python/samba/ntacls.py

   1 # Unix SMB/CIFS implementation.
   2 # Copyright (C) Matthieu Patou <mat@matws.net> 2009-2010
   3 #
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 #
  18 """NT Acls."""
  19
  20
  21 import os
  22 import tempfile
  23 import shutil
  24
  25 import samba.xattr_native
  26 import samba.xattr_tdb
  27 import samba.posix_eadb
  28 from samba.samba3 import param as s3param
  29 from samba.dcerpc import security, xattr, idmap
  30 from samba.ndr import ndr_pack, ndr_unpack
  31 from samba.samba3 import smbd
  32 from samba.samba3 import libsmb_samba_internal as libsmb
  33 from samba.logger import get_samba_logger
  34 from samba import NTSTATUSError
  35 from samba.auth_util import system_session_unix
  36 from samba import safe_tarfile as tarfile
  37
  38
  39 # don't include volumes
  40 SMB_FILE_ATTRIBUTE_FLAGS = libsmb.FILE_ATTRIBUTE_SYSTEM | \
  41                            libsmb.FILE_ATTRIBUTE_DIRECTORY | \
  42                            libsmb.FILE_ATTRIBUTE_ARCHIVE | \
  43                            libsmb.FILE_ATTRIBUTE_HIDDEN
  44
  45
  46 SECURITY_SECINFO_FLAGS = security.SECINFO_OWNER | \
  47                          security.SECINFO_GROUP | \
  48                          security.SECINFO_DACL  | \
  49                          security.SECINFO_SACL
  50
  51 class XattrBackendError(Exception):
  52     """A generic xattr backend error."""
  53
  54
  55 def checkset_backend(lp, backend, eadbfile):
  56     '''return the path to the eadb, or None'''
  57     if backend is None:
  58         xattr_tdb = lp.get("xattr_tdb:file")
  59         if xattr_tdb is not None:
  60             return (samba.xattr_tdb, lp.get("xattr_tdb:file"))
  61         posix_eadb = lp.get("posix:eadb")
  62         if posix_eadb is not None:
  63             return (samba.posix_eadb, lp.get("posix:eadb"))
  64         return (None, None)
  65     elif backend == "native":
  66         return (None, None)
  67     elif backend == "eadb":
  68         if eadbfile is not None:
  69             return (samba.posix_eadb, eadbfile)
  70         else:
  71             return (samba.posix_eadb, os.path.abspath(os.path.join(lp.get("private dir"), "eadb.tdb")))
  72     elif backend == "tdb":
  73         if eadbfile is not None:
  74             return (samba.xattr_tdb, eadbfile)
  75         else:
  76             state_dir = lp.get("state directory")
  77             db_path = os.path.abspath(os.path.join(state_dir, "xattr.tdb"))
  78             return (samba.xattr_tdb, db_path)
  79     else:
  80         raise XattrBackendError("Invalid xattr backend choice %s" % backend)
  81
  82
  83 def getdosinfo(lp, file):
  84     try:
  85         attribute = samba.xattr_native.wrap_getxattr(file,
  86                                                      xattr.XATTR_DOSATTRIB_NAME_S3)
  87     except Exception:
  88         return
  89
  90     return ndr_unpack(xattr.DOSATTRIB, attribute)
  91
  92
  93 def getntacl(lp,
  94              file,
  95              session_info,
  96              backend=None,
  97              eadbfile=None,
  98              direct_db_access=True,
  99              service=None):
 100     if direct_db_access:
 101         (backend_obj, dbname) = checkset_backend(lp, backend, eadbfile)
 102         if dbname is not None:
 103             try:
 104                 attribute = backend_obj.wrap_getxattr(dbname, file,
 105                                                       xattr.XATTR_NTACL_NAME)
 106             except Exception:
 107                 # FIXME: Don't catch all exceptions, just those related to opening
 108                 # xattrdb
 109                 print("Fail to open %s" % dbname)
 110                 attribute = samba.xattr_native.wrap_getxattr(file,
 111                                                              xattr.XATTR_NTACL_NAME)
 112         else:
 113             attribute = samba.xattr_native.wrap_getxattr(file,
 114                                                          xattr.XATTR_NTACL_NAME)
 115         ntacl = ndr_unpack(xattr.NTACL, attribute)
 116         if ntacl.version == 1:
 117             return ntacl.info
 118         elif ntacl.version == 2:
 119             return ntacl.info.sd
 120         elif ntacl.version == 3:
 121             return ntacl.info.sd
 122         elif ntacl.version == 4:
 123             return ntacl.info.sd
 124     else:
 125         return smbd.get_nt_acl(file,
 126                                SECURITY_SECINFO_FLAGS,
 127                                session_info,
 128                                service=service)
 129
 130
 131 def setntacl(lp, file, sddl, domsid, session_info,
 132              backend=None, eadbfile=None,
 133              use_ntvfs=True, skip_invalid_chown=False,
 134              passdb=None, service=None):
 135     """
