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audk/OvmfPkg/Tcg/TdTcg2Dxe/TdTcg2Dxe.c

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/** @file
This module implements EFI TD Protocol.
Copyright (c) 2020 - 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiDxe.h>
#include <IndustryStandard/Acpi.h>
#include <IndustryStandard/PeImage.h>
#include <IndustryStandard/TcpaAcpi.h>
#include <Guid/GlobalVariable.h>
#include <Guid/HobList.h>
#include <Guid/EventGroup.h>
#include <Guid/EventExitBootServiceFailed.h>
#include <Guid/ImageAuthentication.h>
#include <Guid/TpmInstance.h>
#include <Protocol/DevicePath.h>
#include <Protocol/MpService.h>
#include <Protocol/VariableWrite.h>
#include <Protocol/Tcg2Protocol.h>
#include <Protocol/TrEEProtocol.h>
#include <Protocol/ResetNotification.h>
#include <Protocol/AcpiTable.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/HobLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/BaseLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/PrintLib.h>
#include <Library/PcdLib.h>
#include <Library/UefiLib.h>
#include <Library/HashLib.h>
#include <Library/PerformanceLib.h>
#include <Library/ReportStatusCodeLib.h>
#include <Library/TpmMeasurementLib.h>
#include <Protocol/CcMeasurement.h>
#include <Guid/CcEventHob.h>
#include <Library/TdxLib.h>
#define PERF_ID_CC_TCG2_DXE 0x3130
#define CC_EVENT_LOG_AREA_COUNT_MAX 1
#define CC_MR_INDEX_0_MRTD 0
#define CC_MR_INDEX_1_RTMR0 1
#define CC_MR_INDEX_2_RTMR1 2
#define CC_MR_INDEX_3_RTMR2 3
#define CC_MR_INDEX_INVALID 4
typedef struct {
CHAR16 *VariableName;
EFI_GUID *VendorGuid;
} VARIABLE_TYPE;
typedef struct {
EFI_GUID *EventGuid;
EFI_CC_EVENT_LOG_FORMAT LogFormat;
} CC_EVENT_INFO_STRUCT;
typedef struct {
EFI_CC_EVENT_LOG_FORMAT EventLogFormat;
EFI_PHYSICAL_ADDRESS Lasa;
UINT64 Laml;
UINTN EventLogSize;
UINT8 *LastEvent;
BOOLEAN EventLogStarted;
BOOLEAN EventLogTruncated;
UINTN Next800155EventOffset;
} CC_EVENT_LOG_AREA_STRUCT;
typedef struct _TDX_DXE_DATA {
EFI_CC_BOOT_SERVICE_CAPABILITY BsCap;
CC_EVENT_LOG_AREA_STRUCT EventLogAreaStruct[CC_EVENT_LOG_AREA_COUNT_MAX];
BOOLEAN GetEventLogCalled[CC_EVENT_LOG_AREA_COUNT_MAX];
CC_EVENT_LOG_AREA_STRUCT FinalEventLogAreaStruct[CC_EVENT_LOG_AREA_COUNT_MAX];
EFI_CC_FINAL_EVENTS_TABLE *FinalEventsTable[CC_EVENT_LOG_AREA_COUNT_MAX];
} TDX_DXE_DATA;
typedef struct {
TPMI_ALG_HASH HashAlgo;
UINT16 HashSize;
UINT32 HashMask;
} TDX_HASH_INFO;
//
//
CC_EVENT_INFO_STRUCT mCcEventInfo[] = {
{ &gCcEventEntryHobGuid, EFI_CC_EVENT_LOG_FORMAT_TCG_2 },
};
TDX_DXE_DATA mTdxDxeData = {
{
sizeof (EFI_CC_BOOT_SERVICE_CAPABILITY), // Size
{ 1, 1 }, // StructureVersion
{ 1, 1 }, // ProtocolVersion
EFI_CC_BOOT_HASH_ALG_SHA384, // HashAlgorithmBitmap
EFI_CC_EVENT_LOG_FORMAT_TCG_2, // SupportedEventLogs
{ 2, 0 } // {CC_TYPE, CC_SUBTYPE}
},
};
UINTN mBootAttempts = 0;
CHAR16 mBootVarName[] = L"BootOrder";
VARIABLE_TYPE mVariableType[] = {
{ EFI_SECURE_BOOT_MODE_NAME, &gEfiGlobalVariableGuid },
{ EFI_PLATFORM_KEY_NAME, &gEfiGlobalVariableGuid },
{ EFI_KEY_EXCHANGE_KEY_NAME, &gEfiGlobalVariableGuid },
{ EFI_IMAGE_SECURITY_DATABASE, &gEfiImageSecurityDatabaseGuid },
{ EFI_IMAGE_SECURITY_DATABASE1, &gEfiImageSecurityDatabaseGuid },
};
EFI_CC_EVENTLOG_ACPI_TABLE mTdxEventlogAcpiTemplate = {
{
EFI_CC_EVENTLOG_ACPI_TABLE_SIGNATURE,
sizeof (mTdxEventlogAcpiTemplate),
EFI_CC_EVENTLOG_ACPI_TABLE_REVISION,
//
// Compiler initializes the remaining bytes to 0
// These fields should be filled in production
//
},
{ EFI_CC_TYPE_TDX, 0 }, // CcType
0, // rsvd
0, // laml
0, // lasa
};
//
// Supported Hash list in Td guest.
// Currently SHA384 is supported.
//
TDX_HASH_INFO mHashInfo[] = {
{ TPM_ALG_SHA384, SHA384_DIGEST_SIZE, HASH_ALG_SHA384 }
};
/**
Get hash size based on Algo
@param[in] HashAlgo Hash Algorithm Id.
@return Size of the hash.
**/
UINT16
GetHashSizeFromAlgo (
IN TPMI_ALG_HASH HashAlgo
)
{
UINTN Index;
for (Index = 0; Index < sizeof (mHashInfo)/sizeof (mHashInfo[0]); Index++) {
if (mHashInfo[Index].HashAlgo == HashAlgo) {
return mHashInfo[Index].HashSize;
}
}
return 0;
}
/**
Get hash mask based on Algo
@param[in] HashAlgo Hash Algorithm Id.
@return Hash mask.
**/
UINT32
GetHashMaskFromAlgo (
IN TPMI_ALG_HASH HashAlgo
)
{
UINTN Index;
for (Index = 0; Index < ARRAY_SIZE (mHashInfo); Index++) {
if (mHashInfo[Index].HashAlgo == HashAlgo) {
return mHashInfo[Index].HashMask;
}
}
ASSERT (FALSE);
return 0;
}
/**
Copy TPML_DIGEST_VALUES into a buffer
@param[in,out] Buffer Buffer to hold copied TPML_DIGEST_VALUES compact binary.
@param[in] DigestList TPML_DIGEST_VALUES to be copied.
@param[in] HashAlgorithmMask HASH bits corresponding to the desired digests to copy.
@return The end of buffer to hold TPML_DIGEST_VALUES.
**/
VOID *
CopyDigestListToBuffer (
IN OUT VOID *Buffer,
IN TPML_DIGEST_VALUES *DigestList,
IN UINT32 HashAlgorithmMask
)
{
UINTN Index;
UINT16 DigestSize;
UINT32 DigestListCount;
UINT32 *DigestListCountPtr;
DigestListCountPtr = (UINT32 *)Buffer;
DigestListCount = 0;
Buffer = (UINT8 *)Buffer + sizeof (DigestList->count);
for (Index = 0; Index < DigestList->count; Index++) {
if ((DigestList->digests[Index].hashAlg & HashAlgorithmMask) == 0) {
DEBUG ((DEBUG_ERROR, "WARNING: TD Event log has HashAlg unsupported (0x%x)\n", DigestList->digests[Index].hashAlg));
continue;
}
CopyMem (Buffer, &DigestList->digests[Index].hashAlg, sizeof (DigestList->digests[Index].hashAlg));
Buffer = (UINT8 *)Buffer + sizeof (DigestList->digests[Index].hashAlg);
DigestSize = GetHashSizeFromAlgo (DigestList->digests[Index].hashAlg);
CopyMem (Buffer, &DigestList->digests[Index].digest, DigestSize);
Buffer = (UINT8 *)Buffer + DigestSize;
DigestListCount++;
}
WriteUnaligned32 (DigestListCountPtr, DigestListCount);
return Buffer;
}
EFI_HANDLE mImageHandle;
/**
Measure PE image into TPM log based on the authenticode image hashing in
PE/COFF Specification 8.0 Appendix A.
Caution: This function may receive untrusted input.
PE/COFF image is external input, so this function will validate its data structure
within this image buffer before use.
Notes: PE/COFF image is checked by BasePeCoffLib PeCoffLoaderGetImageInfo().
@param[in] RtmrIndex RTMR index
@param[in] ImageAddress Start address of image buffer.
@param[in] ImageSize Image size
@param[out] DigestList Digest list of this image.
@retval EFI_SUCCESS Successfully measure image.
@retval EFI_OUT_OF_RESOURCES No enough resource to measure image.
@retval other error value
**/
EFI_STATUS
MeasurePeImageAndExtend (
IN UINT32 RtmrIndex,
IN EFI_PHYSICAL_ADDRESS ImageAddress,
IN UINTN ImageSize,
OUT TPML_DIGEST_VALUES *DigestList
);
#define COLUME_SIZE (16 * 2)
/**
This function dump raw data.
@param Data raw data
@param Size raw data size
**/
VOID
InternalDumpData (
IN UINT8 *Data,
IN UINTN Size
)
{
UINTN Index;
for (Index = 0; Index < Size; Index++) {
DEBUG ((DEBUG_INFO, Index == COLUME_SIZE/2 ? " | %02x" : " %02x", (UINTN)Data[Index]));
}
}
/**
This function dump raw data with colume format.
