fixes issue #78, ldap makes user validation caseInsensitive

and fixed validators to check for case insensitive values.

rhodecode/lib/auth.py

@@ -1,526 +1,534
 #!/usr/bin/env python
 # encoding: utf-8
 # authentication and permission libraries
 # Copyright (C) 2009-2010 Marcin Kuzminski <[e-mail]>
 #
 # 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.
 """
 Created on April 4, 2010
 
 @author: marcink
 """
 from pylons import config, session, url, request
 from pylons.controllers.util import abort, redirect
 from rhodecode.lib.exceptions import *
 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.caching_query import FromCache
 from rhodecode.model.db import User, RepoToPerm, Repository, Permission, \
     UserToPerm
 import bcrypt
 from decorator import decorator
 import logging
 import random
 import traceback
 
 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
 
 
 def get_crypt_password(password):
     """Cryptographic function used for password hashing based on sha1
     :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):
     """
     Authentication function used in Mercurial/Git/ and access control,
     firstly checks for db authentication then if ldap is enabled for ldap
     authentication, also creates ldap user if not in database
     
     :param environ: needed only for using in Basic auth, can be None
     :param username: username
     :param password: password
     """
     user_model = UserModel()
     user = user_model.get_by_username(username, cache=False)
 
     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', username)
                 return True
 
             elif user.username == username and check_password(password, user.password):
                 log.info('user %s authenticated correctly', username)
                 return True
         else:
             log.error('user %s is disabled', username)
 
 
     else:
+
+        #since ldap is searching in case insensitive check if this user is still
+        #not in our system
+        username = username.lower()
+        if user_model.get_by_username(username, cache=False) is not None:
+            return False 
+        
         from rhodecode.model.settings import SettingsModel
         ldap_settings = SettingsModel().get_ldap_settings()
 
         #======================================================================
         # FALLBACK TO LDAP AUTH IN ENABLE                
         #======================================================================
         if ldap_settings.get('ldap_active', False):
+            
             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'),
                   'ldap_version':3,
                   }
             log.debug('Checking for ldap authentication')
             try:
                 aldap = AuthLdap(**kwargs)
                 res = aldap.authenticate_ldap(username, password)
 
                 authenticated = res[1]['uid'][0] == username
 
                 if authenticated and user_model.create_ldap(username, password):
                     log.info('created new ldap user')
 
                 return authenticated
             except (LdapUsernameError, LdapPasswordError):
                 return False
             except:
                 log.error(traceback.format_exc())
                 return False
     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())
+            .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 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

rhodecode/model/forms.py

@@ -1,438 +1,441
 """ this is forms validation classes
 http://formencode.org/module-formencode.validators.html
 for list off all availible validators
 
 we can create our own validators
 
 The table below outlines the options which can be used in a schema in addition to the validators themselves
 pre_validators          []     These validators will be applied before the schema
 chained_validators      []     These validators will be applied after the schema
 allow_extra_fields      False     If True, then it is not an error when keys that aren't associated with a validator are present
 filter_extra_fields     False     If True, then keys that aren't associated with a validator are removed
 if_key_missing          NoDefault If this is given, then any keys that aren't available but are expected will be replaced with this value (and then validated). This does not override a present .if_missing attribute on validators. NoDefault is a special FormEncode class to mean that no default values has been specified and therefore missing keys shouldn't take a default value.
 ignore_key_missing      False     If True, then missing keys will be missing in the result, if the validator doesn't have .if_missing on it already    
   
   
 <name> = formencode.validators.<name of validator>
 <name> must equal form name
 list=[1,2,3,4,5]
 for SELECT use formencode.All(OneOf(list), Int())
     
 """
 from formencode import All
 from formencode.validators import UnicodeString, OneOf, Int, Number, Regex, \
     Email, Bool, StringBoolean
 from pylons import session
 from pylons.i18n.translation import _
 from rhodecode.lib.auth import authfunc, get_crypt_password
 from rhodecode.lib.exceptions import LdapImportError
 from rhodecode.model import meta
 from rhodecode.model.user import UserModel
 from rhodecode.model.repo import RepoModel
 from rhodecode.model.db import User
 from webhelpers.pylonslib.secure_form import authentication_token
 from rhodecode import BACKENDS
 import formencode
 import logging
 import os
 import rhodecode.lib.helpers as h
 
 log = logging.getLogger(__name__)
 
 #this is needed to translate the messages using _() in validators
 class State_obj(object):
     _ = staticmethod(_)
 