 136     A wrapper for smbd set_nt_acl api.
 137
 138     Args:
 139         lp (LoadParam): load param from conf
 140         file (str): a path to file or dir
 141         sddl (str): ntacl sddl string
 142         service (str): name of share service, e.g.: sysvol
 143         session_info (auth_session_info): session info for authentication
 144
 145     Note:
 146         Get `session_info` with `samba.auth.user_session`, do not use the
 147         `admin_session` api.
 148
 149     Returns:
 150         None
 151     """
 152
 153     assert(isinstance(domsid, str) or isinstance(domsid, security.dom_sid))
 154     if isinstance(domsid, str):
 155         sid = security.dom_sid(domsid)
 156     elif isinstance(domsid, security.dom_sid):
 157         sid = domsid
 158         domsid = str(sid)
 159
 160     assert(isinstance(sddl, str) or isinstance(sddl, security.descriptor))
 161     if isinstance(sddl, str):
 162         sd = security.descriptor.from_sddl(sddl, sid)
 163     elif isinstance(sddl, security.descriptor):
 164         sd = sddl
 165         sddl = sd.as_sddl(sid)
 166
 167     if not use_ntvfs and skip_invalid_chown:
 168         # Check if the owner can be resolved as a UID
 169         (owner_id, owner_type) = passdb.sid_to_id(sd.owner_sid)
 170         if ((owner_type != idmap.ID_TYPE_UID) and (owner_type != idmap.ID_TYPE_BOTH)):
 171             # Check if this particular owner SID was domain admins,
 172             # because we special-case this as mapping to
 173             # 'administrator' instead.
 174             if sd.owner_sid == security.dom_sid("%s-%d" % (domsid, security.DOMAIN_RID_ADMINS)):
 175                 administrator = security.dom_sid("%s-%d" % (domsid, security.DOMAIN_RID_ADMINISTRATOR))
 176                 (admin_id, admin_type) = passdb.sid_to_id(administrator)
 177
 178                 # Confirm we have a UID for administrator
 179                 if ((admin_type == idmap.ID_TYPE_UID) or (admin_type == idmap.ID_TYPE_BOTH)):
 180
 181                     # Set it, changing the owner to 'administrator' rather than domain admins
 182                     sd2 = sd
 183                     sd2.owner_sid = administrator
 184
 185                     smbd.set_nt_acl(
 186                         file, SECURITY_SECINFO_FLAGS, sd2,
 187                         session_info,
 188                         service=service)
 189
 190                     # and then set an NTVFS ACL (which does not set the posix ACL) to pretend the owner really was set
 191                     use_ntvfs = True
 192                 else:
 193                     raise XattrBackendError("Unable to find UID for domain administrator %s, got id %d of type %d" % (administrator, admin_id, admin_type))
 194             else:
 195                 # For all other owning users, reset the owner to root
 196                 # and then set the ACL without changing the owner
 197                 #
 198                 # This won't work in test environments, as it tries a real (rather than xattr-based fake) chown
 199
 200                 os.chown(file, 0, 0)
 201                 smbd.set_nt_acl(
 202                     file,
 203                     security.SECINFO_GROUP |
 204                     security.SECINFO_DACL |
 205                     security.SECINFO_SACL,
 206                     sd,
 207                     session_info,
