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# -*- coding: utf-8 -*-
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# Copyright (C) 2010-2016 RhodeCode GmbH
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License, version 3
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# (only), as published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# This program is dual-licensed. If you wish to learn more about the
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# RhodeCode Enterprise Edition, including its added features, Support services,
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# and proprietary license terms, please see https://rhodecode.com/licenses/
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"""
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Authentication modules
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"""
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import colander
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import logging
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import time
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import traceback
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import warnings
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from pyramid.threadlocal import get_current_registry
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from sqlalchemy.ext.hybrid import hybrid_property
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from rhodecode.authentication.interface import IAuthnPluginRegistry
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from rhodecode.authentication.schema import AuthnPluginSettingsSchemaBase
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from rhodecode.lib import caches
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from rhodecode.lib.auth import PasswordGenerator, _RhodeCodeCryptoBCrypt
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from rhodecode.lib.utils2 import md5_safe, safe_int
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from rhodecode.lib.utils2 import safe_str
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from rhodecode.model.db import User
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from rhodecode.model.meta import Session
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from rhodecode.model.settings import SettingsModel
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from rhodecode.model.user import UserModel
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from rhodecode.model.user_group import UserGroupModel
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log = logging.getLogger(__name__)
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# auth types that authenticate() function can receive
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VCS_TYPE = 'vcs'
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HTTP_TYPE = 'http'
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class LazyFormencode(object):
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def __init__(self, formencode_obj, *args, **kwargs):
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self.formencode_obj = formencode_obj
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self.args = args
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self.kwargs = kwargs
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def __call__(self, *args, **kwargs):
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from inspect import isfunction
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formencode_obj = self.formencode_obj
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if isfunction(formencode_obj):
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# case we wrap validators into functions
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formencode_obj = self.formencode_obj(*args, **kwargs)
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return formencode_obj(*self.args, **self.kwargs)
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class RhodeCodeAuthPluginBase(object):
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# cache the authentication request for N amount of seconds. Some kind
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# of authentication methods are very heavy and it's very efficient to cache
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# the result of a call. If it's set to None (default) cache is off
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AUTH_CACHE_TTL = None
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AUTH_CACHE = {}
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auth_func_attrs = {
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"username": "unique username",
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"firstname": "first name",
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"lastname": "last name",
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"email": "email address",
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"groups": '["list", "of", "groups"]',
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"extern_name": "name in external source of record",
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"extern_type": "type of external source of record",
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"admin": 'True|False defines if user should be RhodeCode super admin',
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"active":
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'True|False defines active state of user internally for RhodeCode',
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"active_from_extern":
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"True|False\None, active state from the external auth, "
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"None means use definition from RhodeCode extern_type active value"
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}
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# set on authenticate() method and via set_auth_type func.
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auth_type = None
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# List of setting names to store encrypted. Plugins may override this list
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# to store settings encrypted.
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_settings_encrypted = []
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# Mapping of python to DB settings model types. Plugins may override or
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# extend this mapping.
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_settings_type_map = {
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colander.String: 'unicode',
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colander.Integer: 'int',
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colander.Boolean: 'bool',
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colander.List: 'list',
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}
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def __init__(self, plugin_id):
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self._plugin_id = plugin_id
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def __str__(self):
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return self.get_id()
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def _get_setting_full_name(self, name):
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"""
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Return the full setting name used for storing values in the database.
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"""
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# TODO: johbo: Using the name here is problematic. It would be good to
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# introduce either new models in the database to hold Plugin and
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# PluginSetting or to use the plugin id here.
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return 'auth_{}_{}'.format(self.name, name)
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def _get_setting_type(self, name):
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"""
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Return the type of a setting. This type is defined by the SettingsModel
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and determines how the setting is stored in DB. Optionally the suffix
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`.encrypted` is appended to instruct SettingsModel to store it
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encrypted.
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"""
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schema_node = self.get_settings_schema().get(name)
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db_type = self._settings_type_map.get(
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type(schema_node.typ), 'unicode')
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if name in self._settings_encrypted:
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db_type = '{}.encrypted'.format(db_type)
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return db_type
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def is_enabled(self):
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"""
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Returns true if this plugin is enabled. An enabled plugin can be
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configured in the admin interface but it is not consulted during
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authentication.
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"""
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auth_plugins = SettingsModel().get_auth_plugins()
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return self.get_id() in auth_plugins
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def is_active(self):
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"""
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Returns true if the plugin is activated. An activated plugin is
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consulted during authentication, assumed it is also enabled.
