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from nameko.events import EventDispatcher, event_handler
from nameko.rpc import rpc
from configparser import ConfigParser
from ldap3 import Server, ServerPool, Connection, ObjectDef, AttrDef, Reader, Writer
from datetime import datetime
# For testing
from random import randint
# Read the config in the nameko.conf
config = ConfigParser()
config.read('nameko.conf')
# Sanity check for config
try:
mult_server = int(config['LDAP']['SERVERMULTIPLE'])
# SERVERMULTIPLE is set to something not a number
except:
exit("[LDAP] SERVERMULTIPLE has to be an integer >= 1")
# less than one server is not a sensible option
if mult_server < 1:
exit("[LDAP] SERVERMULTIPLE has to be an integer >= 1")
# Function to setup the server or serverpool
def ldapservers():
# Just one server, no need for a pool
if mult_server == 1:
ldapserver = Server(config['LDAP']['LDAPSERVER1'], use_ssl=True)
return ldapserver
# Multiple servers, set up a pool
else:
ldapserver = ServerPool(None)
for x in range(1, (mult_server+1)):
ins = Server(config['LDAP']['LDAPSERVER' + str(x)], use_ssl=True)
ldapserver.add(ins)
return ldapserver
# Since there's no reason why someone in ou=users shouldn't use the service,
# here's the helper function to check whether an uid is in ou=customers or
# ou=users
# returns the full dn
def user_or_customer(uid):
server = ldapservers()
conn = Connection(server, config['LDAP']['LDAPMANAGER'], config.get('LDAP','LDAPMANAGERPASSWORD', raw=True))
conn.bind()
search_customers = conn.search('ou=customers,dc=ungleich,dc=ch', '(%s)' % uid)
if search_customers:
conn.unbind()
return '%s,ou=customers,dc=ungleich,dc=ch' % uid
search_users = conn.search('ou=users,dc=ungleich,dc=ch', '(%s)' % uid)
if search_users:
conn.unbind()
return '%s,ou=users,dc=ungleich,dc=ch' % uid
conn.unbind()
return False
# Get the objectclasses
def objclasses(rdn, uid, connection):
# search for objectClasses
connection.search(rdn, '(%s)' % uid, attributes=['objectClass'])
objclass = []
# get the relevant data
tmp = connection.entries[0]['objectClass']
# This one sets up the array
for y in tmp:
objclass.append(y)
# return the array containing the objectClasses, like ['inetOrgPerson', 'posixAccount', 'ldapPublicKey']
return objclass
# checks if a user already exists in the LDAP
class UserLookUp(object):
name = "userlookup"
dispatch = EventDispatcher()
@rpc
def lookup(self, user):
# Setup the search parameter and connect to LDAP
LDAP_UID = 'uid=%s' % user
server = ldapservers()
conn = Connection(server, config['LDAP']['LDAPMANAGER'], config.get('LDAP','LDAPMANAGERPASSWORD', raw=True))
conn.bind()
# Strange result. It keeps complaining LDAP_UID not set if I try to directly
# substitute x and y to the if
# Searches for user in ou=customers and ou=users
x = conn.search('ou=customers,dc=ungleich,dc=ch', '(%s)' % LDAP_UID)
y = conn.search('ou=users,dc=ungleich,dc=ch', '(%s)' % LDAP_UID)
if x or y:
# return conn.entries[0] for first search result since we can assume uid is unique
self.dispatch('ldap', '%s [Info: UserLookUp] Searched for %s and found it\n' % (datetime.now(), LDAP_UID) )
conn.unbind()
# return True since the user is already in LDAP
return True
# User not in LDAP, so just close it down, write the log and return False
else:
conn.unbind()
self.dispatch('ldap', '%s [Info: UserLookUp] Searched for %s and not found it.\n' % (datetime.now(), LDAP_UID) )
return False
# Create a user in the LDAP. Assumes the checks are already in place for existing users
class CreateUser(object):
name = "createuser"
dispatch = EventDispatcher()
@rpc
def create_user(self, user, password, firstname, lastname, email):
# Creates a user with some basic data
server = ldapservers()
conn = Connection(server, config['LDAP']['LDAPMANAGER'], config.get('LDAP','LDAPMANAGERPASSWORD', raw=True))
if not conn.bind():
self.dispatch('ldap', '%s [Error CreateUser] Could not connect to LDAPserver\n' % datetime.now() )
return "Could not connect to LDAP Server."
