diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py
index b38f81e999..968095c141 100644
--- a/synapse/handlers/auth.py
+++ b/synapse/handlers/auth.py
@@ -20,6 +20,7 @@ from synapse.api.constants import LoginType
from synapse.types import UserID
from synapse.api.errors import AuthError, LoginError, Codes, StoreError, SynapseError
from synapse.util.async import run_on_reactor
+from synapse.config.ldap import LDAPMode
from twisted.web.client import PartialDownloadError
@@ -28,6 +29,12 @@ import bcrypt
import pymacaroons
import simplejson
+try:
+ import ldap3
+except ImportError:
+ ldap3 = None
+ pass
+
import synapse.util.stringutils as stringutils
@@ -50,17 +57,20 @@ class AuthHandler(BaseHandler):
self.INVALID_TOKEN_HTTP_STATUS = 401
self.ldap_enabled = hs.config.ldap_enabled
- self.ldap_server = hs.config.ldap_server
- self.ldap_port = hs.config.ldap_port
- self.ldap_tls = hs.config.ldap_tls
- self.ldap_search_base = hs.config.ldap_search_base
- self.ldap_search_property = hs.config.ldap_search_property
- self.ldap_email_property = hs.config.ldap_email_property
- self.ldap_full_name_property = hs.config.ldap_full_name_property
-
- if self.ldap_enabled is True:
- import ldap
- logger.info("Import ldap version: %s", ldap.__version__)
+ if self.ldap_enabled:
+ if not ldap3:
+ raise RuntimeError(
+ 'Missing ldap3 library. This is required for LDAP Authentication.'
+ )
+ self.ldap_mode = hs.config.ldap_mode
+ self.ldap_uri = hs.config.ldap_uri
+ self.ldap_start_tls = hs.config.ldap_start_tls
+ self.ldap_base = hs.config.ldap_base
+ self.ldap_filter = hs.config.ldap_filter
+ self.ldap_attributes = hs.config.ldap_attributes
+ if self.ldap_mode == LDAPMode.SEARCH:
+ self.ldap_bind_dn = hs.config.ldap_bind_dn
+ self.ldap_bind_password = hs.config.ldap_bind_password
self.hs = hs # FIXME better possibility to access registrationHandler later?
@@ -452,40 +462,167 @@ class AuthHandler(BaseHandler):
@defer.inlineCallbacks
def _check_ldap_password(self, user_id, password):
- if not self.ldap_enabled:
- logger.debug("LDAP not configured")
+ """ Attempt to authenticate a user against an LDAP Server
+ and register an account if none exists.
+
+ Returns:
+ True if authentication against LDAP was successful
+ """
+
+ if not ldap3 or not self.ldap_enabled:
defer.returnValue(False)
- import ldap
+ if self.ldap_mode not in LDAPMode.LIST:
+ raise RuntimeError(
+ 'Invalid ldap mode specified: {mode}'.format(
+ mode=self.ldap_mode
+ )
+ )
- logger.info("Authenticating %s with LDAP" % user_id)
try:
- ldap_url = "%s:%s" % (self.ldap_server, self.ldap_port)
- logger.debug("Connecting LDAP server at %s" % ldap_url)
- l = ldap.initialize(ldap_url)
- if self.ldap_tls:
- logger.debug("Initiating TLS")
- self._connection.start_tls_s()
+ server = ldap3.Server(self.ldap_uri)
+ logger.debug(
+ "Attempting ldap connection with %s",
+ self.ldap_uri
+ )
- local_name = UserID.from_string(user_id).localpart
+ localpart = UserID.from_string(user_id).localpart
+ if self.ldap_mode == LDAPMode.SIMPLE:
+ # bind with the the local users ldap credentials
+ bind_dn = "{prop}={value},{base}".format(
+ prop=self.ldap_attributes['uid'],
+ value=localpart,
+ base=self.ldap_base
+ )
+ conn = ldap3.Connection(server, bind_dn, password)
+ logger.debug(
+ "Established ldap connection in simple mode: %s",
+ conn
+ )
- dn = "%s=%s, %s" % (
