def load_key(header, payload):
jwk_set = JsonWebKey.import_key_set(self.fetch_jwk_set())
try:
return jwk_set.find_by_kid(header.get('kid'))
except ValueError:
# re-try with new jwk set
jwk_set = JsonWebKey.import_key_set(
self.fetch_jwk_set(force=True))
return jwk_set.find_by_kid(header.get('kid'))
def test_import_key_set(self):
jwks_public = read_file_path('jwks_public.json')
key_set1 = JsonWebKey.import_key_set(jwks_public)
key1 = key_set1.find_by_kid('abc')
self.assertEqual(key1['e'], 'AQAB')
key_set2 = JsonWebKey.import_key_set(jwks_public['keys'])
key2 = key_set2.find_by_kid('abc')
self.assertEqual(key2['e'], 'AQAB')
key_set3 = JsonWebKey.import_key_set(json_dumps(jwks_public))
key3 = key_set3.find_by_kid('abc')
self.assertEqual(key3['e'], 'AQAB')
self.assertRaises(ValueError, JsonWebKey.import_key_set, 'invalid')
def load_key(header, _):
alg = header.get("alg")
if alg in ["HS256", "HS384", "HS512"]:
# For HS256: client secret is used for id_token signing
return self.client_secret
elif alg in ["RS256", "RS384", "RS512"]:
jwk_set = JsonWebKey.import_key_set(self.fetch_jwk_set())
try:
return jwk_set.find_by_kid(header.get("kid"))
except ValueError:
# re-try with new jwk set
jwk_set = JsonWebKey.import_key_set(
self.fetch_jwk_set(force=True))
return jwk_set.find_by_kid(header.get("kid"))
else:
raise RuntimeError(f"Unsupported id_token algorithm: '{alg}'")
def fetch_keys(self):
if not self.key_url:
return
response = requests.get(self.key_url)
if response.ok:
data = response.json()
self._keyset = JsonWebKey.import_key_set(data)
def verifyToken(self, accessToken=None, jwks=None):
"""Verify access token
:param str accessToken: access token
:param dict jwks: JWKs
:return: dict
"""
# Define an access token
if not accessToken:
accessToken = self.token["access_token"]
# Renew a JWKs of an identity provider if needed
if not jwks:
result = self.updateJWKs()
if not result["OK"]:
return result
jwks = self.jwks
if not jwks:
return S_ERROR("JWKs not found.")
# Try to decode and verify an access token
self.log.debug("Try to decode token %s with JWKs:\n" % accessToken, pprint.pformat(jwks))
try:
return S_OK(jwt.decode(accessToken, JsonWebKey.import_key_set(jwks)))
except Exception as e:
self.log.exception(e)
return S_ERROR(repr(e))
async def parse_id_token(self, token, nonce, claims_options=None):
"""Return an instance of UserInfo from token's ``id_token``."""
claims_params = dict(
nonce=nonce,
client_id=self.client_id,
)
if 'access_token' in token:
claims_params['access_token'] = token['access_token']
claims_cls = CodeIDToken
else:
claims_cls = ImplicitIDToken
metadata = await self.load_server_metadata()
if claims_options is None and 'issuer' in metadata:
claims_options = {'iss': {'values': [metadata['issuer']]}}
alg_values = metadata.get('id_token_signing_alg_values_supported')
if not alg_values:
alg_values = ['RS256']
jwt = JsonWebToken(alg_values)
jwk_set = await self.fetch_jwk_set()
try:
claims = jwt.decode(
token['id_token'],
key=JsonWebKey.import_key_set(jwk_set),
claims_cls=claims_cls,
claims_options=claims_options,
claims_params=claims_params,
)
except ValueError:
jwk_set = await self.fetch_jwk_set(force=True)
claims = jwt.decode(
token['id_token'],
key=JsonWebKey.import_key_set(jwk_set),
claims_cls=claims_cls,
claims_options=claims_options,
claims_params=claims_params,
)
# https://github.com/lepture/authlib/issues/259
if claims.get('nonce_supported') is False:
claims.params['nonce'] = None
claims.validate(leeway=120)
return UserInfo(claims)
def readToken(self, token):
"""Decode self token
:param str token: token to decode
:return: S_OK(dict)/S_ERROR()
"""
result = self.db.getKeySet()
if not result["OK"]:
return result
try:
return S_OK(jwt.decode(token, JsonWebKey.import_key_set(result["Value"].as_dict())))
except Exception as e:
sLog.exception(e)
return S_ERROR(repr(e))
def load_config():
load_dotenv()
config = {
**os.environ,
}
# symmetric key, therefore no need to update or anything
# we use https anyways :)
with open('static/keys.json', 'r') as keys:
config["KEY_SET"] = JsonWebKey.import_key_set(json.loads(keys.read()))
config["OAUTH2_JWT_KEY"] = config["KEY_SET"].keys[0]
config["ADMINS"] = str(config["ADMINS"]).split(",")
return config
def validate_jwks(self):
"""Client's JSON Web Key Set [RFC7517] document value, which contains
the client's public keys. The value of this field MUST be a JSON
object containing a valid JWK Set. These keys can be used by
higher-level protocols that use signing or encryption. This
parameter is intended to be used by clients that cannot use the
"jwks_uri" parameter, such as native clients that cannot host
public URLs. The "jwks_uri" and "jwks" parameters MUST NOT both
be present in the same request or response.
