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# passwd.py - lookup functions for user account information
#
# Copyright (C) 2010-2017 Arthur de Jong
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA
import logging
import cache
import cfg
import common
import constants
import search
attmap = common.Attributes(uid='uid',
userPassword='"*"',
uidNumber='uidNumber',
gidNumber='gidNumber',
gecos='"${gecos:-$cn}"',
homeDirectory='homeDirectory',
loginShell='loginShell',
objectClass='objectClass')
filter = '(objectClass=posixAccount)'
class Search(search.LDAPSearch):
case_sensitive = ('uid', 'uidNumber', )
limit_attributes = ('uid', 'uidNumber', )
required = ('uid', 'uidNumber', 'gidNumber', 'gecos', 'homeDirectory',
'loginShell')
def mk_filter(self):
if 'uidNumber' in self.parameters:
self.parameters['uidNumber'] -= cfg.nss_uid_offset
return super(Search, self).mk_filter()
class Cache(cache.Cache):
create_sql = '''
CREATE TABLE IF NOT EXISTS `passwd_cache`
( `uid` TEXT PRIMARY KEY,
`userPassword` TEXT,
`uidNumber` INTEGER NOT NULL UNIQUE,
`gidNumber` INTEGER NOT NULL,
`gecos` TEXT,
`homeDirectory` TEXT,
`loginShell` TEXT,
`mtime` TIMESTAMP NOT NULL );
'''
class PasswdRequest(common.Request):
def write(self, name, passwd, uid, gid, gecos, home, shell):
self.fp.write_string(name)
self.fp.write_string(passwd)
self.fp.write_int32(uid)
self.fp.write_int32(gid)
self.fp.write_string(gecos)
self.fp.write_string(home)
self.fp.write_string(shell)
def convert(self, dn, attributes, parameters):
names = attributes['uid']
if 'shadowAccount' in attributes['objectClass']:
passwd = 'x'
else:
try:
passwd = attributes['userPassword'][0]
except IndexError:
passwd = None
if not passwd or self.calleruid != 0:
passwd = '*'
uids = [int(x) + cfg.nss_uid_offset for x in attributes['uidNumber']]
gid = int(attributes['gidNumber'][0]) + cfg.nss_gid_offset
gecos = attributes['gecos'][0]
home = attributes['homeDirectory'][0]
shell = attributes['loginShell'][0]
for name in names:
if not common.is_valid_name(name):
logging.warning('%s: %s: denied by validnames option', dn, attmap['uid'])
else:
for uid in uids:
if uid >= cfg.nss_min_uid:
yield (name, passwd, uid, gid, gecos, home, shell)
class PasswdByNameRequest(PasswdRequest):
action = constants.NSLCD_ACTION_PASSWD_BYNAME
def read_parameters(self, fp):
name = fp.read_string()
common.validate_name(name)
return dict(uid=name)
class PasswdByUidRequest(PasswdRequest):
action = constants.NSLCD_ACTION_PASSWD_BYUID
def read_parameters(self, fp):
return dict(uidNumber=fp.read_int32())
def handle_request(self, parameters):
# check requested numeric id
if parameters['uidNumber'] >= cfg.nss_min_uid:
return super(PasswdByUidRequest, self).handle_request(parameters)
# write the final result code to signify empty results
self.fp.write_int32(constants.NSLCD_RESULT_END)
class PasswdAllRequest(PasswdRequest):
action = constants.NSLCD_ACTION_PASSWD_ALL
def handle_request(self, parameters):
if not cfg.nss_disable_enumeration:
return super(PasswdAllRequest, self).handle_request(parameters)
def uid2entry(conn, uid):
"""Look up the user by uid and return the LDAP entry or None if the user
was not found."""
for dn, attributes in Search(conn, parameters=dict(uid=uid)):
if any((int(x) + cfg.nss_uid_offset) >= cfg.nss_min_uid for x in attributes['uidNumber']):
return dn, attributes
# FIXME: use cache of dn2uid and try to use DN to get uid attribute
def dn2uid(conn, dn):
"""Look up the user by dn and return a uid or None if the user was
not found."""
for dn, attributes in Search(conn, base=dn):
if any((int(x) + cfg.nss_uid_offset) >= cfg.nss_min_uid for x in attributes['uidNumber']):
return attributes['uid'][0]
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