From 284ce967fba9e307804d89cfa2b6c10802767728 Mon Sep 17 00:00:00 2001
From: foamyguy <foamyguy@gmail.com>
Date: Thu, 19 May 2022 19:19:15 -0500
Subject: [PATCH] typing Literal fallback

---
 adafruit_rsa/_compat.py      | 8 +++++++-
 adafruit_rsa/key.py          | 7 ++++++-
 adafruit_rsa/machine_size.py | 7 ++++++-
 adafruit_rsa/pkcs1.py        | 7 ++++++-
 adafruit_rsa/prime.py        | 5 ++++-
 5 files changed, 29 insertions(+), 5 deletions(-)

diff --git a/adafruit_rsa/_compat.py b/adafruit_rsa/_compat.py
index 09eec3f..b0e613a 100755
--- a/adafruit_rsa/_compat.py
+++ b/adafruit_rsa/_compat.py
@@ -14,10 +14,16 @@
 from struct import pack
 
 try:
-    from typing import Any, Literal, Tuple
+    from typing import Any, Tuple
+
+    try:
+        from typing import Literal
+    except ImportError:
+        from typing_extensions import Literal
 except ImportError:
     pass
 
+
 __version__ = "0.0.0-auto.0"
 __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_RSA.git"
 
diff --git a/adafruit_rsa/key.py b/adafruit_rsa/key.py
index 6770f59..8cb3bc1 100755
--- a/adafruit_rsa/key.py
+++ b/adafruit_rsa/key.py
@@ -35,7 +35,12 @@
 import adafruit_rsa.core
 
 try:
-    from typing import Any, Tuple, Dict, Callable, Literal
+    from typing import Any, Tuple, Dict, Callable
+
+    try:
+        from typing import Literal
+    except ImportError:
+        from typing_extensions import Literal
 except ImportError:
     pass
 
diff --git a/adafruit_rsa/machine_size.py b/adafruit_rsa/machine_size.py
index e12dda6..caad2cc 100755
--- a/adafruit_rsa/machine_size.py
+++ b/adafruit_rsa/machine_size.py
@@ -13,7 +13,12 @@
 import sys
 
 try:
-    from typing import Literal, Tuple
+    from typing import Tuple
+
+    try:
+        from typing import Literal
+    except ImportError:
+        from typing_extensions import Literal
 except ImportError:
     pass
 
diff --git a/adafruit_rsa/pkcs1.py b/adafruit_rsa/pkcs1.py
index 28041ee..db0bb21 100755
--- a/adafruit_rsa/pkcs1.py
+++ b/adafruit_rsa/pkcs1.py
@@ -26,7 +26,7 @@
 from adafruit_rsa import common, transform, core
 
 try:
-    from typing import Optional, Iterator, Union, Literal
+    from typing import Optional, Iterator, Union
     from adafruit_rsa.key import PublicKey, PrivateKey
 
     try:
@@ -34,6 +34,11 @@
     except ImportError:
         from typing_extensions import Protocol
 
+    try:
+        from typing import Literal
+    except ImportError:
+        from typing_extensions import Literal
+
     class _FileLikeObject(Protocol):
         """A file like object that implements the :meth:`read` method"""
 
diff --git a/adafruit_rsa/prime.py b/adafruit_rsa/prime.py
index 62aabeb..7ce171f 100755
--- a/adafruit_rsa/prime.py
+++ b/adafruit_rsa/prime.py
@@ -17,7 +17,10 @@
 import adafruit_rsa.randnum
 
 try:
-    from typing import Literal
+    try:
+        from typing import Literal
+    except ImportError:
+        from typing_extensions import Literal
 except ImportError:
     pass