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|
# -*- coding: utf-8 -*-
"""
rhodecode.lib.auth
~~~~~~~~~~~~~~~~~~
authentication and permission libraries
:created_on: Apr 4, 2010
:author: marcink
:copyright: (C) 2010-2012 Marcin Kuzminski <marcin@python-works.com>
:license: GPLv3, see COPYING 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, either version 3 of the License, or
# (at your option) any later version.
#
# 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, see <http://www.gnu.org/licenses/>.
import random
import logging
import traceback
import hashlib
from tempfile import _RandomNameSequence
from decorator import decorator
from pylons import config, url, request
from pylons.controllers.util import abort, redirect
from pylons.i18n.translation import _
from rhodecode import __platform__, is_windows, is_unix
from rhodecode.model.meta import Session
from rhodecode.lib.utils2 import str2bool, safe_unicode
from rhodecode.lib.exceptions import LdapPasswordError, LdapUsernameError
from rhodecode.lib.utils import get_repo_slug, get_repos_group_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, RhodeCodeSetting, User, UserIpMap
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
passwd_gen.gen_password(8, passwd_gen.ALPHABETS_BIG_SMALL)
"""
ALPHABETS_NUM = r'''1234567890'''
ALPHABETS_SMALL = r'''qwertyuiopasdfghjklzxcvbnm'''
ALPHABETS_BIG = r'''QWERTYUIOPASDFGHJKLZXCVBNM'''
ALPHABETS_SPECIAL = r'''`-=[]\;',./~!@#$%^&*()_+{}|:"<>?'''
ALPHABETS_FULL = ALPHABETS_BIG + ALPHABETS_SMALL \
+ ALPHABETS_NUM + ALPHABETS_SPECIAL
ALPHABETS_ALPHANUM = ALPHABETS_BIG + ALPHABETS_SMALL + ALPHABETS_NUM
ALPHABETS_BIG_SMALL = ALPHABETS_BIG + ALPHABETS_SMALL
ALPHABETS_ALPHANUM_BIG = ALPHABETS_BIG + ALPHABETS_NUM
ALPHABETS_ALPHANUM_SMALL = ALPHABETS_SMALL + ALPHABETS_NUM
def __init__(self, passwd=''):
self.passwd = passwd
def gen_password(self, length, type_=None):
if type_ is None:
type_ = self.ALPHABETS_FULL
self.passwd = ''.join([random.choice(type_) for _ in xrange(length)])
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 is_windows:
from hashlib import sha256
return sha256(str_).hexdigest()
elif is_unix:
import bcrypt
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 is_windows:
from hashlib import sha256
return sha256(password).hexdigest() == hashed
elif is_unix:
import bcrypt
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(str_, salt=None):
"""
Generates API KEY from given string
:param str_:
:param salt:
"""
if salt is None:
salt = _RandomNameSequence().next()
return hashlib.sha1(str_ + salt).hexdigest()
def authfunc(environ, username, password):
"""
Dummy authentication wrapper function used in Mercurial and Git for
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.get_by_username(username)
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 tried auth but is disabled' % username)
else:
log.debug('Regular authentication failed')
user_obj = User.get_by_username(username, 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
ldap_settings = RhodeCodeSetting.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'),
'tls_kind': ldap_settings.get('ldap_tls_kind'),
'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)
get_ldap_attr = lambda k: ldap_attrs.get(ldap_settings\
.get(k), [''])[0]
user_attrs = {
'name': safe_unicode(get_ldap_attr('ldap_attr_firstname')),
'lastname': safe_unicode(get_ldap_attr('ldap_attr_lastname')),
'email': get_ldap_attr('ldap_attr_email'),
}
# don't store LDAP password since we don't need it. Override
# with some random generated password
_password = PasswordGenerator().gen_password(length=8)
# create this user on the fly if it doesn't exist in rhodecode
# database
if user_model.create_ldap(username, _password, user_dn,
user_attrs):
log.info('created new ldap user %s' % username)
Session().commit()
return True
except (LdapUsernameError, LdapPasswordError,):
pass
except (Exception,):
log.error(traceback.format_exc())
pass
return False
def login_container_auth(username):
user = User.get_by_username(username)
if user is None:
user_attrs = {
'name': username,
'lastname': None,
'email': None,
}
user = UserModel().create_for_container_auth(username, user_attrs)
if not user:
return None
log.info('User %s was created by container authentication' % username)
if not user.active:
