problem you found is caused by the difference between the client/server encryption methods used.

You tried to access the port 587 using TLS encryption, but the server uses the SSLv3 encryption on this port.

You can communicate with the Google server on port 465 because on this port the communication is encrypted using TLS and your client is configured to recognize the TLS.

So, if you want to connect on the Google server over the port 587, you simply must write:

<?php
$fp
= fsockopen("ssl://mail.example.com", 587, $errno, $errstr);
?>

instead of:

<?php
$fp
= fsockopen("tls://mail.example.com", 587, $errno, $errstr);
?>

:)
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