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#!/usr/bin/python
# Unix SMB/CIFS implementation.
# Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007-2008
# Copyright (C) Matthias Dieter Wallnoefer 2009
#
# Based on the original in EJS:
# Copyright (C) Andrew Tridgell <tridge@samba.org> 2005
#
# 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/>.
#
"""Convenience functions for using the SAM."""
import samba
import glue
import ldb
from samba.idmap import IDmapDB
import pwd
import time
import base64
__docformat__ = "restructuredText"
class SamDB(samba.Ldb):
"""The SAM database."""
def __init__(self, url=None, lp=None, modules_dir=None, session_info=None,
credentials=None, flags=0, options=None):
"""Opens the SAM Database
For parameter meanings see the super class (samba.Ldb)
"""
self.lp = lp
if url is None:
url = lp.get("sam database")
super(SamDB, self).__init__(url=url, lp=lp, modules_dir=modules_dir,
session_info=session_info, credentials=credentials, flags=flags,
options=options)
glue.dsdb_set_global_schema(self)
def connect(self, url=None, flags=0, options=None):
super(SamDB, self).connect(url=self.lp.private_path(url), flags=flags,
options=options)
def domain_dn(self):
# find the DNs for the domain
res = self.search(base="",
scope=ldb.SCOPE_BASE,
expression="(defaultNamingContext=*)",
attrs=["defaultNamingContext"])
assert(len(res) == 1 and res[0]["defaultNamingContext"] is not None)
return res[0]["defaultNamingContext"][0]
def enable_account(self, filter):
"""Enables an account
:param filter: LDAP filter to find the user (eg samccountname=name)
"""
res = self.search(base=self.domain_dn(), scope=ldb.SCOPE_SUBTREE,
expression=filter, attrs=["userAccountControl"])
assert(len(res) == 1)
user_dn = res[0].dn
userAccountControl = int(res[0]["userAccountControl"][0])
if (userAccountControl & 0x2):
userAccountControl = userAccountControl & ~0x2 # remove disabled bit
if (userAccountControl & 0x20):
userAccountControl = userAccountControl & ~0x20 # remove 'no password required' bit
mod = """
dn: %s
changetype: modify
replace: userAccountControl
userAccountControl: %u
""" % (user_dn, userAccountControl)
self.modify_ldif(mod)
def force_password_change_at_next_login(self, filter):
"""Forces a password change at next login
:param filter: LDAP filter to find the user (eg samccountname=name)
"""
res = self.search(base=self.domain_dn(), scope=ldb.SCOPE_SUBTREE,
expression=filter, attrs=[])
assert(len(res) == 1)
user_dn = res[0].dn
mod = """
dn: %s
changetype: modify
replace: pwdLastSet
pwdLastSet: 0
""" % (user_dn)
self.modify_ldif(mod)
def newuser(self, username, unixname, password, force_password_change_at_next_login_req=False):
"""Adds a new user
Note: This call adds also the ID mapping for winbind; therefore it works
*only* on SAMBA 4.
:param username: Name of the new user
:param unixname: Name of the unix user to map to
:param password: Password for the new user
:param force_password_change_at_next_login_req: Force password change
"""
self.transaction_start()
try:
user_dn = "CN=%s,CN=Users,%s" % (username, self.domain_dn())
# The new user record. Note the reliance on the SAMLDB module which
# fills in the default informations
self.add({"dn": user_dn,
"sAMAccountName": username,
"objectClass": "user"})
# Sets the password for it
self.setpassword("(dn=" + user_dn + ")", password,
force_password_change_at_next_login_req)
# Gets the user SID (for the account mapping setup)
res = self.search(user_dn, scope=ldb.SCOPE_BASE,
expression="objectclass=*",
attrs=["objectSid"])
assert len(res) == 1
user_sid = self.schema_format_value("objectSid", res[0]["objectSid"][0])
try:
idmap = IDmapDB(lp=self.lp)
user = pwd.getpwnam(unixname)
# setup ID mapping for this UID
idmap.setup_name_mapping(user_sid, idmap.TYPE_UID, user[2])
except KeyError:
pass
except:
self.transaction_cancel()
raise
self.transaction_commit()
def setpassword(self, filter, password, force_password_change_at_next_login_req=False):
"""Sets the password for a user
Note: This call uses the "userPassword" attribute to set the password.
This works correctly on SAMBA 4 and on Windows DCs with
"2003 Native" or higer domain function level.
:param filter: LDAP filter to find the user (eg samccountname=name)
:param password: Password for the user
:param force_password_change_at_next_login_req: Force password change
"""
self.transaction_start()
try:
res = self.search(base=self.domain_dn(), scope=ldb.SCOPE_SUBTREE,
expression=filter, attrs=[])
assert(len(res) == 1)
user_dn = res[0].dn
setpw = """
dn: %s
changetype: modify
replace: userPassword
userPassword:: %s
""" % (user_dn, base64.b64encode(password))
self.modify_ldif(setpw)
if force_password_change_at_next_login_req:
self.force_password_change_at_next_login(
"(dn=" + str(user_dn) + ")")
# modify the userAccountControl to remove the disabled bit
self.enable_account(filter)
except:
self.transaction_cancel()
raise
self.transaction_commit()
def setexpiry(self, filter, expiry_seconds, no_expiry_req=False):
"""Sets the account expiry for a user
:param filter: LDAP filter to find the user (eg samccountname=name)
:param expiry_seconds: expiry time from now in seconds
:param no_expiry_req: if set, then don't expire password
"""
self.transaction_start()
try:
res = self.search(base=self.domain_dn(), scope=ldb.SCOPE_SUBTREE,
expression=filter,
attrs=["userAccountControl", "accountExpires"])
assert(len(res) == 1)
user_dn = res[0].dn
userAccountControl = int(res[0]["userAccountControl"][0])
accountExpires = int(res[0]["accountExpires"][0])
if no_expiry_req:
userAccountControl = userAccountControl | 0x10000
accountExpires = 0
else:
userAccountControl = userAccountControl & ~0x10000
accountExpires = samba.unix2nttime(expiry_seconds + int(time.time()))
setexp = """
dn: %s
changetype: modify
replace: userAccountControl
userAccountControl: %u
replace: accountExpires
accountExpires: %u
""" % (user_dn, userAccountControl, accountExpires)
self.modify_ldif(setexp)
except:
self.transaction_cancel()
raise
self.transaction_commit()
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