 208                     service=service)
 209
 210     if use_ntvfs:
 211         (backend_obj, dbname) = checkset_backend(lp, backend, eadbfile)
 212         ntacl = xattr.NTACL()
 213         ntacl.version = 1
 214         ntacl.info = sd
 215         if dbname is not None:
 216             try:
 217                 backend_obj.wrap_setxattr(dbname,
 218                                           file, xattr.XATTR_NTACL_NAME, ndr_pack(ntacl))
 219             except Exception:
 220                 # FIXME: Don't catch all exceptions, just those related to opening
 221                 # xattrdb
 222                 print("Fail to open %s" % dbname)
 223                 samba.xattr_native.wrap_setxattr(file, xattr.XATTR_NTACL_NAME,
 224                                                  ndr_pack(ntacl))
 225         else:
 226             samba.xattr_native.wrap_setxattr(file, xattr.XATTR_NTACL_NAME,
 227                                              ndr_pack(ntacl))
 228     else:
 229         smbd.set_nt_acl(
 230             file, SECURITY_SECINFO_FLAGS, sd,
 231             service=service, session_info=session_info)
 232
 233
 234 def ldapmask2filemask(ldm):
 235     """Takes the access mask of a DS ACE and transform them in a File ACE mask.
 236     """
 237     RIGHT_DS_CREATE_CHILD     = 0x00000001
 238     RIGHT_DS_DELETE_CHILD     = 0x00000002
 239     RIGHT_DS_LIST_CONTENTS    = 0x00000004
 240     ACTRL_DS_SELF             = 0x00000008
 241     RIGHT_DS_READ_PROPERTY    = 0x00000010
 242     RIGHT_DS_WRITE_PROPERTY   = 0x00000020
 243     RIGHT_DS_DELETE_TREE      = 0x00000040
 244     RIGHT_DS_LIST_OBJECT      = 0x00000080
 245     RIGHT_DS_CONTROL_ACCESS   = 0x00000100
 246     FILE_READ_DATA            = 0x0001
 247     FILE_LIST_DIRECTORY       = 0x0001
 248     FILE_WRITE_DATA           = 0x0002
 249     FILE_ADD_FILE             = 0x0002
 250     FILE_APPEND_DATA          = 0x0004
 251     FILE_ADD_SUBDIRECTORY     = 0x0004
 252     FILE_CREATE_PIPE_INSTANCE = 0x0004
 253     FILE_READ_EA              = 0x0008
 254     FILE_WRITE_EA             = 0x0010
 255     FILE_EXECUTE              = 0x0020
 256     FILE_TRAVERSE             = 0x0020
 257     FILE_DELETE_CHILD         = 0x0040
 258     FILE_READ_ATTRIBUTES      = 0x0080
 259     FILE_WRITE_ATTRIBUTES     = 0x0100
 260     DELETE                    = 0x00010000
 261     READ_CONTROL              = 0x00020000
 262     WRITE_DAC                 = 0x00040000
 263     WRITE_OWNER               = 0x00080000
 264     SYNCHRONIZE               = 0x00100000
 265     STANDARD_RIGHTS_ALL       = 0x001F0000
 266
 267     filemask = ldm & STANDARD_RIGHTS_ALL
 268
 269     if (ldm & RIGHT_DS_READ_PROPERTY) and (ldm & RIGHT_DS_LIST_CONTENTS):
 270         filemask = filemask | (SYNCHRONIZE | FILE_LIST_DIRECTORY |
 271                                FILE_READ_ATTRIBUTES | FILE_READ_EA |
 272                                FILE_READ_DATA | FILE_EXECUTE)
 273
 274     if ldm & RIGHT_DS_WRITE_PROPERTY:
 275         filemask = filemask | (SYNCHRONIZE | FILE_WRITE_DATA |
 276                                FILE_APPEND_DATA | FILE_WRITE_EA |
 277                                FILE_WRITE_ATTRIBUTES | FILE_ADD_FILE |
 278                                FILE_ADD_SUBDIRECTORY)
 279
 280     if ldm & RIGHT_DS_CREATE_CHILD:
 281         filemask = filemask | (FILE_ADD_SUBDIRECTORY | FILE_ADD_FILE)
 282
