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"
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 ldb modules can be found
37 srcdir = "%s/../../.." % os.path.dirname(__file__)
38 default_ldb_modules_dir = "%s/bin/modules/ldb" % srcdir
40 default_ldb_modules_dir = None
44 from samba._ldb import Ldb as _Ldb
47 """Simple Samba-specific LDB subclass that takes care
48 of setting up the modules dir, credentials pointers, etc.
50 Please note that this is intended to be for all Samba LDB files,
51 not necessarily the Sam database. For Sam-specific helper
52 functions see samdb.py.
55 def __init__(self, url=None, lp=None, modules_dir=None, session_info=None,
56 credentials=None, flags=0, options=None):
57 """Opens a Samba Ldb file.
59 :param url: Optional LDB URL to open
60 :param lp: Optional loadparm object
61 :param modules_dir: Optional modules directory
62 :param session_info: Optional session information
63 :param credentials: Optional credentials, defaults to anonymous.
64 :param flags: Optional LDB flags
65 :param options: Additional options (optional)
67 This is different from a regular Ldb file in that the Samba-specific
68 modules-dir is used by default and that credentials and session_info
69 can be passed through (required by some modules).
72 if modules_dir is not None:
73 self.set_modules_dir(modules_dir)
74 elif default_ldb_modules_dir is not None:
75 self.set_modules_dir(default_ldb_modules_dir)
77 self.set_modules_dir(os.path.join(lp.get("modules dir"), "ldb"))
79 if session_info is not None:
80 self.set_session_info(session_info)
82 if credentials is not None:
83 self.set_credentials(credentials)
88 # This must be done before we load the schema, as these handlers for
89 # objectSid and objectGUID etc must take precedence over the 'binary
90 # attribute' declaration in the schema
91 self.register_samba_handlers()
98 self.set_utf8_casefold()
100 # Allow admins to force non-sync ldb for all databases
102 nosync_p = lp.get("nosync", "ldb")
103 if nosync_p is not None and nosync_p == True:
104 flags |= ldb.FLG_NOSYNC
106 self.set_create_perms(0600)
109 self.connect(url, flags, options)
111 def searchone(self, attribute, basedn=None, expression=None,
112 scope=ldb.SCOPE_BASE):
113 """Search for one attribute as a string.
115 :param basedn: BaseDN for the search.
116 :param attribute: Name of the attribute
117 :param expression: Optional search expression.
118 :param scope: Search scope (defaults to base).
119 :return: Value of attribute as a string or None if it wasn't found.
121 res = self.search(basedn, scope, expression, [attribute])
122 if len(res) != 1 or res[0][attribute] is None:
124 values = set(res[0][attribute])
125 assert len(values) == 1
126 return self.schema_format_value(attribute, values.pop())
128 def erase_users_computers(self, dn):
129 """Erases user and computer objects from our AD.
131 This is needed since the 'samldb' module denies the deletion of primary
132 groups. Therefore all groups shouldn't be primary somewhere anymore.
136 res = self.search(base=dn, scope=ldb.SCOPE_SUBTREE, attrs=[],
137 expression="(|(objectclass=user)(objectclass=computer))")
138 except ldb.LdbError, (errno, _):
139 if errno == ldb.ERR_NO_SUCH_OBJECT:
140 # Ignore no such object errors
147 self.delete(msg.dn, ["relax:0"])
148 except ldb.LdbError, (errno, _):
149 if errno != ldb.ERR_NO_SUCH_OBJECT:
150 # Ignore no such object errors
153 def erase_except_schema_controlled(self):
156 :note: Removes all records, except those that are controlled by
162 # Try to delete user/computer accounts to allow deletion of groups
163 self.erase_users_computers(basedn)
165 # Delete the 'visible' records, and the invisble 'deleted' records (if this DB supports it)
166 for msg in self.search(basedn, ldb.SCOPE_SUBTREE,
167 "(&(|(objectclass=*)(distinguishedName=*))(!(distinguishedName=@BASEINFO)))",
168 [], controls=["show_deleted:0", "show_recycled:0"]):
170 self.delete(msg.dn, ["relax:0"])
171 except ldb.LdbError, (errno, _):
172 if errno != ldb.ERR_NO_SUCH_OBJECT:
173 # Ignore no such object errors
176 res = self.search(basedn, ldb.SCOPE_SUBTREE,
177 "(&(|(objectclass=*)(distinguishedName=*))(!(distinguishedName=@BASEINFO)))", [], controls=["show_deleted:0", "show_recycled:0"])
180 # delete the specials
181 for attr in ["@SUBCLASSES", "@MODULES",
182 "@OPTIONS", "@PARTITION", "@KLUDGEACL"]:
184 self.delete(attr, ["relax:0"])
185 except ldb.LdbError, (errno, _):
186 if errno != ldb.ERR_NO_SUCH_OBJECT:
187 # Ignore missing dn errors
191 """Erase this ldb, removing all records."""
