--- /dev/null
+# Unix SMB/CIFS implementation.
+# Copyright (C) Matthieu Patou <mat@matws.net> 2009-2010
+#
+#
+# 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/>.
+#
+
+"""NT Acls."""
+
+
+import os
+import samba.xattr_native, samba.xattr_tdb, samba.posix_eadb
+from samba.dcerpc import security, xattr, idmap
+from samba.ndr import ndr_pack, ndr_unpack
+from samba.samba3 import smbd
+
+class XattrBackendError(Exception):
+ """A generic xattr backend error."""
+
+
+def checkset_backend(lp, backend, eadbfile):
+ '''return the path to the eadb, or None'''
+ if backend is None:
+ xattr_tdb = lp.get("xattr_tdb:file")
+ if xattr_tdb is not None:
+ return (samba.xattr_tdb, lp.get("xattr_tdb:file"))
+ posix_eadb = lp.get("posix:eadb")
+ if posix_eadb is not None:
+ return (samba.posix_eadb, lp.get("posix:eadb"))
+ return (None, None)
+ elif backend == "native":
+ return (None, None)
+ elif backend == "eadb":
+ if eadbfile is not None:
+ return (samba.posix_eadb, eadbfile)
+ else:
+ return (samba.posix_eadb, os.path.abspath(os.path.join(lp.get("private dir"), "eadb.tdb")))
+ elif backend == "tdb":
+ if eadbfile is not None:
+ return (samba.xattr_tdb, eadbfile)
+ else:
+ return (samba.xattr_tdb, os.path.abspath(os.path.join(lp.get("state dir"), "xattr.tdb")))
+ else:
+ raise XattrBackendError("Invalid xattr backend choice %s"%backend)
+
+
+def getntacl(lp, file, backend=None, eadbfile=None, direct_db_access=True, service=None):
+ if direct_db_access:
+ (backend_obj, dbname) = checkset_backend(lp, backend, eadbfile)
+ if dbname is not None:
+ try:
+ attribute = backend_obj.wrap_getxattr(dbname, file,
+ xattr.XATTR_NTACL_NAME)
+ except Exception:
+ # FIXME: Don't catch all exceptions, just those related to opening
+ # xattrdb
+ print "Fail to open %s" % dbname
+ attribute = samba.xattr_native.wrap_getxattr(file,
+ xattr.XATTR_NTACL_NAME)
+ else:
+ attribute = samba.xattr_native.wrap_getxattr(file,
+ xattr.XATTR_NTACL_NAME)
+ ntacl = ndr_unpack(xattr.NTACL, attribute)
+ if ntacl.version == 1:
+ return ntacl.info
+ elif ntacl.version == 2:
+ return ntacl.info.sd
+ elif ntacl.version == 3:
+ return ntacl.info.sd
+ elif ntacl.version == 4:
+ return ntacl.info.sd
+ else:
+ return smbd.get_nt_acl(file, security.SECINFO_OWNER | security.SECINFO_GROUP | security.SECINFO_DACL | security.SECINFO_SACL, service=service)
+
+
+def setntacl(lp, file, sddl, domsid, backend=None, eadbfile=None, use_ntvfs=True, skip_invalid_chown=False, passdb=None, service=None):
+ assert(isinstance(domsid, str) or isinstance(domsid, security.dom_sid))
+ if isinstance(domsid, str):
+ sid = security.dom_sid(domsid)
+ elif isinstance(domsid, security.dom_sid):
+ sid = domsid
+ domsid = str(sid)
+
+ assert(isinstance(sddl, str) or isinstance(sddl, security.descriptor))
+ if isinstance(sddl, str):
+ sd = security.descriptor.from_sddl(sddl, sid)
+ elif isinstance(sddl, security.descriptor):
+ sd = sddl
+ sddl = sd.as_sddl(sid)
+
+ if not use_ntvfs and skip_invalid_chown:
+ # Check if the owner can be resolved as a UID
+ (owner_id, owner_type) = passdb.sid_to_id(sd.owner_sid)
+ if ((owner_type != idmap.ID_TYPE_UID) and (owner_type != idmap.ID_TYPE_BOTH)):
+ # Check if this particular owner SID was domain admins,
+ # because we special-case this as mapping to
+ # 'administrator' instead.
+ if sd.owner_sid == security.dom_sid("%s-%d" % (domsid, security.DOMAIN_RID_ADMINS)):
+ administrator = security.dom_sid("%s-%d" % (domsid, security.DOMAIN_RID_ADMINISTRATOR))
+ (admin_id, admin_type) = passdb.sid_to_id(administrator)
+
+ # Confirm we have a UID for administrator
+ if ((admin_type == idmap.ID_TYPE_UID) or (admin_type == idmap.ID_TYPE_BOTH)):
+
+ # Set it, changing the owner to 'administrator' rather than domain admins
+ sd2 = sd
+ sd2.owner_sid = administrator
+
+ smbd.set_nt_acl(file, security.SECINFO_OWNER |security.SECINFO_GROUP | security.SECINFO_DACL | security.SECINFO_SACL, sd2, service=service)
+
+ # and then set an NTVFS ACL (which does not set the posix ACL) to pretend the owner really was set
+ use_ntvfs = True
+ else:
+ raise XattrBackendError("Unable to find UID for domain administrator %s, got id %d of type %d" % (administrator, admin_id, admin_type))
+ else:
+ # For all other owning users, reset the owner to root
+ # and then set the ACL without changing the owner
+ #
+ # This won't work in test environments, as it tries a real (rather than xattr-based fake) chown
+
+ os.chown(file, 0, 0)
+ smbd.set_nt_acl(file, security.SECINFO_GROUP | security.SECINFO_DACL | security.SECINFO_SACL, sd, service=service)
+
+ if use_ntvfs:
+ (backend_obj, dbname) = checkset_backend(lp, backend, eadbfile)
+ ntacl = xattr.NTACL()
+ ntacl.version = 1
+ ntacl.info = sd
+ if dbname is not None:
+ try:
+ backend_obj.wrap_setxattr(dbname,
+ file, xattr.XATTR_NTACL_NAME, ndr_pack(ntacl))
+ except Exception:
+ # FIXME: Don't catch all exceptions, just those related to opening
+ # xattrdb
+ print "Fail to open %s" % dbname
+ samba.xattr_native.wrap_setxattr(file, xattr.XATTR_NTACL_NAME,
+ ndr_pack(ntacl))
+ else:
+ samba.xattr_native.wrap_setxattr(file, xattr.XATTR_NTACL_NAME,
+ ndr_pack(ntacl))
+ else:
+ smbd.set_nt_acl(file, security.SECINFO_OWNER | security.SECINFO_GROUP | security.SECINFO_DACL | security.SECINFO_SACL, sd, service=service)
+
+
+def ldapmask2filemask(ldm):
+ """Takes the access mask of a DS ACE and transform them in a File ACE mask.
