|
|
# -*- coding: utf-8 -*-
|
|
|
|
|
|
# Copyright (C) 2010-2018 RhodeCode GmbH
|
|
|
#
|
|
|
# This program is free software: you can redistribute it and/or modify
|
|
|
# it under the terms of the GNU Affero General Public License, version 3
|
|
|
# (only), as published by the Free Software Foundation.
|
|
|
#
|
|
|
# This program is distributed in the hope that it will be useful,
|
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
# GNU General Public License for more details.
|
|
|
#
|
|
|
# You should have received a copy of the GNU Affero General Public License
|
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
#
|
|
|
# This program is dual-licensed. If you wish to learn more about the
|
|
|
# RhodeCode Enterprise Edition, including its added features, Support services,
|
|
|
# and proprietary license terms, please see https://rhodecode.com/licenses/
|
|
|
|
|
|
"""
|
|
|
RhodeCode authentication plugin for LDAP
|
|
|
"""
|
|
|
|
|
|
import re
|
|
|
import colander
|
|
|
import logging
|
|
|
import traceback
|
|
|
import string
|
|
|
|
|
|
from rhodecode.translation import _
|
|
|
from rhodecode.authentication.base import (
|
|
|
RhodeCodeExternalAuthPlugin, chop_at, hybrid_property)
|
|
|
from rhodecode.authentication.schema import AuthnPluginSettingsSchemaBase
|
|
|
from rhodecode.authentication.routes import AuthnPluginResourceBase
|
|
|
from rhodecode.lib.colander_utils import strip_whitespace
|
|
|
from rhodecode.lib.exceptions import (
|
|
|
LdapConnectionError, LdapUsernameError, LdapPasswordError, LdapImportError
|
|
|
)
|
|
|
from rhodecode.lib.utils2 import safe_unicode, safe_str
|
|
|
from rhodecode.model.db import User
|
|
|
from rhodecode.model.validators import Missing
|
|
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
try:
|
|
|
import ldap
|
|
|
except ImportError:
|
|
|
# means that python-ldap is not installed, we use Missing object to mark
|
|
|
# ldap lib is Missing
|
|
|
ldap = Missing
|
|
|
|
|
|
|
|
|
class LdapError(Exception):
|
|
|
pass
|
|
|
|
|
|
def plugin_factory(plugin_id, *args, **kwds):
|
|
|
"""
|
|
|
Factory function that is called during plugin discovery.
|
|
|
It returns the plugin instance.
|
|
|
"""
|
|
|
plugin = RhodeCodeAuthPlugin(plugin_id)
|
|
|
return plugin
|
|
|
|
|
|
|
|
|
class LdapAuthnResource(AuthnPluginResourceBase):
|
|
|
pass
|
|
|
|
|
|
|
|
|
class LdapSettingsSchema(AuthnPluginSettingsSchemaBase):
|
|
|
tls_kind_choices = ['PLAIN', 'LDAPS', 'START_TLS']
|
|
|
tls_reqcert_choices = ['NEVER', 'ALLOW', 'TRY', 'DEMAND', 'HARD']
|
|
|
search_scope_choices = ['BASE', 'ONELEVEL', 'SUBTREE']
|
|
|
|
|
|
host = colander.SchemaNode(
|
|
|
colander.String(),
|
|
|
default='',
|
|
|
description=_('Host[s] of the LDAP Server \n'
|
|
|
'(e.g., 192.168.2.154, or ldap-server.domain.com.\n '
|
|
|
'Multiple servers can be specified using commas'),
|
|
|
preparer=strip_whitespace,
|
|
|
title=_('LDAP Host'),
|
|
|
widget='string')
|
|
|
port = colander.SchemaNode(
