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"
29 def _in_source_tree():
30 """Check whether the script is being run from the source dir. """
31 return os.path.exists("%s/../../../selftest/skip" % os.path.dirname(__file__))
34 # 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
49 """Simple Samba-specific LDB subclass that takes care
50 of setting up the modules dir, credentials pointers, etc.
52 Please note that this is intended to be for all Samba LDB files,
53 not necessarily the Sam database. For Sam-specific helper
54 functions see samdb.py.
56 def __init__(self, url=None, lp=None, modules_dir=None, session_info=None,
57 credentials=None, flags=0, options=None):
58 """Opens a Samba Ldb file.
60 :param url: Optional LDB URL to open
61 :param lp: Optional loadparm object
62 :param modules_dir: Optional modules directory
63 :param session_info: Optional session information
64 :param credentials: Optional credentials, defaults to anonymous.
65 :param flags: Optional LDB flags
66 :param options: Additional options (optional)
68 This is different from a regular Ldb file in that the Samba-specific
69 modules-dir is used by default and that credentials and session_info
70 can be passed through (required by some modules).
73 if modules_dir is not None:
74 self.set_modules_dir(modules_dir)
75 elif default_ldb_modules_dir is not None:
76 self.set_modules_dir(default_ldb_modules_dir)
78 self.set_modules_dir(os.path.join(lp.get("modules dir"), "ldb"))
80 if session_info is not None:
81 self.set_session_info(session_info)
83 if credentials is not None:
84 self.set_credentials(credentials)
89 # This must be done before we load the schema, as these handlers for
90 # objectSid and objectGUID etc must take precedence over the 'binary
91 # attribute' declaration in the schema
92 glue.ldb_register_samba_handlers(self)
99 glue.ldb_set_utf8_casefold(self)
101 # Allow admins to force non-sync ldb for all databases
103 nosync_p = lp.get("nosync", "ldb")
104 if nosync_p is not None and nosync_p == True:
107 self.set_create_perms()
110 self.connect(url, flags, options)
112 def set_session_info(self, session_info):
113 glue.ldb_set_session_info(self, session_info)
115 def set_credentials(self, credentials):
116 glue.ldb_set_credentials(self, credentials)
118 def set_loadparm(self, lp_ctx):
119 glue.ldb_set_loadparm(self, lp_ctx)
121 def set_create_perms(self, perms=0600):
122 # we usually want Samba databases to be private. If we later find we
123 # need one public, we will have to change this here
124 super(Ldb, self).set_create_perms(perms)
126 def searchone(self, attribute, basedn=None, expression=None,
127 scope=ldb.SCOPE_BASE):
128 """Search for one attribute as a string.
130 :param basedn: BaseDN for the search.
131 :param attribute: Name of the attribute
132 :param expression: Optional search expression.
133 :param scope: Search scope (defaults to base).
134 :return: Value of attribute as a string or None if it wasn't found.
136 res = self.search(basedn, scope, expression, [attribute])
137 if len(res) != 1 or res[0][attribute] is None:
139 values = set(res[0][attribute])
140 assert len(values) == 1
141 return self.schema_format_value(attribute, values.pop())
143 def erase_users_computers(self, dn):
144 """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."""
147 res = self.search(base=dn, scope=ldb.SCOPE_SUBTREE, attrs=[],
148 expression="(|(objectclass=user)(objectclass=computer))")
149 except ldb.LdbError, (errno, _):
150 if errno == ldb.ERR_NO_SUCH_OBJECT:
151 # Ignore no such object errors
159 except ldb.LdbError, (errno, _):
160 if errno != ldb.ERR_NO_SUCH_OBJECT:
161 # Ignore no such object errors
164 def erase_except_schema_controlled(self):
165 """Erase this ldb, removing all records, except those that are controlled by Samba4's schema."""
169 # Try to delete user/computer accounts to allow deletion of groups
170 self.erase_users_computers(basedn)
172 # Delete the 'visible' records, and the invisble 'deleted' records (if this DB supports it)
173 for msg in self.search(basedn, ldb.SCOPE_SUBTREE,
174 "(&(|(objectclass=*)(distinguishedName=*))(!(distinguishedName=@BASEINFO)))",
175 [], controls=["show_deleted:0"]):
178 except ldb.LdbError, (errno, _):
179 if errno != ldb.ERR_NO_SUCH_OBJECT:
180 # Ignore no such object errors
183 res = self.search(basedn, ldb.SCOPE_SUBTREE,
184 "(&(|(objectclass=*)(distinguishedName=*))(!(distinguishedName=@BASEINFO)))",
185 [], controls=["show_deleted:0"])
188 # delete the specials
189 for attr in ["@SUBCLASSES", "@MODULES",
190 "@OPTIONS", "@PARTITION", "@KLUDGEACL"]:
193 except ldb.LdbError, (errno, _):
194 if errno != ldb.ERR_NO_SUCH_OBJECT:
195 # Ignore missing dn errors
199 """Erase this ldb, removing all records."""
201 self.erase_except_schema_controlled()
203 # delete the specials
204 for attr in ["@INDEXLIST", "@ATTRIBUTES"]:
207 except ldb.LdbError, (errno, _):
208 if errno != ldb.ERR_NO_SUCH_OBJECT:
209 # Ignore missing dn errors
212 def erase_partitions(self):
213 """Erase an ldb, removing all records."""