 #===============================================================================
 # VALIDATORS
 #===============================================================================
 class ValidAuthToken(formencode.validators.FancyValidator):
     messages = {'invalid_token':_('Token mismatch')}
 
     def validate_python(self, value, state):
 
         if value != authentication_token():
             raise formencode.Invalid(self.message('invalid_token', state,
                                             search_number=value), value, state)
 
 def ValidUsername(edit, old_data):
     class _ValidUsername(formencode.validators.FancyValidator):
 
         def validate_python(self, value, state):
             if value in ['default', 'new_user']:
                 raise formencode.Invalid(_('Invalid username'), value, state)
             #check if user is unique
             old_un = None
             if edit:
                 old_un = UserModel().get(old_data.get('user_id')).username
 
             if old_un != value or not edit:
-                if UserModel().get_by_username(value, cache=False):
+                if UserModel().get_by_username(value.lower(), cache=False):
                     raise formencode.Invalid(_('This username already exists') ,
                                              value, state)
 
     return _ValidUsername
 
 class ValidPassword(formencode.validators.FancyValidator):
 
     def to_python(self, value, state):
 
         if value:
 
             if value.get('password'):
                 try:
                     value['password'] = get_crypt_password(value['password'])
                 except UnicodeEncodeError:
                     e_dict = {'password':_('Invalid characters in password')}
                     raise formencode.Invalid('', value, state, error_dict=e_dict)
 
             if value.get('password_confirmation'):
                 try:
                     value['password_confirmation'] = \
                         get_crypt_password(value['password_confirmation'])
                 except UnicodeEncodeError:
                     e_dict = {'password_confirmation':_('Invalid characters in password')}
                     raise formencode.Invalid('', value, state, error_dict=e_dict)
 
             if value.get('new_password'):
                 try:
                     value['new_password'] = \
                         get_crypt_password(value['new_password'])
                 except UnicodeEncodeError:
                     e_dict = {'new_password':_('Invalid characters in password')}
                     raise formencode.Invalid('', value, state, error_dict=e_dict)
 
             return value
 
 class ValidPasswordsMatch(formencode.validators.FancyValidator):
 
     def validate_python(self, value, state):
 
         if value['password'] != value['password_confirmation']:
             e_dict = {'password_confirmation':
                    _('Password do not match')}
             raise formencode.Invalid('', value, state, error_dict=e_dict)
 
 class ValidAuth(formencode.validators.FancyValidator):
     messages = {
             'invalid_password':_('invalid password'),
             'invalid_login':_('invalid user name'),
             'disabled_account':_('Your account is disabled')
 
             }
     #error mapping
     e_dict = {'username':messages['invalid_login'],
               'password':messages['invalid_password']}
     e_dict_disable = {'username':messages['disabled_account']}
 
     def validate_python(self, value, state):
         password = value['password']
         username = value['username']
         user = UserModel().get_by_username(username)
 
         if authfunc(None, username, password):
             return value
         else:
             if user and user.active is False:
                 log.warning('user %s is disabled', username)
                 raise formencode.Invalid(self.message('disabled_account',
                                          state=State_obj),
                                          value, state,
                                          error_dict=self.e_dict_disable)
             else:
                 log.warning('user %s not authenticated', username)
                 raise formencode.Invalid(self.message('invalid_password',
                                          state=State_obj), value, state,
                                          error_dict=self.e_dict)
 
 class ValidRepoUser(formencode.validators.FancyValidator):
 
     def to_python(self, value, state):
         sa = meta.Session()
         try:
             self.user_db = sa.query(User)\
                 .filter(User.active == True)\
                 .filter(User.username == value).one()
         except Exception:
             raise formencode.Invalid(_('This username is not valid'),
                                      value, state)
         finally:
             meta.Session.remove()
 
         return self.user_db.user_id
 
 def ValidRepoName(edit, old_data):
     class _ValidRepoName(formencode.validators.FancyValidator):
 
         def to_python(self, value, state):
             slug = h.repo_name_slug(value)
             if slug in ['_admin']:
                 raise formencode.Invalid(_('This repository name is disallowed'),
                                          value, state)
             if old_data.get('repo_name') != value or not edit:
                 if RepoModel().get_by_repo_name(slug, cache=False):
                     raise formencode.Invalid(_('This repository already exists') ,
                                              value, state)
             return slug
 
 
     return _ValidRepoName
 
 def ValidForkType(old_data):
     class _ValidForkType(formencode.validators.FancyValidator):
 
         def to_python(self, value, state):
             if old_data['repo_type'] != value:
                 raise formencode.Invalid(_('Fork have to be the same type as original'), value, state)
             return value
     return _ValidForkType
 
 class ValidPerms(formencode.validators.FancyValidator):
     messages = {'perm_new_user_name':_('This username is not valid')}
 
