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# -*- coding: utf-8 -*-
# srpregister.py
# Copyright (C) 2013 LEAP
#
# 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 binascii
import json
import logging
import requests
import srp
from PySide import QtCore
from urlparse import urlparse
from leap.bitmask.config.providerconfig import ProviderConfig
from leap.bitmask.util.constants import SIGNUP_TIMEOUT
from leap.bitmask.util.request_helpers import get_content
from leap.common.check import leap_assert, leap_assert_type
logger = logging.getLogger(__name__)
class SRPRegister(QtCore.QObject):
"""
Registers a user to a specific provider using SRP
"""
USER_LOGIN_KEY = 'user[login]'
USER_VERIFIER_KEY = 'user[password_verifier]'
USER_SALT_KEY = 'user[password_salt]'
STATUS_OK = (200, 201)
STATUS_TAKEN = 422
STATUS_ERROR = -999 # Custom error status
def __init__(self, signaler=None,
provider_config=None, register_path="users"):
"""
Constructor
:param signaler: Signaler object used to receive notifications
from the backend
:type signaler: Signaler
:param provider_config: provider configuration instance,
properly loaded
:type privider_config: ProviderConfig
:param register_path: webapp path for registering users
:type register_path; str
"""
QtCore.QObject.__init__(self)
leap_assert(provider_config, "Please provide a provider")
leap_assert_type(provider_config, ProviderConfig)
self._provider_config = provider_config
self._signaler = signaler
# **************************************************** #
# Dependency injection helpers, override this for more
# granular testing
self._fetcher = requests
self._srp = srp
self._hashfun = self._srp.SHA256
self._ng = self._srp.NG_1024
# **************************************************** #
parsed_url = urlparse(provider_config.get_api_uri())
self._provider = parsed_url.hostname
self._port = parsed_url.port
if self._port is None:
self._port = "443"
self._register_path = register_path
self._session = self._fetcher.session()
def _get_registration_uri(self):
"""
Returns the URI where the register request should be made for
the provider
:rtype: str
"""
uri = "https://%s:%s/%s/%s" % (
self._provider,
self._port,
self._provider_config.get_api_version(),
self._register_path)
return uri
def register_user(self, username, password):
"""
Registers a user with the validator based on the password provider
:param username: username to register
:type username: str
:param password: password for this username
:type password: str
:returns: if the registration went ok or not.
:rtype: bool
"""
username = username.lower().encode('utf-8')
password = password.encode('utf-8')
salt, verifier = self._srp.create_salted_verification_key(
username,
password,
self._hashfun,
self._ng)
user_data = {
self.USER_LOGIN_KEY: username,
self.USER_VERIFIER_KEY: binascii.hexlify(verifier),
self.USER_SALT_KEY: binascii.hexlify(salt)
}
uri = self._get_registration_uri()
logger.debug('Post to uri: %s' % uri)
logger.debug("Will try to register user = %s" % (username,))
ok = False
req = None
try:
req = self._session.post(uri,
data=user_data,
timeout=SIGNUP_TIMEOUT,
verify=self._provider_config.
get_ca_cert_path())
except requests.exceptions.RequestException as exc:
logger.error(exc.message)
else:
ok = req.ok
status_code = self.STATUS_ERROR
if req is not None:
status_code = req.status_code
self._emit_result(status_code)
if not ok:
try:
content, _ = get_content(req)
json_content = json.loads(content)
error_msg = json_content.get("errors").get("login")[0]
if not error_msg.istitle():
error_msg = "%s %s" % (username, error_msg)
logger.error(error_msg)
except Exception as e:
logger.error("Unknown error: %r" % (e, ))
return ok
def _emit_result(self, status_code):
"""
Emit the corresponding signal depending on the status code.
:param status_code: the status code received.
:type status_code: int or str
"""
logger.debug("Status code is: {0}".format(status_code))
if self._signaler is None:
return
if status_code in self.STATUS_OK:
self._signaler.signal(self._signaler.srp_registration_finished)
elif status_code == self.STATUS_TAKEN:
self._signaler.signal(self._signaler.srp_registration_taken)
else:
self._signaler.signal(self._signaler.srp_registration_failed)
if __name__ == "__main__":
logger = logging.getLogger(name='leap')
logger.setLevel(logging.DEBUG)
console = logging.StreamHandler()
console.setLevel(logging.DEBUG)
formatter = logging.Formatter(
'%(asctime)s '
'- %(name)s - %(levelname)s - %(message)s')
console.setFormatter(formatter)
logger.addHandler(console)
provider = ProviderConfig()
if provider.load("leap/providers/bitmask.net/provider.json"):
register = SRPRegister(provider_config=provider)
print "Registering user..."
print register.register_user("test1", "sarasaaaa")
print register.register_user("test2", "sarasaaaa")
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