|
|
|
colander.Int(),
|
|
|
default=389,
|
|
|
description=_('Custom port that the LDAP server is listening on. '
|
|
|
'Default value is: 389'),
|
|
|
preparer=strip_whitespace,
|
|
|
title=_('Port'),
|
|
|
validator=colander.Range(min=0, max=65536),
|
|
|
widget='int')
|
|
|
dn_user = colander.SchemaNode(
|
|
|
colander.String(),
|
|
|
default='',
|
|
|
description=_('Optional user DN/account to connect to LDAP if authentication is required. \n'
|
|
|
'e.g., cn=admin,dc=mydomain,dc=com, or '
|
|
|
'uid=root,cn=users,dc=mydomain,dc=com, or admin@mydomain.com'),
|
|
|
missing='',
|
|
|
preparer=strip_whitespace,
|
|
|
title=_('Account'),
|
|
|
widget='string')
|
|
|
dn_pass = colander.SchemaNode(
|
|
|
colander.String(),
|
|
|
default='',
|
|
|
description=_('Password to authenticate for given user DN.'),
|
|
|
missing='',
|
|
|
preparer=strip_whitespace,
|
|
|
title=_('Password'),
|
|
|
widget='password')
|
|
|
tls_kind = colander.SchemaNode(
|
|
|
colander.String(),
|
|
|
default=tls_kind_choices[0],
|
|
|
description=_('TLS Type'),
|
|
|
title=_('Connection Security'),
|
|
|
validator=colander.OneOf(tls_kind_choices),
|
|
|
widget='select')
|
|
|
tls_reqcert = colander.SchemaNode(
|
|
|
colander.String(),
|
|
|
default=tls_reqcert_choices[0],
|
|
|
description=_('Require Cert over TLS?. Self-signed and custom '
|
|
|
'certificates can be used when\n `RhodeCode Certificate` '
|
|
|
'found in admin > settings > system info page is extended.'),
|
|
|
title=_('Certificate Checks'),
|
|
|
validator=colander.OneOf(tls_reqcert_choices),
|
|
|
widget='select')
|
|
|
base_dn = colander.SchemaNode(
|
|
|
colander.String(),
|
|
|
default='',
|
|
|
description=_('Base DN to search. Dynamic bind is supported. Add `$login` marker '
|
|
|
'in it to be replaced with current user credentials \n'
|
|
|
'(e.g., dc=mydomain,dc=com, or ou=Users,dc=mydomain,dc=com)'),
|
|
|
missing='',
|
|
|
preparer=strip_whitespace,
|
|
|
title=_('Base DN'),
|
|
|
widget='string')
|
|
|
filter = colander.SchemaNode(
|
|
|
colander.String(),
|
|
|
default='',
|
|
|
description=_('Filter to narrow results \n'
|
|
|
'(e.g., (&(objectCategory=Person)(objectClass=user)), or \n'
|
|
|
'(memberof=cn=rc-login,ou=groups,ou=company,dc=mydomain,dc=com)))'),
|
|
|
missing='',
|
|
|
preparer=strip_whitespace,
|
|
|
title=_('LDAP Search Filter'),
|
|
|
widget='string')
|
|
|
|
|
|
search_scope = colander.SchemaNode(
|
|
|
colander.String(),
|
|
|
default=search_scope_choices[2],
|
|
|
description=_('How deep to search LDAP. If unsure set to SUBTREE'),
|
|
|
title=_('LDAP Search Scope'),
|
|
|
validator=colander.OneOf(search_scope_choices),
|
|
|
widget='select')
|
|
|
attr_login = colander.SchemaNode(
|
|
|
colander.String(),
|
|
|
default='uid',
|
|
|
description=_('LDAP Attribute to map to user name (e.g., uid, or sAMAccountName)'),
|
|
|
preparer=strip_whitespace,
|
|
|
title=_('Login Attribute'),
|
|
|
missing_msg=_('The LDAP Login attribute of the CN must be specified'),
