294 lines
12 KiB
Python
294 lines
12 KiB
Python
"""Wrapper for ldap3 to easily manage user"""
|
|
from logging import getLogger
|
|
from time import time
|
|
|
|
import ldap3
|
|
import ldap3.core.exceptions
|
|
|
|
from passbook.core.models import User
|
|
from passbook.ldap.models import LDAPSource
|
|
from passbook.lib.config import CONFIG
|
|
|
|
LOGGER = getLogger(__name__)
|
|
|
|
USERNAME_FIELD = CONFIG.y('ldap.username_field', 'sAMAccountName')
|
|
LOGIN_FIELD = CONFIG.y('ldap.login_field', 'userPrincipalName')
|
|
|
|
|
|
class LDAPConnector:
|
|
"""Wrapper for ldap3 to easily manage user authentication and creation"""
|
|
|
|
_server = None
|
|
_connection = None
|
|
_source = None
|
|
|
|
def __init__(self, source: LDAPSource):
|
|
self._source = source
|
|
|
|
if not self._source.enabled:
|
|
LOGGER.debug("LDAP not Enabled")
|
|
|
|
# if not con_args:
|
|
# con_args = {}
|
|
# if not server_args:
|
|
# server_args = {}
|
|
# Either use mock argument or test is in argv
|
|
# if mock or any('test' in arg for arg in sys.argv):
|
|
# self.mock = True
|
|
# self.create_users_enabled = True
|
|
# con_args['client_strategy'] = ldap3.MOCK_SYNC
|
|
# server_args['get_info'] = ldap3.OFFLINE_AD_2012_R2
|
|
# if self.mock:
|
|
# json_path = os.path.join(os.path.dirname(__file__), 'tests', 'ldap_mock.json')
|
|
# self._connection.strategy.entries_from_json(json_path)
|
|
|
|
self._server = ldap3.Server(source.server_uri) # Implement URI parsing
|
|
self._connection = ldap3.Connection(self._server, raise_exceptions=True,
|
|
user=source.bind_cn,
|
|
password=source.bind_password)
|
|
|
|
self._connection.bind()
|
|
# if CONFIG.y('ldap.server.use_tls'):
|
|
# self._connection.start_tls()
|
|
|
|
# @staticmethod
|
|
# def cleanup_mock():
|
|
# """Cleanup mock files which are not this PID's"""
|
|
# pid = os.getpid()
|
|
# json_path = os.path.join(os.path.dirname(__file__), 'test', 'ldap_mock_%d.json' % pid)
|
|
# os.unlink(json_path)
|
|
# LOGGER.debug("Cleaned up LDAP Mock from PID %d", pid)
|
|
|
|
# def apply_db(self):
|
|
# """Check if any unapplied LDAPModification's are left"""
|
|
# to_apply = LDAPModification.objects.filter(_purgeable=False)
|
|
# for obj in to_apply:
|
|
# try:
|
|
# if obj.action == LDAPModification.ACTION_ADD:
|
|
# self._connection.add(obj.dn, obj.data)
|
|
# elif obj.action == LDAPModification.ACTION_MODIFY:
|
|
# self._connection.modify(obj.dn, obj.data)
|
|
|
|
# # Object has been successfully applied to LDAP
|
|
# obj.delete()
|
|
# except ldap3.core.exceptions.LDAPException as exc:
|
|
# LOGGER.error(exc)
|
|
# LOGGER.debug("Recovered %d Modifications from DB.", len(to_apply))
|
|
|
|
# @staticmethod
|
|
# def handle_ldap_error(object_dn, action, data):
|
|
# """Custom Handler for LDAP methods to write LDIF to DB"""
|
|
# LDAPModification.objects.create(
|
|
# dn=object_dn,
|
|
# action=action,
|
|
# data=data)
|
|
|
|
# @property
|
|
# def enabled(self):
|
|
# """Returns whether LDAP is enabled or not"""
|
|
# return CONFIG.y('ldap.enabled')
|
|
|
|
@staticmethod
|
|
def encode_pass(password):
|
|
"""Encodes a plain-text password so it can be used by AD"""
|
|
return '"{}"'.format(password).encode('utf-16-le')
|
|
|
|
def generate_filter(self, **fields):
|
|
"""Generate LDAP filter from **fields."""
|
|
filters = []
|
|
for item, value in fields.items():
|
|
filters.append("(%s=%s)" % (item, value))
|
|
ldap_filter = "(&%s)" % "".join(filters)
|
|
LOGGER.debug("Constructed filter: '%s'", ldap_filter)
|
|
return ldap_filter
|
|
|
|
def lookup(self, ldap_filter: str):
|
|
"""Search email in LDAP and return the DN.
