/**
This service is a proxy for commands to the TPM.
@param[in] This Indicates the calling context
@param[in] TpmInputParameterBlockSize Size of the TPM input parameter block
@param[in] TpmInputParameterBlock Pointer to the TPM input parameter block
@param[in] TpmOutputParameterBlockSize Size of the TPM output parameter block
@param[in] TpmOutputParameterBlock Pointer to the TPM output parameter block
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_INVALID_PARAMETER Invalid ordinal.
@retval EFI_UNSUPPORTED Current Task Priority Level >= EFI_TPL_CALLBACK.
@retval EFI_TIMEOUT The TIS timed-out.
**/
EFI_STATUS
EFIAPI
TcgDxePassThroughToTpm (
IN EFI_TCG_PROTOCOL *This,
IN UINT32 TpmInputParameterBlockSize,
IN UINT8 *TpmInputParameterBlock,
IN UINT32 TpmOutputParameterBlockSize,
IN UINT8 *TpmOutputParameterBlock
)
{
TCG_DXE_DATA *TcgData;
if (TpmInputParameterBlock == NULL ||
TpmOutputParameterBlock == NULL ||
TpmInputParameterBlockSize == 0 ||
TpmOutputParameterBlockSize == 0) {
return EFI_INVALID_PARAMETER;
}
TcgData = TCG_DXE_DATA_FROM_THIS (This);
return TisPcExecute (
&(TcgData->TpmHandle),
"%r%/%r",
TpmInputParameterBlock,
(UINTN) TpmInputParameterBlockSize,
TpmOutputParameterBlock,
(UINTN) TpmOutputParameterBlockSize
);
}
/**
Extend a TPM PCR.
@param[in] TpmHandle TPM handle.
@param[in] DigestToExtend The 160 bit value representing the event to be recorded.
@param[in] PcrIndex The PCR to be updated.
@param[out] NewPcrValue New PCR value after extend.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
**/
EFI_STATUS
TpmCommExtend (
IN TIS_TPM_HANDLE TpmHandle,
IN TPM_DIGEST *DigestToExtend,
IN TPM_PCRINDEX PcrIndex,
OUT TPM_DIGEST *NewPcrValue
)
{
EFI_STATUS Status;
TPM_DIGEST NewValue;
TPM_RQU_COMMAND_HDR CmdHdr;
TPM_RSP_COMMAND_HDR RspHdr;
if (NewPcrValue == NULL) {
NewPcrValue = &NewValue;
}
CmdHdr.tag = TPM_TAG_RQU_COMMAND;
CmdHdr.paramSize =
sizeof (CmdHdr) + sizeof (PcrIndex) + sizeof (*DigestToExtend);
CmdHdr.ordinal = TPM_ORD_Extend;
Status = TisPcExecute (
TpmHandle,
"%h%d%r%/%h%r",
&CmdHdr,
PcrIndex,
DigestToExtend,
(UINTN)sizeof (*DigestToExtend),
&RspHdr,
NewPcrValue,
(UINTN)sizeof (*NewPcrValue)
);
if (EFI_ERROR (Status)) {
return Status;
}
if (RspHdr.returnCode != 0) {
return EFI_DEVICE_ERROR;
}
return EFI_SUCCESS;
}
/**
This service is a proxy for commands to the TPM.
@param[in] This Indicates the calling context
@param[in] TpmInputParameterBlockSize Size of the TPM input parameter block
@param[in] TpmInputParameterBlock Pointer to the TPM input parameter block
@param[in] TpmOutputParameterBlockSize Size of the TPM output parameter block
@param[in] TpmOutputParameterBlock Pointer to the TPM output parameter block
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_INVALID_PARAMETER Invalid ordinal.
@retval EFI_UNSUPPORTED Current Task Priority Level >= EFI_TPL_CALLBACK.
@retval EFI_TIMEOUT The TIS timed-out.
**/
EFI_STATUS
EFIAPI
TcgDxePassThroughToTpm (
IN EFI_TCG_PROTOCOL *This,
IN UINT32 TpmInputParameterBlockSize,
IN UINT8 *TpmInputParameterBlock,
IN UINT32 TpmOutputParameterBlockSize,
IN UINT8 *TpmOutputParameterBlock
)
{
TCG_DXE_DATA *TcgData;
TcgData = TCG_DXE_DATA_FROM_THIS (This);
return TisPcExecute (
TcgData->TpmHandle,
"%r%/%r",
TpmInputParameterBlock,
(UINTN) TpmInputParameterBlockSize,
TpmOutputParameterBlock,
(UINTN) TpmOutputParameterBlockSize
);
}
/**
Get TPM capability flags.
@param[in] TpmHandle TPM handle.
@param[in] FlagSubcap Flag subcap.
@param[out] FlagBuffer Pointer to the buffer for returned flag structure.
@param[in] FlagSize Size of the buffer.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
**/
EFI_STATUS
TpmCommGetFlags (
IN TIS_TPM_HANDLE TpmHandle,
IN UINT32 FlagSubcap,
OUT VOID *FlagBuffer,
IN UINTN FlagSize
)
{
EFI_STATUS Status;
TPM_RQU_COMMAND_HDR CmdHdr;
TPM_RSP_COMMAND_HDR RspHdr;
UINT32 Size;
CmdHdr.tag = TPM_TAG_RQU_COMMAND;
CmdHdr.paramSize = sizeof (CmdHdr) + sizeof (UINT32) * 3;
CmdHdr.ordinal = TPM_ORD_GetCapability;
Status = TisPcExecute (
TpmHandle,
"%h%d%d%d%/%h%d%r",
&CmdHdr,
TPM_CAP_FLAG,
sizeof (FlagSubcap),
FlagSubcap,
&RspHdr,
&Size,
FlagBuffer,
FlagSize
);
if (EFI_ERROR (Status)) {
return Status;
}
if (RspHdr.returnCode != 0) {
return EFI_DEVICE_ERROR;
}
return EFI_SUCCESS;
}
