mirror of
https://git.anonymousland.org/anonymousland/synapse.git
synced 2024-10-01 11:49:51 -04:00
Merge pull request #1153 from matrix-org/erikj/ldap_restructure
Restructure ldap authentication
This commit is contained in:
commit
f7bcdbe56c
@ -31,6 +31,7 @@ import simplejson
|
||||
|
||||
try:
|
||||
import ldap3
|
||||
import ldap3.core.exceptions
|
||||
except ImportError:
|
||||
ldap3 = None
|
||||
pass
|
||||
@ -504,6 +505,144 @@ class AuthHandler(BaseHandler):
|
||||
raise LoginError(403, "", errcode=Codes.FORBIDDEN)
|
||||
defer.returnValue(user_id)
|
||||
|
||||
def _ldap_simple_bind(self, server, localpart, password):
|
||||
""" Attempt a simple bind with the credentials
|
||||
given by the user against the LDAP server.
|
||||
|
||||
Returns True, LDAP3Connection
|
||||
if the bind was successful
|
||||
Returns False, None
|
||||
if an error occured
|
||||
"""
|
||||
|
||||
try:
|
||||
# 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 bind mode: %s",
|
||||
conn
|
||||
)
|
||||
|
||||
if self.ldap_start_tls:
|
||||
conn.start_tls()
|
||||
logger.debug(
|
||||
"Upgraded LDAP connection in simple bind mode through StartTLS: %s",
|
||||
conn
|
||||
)
|
||||
|
||||
if conn.bind():
|
||||
# GOOD: bind okay
|
||||
logger.debug("LDAP Bind successful in simple bind mode.")
|
||||
return True, conn
|
||||
|
||||
# BAD: bind failed
|
||||
logger.info(
|
||||
"Binding against LDAP failed for '%s' failed: %s",
|
||||
localpart, conn.result['description']
|
||||
)
|
||||
conn.unbind()
|
||||
return False, None
|
||||
|
||||
except ldap3.core.exceptions.LDAPException as e:
|
||||
logger.warn("Error during LDAP authentication: %s", e)
|
||||
return False, None
|
||||
|
||||
def _ldap_authenticated_search(self, server, localpart, password):
|
||||
""" Attempt to login with the preconfigured bind_dn
|
||||
and then continue searching and filtering within
|
||||
the base_dn
|
||||
|
||||
Returns (True, LDAP3Connection)
|
||||
if a single matching DN within the base was found
|
||||
that matched the filter expression, and with which
|
||||
a successful bind was achieved
|
||||
|
||||
The LDAP3Connection returned is the instance that was used to
|
||||
verify the password not the one using the configured bind_dn.
|
||||
Returns (False, None)
|
||||
if an error occured
|
||||
"""
|
||||
|
||||
try:
|
||||
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
|
||||
)
|
||||
|
||||
if not conn.bind():
|
||||
logger.warn(
|
||||
"Binding against LDAP with `bind_dn` failed: %s",
|
||||
conn.result['description']
|
||||
)
|
||||
conn.unbind()
|
||||
return False, None
|
||||
|
||||
# construct search_filter like (uid=localpart)
|
||||
query = "({prop}={value})".format(
|
||||
prop=self.ldap_attributes['uid'],
|
||||
value=localpart
|
||||
)
|
||||
if self.ldap_filter:
|
||||
# combine with the AND expression
|
||||
query = "(&{query}{filter})".format(
|
||||
query=query,
|
||||
filter=self.ldap_filter
|
||||
)
|
||||
logger.debug(
|
||||
"LDAP search filter: %s",
|
||||
query
|
||||
)
|
||||
conn.search(
|
||||
search_base=self.ldap_base,
|
||||
search_filter=query
|
||||
)
|
||||
|
||||
if len(conn.response) == 1:
|
||||
# GOOD: found exactly one result
|
||||
user_dn = conn.response[0]['dn']
|
||||
logger.debug('LDAP search found dn: %s', user_dn)
|
||||
|
||||
# unbind and simple bind with user_dn to verify the password
|
||||
# Note: do not use rebind(), for some reason it did not verify
|
||||
# the password for me!
|
||||
conn.unbind()
|
||||
return self._ldap_simple_bind(server, localpart, password)
|
||||
else:
|
||||
# BAD: found 0 or > 1 results, abort!
|
||||
if len(conn.response) == 0:
|
||||
logger.info(
|
||||
"LDAP search returned no results for '%s'",
|
||||
localpart
|
||||
)
|
||||
else:
|
||||
logger.info(
|
||||
"LDAP search returned too many (%s) results for '%s'",
|
||||
len(conn.response), localpart
|
||||
)
|
||||
conn.unbind()
|
||||
return False, None
|
||||
|
||||
except ldap3.core.exceptions.LDAPException as e:
|
||||
logger.warn("Error during LDAP authentication: %s", e)
|
||||
return False, None
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def _check_ldap_password(self, user_id, password):
|
||||
""" Attempt to authenticate a user against an LDAP Server
|
||||
@ -516,106 +655,62 @@ class AuthHandler(BaseHandler):
|
||||
if not ldap3 or not self.ldap_enabled:
|
||||
defer.returnValue(False)
|
||||
|
||||
if self.ldap_mode not in LDAPMode.LIST:
|
||||
localpart = UserID.from_string(user_id).localpart
|
||||
|
||||
try:
|
||||
server = ldap3.Server(self.ldap_uri)
|
||||
logger.debug(
|
||||
"Attempting LDAP connection with %s",
|
||||
self.ldap_uri
|
||||
)
|
||||
|
||||
if self.ldap_mode == LDAPMode.SIMPLE:
|
||||
result, conn = self._ldap_simple_bind(
|
||||
server=server, localpart=localpart, password=password
|
||||
)
|
||||
logger.debug(
|
||||
'LDAP authentication method simple bind returned: %s (conn: %s)',
|
||||
result,
|
||||
conn
|
||||
)
|
||||
if not result:
|
||||
defer.returnValue(False)
|
||||
elif self.ldap_mode == LDAPMode.SEARCH:
|
||||
result, conn = self._ldap_authenticated_search(
|
||||
server=server, localpart=localpart, password=password
|
||||
)
|
||||
logger.debug(
|
||||
'LDAP auth method authenticated search returned: %s (conn: %s)',
|
||||
result,
|
||||
conn
|
||||
)
|
||||
if not result:
|
||||
defer.returnValue(False)
|
||||
else:
|
||||
raise RuntimeError(
|
||||
'Invalid ldap mode specified: {mode}'.format(
|
||||
'Invalid LDAP mode specified: {mode}'.format(
|
||||
mode=self.ldap_mode
|
||||
)
|
||||
)
|
||||
|
||||
try:
|
||||
server = ldap3.Server(self.ldap_uri)
|
||||
logger.debug(
|
||||
"Attempting ldap connection with %s",
|
||||
self.ldap_uri
|
||||
)
|
||||
|
||||
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",
|
||||
logger.info(
|
||||
"User authenticated against LDAP server: %s",
|
||||
conn
|
||||
)
|
||||
|
||||
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
|
||||
)
|
||||
|
||||
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)
|
||||
)
|
||||
except NameError:
|
||||
logger.warn("Authentication method yielded no LDAP connection, aborting!")
|
||||
defer.returnValue(False)
|
||||
|
||||
logger.info(
|
||||
"User authenticated against ldap server: %s",
|
||||
conn
|
||||
)
|
||||
# check if user with user_id exists
|
||||
if (yield self.check_user_exists(user_id)):
|
||||
# exists, authentication complete
|
||||
conn.unbind()
|
||||
defer.returnValue(True)
|
||||
|
||||
# check for existing account, if none exists, create one
|
||||
if not (yield self.check_user_exists(user_id)):
|
||||
# query user metadata for account creation
|
||||
else:
|
||||
# does not exist, fetch metadata for account creation from
|
||||
# existing ldap connection
|
||||
query = "({prop}={value})".format(
|
||||
prop=self.ldap_attributes['uid'],
|
||||
value=localpart
|
||||
@ -626,9 +721,12 @@ class AuthHandler(BaseHandler):
|
||||
filter=query,
|
||||
user_filter=self.ldap_filter
|
||||
)
|
||||
logger.debug("ldap registration filter: %s", query)
|
||||
logger.debug(
|
||||
"ldap registration filter: %s",
|
||||
query
|
||||
)
|
||||
|
||||
result = conn.search(
|
||||
conn.search(
|
||||
search_base=self.ldap_base,
|
||||
search_filter=query,
|
||||
attributes=[
|
||||
@ -651,20 +749,27 @@ class AuthHandler(BaseHandler):
|
||||
# TODO: bind email, set displayname with data from ldap directory
|
||||
|
||||
logger.info(
|
||||
"ldap registration successful: %d: %s (%s, %)",
|
||||
"Registration based on LDAP data was successful: %d: %s (%s, %)",
|
||||
user_id,
|
||||
localpart,
|
||||
name,
|
||||
mail
|
||||
)
|
||||
else:
|
||||
logger.warn(
|
||||
"ldap registration failed: unexpected (%d!=1) amount of results",
|
||||
len(conn.response)
|
||||
)
|
||||
defer.returnValue(False)
|
||||
|
||||
defer.returnValue(True)
|
||||
else:
|
||||
if len(conn.response) == 0:
|
||||
logger.warn("LDAP registration failed, no result.")
|
||||
else:
|
||||
logger.warn(
|
||||
"LDAP registration failed, too many results (%s)",
|
||||
len(conn.response)
|
||||
)
|
||||
|
||||
defer.returnValue(False)
|
||||
|
||||
defer.returnValue(False)
|
||||
|
||||
except ldap3.core.exceptions.LDAPException as e:
|
||||
logger.warn("Error during ldap authentication: %s", e)
|
||||
defer.returnValue(False)
|
||||
|
Loading…
Reference in New Issue
Block a user