|
|
Returns False if nothing was found."""
|
|
try:
|
|
self._connection.search(self._source.search_base, ldap_filter)
|
|
results = self._connection.response
|
|
if len(results) >= 1:
|
|
if 'dn' in results[0]:
|
|
return str(results[0]['dn'])
|
|
except ldap3.core.exceptions.LDAPNoSuchObjectResult as exc:
|
|
LOGGER.warning(exc)
|
|
return False
|
|
except ldap3.core.exceptions.LDAPInvalidDnError as exc:
|
|
LOGGER.warning(exc)
|
|
return False
|
|
return False
|
|
|
|
def _get_or_create_user(self, user_data):
|
|
"""Returns a Django user for the given LDAP user data.
|
|
If the user does not exist, then it will be created."""
|
|
attributes = user_data.get("attributes")
|
|
if attributes is None:
|
|
LOGGER.warning("LDAP user attributes empty")
|
|
return None
|
|
# Create the user data.
|
|
field_map = {
|
|
'username': '%(' + USERNAME_FIELD + ')s',
|
|
'name': '%(givenName)s %(sn)s',
|
|
'email': '%(mail)s',
|
|
}
|
|
user_fields = {}
|
|
for dj_field, ldap_field in field_map.items():
|
|
user_fields[dj_field] = ldap_field % attributes
|
|
|
|
# Update or create the user.
|
|
user, created = User.objects.update_or_create(
|
|
defaults=user_fields,
|
|
username=user_fields.pop('username', "")
|
|
)
|
|
|
|
# Update groups
|
|
# if 'memberOf' in attributes:
|
|
# applicable_groups = LDAPGroupMapping.objects.f
|
|
# ilter(ldap_dn__in=attributes['memberOf'])
|
|
# for group in applicable_groups:
|
|
# if group.group not in user.groups.all():
|
|
# user.groups.add(group.group)
|
|
# user.save()
|
|
|
|
# If the user was created, set them an unusable password.
|
|
if created:
|
|
user.set_unusable_password()
|
|
user.save()
|
|
# All done!
|
|
LOGGER.debug("LDAP user lookup succeeded")
|
|
return user
|
|
|
|
def auth_user(self, password, **filters):
|
|
"""Try to bind as either user_dn or mail with password.
|
|
Returns True on success, otherwise False"""
|
|
filters.pop('request')
|
|
if not self._source.enabled:
|
|
return None
|
|
# FIXME: Adapt user_uid
|
|
# email = filters.pop(CONFIG.get('passport').get('ldap').get, '')
|
|
email = filters.pop('email')
|
|
user_dn = self.lookup(self.generate_filter(**{LOGIN_FIELD: email}))
|
|
if not user_dn:
|
|
return None
|
|
# Try to bind as new user
|
|
LOGGER.debug("Binding as '%s'", user_dn)
|
|
try:
|
|
temp_connection = ldap3.Connection(self._server, user=user_dn,
|
|
password=password, raise_exceptions=True)
|
|
temp_connection.bind()
|
|
if self._connection.search(
|
|
search_base=self._source.search_base,
|
|
search_filter=self.generate_filter(**{LOGIN_FIELD: email}),
|
|
search_scope=ldap3.SUBTREE,
|
|
attributes=[ldap3.ALL_ATTRIBUTES, ldap3.ALL_OPERATIONAL_ATTRIBUTES],
|
|
get_operational_attributes=True,
|
|
size_limit=1,
|
|
):
|
|
response = self._connection.response[0]
|
|
# If user has no email set in AD, use UPN
|
|
if 'mail' not in response.get('attributes'):
|
|
response['attributes']['mail'] = response['attributes']['userPrincipalName']
|
|
return self._get_or_create_user(response)
|
|
LOGGER.warning("LDAP user lookup failed")
|
|
return None
|
|
except ldap3.core.exceptions.LDAPInvalidCredentialsResult as exception:
|
|
LOGGER.debug("User '%s' failed to login (Wrong credentials)", user_dn)
|
|
except ldap3.core.exceptions.LDAPException as exception:
|
|
LOGGER.warning(exception)
|
|
return None
|
|
|
|
def is_email_used(self, mail):
|
|
"""Checks whether an email address is already registered in LDAP"""
|
|
if self._source.create_user:
|
|
return self.lookup(self.generate_filter(mail=mail))
|
|
return False
|
|
|
|
def create_ldap_user(self, user, raw_password):
|
|
"""Creates a new LDAP User from a django user and raw_password.
