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Editing: KerberosAuth.php

<?php
/**
 * SPDX-FileCopyrightText: 2018 Robin Appelman <robin@icewind.nl>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */

namespace Icewind\SMB;

use Icewind\SMB\Exception\Exception;

/**
 * Use existing kerberos ticket to authenticate
 */
class KerberosAuth implements IAuth {
	/** @var ?KerberosTicket */
	protected $ticket = null;

public function getTicket(): ?KerberosTicket {
		return $this->ticket;
	}

public function setTicket(?KerberosTicket $ticket): void {
		$this->ticket = $ticket;
	}

public function getUsername(): ?string {
		return 'dummy';
	}

public function getWorkgroup(): ?string {
		return 'dummy';
	}

public function getPassword(): ?string {
		return null;
	}

private function setEnv():void {
		$ticket = $this->getTicket();
		if ($ticket) {
			$ticket->validate();

// note that even if the ticket name is the value we got from `getenv("KRB5CCNAME")` we still need to set the env variable ourselves
			// this is because `getenv` also reads the variables passed from the SAPI (apache-php) and we need to set the variable in the OS's env
			putenv("KRB5CCNAME=" . $ticket->getCacheName());
		}
	}

public function getExtraCommandLineArguments(): string {
		$this->setEnv();
		return '-k';
	}

public function setExtraSmbClientOptions($smbClientState): void {
		$this->setEnv();

$success = (bool)smbclient_option_set($smbClientState, SMBCLIENT_OPT_USE_KERBEROS, true);
		$success = $success && smbclient_option_set($smbClientState, SMBCLIENT_OPT_FALLBACK_AFTER_KERBEROS, false);

if (!$success) {
			throw new Exception("Failed to set smbclient options for kerberos auth");
		}
	}
}

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