SecurityPkg/Library/Tpm2CommandLib/Tpm2Startup.c

   1 /** @file
   2   Implement TPM2 Startup related command.
   3
   4 Copyright (c) 2013, Intel Corporation. All rights reserved. <BR>
   5 This program and the accompanying materials
   6 are licensed and made available under the terms and conditions of the BSD License
   7 which accompanies this distribution.  The full text of the license may be found at
   8 http://opensource.org/licenses/bsd-license.php
   9
  10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include <IndustryStandard/UefiTcgPlatform.h>
  16 #include <Library/Tpm2CommandLib.h>
  17 #include <Library/Tpm2DeviceLib.h>
  18 #include <Library/BaseMemoryLib.h>
  19 #include <Library/BaseLib.h>
  20 #include <Library/DebugLib.h>
  21
  22 #pragma pack(1)
  23
  24 typedef struct {
  25   TPM2_COMMAND_HEADER  Header;
  26   TPM_SU               StartupType;
  27 } TPM2_STARTUP_COMMAND;
  28
  29 typedef struct {
  30   TPM2_RESPONSE_HEADER Header;
  31 } TPM2_STARTUP_RESPONSE;
  32
  33 typedef struct {
  34   TPM2_COMMAND_HEADER  Header;
  35   TPM_SU               ShutdownType;
  36 } TPM2_SHUTDOWN_COMMAND;
  37
  38 typedef struct {
  39   TPM2_RESPONSE_HEADER Header;
  40 } TPM2_SHUTDOWN_RESPONSE;
  41
  42 #pragma pack()
  43
  44 /**
  45   Send Startup command to TPM2.
  46
  47   @param[in] StartupType           TPM_SU_CLEAR or TPM_SU_STATE
  48
  49   @retval EFI_SUCCESS      Operation completed successfully.
  50   @retval EFI_DEVICE_ERROR Unexpected device behavior.
  51 **/
  52 EFI_STATUS
  53 EFIAPI
  54 Tpm2Startup (
  55   IN      TPM_SU             StartupType
  56   )
  57 {
  58   EFI_STATUS                        Status;
  59   TPM2_STARTUP_COMMAND              Cmd;
  60   TPM2_STARTUP_RESPONSE             Res;
  61   UINT32                            ResultBufSize;
  62
  63   Cmd.Header.tag         = SwapBytes16(TPM_ST_NO_SESSIONS);
  64   Cmd.Header.paramSize   = SwapBytes32(sizeof(Cmd));
  65   Cmd.Header.commandCode = SwapBytes32(TPM_CC_Startup);
  66   Cmd.StartupType        = SwapBytes16(StartupType);
  67
  68   ResultBufSize = sizeof(Res);
  69   Status = Tpm2SubmitCommand (sizeof(Cmd), (UINT8 *)&Cmd, &ResultBufSize, (UINT8 *)&Res);
  70
  71   return Status;
  72 }
  73
  74 /**
  75   Send Shutdown command to TPM2.
  76
  77   @param[in] ShutdownType           TPM_SU_CLEAR or TPM_SU_STATE.
  78
  79   @retval EFI_SUCCESS      Operation completed successfully.
  80   @retval EFI_DEVICE_ERROR Unexpected device behavior.
  81 **/
  82 EFI_STATUS
  83 EFIAPI
  84 Tpm2Shutdown (
  85   IN      TPM_SU             ShutdownType
  86   )
  87 {
  88   EFI_STATUS                        Status;
  89   TPM2_SHUTDOWN_COMMAND             Cmd;
  90   TPM2_SHUTDOWN_RESPONSE            Res;
  91   UINT32                            ResultBufSize;
  92
  93   Cmd.Header.tag         = SwapBytes16(TPM_ST_NO_SESSIONS);
  94   Cmd.Header.paramSize   = SwapBytes32(sizeof(Cmd));
  95   Cmd.Header.commandCode = SwapBytes32(TPM_CC_Shutdown);
  96   Cmd.ShutdownType       = SwapBytes16(ShutdownType);
  97
  98   ResultBufSize = sizeof(Res);
  99   Status = Tpm2SubmitCommand (sizeof(Cmd), (UINT8 *)&Cmd, &ResultBufSize, (UINT8 *)&Res);
 100
 101   return Status;
 102 }