|
|
Returns True on success, otherwise False"""
|
|
if self._source.create_user:
|
|
LOGGER.debug("User creation not enabled")
|
|
return False
|
|
# The dn of our new entry/object
|
|
username = user.pk.hex # UUID without dashes
|
|
# sAMAccountName is limited to 20 chars
|
|
# https://msdn.microsoft.com/en-us/library/ms679635.aspx
|
|
username_trunk = username[:20] if len(username) > 20 else username
|
|
# AD doesn't like sAMAccountName's with . at the end
|
|
username_trunk = username_trunk[:-1] if username_trunk[-1] == '.' else username_trunk
|
|
user_dn = 'cn=' + username + ',' + self._source.search_base
|
|
LOGGER.debug('New DN: %s', user_dn)
|
|
attrs = {
|
|
'distinguishedName': str(user_dn),
|
|
'cn': str(username),
|
|
'description': str('t=' + time()),
|
|
'sAMAccountName': str(username_trunk),
|
|
'givenName': str(user.name),
|
|
'displayName': str(user.username),
|
|
'name': str(user.name),
|
|
'mail': str(user.email),
|
|
'userPrincipalName': str(username + '@' + self._source.domain),
|
|
'objectClass': ['top', 'person', 'organizationalPerson', 'user'],
|
|
}
|
|
try:
|
|
self._connection.add(user_dn, attributes=attrs)
|
|
except ldap3.core.exceptions.LDAPException as exception:
|
|
LOGGER.warning("Failed to create user ('%s'), saved to DB", exception)
|
|
# LDAPConnector.handle_ldap_error(user_dn, LDAPModification.ACTION_ADD, attrs)
|
|
LOGGER.debug("Signed up user %s", user.email)
|
|
return self.change_password(raw_password, mail=user.email)
|
|
|
|
def _do_modify(self, diff, **fields):
|
|
"""Do the LDAP modification itself"""
|
|
user_dn = self.lookup(self.generate_filter(**fields))
|
|
try:
|
|
self._connection.modify(user_dn, diff)
|
|
except ldap3.core.exceptions.LDAPException as exception:
|
|
LOGGER.warning("Failed to modify %s ('%s'), saved to DB", user_dn, exception)
|
|
# LDAPConnector.handle_ldap_error(user_dn, LDAPModification.ACTION_MODIFY, diff)
|
|
LOGGER.debug("modified account '%s' [%s]", user_dn, ','.join(diff.keys()))
|
|
return 'result' in self._connection.result and self._connection.result['result'] == 0
|
|
|
|
def disable_user(self, **fields):
|
|
"""Disables LDAP user based on mail or user_dn.
|
|
Returns True on success, otherwise False"""
|
|
diff = {
|
|
'userAccountControl': [(ldap3.MODIFY_REPLACE, [str(66050)])],
|
|
}
|
|
return self._do_modify(diff, **fields)
|
|
|
|
def enable_user(self, **fields):
|
|
"""Enables LDAP user based on mail or user_dn.
|
|
Returns True on success, otherwise False"""
|
|
diff = {
|
|
'userAccountControl': [(ldap3.MODIFY_REPLACE, [str(66048)])],
|
|
}
|
|
return self._do_modify(diff, **fields)
|
|
|
|
def change_password(self, new_password, **fields):
|
|
"""Changes LDAP user's password based on mail or user_dn.
|
|
Returns True on success, otherwise False"""
|
|
diff = {
|
|
'unicodePwd': [(ldap3.MODIFY_REPLACE, [LDAPConnector.encode_pass(new_password)])],
|
|
}
|
|
return self._do_modify(diff, **fields)
|
|
|
|
def add_to_group(self, group_dn, **fields):
|
|
"""Adds mail or user_dn to group_dn
|
|
Returns True on success, otherwise False"""
|
|
user_dn = self.lookup(**fields)
|
|
diff = {
|
|
'member': [(ldap3.MODIFY_ADD), [user_dn]]
|
|
}
|
|
return self._do_modify(diff, user_dn=group_dn)
|
|
|
|
def remove_from_group(self, group_dn, **fields):
|
|
"""Removes mail or user_dn from group_dn
|
|
Returns True on success, otherwise False"""
|
|
user_dn = self.lookup(**fields)
|
|
diff = {
|
|
'member': [(ldap3.MODIFY_DELETE), [user_dn]]
|
|
}
|
|
return self._do_modify(diff, user_dn=group_dn)
|