providers/oauth2: more x5c and ecdsa x/y tests (#4463)
* add option to exclude x5* Signed-off-by: Jens Langhammer <jens@goauthentik.io> #4082 * cleanup jwks, add flaky test Signed-off-by: Jens Langhammer <jens@goauthentik.io> * add workaround based on https://github.com/jpadilla/pyjwt/issues/709 Signed-off-by: Jens Langhammer <jens@goauthentik.io> * don't rstrip hashes Signed-off-by: Jens Langhammer <jens@goauthentik.io> * keycloak seems to strip equals Signed-off-by: Jens Langhammer <jens@goauthentik.io> Signed-off-by: Jens Langhammer <jens@goauthentik.io>
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Jens L
GitHub
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f09305a444
commit
e390f5b2d1
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"""JWKS tests"""
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import base64
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import json
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from cryptography.hazmat.backends import default_backend
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from cryptography.x509 import load_der_x509_certificate
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from django.urls.base import reverse
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from jwt import PyJWKSet
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from authentik.core.models import Application
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from authentik.core.tests.utils import create_test_cert, create_test_flow
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from authentik.crypto.models import CertificateKeyPair
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from authentik.lib.generators import generate_id
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from authentik.providers.oauth2.models import OAuth2Provider
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from authentik.providers.oauth2.tests.utils import OAuthTestCase
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TEST_CORDS_CERT = """
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-----BEGIN CERTIFICATE-----
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MIIB6jCCAZCgAwIBAgIRAOsdE3N7zETzs+7shTXGj5wwCgYIKoZIzj0EAwIwHjEc
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MBoGA1UEAwwTYXV0aGVudGlrIDIwMjIuMTIuMjAeFw0yMzAxMTYyMjU2MjVaFw0y
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NDAxMTIyMjU2MjVaMHgxTDBKBgNVBAMMQ0NsbDR2TzFJSGxvdFFhTGwwMHpES2tM
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WENYdzRPUFF2eEtZN1NrczAuc2VsZi1zaWduZWQuZ29hdXRoZW50aWsuaW8xEjAQ
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BgNVBAoMCWF1dGhlbnRpazEUMBIGA1UECwwLU2VsZi1zaWduZWQwWTATBgcqhkjO
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PQIBBggqhkjOPQMBBwNCAAQAwOGam7AKOi5LKmb9lK1rAzA2JTppqrFiIaUdjqmH
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ZICJP00Wt0dfqOtEjgMEv1Hhu1DmKZn2ehvpxwPSzBr5o1UwUzBRBgNVHREBAf8E
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RzBFgkNCNkw4YlI0UldJRU42NUZLamdUTzV1YmRvNUZWdkpNS2lxdjFZeTRULnNl
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bGYtc2lnbmVkLmdvYXV0aGVudGlrLmlvMAoGCCqGSM49BAMCA0gAMEUCIC/JAfnl
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uC30ihqepbiMCaTaPMbL8Ka2Lk92IYfMhf46AiEAz9Kmv6HF2D4MK54iwhz2WqvF
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8vo+OiGdTQ1Qoj7fgYU=
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-----END CERTIFICATE-----
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"""
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TEST_CORDS_KEY = """
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-----BEGIN EC PRIVATE KEY-----
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MHcCAQEEIKy6mPLJc5v71InMMvYaxyXI3xXpwQTPLyAYWVFnZHVioAoGCCqGSM49
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AwEHoUQDQgAEAMDhmpuwCjouSypm/ZStawMwNiU6aaqxYiGlHY6ph2SAiT9NFrdH
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X6jrRI4DBL9R4btQ5imZ9nob6ccD0swa+Q==
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-----END EC PRIVATE KEY-----
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"""
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class TestJWKS(OAuthTestCase):
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"""Test JWKS view"""
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@ -29,6 +57,8 @@ class TestJWKS(OAuthTestCase):
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body = json.loads(response.content.decode())
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self.assertEqual(len(body["keys"]), 1)
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PyJWKSet.from_dict(body)
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key = body["keys"][0]
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load_der_x509_certificate(base64.b64decode(key["x5c"][0]), default_backend()).public_key()
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def test_hs256(self):
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"""Test JWKS request with HS256"""
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@ -60,3 +90,25 @@ class TestJWKS(OAuthTestCase):
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body = json.loads(response.content.decode())
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self.assertEqual(len(body["keys"]), 1)
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PyJWKSet.from_dict(body)
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def test_ecdsa_coords_mismatched(self):
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"""Test JWKS request with ES256"""
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cert = CertificateKeyPair.objects.create(
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name=generate_id(),
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key_data=TEST_CORDS_KEY,
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certificate_data=TEST_CORDS_CERT,
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)
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provider = OAuth2Provider.objects.create(
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name="test",
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client_id="test",
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authorization_flow=create_test_flow(),
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redirect_uris="http://local.invalid",
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signing_key=cert,
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)
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app = Application.objects.create(name="test", slug="test", provider=provider)
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response = self.client.get(
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reverse("authentik_providers_oauth2:jwks", kwargs={"application_slug": app.slug})
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)
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body = json.loads(response.content.decode())
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self.assertEqual(len(body["keys"]), 1)
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PyJWKSet.from_dict(body)
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@ -15,27 +15,49 @@ from cryptography.hazmat.primitives.serialization import Encoding
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from django.http import HttpRequest, HttpResponse, JsonResponse
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from django.shortcuts import get_object_or_404
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from django.views import View
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from jwt.utils import base64url_encode
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from authentik.core.models import Application
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from authentik.crypto.models import CertificateKeyPair
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from authentik.providers.oauth2.models import JWTAlgorithms, OAuth2Provider
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def b64_enc(number: int) -> str:
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"""Convert number to base64-encoded octet-value"""
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length = ((number).bit_length() + 7) // 8
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number_bytes = number.to_bytes(length, "big")
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final = urlsafe_b64encode(number_bytes).rstrip(b"=")
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return final.decode("ascii")
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# See https://notes.salrahman.com/generate-es256-es384-es512-private-keys/
