Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.IdentityModel/System/IdentityModel/Tokens/UserNameSecurityToken.cs

@@ -0,0 +1,65 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+
+namespace System.IdentityModel.Tokens
+{
+    using System.Collections.ObjectModel;
+
+    public class UserNameSecurityToken : SecurityToken
+    {
+        string id;
+        string password;
+        string userName;
+        DateTime effectiveTime;
+
+        public UserNameSecurityToken(string userName, string password)
+            : this(userName, password, SecurityUniqueId.Create().Value)
+        {
+        }
+
+        public UserNameSecurityToken(string userName, string password, string id)
+        {   
+            if (userName == null)
+                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("userName");
+            if (userName == string.Empty)
+                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument(SR.GetString(SR.UserNameCannotBeEmpty));
+            
+            this.userName = userName;
+            this.password = password;
+            this.id = id;
+            this.effectiveTime = DateTime.UtcNow;
+        }
+
+        public override string Id
+        {
+            get { return this.id; }
+        }
+
+        public override ReadOnlyCollection<SecurityKey> SecurityKeys
+        {
+            get { return EmptyReadOnlyCollection<SecurityKey>.Instance; }
+        }
+
+        public override DateTime ValidFrom
+        {
+            get { return this.effectiveTime; }
+        }
+
+        public override DateTime ValidTo
+        {
+            // Never expire
+            get { return SecurityUtils.MaxUtcDateTime; }
+        }
+
+        public string UserName
+        {
+            get { return this.userName; }
+        }
+
+        public string Password
+        {
+            get { return this.password; }
+        }
+    }
+}