|
from oic.exception import MissingAttribute
|
|
from oic import oic
|
|
from oic.oauth2 import rndstr, ErrorResponse
|
|
from oic.oic import ProviderConfigurationResponse, AuthorizationResponse
|
|
from oic.oic import RegistrationResponse
|
|
from oic.oic import AuthorizationRequest
|
|
from oic.utils.authn.client import CLIENT_AUTHN_METHOD
|
|
|
|
import logging
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
import conf
|
|
|
|
class OIDCError(Exception):
|
|
pass
|
|
|
|
|
|
class Client(oic.Client):
|
|
def __init__(self, client_id=None, ca_certs=None,
|
|
client_prefs=None, client_authn_method=None, keyjar=None,
|
|
verify_ssl=True, behaviour=None):
|
|
oic.Client.__init__(self, client_id, ca_certs, client_prefs,
|
|
client_authn_method, keyjar, verify_ssl)
|
|
if behaviour:
|
|
self.behaviour = behaviour
|
|
|
|
def create_authn_request(self, session, acr_value=None):
|
|
session["state"] = rndstr()
|
|
session["nonce"] = rndstr()
|
|
request_args = {
|
|
"response_type": self.behaviour["response_type"],
|
|
"scope": self.behaviour["scope"],
|
|
"state": session["state"],
|
|
# "nonce": session["nonce"],
|
|
"redirect_uri": self.registration_response["redirect_uris"][0]
|
|
}
|
|
|
|
if acr_value is not None:
|
|
request_args["acr_values"] = acr_value
|
|
|
|
cis = self.construct_AuthorizationRequest(request_args=request_args)
|
|
logger.debug("request: %s" % cis)
|
|
|
|
url, body, ht_args, cis = self.uri_and_body(AuthorizationRequest, cis,
|
|
method="GET",
|
|
request_args=request_args)
|
|
|
|
logger.debug("body: %s" % body)
|
|
logger.info("URL: %s" % url)
|
|
logger.debug("ht_args: %s" % ht_args)
|
|
|
|
return str(url), ht_args
|
|
|
|
def callback(self, response):
|
|
"""
|
|
This is the method that should be called when an AuthN response has been
|
|
received from the OP.
|
|
|
|
:param response: The URL returned by the OP
|
|
:return:
|
|
"""
|
|
authresp = self.parse_response(AuthorizationResponse, response,
|
|
sformat="dict", keyjar=self.keyjar)
|
|
|
|
if isinstance(authresp, ErrorResponse):
|
|
return OIDCError("Access denied")
|
|
|
|
try:
|
|
self.id_token[authresp["state"]] = authresp["id_token"]
|
|
except KeyError:
|
|
pass
|
|
|
|
if self.behaviour["response_type"] == "code":
|
|
# get the access token
|
|
try:
|
|
args = {
|
|
"grant_type": "authorization_code",
|
|
"code": authresp["code"],
|
|
"redirect_uri": self.registration_response[
|
|
"redirect_uris"][0],
|
|
"client_id": self.client_id,
|
|
"client_secret": self.client_secret
|
|
}
|
|
|
|
atresp = self.do_access_token_request(
|
|
scope="openid", state=authresp["state"], request_args=args,
|
|
authn_method=self.registration_response["token_endpoint_auth_method"])
|
|
except Exception as err:
|
|
logger.error("%s" % err)
|
|
raise
|
|
|
|
if isinstance(atresp, ErrorResponse):
|
|
raise OIDCError("Invalid response %s." % atresp["error"])
|
|
|
|
inforesp = self.do_user_info_request(state=authresp["state"],
|
|
behavior='use_authorization_header')
|
|
|
|
if isinstance(inforesp, ErrorResponse):
|
|
raise OIDCError("Invalid response %s." % inforesp["error"])
|
|
|
|
userinfo = inforesp.to_dict()
|
|
|
|
logger.debug("UserInfo: %s" % inforesp)
|
|
|
|
return userinfo
|
|
|
|
def create_client(**kwargs):
|
|
"""
|
|
kwargs = config.CLIENT.iteritems
|
|
"""
|
|
_key_set = set(kwargs.keys())
|
|
args = {}
|
|
for param in ["verify_ssl"]:
|
|
try:
|
|
args[param] = kwargs[param]
|
|
except KeyError:
|
|
pass
|
|
else:
|
|
_key_set.discard(param)
|
|
|
|
client = Client(client_authn_method=CLIENT_AUTHN_METHOD,
|
|
behaviour=kwargs["behaviour"],
|
|
verify_ssl=conf.VERIFY_SSL, **args)
|
|
|
|
# The behaviour parameter is not significant for the election process
|
|
_key_set.discard("behaviour")
|
|
for param in ["allow"]:
|
|
try:
|
|
setattr(client, param, kwargs[param])
|
|
except KeyError:
|
|
pass
|
|
else:
|
|
_key_set.discard(param)
|
|
|
|
if _key_set == set(["client_info"]): # Everything dynamic
|
|
# There has to be a userid
|
|
if not userid:
|
|
raise MissingAttribute("Missing userid specification")
|
|
|
|
# Find the service that provides information about the OP
|
|
issuer = client.wf.discovery_query(userid)
|
|
# Gather OP information
|
|
_ = client.provider_config(issuer)
|
|
# register the client
|
|
_ = client.register(client.provider_info["registration_endpoint"],
|
|
**kwargs["client_info"])
|
|
elif _key_set == set(["client_info", "srv_discovery_url"]):
|
|
# Ship the webfinger part
|
|
# Gather OP information
|
|
_ = client.provider_config(kwargs["srv_discovery_url"])
|
|
# register the client
|
|
_ = client.register(client.provider_info["registration_endpoint"],
|
|
**kwargs["client_info"])
|
|
elif _key_set == set(["provider_info", "client_info"]):
|
|
client.handle_provider_config(
|
|
ProviderConfigurationResponse(**kwargs["provider_info"]),
|
|
kwargs["provider_info"]["issuer"])
|
|
_ = client.register(client.provider_info["registration_endpoint"],
|
|
**kwargs["client_info"])
|
|
elif _key_set == set(["provider_info", "client_registration"]):
|
|
client.handle_provider_config(
|
|
ProviderConfigurationResponse(**kwargs["provider_info"]),
|
|
kwargs["provider_info"]["issuer"])
|
|
client.store_registration_info(RegistrationResponse(
|
|
**kwargs["client_registration"]))
|
|
elif _key_set == set(["srv_discovery_url", "client_registration"]):
|
|
_ = client.provider_config(kwargs["srv_discovery_url"])
|
|
client.store_registration_info(RegistrationResponse(
|
|
**kwargs["client_registration"]))
|
|
else:
|
|
raise Exception("Configuration error ?")
|
|
|
|
return client
|