 283     if ldm & RIGHT_DS_DELETE_CHILD:
 284         filemask = filemask | FILE_DELETE_CHILD
 285
 286     return filemask
 287
 288
 289 def dsacl2fsacl(dssddl, sid, as_sddl=True):
 290     """
 291
 292     This function takes an the SDDL representation of a DS
 293     ACL and return the SDDL representation of this ACL adapted
 294     for files. It's used for Policy object provision
 295     """
 296     ref = security.descriptor.from_sddl(dssddl, sid)
 297     fdescr = security.descriptor()
 298     fdescr.owner_sid = ref.owner_sid
 299     fdescr.group_sid = ref.group_sid
 300     fdescr.type = ref.type
 301     fdescr.revision = ref.revision
 302     aces = ref.dacl.aces
 303     for i in range(0, len(aces)):
 304         ace = aces[i]
 305         if ace.type in (security.SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT,
 306                         security.SEC_ACE_TYPE_ACCESS_ALLOWED) and str(ace.trustee) != security.SID_BUILTIN_PREW2K:
 307            #    if fdescr.type & security.SEC_DESC_DACL_AUTO_INHERITED:
 308             ace.flags = ace.flags | security.SEC_ACE_FLAG_OBJECT_INHERIT | security.SEC_ACE_FLAG_CONTAINER_INHERIT
 309             if str(ace.trustee) == security.SID_CREATOR_OWNER:
 310                 # For Creator/Owner the IO flag is set as this ACE has only a sense for child objects
 311                 ace.flags = ace.flags | security.SEC_ACE_FLAG_INHERIT_ONLY
 312             ace.access_mask = ldapmask2filemask(ace.access_mask)
 313             fdescr.dacl_add(ace)
 314
 315     if not as_sddl:
 316         return fdescr
 317
 318     return fdescr.as_sddl(sid)
 319
 320
 321 class SMBHelper:
 322     """
 323     A wrapper class for SMB connection
 324
 325     smb_path: path with separator "\\" other than "/"
 326     """
 327
 328     def __init__(self, smb_conn, dom_sid):
 329         self.smb_conn = smb_conn
 330         self.dom_sid = dom_sid
 331
 332     def get_acl(self, smb_path, as_sddl=False,
 333                 sinfo=None, access_mask=None):
 334         assert '/' not in smb_path
 335
 336         ntacl_sd = self.smb_conn.get_acl(smb_path,
 337                                          sinfo=sinfo,
 338                                          access_mask=access_mask)
 339
 340         return ntacl_sd.as_sddl(self.dom_sid) if as_sddl else ntacl_sd
 341
 342     def set_acl(self, smb_path, ntacl_sd,
 343                 sinfo=None, access_mask=None):
 344         assert '/' not in smb_path
 345
 346         assert(isinstance(ntacl_sd, str) or isinstance(ntacl_sd, security.descriptor))
 347         if isinstance(ntacl_sd, str):
 348             tmp_desc = security.descriptor.from_sddl(ntacl_sd, self.domain_sid)
 349         elif isinstance(ntacl_sd, security.descriptor):
 350             tmp_desc = ntacl_sd
 351
 352         self.smb_conn.set_acl(smb_path, tmp_desc,
 353                               sinfo=sinfo,
 354                               access_mask=access_mask)
 355
 356     def list(self, smb_path=''):
 357         """
 358         List file and dir base names in smb_path without recursive.
 359         """
 360         assert '/' not in smb_path
 361         return self.smb_conn.list(smb_path, attribs=SMB_FILE_ATTRIBUTE_FLAGS)
 362
 363     def is_dir(self, attrib):
 364         """
 365         Check whether the attrib value is a directory.
 366
 367         attrib is from list method.