@param Data raw data
@param Size raw data size
**/
VOID
InternalDumpHex (
IN UINT8 *Data,
IN UINTN Size
)
{
UINTN Index;
UINTN Count;
UINTN Left;
Count = Size / COLUME_SIZE;
Left = Size % COLUME_SIZE;
for (Index = 0; Index < Count; Index++) {
DEBUG ((DEBUG_INFO, "%04x: ", Index * COLUME_SIZE));
InternalDumpData (Data + Index * COLUME_SIZE, COLUME_SIZE);
DEBUG ((DEBUG_INFO, "\n"));
}
if (Left != 0) {
DEBUG ((DEBUG_INFO, "%04x: ", Index * COLUME_SIZE));
InternalDumpData (Data + Index * COLUME_SIZE, Left);
DEBUG ((DEBUG_INFO, "\n"));
}
}
/**
This function initialize TD_EVENT_HDR for EV_NO_ACTION
Event Type other than EFI Specification ID event. The behavior is defined
by TCG PC Client PFP Spec. Section 9.3.4 EV_NO_ACTION Event Types
@param[in, out] NoActionEvent Event Header of EV_NO_ACTION Event
@param[in] EventSize Event Size of the EV_NO_ACTION Event
**/
VOID
InitNoActionEvent (
IN OUT CC_EVENT_HDR *NoActionEvent,
IN UINT32 EventSize
)
{
UINT32 DigestListCount;
TPMI_ALG_HASH HashAlgId;
UINT8 *DigestBuffer;
DigestBuffer = (UINT8 *)NoActionEvent->Digests.digests;
DigestListCount = 0;
NoActionEvent->MrIndex = 0;
NoActionEvent->EventType = EV_NO_ACTION;
//
// Set Hash count & hashAlg accordingly, while Digest.digests[n].digest to all 0
//
ZeroMem (&NoActionEvent->Digests, sizeof (NoActionEvent->Digests));
if ((mTdxDxeData.BsCap.HashAlgorithmBitmap & EFI_CC_BOOT_HASH_ALG_SHA384) != 0) {
HashAlgId = TPM_ALG_SHA384;
CopyMem (DigestBuffer, &HashAlgId, sizeof (TPMI_ALG_HASH));
DigestBuffer += sizeof (TPMI_ALG_HASH) + GetHashSizeFromAlgo (HashAlgId);
DigestListCount++;
}
//
// Set Digests Count
//
WriteUnaligned32 ((UINT32 *)&NoActionEvent->Digests.count, DigestListCount);
//
// Set Event Size
//
WriteUnaligned32 ((UINT32 *)DigestBuffer, EventSize);
}
/**
Get All processors EFI_CPU_LOCATION in system. LocationBuf is allocated inside the function
Caller is responsible to free LocationBuf.
@param[out] LocationBuf Returns Processor Location Buffer.
@param[out] Num Returns processor number.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_UNSUPPORTED MpService protocol not found.
**/
EFI_STATUS
GetProcessorsCpuLocation (
OUT EFI_CPU_PHYSICAL_LOCATION **LocationBuf,
OUT UINTN *Num
)
{
EFI_STATUS Status;
EFI_MP_SERVICES_PROTOCOL *MpProtocol;
UINTN ProcessorNum;
UINTN EnabledProcessorNum;
EFI_PROCESSOR_INFORMATION ProcessorInfo;
EFI_CPU_PHYSICAL_LOCATION *ProcessorLocBuf;
UINTN Index;
Status = gBS->LocateProtocol (&gEfiMpServiceProtocolGuid, NULL, (VOID **)&MpProtocol);
if (EFI_ERROR (Status)) {
//
// MP protocol is not installed
//
return EFI_UNSUPPORTED;
}
Status = MpProtocol->GetNumberOfProcessors (
MpProtocol,
&ProcessorNum,
&EnabledProcessorNum
);
if (EFI_ERROR (Status)) {
return Status;
}
Status = gBS->AllocatePool (
EfiBootServicesData,
sizeof (EFI_CPU_PHYSICAL_LOCATION) * ProcessorNum,
(VOID **)&ProcessorLocBuf
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Get each processor Location info
//
for (Index = 0; Index < ProcessorNum; Index++) {
Status = MpProtocol->GetProcessorInfo (
MpProtocol,
Index,
&ProcessorInfo
);
if (EFI_ERROR (Status)) {
FreePool (ProcessorLocBuf);
return Status;
}
//
// Get all Processor Location info & measure
//
CopyMem (
&ProcessorLocBuf[Index],
&ProcessorInfo.Location,
sizeof (EFI_CPU_PHYSICAL_LOCATION)
);
}
*LocationBuf = ProcessorLocBuf;
*Num = ProcessorNum;
return Status;
}
/**
The EFI_CC_MEASUREMENT_PROTOCOL GetCapability function call provides protocol
capability information and state information.
@param[in] This Indicates the calling context
@param[in, out] ProtocolCapability The caller allocates memory for a EFI_CC_BOOT_SERVICE_CAPABILITY
structure and sets the size field to the size of the structure allocated.
The callee fills in the fields with the EFI protocol capability information
and the current EFI TCG2 state information up to the number of fields which
fit within the size of the structure passed in.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
The ProtocolCapability variable will not be populated.
@retval EFI_INVALID_PARAMETER One or more of the parameters are incorrect.
The ProtocolCapability variable will not be populated.
@retval EFI_BUFFER_TOO_SMALL The ProtocolCapability variable is too small to hold the full response.
It will be partially populated (required Size field will be set).
**/
EFI_STATUS
EFIAPI
TdGetCapability (
IN EFI_CC_MEASUREMENT_PROTOCOL *This,
IN OUT EFI_CC_BOOT_SERVICE_CAPABILITY *ProtocolCapability
)
{
DEBUG ((DEBUG_VERBOSE, "TdGetCapability\n"));
if ((This == NULL) || (ProtocolCapability == NULL)) {
return EFI_INVALID_PARAMETER;
}
CopyMem (ProtocolCapability, &mTdxDxeData.BsCap, sizeof (EFI_CC_BOOT_SERVICE_CAPABILITY));
return EFI_SUCCESS;
}
/**
This function dump PCR event.
TD Event log reuse the TCG PCR Event spec.
The first event in the event log is the SHA1 log format.
There is only ONE TCG_PCR_EVENT in TD Event log.
@param[in] EventHdr TCG PCR event structure.
**/
VOID
DumpPcrEvent (
IN TCG_PCR_EVENT_HDR *EventHdr
)
{
UINTN Index;
DEBUG ((DEBUG_INFO, " Event:\n"));
DEBUG ((DEBUG_INFO, " MrIndex - %d\n", EventHdr->PCRIndex));
DEBUG ((DEBUG_INFO, " EventType - 0x%08x\n", EventHdr->EventType));
DEBUG ((DEBUG_INFO, " Digest - "));
for (Index = 0; Index < sizeof (TCG_DIGEST); Index++) {
DEBUG ((DEBUG_INFO, "%02x ", EventHdr->Digest.digest[Index]));
}
DEBUG ((DEBUG_INFO, "\n"));
DEBUG ((DEBUG_INFO, " EventSize - 0x%08x\n", EventHdr->EventSize));
InternalDumpHex ((UINT8 *)(EventHdr + 1), EventHdr->EventSize);
}
/**
This function dump TCG_EfiSpecIDEventStruct.
@param[in] TcgEfiSpecIdEventStruct A pointer to TCG_EfiSpecIDEventStruct.
**/
VOID
DumpTcgEfiSpecIdEventStruct (
IN TCG_EfiSpecIDEventStruct *TcgEfiSpecIdEventStruct
)
{
TCG_EfiSpecIdEventAlgorithmSize *DigestSize;
UINTN Index;
UINT8 *VendorInfoSize;
UINT8 *VendorInfo;
UINT32 NumberOfAlgorithms;
DEBUG ((DEBUG_INFO, " TCG_EfiSpecIDEventStruct:\n"));
DEBUG ((DEBUG_INFO, " signature - '"));
for (Index = 0; Index < sizeof (TcgEfiSpecIdEventStruct->signature); Index++) {
DEBUG ((DEBUG_INFO, "%c", TcgEfiSpecIdEventStruct->signature[Index]));
}
DEBUG ((DEBUG_INFO, "'\n"));
DEBUG ((DEBUG_INFO, " platformClass - 0x%08x\n", TcgEfiSpecIdEventStruct->platformClass));
DEBUG ((DEBUG_INFO, " specVersion - %d.%d%d\n", TcgEfiSpecIdEventStruct->specVersionMajor, TcgEfiSpecIdEventStruct->specVersionMinor, TcgEfiSpecIdEventStruct->specErrata));
DEBUG ((DEBUG_INFO, " uintnSize - 0x%02x\n", TcgEfiSpecIdEventStruct->uintnSize));
CopyMem (&NumberOfAlgorithms, TcgEfiSpecIdEventStruct + 1, sizeof (NumberOfAlgorithms));
DEBUG ((DEBUG_INFO, " NumberOfAlgorithms - 0x%08x\n", NumberOfAlgorithms));
DigestSize = (TCG_EfiSpecIdEventAlgorithmSize *)((UINT8 *)TcgEfiSpecIdEventStruct + sizeof (*TcgEfiSpecIdEventStruct) + sizeof (NumberOfAlgorithms));
for (Index = 0; Index < NumberOfAlgorithms; Index++) {
DEBUG ((DEBUG_INFO, " digest(%d)\n", Index));
DEBUG ((DEBUG_INFO, " algorithmId - 0x%04x\n", DigestSize[Index].algorithmId));
DEBUG ((DEBUG_INFO, " digestSize - 0x%04x\n", DigestSize[Index].digestSize));
}
VendorInfoSize = (UINT8 *)&DigestSize[NumberOfAlgorithms];
DEBUG ((DEBUG_INFO, " VendorInfoSize - 0x%02x\n", *VendorInfoSize));
VendorInfo = VendorInfoSize + 1;
DEBUG ((DEBUG_INFO, " VendorInfo - "));
for (Index = 0; Index < *VendorInfoSize; Index++) {
DEBUG ((DEBUG_INFO, "%02x ", VendorInfo[Index]));
}
DEBUG ((DEBUG_INFO, "\n"));
}
/**
This function get size of TCG_EfiSpecIDEventStruct.
@param[in] TcgEfiSpecIdEventStruct A pointer to TCG_EfiSpecIDEventStruct.
**/
UINTN
GetTcgEfiSpecIdEventStructSize (
IN TCG_EfiSpecIDEventStruct *TcgEfiSpecIdEventStruct
)
{
TCG_EfiSpecIdEventAlgorithmSize *DigestSize;
UINT8 *VendorInfoSize;
UINT32 NumberOfAlgorithms;
CopyMem (&NumberOfAlgorithms, TcgEfiSpecIdEventStruct + 1, sizeof (NumberOfAlgorithms));
DigestSize = (TCG_EfiSpecIdEventAlgorithmSize *)((UINT8 *)TcgEfiSpecIdEventStruct + sizeof (*TcgEfiSpecIdEventStruct) + sizeof (NumberOfAlgorithms));
VendorInfoSize = (UINT8 *)&DigestSize[NumberOfAlgorithms];
return sizeof (TCG_EfiSpecIDEventStruct) + sizeof (UINT32) + (NumberOfAlgorithms * sizeof (TCG_EfiSpecIdEventAlgorithmSize)) + sizeof (UINT8) + (*VendorInfoSize);
}
/**
This function dump TD Event (including the Digests).
@param[in] CcEvent TD Event structure.
