2 files changed, 14 insertions, 0 deletions
diff --git a/src/OpenID/OpenIdProviderMvc/Code/FormsAuthenticationService.cs b/src/OpenID/OpenIdProviderMvc/Code/FormsAuthenticationService.cs
index 22db860..1f5ea54 100644
--- a/src/OpenID/OpenIdProviderMvc/Code/FormsAuthenticationService.cs
+++ b/src/OpenID/OpenIdProviderMvc/Code/FormsAuthenticationService.cs
@@ -10,6 +10,18 @@
 			get { return HttpContext.Current.User.Identity.Name; }
 		}
 
+		public DateTime? SignedInTimestampUtc {
+			get {
+				var cookie = HttpContext.Current.Request.Cookies[FormsAuthentication.FormsCookieName];
+				if (cookie != null) {
+					var ticket = FormsAuthentication.Decrypt(cookie.Value);
+					return ticket.IssueDate.ToUniversalTime();
+				} else {
+					return null;
+				}
+			}
+		}
+
 		public void SignIn(string userName, bool createPersistentCookie) {
 			FormsAuthentication.SetAuthCookie(userName, createPersistentCookie);
 		}
diff --git a/src/OpenID/OpenIdProviderMvc/Code/IFormsAuthentication.cs b/src/OpenID/OpenIdProviderMvc/Code/IFormsAuthentication.cs
index d4c8a01..09856e9 100644
--- a/src/OpenID/OpenIdProviderMvc/Code/IFormsAuthentication.cs
+++ b/src/OpenID/OpenIdProviderMvc/Code/IFormsAuthentication.cs
@@ -17,6 +17,8 @@ using System.Web.Security;
 	public interface IFormsAuthentication {
 		string SignedInUsername { get; }
 
+		DateTime? SignedInTimestampUtc { get; }
+
 		void SignIn(string userName, bool createPersistentCookie);
 
 		void SignOut();