Differential D925 Diff 2170 src/app/Backends/IMAP.php

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src/app/Backends/IMAP.php

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				<?php

				namespace App\Backends;

				use App\Domain;
				use App\User;

				class IMAP
				{
				/**
				* Check if an account is set up
				*
				* @param string $username User login (email address)
				*
				* @return bool True if an account exists and is set up, False otherwise
				*/
				public static function verifyAccount(string $username): bool
				{
				$config = self::getConfig();
				$imap = self::initIMAP($config, $username);

				$folders = $imap->listSubscribed('', '*');

				if (!is_array($folders)) {
				throw new \Exception("Failed to get IMAP folders");
				}

				$imap->closeConnection();

				return count($folders) > 1;
				}

				/**
				* Initialize connection to IMAP
				*/
				private static function initIMAP(array $config, string $login_as = null)
				{
				$imap = new \rcube_imap_generic();

				if (\config('app.debug')) {
				$imap->setDebug(true, 'App\Backends\IMAP::logDebug');
				}

				if ($login_as) {
				$config['options']['auth_cid'] = $config['user'];
				$config['options']['auth_pw'] = $config['password'];
				$config['options']['auth_type'] = 'PLAIN';
				$config['user'] = $login_as;
				}

				$imap->connect($config['host'], $config['user'], $config['password'], $config['options']);

				if (!$imap->connected()) {
				$message = sprintf("Login failed for %s against %s. %s", $config['user'], $config['host'], $imap->error);

				\Log::error($message);

				throw new \Exception("Connection to IMAP failed");
				}

				return $imap;
				}

				/**
				* Get LDAP configuration for specified access level
				*/
				private static function getConfig()
				{
				$uri = \parse_url(\config('imap.uri'));
				$default_port = 143;
				$ssl_mode = null;

				if (isset($uri['scheme'])) {
				if (preg_match('/^(ssl\|imaps)/', $uri['scheme'])) {
				$default_port = 993;
				$ssl_mode = 'ssl';
				} elseif ($uri['scheme'] === 'tls') {
				$ssl_mode = 'tls';
				}
				}

				$config = [
				'host' => $uri['host'],
				'user' => \config('imap.admin_login'),
				'password' => \config('imap.admin_password'),
				'options' => [
				'port' => !empty($uri['port']) ? $uri['port'] : $default_port,
				'ssl_mode' => $ssl_mode,
				'socket_options' => [
				'ssl' => [
				'verify_peer' => \config('imap.verify_peer'),
				'verify_peer_name' => \config('imap.verify_name'),
				'cafile' => \config('imap.cafile'),
				],
				],
				],
				];

				return $config;
				}

				/**
				* Debug logging callback
				*/
				public static function logDebug($conn, $msg): void
				{
				$msg = '[IMAP] ' . $msg;

				\Log::debug($msg);
				}
				}