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# Unix SMB/CIFS implementation.
# Copyright Volker Lendecke <vl@samba.org> 2022
#
# 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/>.
#
from samba.samba3 import libsmb_samba_internal as libsmb
from samba import (ntstatus,NTSTATUSError)
from samba.dcerpc import security as sec
from samba import reparse_symlink
import samba.tests.libsmb
class ReparsePoints(samba.tests.libsmb.LibsmbTests):
def connection(self):
share = samba.tests.env_get_var_value("SHARENAME")
smb1 = samba.tests.env_get_var_value("SMB1", allow_missing=True)
conn = libsmb.Conn(
self.server_ip,
share,
self.lp,
self.creds,
force_smb1=smb1)
return conn
def clean_file(self, conn, filename):
try:
conn.unlink(filename)
except NTSTATUSError as e:
err = e.args[0]
ok = (err == ntstatus.NT_STATUS_OBJECT_NAME_NOT_FOUND)
ok |= (err == ntstatus.NT_STATUS_OBJECT_PATH_NOT_FOUND)
ok |= (err == ntstatus.NT_STATUS_IO_REPARSE_TAG_NOT_HANDLED)
if not ok:
raise
def test_error_not_a_reparse_point(self):
conn = self.connection()
filename = 'reparse'
self.clean_file(conn, filename)
fd = conn.create(
filename,
DesiredAccess=sec.SEC_FILE_WRITE_ATTRIBUTE,
CreateDisposition=libsmb.FILE_CREATE)
with self.assertRaises(NTSTATUSError) as e:
conn.fsctl(fd, libsmb.FSCTL_GET_REPARSE_POINT, b'', 1024)
self.assertEqual(e.exception.args[0],
ntstatus.NT_STATUS_NOT_A_REPARSE_POINT)
conn.close(fd)
self.clean_file(conn, filename)
def test_create_reparse(self):
conn = self.connection()
filename = 'reparse'
self.clean_file(conn, filename)
fd = conn.create(
filename,
DesiredAccess=sec.SEC_FILE_WRITE_ATTRIBUTE,
CreateDisposition=libsmb.FILE_CREATE)
with self.assertRaises(NTSTATUSError) as e:
conn.fsctl(fd, libsmb.FSCTL_SET_REPARSE_POINT, b'', 0)
self.assertEqual(e.exception.args[0],
ntstatus.NT_STATUS_INVALID_BUFFER_SIZE)
for i in range(1,15):
with self.assertRaises(NTSTATUSError) as e:
conn.fsctl(fd, libsmb.FSCTL_SET_REPARSE_POINT, i * b'0', 0)
self.assertEqual(e.exception.args[0],
ntstatus.NT_STATUS_IO_REPARSE_DATA_INVALID)
# Create a syntactically valid [MS-FSCC] 2.1.2.2 REPARSE_DATA_BUFFER
b = reparse_symlink.put(0x80000025, 0, b'asdfasdfasdfasdfasdfasdf')
# Show that SET_REPARSE_POINT does exact length checks
with self.assertRaises(NTSTATUSError) as e:
conn.fsctl(fd, libsmb.FSCTL_SET_REPARSE_POINT, b + b'0', 0)
self.assertEqual(e.exception.args[0],
ntstatus.NT_STATUS_IO_REPARSE_DATA_INVALID)
with self.assertRaises(NTSTATUSError) as e:
conn.fsctl(fd, libsmb.FSCTL_SET_REPARSE_POINT, b[:-1], 0)
self.assertEqual(e.exception.args[0],
ntstatus.NT_STATUS_IO_REPARSE_DATA_INVALID)
conn.fsctl(fd, libsmb.FSCTL_SET_REPARSE_POINT, b, 0)
b = reparse_symlink.put(0x80000026, 0, b'asdfasdfasdfasdfasdfasdf')
conn.fsctl(fd, libsmb.FSCTL_SET_REPARSE_POINT, b, 0)
# Show that we can write to a reparse point when opened properly
def test_write_reparse(self):
conn = self.connection()
filename = 'reparse'
self.clean_file(conn, filename)
fd = conn.create(
filename,
DesiredAccess=sec.SEC_FILE_WRITE_ATTRIBUTE,
CreateDisposition=libsmb.FILE_CREATE)
b = reparse_symlink.put(0x80000025, 0, b'asdfasdfasdfasdfasdfasdf')
