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audk/SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.c

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/** @file
This module implements Tcg2 Protocol.
Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#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/TcgEventHob.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 <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/Tpm2CommandLib.h>
#include <Library/PcdLib.h>
#include <Library/UefiLib.h>
#include <Library/Tpm2DeviceLib.h>
#include <Library/HashLib.h>
#include <Library/PerformanceLib.h>
#include <Library/ReportStatusCodeLib.h>
#include <Library/Tcg2PhysicalPresenceLib.h>
#define PERF_ID_TCG2_DXE 0x3120
typedef struct {
CHAR16 *VariableName;
EFI_GUID *VendorGuid;
} VARIABLE_TYPE;
#define TCG2_DEFAULT_MAX_COMMAND_SIZE 0x1000
#define TCG2_DEFAULT_MAX_RESPONSE_SIZE 0x1000
typedef struct {
EFI_GUID *EventGuid;
EFI_TCG2_EVENT_LOG_FORMAT LogFormat;
} TCG2_EVENT_INFO_STRUCT;
TCG2_EVENT_INFO_STRUCT mTcg2EventInfo[] = {
{&gTcgEventEntryHobGuid, EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2},
{&gTcgEvent2EntryHobGuid, EFI_TCG2_EVENT_LOG_FORMAT_TCG_2},
};
#define TCG_EVENT_LOG_AREA_COUNT_MAX 2
typedef struct {
EFI_TCG2_EVENT_LOG_FORMAT EventLogFormat;
EFI_PHYSICAL_ADDRESS Lasa;
UINT64 Laml;
UINTN EventLogSize;
UINT8 *LastEvent;
BOOLEAN EventLogStarted;
BOOLEAN EventLogTruncated;
} TCG_EVENT_LOG_AREA_STRUCT;
typedef struct _TCG_DXE_DATA {
EFI_TCG2_BOOT_SERVICE_CAPABILITY BsCap;
TCG_EVENT_LOG_AREA_STRUCT EventLogAreaStruct[TCG_EVENT_LOG_AREA_COUNT_MAX];
BOOLEAN GetEventLogCalled[TCG_EVENT_LOG_AREA_COUNT_MAX];
TCG_EVENT_LOG_AREA_STRUCT FinalEventLogAreaStruct[TCG_EVENT_LOG_AREA_COUNT_MAX];
EFI_TCG2_FINAL_EVENTS_TABLE *FinalEventsTable[TCG_EVENT_LOG_AREA_COUNT_MAX];
} TCG_DXE_DATA;
TCG_DXE_DATA mTcgDxeData = {
{
sizeof (EFI_TCG2_BOOT_SERVICE_CAPABILITY), // Size
{ 1, 1 }, // StructureVersion
{ 1, 1 }, // ProtocolVersion
EFI_TCG2_BOOT_HASH_ALG_SHA1, // HashAlgorithmBitmap
EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2, // SupportedEventLogs
TRUE, // TPMPresentFlag
TCG2_DEFAULT_MAX_COMMAND_SIZE, // MaxCommandSize
TCG2_DEFAULT_MAX_RESPONSE_SIZE, // MaxResponseSize
0, // ManufacturerID
0, // NumberOfPCRBanks
0, // ActivePcrBanks
},
};
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_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] PCRIndex TPM PCR index
@param[in] ImageAddress Start address of image buffer.
@param[in] ImageSize Image size
@param[out] DigestList Digeest 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 PCRIndex,
IN EFI_PHYSICAL_ADDRESS ImageAddress,
IN UINTN ImageSize,
OUT TPML_DIGEST_VALUES *DigestList
);
/**
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 ((EFI_D_INFO, "%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;
#define COLUME_SIZE (16 * 2)
Count = Size / COLUME_SIZE;
Left = Size % COLUME_SIZE;
for (Index = 0; Index < Count; Index++) {
DEBUG ((EFI_D_INFO, "%04x: ", Index * COLUME_SIZE));
InternalDumpData (Data + Index * COLUME_SIZE, COLUME_SIZE);
DEBUG ((EFI_D_INFO, "\n"));
}
if (Left != 0) {
DEBUG ((EFI_D_INFO, "%04x: ", Index * COLUME_SIZE));
InternalDumpData (Data + Index * COLUME_SIZE, Left);
DEBUG ((EFI_D_INFO, "\n"));
}
}
/**
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_TCG2_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_TCG2_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
Tcg2GetCapability (
IN EFI_TCG2_PROTOCOL *This,
IN OUT EFI_TCG2_BOOT_SERVICE_CAPABILITY *ProtocolCapability
)
{
DEBUG ((DEBUG_VERBOSE, "Tcg2GetCapability ...\n"));
if ((This == NULL) || (ProtocolCapability == NULL)) {
return EFI_INVALID_PARAMETER;
}
DEBUG ((DEBUG_VERBOSE, "Size - 0x%x\n", ProtocolCapability->Size));
DEBUG ((DEBUG_VERBOSE, " 1.1 - 0x%x, 1.0 - 0x%x\n", sizeof(EFI_TCG2_BOOT_SERVICE_CAPABILITY), sizeof(TREE_BOOT_SERVICE_CAPABILITY_1_0)));
if (ProtocolCapability->Size < mTcgDxeData.BsCap.Size) {
//
// Handle the case that firmware support 1.1 but OS only support 1.0.
