Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.ServiceModel/System/ServiceModel/Security/NonceCache.cs

@@ -0,0 +1,67 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.IO;
+using System.Globalization;
+using System.Runtime;
+
+namespace System.ServiceModel.Security
+{
+    public abstract class NonceCache
+    {
+        TimeSpan cachingTime;
+        int maxCachedNonces;
+
+        /// <summary>
+        /// TThe max timespan after which a Nonce is deleted from the NonceCache. This value should be atleast twice the maxclock Skew added to the replayWindow size.
+        /// </summary>
+        public TimeSpan CachingTimeSpan
+        {
+            get
+            {
+                return this.cachingTime;
+            }
+            set
+            {
+                if (value < TimeSpan.Zero)
+                {
+                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("value", value,
+                        SR.GetString(SR.SFxTimeoutOutOfRange0)));
+                }
+
+                if (TimeoutHelper.IsTooLarge(value))
+                {
+                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("value", value,
+                        SR.GetString(SR.SFxTimeoutOutOfRangeTooBig)));
+                }
+
+                this.cachingTime = value;
+            }
+        }
+
+        /// <summary>
+        /// The maximum size of the NonceCache.
+        /// </summary>
+        public int CacheSize
+        {
+            get
+            {
+                return this.maxCachedNonces;
+            }
+            set
+            {
+                if (value < 0)
+                {
+                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("value", value,
+                                                    SR.GetString(SR.ValueMustBeNonNegative)));
+                }
+                this.maxCachedNonces = value;
+
+            }
+        }
+
+        public abstract bool TryAddNonce(byte[] nonce);
+        public abstract bool CheckNonce(byte[] nonce);
+    }
+}