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# and _CURVE_TYPES in the same file as the below curve files
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ec_crv_map = {
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SECP256R1: "P-256",
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SECP384R1: "P-384",
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SECP521R1: "P-512",
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SECP521R1: "P-521",
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}
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min_length_map = {
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SECP256R1: 32,
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SECP384R1: 48,
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SECP521R1: 66,
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}
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# https://github.com/jpadilla/pyjwt/issues/709
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def bytes_from_int(val: int, min_length: int = 0) -> bytes:
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"""Custom bytes_from_int that accepts a minimum length"""
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remaining = val
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byte_length = 0
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while remaining != 0:
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remaining >>= 8
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byte_length += 1
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length = max([byte_length, min_length])
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return val.to_bytes(length, "big", signed=False)
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def to_base64url_uint(val: int, min_length: int = 0) -> bytes:
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"""Custom to_base64url_uint that accepts a minimum length"""
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if val < 0:
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raise ValueError("Must be a positive integer")
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int_bytes = bytes_from_int(val, min_length)
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if len(int_bytes) == 0:
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int_bytes = b"\x00"
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return base64url_encode(int_bytes)
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class JWKSView(View):
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@ -55,34 +77,33 @@ class JWKSView(View):
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"kty": "RSA",
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"alg": JWTAlgorithms.RS256,
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"use": "sig",
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"n": b64_enc(public_numbers.n),
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"e": b64_enc(public_numbers.e),
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"n": to_base64url_uint(public_numbers.n).decode(),
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"e": to_base64url_uint(public_numbers.e).decode(),
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}
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elif isinstance(private_key, EllipticCurvePrivateKey):
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public_key: EllipticCurvePublicKey = private_key.public_key()
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public_numbers = public_key.public_numbers()
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curve_type = type(public_key.curve)
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key_data = {
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"kid": key.kid,
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"kty": "EC",
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"alg": JWTAlgorithms.ES256,
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"use": "sig",
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"x": b64_enc(public_numbers.x),
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"y": b64_enc(public_numbers.y),
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"crv": ec_crv_map.get(type(public_key.curve), public_key.curve.name),
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"x": to_base64url_uint(public_numbers.x, min_length_map[curve_type]).decode(),
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"y": to_base64url_uint(public_numbers.y, min_length_map[curve_type]).decode(),
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"crv": ec_crv_map.get(curve_type, public_key.curve.name),
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}
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else:
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return key_data
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key_data["x5c"] = [b64encode(key.certificate.public_bytes(Encoding.DER)).decode("utf-8")]
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key_data["x5t"] = (
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urlsafe_b64encode(key.certificate.fingerprint(hashes.SHA1())) # nosec
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.decode("utf-8")
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.rstrip("=")
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)
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key_data["x5t#S256"] = (
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urlsafe_b64encode(key.certificate.fingerprint(hashes.SHA256()))
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.decode("utf-8")
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.rstrip("=")
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)
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key_data["x5t"] = urlsafe_b64encode(
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key.certificate.fingerprint(hashes.SHA1())
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).decode( # nosec
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"utf-8"
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).rstrip("=")
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key_data["x5t#S256"] = urlsafe_b64encode(
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key.certificate.fingerprint(hashes.SHA256())
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).decode("utf-8").rstrip("=")
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return key_data
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def get(self, request: HttpRequest, application_slug: str) -> HttpResponse:
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@ -52,7 +52,7 @@ import TabItem from "@theme/TabItem";
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OPENID_AUTHORIZATION_ENDPOINT: https://authentik.company/application/o/authorize/
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OPENID_CLIENT_ID: # client ID from above
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OPENID_ISSUER: https://authentik.company/application/o/*Slug of the application from above*/
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OPENID_JWKS_ENDPOINT: https://authentik.company/application/o/*Slug of the application from above*/jwks/
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OPENID_JWKS_ENDPOINT: https://authentik.company/application/o/*Slug of the application from above*/jwks/?exclude_x5
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OPENID_REDIRECT_URI: https://guacamole.company/ # This must match the redirect URI above
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```
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@ -64,7 +64,7 @@ OPENID_REDIRECT_URI: https://guacamole.company/ # This must match the redirect U
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openid-authorization-endpoint=https://authentik.company/application/o/authorize/
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openid-client-id=# client ID from above
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openid-issuer=https://authentik.company/application/o/*Slug of the application from above*/
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openid-jwks-endpoint=https://authentik.company/application/o/*Slug of the application from above*/jwks/
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openid-jwks-endpoint=https://authentik.company/application/o/*Slug of the application from above*/jwks/?exclude_x5
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openid-redirect-uri=https://guacamole.company/ # This must match the redirect URI above
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```
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