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from unittest import TestCase
from joserfc.jws import (
HeaderDict,
FlattenedJSONSerialization,
GeneralJSONSerialization,
JWSRegistry,
serialize_json,
deserialize_json,
detach_content,
)
from joserfc.jwk import RSAKey, OctKey, KeySet
from joserfc.errors import (
DecodeError,
BadSignatureError,
UnsupportedHeaderError,
UnsupportedAlgorithmError,
ExceededSizeError,
)
from joserfc.util import json_b64encode, urlsafe_b64encode, to_str
from tests.base import load_key
class TestJSON(TestCase):
key = OctKey.import_key("secret")
def test_serialize_json(self):
key: RSAKey = load_key("rsa-openssl-private.pem")
member: HeaderDict = {"protected": {"alg": "RS256"}}
# flattened
value = serialize_json(member, b"hello", key)
self.assertIn("signature", value)
self.assertNotIn("signatures", value)
obj = deserialize_json(value, key)
self.assertEqual(obj.payload, b"hello")
self.assertEqual(obj.headers(), {"alg": "RS256"})
# general
value = serialize_json([member], b"hello", key)
self.assertNotIn("signature", value)
self.assertIn("signatures", value)
obj = deserialize_json(value, key)
self.assertEqual(obj.payload, b"hello")
def test_serialize_with_unprotected_header(self):
key: RSAKey = load_key("rsa-openssl-private.pem")
member: HeaderDict = {"protected": {"alg": "RS256"}, "header": {"kid": "alice"}}
value = serialize_json(member, b"hello", key)
self.assertIn("header", value)
self.assertEqual(value["header"], member["header"])
value = serialize_json([member], b"hello", key)
self.assertIn("signatures", value)
value = value["signatures"][0]
self.assertIn("header", value)
self.assertEqual(value["header"], member["header"])
def test_use_key_set(self):
key1 = load_key("ec-p256-alice.json", {"kid": "alice"})
key2 = load_key("ec-p256-bob.json", {"kid": "bob"})
keys = KeySet([key1, key2])
member: HeaderDict = {"protected": {"alg": "ES256"}}
value = serialize_json(member, b"hello", keys)
self.assertIn("header", value)
self.assertIn("kid", value["header"])
# this will always pick alice key
member = {"protected": {"alg": "ES256"}, "header": {"kid": "alice"}}
value = serialize_json(member, b"hello", keys)
self.assertEqual(value["header"], {"kid": "alice"})
# header can also be an empty value
member = {"protected": {"alg": "ES256"}, "header": {}}
value = serialize_json(member, b"hello", keys)
self.assertIn("kid", value["header"])
def test_detach_content(self):
member: HeaderDict = {"protected": {"alg": "ES256"}}
key = load_key("ec-p256-alice.json")
value = serialize_json(member, b"hello", key)
self.assertIn("payload", value)
new_value = detach_content(value)
self.assertNotIn("payload", new_value)
# detach again will not raise error
detach_content(new_value)
def test_invalid_payload(self):
member: HeaderDict = {"protected": {"alg": "ES256"}}
key = load_key("ec-p256-alice.json")
value = serialize_json(member, b"hello", key)
value["payload"] = "a"
self.assertRaises(DecodeError, deserialize_json, value, key)
value = serialize_json([member], b"hello", key)
value["payload"] = "a"
self.assertRaises(DecodeError, deserialize_json, value, key)
def test_bad_signature(self):
member: HeaderDict = {"protected": {"alg": "ES256"}}
key1 = load_key("ec-p256-alice.json")
key2 = load_key("ec-p256-bob.json")
value = serialize_json(member, b"hello", key1)
self.assertRaises(BadSignatureError, deserialize_json, value, key2)
value = serialize_json([member], b"hello", key1)
self.assertRaises(BadSignatureError, deserialize_json, value, key2)
def test_with_public_header(self):
key: RSAKey = load_key("rsa-openssl-private.pem")
member: HeaderDict = {"header": {"alg": "RS256", "kid": "abc"}}
value = serialize_json(member, b"hello", key)
self.assertIn("header", value)
obj = deserialize_json(value, key)
self.assertEqual(obj.payload, b"hello")
self.assertEqual(obj.headers(), {"alg": "RS256", "kid": "abc"})
def test_strict_check_header(self):
member: HeaderDict = {"protected": {"alg": "HS256", "custom": "hi"}}
self.assertRaises(UnsupportedHeaderError, serialize_json, member, b"hi", self.key)
registry = JWSRegistry(strict_check_header=False)
serialize_json(member, b"hi", self.key, registry=registry)
def test_unsupported_algorithm(self):
member: HeaderDict = {"protected": {"alg": "HS256"}}
value = serialize_json(member, b"hi", self.key)
registry = JWSRegistry(algorithms=["HS512"])
self.assertRaises(UnsupportedAlgorithmError, deserialize_json, value, self.key, registry=registry)
def test_prevent_overwrite_header(self):
member: HeaderDict = {"protected": {"alg": "HS256", "kid": "a"}}
value = serialize_json(member, b"hello", self.key)
value["header"] = {"kid": "b"}
obj = deserialize_json(value, self.key)
self.assertEqual(obj.headers()["kid"], "a")
def test_header_exceeded_size_error(self):
data: FlattenedJSONSerialization = {
"protected": to_str(json_b64encode({f"a{i}": "a" * i for i in range(100)})),
"payload": to_str(json_b64encode({"a": "a"})),
"signature": to_str(urlsafe_b64encode(b"o")),
}
self.assertRaises(ExceededSizeError, deserialize_json, data, self.key)
data: GeneralJSONSerialization = {
"payload": to_str(json_b64encode({"a": "a"})),
"signatures": [
{
"protected": to_str(json_b64encode({f"a{i}": "a" * i for i in range(100)})),
"signature": to_str(urlsafe_b64encode(b"o")),
}
],
}
self.assertRaises(ExceededSizeError, deserialize_json, data, self.key)
def test_payload_exceeded_size_error(self):
data: FlattenedJSONSerialization = {
"protected": to_str(json_b64encode({"alg": "HS256"})),
"payload": to_str(json_b64encode({f"a{i}": "a" * i for i in range(1000)})),
"signature": to_str(urlsafe_b64encode(b"o")),
}
self.assertRaises(ExceededSizeError, deserialize_json, data, self.key)
data: GeneralJSONSerialization = {
"payload": to_str(json_b64encode({f"a{i}": "a" * i for i in range(1000)})),
"signatures": [
{
"protected": to_str(json_b64encode({"alg": "HS256"})),
"signature": to_str(urlsafe_b64encode(b"o")),
}
],
}
self.assertRaises(ExceededSizeError, deserialize_json, data, self.key)
def test_signature_exceeded_size_error(self):
data: FlattenedJSONSerialization = {
"protected": to_str(json_b64encode({"alg": "HS256"})),
"payload": to_str(json_b64encode({"a": "a"})),
"signature": to_str(urlsafe_b64encode(("o" * 1000).encode("utf-8"))),
}
self.assertRaises(ExceededSizeError, deserialize_json, data, self.key)
data: GeneralJSONSerialization = {
"payload": to_str(json_b64encode({"a": "a"})),
"signatures": [
{
"protected": to_str(json_b64encode({"alg": "HS256"})),
"signature": to_str(urlsafe_b64encode(("o" * 1000).encode("utf-8"))),
}
],
}
self.assertRaises(ExceededSizeError, deserialize_json, data, self.key)
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