conn.fsctl(fd, libsmb.FSCTL_SET_REPARSE_POINT, b, 0)
conn.close(fd)
fd,cr,_ = conn.create_ex(
filename,
DesiredAccess=sec.SEC_FILE_WRITE_DATA|sec.SEC_STD_DELETE,
CreateOptions=libsmb.FILE_OPEN_REPARSE_POINT,
CreateDisposition=libsmb.FILE_OPEN)
self.assertEqual(
cr['file_attributes'] & libsmb.FILE_ATTRIBUTE_REPARSE_POINT,
libsmb.FILE_ATTRIBUTE_REPARSE_POINT)
conn.write(fd, b'x', 1)
conn.delete_on_close(fd, 1)
conn.close(fd)
# Show that directories can carry reparse points
def test_create_reparse_directory(self):
conn = self.connection()
dirname = "reparse_dir"
filename = f'{dirname}\\file.txt'
self.clean_file(conn, filename)
self.clean_file(conn, dirname)
dir_fd = conn.create(
dirname,
DesiredAccess=sec.SEC_FILE_WRITE_ATTRIBUTE|
sec.SEC_STD_DELETE,
CreateDisposition=libsmb.FILE_CREATE,
CreateOptions=libsmb.FILE_DIRECTORY_FILE)
b = reparse_symlink.put(0x80000025, 0, b'asdfasdfasdfasdfasdfasdf')
conn.fsctl(dir_fd, libsmb.FSCTL_SET_REPARSE_POINT, b, 0)
with self.assertRaises(NTSTATUSError) as e:
fd = conn.create(
filename,
DesiredAccess=sec.SEC_STD_DELETE,
CreateDisposition=libsmb.FILE_CREATE)
self.assertEqual(e.exception.args[0],
ntstatus.NT_STATUS_IO_REPARSE_TAG_NOT_HANDLED)
conn.delete_on_close(dir_fd, 1)
conn.close(dir_fd)
# Only empty directories can carry reparse points
def test_create_reparse_nonempty_directory(self):
conn = self.connection()
dirname = "reparse_dir"
filename = f'{dirname}\\file.txt'
self.clean_file(conn, filename)
self.clean_file(conn, dirname)
dir_fd = conn.create(
dirname,
DesiredAccess=sec.SEC_FILE_WRITE_ATTRIBUTE|
sec.SEC_STD_DELETE,
CreateDisposition=libsmb.FILE_CREATE,
CreateOptions=libsmb.FILE_DIRECTORY_FILE)
fd = conn.create(
filename,
DesiredAccess=sec.SEC_FILE_WRITE_ATTRIBUTE|
sec.SEC_STD_DELETE,
CreateDisposition=libsmb.FILE_CREATE)
b = reparse_symlink.put(0x80000025, 0, b'asdf')
try:
conn.fsctl(dir_fd, libsmb.FSCTL_SET_REPARSE_POINT, b, 0)
except NTSTATUSError as e:
err = e.args[0]
ok = (err == ntstatus.NT_STATUS_DIRECTORY_NOT_EMPTY)
if not ok:
raise
conn.delete_on_close(fd, 1)
conn.close(fd)
conn.delete_on_close(dir_fd, 1)
conn.close(dir_fd)
# Show that reparse point opens respect share modes
def test_reparse_share_modes(self):
conn = self.connection()
filename = 'reparse'
self.clean_file(conn, filename)
fd = conn.create(
filename,
DesiredAccess=sec.SEC_FILE_WRITE_ATTRIBUTE,
CreateDisposition=libsmb.FILE_CREATE)
b = reparse_symlink.put(0x80000025, 0, b'asdfasdfasdfasdfasdfasdf')
conn.fsctl(fd, libsmb.FSCTL_SET_REPARSE_POINT, b, 0)
conn.close(fd)
fd1 = conn.create(
filename,
DesiredAccess=sec.SEC_FILE_READ_DATA|sec.SEC_STD_DELETE,
CreateDisposition=libsmb.FILE_OPEN,
CreateOptions=libsmb.FILE_OPEN_REPARSE_POINT)
with self.assertRaises(NTSTATUSError) as e:
fd2 = conn.create(
filename,
DesiredAccess=sec.SEC_FILE_READ_DATA,
CreateDisposition=libsmb.FILE_OPEN,
CreateOptions=libsmb.FILE_OPEN_REPARSE_POINT)
self.assertEqual(e.exception.args[0],
ntstatus.NT_STATUS_SHARING_VIOLATION)
conn.delete_on_close(fd1, 1)
conn.close(fd1)
if __name__ == '__main__':
import unittest
unittest.main()
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