5 files changed, 24 insertions, 29 deletions
diff --git a/crypto/src/asn1/x509/TBSCertList.cs b/crypto/src/asn1/x509/TBSCertList.cs
index 865cfdd3d..2b288850f 100644
--- a/crypto/src/asn1/x509/TBSCertList.cs
+++ b/crypto/src/asn1/x509/TBSCertList.cs
@@ -193,7 +193,7 @@ namespace Org.BouncyCastle.Asn1.X509
             thisUpdate = Time.GetInstance(seq[seqPos++]);
 
 			if (seqPos < seq.Count
-                && (seq[seqPos] is DerUtcTime
+                && (seq[seqPos] is Asn1UtcTime
                    || seq[seqPos] is Asn1GeneralizedTime
                    || seq[seqPos] is Time))
             {
diff --git a/crypto/src/asn1/x509/Time.cs b/crypto/src/asn1/x509/Time.cs
index 791f08053..1a6ac15c0 100644
--- a/crypto/src/asn1/x509/Time.cs
+++ b/crypto/src/asn1/x509/Time.cs
@@ -22,7 +22,7 @@ namespace Org.BouncyCastle.Asn1.X509
         {
             if (time == null)
                 throw new ArgumentNullException("time");
-            if (!(time is DerUtcTime) && !(time is Asn1GeneralizedTime))
+            if (!(time is Asn1UtcTime) && !(time is Asn1GeneralizedTime))
                 throw new ArgumentException("unknown object passed to Time");
 
             this.time = time;
@@ -49,25 +49,24 @@ namespace Org.BouncyCastle.Asn1.X509
             }
         }
 
-        public static Time GetInstance(
-            object obj)
+        public static Time GetInstance(object obj)
         {
-            if (obj == null || obj is Time)
-                return (Time)obj;
-            if (obj is DerUtcTime)
-                return new Time((DerUtcTime)obj);
-            if (obj is Asn1GeneralizedTime)
-                return new Time((Asn1GeneralizedTime)obj);
+            if (obj == null)
+                return null;
+            if (obj is Time time)
+                return time;
+            if (obj is Asn1UtcTime utcTime)
+                return new Time(utcTime);
+            if (obj is Asn1GeneralizedTime generalizedTime)
+                return new Time(generalizedTime);
 
             throw new ArgumentException("unknown object in factory: " + Platform.GetTypeName(obj), "obj");
         }
 
         public string GetTime()
         {
-            if (time is DerUtcTime)
-            {
-                return ((DerUtcTime)time).AdjustedTimeString;
-            }
+            if (time is Asn1UtcTime utcTime)
+                return utcTime.AdjustedTimeString;
 
             return ((Asn1GeneralizedTime)time).GetTime();
         }
@@ -80,14 +79,10 @@ namespace Org.BouncyCastle.Asn1.X509
         {
             try
             {
-                if (time is DerUtcTime)
-                {
-                    return ((DerUtcTime)time).ToAdjustedDateTime();
-                }
-                else
-                {
-                    return ((Asn1GeneralizedTime)time).ToDateTime();
-                }
+                if (time is Asn1UtcTime utcTime)
+                    return utcTime.ToAdjustedDateTime();
+
+                return ((Asn1GeneralizedTime)time).ToDateTime();
             }
             catch (FormatException e)
             {
diff --git a/crypto/src/asn1/x509/V1TBSCertificateGenerator.cs b/crypto/src/asn1/x509/V1TBSCertificateGenerator.cs
index 20b525a48..9cbff1ef0 100644
--- a/crypto/src/asn1/x509/V1TBSCertificateGenerator.cs
+++ b/crypto/src/asn1/x509/V1TBSCertificateGenerator.cs
@@ -56,7 +56,7 @@ namespace Org.BouncyCastle.Asn1.X509
         }
 
 		public void SetStartDate(
-            DerUtcTime startDate)
+            Asn1UtcTime startDate)
         {
             this.startDate = new Time(startDate);
         }
@@ -68,7 +68,7 @@ namespace Org.BouncyCastle.Asn1.X509
         }
 
 		public void SetEndDate(
-            DerUtcTime endDate)
+            Asn1UtcTime endDate)
         {
             this.endDate = new Time(endDate);
         }
diff --git a/crypto/src/asn1/x509/V2TBSCertListGenerator.cs b/crypto/src/asn1/x509/V2TBSCertListGenerator.cs
index 546dc91f9..aa1a0b95d 100644
--- a/crypto/src/asn1/x509/V2TBSCertListGenerator.cs
+++ b/crypto/src/asn1/x509/V2TBSCertListGenerator.cs
@@ -55,13 +55,13 @@ namespace Org.BouncyCastle.Asn1.X509
         }
 
 		public void SetThisUpdate(
-            DerUtcTime thisUpdate)
+            Asn1UtcTime thisUpdate)
         {
             this.thisUpdate = new Time(thisUpdate);
         }
 
 		public void SetNextUpdate(
-            DerUtcTime nextUpdate)
+            Asn1UtcTime nextUpdate)
         {
             this.nextUpdate = (nextUpdate != null)
 				?	new Time(nextUpdate)
@@ -90,7 +90,7 @@ namespace Org.BouncyCastle.Asn1.X509
 			crlEntries.Add(crlEntry);
 		}
 
-		public void AddCrlEntry(DerInteger userCertificate, DerUtcTime revocationDate, int reason)
+		public void AddCrlEntry(DerInteger userCertificate, Asn1UtcTime revocationDate, int reason)
 		{
 			AddCrlEntry(userCertificate, new Time(revocationDate), reason);
 		}
diff --git a/crypto/src/asn1/x509/V3TBSCertificateGenerator.cs b/crypto/src/asn1/x509/V3TBSCertificateGenerator.cs
index beb469a0d..544582ddb 100644
--- a/crypto/src/asn1/x509/V3TBSCertificateGenerator.cs
+++ b/crypto/src/asn1/x509/V3TBSCertificateGenerator.cs
@@ -58,7 +58,7 @@ namespace Org.BouncyCastle.Asn1.X509
         }
 
 		public void SetStartDate(
-            DerUtcTime startDate)
+            Asn1UtcTime startDate)
         {
             this.startDate = new Time(startDate);
         }
@@ -70,7 +70,7 @@ namespace Org.BouncyCastle.Asn1.X509
         }
 
 		public void SetEndDate(
-            DerUtcTime endDate)
+            Asn1UtcTime endDate)
         {
             this.endDate = new Time(endDate);
         }