 368         """
 369         return bool(attrib & libsmb.FILE_ATTRIBUTE_DIRECTORY)
 370
 371     def join(self, root, name):
 372         """
 373         Join path with '\\'
 374         """
 375         return root + '\\' + name if root else name
 376
 377     def loadfile(self, smb_path):
 378         assert '/' not in smb_path
 379         return self.smb_conn.loadfile(smb_path)
 380
 381     def create_tree(self, tree, smb_path=''):
 382         """
 383         Create files as defined in tree
 384         """
 385         for name, content in tree.items():
 386             fullname = self.join(smb_path, name)
 387             if isinstance(content, dict):  # a dir
 388                 if not self.smb_conn.chkpath(fullname):
 389                     self.smb_conn.mkdir(fullname)
 390                 self.create_tree(content, smb_path=fullname)
 391             else:  # a file
 392                 self.smb_conn.savefile(fullname, content)
 393
 394     def get_tree(self, smb_path=''):
 395         """
 396         Get the tree structure via smb conn
 397
 398         self.smb_conn.list example:
 399
 400         [
 401           {
 402             'attrib': 16,
 403             'mtime': 1528848309,
 404             'name': 'dir1',
 405             'short_name': 'dir1',
 406             'size': 0L
 407           }, {
 408             'attrib': 32,
 409             'mtime': 1528848309,
 410             'name': 'file0.txt',
 411             'short_name': 'file0.txt',
 412             'size': 10L
 413           }
 414         ]
 415         """
 416         tree = {}
 417         for item in self.list(smb_path):
 418             name = item['name']
 419             fullname = self.join(smb_path, name)
 420             if self.is_dir(item['attrib']):
 421                 tree[name] = self.get_tree(smb_path=fullname)
 422             else:
 423                 tree[name] = self.loadfile(fullname)
 424         return tree
 425
 426     def get_ntacls(self, smb_path=''):
 427         """
 428         Get ntacl for each file and dir via smb conn
 429         """
 430         ntacls = {}
 431         for item in self.list(smb_path):
 432             name = item['name']
 433             fullname = self.join(smb_path, name)
 434             if self.is_dir(item['attrib']):
 435                 ntacls.update(self.get_ntacls(smb_path=fullname))
 436             else:
 437                 ntacl_sd = self.get_acl(fullname)
 438                 ntacls[fullname] = ntacl_sd.as_sddl(self.dom_sid)
 439         return ntacls
 440
 441     def delete_tree(self):
 442         for item in self.list():
 443             name = item['name']
 444             if self.is_dir(item['attrib']):
 445                 self.smb_conn.deltree(name)
 446             else:
 447                 self.smb_conn.unlink(name)
 448
 449
 450 class NtaclsHelper:
 451
 452     def __init__(self, service, smb_conf_path, dom_sid):
 453         self.service = service
 454         self.dom_sid = dom_sid
 455
 456         # this is important to help smbd find services.
 457         self.lp = s3param.get_context()
 458         self.lp.load(smb_conf_path)
 459
 460         self.use_ntvfs = "smb" in self.lp.get("server services")
 461
 462     def getntacl(self, path, session_info, as_sddl=False, direct_db_access=None):
 463         if direct_db_access is None:
 464             direct_db_access = self.use_ntvfs
 465
 466         ntacl_sd = getntacl(
 467             self.lp, path, session_info,
 468             direct_db_access=direct_db_access,
 469             service=self.service)
 470
 471         return ntacl_sd.as_sddl(self.dom_sid) if as_sddl else ntacl_sd
 472
 473     def setntacl(self, path, ntacl_sd, session_info):
 474         # ntacl_sd can be obj or str
 475         return setntacl(self.lp, path, ntacl_sd, self.dom_sid, session_info,
 476                         use_ntvfs=self.use_ntvfs)
 477
 478
 479 def _create_ntacl_file(dst, ntacl_sddl_str):
 480     with open(dst + '.NTACL', 'w') as f:
 481         f.write(ntacl_sddl_str)
 482
 483
 484 def _read_ntacl_file(src):
 485     ntacl_file = src + '.NTACL'
 486
 487     if not os.path.exists(ntacl_file):
 488         return None
 489
 490     with open(ntacl_file, 'r') as f:
 491         return f.read()
 492
 493
 494 def backup_online(smb_conn, dest_tarfile_path, dom_sid):
 495     """
