Fixed the way we convert DateTimes to the zone we expect.

7 files changed, 32 insertions, 7 deletions

diff --git a/src/DotNetOpenAuth/Messaging/Bindings/NonceMemoryStore.cs b/src/DotNetOpenAuth/Messaging/Bindings/NonceMemoryStore.cs
index 1d4d28e..3d624a6 100644
--- a/src/DotNetOpenAuth/Messaging/Bindings/NonceMemoryStore.cs
+++ b/src/DotNetOpenAuth/Messaging/Bindings/NonceMemoryStore.cs
@@ -73,7 +73,7 @@ namespace DotNetOpenAuth.Messaging.Bindings {
 		/// <see cref="StandardExpirationBindingElement.MaximumMessageAge"/> property.
 		/// </remarks>
 		public bool StoreNonce(string context, string nonce, DateTime timestamp) {
-			if (timestamp.ToUniversalTime() + this.maximumMessageAge < DateTime.UtcNow) {
+			if (timestamp.ToUniversalTimeSafe() + this.maximumMessageAge < DateTime.UtcNow) {
 				// The expiration binding element should have taken care of this, but perhaps
 				// it's at the boundary case.  We should fail just to be safe.
 				return false;
@@ -115,7 +115,7 @@ namespace DotNetOpenAuth.Messaging.Bindings {
 		/// </summary>
 		public void ClearExpiredNonces() {
 			lock (this.nonceLock) {
-				var oldNonceLists = this.usedNonces.Keys.Where(time => time.ToUniversalTime() + this.maximumMessageAge < DateTime.UtcNow).ToList();
+				var oldNonceLists = this.usedNonces.Keys.Where(time => time.ToUniversalTimeSafe() + this.maximumMessageAge < DateTime.UtcNow).ToList();
 				foreach (DateTime time in oldNonceLists) {
 					this.usedNonces.Remove(time);
 				}
diff --git a/src/DotNetOpenAuth/Messaging/Bindings/StandardExpirationBindingElement.cs b/src/DotNetOpenAuth/Messaging/Bindings/StandardExpirationBindingElement.cs
index 5fcf4bd..7b00e34 100644
--- a/src/DotNetOpenAuth/Messaging/Bindings/StandardExpirationBindingElement.cs
+++ b/src/DotNetOpenAuth/Messaging/Bindings/StandardExpirationBindingElement.cs
@@ -87,7 +87,7 @@ namespace DotNetOpenAuth.Messaging.Bindings {
 			if (expiringMessage != null) {
 				// Yes the UtcCreationDate is supposed to always be in UTC already,
 				// but just in case a given message failed to guarantee that, we do it here.
-				DateTime expirationDate = expiringMessage.UtcCreationDate.ToUniversalTime() + MaximumMessageAge;
+				DateTime expirationDate = expiringMessage.UtcCreationDate.ToUniversalTimeSafe() + MaximumMessageAge;
 				if (expirationDate < DateTime.UtcNow) {
 					throw new ExpiredMessageException(expirationDate, expiringMessage);
 				}
diff --git a/src/DotNetOpenAuth/Messaging/MessagingUtilities.cs b/src/DotNetOpenAuth/Messaging/MessagingUtilities.cs
index 78342ae..879af03 100644
--- a/src/DotNetOpenAuth/Messaging/MessagingUtilities.cs
+++ b/src/DotNetOpenAuth/Messaging/MessagingUtilities.cs
@@ -765,6 +765,30 @@ namespace DotNetOpenAuth.Messaging {
 		}
 
