# -*- 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 random import logging import traceback import hashlib from tempfile import _RandomNameSequence from decorator import decorator from pylons import config, session, url, request from pylons.controllers.util import abort, redirect from pylons.i18n.translation import _ from rhodecode import __platform__, PLATFORM_WIN, PLATFORM_OTHERS if __platform__ in PLATFORM_WIN: from hashlib import sha256 if __platform__ in PLATFORM_OTHERS: import bcrypt from rhodecode.lib import str2bool 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 Permission log = logging.getLogger(__name__) 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 class RhodeCodeCrypto(object): @classmethod def hash_string(cls, str_): """ Cryptographic function used for password hashing based on pybcrypt or pycrypto in windows :param password: password to hash """ if __platform__ in PLATFORM_WIN: return sha256(str_).hexdigest() elif __platform__ in PLATFORM_OTHERS: return bcrypt.hashpw(str_, bcrypt.gensalt(10)) else: raise Exception('Unknown or unsupported platform %s' % __platform__) @classmethod def hash_check(cls, password, hashed): """ Checks matching password with it's hashed value, runs different implementation based on platform it runs on :param password: password :param hashed: password in hashed form """ if __platform__ in PLATFORM_WIN: return sha256(password).hexdigest() == hashed elif __platform__ in PLATFORM_OTHERS: return bcrypt.hashpw(password, hashed) == hashed else: raise Exception('Unknown or unsupported platform %s' % __platform__) def get_crypt_password(password): return RhodeCodeCrypto.hash_string(password) def check_password(password, hashed): return RhodeCodeCrypto.hash_check(password, hashed) def generate_api_key(username, salt=None): if salt is None: salt = _RandomNameSequence().next() return hashlib.sha1(username + salt).hexdigest() 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 str2bool(ldap_settings.get('ldap_active')): 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':str2bool(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 all attributes of user in RhodeCode It does lookup based on API key,given user, or user present in session Then it fills all required information for such user. It also checks if anonymous access is enabled and if so, it returns default user as logged in """ def __init__(self, user_id=None, api_key=None): self.user_id = user_id self.api_key = None self.username = 'None' self.name = '' self.lastname = '' self.email = '' self.is_authenticated = False self.admin = False self.permissions = {} self._api_key = api_key self.propagate_data() def propagate_data(self): user_model = UserModel() self.anonymous_user = user_model.get_by_username('default', cache=True) if self._api_key and self._api_key != self.anonymous_user.api_key: #try go get user by api key log.debug('Auth User lookup by API KEY %s', self._api_key) user_model.fill_data(self, api_key=self._api_key) else: log.debug('Auth User lookup by USER ID %s', self.user_id) if self.user_id is not None and self.user_id != self.anonymous_user.user_id: user_model.fill_data(self, user_id=self.user_id) else: if self.anonymous_user.active is True: user_model.fill_data(self, user_id=self.anonymous_user.user_id) #then we set this user is logged in self.is_authenticated = True else: self.is_authenticated = False log.debug('Auth User is now %s', self) user_model.fill_perms(self) @property def is_admin(self): return self.admin def __repr__(self): return "" % (self.user_id, self.username, self.is_authenticated) def set_authenticated(self, authenticated=True): if self.user_id != self.anonymous_user.user_id: self.is_authenticated = authenticated 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] #=============================================================================== # CHECK DECORATORS #=============================================================================== class LoginRequired(object): """ Must be logged in to execute this function else redirect to login page :param api_access: if enabled this checks only for valid auth token and grants access based on valid token """ def __init__(self, api_access=False): self.api_access = api_access def __call__(self, func): return decorator(self.__wrapper, func) def __wrapper(self, func, *fargs, **fkwargs): cls = fargs[0] user = cls.rhodecode_user api_access_ok = False if self.api_access: log.debug('Checking API KEY access for %s', cls) if user.api_key == request.GET.get('api_key'): api_access_ok = True else: log.debug("API KEY token not valid") log.debug('Checking if %s is authenticated @ %s', user.username, cls) if user.is_authenticated or api_access_ok: 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): cls = fargs[0] self.user = cls.rhodecode_user log.debug('Checking if user is not anonymous @%s', cls) anonymous = self.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') import rhodecode.lib.helpers as h h.flash(_('You need to be a registered user to perform this action'), category='warning') return redirect(url('login_home', came_from=p)) else: return func(*fargs, **fkwargs) class PermsDecorator(object): """Base class for controller 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): cls = fargs[0] self.user = cls.rhodecode_user self.user_perms = self.user.permissions log.debug('checking %s permissions %s for %s %s', self.__class__.__name__, self.required_perms, cls, self.user) if self.check_permissions(): log.debug('Permission granted for %s %s', cls, self.user) return func(*fargs, **fkwargs) else: log.warning('Permission denied for %s %s', cls, 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 log.debug('checking %s %s %s', self.__class__.__name__, self.required_perms, user) if self.check_permissions(): log.debug('Permission granted %s @ %s', self.granted_for, check_Location or 'unspecified location') return True else: log.warning('Permission denied for %s @ %s', self.granted_for, check_Location or 'unspecified location') 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(user.user_id) try: self.user_perms = set([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 %s for user:%s repository:%s', self.user_perms, 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