def verify(self, **kwargs):
if "aud" in self:
if "client_id" in kwargs:
# check that it's for me
if self["aud"] != kwargs["client_id"]:
return False
if "id_token" in self:
# Try to decode the JWT, checks the signature
idt = IdToken().from_jwt(str(self["id_token"]), kwargs["key"])
if not idt.verify(**kwargs):
return False
hfunc = "HS"+ jwt.unpack(self["id_token"])[0]["alg"][-3:]
if "access_token" in self:
try:
assert "at_hash" in idt
except AssertionError:
raise Exception("Missing at_hash property")
try:
assert idt["at_hash"] == jwt.left_hash(
self["access_token"], hfunc )
except AssertionError:
raise Exception("Failed to verify access_token hash")
if "code" in self:
try:
assert "c_hash" in idt
except AssertionError:
raise Exception("Missing c_hash property")
try:
assert idt["c_hash"] == jwt.left_hash(self["code"], hfunc)
except AssertionError:
raise Exception("Failed to verify code hash")
self["id_token"] = idt
return super(self.__class__, self).verify(**kwargs)
def test_make_id_token():
srv = Server(KEYS)
session = {"user_id": "user0", "client_id": "http://oic.example/rp"}
issuer = "http://oic.example/idp"
code = "abcdefghijklmnop"
idt_jwt = srv.make_id_token(session, loa="2", issuer=issuer, code=code, access_token="access_token")
jwt_keys = srv.keystore.get_keys("ver", owner=None)
idt = IdToken().from_jwt(idt_jwt, key=jwt_keys)
print idt
header = unpack(idt_jwt)
lha = left_hash(code, func="HS" + header[0]["alg"][-3:])
assert lha == idt["c_hash"]
atr = AccessTokenResponse(id_token=idt_jwt, access_token="access_token", token_type="Bearer")
atr["code"] = code
assert atr.verify(key=jwt_keys)
def test_left_hash_hs512():
hsh = jwt.left_hash("Please take a moment to register today", "HS512")
assert hsh == "_h6feWLt8zbYcOFnaBmekTzMJYEHdVTaXlDgJSWsEeY"
def test_left_hash_hs256():
hsh = jwt.left_hash("Please take a moment to register today")
assert hsh == "rCFHVJuxTqRxOsn2IUzgvA"
def make_id_token(self, session, loa="2", issuer="",
keytype="rsa", code=None, access_token=None,
user_info=None):
#defaults
inawhile = {"days": 1}
# Handle the idtoken_claims
extra = {}
try:
oidreq = OpenIDRequest().deserialize(session["oidreq"], "json")
itc = oidreq["id_token"]
logger.debug("ID Token claims: %s" % itc.to_dict())
try:
inawhile = {"seconds": itc["max_age"]}
except KeyError:
inawhile = {}
if "claims" in itc:
for key, val in itc["claims"].items():
if key == "auth_time":
extra["auth_time"] = time_util.utc_time_sans_frac()
elif key == "acr":
#["2","http://id.incommon.org/assurance/bronze"]
extra["acr"] = verify_acr_level(val, loa)
except KeyError:
pass
if user_info is None:
_args = {}
else:
_args = user_info.to_dict()
# Make sure that there are no name clashes
for key in ["iss", "user_id", "aud", "exp", "acr", "nonce",
"auth_time"]:
try:
del _args[key]
except KeyError:
pass
if code:
_args["c_hash"] = jwt.left_hash(code, "HS256")
if access_token:
_args["at_hash"] = jwt.left_hash(access_token, "HS256")
idt = IdToken(iss=issuer, user_id=session["user_id"],
aud = session["client_id"],
exp = time_util.epoch_in_a_while(**inawhile), acr=loa,
**_args)
for key, val in extra.items():
idt[key] = val
if "nonce" in session:
idt.nonce = session["nonce"]
# sign with clients secret key
_keystore = self.keystore
if keytype == "hmac":
ckey = {"hmac":
_keystore.get_sign_key("hmac",
owner=session["client_id"])}
algo = "HS256"
elif keytype == "rsa": # own asymmetric key
algo = "RS256"
ckey = {"rsa": _keystore.get_sign_key("rsa")}
else:
algo = "ES256"
ckey = {"ec":_keystore.get_sign_key("ec")}
logger.debug("Sign idtoken with '%s'" % (ckey,))
return idt.to_jwt(key=ckey, algorithm=algo)