//
if ((mTcgDxeData.BsCap.ProtocolVersion.Major > 0x01) ||
((mTcgDxeData.BsCap.ProtocolVersion.Major == 0x01) && ((mTcgDxeData.BsCap.ProtocolVersion.Minor > 0x00)))) {
if (ProtocolCapability->Size >= sizeof(TREE_BOOT_SERVICE_CAPABILITY_1_0)) {
CopyMem (ProtocolCapability, &mTcgDxeData.BsCap, sizeof(TREE_BOOT_SERVICE_CAPABILITY_1_0));
ProtocolCapability->Size = sizeof(TREE_BOOT_SERVICE_CAPABILITY_1_0);
ProtocolCapability->StructureVersion.Major = 1;
ProtocolCapability->StructureVersion.Minor = 0;
ProtocolCapability->ProtocolVersion.Major = 1;
ProtocolCapability->ProtocolVersion.Minor = 0;
DEBUG ((EFI_D_ERROR, "TreeGetCapability (Compatible) - %r\n", EFI_SUCCESS));
return EFI_SUCCESS;
}
}
ProtocolCapability->Size = mTcgDxeData.BsCap.Size;
return EFI_BUFFER_TOO_SMALL;
}
CopyMem (ProtocolCapability, &mTcgDxeData.BsCap, mTcgDxeData.BsCap.Size);
DEBUG ((DEBUG_VERBOSE, "Tcg2GetCapability - %r\n", EFI_SUCCESS));
return EFI_SUCCESS;
}
/**
This function dump PCR event.
@param[in] EventHdr TCG PCR event structure.
**/
VOID
DumpEvent (
IN TCG_PCR_EVENT_HDR *EventHdr
)
{
UINTN Index;
DEBUG ((EFI_D_INFO, " Event:\n"));
DEBUG ((EFI_D_INFO, " PCRIndex - %d\n", EventHdr->PCRIndex));
DEBUG ((EFI_D_INFO, " EventType - 0x%08x\n", EventHdr->EventType));
DEBUG ((EFI_D_INFO, " Digest - "));
for (Index = 0; Index < sizeof(TCG_DIGEST); Index++) {
DEBUG ((EFI_D_INFO, "%02x ", EventHdr->Digest.digest[Index]));
}
DEBUG ((EFI_D_INFO, "\n"));
DEBUG ((EFI_D_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 ((EFI_D_INFO, " TCG_EfiSpecIDEventStruct:\n"));
DEBUG ((EFI_D_INFO, " signature - '"));
for (Index = 0; Index < sizeof(TcgEfiSpecIdEventStruct->signature); Index++) {
DEBUG ((EFI_D_INFO, "%c", TcgEfiSpecIdEventStruct->signature[Index]));
}
DEBUG ((EFI_D_INFO, "'\n"));
DEBUG ((EFI_D_INFO, " platformClass - 0x%08x\n", TcgEfiSpecIdEventStruct->platformClass));
DEBUG ((EFI_D_INFO, " specVersion - %d.%d%d\n", TcgEfiSpecIdEventStruct->specVersionMajor, TcgEfiSpecIdEventStruct->specVersionMinor, TcgEfiSpecIdEventStruct->specErrata));
DEBUG ((EFI_D_INFO, " uintnSize - 0x%02x\n", TcgEfiSpecIdEventStruct->uintnSize));
CopyMem (&NumberOfAlgorithms, TcgEfiSpecIdEventStruct + 1, sizeof(NumberOfAlgorithms));
DEBUG ((EFI_D_INFO, " NumberOfAlgorithms - 0x%08x\n", NumberOfAlgorithms));