**/
VOID
DumpCcEvent (
IN CC_EVENT *CcEvent
)
{
UINT32 DigestIndex;
UINT32 DigestCount;
TPMI_ALG_HASH HashAlgo;
UINT32 DigestSize;
UINT8 *DigestBuffer;
UINT32 EventSize;
UINT8 *EventBuffer;
DEBUG ((DEBUG_INFO, "Cc Event:\n"));
DEBUG ((DEBUG_INFO, " MrIndex - %d\n", CcEvent->MrIndex));
DEBUG ((DEBUG_INFO, " EventType - 0x%08x\n", CcEvent->EventType));
DEBUG ((DEBUG_INFO, " DigestCount: 0x%08x\n", CcEvent->Digests.count));
DigestCount = CcEvent->Digests.count;
HashAlgo = CcEvent->Digests.digests[0].hashAlg;
DigestBuffer = (UINT8 *)&CcEvent->Digests.digests[0].digest;
for (DigestIndex = 0; DigestIndex < DigestCount; DigestIndex++) {
DEBUG ((DEBUG_INFO, " HashAlgo : 0x%04x\n", HashAlgo));
DEBUG ((DEBUG_INFO, " Digest(%d): \n", DigestIndex));
DigestSize = GetHashSizeFromAlgo (HashAlgo);
InternalDumpHex (DigestBuffer, DigestSize);
//
// Prepare next
//
CopyMem (&HashAlgo, DigestBuffer + DigestSize, sizeof (TPMI_ALG_HASH));
DigestBuffer = DigestBuffer + DigestSize + sizeof (TPMI_ALG_HASH);
}
DigestBuffer = DigestBuffer - sizeof (TPMI_ALG_HASH);
CopyMem (&EventSize, DigestBuffer, sizeof (CcEvent->EventSize));
DEBUG ((DEBUG_INFO, " EventSize - 0x%08x\n", EventSize));
EventBuffer = DigestBuffer + sizeof (CcEvent->EventSize);
InternalDumpHex (EventBuffer, EventSize);
DEBUG ((DEBUG_INFO, "\n"));
}
/**
This function returns size of Td Table event.
@param[in] CcEvent Td Table event structure.
@return size of Td event.
**/
UINTN
GetCcEventSize (
IN CC_EVENT *CcEvent
)
{
UINT32 DigestIndex;
UINT32 DigestCount;
TPMI_ALG_HASH HashAlgo;
UINT32 DigestSize;
UINT8 *DigestBuffer;
UINT32 EventSize;
UINT8 *EventBuffer;
DigestCount = CcEvent->Digests.count;
HashAlgo = CcEvent->Digests.digests[0].hashAlg;
DigestBuffer = (UINT8 *)&CcEvent->Digests.digests[0].digest;
for (DigestIndex = 0; DigestIndex < DigestCount; DigestIndex++) {
DigestSize = GetHashSizeFromAlgo (HashAlgo);
//
// Prepare next
//
CopyMem (&HashAlgo, DigestBuffer + DigestSize, sizeof (TPMI_ALG_HASH));
DigestBuffer = DigestBuffer + DigestSize + sizeof (TPMI_ALG_HASH);
}
DigestBuffer = DigestBuffer - sizeof (TPMI_ALG_HASH);
CopyMem (&EventSize, DigestBuffer, sizeof (CcEvent->EventSize));
EventBuffer = DigestBuffer + sizeof (CcEvent->EventSize);
return (UINTN)EventBuffer + EventSize - (UINTN)CcEvent;
}
/**
This function dump CC event log.
TDVF only supports EFI_CC_EVENT_LOG_FORMAT_TCG_2
@param[in] EventLogFormat The type of the event log for which the information is requested.
@param[in] EventLogLocation A pointer to the memory address of the event log.
@param[in] 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.
@param[in] FinalEventsTable A pointer to the memory address of the final event table.
**/
VOID
DumpCcEventLog (
IN EFI_CC_EVENT_LOG_FORMAT EventLogFormat,
IN EFI_PHYSICAL_ADDRESS EventLogLocation,
IN EFI_PHYSICAL_ADDRESS EventLogLastEntry,
IN EFI_CC_FINAL_EVENTS_TABLE *FinalEventsTable
)
{
TCG_PCR_EVENT_HDR *EventHdr;
CC_EVENT *CcEvent;
TCG_EfiSpecIDEventStruct *TcgEfiSpecIdEventStruct;
UINTN NumberOfEvents;
DEBUG ((DEBUG_INFO, "EventLogFormat: (0x%x)\n", EventLogFormat));
ASSERT (EventLogFormat == EFI_CC_EVENT_LOG_FORMAT_TCG_2);
//
// Dump first event.
// The first event is always the TCG_PCR_EVENT_HDR
// After this event is a TCG_EfiSpecIDEventStruct
//
EventHdr = (TCG_PCR_EVENT_HDR *)(UINTN)EventLogLocation;
DumpPcrEvent (EventHdr);
TcgEfiSpecIdEventStruct = (TCG_EfiSpecIDEventStruct *)(EventHdr + 1);
DumpTcgEfiSpecIdEventStruct (TcgEfiSpecIdEventStruct);
//
// Then the CcEvent (Its structure is similar to TCG_PCR_EVENT2)
//
CcEvent = (CC_EVENT *)((UINTN)TcgEfiSpecIdEventStruct + GetTcgEfiSpecIdEventStructSize (TcgEfiSpecIdEventStruct));
while ((UINTN)CcEvent <= EventLogLastEntry) {
DumpCcEvent (CcEvent);
CcEvent = (CC_EVENT *)((UINTN)CcEvent + GetCcEventSize (CcEvent));
}
if (FinalEventsTable == NULL) {
DEBUG ((DEBUG_INFO, "FinalEventsTable: NOT FOUND\n"));
} else {
DEBUG ((DEBUG_INFO, "FinalEventsTable: (0x%x)\n", FinalEventsTable));
DEBUG ((DEBUG_INFO, " Version: (0x%x)\n", FinalEventsTable->Version));
DEBUG ((DEBUG_INFO, " NumberOfEvents: (0x%x)\n", FinalEventsTable->NumberOfEvents));
CcEvent = (CC_EVENT *)(UINTN)(FinalEventsTable + 1);
for (NumberOfEvents = 0; NumberOfEvents < FinalEventsTable->NumberOfEvents; NumberOfEvents++) {
DumpCcEvent (CcEvent);
CcEvent = (CC_EVENT *)((UINTN)CcEvent + GetCcEventSize (CcEvent));
}
}
return;
}
/**
The EFI_CC_MEASUREMENT_PROTOCOL Get Event Log function call allows a caller to
retrieve the address of a given event log and its last entry.
@param[in] This Indicates the calling context
@param[in] EventLogFormat The type of the event log for which the information is requested.
@param[out] EventLogLocation A pointer to the memory address of the event log.
@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.
@param[out] EventLogTruncated If the Event Log is missing at least one entry because an event would
have exceeded the area allocated for events, this value is set to TRUE.
Otherwise, the value will be FALSE and the Event Log will be complete.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_INVALID_PARAMETER One or more of the parameters are incorrect
(e.g. asking for an event log whose format is not supported).
**/
EFI_STATUS
EFIAPI
TdGetEventLog (
IN EFI_CC_MEASUREMENT_PROTOCOL *This,
IN EFI_CC_EVENT_LOG_FORMAT EventLogFormat,
OUT EFI_PHYSICAL_ADDRESS *EventLogLocation,
OUT EFI_PHYSICAL_ADDRESS *EventLogLastEntry,
OUT BOOLEAN *EventLogTruncated
)
{
UINTN Index = 0;
DEBUG ((DEBUG_INFO, "TdGetEventLog ... (0x%x)\n", EventLogFormat));
ASSERT (EventLogFormat == EFI_CC_EVENT_LOG_FORMAT_TCG_2);
if (EventLogLocation != NULL) {
*EventLogLocation = mTdxDxeData.EventLogAreaStruct[Index].Lasa;
DEBUG ((DEBUG_INFO, "TdGetEventLog (EventLogLocation - %x)\n", *EventLogLocation));
}
if (EventLogLastEntry != NULL) {
if (!mTdxDxeData.EventLogAreaStruct[Index].EventLogStarted) {
*EventLogLastEntry = (EFI_PHYSICAL_ADDRESS)(UINTN)0;
} else {
*EventLogLastEntry = (EFI_PHYSICAL_ADDRESS)(UINTN)mTdxDxeData.EventLogAreaStruct[Index].LastEvent;
}
DEBUG ((DEBUG_INFO, "TdGetEventLog (EventLogLastEntry - %x)\n", *EventLogLastEntry));
}
if (EventLogTruncated != NULL) {
*EventLogTruncated = mTdxDxeData.EventLogAreaStruct[Index].EventLogTruncated;
DEBUG ((DEBUG_INFO, "TdGetEventLog (EventLogTruncated - %x)\n", *EventLogTruncated));
}
DEBUG ((DEBUG_INFO, "TdGetEventLog - %r\n", EFI_SUCCESS));
// Dump Event Log for debug purpose
if ((EventLogLocation != NULL) && (EventLogLastEntry != NULL)) {
DumpCcEventLog (EventLogFormat, *EventLogLocation, *EventLogLastEntry, mTdxDxeData.FinalEventsTable[Index]);
}
//
// All events generated after the invocation of EFI_TCG2_GET_EVENT_LOG SHALL be stored
// in an instance of an EFI_CONFIGURATION_TABLE named by the VendorGuid of EFI_TCG2_FINAL_EVENTS_TABLE_GUID.
//
mTdxDxeData.GetEventLogCalled[Index] = TRUE;
return EFI_SUCCESS;
}
/**
Return if this is a Tcg800155PlatformIdEvent.
@param[in] NewEventHdr Pointer to a TCG_PCR_EVENT_HDR/TCG_PCR_EVENT_EX data structure.
@param[in] NewEventHdrSize New event header size.
@param[in] NewEventData Pointer to the new event data.
@param[in] NewEventSize New event data size.
@retval TRUE This is a Tcg800155PlatformIdEvent.
@retval FALSE This is NOT a Tcg800155PlatformIdEvent.
**/
BOOLEAN
Is800155Event (
IN VOID *NewEventHdr,
IN UINT32 NewEventHdrSize,
IN UINT8 *NewEventData,
IN UINT32 NewEventSize
)
{
if ((((TCG_PCR_EVENT2_HDR *)NewEventHdr)->EventType == EV_NO_ACTION) &&
(NewEventSize >= sizeof (TCG_Sp800_155_PlatformId_Event2)) &&
((CompareMem (
NewEventData,
TCG_Sp800_155_PlatformId_Event2_SIGNATURE,
sizeof (TCG_Sp800_155_PlatformId_Event2_SIGNATURE) - 1
) == 0) ||
(CompareMem (
NewEventData,
TCG_Sp800_155_PlatformId_Event3_SIGNATURE,
sizeof (TCG_Sp800_155_PlatformId_Event3_SIGNATURE) - 1
) == 0)))
{
return TRUE;
}
return FALSE;
}
/**
Add a new entry to the Event Log.
@param[in, out] EventLogAreaStruct The event log area data structure
@param[in] NewEventHdr Pointer to a TCG_PCR_EVENT_HDR/TCG_PCR_EVENT_EX data structure.
@param[in] NewEventHdrSize New event header size.
@param[in] NewEventData Pointer to the new event data.
@param[in] NewEventSize New event data size.
@retval EFI_SUCCESS The new event log entry was added.
@retval EFI_OUT_OF_RESOURCES No enough memory to log the new event.