return None
user.update_lastlogin()
Session().commit()
log.debug('User %s is now logged in by container authentication',
user.username)
return user
def get_container_username(environ, config):
username = None
if str2bool(config.get('container_auth_enabled', False)):
from paste.httpheaders import REMOTE_USER
username = REMOTE_USER(environ)
if not username and str2bool(config.get('proxypass_auth_enabled', False)):
username = environ.get('HTTP_X_FORWARDED_USER')
if username:
# Removing realm and domain from username
username = username.partition('@')[0]
username = username.rpartition('\\')[2]
log.debug('Received username %s from container' % username)
return username
class CookieStoreWrapper(object):
def __init__(self, cookie_store):
self.cookie_store = cookie_store
def __repr__(self):
return 'CookieStore<%s>' % (self.cookie_store)
def get(self, key, other=None):
if isinstance(self.cookie_store, dict):
return self.cookie_store.get(key, other)
elif isinstance(self.cookie_store, AuthUser):
return self.cookie_store.__dict__.get(key, other)
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, username=None, ip_addr=None):
self.user_id = user_id
self.api_key = None
self.username = username
self.ip_addr = ip_addr
self.name = ''
self.lastname = ''
self.email = ''
self.is_authenticated = False
self.admin = False
self.inherit_default_permissions = False
self.permissions = {}
self.allowed_ips = set()
self._api_key = api_key
self.propagate_data()
self._instance = None
def propagate_data(self):
user_model = UserModel()
self.anonymous_user = User.get_by_username('default', cache=True)
is_user_loaded = False
# try go get user by api key
if self._api_key and self._api_key != self.anonymous_user.api_key:
log.debug('Auth User lookup by API KEY %s' % self._api_key)
is_user_loaded = user_model.fill_data(self, api_key=self._api_key)
# lookup by userid
elif (self.user_id is not None and
self.user_id != self.anonymous_user.user_id):
log.debug('Auth User lookup by USER ID %s' % self.user_id)
is_user_loaded = user_model.fill_data(self, user_id=self.user_id)
# lookup by username
elif self.username and \
str2bool(config.get('container_auth_enabled', False)):
log.debug('Auth User lookup by USER NAME %s' % self.username)
dbuser = login_container_auth(self.username)
if dbuser is not None:
log.debug('filling all attributes to object')
for k, v in dbuser.get_dict().items():
setattr(self, k, v)
self.set_authenticated()
is_user_loaded = True
else:
log.debug('No data in %s that could been used to log in' % self)
if not is_user_loaded:
# if we cannot authenticate user try anonymous
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.user_id = None
self.username = None
self.is_authenticated = False
if not self.username:
self.username = 'None'
log.debug('Auth User is now %s' % self)
user_model.fill_perms(self)
log.debug('Filling Allowed IPs')
self.allowed_ips = AuthUser.get_allowed_ips(self.user_id)
@property
def is_admin(self):
return self.admin
def __repr__(self):
return "<AuthUser('id:%s:%s|%s')>" % (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 get_cookie_store(self):
return {'username': self.username,
'user_id': self.user_id,
'is_authenticated': self.is_authenticated}
@classmethod
def from_cookie_store(cls, cookie_store):
"""
Creates AuthUser from a cookie store
:param cls:
:param cookie_store:
"""
user_id = cookie_store.get('user_id')
username = cookie_store.get('username')
api_key = cookie_store.get('api_key')
return AuthUser(user_id, api_key, username)
@classmethod
def get_allowed_ips(cls, user_id):
_set = set()
user_ips = UserIpMap.query().filter(UserIpMap.user_id == user_id).all()
for ip in user_ips:
_set.add(ip.ip_addr)
return _set or set(['0.0.0.0/0'])
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 Exception:
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")
loc = "%s:%s" % (cls.__class__.__name__, func.__name__)
log.debug('Checking if %s is authenticated @ %s' % (user.username, loc))
if user.is_authenticated or api_access_ok:
reason = 'RegularAuth' if user.is_authenticated else 'APIAuth'
log.info('user %s is authenticated and granted access to %s '
'using %s' % (user.username, loc, reason)
)
return func(*fargs, **fkwargs)
else:
log.warn('user %s NOT authenticated on func: %s' % (
user, loc)
)
p = url.current()
