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# -*- coding: utf-8 -*-
# eipbootstrapper.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/>.
"""
EIP bootstrapping
"""
import logging
import os
from PySide import QtCore
from leap.common.check import leap_assert, leap_assert_type
from leap.common import certs
from leap.common.files import check_and_fix_urw_only, get_mtime, mkdir_p
from leap.config.providerconfig import ProviderConfig
from leap.crypto.srpauth import SRPAuth
from leap.services.eip.eipconfig import EIPConfig
from leap.util.request_helpers import get_content
from leap.util.constants import REQUEST_TIMEOUT
from leap.services.abstractbootstrapper import AbstractBootstrapper
logger = logging.getLogger(__name__)
class EIPBootstrapper(AbstractBootstrapper):
"""
Sets up EIP for a provider a series of checks and emits signals
after they are passed.
If a check fails, the subsequent checks are not executed
"""
# All dicts returned are of the form
# {"passed": bool, "error": str}
download_config = QtCore.Signal(dict)
download_client_certificate = QtCore.Signal(dict)
def __init__(self):
AbstractBootstrapper.__init__(self)
self._provider_config = None
self._eip_config = None
self._download_if_needed = False
def _download_config(self, *args):
"""
Downloads the EIP config for the given provider
"""
leap_assert(self._provider_config,
"We need a provider configuration!")
logger.debug("Downloading EIP config for %s" %
(self._provider_config.get_domain(),))
api_version = self._provider_config.get_api_version()
self._eip_config = EIPConfig()
self._eip_config.set_api_version(api_version)
headers = {}
mtime = get_mtime(os.path.join(self._eip_config
.get_path_prefix(),
"leap",
"providers",
self._provider_config.get_domain(),
"eip-service.json"))
if self._download_if_needed and mtime:
headers['if-modified-since'] = mtime
# there is some confusion with this uri,
# it's in 1/config/eip, config/eip and config/1/eip...
config_uri = "%s/%s/config/eip-service.json" % (
self._provider_config.get_api_uri(),
api_version)
logger.debug('Downloading eip config from: %s' % config_uri)
res = self._session.get(config_uri,
verify=self._provider_config
.get_ca_cert_path(),
headers=headers,
timeout=REQUEST_TIMEOUT)
res.raise_for_status()
# Not modified
if res.status_code == 304:
logger.debug("EIP definition has not been modified")
else:
eip_definition, mtime = get_content(res)
self._eip_config.load(data=eip_definition, mtime=mtime)
self._eip_config.save(["leap",
"providers",
self._provider_config.get_domain(),
"eip-service.json"])
def _download_client_certificates(self, *args):
"""
Downloads the EIP client certificate for the given provider
"""
leap_assert(self._provider_config, "We need a provider configuration!")
leap_assert(self._eip_config, "We need an eip configuration!")
logger.debug("Downloading EIP client certificate for %s" %
(self._provider_config.get_domain(),))
client_cert_path = self._eip_config.\
get_client_cert_path(self._provider_config,
about_to_download=True)
# For re-download if something is wrong with the cert
self._download_if_needed = self._download_if_needed and \
not certs.should_redownload(client_cert_path)
if self._download_if_needed and \
os.path.exists(client_cert_path):
check_and_fix_urw_only(client_cert_path)
return
srp_auth = SRPAuth(self._provider_config)
session_id = srp_auth.get_session_id()
cookies = None
if session_id:
cookies = {"_session_id": session_id}
cert_uri = "%s/%s/cert" % (
self._provider_config.get_api_uri(),
self._provider_config.get_api_version())
logger.debug('getting cert from uri: %s' % cert_uri)
res = self._session.get(cert_uri,
verify=self._provider_config
.get_ca_cert_path(),
cookies=cookies,
timeout=REQUEST_TIMEOUT)
res.raise_for_status()
client_cert = res.content
if not certs.is_valid_pemfile(client_cert):
raise Exception(self.tr("The downloaded certificate is not a "
"valid PEM file"))
mkdir_p(os.path.dirname(client_cert_path))
with open(client_cert_path, "w") as f:
f.write(client_cert)
check_and_fix_urw_only(client_cert_path)
def run_eip_setup_checks(self,
provider_config,
download_if_needed=False):
"""
Starts the checks needed for a new eip setup
:param provider_config: Provider configuration
:type provider_config: ProviderConfig
"""
leap_assert(provider_config, "We need a provider config!")
leap_assert_type(provider_config, ProviderConfig)
self._provider_config = provider_config
self._download_if_needed = download_if_needed
cb_chain = [
(self._download_config, self.download_config),
(self._download_client_certificates,
self.download_client_certificate)
]
return self.addCallbackChain(cb_chain)
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