DigestSize = (TCG_EfiSpecIdEventAlgorithmSize *)((UINT8 *)TcgEfiSpecIdEventStruct + sizeof(*TcgEfiSpecIdEventStruct) + sizeof(NumberOfAlgorithms));
for (Index = 0; Index < NumberOfAlgorithms; Index++) {
DEBUG ((EFI_D_INFO, " digest(%d)\n", Index));
DEBUG ((EFI_D_INFO, " algorithmId - 0x%04x\n", DigestSize[Index].algorithmId));
DEBUG ((EFI_D_INFO, " digestSize - 0x%04x\n", DigestSize[Index].digestSize));
}
VendorInfoSize = (UINT8 *)&DigestSize[NumberOfAlgorithms];
DEBUG ((EFI_D_INFO, " VendorInfoSize - 0x%02x\n", *VendorInfoSize));
VendorInfo = VendorInfoSize + 1;
DEBUG ((EFI_D_INFO, " VendorInfo - "));
for (Index = 0; Index < *VendorInfoSize; Index++) {
DEBUG ((EFI_D_INFO, "%02x ", VendorInfo[Index]));
}
DEBUG ((EFI_D_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 PCR event 2.
@param[in] TcgPcrEvent2 TCG PCR event 2 structure.
**/
VOID
DumpEvent2 (
IN TCG_PCR_EVENT2 *TcgPcrEvent2
)
{
UINTN Index;
UINT32 DigestIndex;
UINT32 DigestCount;
TPMI_ALG_HASH HashAlgo;
UINT32 DigestSize;
UINT8 *DigestBuffer;
UINT32 EventSize;
UINT8 *EventBuffer;
DEBUG ((EFI_D_INFO, " Event:\n"));
DEBUG ((EFI_D_INFO, " PCRIndex - %d\n", TcgPcrEvent2->PCRIndex));
DEBUG ((EFI_D_INFO, " EventType - 0x%08x\n", TcgPcrEvent2->EventType));
DEBUG ((EFI_D_INFO, " DigestCount: 0x%08x\n", TcgPcrEvent2->Digest.count));
DigestCount = TcgPcrEvent2->Digest.count;
HashAlgo = TcgPcrEvent2->Digest.digests[0].hashAlg;
DigestBuffer = (UINT8 *)&TcgPcrEvent2->Digest.digests[0].digest;
for (DigestIndex = 0; DigestIndex < DigestCount; DigestIndex++) {
DEBUG ((EFI_D_INFO, " HashAlgo : 0x%04x\n", HashAlgo));
DEBUG ((EFI_D_INFO, " Digest(%d): ", DigestIndex));
DigestSize = GetHashSizeFromAlgo (HashAlgo);
for (Index = 0; Index < DigestSize; Index++) {
DEBUG ((EFI_D_INFO, "%02x ", DigestBuffer[Index]));
}
DEBUG ((EFI_D_INFO, "\n"));
//
// Prepare next
//
CopyMem (&HashAlgo, DigestBuffer + DigestSize, sizeof(TPMI_ALG_HASH));
DigestBuffer = DigestBuffer + DigestSize + sizeof(TPMI_ALG_HASH);
}
DEBUG ((EFI_D_INFO, "\n"));
DigestBuffer = DigestBuffer - sizeof(TPMI_ALG_HASH);
CopyMem (&EventSize, DigestBuffer, sizeof(TcgPcrEvent2->EventSize));
DEBUG ((EFI_D_INFO, " EventSize - 0x%08x\n", EventSize));
EventBuffer = DigestBuffer + sizeof(TcgPcrEvent2->EventSize);
InternalDumpHex (EventBuffer, EventSize);
}
/**
This function returns size of TCG PCR event 2.
@param[in] TcgPcrEvent2 TCG PCR event 2 structure.
@return size of TCG PCR event 2.
