python/samba/netcmd/ntacl.py

   1 # Manipulate file NT ACLs
   2 #
   3 # Copyright Matthieu Patou 2010 <mat@matws.net>
   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
  19 from samba.credentials import DONT_USE_KERBEROS
  20 import samba.getopt as options
  21 from samba.dcerpc import security, idmap
  22 from samba.ntacls import setntacl, getntacl
  23 from samba import Ldb
  24 from samba.ndr import ndr_unpack, ndr_print
  25 from samba.samdb import SamDB
  26 from samba.samba3 import param as s3param, passdb, smbd
  27 from samba import provision
  28
  29 from ldb import SCOPE_BASE
  30 import os
  31
  32 from samba.auth import system_session
  33 from samba.netcmd import (
  34     Command,
  35     CommandError,
  36     SuperCommand,
  37     Option,
  38     )
  39
  40
  41
  42 class cmd_ntacl_set(Command):
  43     """Set ACLs on a file."""
  44
  45     synopsis = "%prog <acl> <file> [options]"
  46
  47     takes_optiongroups = {
  48         "sambaopts": options.SambaOptions,
  49         "credopts": options.CredentialsOptions,
  50         "versionopts": options.VersionOptions,
  51         }
  52
  53     takes_options = [
  54         Option("--quiet", help="Be quiet", action="store_true"),
  55         Option("--xattr-backend", type="choice", help="xattr backend type (native fs or tdb)",
  56                choices=["native","tdb"]),
  57         Option("--eadb-file", help="Name of the tdb file where attributes are stored", type="string"),
  58         Option("--use-ntvfs", help="Set the ACLs directly to the TDB or xattr for use with the ntvfs file server", action="store_true"),
  59         Option("--use-s3fs", help="Set the ACLs for use with the default s3fs file server via the VFS layer", action="store_true"),
  60         Option("--service", help="Name of the smb.conf service to use when applying the ACLs", type="string")
  61         ]
  62
  63     takes_args = ["acl","file"]
  64
  65     def run(self, acl, file, use_ntvfs=False, use_s3fs=False,
  66             quiet=False,xattr_backend=None,eadb_file=None,
  67             credopts=None, sambaopts=None, versionopts=None,
  68             service=None):
  69         logger = self.get_logger()
  70         lp = sambaopts.get_loadparm()
  71         try:
  72             samdb = SamDB(session_info=system_session(),
  73                           lp=lp)
  74         except Exception, e:
  75             raise CommandError("Unable to open samdb:", e)
  76
  77         if not use_ntvfs and not use_s3fs:
  78             use_ntvfs = "smb" in lp.get("server services")
  79         elif use_s3fs:
  80             use_ntvfs = False
  81
  82         try:
  83             domain_sid = security.dom_sid(samdb.domain_sid)
  84         except:
  85             raise CommandError("Unable to read domain SID from configuration files")
  86
  87         s3conf = s3param.get_context()
  88         s3conf.load(lp.configfile)
  89         # ensure we are using the right samba_dsdb passdb backend, no matter what
  90         s3conf.set("passdb backend", "samba_dsdb:%s" % samdb.url)
  91
  92         setntacl(lp, file, acl, str(domain_sid), xattr_backend, eadb_file, use_ntvfs=use_ntvfs, service=service)
  93
  94         if use_ntvfs:
  95             logger.warning("Please note that POSIX permissions have NOT been changed, only the stored NT ACL")
  96
  97
  98 class cmd_ntacl_get(Command):
  99     """Get ACLs of a file."""
 100     synopsis = "%prog <file> [options]"
 101
 102     takes_optiongroups = {
 103         "sambaopts": options.SambaOptions,
 104         "credopts": options.CredentialsOptions,
 105         "versionopts": options.VersionOptions,
 106         }
 107
 108     takes_options = [
 109         Option("--as-sddl", help="Output ACL in the SDDL format", action="store_true"),
 110         Option("--xattr-backend", type="choice", help="xattr backend type (native fs or tdb)",
 111                choices=["native","tdb"]),
 112         Option("--eadb-file", help="Name of the tdb file where attributes are stored", type="string"),
 113         Option("--use-ntvfs", help="Get the ACLs directly from the TDB or xattr used with the ntvfs file server", action="store_true"),
 114         Option("--use-s3fs", help="Get the ACLs for use via the VFS layer used by the default s3fs file server", action="store_true"),
 115         Option("--service", help="Name of the smb.conf service to use when getting the ACLs", type="string")
 116         ]
 117
 118     takes_args = ["file"]
 119
 120     def run(self, file, use_ntvfs=False, use_s3fs=False,
 121             as_sddl=False, xattr_backend=None, eadb_file=None,
 122             credopts=None, sambaopts=None, versionopts=None,
 123             service=None):
 124         lp = sambaopts.get_loadparm()
 125         try:
 126             samdb = SamDB(session_info=system_session(),
 127                           lp=lp)
 128         except Exception, e:
 129             raise CommandError("Unable to open samdb:", e)
 130
 131         if not use_ntvfs and not use_s3fs:
 132             use_ntvfs = "smb" in lp.get("server services")
 133         elif use_s3fs:
 134             use_ntvfs = False
 135
 136
 137         s3conf = s3param.get_context()
 138         s3conf.load(lp.configfile)
 139         # ensure we are using the right samba_dsdb passdb backend, no matter what
 140         s3conf.set("passdb backend", "samba_dsdb:%s" % samdb.url)
 141
 142         acl = getntacl(lp, file, xattr_backend, eadb_file, direct_db_access=use_ntvfs, service=service)
 143         if as_sddl:
 144             try:
 145                 domain_sid = security.dom_sid(samdb.domain_sid)
 146             except:
 147                 raise CommandError("Unable to read domain SID from configuration files")
 148             self.outf.write(acl.as_sddl(domain_sid)+"\n")
 149         else:
 150             self.outf.write(ndr_print(acl))
 151
 152
 153 class cmd_ntacl_sysvolreset(Command):
 154     """Reset sysvol ACLs to defaults (including correct ACLs on GPOs)."""