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"""
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return self.get_setting_by_name('enabled')
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def get_id(self):
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"""
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Returns the plugin id.
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"""
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return self._plugin_id
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def get_display_name(self):
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"""
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Returns a translation string for displaying purposes.
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"""
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raise NotImplementedError('Not implemented in base class')
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def get_settings_schema(self):
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"""
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Returns a colander schema, representing the plugin settings.
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"""
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return AuthnPluginSettingsSchemaBase()
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def get_setting_by_name(self, name, default=None):
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"""
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Returns a plugin setting by name.
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"""
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full_name = self._get_setting_full_name(name)
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db_setting = SettingsModel().get_setting_by_name(full_name)
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return db_setting.app_settings_value if db_setting else default
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def create_or_update_setting(self, name, value):
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"""
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Create or update a setting for this plugin in the persistent storage.
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"""
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full_name = self._get_setting_full_name(name)
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type_ = self._get_setting_type(name)
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db_setting = SettingsModel().create_or_update_setting(
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full_name, value, type_)
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return db_setting.app_settings_value
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def get_settings(self):
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"""
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Returns the plugin settings as dictionary.
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"""
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settings = {}
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for node in self.get_settings_schema():
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settings[node.name] = self.get_setting_by_name(node.name)
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return settings
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@property
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def validators(self):
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"""
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Exposes RhodeCode validators modules
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"""
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# this is a hack to overcome issues with pylons threadlocals and
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# translator object _() not beein registered properly.
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class LazyCaller(object):
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def __init__(self, name):
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self.validator_name = name
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def __call__(self, *args, **kwargs):
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from rhodecode.model import validators as v
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obj = getattr(v, self.validator_name)
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# log.debug('Initializing lazy formencode object: %s', obj)
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return LazyFormencode(obj, *args, **kwargs)
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class ProxyGet(object):
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def __getattribute__(self, name):
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return LazyCaller(name)
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return ProxyGet()
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@hybrid_property
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def name(self):
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"""
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Returns the name of this authentication plugin.
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:returns: string
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"""
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raise NotImplementedError("Not implemented in base class")
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@property
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def is_headers_auth(self):
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"""
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Returns True if this authentication plugin uses HTTP headers as
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authentication method.
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"""
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return False
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@hybrid_property
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def is_container_auth(self):
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"""
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Deprecated method that indicates if this authentication plugin uses
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HTTP headers as authentication method.
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"""
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warnings.warn(
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'Use is_headers_auth instead.', category=DeprecationWarning)
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return self.is_headers_auth
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@hybrid_property
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def allows_creating_users(self):
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"""
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Defines if Plugin allows users to be created on-the-fly when
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authentication is called. Controls how external plugins should behave
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in terms if they are allowed to create new users, or not. Base plugins
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should not be allowed to, but External ones should be !
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:return: bool
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"""
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return False
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def set_auth_type(self, auth_type):
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self.auth_type = auth_type
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def allows_authentication_from(
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self, user, allows_non_existing_user=True,
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allowed_auth_plugins=None, allowed_auth_sources=None):
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"""
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Checks if this authentication module should accept a request for
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the current user.
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:param user: user object fetched using plugin's get_user() method.
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:param allows_non_existing_user: if True, don't allow the
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user to be empty, meaning not existing in our database
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:param allowed_auth_plugins: if provided, users extern_type will be
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checked against a list of provided extern types, which are plugin
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auth_names in the end
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:param allowed_auth_sources: authentication type allowed,
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`http` or `vcs` default is both.
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defines if plugin will accept only http authentication vcs
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authentication(git/hg) or both
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:returns: boolean
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"""
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if not user and not allows_non_existing_user:
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log.debug('User is empty but plugin does not allow empty users,'
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'not allowed to authenticate')
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return False
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expected_auth_plugins = allowed_auth_plugins or [self.name]
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if user and (user.extern_type and
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user.extern_type not in expected_auth_plugins):
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log.debug(
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'User `%s` is bound to `%s` auth type. Plugin allows only '
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'%s, skipping', user, user.extern_type, expected_auth_plugins)
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return False
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# by default accept both
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expected_auth_from = allowed_auth_sources or [HTTP_TYPE, VCS_TYPE]
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if self.auth_type not in expected_auth_from:
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log.debug('Current auth source is %s but plugin only allows %s',
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self.auth_type, expected_auth_from)
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return False
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return True
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def get_user(self, username=None, **kwargs):
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"""
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Helper method for user fetching in plugins, by default it's using
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simple fetch by username, but this method can be custimized in plugins
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eg. headers auth plugin to fetch user by environ params
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:param username: username if given to fetch from database
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:param kwargs: extra arguments needed for user fetching.
