/**
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] TcgData TCG_DXE_DATA structure.
@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, out] NewEventHdr Pointer to a TCG_PCR_EVENT_HDR data structure.
@param[in] NewEventData Pointer to the new event data.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES No enough memory to log the new event.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
**/
EFI_STATUS
EFIAPI
TcgDxeHashLogExtendEventI (
IN TCG_DXE_DATA *TcgData,
IN UINT8 *HashData,
IN UINT64 HashDataLen,
IN OUT TCG_PCR_EVENT_HDR *NewEventHdr,
IN UINT8 *NewEventData
)
{
EFI_STATUS Status;
if (HashDataLen > 0) {
Status = TpmCommHashAll (
HashData,
(UINTN) HashDataLen,
&NewEventHdr->Digest
);
ASSERT_EFI_ERROR (Status);
}
Status = TpmCommExtend (
TcgData->TpmHandle,
&NewEventHdr->Digest,
NewEventHdr->PCRIndex,
NULL
);
if (!EFI_ERROR (Status)) {
Status = TcgDxeLogEventI (TcgData, NewEventHdr, NewEventData);
}
return Status;
}
/**
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] TcgData TCG_DXE_DATA structure.
@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, out] NewEventHdr Pointer to a TCG_PCR_EVENT_HDR data structure.
@param[in] NewEventData Pointer to the new event data.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES No enough memory to log the new event.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
**/
EFI_STATUS
EFIAPI
TcgDxeHashLogExtendEventI (
IN TCG_DXE_DATA *TcgData,
IN UINT8 *HashData,
IN UINT64 HashDataLen,
IN OUT TCG_PCR_EVENT_HDR *NewEventHdr,
IN UINT8 *NewEventData
)
{
EFI_STATUS Status;
if (!TcgData->BsCap.TPMPresentFlag) {
return EFI_DEVICE_ERROR;
}
if (HashDataLen > 0 || HashData != NULL) {
Status = TpmCommHashAll (
HashData,
(UINTN) HashDataLen,
&NewEventHdr->Digest
);
if (EFI_ERROR(Status)) {
DEBUG ((DEBUG_ERROR, "TpmCommHashAll Failed. %x\n", Status));
goto Done;
}
}
Status = TpmCommExtend (
TcgData->TpmHandle,
&NewEventHdr->Digest,
NewEventHdr->PCRIndex,
NULL
);
if (!EFI_ERROR (Status)) {
Status = TcgDxeLogEventI (TcgData, NewEventHdr, NewEventData);
}
Done:
if ((Status == EFI_DEVICE_ERROR) || (Status == EFI_TIMEOUT)) {
DEBUG ((EFI_D_ERROR, "TcgDxeHashLogExtendEventI - %r. Disable TPM.\n", Status));
TcgData->BsCap.TPMPresentFlag = FALSE;
REPORT_STATUS_CODE (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
(PcdGet32 (PcdStatusCodeSubClassTpmDevice) | EFI_P_EC_INTERFACE_ERROR)
);
Status = EFI_DEVICE_ERROR;
}
return Status;
}
/**
Do a hash operation on a data buffer, extend a specific TPM PCR with the hash result,
and build a GUIDed HOB recording the event which will be passed to the DXE phase and
added into the Event Log.
@param[in] PeiServices Describes the list of possible PEI Services.
@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] TpmHandle TPM handle.
@param[in] NewEventHdr Pointer to a TCG_PCR_EVENT_HDR data structure.
@param[in] NewEventData Pointer to the new event data.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES No enough memory to log the new event.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
**/
EFI_STATUS
HashLogExtendEvent (
IN EFI_PEI_SERVICES **PeiServices,
IN UINT8 *HashData,
IN UINTN HashDataLen,
IN TIS_TPM_HANDLE TpmHandle,
IN TCG_PCR_EVENT_HDR *NewEventHdr,
IN UINT8 *NewEventData
)
{
EFI_STATUS Status;
VOID *HobData;
HobData = NULL;
if (HashDataLen != 0) {
Status = TpmCommHashAll (
HashData,
HashDataLen,
&NewEventHdr->Digest
);
ASSERT_EFI_ERROR (Status);
}
Status = TpmCommExtend (
PeiServices,
TpmHandle,
&NewEventHdr->Digest,
NewEventHdr->PCRIndex,
NULL
);
ASSERT_EFI_ERROR (Status);
HobData = BuildGuidHob (
&gTcgEventEntryHobGuid,
sizeof (*NewEventHdr) + NewEventHdr->EventSize
);
if (HobData == NULL) {
return EFI_OUT_OF_RESOURCES;
}
CopyMem (HobData, NewEventHdr, sizeof (*NewEventHdr));
HobData = (VOID *) ((UINT8*)HobData + sizeof (*NewEventHdr));
CopyMem (HobData, NewEventData, NewEventHdr->EventSize);
return EFI_SUCCESS;
}
/**
This service abstracts the capability to do a hash operation on a data buffer.
@param[in] This Indicates the calling context
@param[in] HashData Pointer to the data buffer to be hashed
@param[in] HashDataLen Length of the data buffer to be hashed
@param[in] AlgorithmId Identification of the Algorithm to use for the hashing operation
@param[in, out] HashedDataLen Resultant length of the hashed data
@param[in, out] HashedDataResult Resultant buffer of the hashed data
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_INVALID_PARAMETER HashDataLen is NULL.