|
|
|
widget='string')
|
|
|
attr_firstname = colander.SchemaNode(
|
|
|
colander.String(),
|
|
|
default='',
|
|
|
description=_('LDAP Attribute to map to first name (e.g., givenName)'),
|
|
|
missing='',
|
|
|
preparer=strip_whitespace,
|
|
|
title=_('First Name Attribute'),
|
|
|
widget='string')
|
|
|
attr_lastname = colander.SchemaNode(
|
|
|
colander.String(),
|
|
|
default='',
|
|
|
description=_('LDAP Attribute to map to last name (e.g., sn)'),
|
|
|
missing='',
|
|
|
preparer=strip_whitespace,
|
|
|
title=_('Last Name Attribute'),
|
|
|
widget='string')
|
|
|
attr_email = colander.SchemaNode(
|
|
|
colander.String(),
|
|
|
default='',
|
|
|
description=_('LDAP Attribute to map to email address (e.g., mail).\n'
|
|
|
'Emails are a crucial part of RhodeCode. \n'
|
|
|
'If possible add a valid email attribute to ldap users.'),
|
|
|
missing='',
|
|
|
preparer=strip_whitespace,
|
|
|
title=_('Email Attribute'),
|
|
|
widget='string')
|
|
|
|
|
|
|
|
|
class AuthLdap(object):
|
|
|
|
|
|
def _build_servers(self):
|
|
|
return ', '.join(
|
|
|
["{}://{}:{}".format(
|
|
|
self.ldap_server_type, host.strip(), self.LDAP_SERVER_PORT)
|
|
|
for host in self.SERVER_ADDRESSES])
|
|
|
|
|
|
def __init__(self, server, base_dn, port=389, bind_dn='', bind_pass='',
|
|
|
tls_kind='PLAIN', tls_reqcert='DEMAND', ldap_version=3,
|
|
|
search_scope='SUBTREE', attr_login='uid',
|
|
|
ldap_filter=''):
|
|
|
if ldap == Missing:
|
|
|
raise LdapImportError("Missing or incompatible ldap library")
|
|
|
|
|
|
self.debug = False
|
|
|
self.ldap_version = ldap_version
|
|
|
self.ldap_server_type = 'ldap'
|
|
|
|
|
|
self.TLS_KIND = tls_kind
|
|
|
|
|
|
if self.TLS_KIND == 'LDAPS':
|
|
|
port = port or 689
|
|
|
self.ldap_server_type += 's'
|
|
|
|
|
|
OPT_X_TLS_DEMAND = 2
|
|
|
self.TLS_REQCERT = getattr(ldap, 'OPT_X_TLS_%s' % tls_reqcert,
|
|
|
OPT_X_TLS_DEMAND)
|
|
|
# split server into list
|
|
|
self.SERVER_ADDRESSES = server.split(',')
|
|
|
self.LDAP_SERVER_PORT = port
|
|
|
|
|
|
# USE FOR READ ONLY BIND TO LDAP SERVER
|
|
|
self.attr_login = attr_login
|
|
|
|
|
|
self.LDAP_BIND_DN = safe_str(bind_dn)
|
|
|
self.LDAP_BIND_PASS = safe_str(bind_pass)
|
|
|
self.LDAP_SERVER = self._build_servers()
|
|
|
self.SEARCH_SCOPE = getattr(ldap, 'SCOPE_%s' % search_scope)
|
|
|
self.BASE_DN = safe_str(base_dn)
|
|
|
self.LDAP_FILTER = safe_str(ldap_filter)
|
|
|
|
|
|
def _get_ldap_conn(self):
|
|
|
if self.debug:
|
|
|
ldap.set_option(ldap.OPT_DEBUG_LEVEL, 255)
|
|
|
|
|
|
if hasattr(ldap, 'OPT_X_TLS_CACERTDIR'):
|
|
|
ldap.set_option(ldap.OPT_X_TLS_CACERTDIR,
|
|
|
'/etc/openldap/cacerts')
|
|
|
ldap.set_option(ldap.OPT_REFERRALS, ldap.OPT_OFF)
|
|
|
ldap.set_option(ldap.OPT_RESTART, ldap.OPT_ON)
|
|
|
ldap.set_option(ldap.OPT_NETWORK_TIMEOUT, 60 * 10)
|
|
|
ldap.set_option(ldap.OPT_TIMEOUT, 60 * 10)
|
|
|
|
|
|
if self.TLS_KIND != 'PLAIN':
|
|
|
ldap.set_option(ldap.OPT_X_TLS_REQUIRE_CERT, self.TLS_REQCERT)
|
|
|
|
|
|
