diff --git a/SMBLibrary/Server/ConnectionState/SMB1ConnectionState.cs b/SMBLibrary/Server/ConnectionState/SMB1ConnectionState.cs
index b73cd14..5f4c73e 100644
--- a/SMBLibrary/Server/ConnectionState/SMB1ConnectionState.cs
+++ b/SMBLibrary/Server/ConnectionState/SMB1ConnectionState.cs
@@ -52,20 +52,20 @@ namespace SMBLibrary.Server
             return null;
         }
 
-        public SMB1Session CreateSession(ushort userID, string userName, string machineName, object accessToken)
+        public SMB1Session CreateSession(ushort userID, string userName, string machineName, byte[] sessionKey, object accessToken)
         {
-            SMB1Session session = new SMB1Session(this, userID, userName, machineName, accessToken);
+            SMB1Session session = new SMB1Session(this, userID, userName, machineName, sessionKey, accessToken);
             m_sessions.Add(userID, session);
             return session;
         }
 
         /// <returns>null if all UserID values have already been allocated</returns>
-        public SMB1Session CreateSession(string userName, string machineName, object accessToken)
+        public SMB1Session CreateSession(string userName, string machineName, byte[] sessionKey, object accessToken)
         {
             ushort? userID = AllocateUserID();
             if (userID.HasValue)
             {
-                return CreateSession(userID.Value, userName, machineName, accessToken);
+                return CreateSession(userID.Value, userName, machineName, sessionKey, accessToken);
             }
             return null;
         }
diff --git a/SMBLibrary/Server/ConnectionState/SMB1Session.cs b/SMBLibrary/Server/ConnectionState/SMB1Session.cs
index 4650d72..c57b33b 100644
--- a/SMBLibrary/Server/ConnectionState/SMB1Session.cs
+++ b/SMBLibrary/Server/ConnectionState/SMB1Session.cs
@@ -17,6 +17,7 @@ namespace SMBLibrary.Server
 
         private SMB1ConnectionState m_connection;
         private ushort m_userID;
+        private byte[] m_sessionKey;
         private SecurityContext m_securityContext;
 
         // Key is TID
@@ -29,10 +30,11 @@ namespace SMBLibrary.Server
         private Dictionary<ushort, OpenSearch> m_openSearches = new Dictionary<ushort, OpenSearch>();
         private ushort m_nextSearchHandle = 1;
 
-        public SMB1Session(SMB1ConnectionState connection, ushort userID, string userName, string machineName, object accessToken)
+        public SMB1Session(SMB1ConnectionState connection, ushort userID, string userName, string machineName, byte[] sessionKey, object accessToken)
         {
             m_connection = connection;
             m_userID = userID;
+            m_sessionKey = sessionKey;
             m_securityContext = new SecurityContext(userName, machineName, connection.ClientEndPoint, connection.AuthenticationContext, accessToken);
         }
 
diff --git a/SMBLibrary/Server/SMB1/SessionSetupHelper.cs b/SMBLibrary/Server/SMB1/SessionSetupHelper.cs
index b1770f0..a514eca 100644
--- a/SMBLibrary/Server/SMB1/SessionSetupHelper.cs
+++ b/SMBLibrary/Server/SMB1/SessionSetupHelper.cs
@@ -33,18 +33,19 @@ namespace SMBLibrary.Server.SMB1
                 return new ErrorResponse(request.CommandName);
             }
 
+            byte[] sessionKey = securityProvider.GetContextAttribute(state.AuthenticationContext, GSSAttributeName.SessionKey) as byte[];
             object accessToken = securityProvider.GetContextAttribute(state.AuthenticationContext, GSSAttributeName.AccessToken);
             bool? isGuest = securityProvider.GetContextAttribute(state.AuthenticationContext, GSSAttributeName.IsGuest) as bool?;
             SMB1Session session;
             if (!isGuest.HasValue || !isGuest.Value)
             {
                 state.LogToServer(Severity.Information, "User '{0}' authenticated successfully.", message.UserName);
-                session = state.CreateSession(message.UserName, message.WorkStation, accessToken);
+                session = state.CreateSession(message.UserName, message.WorkStation, sessionKey, accessToken);
             }
             else
             {
                 state.LogToServer(Severity.Information, "User '{0}' failed authentication, logged in as guest.", message.UserName);
-                session = state.CreateSession("Guest", message.WorkStation, accessToken);
+                session = state.CreateSession("Guest", message.WorkStation, sessionKey, accessToken);
                 response.Action = SessionSetupAction.SetupGuest;
             }
 
@@ -110,17 +111,18 @@ namespace SMBLibrary.Server.SMB1
             {
                 string userName = securityProvider.GetContextAttribute(state.AuthenticationContext, GSSAttributeName.UserName) as string;
                 string machineName = securityProvider.GetContextAttribute(state.AuthenticationContext, GSSAttributeName.MachineName) as string;
+                byte[] sessionKey = securityProvider.GetContextAttribute(state.AuthenticationContext, GSSAttributeName.SessionKey) as byte[];
                 object accessToken = securityProvider.GetContextAttribute(state.AuthenticationContext, GSSAttributeName.AccessToken);
                 bool? isGuest = securityProvider.GetContextAttribute(state.AuthenticationContext, GSSAttributeName.IsGuest) as bool?;
                 if (!isGuest.HasValue || !isGuest.Value)
                 {
                     state.LogToServer(Severity.Information, "User '{0}' authenticated successfully.", userName);
-                    state.CreateSession(header.UID, userName, machineName, accessToken);
+                    state.CreateSession(header.UID, userName, machineName, sessionKey, accessToken);
                 }
                 else
                 {
                     state.LogToServer(Severity.Information, "User '{0}' failed authentication, logged in as guest.", userName);
-                    state.CreateSession(header.UID, "Guest", machineName, accessToken);
+                    state.CreateSession(header.UID, "Guest", machineName, sessionKey, accessToken);
                     response.Action = SessionSetupAction.SetupGuest;
                 }
             }