3 # Unix SMB/CIFS implementation.
4 # Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007-2008
6 # Based on the original in EJS:
7 # Copyright (C) Andrew Tridgell <tridge@samba.org> 2005
9 # This program is free software; you can redistribute it and/or modify
10 # it under the terms of the GNU General Public License as published by
11 # the Free Software Foundation; either version 3 of the License, or
12 # (at your option) any later version.
14 # This program is distributed in the hope that it will be useful,
15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 # GNU General Public License for more details.
19 # You should have received a copy of the GNU General Public License
20 # along with this program. If not, see <http://www.gnu.org/licenses/>.
25 __docformat__ = "restructuredText"
30 def _in_source_tree():
31 """Check whether the script is being run from the source dir. """
32 return os.path.exists("%s/../../../selftest/skip" % os.path.dirname(__file__))
35 # When running, in-tree, make sure bin/python is in the PYTHONPATH
37 srcdir = "%s/../../.." % os.path.dirname(__file__)
38 sys.path.append("%s/bin/python" % srcdir)
39 default_ldb_modules_dir = "%s/bin/modules/ldb" % srcdir
41 default_ldb_modules_dir = None
47 from samba._ldb import Ldb as _Ldb
50 """Simple Samba-specific LDB subclass that takes care
51 of setting up the modules dir, credentials pointers, etc.
53 Please note that this is intended to be for all Samba LDB files,
54 not necessarily the Sam database. For Sam-specific helper
55 functions see samdb.py.
57 def __init__(self, url=None, lp=None, modules_dir=None, session_info=None,
58 credentials=None, flags=0, options=None):
59 """Opens a Samba Ldb file.
61 :param url: Optional LDB URL to open
62 :param lp: Optional loadparm object
63 :param modules_dir: Optional modules directory
64 :param session_info: Optional session information
65 :param credentials: Optional credentials, defaults to anonymous.
66 :param flags: Optional LDB flags
67 :param options: Additional options (optional)
69 This is different from a regular Ldb file in that the Samba-specific
70 modules-dir is used by default and that credentials and session_info
71 can be passed through (required by some modules).
74 if modules_dir is not None:
75 self.set_modules_dir(modules_dir)
76 elif default_ldb_modules_dir is not None:
77 self.set_modules_dir(default_ldb_modules_dir)
79 self.set_modules_dir(os.path.join(lp.get("modules dir"), "ldb"))
81 if session_info is not None:
82 self.set_session_info(session_info)
84 if credentials is not None:
85 self.set_credentials(credentials)
90 # This must be done before we load the schema, as these handlers for
91 # objectSid and objectGUID etc must take precedence over the 'binary
92 # attribute' declaration in the schema
93 self.register_samba_handlers()
100 self.set_utf8_casefold()
102 # Allow admins to force non-sync ldb for all databases
104 nosync_p = lp.get("nosync", "ldb")
105 if nosync_p is not None and nosync_p == True:
106 flags |= ldb.FLG_NOSYNC
108 self.set_create_perms(0600)
111 self.connect(url, flags, options)
113 def set_create_perms(self, perms=0600):
114 # we usually want Samba databases to be private. If we later find we
115 # need one public, we will have to change this here
116 super(Ldb, self).set_create_perms(perms)
118 def searchone(self, attribute, basedn=None, expression=None,
119 scope=ldb.SCOPE_BASE):
120 """Search for one attribute as a string.
122 :param basedn: BaseDN for the search.
123 :param attribute: Name of the attribute
124 :param expression: Optional search expression.
125 :param scope: Search scope (defaults to base).
126 :return: Value of attribute as a string or None if it wasn't found.
128 res = self.search(basedn, scope, expression, [attribute])
129 if len(res) != 1 or res[0][attribute] is None:
131 values = set(res[0][attribute])
132 assert len(values) == 1
133 return self.schema_format_value(attribute, values.pop())
135 def erase_users_computers(self, dn):
136 """Erases user and computer objects from our AD. This is needed since the 'samldb' module denies the deletion of primary groups. Therefore all groups shouldn't be primary somewhere anymore."""
139 res = self.search(base=dn, scope=ldb.SCOPE_SUBTREE, attrs=[],
140 expression="(|(objectclass=user)(objectclass=computer))")
141 except ldb.LdbError, (errno, _):
142 if errno == ldb.ERR_NO_SUCH_OBJECT:
143 # Ignore no such object errors
150 self.delete(msg.dn, ["relax:0"])
151 except ldb.LdbError, (errno, _):
152 if errno != ldb.ERR_NO_SUCH_OBJECT:
153 # Ignore no such object errors
156 def erase_except_schema_controlled(self):
159 :note: Removes all records, except those that are controlled by
165 # Try to delete user/computer accounts to allow deletion of groups
166 self.erase_users_computers(basedn)
168 # Delete the 'visible' records, and the invisble 'deleted' records (if this DB supports it)
169 for msg in self.search(basedn, ldb.SCOPE_SUBTREE,
170 "(&(|(objectclass=*)(distinguishedName=*))(!(distinguishedName=@BASEINFO)))",
171 [], controls=["show_deleted:0"]):
173 self.delete(msg.dn, ["relax:0"])
174 except ldb.LdbError, (errno, _):
175 if errno != ldb.ERR_NO_SUCH_OBJECT:
176 # Ignore no such object errors
179 res = self.search(basedn, ldb.SCOPE_SUBTREE,
180 "(&(|(objectclass=*)(distinguishedName=*))(!(distinguishedName=@BASEINFO)))", [], controls=["show_deleted:0"])
183 # delete the specials
184 for attr in ["@SUBCLASSES", "@MODULES",
185 "@OPTIONS", "@PARTITION", "@KLUDGEACL"]:
187 self.delete(attr, ["relax:0"])
188 except ldb.LdbError, (errno, _):
189 if errno != ldb.ERR_NO_SUCH_OBJECT:
190 # Ignore missing dn errors
194 """Erase this ldb, removing all records."""
