test/command.c.expected

/* 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.
 */

#include "command.h"

/* Sends a TPM_VerySimple command to the TPM and reads the response. */
uint32_t Ttl_TPM_VerySimple(void) {
  uint8_t buffer[TPM_MAX_COMMAND_LENGTH];
  uint32_t buffer_size = sizeof(buffer);
  uint32_t return_code;
  uint8_t* cursor = buffer;
  uint32_t read_bytes;
  TPM_TAG tag = TPM_TAG_RQU_COMMAND;
  uint32_t ordinal = TPM_ORD_VerySimple;
  uint32_t message_size = TPM_RQU_HEADER_SIZE;
  if (message_size > buffer_size) return TPM_BAD_PARAM_SIZE;
  TtlMarshal_uint16_t(&tag, &cursor);
  TtlMarshal_uint32_t(&message_size, &cursor);
  TtlMarshal_uint32_t(&ordinal, &cursor);
  RETURN_ON_FAILURE(TtlExecute(buffer, message_size, buffer_size, &read_bytes));
  cursor = buffer;
  TtlUnmarshal_uint16_t(&tag, &cursor);
  TtlUnmarshal_uint32_t(&message_size, &cursor);
  TtlUnmarshal_uint32_t(&return_code, &cursor);
  if (return_code != TPM_SUCCESS) return return_code;
  if (message_size != read_bytes) return TPM_E_COMMUNICATION_ERROR;
  if (message_size > buffer_size) return TPM_BAD_PARAM_SIZE;
  if (message_size != TPM_RSP_HEADER_SIZE) return TPM_BAD_PARAM_SIZE;
  return TPM_SUCCESS;
}