192 self.erase_except_schema_controlled()
194 # delete the specials
195 for attr in ["@INDEXLIST", "@ATTRIBUTES"]:
197 self.delete(attr, ["relax:0"])
198 except ldb.LdbError, (errno, _):
199 if errno != ldb.ERR_NO_SUCH_OBJECT:
200 # Ignore missing dn errors
203 def load_ldif_file_add(self, ldif_path):
206 :param ldif_path: Path to LDIF file.
208 self.add_ldif(open(ldif_path, 'r').read())
210 def add_ldif(self, ldif, controls=None):
211 """Add data based on a LDIF string.
213 :param ldif: LDIF text.
215 for changetype, msg in self.parse_ldif(ldif):
216 assert changetype == ldb.CHANGETYPE_NONE
217 self.add(msg, controls)
219 def modify_ldif(self, ldif, controls=None):
220 """Modify database based on a LDIF string.
222 :param ldif: LDIF text.
224 for changetype, msg in self.parse_ldif(ldif):
225 if changetype == ldb.CHANGETYPE_ADD:
226 self.add(msg, controls)
228 self.modify(msg, controls)
231 def substitute_var(text, values):
232 """Substitute strings of the form ${NAME} in str, replacing
233 with substitutions from values.
235 :param text: Text in which to subsitute.
236 :param values: Dictionary with keys and values.
239 for (name, value) in values.items():
240 assert isinstance(name, str), "%r is not a string" % name
241 assert isinstance(value, str), "Value %r for %s is not a string" % (value, name)
242 text = text.replace("${%s}" % name, value)
247 def check_all_substituted(text):
248 """Check that all substitution variables in a string have been replaced.
250 If not, raise an exception.
252 :param text: The text to search for substitution variables
257 var_start = text.find("${")
258 var_end = text.find("}", var_start)
260 raise Exception("Not all variables substituted: %s" %
261 text[var_start:var_end+1])
264 def read_and_sub_file(file_name, subst_vars):
265 """Read a file and sub in variables found in it
267 :param file_name: File to be read (typically from setup directory)
268 param subst_vars: Optional variables to subsitute in the file.
270 data = open(file_name, 'r').read()
271 if subst_vars is not None:
272 data = substitute_var(data, subst_vars)
273 check_all_substituted(data)
277 def setup_file(template, fname, subst_vars=None):
278 """Setup a file in the private dir.
280 :param template: Path of the template file.
281 :param fname: Path of the file to create.
282 :param subst_vars: Substitution variables.
284 if os.path.exists(fname):
287 data = read_and_sub_file(template, subst_vars)
295 def valid_netbios_name(name):
296 """Check whether a name is valid as a NetBIOS name. """
297 # See crh's book (1.4.1.1)
301 if not x.isalnum() and not x in " !#$%&'()-.@^_{}~":
306 def import_bundled_package(modulename, location):
307 """Import the bundled version of a package.
309 :note: This should only be called if the system version of the package
312 :param modulename: Module name to import
313 :param location: Location to add to sys.path (can be relative to
318 os.path.join(os.path.dirname(__file__),
319 "../../../../lib", location))
320 sys.modules[modulename] = __import__(modulename)
322 sys.modules[modulename] = __import__(
323 "samba.external.%s" % modulename, fromlist=["samba.external"])
326 def ensure_external_module(modulename, location):
327 """Add a location to sys.path if an external dependency can't be found.
329 :param modulename: Module name to import
330 :param location: Location to add to sys.path (can be relative to
334 __import__(modulename)
336 import_bundled_package(modulename, location)
339 from samba import _glue
340 version = _glue.version
341 interface_ips = _glue.interface_ips
342 set_debug_level = _glue.set_debug_level
343 get_debug_level = _glue.get_debug_level
344 unix2nttime = _glue.unix2nttime
345 nttime2string = _glue.nttime2string
346 nttime2unix = _glue.nttime2unix
347 unix2nttime = _glue.unix2nttime
348 generate_random_password = _glue.generate_random_password