fixes #136 leftover patch

rhodecode/lib/auth.py

@@ -1,614 +1,614 b''
 # -*- 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
 
 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, RepoToPerm, Repository, \
     User, UserToPerm
 
 
 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__ == 'Windows':
+        if __platform__ in PLATFORM_WIN:
             return sha256(password).hexdigest() == hashed
-        elif __platform__ in ('Linux', 'Darwin'):
+        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 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 user.is_ldap is False:
         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 user_obj.is_ldap is False:
             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 IN 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')),
                   'ldap_version':3,
                   }
             log.debug('Checking for ldap authentication')
             try:
                 aldap = AuthLdap(**kwargs)
                 res = aldap.authenticate_ldap(username, password)
                 log.debug('Got ldap response %s', res)
 
                 if user_model.create_ldap(username, password):
                     log.info('created new ldap user')
 
                 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 "<AuthUser('id:%s:%s')>" % (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 wannt 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:
     """
     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 set_base_path(config):
     config['base_path'] = config['pylons.app_globals'].base_path
 
 
 def fill_perms(user):
     """
     Fills user permission attribute with permissions taken from database
     :param user:
     """
 
     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 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
     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