196 self.erase_except_schema_controlled()
198 # delete the specials
199 for attr in ["@INDEXLIST", "@ATTRIBUTES"]:
201 self.delete(attr, ["relax:0"])
202 except ldb.LdbError, (errno, _):
203 if errno != ldb.ERR_NO_SUCH_OBJECT:
204 # Ignore missing dn errors
207 def erase_partitions(self):
208 """Erase an ldb, removing all records."""
210 def erase_recursive(self, dn):
212 res = self.search(base=dn, scope=ldb.SCOPE_ONELEVEL, attrs=[],
213 controls=["show_deleted:0"])
214 except ldb.LdbError, (errno, _):
215 if errno == ldb.ERR_NO_SUCH_OBJECT:
216 # Ignore no such object errors
220 erase_recursive(self, msg.dn)
223 self.delete(dn, ["relax:0"])
224 except ldb.LdbError, (errno, _):
225 if errno != ldb.ERR_NO_SUCH_OBJECT:
226 # Ignore no such object errors
229 res = self.search("", ldb.SCOPE_BASE, "(objectClass=*)",
232 if not "namingContexts" in res[0]:
234 for basedn in res[0]["namingContexts"]:
235 # Try to delete user/computer accounts to allow deletion of groups
236 self.erase_users_computers(basedn)
237 # Try and erase from the bottom-up in the tree
238 erase_recursive(self, basedn)
240 def load_ldif_file_add(self, ldif_path):
243 :param ldif_path: Path to LDIF file.
245 self.add_ldif(open(ldif_path, 'r').read())
247 def add_ldif(self, ldif, controls=None):
248 """Add data based on a LDIF string.
250 :param ldif: LDIF text.
252 for changetype, msg in self.parse_ldif(ldif):
253 assert changetype == ldb.CHANGETYPE_NONE
254 self.add(msg,controls)
256 def modify_ldif(self, ldif, controls=None):
257 """Modify database based on a LDIF string.
259 :param ldif: LDIF text.
261 for changetype, msg in self.parse_ldif(ldif):
262 if (changetype == ldb.CHANGETYPE_ADD):
263 self.add(msg, controls)
265 self.modify(msg, controls)
267 def set_domain_sid(self, sid):
268 """Change the domain SID used by this LDB.
270 :param sid: The new domain sid to use.
272 dsdb.samdb_set_domain_sid(self, sid)
274 def domain_sid(self):
275 """Read the domain SID used by this LDB.
278 dsdb.samdb_get_domain_sid(self)
280 def set_schema_from_ldif(self, pf, df):
281 dsdb.dsdb_set_schema_from_ldif(self, pf, df)
283 def set_schema_from_ldb(self, ldb):
284 dsdb.dsdb_set_schema_from_ldb(self, ldb)
286 def write_prefixes_from_schema(self):
287 dsdb.dsdb_write_prefixes_from_schema_to_ldb(self)
289 def convert_schema_to_openldap(self, target, mapping):
290 return dsdb.dsdb_convert_schema_to_openldap(self, target, mapping)
293 def substitute_var(text, values):
294 """Substitute strings of the form ${NAME} in str, replacing
295 with substitutions from subobj.
297 :param text: Text in which to subsitute.
298 :param values: Dictionary with keys and values.
301 for (name, value) in values.items():
302 assert isinstance(name, str), "%r is not a string" % name
303 assert isinstance(value, str), "Value %r for %s is not a string" % (value, name)
304 text = text.replace("${%s}" % name, value)
309 def check_all_substituted(text):
310 """Make sure that all substitution variables in a string have been replaced.
311 If not, raise an exception.
313 :param text: The text to search for substitution variables
318 var_start = text.find("${")
319 var_end = text.find("}", var_start)
321 raise Exception("Not all variables substituted: %s" % text[var_start:var_end+1])
324 def read_and_sub_file(file, subst_vars):
325 """Read a file and sub in variables found in it
327 :param file: File to be read (typically from setup directory)
328 param subst_vars: Optional variables to subsitute in the file.
330 data = open(file, 'r').read()
331 if subst_vars is not None:
332 data = substitute_var(data, subst_vars)
333 check_all_substituted(data)
337 def setup_file(template, fname, subst_vars=None):
338 """Setup a file in the private dir.
340 :param template: Path of the template file.
341 :param fname: Path of the file to create.
342 :param subst_vars: Substitution variables.
344 if os.path.exists(fname):
347 data = read_and_sub_file(template, subst_vars)
355 def valid_netbios_name(name):
356 """Check whether a name is valid as a NetBIOS name. """
357 # See crh's book (1.4.1.1)
361 if not x.isalnum() and not x in " !#$%&'()-.@^_{}~":
366 def ensure_external_module(modulename, location):
367 """Add a location to sys.path if an external dependency can't be found.
369 :param modulename: Module name to import
370 :param location: Location to add to sys.path (can be relative to
374 __import__(modulename)
377 if _in_source_tree():
379 os.path.join(os.path.dirname(__file__),
380 "../../../../lib", location))
381 __import__(modulename)
383 sys.modules[modulename] = __import__(
384 "samba.external.%s" % modulename, fromlist=["samba.external"])
386 version = _glue.version
387 interface_ips = _glue.interface_ips
388 set_debug_level = _glue.set_debug_level
389 unix2nttime = _glue.unix2nttime
390 generate_random_password = _glue.generate_random_password