# -*- coding: utf-8 -*- """ rhodecode.lib.auth ~~~~~~~~~~~~~~~~~~ authentication and permission libraries :created_on: Apr 4, 2010 :copyright: (c) 2010 by marcink. :license: LICENSE_NAME, see LICENSE_FILE for more details. """ # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; version 2 # of the License or (at your opinion) any later version of the license. # # 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 General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, # MA 02110-1301, USA. import bcrypt import random import logging import traceback from decorator import decorator from pylons import config, session, url, request from pylons.controllers.util import abort, redirect from rhodecode.lib.exceptions import LdapPasswordError, LdapUsernameError from rhodecode.lib.utils import get_repo_slug from rhodecode.lib.auth_ldap import AuthLdap from rhodecode.model import meta from rhodecode.model.user import UserModel from rhodecode.model.db import User, RepoToPerm, Repository, Permission, \ UserToPerm, UsersGroupToPerm, UsersGroupMember log = logging.getLogger(__name__) PERM_WEIGHTS = {'repository.none':0, 'repository.read':1, 'repository.write':3, 'repository.admin':3} class PasswordGenerator(object): """This is a simple class for generating password from different sets of characters usage: passwd_gen = PasswordGenerator() #print 8-letter password containing only big and small letters of alphabet print passwd_gen.gen_password(8, passwd_gen.ALPHABETS_BIG_SMALL) """ ALPHABETS_NUM = r'''1234567890'''#[0] ALPHABETS_SMALL = r'''qwertyuiopasdfghjklzxcvbnm'''#[1] ALPHABETS_BIG = r'''QWERTYUIOPASDFGHJKLZXCVBNM'''#[2] ALPHABETS_SPECIAL = r'''`-=[]\;',./~!@#$%^&*()_+{}|:"<>?''' #[3] ALPHABETS_FULL = ALPHABETS_BIG + ALPHABETS_SMALL + ALPHABETS_NUM + ALPHABETS_SPECIAL#[4] ALPHABETS_ALPHANUM = ALPHABETS_BIG + ALPHABETS_SMALL + ALPHABETS_NUM#[5] ALPHABETS_BIG_SMALL = ALPHABETS_BIG + ALPHABETS_SMALL ALPHABETS_ALPHANUM_BIG = ALPHABETS_BIG + ALPHABETS_NUM#[6] ALPHABETS_ALPHANUM_SMALL = ALPHABETS_SMALL + ALPHABETS_NUM#[7] def __init__(self, passwd=''): self.passwd = passwd def gen_password(self, len, type): self.passwd = ''.join([random.choice(type) for _ in xrange(len)]) return self.passwd def get_crypt_password(password): """Cryptographic function used for password hashing based on pybcrypt :param password: password to hash """ return bcrypt.hashpw(password, bcrypt.gensalt(10)) def check_password(password, hashed): return bcrypt.hashpw(password, hashed) == hashed def authfunc(environ, username, password): """Dummy authentication function used in Mercurial/Git/ and access control, :param environ: needed only for using in Basic auth """ return authenticate(username, password) def authenticate(username, password): """Authentication function used for access control, firstly checks for db authentication then if ldap is enabled for ldap authentication, also creates ldap user if not in database :param username: username :param password: password """ user_model = UserModel() user = user_model.get_by_username(username, cache=False) log.debug('Authenticating user using RhodeCode account') if user is not None and not user.ldap_dn: if user.active: if user.username == 'default' and user.active: log.info('user %s authenticated correctly as anonymous user', username) return True elif user.username == username and check_password(password, user.password): log.info('user %s authenticated correctly', username) return True else: log.warning('user %s is disabled', username) else: log.debug('Regular authentication failed') user_obj = user_model.get_by_username(username, cache=False, case_insensitive=True) if user_obj is not None and not user_obj.ldap_dn: log.debug('this user already exists as non ldap') return False from rhodecode.model.settings import SettingsModel ldap_settings = SettingsModel().get_ldap_settings() #====================================================================== # FALLBACK TO LDAP AUTH IF ENABLE #====================================================================== if ldap_settings.get('ldap_active', False): log.debug("Authenticating user using ldap") kwargs = { 'server':ldap_settings.get('ldap_host', ''), 'base_dn':ldap_settings.get('ldap_base_dn', ''), 'port':ldap_settings.get('ldap_port'), 'bind_dn':ldap_settings.get('ldap_dn_user'), 'bind_pass':ldap_settings.get('ldap_dn_pass'), 'use_ldaps':ldap_settings.get('ldap_ldaps'), 'tls_reqcert':ldap_settings.get('ldap_tls_reqcert'), 'ldap_filter':ldap_settings.get('ldap_filter'), 'search_scope':ldap_settings.get('ldap_search_scope'), 'attr_login':ldap_settings.get('ldap_attr_login'), 