150 lines
4.5 KiB
C
150 lines
4.5 KiB
C
/** @file
|
|
This library abstract how to access TPM2 hardware device.
|
|
|
|
;******************************************************************************
|
|
;* Copyright (c) 2014 - 2015, Insyde Software Corp. All Rights Reserved.
|
|
;*
|
|
;* You may not reproduce, distribute, publish, display, perform, modify, adapt,
|
|
;* transmit, broadcast, present, recite, release, license or otherwise exploit
|
|
;* any part of this publication in any form, by any means, without the prior
|
|
;* written permission of Insyde Software Corporation.
|
|
;*
|
|
;******************************************************************************
|
|
*/
|
|
#include <IndustryStandard/Tpm20.h>
|
|
#include <Library/BaseLib.h>
|
|
#include <Library/BaseMemoryLib.h>
|
|
#include <Library/IoLib.h>
|
|
#include <Library/TimerLib.h>
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/Tpm2DeviceLib.h>
|
|
#include <Library/PcdLib.h>
|
|
#include <Library/UefiBootServicesTableLib.h>
|
|
#include <Protocol/Tpm2Interface.h>
|
|
#include <Protocol/SmmBase2.h>
|
|
#include <Guid/TpmInstance.h>
|
|
|
|
STATIC TPM2_INTERFACE_PROTOCOL *mTpm2Interface = NULL;
|
|
|
|
/**
|
|
Return Tpm2 interface based on current phase.
|
|
|
|
@retval TPM2_INTERFACE_PROTOCOL A pointer to Tpm2 interface protocol
|
|
**/
|
|
TPM2_INTERFACE_PROTOCOL*
|
|
RetrieveTpm2Interface (
|
|
VOID
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
BOOLEAN InSmm;
|
|
EFI_SMM_BASE2_PROTOCOL *SmmBase;
|
|
EFI_SMM_SYSTEM_TABLE2 *Smst;
|
|
|
|
InSmm = FALSE;
|
|
|
|
Status = gBS->LocateProtocol (
|
|
&gEfiSmmBase2ProtocolGuid,
|
|
NULL,
|
|
(VOID **) &SmmBase
|
|
);
|
|
if (!EFI_ERROR (Status)) {
|
|
SmmBase->InSmm (SmmBase, &InSmm);
|
|
}
|
|
|
|
if (!InSmm) {
|
|
//
|
|
// In boot service
|
|
//
|
|
Status = gBS->LocateProtocol (
|
|
&gTpm2InterfaceGuid,
|
|
NULL,
|
|
(VOID **) &mTpm2Interface
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
DEBUG ((EFI_D_ERROR, "Tpm2Interface Error!\n"));
|
|
mTpm2Interface = NULL;
|
|
}
|
|
} else {
|
|
//
|
|
// In Smm
|
|
//
|
|
SmmBase->GetSmstLocation (SmmBase, &Smst);
|
|
|
|
Status = Smst->SmmLocateProtocol (
|
|
&gTpm2InterfaceGuid,
|
|
NULL,
|
|
(VOID **) &mTpm2Interface
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
DEBUG ((EFI_D_ERROR, "Tpm2Interface Error!\n"));
|
|
mTpm2Interface = NULL;
|
|
}
|
|
}
|
|
|
|
return mTpm2Interface;
|
|
}
|
|
|
|
/**
|
|
This service enables the sending of commands to the TPM2.
|
|
|
|
@param[in] InputParameterBlockSize Size of the TPM2 input parameter block.
|
|
@param[in] InputParameterBlock Pointer to the TPM2 input parameter block.
|
|
@param[in,out] OutputParameterBlockSize Size of the TPM2 output parameter block.
|
|
@param[in] OutputParameterBlock Pointer to the TPM2 output parameter block.
|
|
|
|
@retval EFI_SUCCESS The command byte stream was successfully sent to the device and a response was successfully received.
|
|
@retval EFI_DEVICE_ERROR The command was not successfully sent to the device or a response was not successfully received from the device.
|
|
@retval EFI_BUFFER_TOO_SMALL The output parameter block is too small.
|
|
@retval EFI_UNSUPPORTED TPM2_INTERFACE_PROTOCOL not found.
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
ProtocolBasedTpm2SubmitCommand (
|
|
IN UINT32 InputParameterBlockSize,
|
|
IN UINT8 *InputParameterBlock,
|
|
IN OUT UINT32 *OutputParameterBlockSize,
|
|
IN UINT8 *OutputParameterBlock
|
|
)
|
|
{
|
|
TPM2_INTERFACE_PROTOCOL *Tpm2Interface;
|
|
|
|
Tpm2Interface = RetrieveTpm2Interface ();
|
|
if (Tpm2Interface == NULL) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
|
|
return Tpm2Interface->SummitCommand (
|
|
Tpm2Interface,
|
|
InputParameterBlock,
|
|
InputParameterBlockSize,
|
|
OutputParameterBlock,
|
|
OutputParameterBlockSize
|
|
);
|
|
|
|
}
|
|
|
|
/**
|
|
This service requests use TPM2.
|
|
|
|
@retval EFI_SUCCESS Get the control of TPM2 chip.
|
|
@retval EFI_NOT_FOUND TPM2 not found.
|
|
@retval EFI_DEVICE_ERROR Unexpected device behavior.
|
|
@retval EFI_UNSUPPORTED TPM2_INTERFACE_PROTOCOL not found.
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
ProtocolBasedTpm2RequestUseTpm (
|
|
VOID
|
|
)
|
|
{
|
|
TPM2_INTERFACE_PROTOCOL *Tpm2Interface;
|
|
|
|
Tpm2Interface = RetrieveTpm2Interface ();
|
|
if (Tpm2Interface == NULL) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
|
|
return Tpm2Interface->RequestUse (Tpm2Interface);
|
|
}
|