feat: use clock package

lib/src/jwk.dart

@@ -1,6 +1,7 @@
 /// [JSON Web Key](https://tools.ietf.org/html/rfc7517)
 library jose.jwk;
 
+import 'package:clock/clock.dart';
 import 'dart:async';
 import 'dart:async' as async show runZoned;
 import 'dart:convert';
@@ -598,7 +599,7 @@ class DefaultJsonWebKeySetLoader extends JsonWebKeySetLoader {
       case 'https':
       case 'http':
         var v = _cache[uri];
-        if (v != null && v.key.isAfter(DateTime.now())) {
+        if (v != null && v.key.isAfter(clock.now())) {
           return v.value;
         }
         var r = await _httpClient.get(uri);
@@ -638,6 +639,6 @@ class DefaultJsonWebKeySetLoader extends JsonWebKeySetLoader {
         }
       }
     }
-    return DateTime.now().add(delta);
+    return clock.now().add(delta);
   }
 }

lib/src/jwt.dart

@@ -1,6 +1,8 @@
 /// [JSON Web Token](https://tools.ietf.org/html/rfc7519)
 library jose.jwt;
 
+import 'package:clock/clock.dart';
+
 import 'jose.dart';
 import 'jwk.dart';
 import 'util.dart';
@@ -69,7 +71,7 @@ class JsonWebTokenClaims extends JsonObject {
     Uri? issuer,
     String? clientId,
   }) sync* {
-    final now = DateTime.now();
+    final now = clock.now();
     final diff = now.difference(expiry!);
     if (diff > expiryTolerance) {
       yield JoseException(

pubspec.yaml

@@ -17,6 +17,7 @@ dependencies:
   http_parser: ^4.0.0
   asn1lib: ^1.0.0
   collection: ^1.14.13
+  clock: ^1.1.1
 
 dev_dependencies:
   test: ^1.24.4