 155     synopsis = "%prog <file> [options]"
 156
 157     takes_optiongroups = {
 158         "sambaopts": options.SambaOptions,
 159         "credopts": options.CredentialsOptions,
 160         "versionopts": options.VersionOptions,
 161         }
 162
 163     takes_options = [
 164         Option("--use-ntvfs", help="Set the ACLs for use with the ntvfs file server", action="store_true"),
 165         Option("--use-s3fs", help="Set the ACLs for use with the default s3fs file server", action="store_true")
 166         ]
 167
 168     def run(self, use_ntvfs=False, use_s3fs=False,
 169             credopts=None, sambaopts=None, versionopts=None):
 170         lp = sambaopts.get_loadparm()
 171         path = lp.private_path("secrets.ldb")
 172         creds = credopts.get_credentials(lp)
 173         creds.set_kerberos_state(DONT_USE_KERBEROS)
 174         logger = self.get_logger()
 175
 176         netlogon = lp.get("path", "netlogon")
 177         sysvol = lp.get("path", "sysvol")
 178         try:
 179             samdb = SamDB(session_info=system_session(),
 180                           lp=lp)
 181         except Exception, e:
 182             raise CommandError("Unable to open samdb:", e)
 183
 184         if not use_ntvfs and not use_s3fs:
 185             use_ntvfs = "smb" in lp.get("server services")
 186         elif use_s3fs:
 187             use_ntvfs = False
 188
 189         domain_sid = security.dom_sid(samdb.domain_sid)
 190
 191         s3conf = s3param.get_context()
 192         s3conf.load(lp.configfile)
 193         # ensure we are using the right samba_dsdb passdb backend, no matter what
 194         s3conf.set("passdb backend", "samba_dsdb:%s" % samdb.url)
 195
 196         LA_sid = security.dom_sid(str(domain_sid)
 197                                   +"-"+str(security.DOMAIN_RID_ADMINISTRATOR))
 198         BA_sid = security.dom_sid(security.SID_BUILTIN_ADMINISTRATORS)
 199
 200         s4_passdb = passdb.PDB(s3conf.get("passdb backend"))
 201
 202         # These assertions correct for current plugin_s4_dc selftest
 203         # configuration.  When other environments have a broad range of
 204         # groups mapped via passdb, we can relax some of these checks
 205         (LA_uid,LA_type) = s4_passdb.sid_to_id(LA_sid)
 206         if (LA_type != idmap.ID_TYPE_UID and LA_type != idmap.ID_TYPE_BOTH):
 207             raise CommandError("SID %s is not mapped to a UID" % LA_sid)
 208         (BA_gid,BA_type) = s4_passdb.sid_to_id(BA_sid)
 209         if (BA_type != idmap.ID_TYPE_GID and BA_type != idmap.ID_TYPE_BOTH):
 210             raise CommandError("SID %s is not mapped to a GID" % BA_sid)
 211
 212         if use_ntvfs:
 213             logger.warning("Please note that POSIX permissions have NOT been changed, only the stored NT ACL")
 214
 215         provision.setsysvolacl(samdb, netlogon, sysvol,
 216                                LA_uid, BA_gid, domain_sid,
 217                                lp.get("realm").lower(), samdb.domain_dn(),
 218                                lp, use_ntvfs=use_ntvfs)
 219
 220 class cmd_ntacl_sysvolcheck(Command):
 221     """Check sysvol ACLs match defaults (including correct ACLs on GPOs)."""
 222     synopsis = "%prog <file> [options]"
 223
 224     takes_optiongroups = {
 225         "sambaopts": options.SambaOptions,
 226         "credopts": options.CredentialsOptions,
 227         "versionopts": options.VersionOptions,
 228         }
 229
 230     def run(self, credopts=None, sambaopts=None, versionopts=None):
 231         lp = sambaopts.get_loadparm()
 232         path = lp.private_path("secrets.ldb")
 233         creds = credopts.get_credentials(lp)
 234         creds.set_kerberos_state(DONT_USE_KERBEROS)
 235         logger = self.get_logger()
 236
 237         netlogon = lp.get("path", "netlogon")
 238         sysvol = lp.get("path", "sysvol")
 239         try:
 240             samdb = SamDB(session_info=system_session(), lp=lp)
 241         except Exception, e:
 242             raise CommandError("Unable to open samdb:", e)
 243
 244         domain_sid = security.dom_sid(samdb.domain_sid)
 245
 246         provision.checksysvolacl(samdb, netlogon, sysvol,
 247                                  domain_sid,
 248                                  lp.get("realm").lower(), samdb.domain_dn(),
 249                                  lp)
 250
 251
 252 class cmd_ntacl(SuperCommand):
 253     """NT ACLs manipulation."""
 254
 255     subcommands = {}
 256     subcommands["set"] = cmd_ntacl_set()
 257     subcommands["get"] = cmd_ntacl_get()
 258     subcommands["sysvolreset"] = cmd_ntacl_sysvolreset()
 259     subcommands["sysvolcheck"] = cmd_ntacl_sysvolcheck()
 260