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"""
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user = None
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log.debug(
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'Trying to fetch user `%s` from RhodeCode database', username)
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if username:
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user = User.get_by_username(username)
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if not user:
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log.debug('User not found, fallback to fetch user in '
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'case insensitive mode')
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user = User.get_by_username(username, case_insensitive=True)
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else:
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log.debug('provided username:`%s` is empty skipping...', username)
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if not user:
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log.debug('User `%s` not found in database', username)
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return user
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def user_activation_state(self):
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"""
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Defines user activation state when creating new users
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:returns: boolean
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"""
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raise NotImplementedError("Not implemented in base class")
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def auth(self, userobj, username, passwd, settings, **kwargs):
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"""
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Given a user object (which may be null), username, a plaintext
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password, and a settings object (containing all the keys needed as
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listed in settings()), authenticate this user's login attempt.
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Return None on failure. On success, return a dictionary of the form:
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see: RhodeCodeAuthPluginBase.auth_func_attrs
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This is later validated for correctness
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"""
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raise NotImplementedError("not implemented in base class")
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def _authenticate(self, userobj, username, passwd, settings, **kwargs):
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"""
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Wrapper to call self.auth() that validates call on it
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:param userobj: userobj
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:param username: username
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:param passwd: plaintext password
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:param settings: plugin settings
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"""
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auth = self.auth(userobj, username, passwd, settings, **kwargs)
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if auth:
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# check if hash should be migrated ?
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new_hash = auth.get('_hash_migrate')
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if new_hash:
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self._migrate_hash_to_bcrypt(username, passwd, new_hash)
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return self._validate_auth_return(auth)
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return auth
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def _migrate_hash_to_bcrypt(self, username, password, new_hash):
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new_hash_cypher = _RhodeCodeCryptoBCrypt()
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# extra checks, so make sure new hash is correct.
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password_encoded = safe_str(password)
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if new_hash and new_hash_cypher.hash_check(
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password_encoded, new_hash):
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cur_user = User.get_by_username(username)
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cur_user.password = new_hash
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Session().add(cur_user)
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Session().flush()
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log.info('Migrated user %s hash to bcrypt', cur_user)
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def _validate_auth_return(self, ret):
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if not isinstance(ret, dict):
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raise Exception('returned value from auth must be a dict')
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for k in self.auth_func_attrs:
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if k not in ret:
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raise Exception('Missing %s attribute from returned data' % k)
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return ret
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class RhodeCodeExternalAuthPlugin(RhodeCodeAuthPluginBase):
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@hybrid_property
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def allows_creating_users(self):
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return True
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def use_fake_password(self):
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"""
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Return a boolean that indicates whether or not we should set the user's
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password to a random value when it is authenticated by this plugin.
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If your plugin provides authentication, then you will generally
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want this.
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:returns: boolean
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"""
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raise NotImplementedError("Not implemented in base class")
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def _authenticate(self, userobj, username, passwd, settings, **kwargs):
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# at this point _authenticate calls plugin's `auth()` function
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auth = super(RhodeCodeExternalAuthPlugin, self)._authenticate(
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userobj, username, passwd, settings, **kwargs)
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if auth:
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# maybe plugin will clean the username ?