215 def erase_recursive(self, dn):
217 res = self.search(base=dn, scope=ldb.SCOPE_ONELEVEL, attrs=[],
218 controls=["show_deleted:0"])
219 except ldb.LdbError, (errno, _):
220 if errno == ldb.ERR_NO_SUCH_OBJECT:
221 # Ignore no such object errors
225 erase_recursive(self, msg.dn)
229 except ldb.LdbError, (errno, _):
230 if errno != ldb.ERR_NO_SUCH_OBJECT:
231 # Ignore no such object errors
234 res = self.search("", ldb.SCOPE_BASE, "(objectClass=*)",
237 if not "namingContexts" in res[0]:
239 for basedn in res[0]["namingContexts"]:
240 # Try to delete user/computer accounts to allow deletion of groups
241 self.erase_users_computers(basedn)
242 # Try and erase from the bottom-up in the tree
243 erase_recursive(self, basedn)
245 def load_ldif_file_add(self, ldif_path):
248 :param ldif_path: Path to LDIF file.
250 self.add_ldif(open(ldif_path, 'r').read())
252 def add_ldif(self, ldif, controls=None):
253 """Add data based on a LDIF string.
255 :param ldif: LDIF text.
257 for changetype, msg in self.parse_ldif(ldif):
258 assert changetype == ldb.CHANGETYPE_NONE
259 self.add(msg,controls)
261 def modify_ldif(self, ldif, controls=None):
262 """Modify database based on a LDIF string.
264 :param ldif: LDIF text.
266 for changetype, msg in self.parse_ldif(ldif):
267 if (changetype == ldb.CHANGETYPE_ADD):
268 self.add(msg, controls)
270 self.modify(msg, controls)
272 def set_domain_sid(self, sid):
273 """Change the domain SID used by this LDB.
275 :param sid: The new domain sid to use.
277 glue.samdb_set_domain_sid(self, sid)
279 def domain_sid(self):
280 """Read the domain SID used by this LDB.
283 glue.samdb_get_domain_sid(self)
285 def set_schema_from_ldif(self, pf, df):
286 glue.dsdb_set_schema_from_ldif(self, pf, df)
288 def set_schema_from_ldb(self, ldb):
289 glue.dsdb_set_schema_from_ldb(self, ldb)
291 def write_prefixes_from_schema(self):
292 glue.dsdb_write_prefixes_from_schema_to_ldb(self)
294 def convert_schema_to_openldap(self, target, mapping):
295 return glue.dsdb_convert_schema_to_openldap(self, target, mapping)
297 def set_invocation_id(self, invocation_id):
298 """Set the invocation id for this SamDB handle.
300 :param invocation_id: GUID of the invocation id.
302 glue.dsdb_set_ntds_invocation_id(self, invocation_id)
304 def get_invocation_id(self):
305 "Get the invocation_id id"
306 return glue.samdb_ntds_invocation_id(self)
308 def get_ntds_GUID(self):
309 "Get the NTDS objectGUID"
310 return glue.samdb_ntds_objectGUID(self)
312 def server_site_name(self):
313 "Get the server site name"
314 return dsdb.samdb_server_site_name(self)
316 def set_opaque_integer(self, name, value):
317 """Set an integer as an opaque (a flag or other value) value on the database
319 :param name: The name for the opaque value
320 :param value: The integer value
322 glue.dsdb_set_opaque_integer(self, name, value)
325 def substitute_var(text, values):
326 """substitute strings of the form ${NAME} in str, replacing
327 with substitutions from subobj.
329 :param text: Text in which to subsitute.
330 :param values: Dictionary with keys and values.
333 for (name, value) in values.items():
334 assert isinstance(name, str), "%r is not a string" % name
335 assert isinstance(value, str), "Value %r for %s is not a string" % (value, name)
336 text = text.replace("${%s}" % name, value)
341 def check_all_substituted(text):
342 """Make sure that all substitution variables in a string have been replaced.
343 If not, raise an exception.
345 :param text: The text to search for substitution variables
350 var_start = text.find("${")
351 var_end = text.find("}", var_start)
353 raise Exception("Not all variables substituted: %s" % text[var_start:var_end+1])
356 def read_and_sub_file(file, subst_vars):
357 """Read a file and sub in variables found in it
359 :param file: File to be read (typically from setup directory)
360 param subst_vars: Optional variables to subsitute in the file.
362 data = open(file, 'r').read()
363 if subst_vars is not None:
364 data = substitute_var(data, subst_vars)
365 check_all_substituted(data)
369 def setup_file(template, fname, subst_vars=None):
370 """Setup a file in the private dir.
372 :param template: Path of the template file.
373 :param fname: Path of the file to create.
374 :param subst_vars: Substitution variables.
378 if os.path.exists(f):
381 data = read_and_sub_file(template, subst_vars)
382 open(f, 'w').write(data)
385 def valid_netbios_name(name):
386 """Check whether a name is valid as a NetBIOS name. """
387 # See crh's book (1.4.1.1)
391 if not x.isalnum() and not x in " !#$%&'()-.@^_{}~":
396 def ensure_external_module(modulename, location):
397 """Add a location to sys.path if an external dependency can't be found.
399 :param modulename: Module name to import
400 :param location: Location to add to sys.path (can be relative to
404 __import__(modulename)
407 if _in_source_tree():
409 os.path.join(os.path.dirname(__file__),
410 "../../../../lib", location))
411 __import__(modulename)
413 sys.modules[modulename] = __import__(
414 "samba.external.%s" % modulename, fromlist=["samba.external"])
416 version = glue.version