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<?php |
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/* |
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* File: ImapProtocol.php |
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* Category: Protocol |
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* Author: M.Goldenbaum |
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* Created: 16.09.20 18:27 |
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* Updated: - |
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* |
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* Description: |
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* - |
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*/ |
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namespace Webklex\PHPIMAP\Connection\Protocols; |
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use Webklex\PHPIMAP\Exceptions\ConnectionFailedException; |
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use Webklex\PHPIMAP\IMAP; |
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/** |
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* Class Protocol |
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* |
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* @package Webklex\PHPIMAP\Connection\Protocols |
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*/ |
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abstract class Protocol implements ProtocolInterface { |
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/** |
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* Default connection timeout in seconds |
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*/ |
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protected $connection_timeout = 30; |
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/** |
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* @var boolean |
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*/ |
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protected $debug = false; |
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/** |
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* @var false|resource |
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*/ |
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public $stream = false; |
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/** |
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* Connection encryption method |
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* @var mixed $encryption |
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*/ |
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protected $encryption = false; |
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/** |
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* Set to false to ignore SSL certificate validation |
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* @var bool |
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*/ |
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protected $cert_validation = true; |
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/** |
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* Proxy settings |
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* @var array |
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*/ |
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protected $proxy = [ |
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'socket' => null, |
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'request_fulluri' => false, |
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'username' => null, |
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'password' => null, |
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]; |
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/** |
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* Get an available cryptographic method |
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* |
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* @return int |
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*/ |
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public function getCryptoMethod() { |
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// Allow the best TLS version(s) we can |
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$cryptoMethod = STREAM_CRYPTO_METHOD_TLS_CLIENT; |
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// PHP 5.6.7 dropped inclusion of TLS 1.1 and 1.2 in STREAM_CRYPTO_METHOD_TLS_CLIENT |
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// so add them back in manually if we can |
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if (defined('STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT')) { |
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$cryptoMethod = STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT; |
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}elseif (defined('STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT')) { |
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$cryptoMethod = STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT; |
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} |
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return $cryptoMethod; |
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} |
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/** |
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* Enable SSL certificate validation |
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* |
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* @return $this |
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*/ |
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public function enableCertValidation() { |
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$this->cert_validation = true; |
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return $this; |
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} |
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/** |
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* Disable SSL certificate validation |
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* @return $this |
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*/ |
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public function disableCertValidation() { |
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$this->cert_validation = false; |
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return $this; |
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} |
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/** |
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* Set SSL certificate validation |
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* @var int $cert_validation |
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* |
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* @return $this |
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*/ |
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public function setCertValidation($cert_validation) { |
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$this->cert_validation = $cert_validation; |
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return $this; |
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} |
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/** |
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* Should we validate SSL certificate? |
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* |
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* @return bool |
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*/ |
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public function getCertValidation() { |
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return $this->cert_validation; |
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} |
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/** |
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* Set connection proxy settings |
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* @var array $options |
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* |
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* @return $this |
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*/ |
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public function setProxy($options) { |
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foreach ($this->proxy as $key => $val) { |
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if (isset($options[$key])) { |
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$this->proxy[$key] = $options[$key]; |
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} |
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} |
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return $this; |
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} |
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/** |
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* Get the current proxy settings |
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* |
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* @return array |
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*/ |
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public function getProxy() { |
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return $this->proxy; |
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} |
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/** |
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* Prepare socket options |
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* @var string $transport |
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* |
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* @return array |
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*/ |
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private function defaultSocketOptions($transport) { |
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$options = []; |
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if ($this->encryption != false) { |
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$options["ssl"] = [ |
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'verify_peer_name' => $this->getCertValidation(), |
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'verify_peer' => $this->getCertValidation(), |
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]; |
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} |
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if ($this->proxy["socket"] != null) { |
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$options[$transport]["proxy"] = $this->proxy["socket"]; |
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$options[$transport]["request_fulluri"] = $this->proxy["request_fulluri"]; |
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if ($this->proxy["username"] != null) { |
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$auth = base64_encode($this->proxy["username"].':'.$this->proxy["password"]); |
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$options[$transport]["header"] = [ |
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"Proxy-Authorization: Basic $auth" |
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]; |
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} |
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} |
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return $options; |
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} |
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/** |
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* Create a new resource stream |
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* @param $transport |
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* @param string $host hostname or IP address of IMAP server |
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* @param int $port of IMAP server, default is 143 (993 for ssl) |
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* @param int $timeout timeout in seconds for initiating session |
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* |
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* @return resource|boolean The socket created. |
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* @throws ConnectionFailedException |
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*/ |
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protected function createStream($transport, $host, $port, $timeout) { |
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$socket = "$transport://$host:$port"; |
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$stream = stream_socket_client($socket, $errno, $errstr, $timeout, |
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STREAM_CLIENT_CONNECT, |
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stream_context_create($this->defaultSocketOptions($transport)) |
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); |
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if (!$stream) { |
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throw new ConnectionFailedException($errstr, $errno); |
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} |
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if (false === stream_set_timeout($stream, $timeout)) { |
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throw new ConnectionFailedException('Failed to set stream timeout'); |
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} |
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return $stream; |
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} |
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/** |
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* @return int |
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*/ |
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public function getConnectionTimeout() { |
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return $this->connection_timeout; |
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} |
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/** |
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* @param int $connection_timeout |
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* @return Protocol |
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*/ |
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public function setConnectionTimeout($connection_timeout) { |
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if ($connection_timeout !== null) { |
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$this->connection_timeout = $connection_timeout; |
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} |
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return $this; |
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} |
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/** |
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* Get the UID key string |
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* @param int|string $uid |
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* |
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* @return string |
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*/ |
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public function getUIDKey($uid) { |
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if ($uid == IMAP::ST_UID || $uid == IMAP::FT_UID) { |
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return "UID"; |
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} |
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if (strlen($uid) > 0 && !is_numeric($uid)) { |
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return (string)$uid; |
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} |
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return ""; |
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} |
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public function buildUIDCommand($command, $uid) { |
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return trim($this->getUIDKey($uid)." ".$command); |
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} |
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} |
This check looks for assignments to scalar types that may be of the wrong type.
To ensure the code behaves as expected, it may be a good idea to add an explicit type cast.