log.debug('initializing LDAP connection to:%s', self.LDAP_SERVER)
|
|
|
ldap_conn = ldap.initialize(self.LDAP_SERVER)
|
|
|
if self.ldap_version == 2:
|
|
|
ldap_conn.protocol = ldap.VERSION2
|
|
|
else:
|
|
|
ldap_conn.protocol = ldap.VERSION3
|
|
|
|
|
|
if self.TLS_KIND == 'START_TLS':
|
|
|
ldap_conn.start_tls_s()
|
|
|
|
|
|
if self.LDAP_BIND_DN and self.LDAP_BIND_PASS:
|
|
|
log.debug('Trying simple_bind with password and given login DN: %s',
|
|
|
self.LDAP_BIND_DN)
|
|
|
ldap_conn.simple_bind_s(self.LDAP_BIND_DN, self.LDAP_BIND_PASS)
|
|
|
|
|
|
return ldap_conn
|
|
|
|
|
|
def get_uid(self, username):
|
|
|
uid = username
|
|
|
for server_addr in self.SERVER_ADDRESSES:
|
|
|
uid = chop_at(username, "@%s" % server_addr)
|
|
|
return uid
|
|
|
|
|
|
def fetch_attrs_from_simple_bind(self, server, dn, username, password):
|
|
|
try:
|
|
|
log.debug('Trying simple bind with %s', dn)
|
|
|
server.simple_bind_s(dn, safe_str(password))
|
|
|
user = server.search_ext_s(
|
|
|
dn, ldap.SCOPE_BASE, '(objectClass=*)', )[0]
|
|
|
_, attrs = user
|
|
|
return attrs
|
|
|
|
|
|
except ldap.INVALID_CREDENTIALS:
|
|
|
log.debug(
|
|
|
"LDAP rejected password for user '%s': %s, org_exc:",
|
|
|
username, dn, exc_info=True)
|
|
|
|
|
|
def authenticate_ldap(self, username, password):
|
|
|
"""
|
|
|
Authenticate a user via LDAP and return his/her LDAP properties.
|
|
|
|
|
|
Raises AuthenticationError if the credentials are rejected, or
|
|
|
EnvironmentError if the LDAP server can't be reached.
|
|
|
|
|
|
:param username: username
|
|
|
:param password: password
|
|
|
"""
|
|
|
|
|
|
uid = self.get_uid(username)
|
|
|
|
|
|
if not password:
|
|
|
msg = "Authenticating user %s with blank password not allowed"
|
|
|
log.warning(msg, username)
|
|
|
raise LdapPasswordError(msg)
|
|
|
if "," in username:
|
|
|
raise LdapUsernameError(
|
|
|
"invalid character `,` in username: `{}`".format(username))
|
|
|
ldap_conn = None
|
|
|
try:
|
|
|
ldap_conn = self._get_ldap_conn()
|
|
|
filter_ = '(&%s(%s=%s))' % (
|
|
|
self.LDAP_FILTER, self.attr_login, username)
|
|
|
log.debug("Authenticating %r filter %s at %s", self.BASE_DN,
|
|
|
filter_, self.LDAP_SERVER)
|
|
|
lobjects = ldap_conn.search_ext_s(
|
|
|
self.BASE_DN, self.SEARCH_SCOPE, filter_)
|
|
|
|
|
|
if not lobjects:
|
|
|
log.debug("No matching LDAP objects for authentication "
|
|
|
"of UID:'%s' username:(%s)", uid, username)
|
|
|
raise ldap.NO_SUCH_OBJECT()
|
|
|
|
|
|
log.debug('Found matching ldap object, trying to authenticate')
|
|
|
for (dn, _attrs) in lobjects:
|
|
|
if dn is None:
|
|
|
continue
|
|
|
|
|
|
user_attrs = self.fetch_attrs_from_simple_bind(
|
|
|
ldap_conn, dn, username, password)
|
|
|
if user_attrs:
|
|
|
break
|
|
|
|
|
|
else:
|
|
|
raise LdapPasswordError(
|
|
|
'Failed to authenticate user `{}`'
|
|
|
'with given password'.format(username))
|
|
|
|
|
|
except ldap.NO_SUCH_OBJECT:
|
|
|
log.debug("LDAP says no such user '%s' (%s), org_exc:",
|
|
|
uid, username, exc_info=True)