**/
EFI_STATUS
TcgCommLogEvent (
IN OUT CC_EVENT_LOG_AREA_STRUCT *EventLogAreaStruct,
IN VOID *NewEventHdr,
IN UINT32 NewEventHdrSize,
IN UINT8 *NewEventData,
IN UINT32 NewEventSize
)
{
UINTN NewLogSize;
BOOLEAN Record800155Event;
CC_EVENT_HDR *CcEventHdr;
CcEventHdr = (CC_EVENT_HDR *)NewEventHdr;
DEBUG ((DEBUG_VERBOSE, "Td: Try to log event. Index = %d, EventType = 0x%x\n", CcEventHdr->MrIndex, CcEventHdr->EventType));
if (NewEventSize > MAX_ADDRESS - NewEventHdrSize) {
return EFI_OUT_OF_RESOURCES;
}
NewLogSize = NewEventHdrSize + NewEventSize;
if (NewLogSize > MAX_ADDRESS - EventLogAreaStruct->EventLogSize) {
return EFI_OUT_OF_RESOURCES;
}
if (NewLogSize + EventLogAreaStruct->EventLogSize > EventLogAreaStruct->Laml) {
DEBUG ((DEBUG_INFO, " Laml - 0x%x\n", EventLogAreaStruct->Laml));
DEBUG ((DEBUG_INFO, " NewLogSize - 0x%x\n", NewLogSize));
DEBUG ((DEBUG_INFO, " LogSize - 0x%x\n", EventLogAreaStruct->EventLogSize));
DEBUG ((DEBUG_INFO, "TcgCommLogEvent - %r\n", EFI_OUT_OF_RESOURCES));
return EFI_OUT_OF_RESOURCES;
}
//
// Check 800-155 event
// Record to 800-155 event offset only.
// If the offset is 0, no need to record.
//
Record800155Event = Is800155Event (NewEventHdr, NewEventHdrSize, NewEventData, NewEventSize);
if (Record800155Event) {
DEBUG ((DEBUG_INFO, "It is 800155Event.\n"));
if (EventLogAreaStruct->Next800155EventOffset != 0) {
CopyMem (
(UINT8 *)(UINTN)EventLogAreaStruct->Lasa + EventLogAreaStruct->Next800155EventOffset + NewLogSize,
(UINT8 *)(UINTN)EventLogAreaStruct->Lasa + EventLogAreaStruct->Next800155EventOffset,
EventLogAreaStruct->EventLogSize - EventLogAreaStruct->Next800155EventOffset
);
CopyMem (
(UINT8 *)(UINTN)EventLogAreaStruct->Lasa + EventLogAreaStruct->Next800155EventOffset,
NewEventHdr,
NewEventHdrSize
);
CopyMem (
(UINT8 *)(UINTN)EventLogAreaStruct->Lasa + EventLogAreaStruct->Next800155EventOffset + NewEventHdrSize,
NewEventData,
NewEventSize
);
EventLogAreaStruct->Next800155EventOffset += NewLogSize;
EventLogAreaStruct->LastEvent += NewLogSize;
EventLogAreaStruct->EventLogSize += NewLogSize;
}
return EFI_SUCCESS;
}
EventLogAreaStruct->LastEvent = (UINT8 *)(UINTN)EventLogAreaStruct->Lasa + EventLogAreaStruct->EventLogSize;
EventLogAreaStruct->EventLogSize += NewLogSize;
CopyMem (EventLogAreaStruct->LastEvent, NewEventHdr, NewEventHdrSize);
CopyMem (
EventLogAreaStruct->LastEvent + NewEventHdrSize,
NewEventData,
NewEventSize
);
return EFI_SUCCESS;
}
/**
According to UEFI Spec 2.10 Section 38.4.1:
The following table shows the TPM PCR index mapping and CC event log measurement
register index interpretation for Intel TDX, where MRTD means Trust Domain Measurement
Register and RTMR means Runtime Measurement Register
// TPM PCR Index | CC Measurement Register Index | TDX-measurement register
// ------------------------------------------------------------------------
// 0 | 0 | MRTD
// 1, 7 | 1 | RTMR[0]
// 2~6 | 2 | RTMR[1]
// 8~15 | 3 | RTMR[2]
@param[in] PCRIndex Index of the TPM PCR
@retval UINT32 Index of the CC Event Log Measurement Register Index
@retval CC_MR_INDEX_INVALID Invalid MR Index
**/
UINT32
EFIAPI
MapPcrToMrIndex (
IN UINT32 PCRIndex
)
{
UINT32 MrIndex;
if (PCRIndex > 15) {
ASSERT (FALSE);
return CC_MR_INDEX_INVALID;
}
MrIndex = 0;
if (PCRIndex == 0) {
MrIndex = CC_MR_INDEX_0_MRTD;
} else if ((PCRIndex == 1) || (PCRIndex == 7)) {
MrIndex = CC_MR_INDEX_1_RTMR0;
} else if ((PCRIndex >= 2) && (PCRIndex <= 6)) {
MrIndex = CC_MR_INDEX_2_RTMR1;
} else if ((PCRIndex >= 8) && (PCRIndex <= 15)) {
MrIndex = CC_MR_INDEX_3_RTMR2;
}
return MrIndex;
}
EFI_STATUS
EFIAPI
TdMapPcrToMrIndex (
IN EFI_CC_MEASUREMENT_PROTOCOL *This,
IN UINT32 PCRIndex,
OUT UINT32 *MrIndex
)
{
if (MrIndex == NULL) {
return EFI_INVALID_PARAMETER;
}
*MrIndex = MapPcrToMrIndex (PCRIndex);
return *MrIndex == CC_MR_INDEX_INVALID ? EFI_INVALID_PARAMETER : EFI_SUCCESS;
}
/**
Add a new entry to the Event Log.
@param[in] EventLogFormat The type of the event log for which the information is requested.
@param[in] NewEventHdr Pointer to a TCG_PCR_EVENT_HDR/TCG_PCR_EVENT_EX data structure.
@param[in] NewEventHdrSize New event header size.
@param[in] NewEventData Pointer to the new event data.
@param[in] NewEventSize New event data size.
@retval EFI_SUCCESS The new event log entry was added.
@retval EFI_OUT_OF_RESOURCES No enough memory to log the new event.
**/
EFI_STATUS
TdxDxeLogEvent (
IN EFI_CC_EVENT_LOG_FORMAT EventLogFormat,
IN VOID *NewEventHdr,
IN UINT32 NewEventHdrSize,
IN UINT8 *NewEventData,
IN UINT32 NewEventSize
)
{
EFI_STATUS Status;
UINTN Index;
CC_EVENT_LOG_AREA_STRUCT *EventLogAreaStruct;
if (EventLogFormat != EFI_CC_EVENT_LOG_FORMAT_TCG_2) {
ASSERT (FALSE);
return EFI_INVALID_PARAMETER;
}
Index = 0;
//
// Record to normal event log
//
EventLogAreaStruct = &mTdxDxeData.EventLogAreaStruct[Index];
if (EventLogAreaStruct->EventLogTruncated) {
return EFI_VOLUME_FULL;
}
Status = TcgCommLogEvent (
EventLogAreaStruct,
NewEventHdr,
NewEventHdrSize,
NewEventData,
NewEventSize
);
if (Status == EFI_OUT_OF_RESOURCES) {
EventLogAreaStruct->EventLogTruncated = TRUE;
return EFI_VOLUME_FULL;
} else if (Status == EFI_SUCCESS) {
EventLogAreaStruct->EventLogStarted = TRUE;
}
//
// If GetEventLog is called, record to FinalEventsTable, too.
//
if (mTdxDxeData.GetEventLogCalled[Index]) {
if (mTdxDxeData.FinalEventsTable[Index] == NULL) {
//
// no need for FinalEventsTable
//
return EFI_SUCCESS;
}
EventLogAreaStruct = &mTdxDxeData.FinalEventLogAreaStruct[Index];
if (EventLogAreaStruct->EventLogTruncated) {
return EFI_VOLUME_FULL;
}
Status = TcgCommLogEvent (
EventLogAreaStruct,
NewEventHdr,
NewEventHdrSize,
NewEventData,
NewEventSize
);
if (Status == EFI_OUT_OF_RESOURCES) {
EventLogAreaStruct->EventLogTruncated = TRUE;
return EFI_VOLUME_FULL;
} else if (Status == EFI_SUCCESS) {
EventLogAreaStruct->EventLogStarted = TRUE;
//
// Increase the NumberOfEvents in FinalEventsTable
//
(mTdxDxeData.FinalEventsTable[Index])->NumberOfEvents++;
DEBUG ((DEBUG_INFO, "FinalEventsTable->NumberOfEvents - 0x%x\n", (mTdxDxeData.FinalEventsTable[Index])->NumberOfEvents));
DEBUG ((DEBUG_INFO, " Size - 0x%x\n", (UINTN)EventLogAreaStruct->EventLogSize));
}
}
return Status;
}
/**
Get TPML_DIGEST_VALUES compact binary buffer size.
@param[in] DigestListBin TPML_DIGEST_VALUES compact binary buffer.
@return TPML_DIGEST_VALUES compact binary buffer size.
**/
UINT32
GetDigestListBinSize (
IN VOID *DigestListBin
)
{
UINTN Index;
UINT16 DigestSize;
UINT32 TotalSize;
UINT32 Count;
TPMI_ALG_HASH HashAlg;
Count = ReadUnaligned32 (DigestListBin);
TotalSize = sizeof (Count);
DigestListBin = (UINT8 *)DigestListBin + sizeof (Count);
for (Index = 0; Index < Count; Index++) {
HashAlg = ReadUnaligned16 (DigestListBin);
TotalSize += sizeof (HashAlg);
DigestListBin = (UINT8 *)DigestListBin + sizeof (HashAlg);
DigestSize = GetHashSizeFromAlgo (HashAlg);
TotalSize += DigestSize;
DigestListBin = (UINT8 *)DigestListBin + DigestSize;
}
return TotalSize;
}
/**
Copy TPML_DIGEST_VALUES compact binary into a buffer
@param[in,out] Buffer Buffer to hold copied TPML_DIGEST_VALUES compact binary.
@param[in] DigestListBin TPML_DIGEST_VALUES compact binary buffer.
@param[in] HashAlgorithmMask HASH bits corresponding to the desired digests to copy.
@param[out] HashAlgorithmMaskCopied Pointer to HASH bits corresponding to the digests copied.
@return The end of buffer to hold TPML_DIGEST_VALUES compact binary.
**/
VOID *
CopyDigestListBinToBuffer (
IN OUT VOID *Buffer,
IN VOID *DigestListBin,
IN UINT32 HashAlgorithmMask,
OUT UINT32 *HashAlgorithmMaskCopied
)
{
UINTN Index;
UINT16 DigestSize;
UINT32 Count;
TPMI_ALG_HASH HashAlg;
UINT32 DigestListCount;
UINT32 *DigestListCountPtr;
DigestListCountPtr = (UINT32 *)Buffer;
DigestListCount = 0;
*HashAlgorithmMaskCopied = 0;
Count = ReadUnaligned32 (DigestListBin);
Buffer = (UINT8 *)Buffer + sizeof (Count);
DigestListBin = (UINT8 *)DigestListBin + sizeof (Count);
for (Index = 0; Index < Count; Index++) {
HashAlg = ReadUnaligned16 (DigestListBin);
DigestListBin = (UINT8 *)DigestListBin + sizeof (HashAlg);
DigestSize = GetHashSizeFromAlgo (HashAlg);
if ((HashAlg & HashAlgorithmMask) != 0) {
CopyMem (Buffer, &HashAlg, sizeof (HashAlg));
Buffer = (UINT8 *)Buffer + sizeof (HashAlg);
CopyMem (Buffer, DigestListBin, DigestSize);
Buffer = (UINT8 *)Buffer + DigestSize;
DigestListCount++;
(*HashAlgorithmMaskCopied) |= GetHashMaskFromAlgo (HashAlg);
} else {
DEBUG ((DEBUG_ERROR, "WARNING: CopyDigestListBinToBuffer Event log has HashAlg unsupported by PCR bank (0x%x)\n", HashAlg));
}
DigestListBin = (UINT8 *)DigestListBin + DigestSize;
}
WriteUnaligned32 (DigestListCountPtr, DigestListCount);
return Buffer;
}
/**
Add a new entry to the Event Log. The call chain is like below:
TdxDxeLogHashEvent -> TdxDxeLogEvent -> TcgCommonLogEvent
Before this function is called, the event information (including the digest)
is ready.
