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Code Editor : smb-notify.py
#!/usr/bin/env python3 # Unix SMB/CIFS implementation. Tests for smb notify # Copyright (C) Björn Baumbach <bb@samba.org> 2020 # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU 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 General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. import sys import os sys.path.insert(0, "bin/python") os.environ["PYTHONUNBUFFERED"] = "1" import samba import random from samba.tests import TestCase from samba import NTSTATUSError from samba import credentials from samba.ntstatus import NT_STATUS_NOTIFY_CLEANUP from samba.samba3 import libsmb_samba_internal as libsmb from samba.samba3 import param as s3param from samba.dcerpc import security from samba import ntacls test_dir = os.path.join('notify_test_%d' % random.randint(0, 0xFFFF)) class SMBNotifyTests(TestCase): def setUp(self): super(SMBNotifyTests, self).setUp() self.server = samba.tests.env_get_var_value("SERVER") # create an SMB connection to the server self.lp = s3param.get_context() self.lp.load(samba.tests.env_get_var_value("SMB_CONF_PATH")) self.share = samba.tests.env_get_var_value("NOTIFY_SHARE") creds = credentials.Credentials() creds.guess(self.lp) creds.set_username(samba.tests.env_get_var_value("USERNAME")) creds.set_password(samba.tests.env_get_var_value("PASSWORD")) strict_checking = samba.tests.env_get_var_value('STRICT_CHECKING', allow_missing=True) if strict_checking is None: strict_checking = '1' self.strict_checking = bool(int(strict_checking)) self.smb_conn = libsmb.Conn(self.server, self.share, self.lp, creds) self.smb_conn_unpriv = None try: self.smb_conn.deltree(test_dir) except: pass self.smb_conn.mkdir(test_dir) def connect_unpriv(self): creds_unpriv = credentials.Credentials() creds_unpriv.guess(self.lp) creds_unpriv.set_username(samba.tests.env_get_var_value("USERNAME_UNPRIV")) creds_unpriv.set_password(samba.tests.env_get_var_value("PASSWORD_UNPRIV")) self.smb_conn_unpriv = libsmb.Conn(self.server, self.share, self.lp, creds_unpriv) def tearDown(self): super(SMBNotifyTests, self).tearDown() try: self.smb_conn.deltree(test_dir) except: pass def make_path(self, dirpath, filename): return os.path.join(dirpath, filename).replace('/', '\\') def test_notify(self): # setup notification request on the share root root_fnum = self.smb_conn.create(Name="", ShareAccess=1) root_notify = self.smb_conn.notify(fnum=root_fnum, buffer_size=0xffff, completion_filter=libsmb.FILE_NOTIFY_CHANGE_ALL, recursive=True) # setup notification request on the test_dir test_dir_fnum = self.smb_conn.create(Name=test_dir, ShareAccess=1) test_dir_notify = self.smb_conn.notify(fnum=test_dir_fnum, buffer_size=0xffff, completion_filter=libsmb.FILE_NOTIFY_CHANGE_ALL, recursive=True) # make sure we didn't receive any changes yet. self.smb_conn.echo() changes = root_notify.get_changes(wait=False) self.assertIsNone(changes) changes = test_dir_notify.get_changes(wait=False) self.assertIsNone(changes) # create a test directory dir_name = "dir" dir_path = self.make_path(test_dir, dir_name) self.smb_conn.mkdir(dir_path) # check for 'added' notifications changes = root_notify.get_changes(wait=True) self.assertIsNotNone(changes) self.assertEqual(changes[0]['name'], dir_path) self.assertEqual(changes[0]['action'], libsmb.NOTIFY_ACTION_ADDED) self.assertEqual(len(changes), 1) changes = test_dir_notify.get_changes(wait=True) self.assertIsNotNone(changes) self.assertEqual(changes[0]['name'], dir_name) self.assertEqual(changes[0]['action'], libsmb.NOTIFY_ACTION_ADDED) self.assertEqual(len(changes), 