/**
This service abstracts the capability to add an entry to the Event Log.
@param[in] This Indicates the calling context
@param[in] TCGLogData Pointer to the start of the data buffer containing
the TCG_PCR_EVENT data structure. All fields in
this structure are properly filled by the caller.
@param[in, out] EventNumber The event number of the event just logged
@param[in] Flags Indicate additional flags. Only one flag has been
defined at this time, which is 0x01 and means the
extend operation should not be performed. All
other bits are reserved.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES Insufficient memory in the event log to complete this action.
**/
EFI_STATUS
EFIAPI
TcgDxeLogEvent (
IN EFI_TCG_PROTOCOL *This,
IN TCG_PCR_EVENT *TCGLogData,
IN OUT UINT32 *EventNumber,
IN UINT32 Flags
)
{
TCG_DXE_DATA *TcgData;
if (TCGLogData == NULL){
return EFI_INVALID_PARAMETER;
}
TcgData = TCG_DXE_DATA_FROM_THIS (This);
if (TcgData->BsCap.TPMDeactivatedFlag || (!TcgData->BsCap.TPMPresentFlag)) {
return EFI_DEVICE_ERROR;
}
return TcgDxeLogEventI (
TcgData,
(TCG_PCR_EVENT_HDR*)TCGLogData,
TCGLogData->Event
);
}
/**
This service abstracts the capability to do a hash operation on a data buffer,
extend a specific TPM PCR with the hash result, and add an entry to the Event Log
@param[in] This Indicates the calling context
@param[in] HashData Physical address of the start of the data buffer
to be hashed, extended, and logged.
@param[in] HashDataLen The length, in bytes, of the buffer referenced by HashData
@param[in] AlgorithmId Identification of the Algorithm to use for the hashing operation
@param[in, out] TCGLogData The physical address of the start of the data
buffer containing the TCG_PCR_EVENT data structure.
@param[in, out] EventNumber The event number of the event just logged.
@param[out] EventLogLastEntry Physical address of the first byte of the entry
just placed in the Event Log. If the Event Log was
empty when this function was called then this physical
address will be the same as the physical address of
the start of the Event Log.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_UNSUPPORTED AlgorithmId != TPM_ALG_SHA.
@retval EFI_UNSUPPORTED Current TPL >= EFI_TPL_CALLBACK.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
**/
EFI_STATUS
EFIAPI
TcgDxeHashLogExtendEvent (
IN EFI_TCG_PROTOCOL *This,
IN EFI_PHYSICAL_ADDRESS HashData,
IN UINT64 HashDataLen,
IN TPM_ALGORITHM_ID AlgorithmId,
IN OUT TCG_PCR_EVENT *TCGLogData,
IN OUT UINT32 *EventNumber,
OUT EFI_PHYSICAL_ADDRESS *EventLogLastEntry
)
{
TCG_DXE_DATA *TcgData;
TcgData = TCG_DXE_DATA_FROM_THIS (This);
if (TcgData->BsCap.TPMDeactivatedFlag) {
return EFI_DEVICE_ERROR;
}
if (AlgorithmId != TPM_ALG_SHA) {
return EFI_UNSUPPORTED;
}
return TcgDxeHashLogExtendEventI (
TcgData,
(UINT8 *) (UINTN) HashData,
HashDataLen,
(TCG_PCR_EVENT_HDR*)TCGLogData,
TCGLogData->Event
);
}
/**
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
);
}
/**
This service abstracts the capability to do a hash operation on a data buffer,
extend a specific TPM PCR with the hash result, and add an entry to the Event Log
@param[in] This Indicates the calling context
@param[in] HashData Physical address of the start of the data buffer
to be hashed, extended, and logged.
@param[in] HashDataLen The length, in bytes, of the buffer referenced by HashData
@param[in] AlgorithmId Identification of the Algorithm to use for the hashing operation
@param[in, out] TCGLogData The physical address of the start of the data
buffer containing the TCG_PCR_EVENT data structure.
@param[in, out] EventNumber The event number of the event just logged.
@param[out] EventLogLastEntry Physical address of the first byte of the entry
just placed in the Event Log. If the Event Log was
empty when this function was called then this physical
address will be the same as the physical address of
the start of the Event Log.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_UNSUPPORTED AlgorithmId != TPM_ALG_SHA.