@param[in] DigestList A list of digest.
@param[in,out] NewEventHdr Pointer to a TD_EVENT_HDR data structure.
@param[in] NewEventData Pointer to the new event data.
@retval EFI_SUCCESS The new event log entry was added.
@retval EFI_OUT_OF_RESOURCES No enough memory to log the new event.
**/
EFI_STATUS
TdxDxeLogHashEvent (
IN TPML_DIGEST_VALUES *DigestList,
IN OUT CC_EVENT_HDR *NewEventHdr,
IN UINT8 *NewEventData
)
{
EFI_STATUS Status;
EFI_TPL OldTpl;
EFI_STATUS RetStatus;
CC_EVENT CcEvent;
UINT8 *DigestBuffer;
UINT32 *EventSizePtr;
EFI_CC_EVENT_LOG_FORMAT LogFormat;
RetStatus = EFI_SUCCESS;
LogFormat = EFI_CC_EVENT_LOG_FORMAT_TCG_2;
ZeroMem (&CcEvent, sizeof (CcEvent));
CcEvent.MrIndex = NewEventHdr->MrIndex;
CcEvent.EventType = NewEventHdr->EventType;
DigestBuffer = (UINT8 *)&CcEvent.Digests;
EventSizePtr = CopyDigestListToBuffer (DigestBuffer, DigestList, HASH_ALG_SHA384);
CopyMem (EventSizePtr, &NewEventHdr->EventSize, sizeof (NewEventHdr->EventSize));
//
// Enter critical region
//
OldTpl = gBS->RaiseTPL (TPL_HIGH_LEVEL);
Status = TdxDxeLogEvent (
LogFormat,
&CcEvent,
sizeof (CcEvent.MrIndex) + sizeof (CcEvent.EventType) + GetDigestListBinSize (DigestBuffer) + sizeof (CcEvent.EventSize),
NewEventData,
NewEventHdr->EventSize
);
if (Status != EFI_SUCCESS) {
RetStatus = Status;
}
gBS->RestoreTPL (OldTpl);
return RetStatus;
}
/**
Do a hash operation on a data buffer, extend a specific RTMR with the hash result,
and add an entry to the Event Log.
@param[in] Flags Bitmap providing additional information.
@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 TD_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
TdxDxeHashLogExtendEvent (
IN UINT64 Flags,
IN UINT8 *HashData,
IN UINT64 HashDataLen,
IN OUT CC_EVENT_HDR *NewEventHdr,
IN UINT8 *NewEventData
)
{
EFI_STATUS Status;
TPML_DIGEST_VALUES DigestList;
CC_EVENT_HDR NoActionEvent;
if (NewEventHdr->EventType == EV_NO_ACTION) {
//
// Do not do RTMR extend for EV_NO_ACTION
//
Status = EFI_SUCCESS;
InitNoActionEvent (&NoActionEvent, NewEventHdr->EventSize);
if ((Flags & EFI_CC_FLAG_EXTEND_ONLY) == 0) {
Status = TdxDxeLogHashEvent (&(NoActionEvent.Digests), NewEventHdr, NewEventData);
}
return Status;
}
//
// According to UEFI Spec 2.10 Section 38.4.1 the mapping between MrIndex and Intel
// TDX Measurement Register is:
// MrIndex 0 <--> MRTD
// MrIndex 1-3 <--> RTMR[0-2]
// Only the RMTR registers can be extended in TDVF by HashAndExtend. So MrIndex will
// decreased by 1 before it is sent to HashAndExtend.
//
Status = HashAndExtend (
NewEventHdr->MrIndex - 1,
HashData,
(UINTN)HashDataLen,
&DigestList
);
if (!EFI_ERROR (Status)) {
if ((Flags & EFI_CC_FLAG_EXTEND_ONLY) == 0) {
Status = TdxDxeLogHashEvent (&DigestList, NewEventHdr, NewEventData);
}
}
return Status;
}
/**
The EFI_CC_MEASUREMENT_PROTOCOL HashLogExtendEvent function call provides callers with
an opportunity to extend and optionally log events without requiring
knowledge of actual TPM commands.
The extend operation will occur even if this function cannot create an event
log entry (e.g. due to the event log being full).
@param[in] This Indicates the calling context
@param[in] Flags Bitmap providing additional information.
@param[in] DataToHash Physical address of the start of the data buffer to be hashed.
@param[in] DataToHashLen The length in bytes of the buffer referenced by DataToHash.
@param[in] Event Pointer to data buffer containing information about the event.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
@retval EFI_VOLUME_FULL The extend operation occurred, but the event could not be written to one or more event logs.
@retval EFI_INVALID_PARAMETER One or more of the parameters are incorrect.
@retval EFI_UNSUPPORTED The PE/COFF image type is not supported.
**/
EFI_STATUS
EFIAPI
TdHashLogExtendEvent (
IN EFI_CC_MEASUREMENT_PROTOCOL *This,
IN UINT64 Flags,
IN EFI_PHYSICAL_ADDRESS DataToHash,
IN UINT64 DataToHashLen,
IN EFI_CC_EVENT *CcEvent
)
{
EFI_STATUS Status;
CC_EVENT_HDR NewEventHdr;
TPML_DIGEST_VALUES DigestList;
DEBUG ((DEBUG_VERBOSE, "TdHashLogExtendEvent ...\n"));
if ((This == NULL) || (CcEvent == NULL)) {
return EFI_INVALID_PARAMETER;
}
//
// Do not check hash data size for EV_NO_ACTION event.
//
if ((CcEvent->Header.EventType != EV_NO_ACTION) && (DataToHash == 0)) {
return EFI_INVALID_PARAMETER;
}
if (CcEvent->Size < CcEvent->Header.HeaderSize + sizeof (UINT32)) {
return EFI_INVALID_PARAMETER;
}
if (CcEvent->Header.MrIndex == CC_MR_INDEX_0_MRTD) {
DEBUG ((DEBUG_ERROR, "%a: MRTD cannot be extended in TDVF.\n", __func__));
return EFI_INVALID_PARAMETER;
}
if (CcEvent->Header.MrIndex >= CC_MR_INDEX_INVALID) {
DEBUG ((DEBUG_ERROR, "%a: MrIndex is invalid. (%d)\n", __func__, CcEvent->Header.MrIndex));
return EFI_INVALID_PARAMETER;
}
NewEventHdr.MrIndex = CcEvent->Header.MrIndex;
NewEventHdr.EventType = CcEvent->Header.EventType;
NewEventHdr.EventSize = CcEvent->Size - sizeof (UINT32) - CcEvent->Header.HeaderSize;
if ((Flags & EFI_CC_FLAG_PE_COFF_IMAGE) != 0) {
//
// According to UEFI Spec 2.10 Section 38.4.1 the mapping between MrIndex and Intel
// TDX Measurement Register is:
// MrIndex 0 <--> MRTD
// MrIndex 1-3 <--> RTMR[0-2]
// Only the RMTR registers can be extended in TDVF by HashAndExtend. So MrIndex will
// decreased by 1 before it is sent to MeasurePeImageAndExtend.
//
Status = MeasurePeImageAndExtend (
NewEventHdr.MrIndex - 1,
DataToHash,
(UINTN)DataToHashLen,
&DigestList
);
if (!EFI_ERROR (Status)) {
if ((Flags & EFI_CC_FLAG_EXTEND_ONLY) == 0) {
Status = TdxDxeLogHashEvent (&DigestList, &NewEventHdr, CcEvent->Event);
}
}
} else {
Status = TdxDxeHashLogExtendEvent (
Flags,
(UINT8 *)(UINTN)DataToHash,
DataToHashLen,
&NewEventHdr,
CcEvent->Event
);
}
DEBUG ((DEBUG_VERBOSE, "TdHashLogExtendEvent - %r\n", Status));
return Status;
}
EFI_CC_MEASUREMENT_PROTOCOL mTdProtocol = {
TdGetCapability,
TdGetEventLog,
TdHashLogExtendEvent,
TdMapPcrToMrIndex,
};
#define TD_HASH_COUNT 1
#define TEMP_BUF_LEN (sizeof(TCG_EfiSpecIDEventStruct) + sizeof(UINT32) \
+ (TD_HASH_COUNT * sizeof(TCG_EfiSpecIdEventAlgorithmSize)) + sizeof(UINT8))
/**
Initialize the TD Event Log and log events passed from the PEI phase.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES Out of memory.
**/
EFI_STATUS
SetupCcEventLog (
VOID
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS Lasa;
UINTN Index;
TCG_EfiSpecIDEventStruct *TcgEfiSpecIdEventStruct;
UINT8 TempBuf[TEMP_BUF_LEN];
TCG_PCR_EVENT_HDR SpecIdEvent;
TCG_EfiSpecIdEventAlgorithmSize *DigestSize;
TCG_EfiSpecIdEventAlgorithmSize *TempDigestSize;
UINT8 *VendorInfoSize;
UINT32 NumberOfAlgorithms;
EFI_CC_EVENT_LOG_FORMAT LogFormat;
EFI_PEI_HOB_POINTERS GuidHob;
CC_EVENT_HDR NoActionEvent;
Status = EFI_SUCCESS;
DEBUG ((DEBUG_INFO, "SetupCcEventLog\n"));
Index = 0;
LogFormat = EFI_CC_EVENT_LOG_FORMAT_TCG_2;
//
// 1. Create Log Area
//
mTdxDxeData.EventLogAreaStruct[Index].EventLogFormat = LogFormat;
// allocate pages for TD Event log
Status = gBS->AllocatePages (
AllocateAnyPages,
EfiACPIMemoryNVS,
EFI_SIZE_TO_PAGES (PcdGet32 (PcdTcgLogAreaMinLen)),
&Lasa
);
if (EFI_ERROR (Status)) {
return Status;
}
mTdxDxeData.EventLogAreaStruct[Index].Lasa = Lasa;
mTdxDxeData.EventLogAreaStruct[Index].Laml = PcdGet32 (PcdTcgLogAreaMinLen);
mTdxDxeData.EventLogAreaStruct[Index].Next800155EventOffset = 0;
//
// Report TD event log address and length, so that they can be reported in
// TD ACPI table. Ignore the return status, because those fields are optional.