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 = url.current()
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.debug('Permission denied for %s %s' % (cls, self.user))
anonymous = self.user.username == 'default'
if anonymous:
p = url.current()
import rhodecode.lib.helpers as h
h.flash(_('You need to be a signed in to '
'view this page'),
category='warning')
return redirect(url('login_home', came_from=p))
else:
# 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
class HasReposGroupPermissionAllDecorator(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):
group_name = get_repos_group_slug(request)
try:
user_perms = set([self.user_perms['repositories_groups'][group_name]])
except KeyError:
return False
if self.required_perms.issubset(user_perms):
return True
return False
class HasReposGroupPermissionAnyDecorator(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):
group_name = get_repos_group_slug(request)
try:
user_perms = set([self.user_perms['repositories_groups'][group_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 is not defined" % perm)
self.required_perms = set(perms)
self.user_perms = None
self.repo_name = None
self.group_name = None
def __call__(self, check_Location=''):
user = request.user
cls_name = self.__class__.__name__
check_scope = {
'HasPermissionAll': '',
'HasPermissionAny': '',
'HasRepoPermissionAll': 'repo:%s' % self.repo_name,
'HasRepoPermissionAny': 'repo:%s' % self.repo_name,
'HasReposGroupPermissionAll': 'group:%s' % self.group_name,
'HasReposGroupPermissionAny': 'group:%s' % self.group_name,
}.get(cls_name, '?')
log.debug('checking cls:%s %s usr:%s %s @ %s', cls_name,
self.required_perms, user, check_scope,
check_Location or 'unspecified location')
if not user:
log.debug('Empty request user')
return False
self.user_perms = user.permissions
if self.check_permissions():
log.debug('Permission granted for user: %s @ %s', user,
check_Location or 'unspecified location')
return True
else:
log.debug('Permission denied for user: %s @ %s', user,
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
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
if self.required_perms.intersection(self._user_perms):
return True
return False
class HasReposGroupPermissionAny(PermsFunction):
def __call__(self, group_name=None, check_Location=''):
self.group_name = group_name
return super(HasReposGroupPermissionAny, self).__call__(check_Location)
def check_permissions(self):
try:
self._user_perms = set(
[self.user_perms['repositories_groups'][self.group_name]]
)
except KeyError:
return False
if self.required_perms.intersection(self._user_perms):
return True
return False
class HasReposGroupPermissionAll(PermsFunction):
def __call__(self, group_name=None, check_Location=''):
self.group_name = group_name
return super(HasReposGroupPermissionAll, self).__call__(check_Location)
def check_permissions(self):
try:
self._user_perms = set(
[self.user_perms['repositories_groups'][self.group_name]]
)
except KeyError:
return False
if self.required_perms.issubset(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):
# repo_name MUST be unicode, since we handle keys in permission
# dict by unicode
repo_name = safe_unicode(repo_name)
usr = AuthUser(user.user_id)
try:
self.user_perms = set([usr.permissions['repositories'][repo_name]])
except Exception:
log.error('Exception while accessing permissions %s' %
traceback.format_exc())
self.user_perms = set()
self.username = user.username
self.repo_name = repo_name
return self.check_permissions()
def check_permissions(self):
log.debug('checking VCS 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 for user:%s on repo:%s' % (
self.username, self.repo_name
)
)
return True
log.debug('permission denied for user:%s on repo:%s' % (
self.username, self.repo_name
)
)
return False
def check_ip_access(source_ip, allowed_ips=None):
"""
Checks if source_ip is a subnet of any of allowed_ips.
:param source_ip:
:param allowed_ips: list of allowed ips together with mask
"""
from rhodecode.lib import ipaddr
log.debug('checking if ip:%s is subnet of %s' % (source_ip, allowed_ips))
if isinstance(allowed_ips, (tuple, list, set)):
for ip in allowed_ips:
if ipaddr.IPAddress(source_ip) in ipaddr.IPNetwork(ip):
return True
return False
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