1) # readd notification requests root_notify = self.smb_conn.notify(fnum=root_fnum, buffer_size=0xffff, completion_filter=libsmb.FILE_NOTIFY_CHANGE_ALL, recursive=True) test_dir_notify = self.smb_conn.notify(fnum=test_dir_fnum, buffer_size=0xffff, completion_filter=libsmb.FILE_NOTIFY_CHANGE_ALL, recursive=True) # make sure we didn't receive any changes yet. self.smb_conn.echo() changes = root_notify.get_changes(wait=False) self.assertIsNone(changes) changes = test_dir_notify.get_changes(wait=False) self.assertIsNone(changes) # create subdir and trigger notifications sub_name = "subdir" sub_path_rel = self.make_path(dir_name, sub_name) sub_path_full = self.make_path(dir_path, sub_name) self.smb_conn.mkdir(sub_path_full) # check for 'added' notifications changes = root_notify.get_changes(wait=True) self.assertIsNotNone(changes) self.assertEqual(changes[0]['name'], sub_path_full) self.assertEqual(changes[0]['action'], libsmb.NOTIFY_ACTION_ADDED) self.assertEqual(len(changes), 1) changes = test_dir_notify.get_changes(wait=True) self.assertIsNotNone(changes) self.assertEqual(changes[0]['name'], sub_path_rel) self.assertEqual(changes[0]['action'], libsmb.NOTIFY_ACTION_ADDED) self.assertEqual(len(changes), 1) # readd notification requests root_notify = self.smb_conn.notify(fnum=root_fnum, buffer_size=0xffff, completion_filter=libsmb.FILE_NOTIFY_CHANGE_ALL, recursive=True) test_dir_notify = self.smb_conn.notify(fnum=test_dir_fnum, buffer_size=0xffff, completion_filter=libsmb.FILE_NOTIFY_CHANGE_ALL, recursive=True) # make sure we didn't receive any changes yet. self.smb_conn.echo() changes = root_notify.get_changes(wait=False) self.assertIsNone(changes) changes = test_dir_notify.get_changes(wait=False) self.assertIsNone(changes) # remove test dir and trigger notifications self.smb_conn.rmdir(sub_path_full) # check for 'removed' notifications changes = root_notify.get_changes(wait=True) self.assertIsNotNone(changes) self.assertEqual(changes[0]['name'], sub_path_full) self.assertEqual(changes[0]['action'], libsmb.NOTIFY_ACTION_REMOVED) self.assertEqual(len(changes), 1) changes = test_dir_notify.get_changes(wait=True) self.assertIsNotNone(changes) self.assertEqual(changes[0]['name'], sub_path_rel) self.assertEqual(changes[0]['action'], libsmb.NOTIFY_ACTION_REMOVED) self.assertEqual(len(changes), 1) # readd notification requests root_notify = self.smb_conn.notify(fnum=root_fnum, buffer_size=0xffff, completion_filter=libsmb.FILE_NOTIFY_CHANGE_ALL, recursive=True) test_dir_notify = self.smb_conn.notify(fnum=test_dir_fnum, buffer_size=0xffff, completion_filter=libsmb.FILE_NOTIFY_CHANGE_ALL, recursive=True) # make sure we didn't receive any changes yet. self.smb_conn.echo() changes = root_notify.get_changes(wait=False) self.assertIsNone(changes) changes = test_dir_notify.get_changes(wait=False) self.assertIsNone(changes) # closing the handle on test_dir will trigger # a NOTIFY_CLEANUP on test_dir_notify and # it also seems to update something on test_dir it self # and post a MODIFIED on root_notify # # TODO: find out why windows generates ACTION_MODIFIED # and why Samba doesn't self.smb_conn.close(test_dir_fnum) try: changes = test_dir_notify.get_changes(wait=True) self.fail() except samba.NTSTATUSError as err: self.assertEqual(err.args[0], NT_STATUS_NOTIFY_CLEANUP) self.smb_conn.echo() changes = root_notify.get_changes(wait=False) if self.strict_checking: self.assertIsNotNone(changes) if changes is not None: