authentication - Authenticating against active directory using python + ldap

Question

How do I authenticate against AD using Python + LDAP. I'm currently using the python-ldap library and all it is producing is tears.

I can't even bind to perform a simple query:

import sys
import ldap


Server = "ldap://my-ldap-server"
DN, Secret, un = sys.argv[1:4]

Base = "dc=mydomain,dc=co,dc=uk"
Scope = ldap.SCOPE_SUBTREE
Filter = "(&(objectClass=user)(sAMAccountName="+un+"))"
Attrs = ["displayName"]

l = ldap.initialize(Server)
l.protocol_version = 3
print l.simple_bind_s(DN, Secret)

r = l.search(Base, Scope, Filter, Attrs)
Type,user = l.result(r,60)
Name,Attrs = user[0]
if hasattr(Attrs, 'has_key') and Attrs.has_key('displayName'):
  displayName = Attrs['displayName'][0]
  print displayName

sys.exit()

Running this with myusername@mydomain.co.uk password username gives me one of two errors:

Invalid Credentials - When I mistype or intentionally use wrong credentials it fails to authenticate.

ldap.INVALID_CREDENTIALS: {'info': '80090308: LdapErr: DSID-0C090334, comment: AcceptSecurityContext error, data 52e, vece', 'desc': 'Invalid credentials'}

Or

ldap.OPERATIONS_ERROR: {'info': '00000000: LdapErr: DSID-0C090627, comment: In order to perform this operation a successful bind must be completed on the connection., data 0, vece', 'desc': 'Operations error'}

What am I missing out to bind properly?

I am getting the same errors on fedora and windows.

Answer 1

I was missing

l.set_option(ldap.OPT_REFERRALS, 0)

From the init.