 496     Backup all files and dirs with ntacl for the serive behind smb_conn.
 497
 498     1. Create a temp dir as container dir
 499     2. Backup all files with dir structure into container dir
 500     3. Generate file.NTACL files for each file and dir in container dir
 501     4. Create a tar file from container dir(without top level folder)
 502     5. Delete container dir
 503     """
 504
 505     logger = get_samba_logger()
 506
 507     if isinstance(dom_sid, str):
 508         dom_sid = security.dom_sid(dom_sid)
 509
 510     smb_helper = SMBHelper(smb_conn, dom_sid)
 511
 512     remotedir = ''  # root dir
 513
 514     localdir = tempfile.mkdtemp()
 515
 516     r_dirs = [remotedir]
 517     l_dirs = [localdir]
 518
 519     while r_dirs:
 520         r_dir = r_dirs.pop()
 521         l_dir = l_dirs.pop()
 522
 523         for e in smb_helper.list(smb_path=r_dir):
 524             r_name = smb_helper.join(r_dir, e['name'])
 525             l_name = os.path.join(l_dir, e['name'])
 526
 527             if smb_helper.is_dir(e['attrib']):
 528                 r_dirs.append(r_name)
 529                 l_dirs.append(l_name)
 530                 os.mkdir(l_name)
 531             else:
 532                 data = smb_helper.loadfile(r_name)
 533                 with open(l_name, 'wb') as f:
 534                     f.write(data)
 535
 536             # get ntacl for this entry and save alongside
 537             try:
 538                 ntacl_sddl_str = smb_helper.get_acl(r_name, as_sddl=True)
 539                 _create_ntacl_file(l_name, ntacl_sddl_str)
 540             except NTSTATUSError as e:
 541                 logger.error('Failed to get the ntacl for %s: %s' % \
 542                              (r_name, e.args[1]))
 543                 logger.warning('The permissions for %s may not be' % r_name +
 544                                ' restored correctly')
 545
 546     with tarfile.open(name=dest_tarfile_path, mode='w:gz') as tar:
 547         for name in os.listdir(localdir):
 548             path = os.path.join(localdir, name)
 549             tar.add(path, arcname=name)
 550
 551     shutil.rmtree(localdir)
 552
 553
 554 def backup_offline(src_service_path, dest_tarfile_path, smb_conf_path, dom_sid):
 555     """
 556     Backup files and ntacls to a tarfile for a service
 557     """
 558     service = src_service_path.rstrip('/').rsplit('/', 1)[-1]
 559     tempdir = tempfile.mkdtemp()
 560     session_info = system_session_unix()
 561
 562     ntacls_helper = NtaclsHelper(service, smb_conf_path, dom_sid)
 563
 564     for dirpath, dirnames, filenames in os.walk(src_service_path):
 565         # each dir only cares about its direct children
 566         rel_dirpath = os.path.relpath(dirpath, start=src_service_path)
 567         dst_dirpath = os.path.join(tempdir, rel_dirpath)
 568
 569         # create sub dirs and NTACL file
 570         for dirname in dirnames:
 571             src = os.path.join(dirpath, dirname)
 572             dst = os.path.join(dst_dirpath, dirname)
 573             # mkdir with metadata
 574             smbd.mkdir(dst, session_info, service)
 575             ntacl_sddl_str = ntacls_helper.getntacl(src, session_info, as_sddl=True)
 576             _create_ntacl_file(dst, ntacl_sddl_str)
 577
 578         # create files and NTACL file, then copy data
 579         for filename in filenames:
 580             src = os.path.join(dirpath, filename)
 581             dst = os.path.join(dst_dirpath, filename)
 582             # create an empty file with metadata
 583             smbd.create_file(dst, session_info, service)