"""
if 'jwks' in self:
if 'jwks_uri' in self:
# The "jwks_uri" and "jwks" parameters MUST NOT both be present
raise InvalidClaimError('jwks')
jwks = self['jwks']
try:
key_set = JsonWebKey.import_key_set(jwks)
if not key_set:
raise InvalidClaimError('jwks')
except ValueError:
raise InvalidClaimError('jwks')
def test_keys():
"""Try to store/get/remove keys"""
# JWS
jws = JsonWebSignature(algorithms=["RS256"])
code_payload = {
"user_id": "user",
"scope": "scope",
"client_id": "client",
"redirect_uri": "redirect_uri",
"code_challenge": "code_challenge",
}
# Token metadata
header = {"alg": "RS256"}
payload = {
"sub": "user",
"iss": "issuer",
"scope": "scope",
"setup": "setup",
"group": "my_group"
}
# Remove all keys
result = db.removeKeys()
assert result["OK"], result["Message"]
# Check active keys
result = db.getActiveKeys()
assert result["OK"], result["Message"]
assert result["Value"] == []
# Create new one
result = db.getPrivateKey()
assert result["OK"], result["Message"]
private_key = result["Value"]
assert isinstance(private_key, RSAKey)
# Sign token
header["kid"] = private_key.thumbprint()
# Find key by KID
result = db.getPrivateKey(header["kid"])
assert result["OK"], result["Message"]
# as_dict has no arguments for authlib < 1.0.0
# for authlib >= 1.0.0:
assert result["Value"].as_dict(True) == private_key.as_dict(True)
# Sign token
token = jwt.encode(header, payload, private_key)
# Sign auth code
code = jws.serialize_compact(header, json_b64encode(code_payload),
private_key)
# Get public key set
result = db.getKeySet()
keyset = result["Value"]
assert result["OK"], result["Message"]
# as_dict has no arguments for authlib < 1.0.0
# for authlib >= 1.0.0:
assert bool([
key for key in keyset.as_dict(True)["keys"]
if key["kid"] == header["kid"]
])
# Read token
_payload = jwt.decode(token, JsonWebKey.import_key_set(keyset.as_dict()))
assert _payload == payload
# Read auth code
data = jws.deserialize_compact(code, keyset.keys[0])
_code_payload = json_loads(urlsafe_b64decode(data["payload"]))
assert _code_payload == code_payload
async def get_jwks(url: str) -> KeySet:
async with httpx.AsyncClient() as client:
resp = await client.get(url)
resp.raise_for_status()
return JsonWebKey.import_key_set(resp.json())
def load_key(header, payload):
jwk_set = JsonWebKey.import_key_set(provider.fetch_jwk_set(force=True))
return jwk_set.find_by_kid(header.get("kid"))
def get_validate_key(self):
with open(get_file_path('jwks_public.json'), 'r') as f:
return JsonWebKey.import_key_set(json.load(f))
def jwks(self):
return JsonWebKey.import_key_set(self.jwks_data())