'ldap_version':3, } log.debug('Checking for ldap authentication') try: aldap = AuthLdap(**kwargs) (user_dn, ldap_attrs) = aldap.authenticate_ldap(username, password) log.debug('Got ldap DN response %s', user_dn) user_attrs = { 'name' : ldap_attrs[ldap_settings.get('ldap_attr_firstname')][0], 'lastname' : ldap_attrs[ldap_settings.get('ldap_attr_lastname')][0], 'email' : ldap_attrs[ldap_settings.get('ldap_attr_email')][0], } if user_model.create_ldap(username, password, user_dn, user_attrs): log.info('created new ldap user %s', username) return True except (LdapUsernameError, LdapPasswordError,): pass except (Exception,): log.error(traceback.format_exc()) pass return False class AuthUser(object): """A simple object that handles a mercurial username for authentication """ def __init__(self): self.username = 'None' self.name = '' self.lastname = '' self.email = '' self.user_id = None self.is_authenticated = False self.is_admin = False self.permissions = {} def __repr__(self): return "" % (self.user_id, self.username) def set_available_permissions(config): """This function will propagate pylons globals with all available defined permission given in db. We don't want to check each time from db for new permissions since adding a new permission also requires application restart ie. to decorate new views with the newly created permission :param config: current pylons config instance """ log.info('getting information about all available permissions') try: sa = meta.Session() all_perms = sa.query(Permission).all() except: pass finally: meta.Session.remove() config['available_permissions'] = [x.permission_name for x in all_perms] def fill_perms(user): """Fills user permission attribute with permissions taken from database works for permissions given for repositories, and for permissions that as part of beeing group member :param user: user instance to fill his perms """ sa = meta.Session() user.permissions['repositories'] = {} user.permissions['global'] = set() #=========================================================================== # fetch default permissions #=========================================================================== default_user = UserModel().get_by_username('default', cache=True) default_perms = sa.query(RepoToPerm, Repository, Permission)\ .join((Repository, RepoToPerm.repository_id == Repository.repo_id))\ .join((Permission, RepoToPerm.permission_id == Permission.permission_id))\ .filter(RepoToPerm.user == default_user).all() if user.is_admin: #======================================================================= # #admin have all default rights set to admin #======================================================================= user.permissions['global'].add('hg.admin') for perm in default_perms: p = 'repository.admin' user.permissions['repositories'][perm.RepoToPerm.repository.repo_name] = p else: #======================================================================= # set default permissions #======================================================================= #default global default_global_perms = sa.query(UserToPerm)\ .filter(UserToPerm.user == sa.query(User)\ .filter(User.username == 'default').one()) for perm in default_global_perms: user.permissions['global'].add(perm.permission.permission_name) #default for repositories for perm in default_perms: if perm.Repository.private and not perm.Repository.user_id == user.user_id: #disable defaults for private repos, p = 'repository.none' elif perm.Repository.user_id == user.user_id: #set admin if owner p = 'repository.admin' else: p = perm.Permission.permission_name user.permissions['repositories'][perm.RepoToPerm.repository.repo_name] = p #======================================================================= # overwrite default with user permissions if any #======================================================================= user_perms = sa.query(RepoToPerm, Permission, Repository)\ .join((Repository, RepoToPerm.repository_id == Repository.repo_id))\ .join((Permission, RepoToPerm.permission_id == Permission.permission_id))\ .filter(RepoToPerm.user_id == user.user_id).all() for perm in user_perms: if perm.Repository.user_id == user.user_id:#set admin if owner p = 'repository.admin' else: p = perm.Permission.permission_name user.permissions['repositories'][perm.RepoToPerm.repository.repo_name] = p #======================================================================= # check if user is part of groups for this repository and fill in # (or replace with higher) permissions #======================================================================= user_perms_from_users_groups = sa.query(UsersGroupToPerm, Permission, Repository,)\ .join((Repository, UsersGroupToPerm.repository_id == Repository.repo_id))\ .join((Permission, UsersGroupToPerm.permission_id == Permission.permission_id))\ .join((UsersGroupMember, UsersGroupToPerm.users_group_id == UsersGroupMember.users_group_id))\ .filter(UsersGroupMember.user_id == user.user_id).all() for perm in user_perms_from_users_groups: p = perm.Permission.permission_name cur_perm = user.permissions['repositories'][perm.UsersGroupToPerm.repository.repo_name] #overwrite permission only if it's greater than permission given from other sources if PERM_WEIGHTS[p] > PERM_WEIGHTS[cur_perm]: user.permissions['repositories'][perm.UsersGroupToPerm.repository.repo_name] = p meta.Session.remove() return user def get_user(session): """Gets user from session, and wraps permissions into user :param session: """ user = session.get('rhodecode_user', AuthUser()) #if the user is not logged in we check for anonymous access #if user is logged and it's a default user check if we still have anonymous #access enabled if user.user_id is None or user.username == 'default': anonymous_user = UserModel().get_by_username('default', cache=True) if anonymous_user.active is True: #then we set this user is logged in user.is_authenticated = True user.user_id = anonymous_user.user_id else: user.is_authenticated = False if user.is_authenticated: user = UserModel().fill_data(user) user = fill_perms(user) session['rhodecode_user'] = user session.save() return user #=============================================================================== # CHECK DECORATORS #=============================================================================== class LoginRequired(object): """Must be logged in to execute this function else redirect to login page""" def __call__(self, func): return decorator(self.__wrapper, func) def __wrapper(self, func, *fargs, **fkwargs): user = session.get('rhodecode_user', AuthUser()) log.debug('Checking login required for user:%s', user.username) if user.is_authenticated: log.debug('user %s is authenticated', user.username) return func(*fargs, **fkwargs) else: log.warn('user %s not authenticated', user.username) p = '' if request.environ.get('SCRIPT_NAME') != '/': p += request.environ.get('SCRIPT_NAME') p += request.environ.get('PATH_INFO') if request.environ.get('QUERY_STRING'): p += '?' + request.environ.get('QUERY_STRING') log.debug('redirecting to login page with %s', p) return redirect(url('login_home', came_from=p)) class NotAnonymous(object): """Must be logged in to execute this function else redirect to login page""" def __call__(self, func): return decorator(self.__wrapper, func) def __wrapper(self, func, *fargs, **fkwargs): user = session.get('rhodecode_user', AuthUser()) log.debug('Checking if user is not anonymous') anonymous = user.username == 'default' if anonymous: p = '' if request.environ.get('SCRIPT_NAME') != '/': p += request.environ.get('SCRIPT_NAME') p += request.environ.get('PATH_INFO') if request.environ.get('QUERY_STRING'): p += '?' + request.environ.get('QUERY_STRING') return redirect(url('login_home', came_from=p)) else: return func(*fargs, **fkwargs) class PermsDecorator(object): """Base class for decorators""" def __init__(self, *required_perms): available_perms = config['available_permissions'] for perm in required_perms: if perm not in available_perms: raise Exception("'%s' permission is not defined" % perm) self.required_perms = set(required_perms) self.user_perms = None def __call__(self, func): return decorator(self.__wrapper, func) def __wrapper(self, func, *fargs, **fkwargs): # _wrapper.__name__ = func.__name__ # _wrapper.__dict__.update(func.__dict__) # _wrapper.__doc__ = func.__doc__ self.user = session.get('rhodecode_user', AuthUser()) self.user_perms = self.user.permissions log.debug('checking %s permissions %s for %s %s', self.__class__.__name__, self.required_perms, func.__name__, self.user) if self.check_permissions(): log.debug('Permission granted for %s %s', func.__name__, self.user) return func(*fargs, **fkwargs) else: log.warning('Permission denied for %s %s', func.