void InitializeClient(out byte[] clientBlob, byte[] serverBlob, out bool continueProcessing)
        {
            clientBlob         = null;
            continueProcessing = true;
            SecBufferDesc    clientBufferDesc = new SecBufferDesc(MAX_TOKEN_SIZE);
            SECURITY_INTEGER initLifetime     = new SECURITY_INTEGER(0);
            int ss = -1;

            try
            {
                uint ContextAttributes = 0;

                if (serverBlob == null)
                {
                    ss = InitializeSecurityContext(
                        ref outboundCredentials,
                        IntPtr.Zero,
                        targetName,
                        STANDARD_CONTEXT_ATTRIBUTES,
                        0,
                        SECURITY_NETWORK_DREP,
                        IntPtr.Zero, /* always zero first time around */
                        0,
                        out clientContext,
                        out clientBufferDesc,
                        out ContextAttributes,
                        out initLifetime);
                }
                else
                {
                    SecBufferDesc serverBufferDesc = new SecBufferDesc(serverBlob);

                    try
                    {
                        ss = InitializeSecurityContext(ref outboundCredentials,
                                                       ref clientContext,
                                                       targetName,
                                                       STANDARD_CONTEXT_ATTRIBUTES,
                                                       0,
                                                       SECURITY_NETWORK_DREP,
                                                       ref serverBufferDesc,
                                                       0,
                                                       out clientContext,
                                                       out clientBufferDesc,
                                                       out ContextAttributes,
                                                       out initLifetime);
                    }
                    finally
                    {
                        serverBufferDesc.Dispose();
                    }
                }


                if ((SEC_I_COMPLETE_NEEDED == ss) ||
                    (SEC_I_COMPLETE_AND_CONTINUE == ss))
                {
                    CompleteAuthToken(ref clientContext, ref clientBufferDesc);
                }

                if (ss != SEC_E_OK &&
                    ss != SEC_I_CONTINUE_NEEDED &&
                    ss != SEC_I_COMPLETE_NEEDED &&
                    ss != SEC_I_COMPLETE_AND_CONTINUE)
                {
                    throw new MyCatException(
                              "InitializeSecurityContext() failed  with errorcode " + ss);
                }

                clientBlob = clientBufferDesc.GetSecBufferByteArray();
            }
            finally
            {
                clientBufferDesc.Dispose();
            }
            continueProcessing = (ss != SEC_E_OK && ss != SEC_I_COMPLETE_NEEDED);
        }
 static extern int CompleteAuthToken(
     ref SECURITY_HANDLE phContext,
     ref SecBufferDesc pToken);