     def to_python(self, value, state):
         perms_update = []
         perms_new = []
         #build a list of permission to update and new permission to create
         for k, v in value.items():
             if k.startswith('perm_'):
                 if  k.startswith('perm_new_user'):
                     new_perm = value.get('perm_new_user', False)
                     new_user = value.get('perm_new_user_name', False)
                     if new_user and new_perm:
                         if (new_user, new_perm) not in perms_new:
                             perms_new.append((new_user, new_perm))
                 else:
                     usr = k[5:]
                     if usr == 'default':
                         if value['private']:
                             #set none for default when updating to private repo
                             v = 'repository.none'
                     perms_update.append((usr, v))
         value['perms_updates'] = perms_update
         value['perms_new'] = perms_new
         sa = meta.Session
         for k, v in perms_new:
             try:
                 self.user_db = sa.query(User)\
                     .filter(User.active == True)\
                     .filter(User.username == k).one()
             except Exception:
                 msg = self.message('perm_new_user_name',
                                      state=State_obj)
                 raise formencode.Invalid(msg, value, state, error_dict={'perm_new_user_name':msg})
         return value
 
 class ValidSettings(formencode.validators.FancyValidator):
 
     def to_python(self, value, state):
         #settings  form can't edit user
         if value.has_key('user'):
             del['value']['user']
 
         return value
 
 class ValidPath(formencode.validators.FancyValidator):
     def to_python(self, value, state):
 
         if not os.path.isdir(value):
             msg = _('This is not a valid path')
             raise formencode.Invalid(msg, value, state,
                                      error_dict={'paths_root_path':msg})
         return value
 
 def UniqSystemEmail(old_data):
     class _UniqSystemEmail(formencode.validators.FancyValidator):
         def to_python(self, value, state):
+            value = value.lower()
+            #TODO:write test for MixedCase scenarios
             if old_data.get('email') != value:
                 sa = meta.Session()
                 try:
                     user = sa.query(User).filter(User.email == value).scalar()
                     if user:
                         raise formencode.Invalid(_("That e-mail address is already taken") ,
                                                  value, state)
                 finally:
                     meta.Session.remove()
 
             return value
 
     return _UniqSystemEmail
 
 class ValidSystemEmail(formencode.validators.FancyValidator):
     def to_python(self, value, state):
+        value = value.lower()
         sa = meta.Session
         try:
             user = sa.query(User).filter(User.email == value).scalar()
             if  user is None:
                 raise formencode.Invalid(_("That e-mail address doesn't exist.") ,
                                          value, state)
         finally:
             meta.Session.remove()
 
         return value
 
 class LdapLibValidator(formencode.validators.FancyValidator):
 
     def to_python(self, value, state):
 
         try:
             import ldap
         except ImportError:
             raise LdapImportError
         return value
 
 #===============================================================================
 # FORMS        
 #===============================================================================
 class LoginForm(formencode.Schema):
     allow_extra_fields = True
     filter_extra_fields = True
     username = UnicodeString(
                              strip=True,
                              min=1,
                              not_empty=True,
                              messages={
                                        'empty':_('Please enter a login'),
                                        'tooShort':_('Enter a value %(min)i characters long or more')}
                             )
 
     password = UnicodeString(
                             strip=True,
                             min=6,
                             not_empty=True,
                             messages={
                                       'empty':_('Please enter a password'),
                                       'tooShort':_('Enter %(min)i characters or more')}
                                 )
 
 
     #chained validators have access to all data
     chained_validators = [ValidAuth]
 
 def UserForm(edit=False, old_data={}):
     class _UserForm(formencode.Schema):
         allow_extra_fields = True
         filter_extra_fields = True
         username = All(UnicodeString(strip=True, min=1, not_empty=True), ValidUsername(edit, old_data))
         if edit:
             new_password = All(UnicodeString(strip=True, min=6, not_empty=False))
             admin = StringBoolean(if_missing=False)
         else:
             password = All(UnicodeString(strip=True, min=6, not_empty=True))
         active = StringBoolean(if_missing=False)
         name = UnicodeString(strip=True, min=1, not_empty=True)
         lastname = UnicodeString(strip=True, min=1, not_empty=True)
         email = All(Email(not_empty=True), UniqSystemEmail(old_data))
 
         chained_validators = [ValidPassword]
 
     return _UserForm
 
 def RegisterForm(edit=False, old_data={}):
     class _RegisterForm(formencode.Schema):
         allow_extra_fields = True
         filter_extra_fields = True
         username = All(ValidUsername(edit, old_data), UnicodeString(strip=True, min=1, not_empty=True))
         password = All(UnicodeString(strip=True, min=6, not_empty=True))
         password_confirmation = All(UnicodeString(strip=True, min=6, not_empty=True))
         active = StringBoolean(if_missing=False)
         name = UnicodeString(strip=True, min=1, not_empty=True)
         lastname = UnicodeString(strip=True, min=1, not_empty=True)
         email = All(Email(not_empty=True), UniqSystemEmail(old_data))
 
