Implementing LDAP authentication with Python

Breeze and cloud 2021-08-09 12:09:09
implementing ldap authentication python

LDAP brief introduction

A directory service

understand LDAP You need to know before “ A directory service ”, Directory service is a special database , Used to save descriptive 、 Attribute based details , Support filtering function . Such as : Personnel organization management , Phonebook , Address book .


LDAP(Light Directory Access Portocol), It is based on X.500 Standard Lightweight Directory Access Protocol ,LDAP Is open Internet standard , Support cross platform Internet agreement , Widely recognized in the industry , And most of the products on the market or in the open source community have joined the right LDAP Support for , So for this kind of system , It doesn't need to be customized separately , Just go through LDAP Do a simple configuration can do authentication interaction with the server .“ Simple and crude ”, It can greatly reduce the cost of repeated development and docking .

LDAP The basic model of

Every system 、 Protocols all have their own models ,LDAP No exception , In understanding LDAP We need to know a few basic models of LDAP The tree concept of

Directory tree

  1. Directory tree : In a directory service system , The whole directory information set can be represented as a directory information tree , Each node in the tree is an entry .
  2. entry : Every entry is a record , Each item has its own unique and distinguishable name (DN).
  3. Object class : A set of properties corresponding to an entity type , Object classes are inheritable , In this way, the necessary properties of the parent class will also be inherited .
  4. attribute : Information describing an aspect of an item , A property consists of a property type and one or more property values , Attributes have required attributes and non required attributes .



English full name



Domain Component

Part of the domain name , Its format is to divide the whole domain into several parts , If the domain name is become dc=example,dc=com( The location of a record )


User Id

user ID songtao.xu( A record of ID)


Organization Unit

Organizational unit , Organizational units can contain a variety of other objects ( Including other organizational units ), Such as “oa Group ”( The organization of a record )


Common Name

Public name , Such as “Thomas Johansson”( The name of a record )



surname , Such as “ xu ”


Distinguished Name

“uid=songtao.xu,ou=oa Group ,dc=example,dc=com”, The location of a record ( only )


Relative dn

Relative distinguished name , Similar to the relative path in the file system , It's part of the tree structure that doesn't matter , Such as “uid=tom” or “cn= Thomas Johansson”

1.Ldap The directory structure is as follows :

  • As shown in the figure above : Each entry has a unique identification name (distinguished Name ,DN) cn=doubao,ou=Ops,dc=shuyun,dc=com.DN Syntactically, it consists of multiple relative identification names (distinguished Name ,DN) Composed of , They are separated by commas .

2. stay ldap The viewing results in the system are as follows :

As shown in the figure above :ldap The basic search entry is 'dc=***,dc=com', That is, the entry you need to write when logging in as an administrator .


ldap3 brief introduction

ldap3 It's one that can support ldap Connected Libraries , Official documents :

ldap3 install

pip install ldap3

ldap3 Use

from ldap3 import Server, Connection,SUBTREE
ldap_host = 'xx.xx.x.x' #ldap Server address
ldap_port = 389 # Default 389
ldap_admin_user = 'xx' #ldap Administrator account user name
ldap_admin_password = 'xxx' #ldap Administrator account password
ldap_base_search = 'dc=xx,dc=xx' # Query domain
def ldap_auth(username, password):
ldap Verification method
:param username: user name
:param password: password
s = Server(host=ldap_host, port=ldap_port, use_ssl=False, get_info='ALL')
# Connect ldap The server
ldapz_admin_connection = Connection(s, user=ldap_admin_user, password=ldap_admin_password, auto_bind='NONE',
authentication='SIMPLE', client_strategy='SYNC', auto_referrals=True,
read_only=False, lazy=False,
# After connecting, we have to bind To be worthy of
# This is to query the entry search address of the user name you entered
res =,
attributes=['cn', 'givenName', 'mail', 'sAMAccountName'],
if res:
entry = ldapz_admin_connection.response[0]
dn = entry['dn']
attr_dict = entry['attributes']'attr_dic:%s' %attr_dict)
# This connect Is through your user name and password, as well as the above search entry search to query
conn2 = Connection(s, user=dn, password=password, check_names=True, lazy=False, raise_exceptions=False)
# correct -success Incorrect -invalidCredentials
if conn2.result["description"] == "success":"ldap auth pass!")
return True
else:"username or password error!")
return False
except Exception as e:"username or password error!")
return False
except KeyError as e:"username or password error!")
return False

This article is from WeChat official account. - QA A corner (sutune2020)

The source and reprint of the original text are detailed in the text , If there is any infringement , Please contact the [email protected] Delete .

Original publication time : 2020-10-09

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