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# we should use the return value
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username = auth['username']
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# if external source tells us that user is not active, we should
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# skip rest of the process. This can prevent from creating users in
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# RhodeCode when using external authentication, but if it's
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# inactive user we shouldn't create that user anyway
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if auth['active_from_extern'] is False:
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log.warning(
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"User %s authenticated against %s, but is inactive",
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username, self.__module__)
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return None
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cur_user = User.get_by_username(username, case_insensitive=True)
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is_user_existing = cur_user is not None
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if is_user_existing:
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log.debug('Syncing user `%s` from '
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'`%s` plugin', username, self.name)
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else:
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log.debug('Creating non existing user `%s` from '
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'`%s` plugin', username, self.name)
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if self.allows_creating_users:
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log.debug('Plugin `%s` allows to '
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'create new users', self.name)
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else:
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log.debug('Plugin `%s` does not allow to '
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'create new users', self.name)
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user_parameters = {
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'username': username,
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'email': auth["email"],
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'firstname': auth["firstname"],
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|
|
'lastname': auth["lastname"],
|
|
|
'active': auth["active"],
|
|
|
'admin': auth["admin"],
|
|
|
'extern_name': auth["extern_name"],
|
|
|
'extern_type': self.name,
|
|
|
'plugin': self,
|
|
|
'allow_to_create_user': self.allows_creating_users,
|
|
|
}
|
|
|
|
|
|
if not is_user_existing:
|
|
|
if self.use_fake_password():
|
|
|
# Randomize the PW because we don't need it, but don't want
|
|
|
# them blank either
|
|
|
passwd = PasswordGenerator().gen_password(length=16)
|
|
|
user_parameters['password'] = passwd
|
|
|
else:
|
|
|
# Since the password is required by create_or_update method of
|
|
|
# UserModel, we need to set it explicitly.
|
|
|
# The create_or_update method is smart and recognises the
|
|
|
# password hashes as well.
|
|
|
user_parameters['password'] = cur_user.password
|
|
|
|
|
|
# we either create or update users, we also pass the flag
|
|
|
# that controls if this method can actually do that.
|
|
|
# raises NotAllowedToCreateUserError if it cannot, and we try to.
|
|
|
user = UserModel().create_or_update(**user_parameters)
|
|
|
Session().flush()
|
|
|
# enforce user is just in given groups, all of them has to be ones
|
|
|
# created from plugins. We store this info in _group_data JSON
|
|
|
# field
|
|
|
try:
|
|
|
groups = auth['groups'] or []
|
|
|
UserGroupModel().enforce_groups(user, groups, self.name)
|
|
|
except Exception:
|
|
|
# for any reason group syncing fails, we should
|
|
|
# proceed with login
|
|
|
log.error(traceback.format_exc())
|
|
|
Session().commit()
|
|
|
return auth
|
|
|
|
|
|
|
|
|
def loadplugin(plugin_id):
|
|
|
"""
|
|
|
Loads and returns an instantiated authentication plugin.
|
|
|
Returns the RhodeCodeAuthPluginBase subclass on success,
|
|
|
or None on failure.
|
|
|
"""
|
|
|
# TODO: Disusing pyramids thread locals to retrieve the registry.
|
|
|
authn_registry = get_authn_registry()
|
|
|
plugin = authn_registry.get_plugin(plugin_id)
|
|
|
if plugin is None:
|
|
|
log.error('Authentication plugin not found: "%s"', plugin_id)
|
|
|
return plugin
|
|
|
|
|
|
|
|
|
def get_authn_registry(registry=None):
|
|
|
registry = registry or get_current_registry()
|
|
|
authn_registry = registry.getUtility(IAuthnPluginRegistry)
|
|
|
return authn_registry
|
|
|
|
|
|
|
|
|
def get_auth_cache_manager(custom_ttl=None):
|
|
|
return caches.get_cache_manager(
|
|
|
'auth_plugins', 'rhodecode.authentication', custom_ttl)
|
|
|
|
|
|
|
|
|
def authenticate(username, password, environ=None, auth_type=None,
|
|
|
skip_missing=False, registry=None):
|
|
|
"""
|
|
|
Authentication function used for access control,
|
|
|
It tries to authenticate based on enabled authentication modules.
|
|
|
|
|
|
:param username: username can be empty for headers auth
|
|
|
:param password: password can be empty for headers auth
|
|
|
:param environ: environ headers passed for headers auth
|
|
|
:param auth_type: type of authentication, either `HTTP_TYPE` or `VCS_TYPE`
|
|
|
:param skip_missing: ignores plugins that are in db but not in environment
|
|
|
:returns: None if auth failed, plugin_user dict if auth is correct
|
|
|
"""
|
|
|
if not auth_type or auth_type not in [HTTP_TYPE, VCS_TYPE]:
|
|
|
raise ValueError('auth type must be on of http, vcs got "%s" instead'
|
|
|
% auth_type)
|
|
|
headers_only = environ and not (username and password)
|
|
|
|
|
|
authn_registry = get_authn_registry(registry)
|
|
|
for plugin in authn_registry.get_plugins_for_authentication():
|
|
|
plugin.set_auth_type(auth_type)
|
|
|
user = plugin.get_user(username)
|
|
|
display_user = user.username if user else username
|
|
|
|
|
|
if headers_only and not plugin.is_headers_auth:
|
|
|
log.debug('Auth type is for headers only and plugin `%s` is not '
|
|
|
'headers plugin, skipping...', plugin.get_id())
|
|
|
continue
|
|
|
|
|
|
# load plugin settings from RhodeCode database
|
|
|
plugin_settings = plugin.get_settings()
|
|
|
log.debug('Plugin settings:%s', plugin_settings)
|
|
|
|
|
|
log.debug('Trying authentication using ** %s **', plugin.get_id())