# set objectClasses for the new user
obj_new_user = ObjectDef(['inetOrgPerson', 'posixAccount', 'ldapPublicKey'], conn)
w = Writer(conn, obj_new_user)
dn = 'uid=%s,ou=users,dc=ungleich,dc=ch' % user
w.new(dn)
# Filling in some of the data
# required attributes are sn, cn, homeDirectory, uid (already handled by dn), uidNumber, gidNumber
w[0].givenName = firstname
w[0].sn = lastname
w[0].cn = firstname + " " + lastname
w[0].mail = email
w[0].userPassword = password
w[0].homeDirectory = '/home/%s' % user
# Set uidNumber as last used uidNumber+1
w[0].uidNumber = self.get_new_uid_number(conn)
# gidNumber for users created by userservice, nice and clear
w[0].gidNumber = 10004
if not w.commit():
conn.unbind()
self.dispatch('ldap', '%s [Error CreateUser] Could not write new user %s to LDAP DB\n' % (datetime.now(), dn) )
return "Couldn't write data to the LDAP Server."
conn.unbind()
self.dispatch('ldap', '%s [Info CreateUser] %s created.\n' % (datetime.now(), dn) )
return True
# Function to get the next uid number. Not elegant, but LAM does it too and didn't really find anything
# nicer. The sorted() seems to be quite efficient, so it shouldn't take too long even on larger arrays
def get_new_uid_number(self, conn):
conn.search('dc=ungleich,dc=ch', '(&(objectClass=posixAccount)(uidNumber=*))', attributes = [ 'uidNumber' ])
newuid = 0
uidlist = []
for c in conn.response:
uidlist.append(c['attributes']['uidNumber'])
# New uid is highest old uidnumber plus one
newuid = (sorted(uidlist)[len(uidlist)-1] + 1)
return newuid
# Returns some basic data from an user
class GetUserData(object):
name = "getuserdata"
dispatch = EventDispatcher()
@rpc
def get_data(self, user):
# Setup the search parameter and connect to LDAP
LDAP_UID = 'uid=%s' % user
server = ldapservers()
conn = Connection(server, config['LDAP']['LDAPMANAGER'], config.get('LDAP', 'LDAPMANAGERPASSWORD', raw=True))
conn.bind()
if not conn.bound:
self.dispatch('ldap', '%s [Error GetUserData] Could not connect to LDAP server.\n' % datetime.now() )
return ("error", "Could not connect to LDAP server.", "", "")
rdn = user_or_customer(LDAP_UID)
if rdn == False:
conn.unbind()
self.dispatch('ldap', '%s [Info GetUserData] Could not find user %s\n' % (datetime.now(), LDAP_UID) )
return ("error", "Could not find the user.", "", "")
# Workaround because not all users have the same objectClasses
objclass = objclasses(rdn, LDAP_UID, conn)
obj = ObjectDef(objclass, conn)
# The Reader gets the data for the user
r = Reader(conn, obj, rdn)
r.search()
# Since the DN is basically confirmed by user_or_customer() it shouldn't throw an exception, but better check
try:
x = r[0].sn
except:
conn.unbind()
self.dispatch('ldap', '%s [Error GetUserData] Could not open Reader for %s\n' % (datetime.now(), rdn) )
return ("error", "Could not read data for user.", "", "")
# Putting the results into strings and then clean it up a bit if some attribute is not set in LDAP
(firstname, lastname, email) = (str(r[0].givenName), str(r[0].sn), str(r[0].mail))
if firstname == '[]':
firstname = 'No firstname given'
if lastname == '[]':
lastname = 'No lastname given'
if email == '[]':
email = 'No email given'
conn.unbind()
self.dispatch('ldap', '%s [Info GetUserData] Got data for %s Firstname: %s Lastname: %s Email: %s\n' % (datetime.now(), rdn, firstname, lastname, email) )
return ("OK", firstname, lastname, email)
# change some (firstname, lastname, email) data for the user
class ChangeUserData(object):
name = "changeuserdata"
dispatch = EventDispatcher()
@rpc
def change_data(self, user, firstname, lastname, email):
LDAP_UID = 'uid=%s' % user
server = ldapservers()
# Establish connection with a user who can change the data
conn = Connection(server, config['LDAP']['LDAPMANAGER'], config.get('LDAP', 'LDAPMANAGERPASSWORD', raw=True))
if not conn.bind():
self.dispatch('ldap', '%s [Error ChangeUserData] Could not connect to LDAP server.\n' % datetime.now() )
return "Could not connect to LDAP server."
# get the DN of the user
rdn = user_or_customer(LDAP_UID)
if rdn == False:
conn.unbind()
self.dispatch('ldap', '%s [Info ChangeUserData] User with %s not found.\n' % (datetime.now(), LDAP_UID) )
return "Could not find user."
# Fix because not every user has the same objectClasses
objclass = objclasses(rdn, LDAP_UID, conn)
# Set up a reader for the user
obj = ObjectDef(objclass, conn)
r = Reader(conn, obj, rdn)
r.search()
# Again, user_or_customer() should prevent it from throwing an exception because it's a confirmed user
try:
x = r[0].sn
except:
conn.unbind()
self.dispatch('ldap', '%s [Error ChangeUserData] Could not open Reader for %s\n' % (datetime.now(), rdn) )
return "Could not open the data of user."
