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Diffstat (limited to 'service/src/pixelated/authentication.py')
-rw-r--r-- | service/src/pixelated/authentication.py | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/service/src/pixelated/authentication.py b/service/src/pixelated/authentication.py new file mode 100644 index 00000000..b5edbec0 --- /dev/null +++ b/service/src/pixelated/authentication.py @@ -0,0 +1,85 @@ +# +# Copyright (c) 2014 ThoughtWorks, Inc. +# +# Pixelated is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# Pixelated 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 Affero General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with Pixelated. If not, see <http://www.gnu.org/licenses/>. +import re +from collections import namedtuple + +from leap.bitmask.bonafide.provider import Api +from leap.bitmask.bonafide.session import Session +from leap.bitmask.bonafide._srp import SRPAuthError + +from twisted.cred.error import UnauthorizedLogin +from twisted.internet.defer import inlineCallbacks, returnValue + +Credentials = namedtuple('Credentials', 'username, password') + + +class Authenticator(object): + def __init__(self, leap_provider): + self._leap_provider = leap_provider + self.domain = leap_provider.server_name + self.bonafide_session = None + + @inlineCallbacks + def authenticate(self, username, password): + username = self.clean_username(username) + auth = yield self._srp_auth(username, password) + returnValue(auth) + + @inlineCallbacks + def _srp_auth(self, username, password): + try: + auth = yield self._bonafide_auth(username, password) + except SRPAuthError: + raise UnauthorizedLogin("User typed wrong password/username combination.") + returnValue(auth) + + @inlineCallbacks + def _bonafide_auth(self, user, password): + srp_provider = Api(self._leap_provider.api_uri) + credentials = Credentials(user, password) + self.bonafide_session = Session(credentials, srp_provider, self._leap_provider.local_ca_crt) + yield self.bonafide_session.authenticate() + returnValue(Authentication(user, + self.bonafide_session.token, + self.bonafide_session.uuid, + 'session_id', + {'is_admin': False})) + + def clean_username(self, username): + if '@' not in username: + return username + extracted_username = self.extract_username(username) + if self.username_with_domain(extracted_username) == username: + return extracted_username + raise UnauthorizedLogin('User typed a wrong domain.') + + def extract_username(self, username): + return re.search('^([^@]+)@?.*$', username).group(1) + + def username_with_domain(self, username): + return '%s@%s' % (username, self.domain) + + +class Authentication(object): + def __init__(self, username, token, uuid, session_id, user_attributes): + self.username = username + self.token = token + self.uuid = uuid + self.session_id = session_id + self._user_attributes = user_attributes + + def is_admin(self): + return self._user_attributes.get('is_admin', False) |