@retval EFI_INVALID_PARAMETER HashDataLenResult is NULL.
@retval EFI_OUT_OF_RESOURCES Cannot allocate buffer of size *HashedDataLen.
@retval EFI_UNSUPPORTED AlgorithmId not supported.
@retval EFI_BUFFER_TOO_SMALL *HashedDataLen < sizeof (TCG_DIGEST).
**/
EFI_STATUS
EFIAPI
TcgDxeHashAll (
IN EFI_TCG_PROTOCOL *This,
IN UINT8 *HashData,
IN UINT64 HashDataLen,
IN TCG_ALGORITHM_ID AlgorithmId,
IN OUT UINT64 *HashedDataLen,
IN OUT UINT8 **HashedDataResult
)
{
if (HashedDataLen == NULL || HashedDataResult == NULL) {
return EFI_INVALID_PARAMETER;
}
switch (AlgorithmId) {
case TPM_ALG_SHA:
if (*HashedDataLen == 0) {
*HashedDataLen = sizeof (TPM_DIGEST);
*HashedDataResult = AllocatePool ((UINTN) *HashedDataLen);
if (*HashedDataResult == NULL) {
return EFI_OUT_OF_RESOURCES;
}
}
if (*HashedDataLen < sizeof (TPM_DIGEST)) {
*HashedDataLen = sizeof (TPM_DIGEST);
return EFI_BUFFER_TOO_SMALL;
}
*HashedDataLen = sizeof (TPM_DIGEST);
if (*HashedDataResult == NULL) {
*HashedDataResult = AllocatePool ((UINTN) *HashedDataLen);
}
return TpmCommHashAll (
HashData,
(UINTN) HashDataLen,
(TPM_DIGEST*)*HashedDataResult
);
default:
return EFI_UNSUPPORTED;
}
}
/**
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] TcgData TCG_DXE_DATA structure.
@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, out] NewEventHdr Pointer to a TCG_PCR_EVENT_HDR data structure.
@param[in] NewEventData Pointer to the new event data.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES No enough memory to log the new event.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
**/
EFI_STATUS
EFIAPI
TcgDxeHashLogExtendEventI (
IN TCG_DXE_DATA *TcgData,
IN UINT8 *HashData,
IN UINT64 HashDataLen,
IN OUT TCG_PCR_EVENT_HDR *NewEventHdr,
IN UINT8 *NewEventData
)
{
EFI_STATUS Status;
if (HashData == NULL && HashDataLen > 0) {
return EFI_INVALID_PARAMETER;
}
if (HashDataLen > 0 || HashData != NULL) {
Status = TpmCommHashAll (
HashData,
(UINTN) HashDataLen,
&NewEventHdr->Digest
);
if (EFI_ERROR(Status)) {
DEBUG ((DEBUG_ERROR, "TpmCommHashAll Failed. %x\n", Status));
return Status;
}
}
Status = TpmCommExtend (
TcgData->TpmHandle,
&NewEventHdr->Digest,
NewEventHdr->PCRIndex,
NULL
);
if (!EFI_ERROR (Status)) {
Status = TcgDxeLogEventI (TcgData, NewEventHdr, NewEventData);
}
return Status;
}
/**
Do a hash operation on a data buffer, extend a specific TPM PCR with the hash result,
and build a GUIDed HOB recording the event which will be passed to the DXE phase and
added into the Event Log.
@param[in] PeiServices Describes the list of possible PEI Services.
@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] NewEventHdr Pointer to a TCG_PCR_EVENT_HDR data structure.
@param[in] NewEventData Pointer to the new event data.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES No enough memory to log the new event.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
**/
EFI_STATUS
HashLogExtendEvent (
IN EFI_PEI_SERVICES **PeiServices,
IN UINT8 *HashData,
IN UINTN HashDataLen,
IN TCG_PCR_EVENT_HDR *NewEventHdr,
IN UINT8 *NewEventData
)
{
EFI_STATUS Status;
VOID *HobData;
if (GetFirstGuidHob (&gTpmErrorHobGuid) != NULL) {
return EFI_DEVICE_ERROR;
}
HobData = NULL;
if (HashDataLen != 0) {
Status = TpmCommHashAll (
HashData,
HashDataLen,
&NewEventHdr->Digest
);
if (EFI_ERROR (Status)) {
goto Done;
}
}
Status = Tpm12Extend (
&NewEventHdr->Digest,
NewEventHdr->PCRIndex,
NULL
);
if (EFI_ERROR (Status)) {
goto Done;
}
HobData = BuildGuidHob (
&gTcgEventEntryHobGuid,
sizeof (*NewEventHdr) + NewEventHdr->EventSize
);
if (HobData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
CopyMem (HobData, NewEventHdr, sizeof (*NewEventHdr));
HobData = (VOID *) ((UINT8*)HobData + sizeof (*NewEventHdr));
CopyMem (HobData, NewEventData, NewEventHdr->EventSize);
Done:
if ((Status == EFI_DEVICE_ERROR) || (Status == EFI_TIMEOUT)) {
DEBUG ((EFI_D_ERROR, "HashLogExtendEvent - %r. Disable TPM.\n", Status));
BuildGuidHob (&gTpmErrorHobGuid,0);
REPORT_STATUS_CODE (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
(PcdGet32 (PcdStatusCodeSubClassTpmDevice) | EFI_P_EC_INTERFACE_ERROR)
);
Status = EFI_DEVICE_ERROR;
}
return Status;
}