|
|
|
raise LdapUsernameError('Unable to find user')
|
|
|
except ldap.SERVER_DOWN:
|
|
|
org_exc = traceback.format_exc()
|
|
|
raise LdapConnectionError(
|
|
|
"LDAP can't access authentication "
|
|
|
"server, org_exc:%s" % org_exc)
|
|
|
finally:
|
|
|
if ldap_conn:
|
|
|
log.debug('ldap: connection release')
|
|
|
try:
|
|
|
ldap_conn.unbind_s()
|
|
|
except Exception:
|
|
|
# for any reason this can raise exception we must catch it
|
|
|
# to not crush the server
|
|
|
pass
|
|
|
|
|
|
return dn, user_attrs
|
|
|
|
|
|
|
|
|
class RhodeCodeAuthPlugin(RhodeCodeExternalAuthPlugin):
|
|
|
# used to define dynamic binding in the
|
|
|
DYNAMIC_BIND_VAR = '$login'
|
|
|
_settings_unsafe_keys = ['dn_pass']
|
|
|
|
|
|
def includeme(self, config):
|
|
|
config.add_authn_plugin(self)
|
|
|
config.add_authn_resource(self.get_id(), LdapAuthnResource(self))
|
|
|
config.add_view(
|
|
|
'rhodecode.authentication.views.AuthnPluginViewBase',
|
|
|
attr='settings_get',
|
|
|
renderer='rhodecode:templates/admin/auth/plugin_settings.mako',
|
|
|
request_method='GET',
|
|
|
route_name='auth_home',
|
|
|
context=LdapAuthnResource)
|
|
|
config.add_view(
|
|
|
'rhodecode.authentication.views.AuthnPluginViewBase',
|
|
|
attr='settings_post',
|
|
|
renderer='rhodecode:templates/admin/auth/plugin_settings.mako',
|
|
|
request_method='POST',
|
|
|
route_name='auth_home',
|
|
|
context=LdapAuthnResource)
|
|
|
|
|
|
def get_settings_schema(self):
|
|
|
return LdapSettingsSchema()
|
|
|
|
|
|
def get_display_name(self):
|
|
|
return _('LDAP')
|
|
|
|
|
|
@hybrid_property
|
|
|
def name(self):
|
|
|
return "ldap"
|
|
|
|
|
|
def use_fake_password(self):
|
|
|
return True
|
|
|
|
|
|
def user_activation_state(self):
|
|
|
def_user_perms = User.get_default_user().AuthUser().permissions['global']
|
|
|
return 'hg.extern_activate.auto' in def_user_perms
|
|
|
|
|
|
def try_dynamic_binding(self, username, password, current_args):
|
|
|
"""
|
|
|
Detects marker inside our original bind, and uses dynamic auth if
|
|
|
present
|
|
|
"""
|
|
|
|
|
|
org_bind = current_args['bind_dn']
|
|
|
passwd = current_args['bind_pass']
|
|
|
|
|
|
def has_bind_marker(username):
|
|
|
if self.DYNAMIC_BIND_VAR in username:
|
|
|
return True
|
|
|
|
|
|
# we only passed in user with "special" variable
|
|
|
if org_bind and has_bind_marker(org_bind) and not passwd:
|
|
|
log.debug('Using dynamic user/password binding for ldap '
|
|
|
'authentication. Replacing `%s` with username',
|
|
|
self.DYNAMIC_BIND_VAR)
|
|
|
current_args['bind_dn'] = org_bind.replace(
|
|
|
self.DYNAMIC_BIND_VAR, username)
|
|
|
current_args['bind_pass'] = password
|
|
|
|
|
|
return current_args
|
|
|
|
|
|
def auth(self, userobj, username, password, settings, **kwargs):
|
|
|
"""
|
|
|
Given a user object (which may be null), username, a plaintext password,
|
|
|
and a settings object (containing all the keys needed as listed in
|
|
|
settings()), authenticate this user's login attempt.