//
PcdSet32S (PcdCcEventlogAcpiTableLaml, (UINT32)mTdxDxeData.EventLogAreaStruct[Index].Laml);
PcdSet64S (PcdCcEventlogAcpiTableLasa, mTdxDxeData.EventLogAreaStruct[Index].Lasa);
//
// To initialize them as 0xFF is recommended
// because the OS can know the last entry for that.
//
SetMem ((VOID *)(UINTN)Lasa, PcdGet32 (PcdTcgLogAreaMinLen), 0xFF);
//
// Create first entry for Log Header Entry Data
//
//
// TcgEfiSpecIdEventStruct
//
TcgEfiSpecIdEventStruct = (TCG_EfiSpecIDEventStruct *)TempBuf;
CopyMem (TcgEfiSpecIdEventStruct->signature, TCG_EfiSpecIDEventStruct_SIGNATURE_03, sizeof (TcgEfiSpecIdEventStruct->signature));
TcgEfiSpecIdEventStruct->platformClass = PcdGet8 (PcdTpmPlatformClass);
TcgEfiSpecIdEventStruct->specVersionMajor = TCG_EfiSpecIDEventStruct_SPEC_VERSION_MAJOR_TPM2;
TcgEfiSpecIdEventStruct->specVersionMinor = TCG_EfiSpecIDEventStruct_SPEC_VERSION_MINOR_TPM2;
TcgEfiSpecIdEventStruct->specErrata = TCG_EfiSpecIDEventStruct_SPEC_ERRATA_TPM2;
TcgEfiSpecIdEventStruct->uintnSize = sizeof (UINTN)/sizeof (UINT32);
NumberOfAlgorithms = 0;
DigestSize = (TCG_EfiSpecIdEventAlgorithmSize *)((UINT8 *)TcgEfiSpecIdEventStruct
+ sizeof (*TcgEfiSpecIdEventStruct)
+ sizeof (NumberOfAlgorithms));
TempDigestSize = DigestSize;
TempDigestSize += NumberOfAlgorithms;
TempDigestSize->algorithmId = TPM_ALG_SHA384;
TempDigestSize->digestSize = SHA384_DIGEST_SIZE;
NumberOfAlgorithms++;
CopyMem (TcgEfiSpecIdEventStruct + 1, &NumberOfAlgorithms, sizeof (NumberOfAlgorithms));
TempDigestSize = DigestSize;
TempDigestSize += NumberOfAlgorithms;
VendorInfoSize = (UINT8 *)TempDigestSize;
*VendorInfoSize = 0;
SpecIdEvent.PCRIndex = 1; // PCRIndex 0 maps to MrIndex 1
SpecIdEvent.EventType = EV_NO_ACTION;
ZeroMem (&SpecIdEvent.Digest, sizeof (SpecIdEvent.Digest));
SpecIdEvent.EventSize = (UINT32)GetTcgEfiSpecIdEventStructSize (TcgEfiSpecIdEventStruct);
//
// TD Event log re-use the spec of TCG2 Event log.
// Log TcgEfiSpecIdEventStruct as the first Event. Event format is TCG_PCR_EVENT.
// TCG EFI Protocol Spec. Section 5.3 Event Log Header
// TCG PC Client PFP spec. Section 9.2 Measurement Event Entries and Log
//
Status = TdxDxeLogEvent (
LogFormat,
&SpecIdEvent,
sizeof (SpecIdEvent),
(UINT8 *)TcgEfiSpecIdEventStruct,
SpecIdEvent.EventSize
);
//
// record the offset at the end of 800-155 event.
// the future 800-155 event can be inserted here.
//
mTdxDxeData.EventLogAreaStruct[Index].Next800155EventOffset = mTdxDxeData.EventLogAreaStruct[Index].EventLogSize;
//
// Tcg800155PlatformIdEvent. Event format is TCG_PCR_EVENT2
//
GuidHob.Guid = GetFirstGuidHob (&gTcg800155PlatformIdEventHobGuid);
while (GuidHob.Guid != NULL) {
InitNoActionEvent (&NoActionEvent, GET_GUID_HOB_DATA_SIZE (GuidHob.Guid));
Status = TdxDxeLogEvent (
LogFormat,
&NoActionEvent,
sizeof (NoActionEvent.MrIndex) + sizeof (NoActionEvent.EventType) + GetDigestListBinSize (&NoActionEvent.Digests) + sizeof (NoActionEvent.EventSize),
GET_GUID_HOB_DATA (GuidHob.Guid),
GET_GUID_HOB_DATA_SIZE (GuidHob.Guid)
);
GuidHob.Guid = GET_NEXT_HOB (GuidHob);
GuidHob.Guid = GetNextGuidHob (&gTcg800155PlatformIdEventHobGuid, GuidHob.Guid);
}
//
// 2. Create Final Log Area
//
Status = gBS->AllocatePages (
AllocateAnyPages,
EfiACPIMemoryNVS,
EFI_SIZE_TO_PAGES (PcdGet32 (PcdTcg2FinalLogAreaLen)),
&Lasa
);
if (EFI_ERROR (Status)) {
return Status;
}
SetMem ((VOID *)(UINTN)Lasa, PcdGet32 (PcdTcg2FinalLogAreaLen), 0xFF);
//
// Initialize
//
mTdxDxeData.FinalEventsTable[Index] = (VOID *)(UINTN)Lasa;
(mTdxDxeData.FinalEventsTable[Index])->Version = EFI_TCG2_FINAL_EVENTS_TABLE_VERSION;
(mTdxDxeData.FinalEventsTable[Index])->NumberOfEvents = 0;
mTdxDxeData.FinalEventLogAreaStruct[Index].EventLogFormat = LogFormat;
mTdxDxeData.FinalEventLogAreaStruct[Index].Lasa = Lasa + sizeof (EFI_CC_FINAL_EVENTS_TABLE);
mTdxDxeData.FinalEventLogAreaStruct[Index].Laml = PcdGet32 (PcdTcg2FinalLogAreaLen) - sizeof (EFI_CC_FINAL_EVENTS_TABLE);
mTdxDxeData.FinalEventLogAreaStruct[Index].EventLogSize = 0;
mTdxDxeData.FinalEventLogAreaStruct[Index].LastEvent = (VOID *)(UINTN)mTdxDxeData.FinalEventLogAreaStruct[Index].Lasa;
mTdxDxeData.FinalEventLogAreaStruct[Index].EventLogStarted = FALSE;
mTdxDxeData.FinalEventLogAreaStruct[Index].EventLogTruncated = FALSE;
mTdxDxeData.FinalEventLogAreaStruct[Index].Next800155EventOffset = 0;
//
// Install to configuration table for EFI_CC_EVENT_LOG_FORMAT_TCG_2
//
Status = gBS->InstallConfigurationTable (&gEfiCcFinalEventsTableGuid, (VOID *)mTdxDxeData.FinalEventsTable[Index]);
if (EFI_ERROR (Status)) {
return Status;
}
return Status;
}
/**
Measure and log an action string, and extend the measurement result into RTMR.
@param[in] MrIndex MrIndex to extend
@param[in] String A specific string that indicates an Action event.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
TdMeasureAction (
IN UINT32 MrIndex,
IN CHAR8 *String
)
{
CC_EVENT_HDR CcEvent;
CcEvent.MrIndex = MrIndex;
CcEvent.EventType = EV_EFI_ACTION;
CcEvent.EventSize = (UINT32)AsciiStrLen (String);
return TdxDxeHashLogExtendEvent (
0,
(UINT8 *)String,
CcEvent.EventSize,
&CcEvent,
(UINT8 *)String
);
}
/**
Measure and log EFI handoff tables, and extend the measurement result into PCR[1].
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
MeasureHandoffTables (
VOID
)
{
EFI_STATUS Status;
CC_EVENT_HDR CcEvent;
EFI_HANDOFF_TABLE_POINTERS HandoffTables;
UINTN ProcessorNum;
EFI_CPU_PHYSICAL_LOCATION *ProcessorLocBuf;
ProcessorLocBuf = NULL;
Status = EFI_SUCCESS;
if (PcdGet8 (PcdTpmPlatformClass) == TCG_PLATFORM_TYPE_SERVER) {
//
// Tcg Server spec.
// Measure each processor EFI_CPU_PHYSICAL_LOCATION with EV_TABLE_OF_DEVICES to PCR[1]
//
Status = GetProcessorsCpuLocation (&ProcessorLocBuf, &ProcessorNum);
if (!EFI_ERROR (Status)) {
CcEvent.MrIndex = MapPcrToMrIndex (1);
CcEvent.EventType = EV_TABLE_OF_DEVICES;
CcEvent.EventSize = sizeof (HandoffTables);
HandoffTables.NumberOfTables = 1;
HandoffTables.TableEntry[0].VendorGuid = gEfiMpServiceProtocolGuid;
HandoffTables.TableEntry[0].VendorTable = ProcessorLocBuf;
Status = TdxDxeHashLogExtendEvent (
0,
(UINT8 *)(UINTN)ProcessorLocBuf,
sizeof (EFI_CPU_PHYSICAL_LOCATION) * ProcessorNum,
&CcEvent,
(UINT8 *)&HandoffTables
);
FreePool (ProcessorLocBuf);
}
}
return Status;
}
/**
Measure and log Separator event, and extend the measurement result into a specific PCR.
@param[in] PCRIndex PCR index.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
MeasureSeparatorEvent (
IN UINT32 MrIndex
)
{
CC_EVENT_HDR CcEvent;
UINT32 EventData;
DEBUG ((DEBUG_INFO, "MeasureSeparatorEvent to Rtmr - %d\n", MrIndex));
EventData = 0;
CcEvent.MrIndex = MrIndex;
CcEvent.EventType = EV_SEPARATOR;
CcEvent.EventSize = (UINT32)sizeof (EventData);
return TdxDxeHashLogExtendEvent (
0,
(UINT8 *)&EventData,
sizeof (EventData),
&CcEvent,
(UINT8 *)&EventData
);
}
/**
Measure and log an EFI variable, and extend the measurement result into a specific RTMR.
@param[in] MrIndex RTMR Index.
@param[in] EventType Event type.
@param[in] VarName A Null-terminated string that is the name of the vendor's variable.
@param[in] VendorGuid A unique identifier for the vendor.
@param[in] VarData The content of the variable data.