self.assertEqual(changes[0]['name'], test_dir) self.assertEqual(changes[0]['action'], libsmb.NOTIFY_ACTION_MODIFIED) self.assertEqual(len(changes), 1) # readd notification request root_notify = self.smb_conn.notify(fnum=root_fnum, buffer_size=0xffff, completion_filter=libsmb.FILE_NOTIFY_CHANGE_ALL, recursive=True) # make sure we didn't receive any changes yet. self.smb_conn.echo() changes = root_notify.get_changes(wait=False) self.assertIsNone(changes) # remove test_dir self.smb_conn.rmdir(dir_path) # check for 'removed' notifications changes = root_notify.get_changes(wait=True) self.assertIsNotNone(changes) self.assertEqual(changes[0]['name'], dir_path) self.assertEqual(changes[0]['action'], libsmb.NOTIFY_ACTION_REMOVED) self.assertEqual(len(changes), 1) # readd notification request root_notify = self.smb_conn.notify(fnum=root_fnum, buffer_size=0xffff, completion_filter=libsmb.FILE_NOTIFY_CHANGE_ALL, recursive=True) # closing the handle on test_dir will trigger # a NOTIFY_CLEANUP on root_notify self.smb_conn.close(root_fnum) try: changes = root_notify.get_changes(wait=True) self.fail() except samba.NTSTATUSError as err: self.assertEqual(err.args[0], NT_STATUS_NOTIFY_CLEANUP) def _test_notify_privileged_path(self, monitor_path=None, rel_prefix=None): self.connect_unpriv() domain_sid = security.dom_sid() # we just use S-0-0 smb_helper = ntacls.SMBHelper(self.smb_conn, domain_sid) private_name = "private" private_rel = self.make_path(rel_prefix, private_name) private_path = self.make_path(test_dir, private_name) # create a private test directory self.smb_conn.mkdir(private_path) # Get the security descriptor and replace it # with a one that only grants access to SYSTEM and the # owner. private_path_sd_old = smb_helper.get_acl(private_path) private_path_sd_new = security.descriptor() private_path_sd_new.type = private_path_sd_old.type private_path_sd_new.revision = private_path_sd_old.revision private_path_sd_new = security.descriptor.from_sddl("G:BAD:(A;;0x%x;;;%s)(A;;0x%x;;;%s)" % ( security.SEC_RIGHTS_DIR_ALL, security.SID_NT_SYSTEM, security.SEC_RIGHTS_DIR_ALL, str(private_path_sd_old.owner_sid)), domain_sid) private_path_sd_new.type |= security.SEC_DESC_SELF_RELATIVE private_path_sd_new.type |= security.SEC_DESC_DACL_PROTECTED set_secinfo = security.SECINFO_GROUP | security.SECINFO_DACL | security.SECINFO_PROTECTED_DACL smb_helper.set_acl(private_path, private_path_sd_new, sinfo=set_secinfo) # setup notification request as priviliged user monitor_priv_fnum = self.smb_conn.create(Name=monitor_path, ShareAccess=1) notify_priv = self.smb_conn.notify(fnum=monitor_priv_fnum, buffer_size=0xffff, completion_filter=libsmb.FILE_NOTIFY_CHANGE_ALL, recursive=True) # setup notification request as unpriviliged user monitor_unpriv_fnum = self.smb_conn_unpriv.create(Name=monitor_path, ShareAccess=1) notify_unpriv = self.smb_conn_unpriv.notify(fnum=monitor_unpriv_fnum, buffer_size=0xffff, completion_filter=libsmb.FILE_NOTIFY_CHANGE_ALL, recursive=True) # make sure we didn't receive any changes yet. self.smb_conn.echo() changes = notify_priv.get_changes(wait=False) self.assertIsNone(changes) self.smb_conn_unpriv.echo() changes = notify_unpriv.get_changes(wait=False) self.assertIsNone(changes) # trigger notification in the private dir new_name = 'test-new' new_rel = self.make_path(private_rel, new_name) new_path = self.make_path(private_path, new_name) self.smb_conn.mkdir(new_path) # check that only the privileged user received the changes changes = notify_priv.get_changes(wait=True) self.assertIsNotNone(changes) self.assertEqual(changes[0]['name'], new_rel) self.assertEqual(changes[0]['action'], libsmb.NOTIFY_ACTION_ADDED) self.assertEqual(len(changes), 