|
|
|
|
|
|
Return None on failure. On success, return a dictionary of the form:
|
|
|
|
|
|
see: RhodeCodeAuthPluginBase.auth_func_attrs
|
|
|
This is later validated for correctness
|
|
|
"""
|
|
|
|
|
|
if not username or not password:
|
|
|
log.debug('Empty username or password skipping...')
|
|
|
return None
|
|
|
|
|
|
ldap_args = {
|
|
|
'server': settings.get('host', ''),
|
|
|
'base_dn': settings.get('base_dn', ''),
|
|
|
'port': settings.get('port'),
|
|
|
'bind_dn': settings.get('dn_user'),
|
|
|
'bind_pass': settings.get('dn_pass'),
|
|
|
'tls_kind': settings.get('tls_kind'),
|
|
|
'tls_reqcert': settings.get('tls_reqcert'),
|
|
|
'search_scope': settings.get('search_scope'),
|
|
|
'attr_login': settings.get('attr_login'),
|
|
|
'ldap_version': 3,
|
|
|
'ldap_filter': settings.get('filter'),
|
|
|
}
|
|
|
|
|
|
ldap_attrs = self.try_dynamic_binding(username, password, ldap_args)
|
|
|
|
|
|
log.debug('Checking for ldap authentication.')
|
|
|
|
|
|
try:
|
|
|
aldap = AuthLdap(**ldap_args)
|
|
|
(user_dn, ldap_attrs) = aldap.authenticate_ldap(username, password)
|
|
|
log.debug('Got ldap DN response %s', user_dn)
|
|
|
|
|
|
def get_ldap_attr(k):
|
|
|
return ldap_attrs.get(settings.get(k), [''])[0]
|
|
|
|
|
|
# old attrs fetched from RhodeCode database
|
|
|
admin = getattr(userobj, 'admin', False)
|
|
|
active = getattr(userobj, 'active', True)
|
|
|
email = getattr(userobj, 'email', '')
|
|
|
username = getattr(userobj, 'username', username)
|
|
|
firstname = getattr(userobj, 'firstname', '')
|
|
|
lastname = getattr(userobj, 'lastname', '')
|
|
|
extern_type = getattr(userobj, 'extern_type', '')
|
|
|
|
|
|
groups = []
|
|
|
user_attrs = {
|
|
|
'username': username,
|
|
|
'firstname': safe_unicode(
|
|
|
get_ldap_attr('attr_firstname') or firstname),
|
|
|
'lastname': safe_unicode(
|
|
|
get_ldap_attr('attr_lastname') or lastname),
|
|
|
'groups': groups,
|
|
|
'user_group_sync': False,
|
|
|
'email': get_ldap_attr('attr_email') or email,
|
|
|
'admin': admin,
|
|
|
'active': active,
|
|
|
'active_from_extern': None,
|
|
|
'extern_name': user_dn,
|
|
|
'extern_type': extern_type,
|
|
|
}
|
|
|
log.debug('ldap user: %s', user_attrs)
|
|
|
log.info('user %s authenticated correctly', user_attrs['username'])
|
|
|
|
|
|
return user_attrs
|
|
|
|
|
|
except (LdapUsernameError, LdapPasswordError, LdapImportError):
|
|
|
log.exception("LDAP related exception")
|
|
|
return None
|
|
|
except (Exception,):
|
|
|
log.exception("Other exception")
|
|
|
return None
|
|
|
|
