Add test for SubjectAccessReview authorization

Signed-off-by: averevki <[email protected]>

Author: averevki

testsuite/kuadrant/policy/authorization/sections.py

@@ -287,7 +287,7 @@ def add_external_opa_policy(self, name, endpoint, ttl=0, **common_features):
         self.add_item(name, {"opa": {"externalPolicy": {"url": endpoint, "ttl": ttl}}}, **common_features)
 
     @modify
-    def add_kubernetes(self, name: str, user: ABCValue, resource_attributes: dict, **common_features):
+    def add_kubernetes(self, name: str, user: ABCValue, resource_attributes: dict = None, **common_features):
         """Adds Kubernetes authorization
 
         :param name: name of kubernetes authorization

testsuite/tests/singlecluster/authorino/identity/conftest.py

@@ -2,6 +2,21 @@
 
 import pytest
 
+from testsuite.kubernetes.service_account import ServiceAccount
+
+
+@pytest.fixture(scope="module")
+def create_service_account(request, cluster, blame, module_label):
+    """Creates and returns service account"""
+
+    def _create_service_account(name):
+        service_account = ServiceAccount.create_instance(cluster, blame(name), labels={"app": module_label})
+        request.addfinalizer(service_account.delete)
+        service_account.commit()
+        return service_account
+
+    return _create_service_account
+
 
 @pytest.fixture(scope="module")
 def authorization(authorization):

testsuite/tests/singlecluster/authorino/identity/subject_access_review/__init__.py

@@ -0,0 +1,74 @@
+"""Conftest for SubjectAccessReview related tests."""
+
+import pytest
+
+from testsuite.httpx.auth import HeaderApiKeyAuth
+from testsuite.kuadrant.policy.authorization import ValueFrom
+from testsuite.kubernetes.cluster_role import ClusterRole, ClusterRoleBinding
+
+
+@pytest.fixture(scope="module")
+def audience(hostname):
+    """Return hostname as only audience for the service account bound token"""
+    return [hostname.hostname]
+
+
+@pytest.fixture(scope="module")
+def authorization(authorization):
+    """Add kubernetes token-review and subject-access-review identity"""
+    authorization.identity.add_kubernetes("token-review-host")
+    user = ValueFrom("auth.identity.user.username")
+    authorization.authorization.add_kubernetes("subject-access-review-host", user)
+    return authorization
+
+
+@pytest.fixture(scope="module")
+def create_cluster_role_binding(request, cluster, blame, module_label):
+    """Creates and returns a ClusterRoleBinding"""
+
+    def _create_cluster_role_binding(cluster_role, service_accounts):
+        cluster_role_binding = ClusterRoleBinding.create_instance(
+            cluster, blame("crb"), cluster_role, service_accounts, labels={"app": module_label}
+        )
+        request.addfinalizer(cluster_role_binding.delete)
+        cluster_role_binding.commit()
+        return cluster_role_binding
+
+    return _create_cluster_role_binding
+
+
+@pytest.fixture(scope="module")
+def cluster_role(request, cluster, blame, module_label):
+    """Creates and returns a ClusterRole"""
+    rules = [{"nonResourceURLs": ["/get"], "verbs": ["get"]}]
+    cluster_role = ClusterRole.create_instance(cluster, blame("cr"), rules, labels={"app": module_label})
+    request.addfinalizer(cluster_role.delete)
+    cluster_role.commit()
+    return cluster_role
+
+
+@pytest.fixture(scope="module")
+def bound_service_account_token(cluster_role, create_service_account, create_cluster_role_binding, audience):
+    """Create a ServiceAccount, bind it to a ClusterRole and return its token with a given audience"""
+    service_account = create_service_account("tkn-auth")
+    create_cluster_role_binding(cluster_role.model.metadata.name, [service_account.model.metadata.name])
+    return service_account.get_auth_token(audience)
+
+
+@pytest.fixture(scope="module")
+def auth(bound_service_account_token):
+    """Create request auth with service account token as API key"""
+    return HeaderApiKeyAuth(bound_service_account_token, "Bearer")
+
+
+@pytest.fixture(scope="module")
+def service_account_token(create_service_account, audience):
+    """Create a non-authorized service account and request its bound token with the hostname as audience"""
+    service_account = create_service_account("tkn-non-auth")
+    return service_account.get_auth_token(audience)
+
+
+@pytest.fixture(scope="module")
+def auth2(service_account_token):
+    """Create request auth with service account token as API key"""
+    return HeaderApiKeyAuth(service_account_token, "Bearer")

testsuite/tests/singlecluster/authorino/identity/subject_access_review/conftest.py

@@ -0,0 +1,16 @@
+"""Test kubernetes SubjectAccessReview authorization by verifying only a
+ ServiceAccount bound to a ClusterRole is authorized to access a resource"""
+
+import pytest
+
+pytestmark = [pytest.mark.authorino]
+
+
+def test_host_audience(client, auth, auth2):
+    """Test Kubernetes SubjectAccessReview functionality by setting up authentication and authorization for an endpoint
+    and querying it with authorized and non-authorized ServiceAccount."""
+    response = client.get("/get", auth=auth)
+    assert response.status_code == 200
+
+    response = client.get("/get", auth=auth2)
+    assert response.status_code == 403

testsuite/tests/singlecluster/authorino/identity/subject_access_review/test_subject_access_review.py

@@ -3,20 +3,6 @@
 import pytest
 
 from testsuite.httpx.auth import HeaderApiKeyAuth
-from testsuite.kubernetes.service_account import ServiceAccount
-
-
-@pytest.fixture(scope="module")
-def create_service_account(request, cluster, blame, module_label):
-    """Creates and returns service account"""
-
-    def _create_service_account(name):
-        service_account = ServiceAccount.create_instance(cluster, blame(name), labels={"app": module_label})
-        request.addfinalizer(service_account.delete)
-        service_account.commit()
-        return service_account
-
-    return _create_service_account
 
 
 @pytest.fixture(scope="module")