1) notify_priv = self.smb_conn.notify(fnum=monitor_priv_fnum, buffer_size=0xffff, completion_filter=libsmb.FILE_NOTIFY_CHANGE_ALL, recursive=True) # check that the unprivileged user does not receives the changes self.smb_conn_unpriv.echo() changes = notify_unpriv.get_changes(wait=False) self.assertIsNone(changes) # and there's no additional change for the privileged user self.smb_conn.echo() changes = notify_priv.get_changes(wait=False) self.assertIsNone(changes) # trigger notification in the private dir self.smb_conn.rmdir(new_path) # check that only the privileged user received the changes changes = notify_priv.get_changes(wait=True) self.assertIsNotNone(changes) self.assertEqual(changes[0]['name'], new_rel) self.assertEqual(changes[0]['action'], libsmb.NOTIFY_ACTION_REMOVED) self.assertEqual(len(changes), 1) notify_priv = self.smb_conn.notify(fnum=monitor_priv_fnum, buffer_size=0xffff, completion_filter=libsmb.FILE_NOTIFY_CHANGE_ALL, recursive=True) # check that the unprivileged user does not receives the changes self.smb_conn_unpriv.echo() changes = notify_unpriv.get_changes(wait=False) self.assertIsNone(changes) # and there's no additional change for the privileged user self.smb_conn.echo() changes = notify_priv.get_changes(wait=False) self.assertIsNone(changes) # trigger notification for both self.smb_conn.rmdir(private_path) # check that both get thte notification changes = notify_unpriv.get_changes(wait=True) self.assertIsNotNone(changes) self.assertEqual(changes[0]['name'], private_rel) self.assertEqual(changes[0]['action'], libsmb.NOTIFY_ACTION_REMOVED) self.assertEqual(len(changes), 1) notify_unpriv = self.smb_conn_unpriv.notify(fnum=monitor_unpriv_fnum, buffer_size=0xffff, completion_filter=libsmb.FILE_NOTIFY_CHANGE_ALL, recursive=True) changes = notify_priv.get_changes(wait=True) self.assertIsNotNone(changes) self.assertEqual(changes[0]['name'], private_rel) self.assertEqual(changes[0]['action'], libsmb.NOTIFY_ACTION_REMOVED) self.assertEqual(len(changes), 1) notify_priv = self.smb_conn.notify(fnum=monitor_priv_fnum, buffer_size=0xffff, completion_filter=libsmb.FILE_NOTIFY_CHANGE_ALL, recursive=True) # check that the unprivileged user does not receives the changes self.smb_conn_unpriv.echo() changes = notify_unpriv.get_changes(wait=False) self.assertIsNone(changes) # and there's no additional change for the privileged user self.smb_conn.echo() changes = notify_priv.get_changes(wait=False) self.assertIsNone(changes) # closing the handle on will trigger a NOTIFY_CLEANUP self.smb_conn_unpriv.close(monitor_unpriv_fnum) try: changes = notify_unpriv.get_changes(wait=True) self.fail() except samba.NTSTATUSError as err: self.assertEqual(err.args[0], NT_STATUS_NOTIFY_CLEANUP) # there's no additional change for the privileged user self.smb_conn.echo() changes = notify_priv.get_changes(wait=False) self.assertIsNone(changes) # closing the handle on will trigger a NOTIFY_CLEANUP self.smb_conn.close(monitor_priv_fnum) try: changes = notify_priv.get_changes(wait=True) self.fail() except samba.NTSTATUSError as err: self.assertEqual(err.args[0], NT_STATUS_NOTIFY_CLEANUP) def test_notify_privileged_test(self): return self._test_notify_privileged_path(monitor_path=test_dir, rel_prefix="") def test_notify_privileged_root(self): return self._test_notify_privileged_path(monitor_path="", rel_prefix=test_dir) if __name__ == "__main__": import unittest unittest.main()
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