         chained_validators = [ValidPasswordsMatch, ValidPassword]
 
     return _RegisterForm
 
 def PasswordResetForm():
     class _PasswordResetForm(formencode.Schema):
         allow_extra_fields = True
         filter_extra_fields = True
         email = All(ValidSystemEmail(), Email(not_empty=True))
     return _PasswordResetForm
 
 def RepoForm(edit=False, old_data={}, supported_backends=BACKENDS.keys()):
     class _RepoForm(formencode.Schema):
         allow_extra_fields = True
         filter_extra_fields = False
         repo_name = All(UnicodeString(strip=True, min=1, not_empty=True), ValidRepoName(edit, old_data))
         description = UnicodeString(strip=True, min=1, not_empty=True)
         private = StringBoolean(if_missing=False)
         repo_type = OneOf(supported_backends)
         if edit:
             user = All(Int(not_empty=True), ValidRepoUser)
 
         chained_validators = [ValidPerms]
     return _RepoForm
 
 def RepoForkForm(edit=False, old_data={}, supported_backends=BACKENDS.keys()):
     class _RepoForkForm(formencode.Schema):
         allow_extra_fields = True
         filter_extra_fields = False
         fork_name = All(UnicodeString(strip=True, min=1, not_empty=True), ValidRepoName(edit, old_data))
         description = UnicodeString(strip=True, min=1, not_empty=True)
         private = StringBoolean(if_missing=False)
         repo_type = All(ValidForkType(old_data), OneOf(supported_backends))
     return _RepoForkForm
 
 def RepoSettingsForm(edit=False, old_data={}):
     class _RepoForm(formencode.Schema):
         allow_extra_fields = True
         filter_extra_fields = False
         repo_name = All(UnicodeString(strip=True, min=1, not_empty=True), ValidRepoName(edit, old_data))
         description = UnicodeString(strip=True, min=1, not_empty=True)
         private = StringBoolean(if_missing=False)
 
         chained_validators = [ValidPerms, ValidSettings]
     return _RepoForm
 
 
 def ApplicationSettingsForm():
     class _ApplicationSettingsForm(formencode.Schema):
         allow_extra_fields = True
         filter_extra_fields = False
         rhodecode_title = UnicodeString(strip=True, min=1, not_empty=True)
         rhodecode_realm = UnicodeString(strip=True, min=1, not_empty=True)
 
     return _ApplicationSettingsForm
 
 def ApplicationUiSettingsForm():
     class _ApplicationUiSettingsForm(formencode.Schema):
         allow_extra_fields = True
         filter_extra_fields = False
         web_push_ssl = OneOf(['true', 'false'], if_missing='false')
         paths_root_path = All(ValidPath(), UnicodeString(strip=True, min=1, not_empty=True))
         hooks_changegroup_update = OneOf(['True', 'False'], if_missing=False)
         hooks_changegroup_repo_size = OneOf(['True', 'False'], if_missing=False)
         hooks_pretxnchangegroup_push_logger = OneOf(['True', 'False'], if_missing=False)
         hooks_preoutgoing_pull_logger = OneOf(['True', 'False'], if_missing=False)
 
     return _ApplicationUiSettingsForm
 
 def DefaultPermissionsForm(perms_choices, register_choices, create_choices):
     class _DefaultPermissionsForm(formencode.Schema):
         allow_extra_fields = True
         filter_extra_fields = True
         overwrite_default = StringBoolean(if_missing=False)
         anonymous = OneOf(['True', 'False'], if_missing=False)
         default_perm = OneOf(perms_choices)
         default_register = OneOf(register_choices)
         default_create = OneOf(create_choices)
 
     return _DefaultPermissionsForm
 
 
 def LdapSettingsForm():
     class _LdapSettingsForm(formencode.Schema):
         allow_extra_fields = True
         filter_extra_fields = True
         pre_validators = [LdapLibValidator]
         ldap_active = StringBoolean(if_missing=False)
         ldap_host = UnicodeString(strip=True,)
         ldap_port = Number(strip=True,)
         ldap_ldaps = StringBoolean(if_missing=False)
         ldap_dn_user = UnicodeString(strip=True,)
         ldap_dn_pass = UnicodeString(strip=True,)
         ldap_base_dn = UnicodeString(strip=True,)
 
     return _LdapSettingsForm