System.Data.SqlClient.SNINativeMethodWrapper.SNISecInitPackage C# (CSharp) Method

        internal static extern uint SNISecInitPackage(ref uint pcbMaxToken);

        private void LoadSSPILibrary()
        {
            if (TdsParserStateObjectFactory.UseManagedSNI)
            {
                return;
            }
            // Outer check so we don't acquire lock once it's loaded.
            if (!s_fSSPILoaded)
            {
                lock (s_tdsParserLock)
                {
                    // re-check inside lock
                    if (!s_fSSPILoaded)
                    {
                        // use local for ref param to defer setting s_maxSSPILength until we know the call succeeded.
                        uint maxLength = 0;

                        if (0 != SNINativeMethodWrapper.SNISecInitPackage(ref maxLength))
                        {
                            SSPIError(SQLMessage.SSPIInitializeError(), TdsEnums.INIT_SSPI_PACKAGE);
                        }

                        s_maxSSPILength = maxLength;
                        s_fSSPILoaded   = true;
                    }
                }
            }

            if (s_maxSSPILength > int.MaxValue)
            {
                throw SQL.InvalidSSPIPacketSize();   // SqlBu 332503
            }
        }