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myldap.py
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myldap.py
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#!/usr/bin/env python
# encoding: utf-8
"""
CLI to interact with an OpenLDAP instance.
Requires: python3, pyldap, click
"""
import click
import getpass
import ldap
import os
import random
import string
LDAP_SERVER = os.environ.get('LDAP_SERVER')
LDAP_TOP_DN = os.environ.get('LDAP_TOP_DN')
LDAP_ADMIN_DN = os.environ.get('LDAP_ADMIN_DN')
LDAP_ADMIN_PASSWORD = os.environ.get('LDAP_ADMIN_PASSWORD')
LDAP_CONN = ldap.initialize(LDAP_SERVER)
LDAP_CONN.bind(LDAP_ADMIN_DN, LDAP_ADMIN_PASSWORD)
class User(object):
"""LDAP User"""
def __init__(self, username):
self.username = username
# we lookup in LDAP if user really exists under this username
result = LDAP_CONN.search_s(
LDAP_TOP_DN,
ldap.SCOPE_ONELEVEL,
filterstr='(uid={})'.format(self.username)
)
if len(result) == 1:
for dn, infos in result:
self.dn = dn
for key, values in infos.items():
if key not in ['userPassword', 'uid']:
value = values[0].decode('utf-8')
setattr(self, key, value)
elif not result:
raise ValueError('{} does not exist'.format(self.username))
else:
raise ValueError('{} is not unique'.format(self.username))
def __repr__(self):
return '<User {}>'.format(self.dn)
@staticmethod
def generate_random_password():
choices = string.ascii_letters + string.digits
new_password = ''.join(random.sample(choices, random.randint(8, 16)))
return new_password
@staticmethod
def search(key=None, value=None):
"""Search LDAP according to key parameters"""
if key and value:
result = LDAP_CONN.search_s(
LDAP_TOP_DN,
ldap.SCOPE_ONELEVEL,
filterstr='({0}={1})'.format(key, value)
)
elif not key and not value:
result = LDAP_CONN.search_s(
LDAP_TOP_DN,
ldap.SCOPE_ONELEVEL
)
else:
result = []
return result
@staticmethod
def create(common_name, first_name, last_name, username):
"""Create an account"""
if User.search('cn', common_name):
raise ValueError('{} already exists'.format(common_name))
elif User.search('uid', username):
raise ValueError('{} already exists'.format(username))
else:
data = {
'uid': username,
'givenName': first_name,
'sn': last_name,
'cn': common_name,
'objectClass': 'inetOrgPerson'
}
data = [
(key, value.encode('utf-8')) for key, value in data.items()
]
LDAP_CONN.add_s(LDAP_TOP_DN, data)
user = User(username)
user.reset()
def update(self, key, value):
"""Modify attribute for user.
Attribute must be a recognize type in LDAP (e.g givenName, sn, etc.)"""
value = value.encode('utf-8')
LDAP_CONN.modify_s(self.dn, [(ldap.MOD_REPLACE, key, value)])
def delete(self):
LDAP_CONN.delete_s(self.dn)
def passwd(self, old_password, new_password):
"""Modify password"""
LDAP_CONN.passwd_s(self.dn, old_password, new_password)
def reset(self):
"""Reset user's password"""
self.update('userPassword', self.username)
new_password = User.generate_random_password()
self.passwd(self.username, new_password)
print('New password is {}. Please change it'.format(new_password))
@click.group()
def cli():
pass
@cli.command()
@click.argument('attr')
def search(attr):
"""Search LDAP"""
key, value = attr.split('=')
if key not in ['cn', 'uid', 'sn', 'givenName']:
msg = ("attr represents data like key=value "
"where key is in ['cn', 'uid', 'sn', 'givenName'] "
"and value is an expression")
click.echo(msg)
else:
result = search(key, value)
for dn, infos in result:
user = User(infos['uid'][0].decode('utf-8'))
for key, value in user.__dict__.items():
if key != 'userPassword':
click.echo('{0}: {1}'.format(key, value))
click.echo('\n')
@cli.command()
@click.argument('username')
def get(username):
"""Display infos about user"""
try:
user = User(username)
except ValueError as exc:
click.echo(exc)
else:
for key, value in user.__dict__.items():
if key != 'userPassword':
click.echo('{0}: {1}'.format(key, value))
@cli.command()
@click.argument('common_name')
@click.argument('first_name')
@click.argument('last_name')
@click.argument('username')
def create(common_name, first_name, last_name, username):
"""Create account for a new user"""
User.create(common_name, first_name, last_name, username)
@cli.command()
@click.argument('username')
def reset(username):
"""Reset username's password"""
try:
user = User(username)
except ValueError as exc:
click.echo(exc)
else:
user.reset()
@cli.command()
@click.argument('username')
def passwd(username):
"""Modify user's password"""
try:
user = User(username)
except ValueError as exc:
click.echo(exc)
else:
old_password = getpass.getpass(prompt='Old password')
new_password = getpass.getpass(prompt='New password')
new_password_confirm = getpass.getpass(prompt='Confirm new password')
if new_password == new_password_confirm:
user.passwd(old_password, new_password)
else:
msg = 'Please make sure to enter the same value for new password'
click.echo(msg)
@cli.command()
@click.argument('username')
@click.option('--attr', help='update attribute with attrname=value')
def update(username, attr):
"""Update user's attribute"""
try:
user = User(username)
except ValueError as exc:
click.echo(exc)
else:
attr, value = attr.split('=')
user.update(attr, value)
@cli.command()
@click.argument('username')
def delete(username):
"""Delete user from ldap"""
try:
user = User(username)
except ValueError as exc:
click.echo(exc)
else:
user.delete()
click.echo('{} has been deleted'.format(username))
if __name__ == '__main__':
cli()
# EOF