mirror of https://github.com/acidanthera/audk.git
120 lines
3.7 KiB
C
120 lines
3.7 KiB
C
/** @file
|
|
This library is TPM2 TCG2 protocol lib.
|
|
|
|
Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved. <BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#include <Library/BaseLib.h>
|
|
#include <Library/BaseMemoryLib.h>
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/UefiBootServicesTableLib.h>
|
|
#include <Library/Tpm2DeviceLib.h>
|
|
#include <Protocol/Tcg2Protocol.h>
|
|
#include <IndustryStandard/Tpm20.h>
|
|
|
|
EFI_TCG2_PROTOCOL *mTcg2Protocol = NULL;
|
|
|
|
/**
|
|
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.
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
Tpm2SubmitCommand (
|
|
IN UINT32 InputParameterBlockSize,
|
|
IN UINT8 *InputParameterBlock,
|
|
IN OUT UINT32 *OutputParameterBlockSize,
|
|
IN UINT8 *OutputParameterBlock
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
TPM2_RESPONSE_HEADER *Header;
|
|
|
|
if (mTcg2Protocol == NULL) {
|
|
Status = gBS->LocateProtocol (&gEfiTcg2ProtocolGuid, NULL, (VOID **) &mTcg2Protocol);
|
|
if (EFI_ERROR (Status)) {
|
|
//
|
|
// Tcg2 protocol is not installed. So, TPM2 is not present.
|
|
//
|
|
DEBUG ((EFI_D_ERROR, "Tpm2SubmitCommand - Tcg2 - %r\n", Status));
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
}
|
|
//
|
|
// Assume when Tcg2 Protocol is ready, RequestUseTpm already done.
|
|
//
|
|
Status = mTcg2Protocol->SubmitCommand (
|
|
mTcg2Protocol,
|
|
InputParameterBlockSize,
|
|
InputParameterBlock,
|
|
*OutputParameterBlockSize,
|
|
OutputParameterBlock
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
Header = (TPM2_RESPONSE_HEADER *)OutputParameterBlock;
|
|
*OutputParameterBlockSize = SwapBytes32 (Header->paramSize);
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
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.
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
Tpm2RequestUseTpm (
|
|
VOID
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
|
|
if (mTcg2Protocol == NULL) {
|
|
Status = gBS->LocateProtocol (&gEfiTcg2ProtocolGuid, NULL, (VOID **) &mTcg2Protocol);
|
|
if (EFI_ERROR (Status)) {
|
|
//
|
|
// Tcg2 protocol is not installed. So, TPM2 is not present.
|
|
//
|
|
DEBUG ((EFI_D_ERROR, "Tpm2RequestUseTpm - Tcg2 - %r\n", Status));
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
}
|
|
//
|
|
// Assume when Tcg2 Protocol is ready, RequestUseTpm already done.
|
|
//
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
This service register TPM2 device.
|
|
|
|
@param Tpm2Device TPM2 device
|
|
|
|
@retval EFI_SUCCESS This TPM2 device is registered successfully.
|
|
@retval EFI_UNSUPPORTED System does not support register this TPM2 device.
|
|
@retval EFI_ALREADY_STARTED System already register this TPM2 device.
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
Tpm2RegisterTpm2DeviceLib (
|
|
IN TPM2_DEVICE_INTERFACE *Tpm2Device
|
|
)
|
|
{
|
|
return EFI_UNSUPPORTED;
|
|
}
|