move backends into their own namespace and add support for multiple auth methods

src/KerberosAuth.php

@@ -0,0 +1,49 @@
+<?php
+/**
+ * @copyright Copyright (c) 2018 Robin Appelman <robin@icewind.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Icewind\SMB;
+
+/**
+ * Use existing kerberos ticket to authenticate
+ */
+class KerberosAuth implements IAuth {
+	public function getUsername() {
+		return 'dummy';
+	}
+
+	public function getWorkgroup() {
+		return 'dummy';
+	}
+
+	public function getPassword() {
+		return null;
+	}
+
+	public function getExtraCommandLineArguments() {
+		return '-k';
+	}
+
+	public function setExtraSmbClientOptions($smbClientState) {
+		smbclient_option_set($smbClientState, SMBCLIENT_OPT_USE_KERBEROS, true);
+		smbclient_option_set($smbClientState, SMBCLIENT_OPT_FALLBACK_AFTER_KERBEROS, false);
+	}
+
+}