// Copyright 2015 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.

// THIS CODE IS GENERATED - DO NOT MODIFY!

#include "MemoryLib_fp.h"

#include "GetRandom_fp.h"

#if IS_CC_ENABLED(GetRandom)

static UINT16 GetRandom_Out_Marshal(GetRandom_Out* source,

                                    TPMI_ST_COMMAND_TAG tag,

                                    BYTE** buffer,

                                    INT32* size) {

  UINT16 total_size = 0;

  UINT32 parameter_size = 0;

  BYTE* parameter_size_location;

  INT32 parameter_size_size = sizeof(UINT32);

  UINT32 num_response_handles = 0;

  // Add parameter_size=0 to indicate size of the parameter area. Will be

  // replaced later by computed parameter_size.

  if (tag == TPM_ST_SESSIONS) {

    parameter_size_location = *buffer;

    // Don't add to total_size, but increment *buffer and decrement *size.

    UINT32_Marshal(&parameter_size, buffer, size);

  }

  // Marshal response parameters.

  total_size += TPM2B_DIGEST_Marshal(&source->randomBytes, buffer, size);

  // Compute actual parameter_size. Don't add result to total_size.

  if (tag == TPM_ST_SESSIONS) {

    parameter_size = total_size - num_response_handles * sizeof(TPM_HANDLE);

    UINT32_Marshal(&parameter_size, &parameter_size_location,

                   &parameter_size_size);

  }

  return total_size;

}

#endif

static TPM_RC GetRandom_In_Unmarshal(GetRandom_In* target,

                                     TPM_HANDLE request_handles[],

                                     BYTE** buffer,

                                     INT32* size) {

  TPM_RC result = TPM_RC_SUCCESS;

  // Unmarshal request parameters.

  result = UINT16_Unmarshal(&target->bytesRequested, buffer, size);

  if (result != TPM_RC_SUCCESS) {

    return result;

  }

  if ((result == TPM_RC_SUCCESS) && *size) {

    result = TPM_RC_SIZE;

  }

  return result;

}

TPM_RC Exec_GetRandom(TPMI_ST_COMMAND_TAG tag,

                      BYTE** request_parameter_buffer,

                      INT32* request_parameter_buffer_size,

                      TPM_HANDLE request_handles[],

                      UINT32* response_handle_buffer_size,

                      UINT32* response_parameter_buffer_size) {

  TPM_RC result = TPM_RC_SUCCESS;

  GetRandom_In in;

  GetRandom_Out out;

#if IS_CC_ENABLED(GetRandom)

  BYTE* response_buffer;

  INT32 response_buffer_size;

  UINT16 bytes_marshalled;

  UINT16 num_response_handles = 0;

#endif

  *response_handle_buffer_size = 0;

  *response_parameter_buffer_size = 0;

  // Unmarshal request parameters to input structure.

  result =

      GetRandom_In_Unmarshal(&in, request_handles, request_parameter_buffer,

                             request_parameter_buffer_size);

  if (result != TPM_RC_SUCCESS) {

    return result;

  }

  // Execute command.

  result = TPM2_GetRandom(&in, &out);

  if (result != TPM_RC_SUCCESS) {

    return result;

  }

// Marshal output structure to global response buffer.

#if IS_CC_ENABLED(GetRandom)

  response_buffer = MemoryGetResponseBuffer(TPM_CC_GetRandom) + 10;

  response_buffer_size = MAX_RESPONSE_SIZE - 10;

  bytes_marshalled =

      GetRandom_Out_Marshal(&out, tag, &response_buffer, &response_buffer_size);

  *response_handle_buffer_size = num_response_handles * sizeof(TPM_HANDLE);

  *response_parameter_buffer_size =

      bytes_marshalled - *response_handle_buffer_size;

  return TPM_RC_SUCCESS;

#endif

  return TPM_RC_COMMAND_CODE;

}