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from unittest import TestCase
from joserfc import jws
from joserfc.jwk import RSAKey, OctKey
from joserfc.registry import HeaderParameter
from joserfc.errors import (
BadSignatureError,
MissingKeyError,
UnsupportedAlgorithmError,
UnsupportedKeyUseError,
UnsupportedKeyAlgorithmError,
UnsupportedKeyOperationError,
InvalidKeyTypeError,
InvalidKeyCurveError,
MissingHeaderError,
MissingCritHeaderError,
UnsupportedHeaderError,
InvalidHeaderValueError,
)
from joserfc.util import urlsafe_b64encode
from tests.base import load_key
class TestJWSErrors(TestCase):
key = OctKey.import_key("secret")
def test_without_alg(self):
self.assertRaises(MissingHeaderError, jws.serialize_compact, {"kid": "123"}, "i", self.key)
def test_raise_unsupported_algorithm_error(self):
registry = jws.JWSRegistry(algorithms=["HS256", "HS384", "HS512"])
header = {"alg": "HS256"}
jws.serialize_compact(header, "i", self.key, registry=registry)
# raise error
registry = jws.JWSRegistry(algorithms=["HS512"])
self.assertRaises(UnsupportedAlgorithmError, jws.serialize_compact, header, "i", self.key, registry=registry)
def test_without_key(self):
self.assertRaises(MissingKeyError, jws.serialize_compact, {"alg": "HS256"}, "i", None)
header = {"alg": "HS256"}
text = jws.serialize_compact(header, "i", self.key)
self.assertRaises(MissingKeyError, jws.deserialize_compact, text, None)
def test_none_alg(self):
header = {"alg": "none"}
text = jws.serialize_compact(header, "i", None, algorithms=["none"])
obj = jws.deserialize_compact(text, None, algorithms=["none"])
self.assertEqual(obj.payload, b"i")
# none alg has no signature
text += "aQ"
self.assertRaises(BadSignatureError, jws.deserialize_compact, text, None, algorithms=["none"])
def test_header_invalid_type(self):
# kid should be a string
header = {"alg": "HS256", "kid": 123}
self.assertRaises(
InvalidHeaderValueError,
jws.serialize_compact,
header,
"i",
self.key,
)
# jwk should be a dict
header = {"alg": "HS256", "jwk": "dict"}
self.assertRaises(
InvalidHeaderValueError,
jws.serialize_compact,
header,
"i",
self.key,
)
# jku should be a URL
header = {"alg": "HS256", "jku": "url"}
self.assertRaises(
InvalidHeaderValueError,
jws.serialize_compact,
header,
"i",
self.key,
)
# x5c should be a chain of string
header = {"alg": "HS256", "x5c": "url"}
self.assertRaises(
InvalidHeaderValueError,
jws.serialize_compact,
header,
"i",
self.key,
)
header = {"alg": "HS256", "x5c": [1, 2]}
self.assertRaises(
InvalidHeaderValueError,
jws.serialize_compact,
header,
"i",
self.key,
)
def test_crit_header(self):
header = {"alg": "HS256", "crit": ["kid"]}
# missing kid header
self.assertRaises(
MissingCritHeaderError,
jws.serialize_compact,
header,
"i",
self.key,
)
header = {"alg": "HS256", "kid": "1", "crit": ["kid"]}
jws.serialize_compact(header, "i", self.key)
def test_unsupported_crit_header(self):
header = {"alg": "HS256", "bob": "a", "crit": ["bob"]}
self.assertRaises(
UnsupportedHeaderError,
jws.serialize_compact,
header,
"i",
self.key,
)
registry = jws.JWSRegistry(
header_registry={
"bob": HeaderParameter("Bob", "str"),
}
)
# allow with custom header registry
jws.serialize_compact(header, "i", self.key, registry=registry)
def test_extra_header(self):
header = {"alg": "HS256", "extra": "hi"}
self.assertRaises(
UnsupportedHeaderError,
jws.serialize_compact,
header,
"i",
self.key,
)
# bypass extra header
registry = jws.JWSRegistry(strict_check_header=False)
jws.serialize_compact(header, "i", self.key, registry=registry)
# or use a header registry
extra_header = {"extra": HeaderParameter("Extra header", "str", False)}
registry = jws.JWSRegistry(header_registry=extra_header)
jws.serialize_compact(header, "i", self.key, registry=registry)
def test_rsa_invalid_signature(self):
key1 = RSAKey.generate_key()
key2 = RSAKey.generate_key()
header = {"alg": "RS256"}
text = jws.serialize_compact(header, "i", key1)
self.assertRaises(BadSignatureError, jws.deserialize_compact, text, key2)
header = {"alg": "PS256"}
text = jws.serialize_compact(header, "i", key1, algorithms=["PS256"])
self.assertRaises(BadSignatureError, jws.deserialize_compact, text, key2, algorithms=["PS256"])
def test_ec_incorrect_curve(self):
header = {"alg": "ES256"}
key = load_key("ec-p512-private.pem")
self.assertRaises(InvalidKeyCurveError, jws.serialize_compact, header, "i", key)
def test_ec_invalid_signature(self):
header = {"alg": "ES256"}
key1 = load_key("ec-p256-alice.json")
key2 = load_key("ec-p256-bob.json")
text = jws.serialize_compact(header, "i", key1)
self.assertRaises(BadSignatureError, jws.deserialize_compact, text, key2)
parts = text.split(".")
bad_text = ".".join(parts[:-1]) + "." + urlsafe_b64encode(b"abc").decode("utf-8")
self.assertRaises(BadSignatureError, jws.deserialize_compact, bad_text, key1)
def test_okp_bad_signature(self):
header = {"alg": "EdDSA"}
key1 = load_key("okp-ed448-private.pem")
key2 = load_key("okp-ed25519-private.json")
algorithms = ["EdDSA"]
value = jws.serialize_json({"protected": header}, "i", key1, algorithms=algorithms)
self.assertRaises(
BadSignatureError,
jws.deserialize_json,
value,
key2,
algorithms=algorithms,
)
class TestJWSWithKeyErrors(TestCase):
def test_invalid_key_use(self):
key = OctKey.generate_key(parameters={"use": "enc"})
header = {"alg": "HS256"}
self.assertRaises(UnsupportedKeyUseError, jws.serialize_compact, header, "i", key)
def test_invalid_key_alg(self):
key = OctKey.generate_key(parameters={"alg": "HS512"})
header = {"alg": "HS256"}
self.assertRaises(UnsupportedKeyAlgorithmError, jws.serialize_compact, header, "i", key)
def test_invalid_key_ops(self):
key = OctKey.generate_key(parameters={"key_ops": ["verify"]})
header = {"alg": "HS256"}
self.assertRaises(UnsupportedKeyOperationError, jws.serialize_compact, header, "i", key)
def test_invalid_key_type(self):
key = OctKey.generate_key()
header = {"alg": "RS256"}
self.assertRaises(InvalidKeyTypeError, jws.serialize_compact, header, "i", key)
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