 584             ntacl_sddl_str = ntacls_helper.getntacl(src, session_info, as_sddl=True)
 585             _create_ntacl_file(dst, ntacl_sddl_str)
 586
 587             # now put data in
 588             with open(src, 'rb') as src_file:
 589                 data = src_file.read()
 590                 with open(dst, 'wb') as dst_file:
 591                     dst_file.write(data)
 592
 593     # add all files in tempdir to tarfile without a top folder
 594     with tarfile.open(name=dest_tarfile_path, mode='w:gz') as tar:
 595         for name in os.listdir(tempdir):
 596             path = os.path.join(tempdir, name)
 597             tar.add(path, arcname=name)
 598
 599     shutil.rmtree(tempdir)
 600
 601
 602 def backup_restore(src_tarfile_path, dst_service_path, samdb_conn, smb_conf_path):
 603     """
 604     Restore files and ntacls from a tarfile to a service
 605     """
 606     logger = get_samba_logger()
 607     service = dst_service_path.rstrip('/').rsplit('/', 1)[-1]
 608     tempdir = tempfile.mkdtemp()  # src files
 609
 610     dom_sid_str = samdb_conn.get_domain_sid()
 611     dom_sid = security.dom_sid(dom_sid_str)
 612
 613     ntacls_helper = NtaclsHelper(service, smb_conf_path, dom_sid)
 614     session_info = system_session_unix()
 615
 616     with tarfile.open(src_tarfile_path) as f:
 617         f.extractall(path=tempdir)
 618         # e.g.: /tmp/tmpRNystY/{dir1,dir1.NTACL,...file1,file1.NTACL}
 619
 620     for dirpath, dirnames, filenames in os.walk(tempdir):
 621         rel_dirpath = os.path.relpath(dirpath, start=tempdir)
 622         dst_dirpath = os.path.normpath(
 623             os.path.join(dst_service_path, rel_dirpath))
 624
 625         for dirname in dirnames:
 626             if not dirname.endswith('.NTACL'):
 627                 src = os.path.join(dirpath, dirname)
 628                 dst = os.path.join(dst_dirpath, dirname)
 629                 if not os.path.isdir(dst):
 630                     # dst must be absolute path for smbd API
 631                     smbd.mkdir(dst, session_info, service)
 632
 633                 ntacl_sddl_str = _read_ntacl_file(src)
 634                 if ntacl_sddl_str:
 635                     ntacls_helper.setntacl(dst, ntacl_sddl_str, session_info)
 636                 else:
 637                     logger.warning(
 638                         'Failed to restore ntacl for directory %s.' % dst
 639                         + ' Please check the permissions are correct')
 640
 641         for filename in filenames:
 642             if not filename.endswith('.NTACL'):
 643                 src = os.path.join(dirpath, filename)
 644                 dst = os.path.join(dst_dirpath, filename)
 645                 if not os.path.isfile(dst):
 646                     # dst must be absolute path for smbd API
 647                     smbd.create_file(dst, session_info, service)
 648
 649                 ntacl_sddl_str = _read_ntacl_file(src)
 650                 if ntacl_sddl_str:
 651                     ntacls_helper.setntacl(dst, ntacl_sddl_str, session_info)
 652                 else:
 653                     logger.warning('Failed to restore ntacl for file %s.' % dst
 654                                  + ' Please check the permissions are correct')
 655
 656                 # now put data in
 657                 with open(src, 'rb') as src_file:
 658                     data = src_file.read()
 659                     with open(dst, 'wb') as dst_file:
 660                         dst_file.write(data)
 661
 662     shutil.rmtree(tempdir)