Fill in a successful response when no hardware TPM.

lib/chromeos/tlcl_stub.c

 /*
  * Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  * Alternatively, this software may be distributed under the terms of the
  * GNU General Public License ("GPL") version 2 as published by the Free
  * Software Foundation.
  */
 
@@ skipping 40 matching lines @@
 
 uint32_t TlclStubSendReceive(const uint8_t* request, int request_length,
                 uint8_t* response, int max_length)
 {
 #ifdef CONFIG_HARDWARE_TPM
         int ret;
         size_t recv_len = (size_t) max_length;
         ret= tis_sendrecv(request, request_length, response, &recv_len);
         if (ret)
                 return TPM_E_IOERROR;
+#else
+        /* Make a successful response */
+        uint8_t successful_response[10] =
+                        {0x0, 0x0, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x0};
+        memcpy(response, successful_response, 10);
 #endif
         return TPM_SUCCESS;
 }