@retval EFI_UNSUPPORTED Current TPL >= EFI_TPL_CALLBACK.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
**/
EFI_STATUS
EFIAPI
TcgDxeHashLogExtendEvent (
IN EFI_TCG_PROTOCOL *This,
IN EFI_PHYSICAL_ADDRESS HashData,
IN UINT64 HashDataLen,
IN TPM_ALGORITHM_ID AlgorithmId,
IN OUT TCG_PCR_EVENT *TCGLogData,
IN OUT UINT32 *EventNumber,
OUT EFI_PHYSICAL_ADDRESS *EventLogLastEntry
)
{
TCG_DXE_DATA *TcgData;
EFI_STATUS Status;
if (TCGLogData == NULL || EventLogLastEntry == NULL){
return EFI_INVALID_PARAMETER;
}
TcgData = TCG_DXE_DATA_FROM_THIS (This);
if (TcgData->BsCap.TPMDeactivatedFlag || (!TcgData->BsCap.TPMPresentFlag)) {
return EFI_DEVICE_ERROR;
}
if (AlgorithmId != TPM_ALG_SHA) {
return EFI_UNSUPPORTED;
}
if (HashData == 0 && HashDataLen > 0) {
return EFI_INVALID_PARAMETER;
}
Status = TcgDxeHashLogExtendEventI (
TcgData,
(UINT8 *) (UINTN) HashData,
HashDataLen,
(TCG_PCR_EVENT_HDR*)TCGLogData,
TCGLogData->Event
);
if (!EFI_ERROR(Status)){
*EventLogLastEntry = (EFI_PHYSICAL_ADDRESS)(UINTN) TcgData->LastEvent;
}
return Status;
}
/**
This service provides EFI protocol capability information, state information
about the TPM, and Event Log state information.
@param[in] This Indicates the calling context
@param[out] ProtocolCapability The callee allocates memory for a TCG_BOOT_SERVICE_CAPABILITY
structure and fills in the fields with the EFI protocol
capability information and the current TPM state information.
@param[out] TCGFeatureFlags This is a pointer to the feature flags. No feature
flags are currently defined so this parameter
MUST be set to 0. However, in the future,
feature flags may be defined that, for example,
enable hash algorithm agility.
@param[out] EventLogLocation This is a pointer to the address of the event log in memory.
@param[out] EventLogLastEntry If the Event Log contains more than one entry,
this is a pointer to the address of the start of
the last entry in the event log in memory.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_INVALID_PARAMETER ProtocolCapability does not match TCG capability.
**/
EFI_STATUS
EFIAPI
TcgDxeStatusCheck (
IN EFI_TCG_PROTOCOL *This,
OUT TCG_EFI_BOOT_SERVICE_CAPABILITY *ProtocolCapability,
OUT UINT32 *TCGFeatureFlags,
OUT EFI_PHYSICAL_ADDRESS *EventLogLocation,
OUT EFI_PHYSICAL_ADDRESS *EventLogLastEntry
)
{
TCG_DXE_DATA *TcgData;
TcgData = TCG_DXE_DATA_FROM_THIS (This);
if (ProtocolCapability != NULL) {
*ProtocolCapability = TcgData->BsCap;
}
if (TCGFeatureFlags != NULL) {
*TCGFeatureFlags = 0;
}
if (EventLogLocation != NULL) {
if (PcdGet8 (PcdTpmPlatformClass) == TCG_PLATFORM_TYPE_CLIENT) {
*EventLogLocation = TcgData->TcgClientAcpiTable->Lasa;
} else {
*EventLogLocation = TcgData->TcgServerAcpiTable->Lasa;
}
}
if (EventLogLastEntry != NULL) {
if (TcgData->BsCap.TPMDeactivatedFlag || (!TcgData->BsCap.TPMPresentFlag)) {
*EventLogLastEntry = (EFI_PHYSICAL_ADDRESS)(UINTN)0;
} else {
*EventLogLastEntry = (EFI_PHYSICAL_ADDRESS)(UINTN)TcgData->LastEvent;
}
}
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
);
}