|
|
|
# use plugin's method of user extraction.
|
|
|
user = plugin.get_user(username, environ=environ,
|
|
|
settings=plugin_settings)
|
|
|
display_user = user.username if user else username
|
|
|
log.debug(
|
|
|
'Plugin %s extracted user is `%s`', plugin.get_id(), display_user)
|
|
|
|
|
|
if not plugin.allows_authentication_from(user):
|
|
|
log.debug('Plugin %s does not accept user `%s` for authentication',
|
|
|
plugin.get_id(), display_user)
|
|
|
continue
|
|
|
else:
|
|
|
log.debug('Plugin %s accepted user `%s` for authentication',
|
|
|
plugin.get_id(), display_user)
|
|
|
|
|
|
log.info('Authenticating user `%s` using %s plugin',
|
|
|
display_user, plugin.get_id())
|
|
|
|
|
|
_cache_ttl = 0
|
|
|
|
|
|
if isinstance(plugin.AUTH_CACHE_TTL, (int, long)):
|
|
|
# plugin cache set inside is more important than the settings value
|
|
|
_cache_ttl = plugin.AUTH_CACHE_TTL
|
|
|
elif plugin_settings.get('cache_ttl'):
|
|
|
_cache_ttl = safe_int(plugin_settings.get('cache_ttl'), 0)
|
|
|
|
|
|
plugin_cache_active = bool(_cache_ttl and _cache_ttl > 0)
|
|
|
|
|
|
# get instance of cache manager configured for a namespace
|
|
|
cache_manager = get_auth_cache_manager(custom_ttl=_cache_ttl)
|
|
|
|
|
|
log.debug('AUTH_CACHE_TTL for plugin `%s` active: %s (TTL: %s)',
|
|
|
plugin.get_id(), plugin_cache_active, _cache_ttl)
|
|
|
|
|
|
# for environ based password can be empty, but then the validation is
|
|
|
# on the server that fills in the env data needed for authentication
|
|
|
_password_hash = md5_safe(plugin.name + username + (password or ''))
|
|
|
|
|
|
# _authenticate is a wrapper for .auth() method of plugin.
|
|
|
# it checks if .auth() sends proper data.
|
|
|
# For RhodeCodeExternalAuthPlugin it also maps users to
|
|
|
# Database and maps the attributes returned from .auth()
|
|
|
# to RhodeCode database. If this function returns data
|
|
|
# then auth is correct.
|
|
|
start = time.time()
|
|
|
log.debug('Running plugin `%s` _authenticate method', plugin.get_id())
|
|
|
|
|
|
def auth_func():
|
|
|
"""
|
|
|
This function is used internally in Cache of Beaker to calculate
|
|
|
Results
|
|
|
"""
|
|
|
return plugin._authenticate(
|
|
|
user, username, password, plugin_settings,
|
|
|
environ=environ or {})
|
|
|
|
|
|
if plugin_cache_active:
|
|
|
plugin_user = cache_manager.get(
|
|
|
_password_hash, createfunc=auth_func)
|
|
|
else:
|
|
|
plugin_user = auth_func()
|
|
|
|
|
|
auth_time = time.time() - start
|
|
|
log.debug('Authentication for plugin `%s` completed in %.3fs, '
|
|
|
'expiration time of fetched cache %.1fs.',
|
|
|
plugin.get_id(), auth_time, _cache_ttl)
|
|
|
|
|
|
log.debug('PLUGIN USER DATA: %s', plugin_user)
|
|
|
|
|
|
if plugin_user:
|
|
|
log.debug('Plugin returned proper authentication data')
|
|
|
return plugin_user
|
|
|
# we failed to Auth because .auth() method didn't return proper user
|
|
|
log.debug("User `%s` failed to authenticate against %s",
|
|
|
display_user, plugin.get_id())
|
|
|
return None
|
|
|
|