__name__, self.user) #redirect with forbidden ret code return abort(403) def check_permissions(self): """Dummy function for overriding""" raise Exception('You have to write this function in child class') class HasPermissionAllDecorator(PermsDecorator): """Checks for access permission for all given predicates. All of them have to be meet in order to fulfill the request """ def check_permissions(self): if self.required_perms.issubset(self.user_perms.get('global')): return True return False class HasPermissionAnyDecorator(PermsDecorator): """Checks for access permission for any of given predicates. In order to fulfill the request any of predicates must be meet """ def check_permissions(self): if self.required_perms.intersection(self.user_perms.get('global')): return True return False class HasRepoPermissionAllDecorator(PermsDecorator): """Checks for access permission for all given predicates for specific repository. All of them have to be meet in order to fulfill the request """ def check_permissions(self): repo_name = get_repo_slug(request) try: user_perms = set([self.user_perms['repositories'][repo_name]]) except KeyError: return False if self.required_perms.issubset(user_perms): return True return False class HasRepoPermissionAnyDecorator(PermsDecorator): """Checks for access permission for any of given predicates for specific repository. In order to fulfill the request any of predicates must be meet """ def check_permissions(self): repo_name = get_repo_slug(request) try: user_perms = set([self.user_perms['repositories'][repo_name]]) except KeyError: return False if self.required_perms.intersection(user_perms): return True return False #=============================================================================== # CHECK FUNCTIONS #=============================================================================== class PermsFunction(object): """Base function for other check functions""" def __init__(self, *perms): available_perms = config['available_permissions'] for perm in perms: if perm not in available_perms: raise Exception("'%s' permission in not defined" % perm) self.required_perms = set(perms) self.user_perms = None self.granted_for = '' self.repo_name = None def __call__(self, check_Location=''): user = session.get('rhodecode_user', False) if not user: return False self.user_perms = user.permissions self.granted_for = user.username log.debug('checking %s %s %s', self.__class__.__name__, self.required_perms, user) if self.check_permissions(): log.debug('Permission granted for %s @ %s %s', self.granted_for, check_Location, user) return True else: log.warning('Permission denied for %s @ %s %s', self.granted_for, check_Location, user) return False def check_permissions(self): """Dummy function for overriding""" raise Exception('You have to write this function in child class') class HasPermissionAll(PermsFunction): def check_permissions(self): if self.required_perms.issubset(self.user_perms.get('global')): return True return False class HasPermissionAny(PermsFunction): def check_permissions(self): if self.required_perms.intersection(self.user_perms.get('global')): return True return False class HasRepoPermissionAll(PermsFunction): def __call__(self, repo_name=None, check_Location=''): self.repo_name = repo_name return super(HasRepoPermissionAll, self).__call__(check_Location) def check_permissions(self): if not self.repo_name: self.repo_name = get_repo_slug(request) try: self.user_perms = set([self.user_perms['repositories']\ [self.repo_name]]) except KeyError: return False self.granted_for = self.repo_name if self.required_perms.issubset(self.user_perms): return True return False class HasRepoPermissionAny(PermsFunction): def __call__(self, repo_name=None, check_Location=''): self.repo_name = repo_name return super(HasRepoPermissionAny, self).__call__(check_Location) def check_permissions(self): if not self.repo_name: self.repo_name = get_repo_slug(request) try: self.user_perms = set([self.user_perms['repositories']\ [self.repo_name]]) except KeyError: return False self.granted_for = self.repo_name if self.required_perms.intersection(self.user_perms): return True return False #=============================================================================== # SPECIAL VERSION TO HANDLE MIDDLEWARE AUTH #=============================================================================== class HasPermissionAnyMiddleware(object): def __init__(self, *perms): self.required_perms = set(perms) def __call__(self, user, repo_name): usr = AuthUser() usr.user_id = user.user_id usr.username = user.username usr.is_admin = user.admin try: self.user_perms = set([fill_perms(usr)\ .permissions['repositories'][repo_name]]) except: self.user_perms = set() self.granted_for = '' self.username = user.username self.repo_name = repo_name return self.check_permissions() def check_permissions(self): log.debug('checking mercurial protocol ' 'permissions for user:%s repository:%s', self.username, self.repo_name) if self.required_perms.intersection(self.user_perms): log.debug('permission granted') return True log.debug('permission denied') return False