# Opens a Writer instance prefilled with the old data
# We could check if something has changed, but since the form takes the old data as standard values, let's
# just update the relevant attributes
w = Writer.from_cursor(r)
w[0].sn = lastname
w[0].cn = firstname + " " + lastname
w[0].givenName = firstname
w[0].mail = email
# check if the data is written
if not w.commit():
conn.unbind()
self.dispatch('ldap', '%s [Error ChangeUserData] Could not write changes for %s\n' % (datetime.now(), rdn) )
return "Could not write changes for user."
conn.unbind()
self.dispatch('ldap', '%s [Info ChangeUserData] Changed data for %s Firstname: %s Lastname: %s Email: %s\n' % (datetime.now(), rdn, firstname, lastname, email) )
return True
# change the password for the user
class ChangePassword(object):
name = "changepassword"
dispatch = EventDispatcher()
@rpc
def change_password(self, user, newpassword):
LDAP_UID = 'uid=%s' % user
server = ldapservers()
conn = Connection(server, config['LDAP']['LDAPMANAGER'], config.get('LDAP', 'LDAPMANAGERPASSWORD', raw=True))
if not conn.bind():
self.dispatch('ldap', '%s [Error ChangePassword] Could not connect to LDAP server.\n' % datetime.now() )
return "Could not connect to LDAP server."
# check if uid=user is in either ou=customers or ou=users
rdn = user_or_customer(LDAP_UID)
if rdn == False:
conn.unbind()
self.dispatch('ldap', '%s [Error ChangePassword] Could not find user %s\n' % (datetime.now(), LDAP_UID) )
return "Could not find the user."
# Plus not everyone has the same objectClasses, so workaround
objclass = objclasses(rdn, LDAP_UID, conn)
obj = ObjectDef(objclass, conn)
# Set up a Reader for the DN
r = Reader(conn, obj, rdn)
r.search()
# Shouldn't throw an exception, since the user is confirmed to be there
try:
x = r[0].sn
except:
conn.unbind()
self.dispatch('ldap', '%s [Error ChangePassword] Could not open Reader for %s\n' % (datetime.now(), rdn) )
return "Could not open the data for the user."
# Set up the writer and overwrite the attribute with the new password
w = Writer.from_cursor(r)
w[0].userPassword = newpassword
# Check to see if the change has gone through
if not w.commit():
conn.unbind()
self.dispatch('ldap', '%s [Error ChangePassword] Could not write data for %s\n' % (datetime.now(), rdn) )
return "Could not write data for the user."
conn.unbind()
self.dispatch('ldap', '%s [Info ChangePassword] Password changed for %s\n' % (datetime.now(), rdn) )
return True
# Deletes a user from LDAP
class DeleteUser(object):
name = "deleteuser"
dispatch = EventDispatcher()
@rpc
def delete_user(self, user):
LDAP_UID = 'uid=%s' % user
server = ldapservers()
conn = Connection(server, config['LDAP']['LDAPMANAGER'], config.get('LDAP', 'LDAPMANAGERPASSWORD', raw=True))
conn.bind()
if not conn.bound:
self.dispatch('ldap', '%s [Error DeleteUser] Could not connect to LDAP server.\n' % datetime.now() )
return "Could not connect to LDAP server."
# again, check whether the uid= is in ou=users or ou=customers
dn = user_or_customer(LDAP_UID)
if dn == False:
conn.unbind()
self.dispatch('ldap', '%s [Error DeleteUser] Could not find the user %s\n' % (datetime.now(), LDAP_UID) )
return "Could not find the user."
# Check if the delete was successfull
deleted = conn.delete(dn)
if not deleted:
conn.unbind()
self.dispatch('ldap', '%s [Error DeleteUser] Could not delete %s\n' % (datetime.now(), dn) )
return "Could not delete the user."
conn.unbind()
self.dispatch('ldap', '%s [Info DeleteUser] Deleted %s\n' % (datetime.now(), dn) )
return True
# the class to log all the dispatches
# for now everything gets logged into the same logfile, but
# I don't forsee that much traffic plus with timestamps and the class name
# in the log should be readable
class Log(object):
name = "log"
ldaplog = config['System']['LOGDIR'] + '/ldap.log'
# Gets all the dispatches with 'ldap' and writes them into the ldap.log
@event_handler('userlookup', 'ldap')
@event_handler('createuser', 'ldap')
@event_handler('getuserdata', 'ldap')
@event_handler('changeuserdata', 'ldap')
@event_handler('passwordresetrequest', 'ldap')
@event_handler('changepassword', 'ldap')
@event_handler('deleteuser', 'ldap')
def event_handler_ldap(self, payload):
f = open(self.ldaplog, mode='a', encoding='utf-8')
f.write(payload)
f.close