@param[in] VarSize The size of the variable data.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES Out of memory.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
MeasureVariable (
IN UINT32 MrIndex,
IN TCG_EVENTTYPE EventType,
IN CHAR16 *VarName,
IN EFI_GUID *VendorGuid,
IN VOID *VarData,
IN UINTN VarSize
)
{
EFI_STATUS Status;
CC_EVENT_HDR CcEvent;
UINTN VarNameLength;
UEFI_VARIABLE_DATA *VarLog;
DEBUG ((DEBUG_INFO, "TdTcg2Dxe: MeasureVariable (Rtmr - %x, EventType - %x, ", (UINTN)MrIndex, (UINTN)EventType));
DEBUG ((DEBUG_INFO, "VariableName - %s, VendorGuid - %g)\n", VarName, VendorGuid));
VarNameLength = StrLen (VarName);
CcEvent.MrIndex = MrIndex;
CcEvent.EventType = EventType;
CcEvent.EventSize = (UINT32)(sizeof (*VarLog) + VarNameLength * sizeof (*VarName) + VarSize
- sizeof (VarLog->UnicodeName) - sizeof (VarLog->VariableData));
VarLog = (UEFI_VARIABLE_DATA *)AllocatePool (CcEvent.EventSize);
if (VarLog == NULL) {
return EFI_OUT_OF_RESOURCES;
}
VarLog->VariableName = *VendorGuid;
VarLog->UnicodeNameLength = VarNameLength;
VarLog->VariableDataLength = VarSize;
CopyMem (
VarLog->UnicodeName,
VarName,
VarNameLength * sizeof (*VarName)
);
if ((VarSize != 0) && (VarData != NULL)) {
CopyMem (
(CHAR16 *)VarLog->UnicodeName + VarNameLength,
VarData,
VarSize
);
}
if (EventType == EV_EFI_VARIABLE_DRIVER_CONFIG) {
//
// Digest is the event data (UEFI_VARIABLE_DATA)
//
Status = TdxDxeHashLogExtendEvent (
0,
(UINT8 *)VarLog,
CcEvent.EventSize,
&CcEvent,
(UINT8 *)VarLog
);
} else {
ASSERT (VarData != NULL);
Status = TdxDxeHashLogExtendEvent (
0,
(UINT8 *)VarData,
VarSize,
&CcEvent,
(UINT8 *)VarLog
);
}
FreePool (VarLog);
return Status;
}
/**
Read then Measure and log an EFI variable, and extend the measurement result into a specific RTMR.
@param[in] MrIndex RTMR Index.
@param[in] EventType Event type.
@param[in] VarName A Null-terminated string that is the name of the vendor's variable.
@param[in] VendorGuid A unique identifier for the vendor.
@param[out] VarSize The size of the variable data.
@param[out] VarData Pointer to the content of the variable.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES Out of memory.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
ReadAndMeasureVariable (
IN UINT32 MrIndex,
IN TCG_EVENTTYPE EventType,
IN CHAR16 *VarName,
IN EFI_GUID *VendorGuid,
OUT UINTN *VarSize,
OUT VOID **VarData
)
{
EFI_STATUS Status;
Status = GetVariable2 (VarName, VendorGuid, VarData, VarSize);
if (EventType == EV_EFI_VARIABLE_DRIVER_CONFIG) {
if (EFI_ERROR (Status)) {
//
// It is valid case, so we need handle it.
//
*VarData = NULL;
*VarSize = 0;
}
} else {
//
// if status error, VarData is freed and set NULL by GetVariable2
//
if (EFI_ERROR (Status)) {
return EFI_NOT_FOUND;
}
}
Status = MeasureVariable (
MrIndex,
EventType,
VarName,
VendorGuid,
*VarData,
*VarSize
);
return Status;
}
/**
Read then Measure and log an EFI boot variable, and extend the measurement result into PCR[1].
according to TCG PC Client PFP spec 0021 Section 2.4.4.2
@param[in] VarName A Null-terminated string that is the name of the vendor's variable.
@param[in] VendorGuid A unique identifier for the vendor.
@param[out] VarSize The size of the variable data.
@param[out] VarData Pointer to the content of the variable.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES Out of memory.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
ReadAndMeasureBootVariable (
IN CHAR16 *VarName,
IN EFI_GUID *VendorGuid,
OUT UINTN *VarSize,
OUT VOID **VarData
)
{
return ReadAndMeasureVariable (
MapPcrToMrIndex (1),
EV_EFI_VARIABLE_BOOT,
VarName,
VendorGuid,
VarSize,
VarData
);
}
/**
Read then Measure and log an EFI Secure variable, and extend the measurement result into PCR[7].
@param[in] VarName A Null-terminated string that is the name of the vendor's variable.
@param[in] VendorGuid A unique identifier for the vendor.
@param[out] VarSize The size of the variable data.
@param[out] VarData Pointer to the content of the variable.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES Out of memory.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
ReadAndMeasureSecureVariable (
IN CHAR16 *VarName,
IN EFI_GUID *VendorGuid,
OUT UINTN *VarSize,
OUT VOID **VarData
)
{
return ReadAndMeasureVariable (
MapPcrToMrIndex (7),
EV_EFI_VARIABLE_DRIVER_CONFIG,
VarName,
VendorGuid,
VarSize,
VarData
);
}
/**
Measure and log all EFI boot variables, and extend the measurement result into a specific PCR.
The EFI boot variables are BootOrder and Boot#### variables.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES Out of memory.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
MeasureAllBootVariables (
VOID
)
{
EFI_STATUS Status;
UINT16 *BootOrder;
UINTN BootCount;
UINTN Index;
VOID *BootVarData;
UINTN Size;
Status = ReadAndMeasureBootVariable (
mBootVarName,
&gEfiGlobalVariableGuid,
&BootCount,
(VOID **)&BootOrder
);
if ((Status == EFI_NOT_FOUND) || (BootOrder == NULL)) {
return EFI_SUCCESS;
}
if (EFI_ERROR (Status)) {
//
// BootOrder can't be NULL if status is not EFI_NOT_FOUND
//
FreePool (BootOrder);
return Status;
}
BootCount /= sizeof (*BootOrder);
for (Index = 0; Index < BootCount; Index++) {
UnicodeSPrint (mBootVarName, sizeof (mBootVarName), L"Boot%04x", BootOrder[Index]);
Status = ReadAndMeasureBootVariable (
mBootVarName,
&gEfiGlobalVariableGuid,
&Size,
&BootVarData
);
if (!EFI_ERROR (Status)) {
FreePool (BootVarData);
}
}
FreePool (BootOrder);
return EFI_SUCCESS;
}
/**
Measure and log all EFI Secure variables, and extend the measurement result into a specific PCR.
The EFI boot variables are BootOrder and Boot#### variables.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES Out of memory.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
MeasureAllSecureVariables (
VOID
)
{
EFI_STATUS Status;
VOID *Data;
UINTN DataSize;
UINTN Index;
Status = EFI_NOT_FOUND;
for (Index = 0; Index < sizeof (mVariableType)/sizeof (mVariableType[0]); Index++) {
Status = ReadAndMeasureSecureVariable (
mVariableType[Index].VariableName,
mVariableType[Index].VendorGuid,
&DataSize,
&Data
);
if (!EFI_ERROR (Status)) {
if (Data != NULL) {
FreePool (Data);
}
}
}
//
// Measure DBT if present and not empty
//
Status = GetVariable2 (EFI_IMAGE_SECURITY_DATABASE2, &gEfiImageSecurityDatabaseGuid, &Data, &DataSize);
if (!EFI_ERROR (Status)) {
Status = MeasureVariable (
MapPcrToMrIndex (7),
EV_EFI_VARIABLE_DRIVER_CONFIG,
EFI_IMAGE_SECURITY_DATABASE2,
&gEfiImageSecurityDatabaseGuid,
Data,
DataSize
);
FreePool (Data);
} else {
DEBUG ((DEBUG_INFO, "Skip measuring variable %s since it's deleted\n", EFI_IMAGE_SECURITY_DATABASE2));
}
return EFI_SUCCESS;
}
/**
Measure and log launch of FirmwareDebugger, and extend the measurement result into a specific PCR.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES Out of memory.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
MeasureLaunchOfFirmwareDebugger (
VOID
)
{
CC_EVENT_HDR CcEvent;
CcEvent.MrIndex = MapPcrToMrIndex (7);
CcEvent.EventType = EV_EFI_ACTION;
CcEvent.EventSize = sizeof (FIRMWARE_DEBUGGER_EVENT_STRING) - 1;
return TdxDxeHashLogExtendEvent (
0,
(UINT8 *)FIRMWARE_DEBUGGER_EVENT_STRING,
sizeof (FIRMWARE_DEBUGGER_EVENT_STRING) - 1,
&CcEvent,
(UINT8 *)FIRMWARE_DEBUGGER_EVENT_STRING
);
}
/**
Measure and log all Secure Boot Policy, and extend the measurement result into a specific PCR.
Platform firmware adhering to the policy must therefore measure the following values into PCR[7]: (in order listed)
- The contents of the SecureBoot variable
- The contents of the PK variable
- The contents of the KEK variable
- The contents of the EFI_IMAGE_SECURITY_DATABASE variable
- The contents of the EFI_IMAGE_SECURITY_DATABASE1 variable
- Separator
- Entries in the EFI_IMAGE_SECURITY_DATABASE that are used to validate EFI Drivers or EFI Boot Applications in the boot path
NOTE: Because of the above, UEFI variables PK, KEK, EFI_IMAGE_SECURITY_DATABASE,
EFI_IMAGE_SECURITY_DATABASE1 and SecureBoot SHALL NOT be measured into PCR[3].
@param[in] Event Event whose notification function is being invoked
@param[in] Context Pointer to the notification function's context
**/
VOID
EFIAPI
MeasureSecureBootPolicy (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EFI_STATUS Status;
VOID *Protocol;
Status = gBS->LocateProtocol (&gEfiVariableWriteArchProtocolGuid, NULL, (VOID **)&Protocol);
if (EFI_ERROR (Status)) {
return;
}
if (PcdGetBool (PcdFirmwareDebuggerInitialized)) {
Status = MeasureLaunchOfFirmwareDebugger ();
DEBUG ((DEBUG_INFO, "MeasureLaunchOfFirmwareDebugger - %r\n", Status));
}
Status = MeasureAllSecureVariables ();
DEBUG ((DEBUG_INFO, "MeasureAllSecureVariables - %r\n", Status));
//
// We need measure Separator(7) here, because this event must be between SecureBootPolicy (Configure)
// and ImageVerification (Authority)
// There might be a case that we need measure UEFI image from DriverOrder, besides BootOrder. So
// the Authority measurement happen before ReadToBoot event.
//
Status = MeasureSeparatorEvent (MapPcrToMrIndex (7));
DEBUG ((DEBUG_INFO, "MeasureSeparatorEvent - %r\n", Status));
return;
}
/**
Ready to Boot Event notification handler.
Sequence of OS boot events is measured in this event notification handler.
@param[in] Event Event whose notification function is being invoked
@param[in] Context Pointer to the notification function's context
**/
VOID
EFIAPI
OnReadyToBoot (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EFI_STATUS Status;
PERF_START_EX (mImageHandle, "EventRec", "TdTcg2Dxe", 0, PERF_ID_CC_TCG2_DXE);
if (mBootAttempts == 0) {
//
// Measure handoff tables.
//
Status = MeasureHandoffTables ();
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "HOBs not Measured. Error!\n"));
}
//
// Measure BootOrder & Boot#### variables.
//
Status = MeasureAllBootVariables ();
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Boot Variables not Measured. Error!\n"));
}
//
// 1. This is the first boot attempt.
//
Status = TdMeasureAction (
MapPcrToMrIndex (4),
EFI_CALLING_EFI_APPLICATION
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "%a not Measured. Error!\n", EFI_CALLING_EFI_APPLICATION));
}
//
// 2. Draw a line between pre-boot env and entering post-boot env.
