From 2d260cec1a28c277fdfff888caa969ce367fe004 Mon Sep 17 00:00:00 2001
From: Simon Cropp <simon.cropp@gmail.com>
Date: Thu, 21 Nov 2024 23:28:18 +1100
Subject: [PATCH] fix incorrect as usage in GetAuthenticationTimeEpoch

---
 src/IdentityServer/Extensions/PrincipalExtensions.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/IdentityServer/Extensions/PrincipalExtensions.cs b/src/IdentityServer/Extensions/PrincipalExtensions.cs
index 634a9ee5d..5abd90487 100644
--- a/src/IdentityServer/Extensions/PrincipalExtensions.cs
+++ b/src/IdentityServer/Extensions/PrincipalExtensions.cs
@@ -46,7 +46,7 @@ public static long GetAuthenticationTimeEpoch(this IPrincipal principal)
     [DebuggerStepThrough]
     public static long GetAuthenticationTimeEpoch(this IIdentity identity)
     {
-        var id = identity as ClaimsIdentity;
+        var id = (ClaimsIdentity)identity;
         var claim = id.FindFirst(JwtClaimTypes.AuthenticationTime);
 
         if (claim == null) throw new InvalidOperationException("auth_time is missing.");