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/
EsmtpTransport.php
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EsmtpTransport.php
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Mailer\Transport\Smtp;
use Psr\Log\LoggerInterface;
use Symfony\Component\Mailer\Exception\TransportException;
use Symfony\Component\Mailer\Exception\TransportExceptionInterface;
use Symfony\Component\Mailer\Transport\Smtp\Auth\AuthenticatorInterface;
use Symfony\Component\Mailer\Transport\Smtp\Stream\SocketStream;
use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
/**
* Sends Emails over SMTP with ESMTP support.
*
* @author Fabien Potencier <fabien@symfony.com>
* @author Chris Corbyn
*
* @experimental in 4.3
*/
class EsmtpTransport extends SmtpTransport
{
private $authenticators = [];
private $username = '';
private $password = '';
private $authMode;
public function __construct(string $host = 'localhost', int $port = 25, string $encryption = null, string $authMode = null, EventDispatcherInterface $dispatcher = null, LoggerInterface $logger = null)
{
parent::__construct(null, $dispatcher, $logger);
$this->authenticators = [
new Auth\PlainAuthenticator(),
new Auth\LoginAuthenticator(),
new Auth\XOAuth2Authenticator(),
new Auth\CramMd5Authenticator(),
];
/** @var SocketStream $stream */
$stream = $this->getStream();
$stream->setHost($host);
$stream->setPort($port);
if (null !== $encryption) {
$stream->setEncryption($encryption);
}
if (null !== $authMode) {
$this->setAuthMode($authMode);
}
}
public function setUsername(string $username): self
{
$this->username = $username;
return $this;
}
public function getUsername(): string
{
return $this->username;
}
public function setPassword(string $password): self
{
$this->password = $password;
return $this;
}
public function getPassword(): string
{
return $this->password;
}
public function setAuthMode(string $mode): self
{
$this->authMode = $mode;
return $this;
}
public function getAuthMode(): string
{
return $this->authMode;
}
public function addAuthenticator(AuthenticatorInterface $authenticator): void
{
$this->authenticators[] = $authenticator;
}
protected function doHeloCommand(): void
{
try {
$response = $this->executeCommand(sprintf("EHLO %s\r\n", $this->getLocalDomain()), [250]);
} catch (TransportExceptionInterface $e) {
parent::doHeloCommand();
return;
}
/** @var SocketStream $stream */
$stream = $this->getStream();
if ($stream->isTLS()) {
$this->executeCommand("STARTTLS\r\n", [220]);
if (!$stream->startTLS()) {
throw new TransportException('Unable to connect with TLS encryption.');
}
try {
$response = $this->executeCommand(sprintf("EHLO %s\r\n", $this->getLocalDomain()), [250]);
} catch (TransportExceptionInterface $e) {
parent::doHeloCommand();
return;
}
}
$capabilities = $this->getCapabilities($response);
if (\array_key_exists('AUTH', $capabilities)) {
$this->handleAuth($capabilities['AUTH']);
}
}
private function getCapabilities($ehloResponse): array
{
$capabilities = [];
$lines = explode("\r\n", trim($ehloResponse));
array_shift($lines);
foreach ($lines as $line) {
if (preg_match('/^[0-9]{3}[ -]([A-Z0-9-]+)((?:[ =].*)?)$/Di', $line, $matches)) {
$value = strtoupper(ltrim($matches[2], ' ='));
$capabilities[strtoupper($matches[1])] = $value ? explode(' ', $value) : [];
}
}
return $capabilities;
}
private function handleAuth(array $modes): void
{
if (!$this->username) {
return;
}
$authNames = [];
$errors = [];
$modes = array_map('strtolower', $modes);
foreach ($this->getActiveAuthenticators() as $authenticator) {
if (!\in_array(strtolower($authenticator->getAuthKeyword()), $modes, true)) {
continue;
}
$authNames[] = $authenticator->getAuthKeyword();
try {
$authenticator->authenticate($this);
return;
} catch (TransportExceptionInterface $e) {
$this->executeCommand("RSET\r\n", [250]);
// keep the error message, but tries the other authenticators
$errors[$authenticator->getAuthKeyword()] = $e;
}
}
if (!$authNames) {
throw new TransportException('Failed to find an authenticator supported by the SMTP server.');
}
$message = sprintf('Failed to authenticate on SMTP server with username "%s" using the following authenticators: "%s".', $this->username, implode('", "', $authNames));
foreach ($errors as $name => $error) {
$message .= sprintf(' Authenticator "%s" returned "%s".', $name, $error);
}
throw new TransportException($message);
}
/**
* @return AuthenticatorInterface[]
*/
private function getActiveAuthenticators(): array
{
if (!$mode = strtolower($this->authMode)) {
return $this->authenticators;
}
foreach ($this->authenticators as $authenticator) {
if (strtolower($authenticator->getAuthKeyword()) === $mode) {
return [$authenticator];
}
}
throw new TransportException(sprintf('Auth mode "%s" is invalid.', $mode));
}
}