chore: Removed unused dependency

lms/djangoapps/courseware/tests/test_jwt.py

@@ -9,9 +9,6 @@ from jwkest.jws import JWS
 
 from lms.djangoapps.courseware.jwt import _encode_and_sign, create_jwt, unpack_jwt
 
-import unittest
-from unittest.mock import patch
-
 
 test_user_id = 121
 invalid_test_user_id = 120
@@ -28,6 +25,10 @@ expected_full_token = {
 
 
 class TestSign(unittest.TestCase):
+    """
+    Tests for JWT creation and signing.
+    """
+
     def test_create_jwt(self):
         token = create_jwt(test_user_id, test_timeout, {}, test_now)
 
@@ -53,6 +54,7 @@ class TestSign(unittest.TestCase):
         with self.assertRaises(BadSignature):
             _verify_jwt(token)
 
+
 def _verify_jwt(jwt_token):
     """
     Helper function which verifies the signature and decodes the token
@@ -65,6 +67,10 @@ def _verify_jwt(jwt_token):
 
 
 class TestUnpack(unittest.TestCase):
+    """
+    Tests for JWT unpacking.
+    """
+
     def test_unpack_jwt(self):
         token = create_jwt(test_user_id, test_timeout, {}, test_now)
         decoded = unpack_jwt(token, test_user_id, test_now)

lms/djangoapps/courseware/utils.py

@@ -234,36 +234,3 @@ def _use_new_financial_assistance_flow(course_id):
     ):
         return True
     return False
-
-
-
-def unpack_jwt(token, lms_user_id, now=None):
-    """
-    Unpack and verify an encoded JWT.
-
-    Validate the user and expiration.
-
-    Arguments:
-        token (string): The token to be unpacked and verified.
-        lms_user_id (int): LMS user ID this token should match with.
-        now (int): Optional now value for testing.
-
-    Returns a valid, decoded json payload (string).
-    """
-    now = now or int(time())
-
-    # Unpack and verify token
-    keys = jwk.KEYS()
-    keys.load_jwks(settings.TOKEN_SIGNING['JWT_PUBLIC_SIGNING_JWK_SET'])
-    payload = JWS().verify_compact(token.encode('utf-8'), keys)
-
-    if "lms_user_id" not in payload:
-        raise MissingKey("LMS user id is missing")
-    if "exp" not in payload:
-        raise MissingKey("Expiration is missing")
-    if payload["lms_user_id"] != lms_user_id:
-        raise Invalid("User does not match")
-    if payload["exp"] < now:
-        raise Expired("Token is expired")
-
-    return payload

lms/djangoapps/courseware/views/views.py

@@ -91,6 +91,7 @@ from lms.djangoapps.courseware.courses import (
 )
 from lms.djangoapps.courseware.date_summary import verified_upgrade_deadline_link
 from lms.djangoapps.courseware.exceptions import CourseAccessRedirect, Redirect
+from lms.djangoapps.courseware.jwt import unpack_jwt
 from lms.djangoapps.courseware.masquerade import is_masquerading_as_specific_student, setup_masquerade
 from lms.djangoapps.courseware.model_data import FieldDataCache
 from lms.djangoapps.courseware.models import BaseStudentModuleHistory, StudentModule
@@ -105,7 +106,7 @@ from lms.djangoapps.courseware.user_state_client import DjangoXBlockUserStateCli
 from lms.djangoapps.courseware.utils import (
     _use_new_financial_assistance_flow,
     create_financial_assistance_application,
-    is_eligible_for_financial_aid, unpack_jwt
+    is_eligible_for_financial_aid
 )
 from lms.djangoapps.edxnotes.helpers import is_feature_enabled
 from lms.djangoapps.experiments.utils import get_experiment_user_metadata_context