+ """
+ RIGHT_DS_CREATE_CHILD = 0x00000001
+ RIGHT_DS_DELETE_CHILD = 0x00000002
+ RIGHT_DS_LIST_CONTENTS = 0x00000004
+ ACTRL_DS_SELF = 0x00000008
+ RIGHT_DS_READ_PROPERTY = 0x00000010
+ RIGHT_DS_WRITE_PROPERTY = 0x00000020
+ RIGHT_DS_DELETE_TREE = 0x00000040
+ RIGHT_DS_LIST_OBJECT = 0x00000080
+ RIGHT_DS_CONTROL_ACCESS = 0x00000100
+ FILE_READ_DATA = 0x0001
+ FILE_LIST_DIRECTORY = 0x0001
+ FILE_WRITE_DATA = 0x0002
+ FILE_ADD_FILE = 0x0002
+ FILE_APPEND_DATA = 0x0004
+ FILE_ADD_SUBDIRECTORY = 0x0004
+ FILE_CREATE_PIPE_INSTANCE = 0x0004
+ FILE_READ_EA = 0x0008
+ FILE_WRITE_EA = 0x0010
+ FILE_EXECUTE = 0x0020
+ FILE_TRAVERSE = 0x0020
+ FILE_DELETE_CHILD = 0x0040
+ FILE_READ_ATTRIBUTES = 0x0080
+ FILE_WRITE_ATTRIBUTES = 0x0100
+ DELETE = 0x00010000
+ READ_CONTROL = 0x00020000
+ WRITE_DAC = 0x00040000
+ WRITE_OWNER = 0x00080000
+ SYNCHRONIZE = 0x00100000
+ STANDARD_RIGHTS_ALL = 0x001F0000
+
+ filemask = ldm & STANDARD_RIGHTS_ALL
+
+ if (ldm & RIGHT_DS_READ_PROPERTY) and (ldm & RIGHT_DS_LIST_CONTENTS):
+ filemask = filemask | (SYNCHRONIZE | FILE_LIST_DIRECTORY |
+ FILE_READ_ATTRIBUTES | FILE_READ_EA |
+ FILE_READ_DATA | FILE_EXECUTE)
+
+ if ldm & RIGHT_DS_WRITE_PROPERTY:
+ filemask = filemask | (SYNCHRONIZE | FILE_WRITE_DATA |
+ FILE_APPEND_DATA | FILE_WRITE_EA |
+ FILE_WRITE_ATTRIBUTES | FILE_ADD_FILE |
+ FILE_ADD_SUBDIRECTORY)
+
+ if ldm & RIGHT_DS_CREATE_CHILD:
+ filemask = filemask | (FILE_ADD_SUBDIRECTORY | FILE_ADD_FILE)
+
+ if ldm & RIGHT_DS_DELETE_CHILD:
+ filemask = filemask | FILE_DELETE_CHILD
+
+ return filemask
+
+
+def dsacl2fsacl(dssddl, sid, as_sddl=True):
+ """
+
+ This function takes an the SDDL representation of a DS
+ ACL and return the SDDL representation of this ACL adapted
+ for files. It's used for Policy object provision
+ """
+ ref = security.descriptor.from_sddl(dssddl, sid)
+ fdescr = security.descriptor()
+ fdescr.owner_sid = ref.owner_sid
+ fdescr.group_sid = ref.group_sid
+ fdescr.type = ref.type
+ fdescr.revision = ref.revision
+ aces = ref.dacl.aces
+ for i in range(0, len(aces)):
+ ace = aces[i]
+ if not ace.type & security.SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT and str(ace.trustee) != security.SID_BUILTIN_PREW2K:
+ # if fdescr.type & security.SEC_DESC_DACL_AUTO_INHERITED:
+ ace.flags = ace.flags | security.SEC_ACE_FLAG_OBJECT_INHERIT | security.SEC_ACE_FLAG_CONTAINER_INHERIT
+ if str(ace.trustee) == security.SID_CREATOR_OWNER:
+ # For Creator/Owner the IO flag is set as this ACE has only a sense for child objects
+ ace.flags = ace.flags | security.SEC_ACE_FLAG_INHERIT_ONLY
+ ace.access_mask = ldapmask2filemask(ace.access_mask)
+ fdescr.dacl_add(ace)
+
+ if not as_sddl:
+ return fdescr
+
+ return fdescr.as_sddl(sid)
git.samba.org / nivanova / samba-autobuild / .git / blobdiff