// PCR[7] (is RTMR[0]) is already done.
//
Status = MeasureSeparatorEvent (1);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Separator Event not Measured. Error!\n"));
}
//
// 3. Measure GPT. It would be done in SAP driver.
//
//
// 4. Measure PE/COFF OS loader. It would be done in SAP driver.
//
//
// 5. Read & Measure variable. BootOrder already measured.
//
} else {
//
// 6. Not first attempt, meaning a return from last attempt
//
Status = TdMeasureAction (
MapPcrToMrIndex (4),
EFI_RETURNING_FROM_EFI_APPLICATION
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "%a not Measured. Error!\n", EFI_RETURNING_FROM_EFI_APPLICATION));
}
//
// 7. Next boot attempt, measure "Calling EFI Application from Boot Option" again
// TCG PC Client PFP spec Section 2.4.4.5 Step 4
//
Status = TdMeasureAction (
MapPcrToMrIndex (4),
EFI_CALLING_EFI_APPLICATION
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "%a not Measured. Error!\n", EFI_CALLING_EFI_APPLICATION));
}
}
DEBUG ((DEBUG_INFO, "TdTcg2Dxe Measure Data when ReadyToBoot\n"));
//
// Increase boot attempt counter.
//
mBootAttempts++;
PERF_END_EX (mImageHandle, "EventRec", "Tcg2Dxe", 0, PERF_ID_CC_TCG2_DXE + 1);
}
/**
Exit Boot Services Event notification handler.
Measure invocation and success of ExitBootServices.
@param[in] Event Event whose notification function is being invoked
@param[in] Context Pointer to the notification function's context
**/
VOID
EFIAPI
OnExitBootServices (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EFI_STATUS Status;
//
// Measure invocation of ExitBootServices,
//
Status = TdMeasureAction (
MapPcrToMrIndex (5),
EFI_EXIT_BOOT_SERVICES_INVOCATION
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "%a not Measured. Error!\n", EFI_EXIT_BOOT_SERVICES_INVOCATION));
}
//
// Measure success of ExitBootServices
//
Status = TdMeasureAction (
MapPcrToMrIndex (5),
EFI_EXIT_BOOT_SERVICES_SUCCEEDED
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "%a not Measured. Error!\n", EFI_EXIT_BOOT_SERVICES_SUCCEEDED));
}
}
/**
Exit Boot Services Failed Event notification handler.
Measure Failure of ExitBootServices.
@param[in] Event Event whose notification function is being invoked
@param[in] Context Pointer to the notification function's context
**/
VOID
EFIAPI
OnExitBootServicesFailed (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EFI_STATUS Status;
//
// Measure Failure of ExitBootServices,
//
Status = TdMeasureAction (
MapPcrToMrIndex (5),
EFI_EXIT_BOOT_SERVICES_FAILED
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "%a not Measured. Error!\n", EFI_EXIT_BOOT_SERVICES_FAILED));
}
}
EFI_STATUS
SyncCcEvent (
VOID
)
{
EFI_STATUS Status;
EFI_PEI_HOB_POINTERS GuidHob;
VOID *CcEvent;
VOID *DigestListBin;
UINT32 DigestListBinSize;
UINT8 *Event;
UINT32 EventSize;
EFI_CC_EVENT_LOG_FORMAT LogFormat;
DEBUG ((DEBUG_INFO, "Sync Cc event from SEC\n"));
Status = EFI_SUCCESS;
LogFormat = EFI_CC_EVENT_LOG_FORMAT_TCG_2;
GuidHob.Guid = GetFirstGuidHob (&gCcEventEntryHobGuid);
while (!EFI_ERROR (Status) && GuidHob.Guid != NULL) {
CcEvent = AllocateCopyPool (GET_GUID_HOB_DATA_SIZE (GuidHob.Guid), GET_GUID_HOB_DATA (GuidHob.Guid));
if (CcEvent == NULL) {
return EFI_OUT_OF_RESOURCES;
}
GuidHob.Guid = GET_NEXT_HOB (GuidHob);
GuidHob.Guid = GetNextGuidHob (&gCcEventEntryHobGuid, GuidHob.Guid);
DigestListBin = (UINT8 *)CcEvent + sizeof (UINT32) + sizeof (TCG_EVENTTYPE);
DigestListBinSize = GetDigestListBinSize (DigestListBin);
//
// Event size.
//
EventSize = *(UINT32 *)((UINT8 *)DigestListBin + DigestListBinSize);
Event = (UINT8 *)DigestListBin + DigestListBinSize + sizeof (UINT32);
//
// Log the event
//
Status = TdxDxeLogEvent (
LogFormat,
CcEvent,
sizeof (UINT32) + sizeof (TCG_EVENTTYPE) + DigestListBinSize + sizeof (UINT32),
Event,
EventSize
);
DumpCcEvent ((CC_EVENT *)CcEvent);
FreePool (CcEvent);
}
return Status;
}
/**
Install TDVF ACPI Table when ACPI Table Protocol is available.
@param[in] Event Event whose notification function is being invoked
@param[in] Context Pointer to the notification function's context
**/
VOID
EFIAPI
InstallAcpiTable (
IN EFI_EVENT Event,
IN VOID *Context
)
{
UINTN TableKey;
EFI_STATUS Status;
EFI_ACPI_TABLE_PROTOCOL *AcpiTable;
UINT64 OemTableId;
Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID **)&AcpiTable);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "TD: AcpiTableProtocol is not installed. %r\n", Status));
return;
}
mTdxEventlogAcpiTemplate.Laml = (UINT64)PcdGet32 (PcdCcEventlogAcpiTableLaml);
mTdxEventlogAcpiTemplate.Lasa = PcdGet64 (PcdCcEventlogAcpiTableLasa);
CopyMem (mTdxEventlogAcpiTemplate.Header.OemId, PcdGetPtr (PcdAcpiDefaultOemId), sizeof (mTdxEventlogAcpiTemplate.Header.OemId));
OemTableId = PcdGet64 (PcdAcpiDefaultOemTableId);
CopyMem (&mTdxEventlogAcpiTemplate.Header.OemTableId, &OemTableId, sizeof (UINT64));
mTdxEventlogAcpiTemplate.Header.OemRevision = PcdGet32 (PcdAcpiDefaultOemRevision);
mTdxEventlogAcpiTemplate.Header.CreatorId = PcdGet32 (PcdAcpiDefaultCreatorId);
mTdxEventlogAcpiTemplate.Header.CreatorRevision = PcdGet32 (PcdAcpiDefaultCreatorRevision);
//
// Construct ACPI Table
Status = AcpiTable->InstallAcpiTable (
AcpiTable,
&mTdxEventlogAcpiTemplate,
mTdxEventlogAcpiTemplate.Header.Length,
&TableKey
);
ASSERT_EFI_ERROR (Status);
DEBUG ((DEBUG_INFO, "TDVF Eventlog ACPI Table is installed.\n"));
}
/**
The function install TdTcg2 protocol.
@retval EFI_SUCCESS TdTcg2 protocol is installed.
@retval other Some error occurs.
**/
EFI_STATUS
InstallCcMeasurementProtocol (
VOID
)
{
EFI_STATUS Status;
EFI_HANDLE Handle;
Handle = NULL;
Status = gBS->InstallMultipleProtocolInterfaces (
&Handle,
&gEfiCcMeasurementProtocolGuid,
&mTdProtocol,
NULL
);
DEBUG ((DEBUG_INFO, "CcProtocol: Install %r\n", Status));
return Status;
}
/**
The driver's entry point. It publishes EFI Tcg2 Protocol.
@param[in] ImageHandle The firmware allocated handle for the EFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The entry point is executed successfully.
@retval other Some error occurs when executing this entry point.
**/
EFI_STATUS
EFIAPI
DriverEntry (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_EVENT Event;
VOID *Registration;
if (!TdIsEnabled ()) {
return EFI_UNSUPPORTED;
}
mImageHandle = ImageHandle;
//
// Fill information
//
// ASSERT (TD_EVENT_LOG_AREA_COUNT_MAX == sizeof(mTEventInfo)/sizeof(mTcg2EventInfo[0]));
mTdxDxeData.BsCap.Size = sizeof (EFI_CC_BOOT_SERVICE_CAPABILITY);
mTdxDxeData.BsCap.ProtocolVersion.Major = 1;
mTdxDxeData.BsCap.ProtocolVersion.Minor = 0;
mTdxDxeData.BsCap.StructureVersion.Major = 1;
mTdxDxeData.BsCap.StructureVersion.Minor = 0;
//
// Get supported PCR and current Active PCRs
// For TD gueset HA384 is supported.
//
mTdxDxeData.BsCap.HashAlgorithmBitmap = HASH_ALG_SHA384;
// TD guest only supports EFI_TCG2_EVENT_LOG_FORMAT_TCG_2
mTdxDxeData.BsCap.SupportedEventLogs = EFI_CC_EVENT_LOG_FORMAT_TCG_2;
//
// Setup the log area and copy event log from hob list to it
//
Status = SetupCcEventLog ();
ASSERT_EFI_ERROR (Status);
if (!EFI_ERROR (Status)) {
Status = SyncCcEvent ();
ASSERT_EFI_ERROR (Status);
}
//
// Measure handoff tables, Boot#### variables etc.
//
Status = EfiCreateEventReadyToBootEx (
TPL_CALLBACK,
OnReadyToBoot,
NULL,
&Event
);
Status = gBS->CreateEventEx (
EVT_NOTIFY_SIGNAL,
TPL_NOTIFY,
OnExitBootServices,
NULL,
&gEfiEventExitBootServicesGuid,
&Event
);
//
// Measure Exit Boot Service failed
//
Status = gBS->CreateEventEx (
EVT_NOTIFY_SIGNAL,
TPL_NOTIFY,
OnExitBootServicesFailed,
NULL,
&gEventExitBootServicesFailedGuid,
&Event
);
//
// Create event callback, because we need access variable on SecureBootPolicyVariable
// We should use VariableWriteArch instead of VariableArch, because Variable driver
// may update SecureBoot value based on last setting.
//
EfiCreateProtocolNotifyEvent (&gEfiVariableWriteArchProtocolGuid, TPL_CALLBACK, MeasureSecureBootPolicy, NULL, &Registration);
//
// Install CcMeasurementProtocol
//
Status = InstallCcMeasurementProtocol ();
DEBUG ((DEBUG_INFO, "InstallCcMeasurementProtocol - %r\n", Status));
if (Status == EFI_SUCCESS) {
//
// Create event callback to install CC EventLog ACPI Table
EfiCreateProtocolNotifyEvent (&gEfiAcpiTableProtocolGuid, TPL_CALLBACK, InstallAcpiTable, NULL, &Registration);
} else {
//
// Cc measurement feature is crucial to a td-guest and it shall stop running immediately
// when it is failed to be installed.
DEBUG ((DEBUG_ERROR, "%a: CcMeasurement protocol failed to be installed - %r\n", __func__, Status));
CpuDeadLoop ();
}
return Status;
}
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