 		/// <summary>
+		/// Ensures that UTC times are converted to local times.  Unspecified kinds are unchanged.
+		/// </summary>
+		/// <returns>Local time.</returns>
+		internal static DateTime ToLocalTimeSafe(this DateTime value) {
+			if (value.Kind == DateTimeKind.Unspecified) {
+				return value;
+			}
+
+			return value.ToLocalTime();
+		}
+
+		/// <summary>
+		/// Ensures that local times are converted to UTC times.  Unspecified kinds are unchanged.
+		/// </summary>
+		/// <returns>UTC time.</returns>
+		internal static DateTime ToUniversalTimeSafe(this DateTime value) {
+			if (value.Kind == DateTimeKind.Unspecified) {
+				return value;
+			}
+
+			return value.ToUniversalTime();
+		}
+
+		/// <summary>
 		/// A class to convert a <see cref="Comparison&lt;T&gt;"/> into an <see cref="IComparer&lt;T&gt;"/>.
 		/// </summary>
 		/// <typeparam name="T">The type of objects being compared.</typeparam>
diff --git a/src/DotNetOpenAuth/OpenId/Association.cs b/src/DotNetOpenAuth/OpenId/Association.cs
index eb7c880..ce129bb 100644
--- a/src/DotNetOpenAuth/OpenId/Association.cs
+++ b/src/DotNetOpenAuth/OpenId/Association.cs
@@ -149,7 +149,7 @@ namespace DotNetOpenAuth.OpenId {
 			if (privateData == null) {
 				throw new ArgumentNullException("privateData");
 			}
-			expires = expires.ToUniversalTime();
+			expires = expires.ToUniversalTimeSafe();
 			TimeSpan remainingLifeLength = expires - DateTime.UtcNow;
 			byte[] secret = privateData; // the whole of privateData is the secret key for now.
 			// We figure out what derived type to instantiate based on the length of the secret.
diff --git a/src/DotNetOpenAuth/OpenId/Extensions/ProviderAuthenticationPolicy/DateTimeEncoder.cs b/src/DotNetOpenAuth/OpenId/Extensions/ProviderAuthenticationPolicy/DateTimeEncoder.cs
index 82297d0..9dc0574 100644
--- a/src/DotNetOpenAuth/OpenId/Extensions/ProviderAuthenticationPolicy/DateTimeEncoder.cs
+++ b/src/DotNetOpenAuth/OpenId/Extensions/ProviderAuthenticationPolicy/DateTimeEncoder.cs
@@ -7,6 +7,7 @@
 namespace DotNetOpenAuth.OpenId.Extensions.ProviderAuthenticationPolicy {
 	using System;
 	using System.Globalization;
+	using DotNetOpenAuth.Messaging;
 	using DotNetOpenAuth.Messaging.Reflection;
 
 	/// <summary>
@@ -39,7 +40,7 @@ namespace DotNetOpenAuth.OpenId.Extensions.ProviderAuthenticationPolicy {
 		public string Encode(object value) {
 			DateTime? dateTime = value as DateTime?;
 			if (dateTime.HasValue) {
-				return dateTime.Value.ToUniversalTime().ToString(PermissibleDateTimeFormats[0], CultureInfo.InvariantCulture);
+				return dateTime.Value.ToUniversalTimeSafe().ToString(PermissibleDateTimeFormats[0], CultureInfo.InvariantCulture);
 			} else {
 				return null;
 			}
diff --git a/src/DotNetOpenAuth/OpenId/Extensions/ProviderAuthenticationPolicy/PolicyResponse.cs b/src/DotNetOpenAuth/OpenId/Extensions/ProviderAuthenticationPolicy/PolicyResponse.cs
index 4ae6759..8cf493c 100644
--- a/src/DotNetOpenAuth/OpenId/Extensions/ProviderAuthenticationPolicy/PolicyResponse.cs
+++ b/src/DotNetOpenAuth/OpenId/Extensions/ProviderAuthenticationPolicy/PolicyResponse.cs
@@ -90,7 +90,7 @@ namespace DotNetOpenAuth.OpenId.Extensions.ProviderAuthenticationPolicy {
 
 					// Convert to UTC and cut to the second, since the protocol only allows for
 					// that level of precision.
-					this.authenticationTimeUtc = OpenIdUtilities.CutToSecond(value.Value.ToUniversalTime());
+					this.authenticationTimeUtc = OpenIdUtilities.CutToSecond(value.Value.ToUniversalTimeSafe());
 				} else {
 					this.authenticationTimeUtc = null;
 				}
diff --git a/src/DotNetOpenAuth/OpenId/Messages/IndirectSignedResponse.cs b/src/DotNetOpenAuth/OpenId/Messages/IndirectSignedResponse.cs
index e7a93ae..107046d 100644
--- a/src/DotNetOpenAuth/OpenId/Messages/IndirectSignedResponse.cs
+++ b/src/DotNetOpenAuth/OpenId/Messages/IndirectSignedResponse.cs
@@ -201,7 +201,7 @@ namespace DotNetOpenAuth.OpenId.Messages {
 		/// </exception>
 		DateTime IExpiringProtocolMessage.UtcCreationDate {
 			get { return this.creationDateUtc; }
-			set { this.creationDateUtc = value.ToUniversalTime(); }
+			set { this.creationDateUtc = value.ToUniversalTimeSafe(); }
 		}
 
 		/// <summary>