- self.ldap_search_property,
- local_name,
- self.ldap_search_base)
- logger.debug("DN for LDAP authentication: %s" % dn)
+ if self.ldap_start_tls:
+ conn.start_tls()
+ logger.debug(
+ "Upgraded ldap connection in simple mode through StartTLS: %s",
+ conn
+ )
+
+ conn.bind()
+
+ elif self.ldap_mode == LDAPMode.SEARCH:
+ # connect with preconfigured credentials and search for local user
+ conn = ldap3.Connection(
+ server,
+ self.ldap_bind_dn,
+ self.ldap_bind_password
+ )
+ logger.debug(
+ "Established ldap connection in search mode: %s",
+ conn
+ )
+
+ if self.ldap_start_tls:
+ conn.start_tls()
+ logger.debug(
+ "Upgraded ldap connection in search mode through StartTLS: %s",
+ conn
+ )
- l.simple_bind_s(dn.encode('utf-8'), password.encode('utf-8'))
+ conn.bind()
+ # find matching dn
+ query = "({prop}={value})".format(
+ prop=self.ldap_attributes['uid'],
+ value=localpart
+ )
+ if self.ldap_filter:
+ query = "(&{query}{filter})".format(
+ query=query,
+ filter=self.ldap_filter
+ )
+ logger.debug("ldap search filter: %s", query)
+ result = conn.search(self.ldap_base, query)
+
+ if result and len(conn.response) == 1:
+ # found exactly one result
+ user_dn = conn.response[0]['dn']
+ logger.debug('ldap search found dn: %s', user_dn)
+
+ # unbind and reconnect, rebind with found dn
+ conn.unbind()
+ conn = ldap3.Connection(
+ server,
+ user_dn,
+ password,
+ auto_bind=True
+ )
+ else:
+ # found 0 or > 1 results, abort!
+ logger.warn(
+ "ldap search returned unexpected (%d!=1) amount of results",
+ len(conn.response)
+ )
+ defer.returnValue(False)
+
+ logger.info(
+ "User authenticated against ldap server: %s",
+ conn
+ )
+
+ # check for existing account, if none exists, create one
if not (yield self.does_user_exist(user_id)):
- handler = self.hs.get_handlers().registration_handler
- user_id, access_token = (
- yield handler.register(localpart=local_name)
+ # query user metadata for account creation
+ query = "({prop}={value})".format(
+ prop=self.ldap_attributes['uid'],
+ value=localpart
+ )
+
+ if self.ldap_mode == LDAPMode.SEARCH and self.ldap_filter:
+ query = "(&{filter}{user_filter})".format(
+ filter=query,
+ user_filter=self.ldap_filter
+ )
+ logger.debug("ldap registration filter: %s", query)
+
+ result = conn.search(
+ search_base=self.ldap_base,
+ search_filter=query,
+ attributes=[
+ self.ldap_attributes['name'],
+ self.ldap_attributes['mail']
+ ]
)
+ if len(conn.response) == 1:
+ attrs = conn.response[0]['attributes']
+ mail = attrs[self.ldap_attributes['mail']][0]
+ name = attrs[self.ldap_attributes['name']][0]
+
+ # create account
+ registration_handler = self.hs.get_handlers().registration_handler
+ user_id, access_token = (
+ yield registration_handler.register(localpart=localpart)
+ )
+
+ # TODO: bind email, set displayname with data from ldap directory
+
+ logger.info(
+ "ldap registration successful: %d: %s (%s, %)",
+ user_id,
+ localpart,
+ name,
+ mail
+ )
+ else:
+ logger.warn(
+ "ldap registration failed: unexpected (%d!=1) amount of results",
+ len(result)
+ )
+ defer.returnValue(False)
+
defer.returnValue(True)
- except ldap.LDAPError, e:
- logger.warn("LDAP error: %s", e)
+ except ldap3.core.exceptions.LDAPException as e:
+ logger.warn("Error during ldap authentication: %s", e)
defer.returnValue(False)
@defer.inlineCallbacks
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