added jit for refresh token, refresh access token endpoint

common/generators.py

@@ -0,0 +1,8 @@
+import string
+import secrets
+
+
+def generate_charset(length: int):
+    return "".join(
+        secrets.choice(string.digits + string.ascii_letters) for _ in range(length)
+    )

game/api/v1/serializers.py

@@ -1,7 +1,8 @@
 from rest_framework import serializers
 from rest_framework.exceptions import ValidationError
 
-from game.models import Hero, Player, HeroInDeck, Deck
+from game.models import Hero, Player, HeroInDeck, Deck, PlayerAuthSession
+from game.services.jwt import read_jwt
 
 
 class CreateHeroSerializer(serializers.ModelSerializer):
@@ -113,3 +114,29 @@ class GetDeckSerializer(serializers.ModelSerializer):
     class Meta:
         model = Deck
         fields = ("player", "heroes")
+
+
+class ObtainTokenPairSerializer(serializers.Serializer):
+    refresh_token = serializers.CharField(max_length=300)
+
+    def __init__(self, instance=None, data=None, **kwargs):
+        super().__init__(instance, data, **kwargs)
+        self.player_id = None
+
+    def validate_refresh_token(self, value):
+        payload = read_jwt(value)
+        if not payload:
+            raise ValidationError("Token is incorrect or expired")
+
+        if "jit" not in payload:
+            raise ValidationError("Token is incorrect")
+
+        jit = payload["jit"]
+
+        try:
+            session = PlayerAuthSession.objects.get(jit=jit)
+        except PlayerAuthSession.DoesNotExist:
+            return ValidationError("Incorrect user session")
+
+        self.player_id = session.player.id
+        return value

game/api/v1/views.py

@@ -19,6 +19,7 @@ from game.api.v1.serializers import (
     ListHeroSerializer,
     CreateDeckSerializer,
     GetDeckSerializer,
+    ObtainTokenPairSerializer,
 )
 from game.services.jwt import sign_jwt
 
@@ -75,9 +76,8 @@ class PlayerCreateView(GenericAPIView, CreateModelMixin):
         serializer.is_valid(raise_exception=True)
         instance = self.perform_create(serializer)
 
-        # TODO: add JTI to refresh token
         access_jwt = sign_jwt({"id": instance.id, "type": "access"}, t_life=3600)
-        refresh_jwt = sign_jwt({"id": instance.id, "type": "refresh"})
+        refresh_jwt = sign_jwt({"jit": instance.get_auth_session(), "type": "refresh"})
         return Response(
             {
                 "access_token": access_jwt,
@@ -151,3 +151,13 @@ class RetireUpdateDeleteDeckView(
                 "id", flat=True
             )
         )
+
+
+class RefreshAuthKey(GenericAPIView):
+    serializer_class = ObtainTokenPairSerializer
+
+    def post(self, request, *args, **kwargs):
+        serializer = self.get_serializer(data=request.data)
+        serializer.is_valid(raise_exception=True)
+        access_jwt = sign_jwt({"id": serializer.player_id, "type": "access"}, t_life=3600)
+        return Response({"access_token": access_jwt}, status=status.HTTP_200_OK)

game/authentication.py

@@ -1,3 +1,4 @@
+from jwt import DecodeError
 from rest_framework import authentication
 from rest_framework import exceptions
 from .models import Player
@@ -12,13 +13,20 @@ class PlayerAuthentication(authentication.BaseAuthentication):
         ):
             raise exceptions.AuthenticationFailed("No credentials provided.")
 
-        t = read_jwt(token)
+        try:
+            t = read_jwt(token)
+        except DecodeError:
+            raise exceptions.AuthenticationFailed("Token is incorrect")
+
         if not t:
             raise exceptions.AuthenticationFailed("Token is incorrect of expired")
 
-        if "id" not in t:
+        if "id" not in t and "type" not in t:
             raise exceptions.AuthenticationFailed("No user data")
 
+        if t["type"] != "access":
+            raise exceptions.AuthenticationFailed("Incorrect token type")
+
         try:
             user = Player.objects.get(id=int(t["id"]))
         except Player.DoesNotExist:

game/models.py

@@ -11,6 +11,8 @@ from django.core.validators import (
 from django.db import models
 from django.conf import settings
 
+from common.generators import generate_charset
+
 HER0_TYPES = [("WIZARD", "wizard"), ("ARCHER", "archer"), ("WARRIOR", "warrior")]
 
 
@@ -31,6 +33,7 @@ class Player(models.Model):
     ):
         """saves user and creates deck for him with 16 heroes"""
         super(Player, self).save()
+        PlayerAuthSession.objects.create(player=self)
         deck = Deck.objects.create(player=self)
         types = (
             ["ARCHER" for _ in range(4)]
@@ -61,6 +64,9 @@ class Player(models.Model):
     def get_last_deck(self):
         return Deck.objects.filter(player=self).last()
 
+    def get_auth_session(self):
+        return PlayerAuthSession.objects.get(player=self).jit
+
     def __str__(self):
         return self.name
 
@@ -155,3 +161,10 @@ class HeroInDeck(models.Model):
         db_table = "hero_in_deck"
         verbose_name = "Hero in deck"
         verbose_name_plural = "Heroes in decks"
+
+
+class PlayerAuthSession(models.Model):
+    player = models.OneToOneField(
+        Player, unique_for_month=True, on_delete=models.CASCADE
+    )
+    jit = models.CharField(max_length=30, default=generate_charset(30))

game/services/jwt.py

@@ -43,7 +43,3 @@ def read_jwt(token: str) -> dict | bool:
     payload.pop("exp", None)
 
     return payload
-
-
-def generate_refresh_token(payload: dict) -> str:
-    return sign_jwt(payload)

game/urls.py

@@ -6,11 +6,13 @@ from game.api.v1.views import (
     PlayerCreateView,
     DeckCreateView,
     RetireUpdateDeleteDeckView,
+    RefreshAuthKey,
 )
 
 urlpatterns = [
     path("v1/hero/", ListCreateHeroView.as_view(), name="hero_api_create"),
     path("v1/hero/<uuid:uuid>", RetrieveHeroView.as_view(), name="hero_api_retrieve"),
+    path("v1/player/refresh", RefreshAuthKey.as_view(), name="player_create_api"),
     path("v1/player/", PlayerCreateView.as_view(), name="player_create_api"),
     path("v1/deck/", DeckCreateView.as_view(), name="deck_create_api"),
     path(