change RS256 algorithm

users/views_jwks.py

@@ -0,0 +1,31 @@
+# users/views_jwks.py
+from django.http import JsonResponse, HttpResponseNotFound
+from django.conf import settings
+import base64
+from cryptography.hazmat.primitives import serialization
+from cryptography.hazmat.backends import default_backend
+
+def jwks_view(request):
+    if settings.SIMPLE_JWT["ALGORITHM"] != "RS256":
+        return HttpResponseNotFound("JWKS is only available in RS256 mode")
+
+    public_key = settings.SIMPLE_JWT["VERIFYING_KEY"]
+
+    key = serialization.load_pem_public_key(
+        public_key.encode(), backend=default_backend()
+    )
+    numbers = key.public_numbers()
+
+    e = numbers.e.to_bytes((numbers.e.bit_length() + 7) // 8, "big")
+    n = numbers.n.to_bytes((numbers.n.bit_length() + 7) // 8, "big")
+
+    jwk = {
+        "kty": "RSA",
+        "use": "sig",
+        "alg": "RS256",
+        "kid": "msa-user-key",
+        "n": base64.urlsafe_b64encode(n).decode().rstrip("="),
+        "e": base64.urlsafe_b64encode(e).decode().rstrip("="),
+    }
+
+    return JsonResponse({"keys": [jwk]})