**/
UINTN
GetPcrEvent2Size (
IN TCG_PCR_EVENT2 *TcgPcrEvent2
)
{
UINT32 DigestIndex;
UINT32 DigestCount;
TPMI_ALG_HASH HashAlgo;
UINT32 DigestSize;
UINT8 *DigestBuffer;
UINT32 EventSize;
UINT8 *EventBuffer;
DigestCount = TcgPcrEvent2->Digest.count;
HashAlgo = TcgPcrEvent2->Digest.digests[0].hashAlg;
DigestBuffer = (UINT8 *)&TcgPcrEvent2->Digest.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(TcgPcrEvent2->EventSize));
EventBuffer = DigestBuffer + sizeof(TcgPcrEvent2->EventSize);
return (UINTN)EventBuffer + EventSize - (UINTN)TcgPcrEvent2;
}
/**
This function dump event log.
@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
DumpEventLog (
IN EFI_TCG2_EVENT_LOG_FORMAT EventLogFormat,
IN EFI_PHYSICAL_ADDRESS EventLogLocation,
IN EFI_PHYSICAL_ADDRESS EventLogLastEntry,
IN EFI_TCG2_FINAL_EVENTS_TABLE *FinalEventsTable
)
{
TCG_PCR_EVENT_HDR *EventHdr;
TCG_PCR_EVENT2 *TcgPcrEvent2;
TCG_EfiSpecIDEventStruct *TcgEfiSpecIdEventStruct;
UINTN NumberOfEvents;
DEBUG ((EFI_D_INFO, "EventLogFormat: (0x%x)\n", EventLogFormat));
switch (EventLogFormat) {
case EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2:
EventHdr = (TCG_PCR_EVENT_HDR *)(UINTN)EventLogLocation;
while ((UINTN)EventHdr <= EventLogLastEntry) {
DumpEvent (EventHdr);
EventHdr = (TCG_PCR_EVENT_HDR *)((UINTN)EventHdr + sizeof(TCG_PCR_EVENT_HDR) + EventHdr->EventSize);
}
if (FinalEventsTable == NULL) {
DEBUG ((EFI_D_INFO, "FinalEventsTable: NOT FOUND\n"));
} else {
DEBUG ((EFI_D_INFO, "FinalEventsTable: (0x%x)\n", FinalEventsTable));
DEBUG ((EFI_D_INFO, " Version: (0x%x)\n", FinalEventsTable->Version));
DEBUG ((EFI_D_INFO, " NumberOfEvents: (0x%x)\n", FinalEventsTable->NumberOfEvents));
EventHdr = (TCG_PCR_EVENT_HDR *)(UINTN)(FinalEventsTable + 1);
for (NumberOfEvents = 0; NumberOfEvents < FinalEventsTable->NumberOfEvents; NumberOfEvents++) {
DumpEvent (EventHdr);
EventHdr = (TCG_PCR_EVENT_HDR *)((UINTN)EventHdr + sizeof(TCG_PCR_EVENT_HDR) + EventHdr->EventSize);
}
}
break;
case EFI_TCG2_EVENT_LOG_FORMAT_TCG_2:
//
// Dump first event
//
EventHdr = (TCG_PCR_EVENT_HDR *)(UINTN)EventLogLocation;
DumpEvent (EventHdr);
TcgEfiSpecIdEventStruct = (TCG_EfiSpecIDEventStruct *)(EventHdr + 1);
DumpTcgEfiSpecIdEventStruct (TcgEfiSpecIdEventStruct);
TcgPcrEvent2 = (TCG_PCR_EVENT2 *)((UINTN)TcgEfiSpecIdEventStruct + GetTcgEfiSpecIdEventStructSize (TcgEfiSpecIdEventStruct));
while ((UINTN)TcgPcrEvent2 <= EventLogLastEntry) {
DumpEvent2 (TcgPcrEvent2);
TcgPcrEvent2 = (TCG_PCR_EVENT2 *)((UINTN)TcgPcrEvent2 + GetPcrEvent2Size (TcgPcrEvent2));
}
if (FinalEventsTable == NULL) {
DEBUG ((EFI_D_INFO, "FinalEventsTable: NOT FOUND\n"));
} else {
DEBUG ((EFI_D_INFO, "FinalEventsTable: (0x%x)\n", FinalEventsTable));
DEBUG ((EFI_D_INFO, " Version: (0x%x)\n", FinalEventsTable->Version));
DEBUG ((EFI_D_INFO, " NumberOfEvents: (0x%x)\n", FinalEventsTable->NumberOfEvents));
TcgPcrEvent2 = (TCG_PCR_EVENT2 *)(UINTN)(FinalEventsTable + 1);
for (NumberOfEvents = 0; NumberOfEvents < FinalEventsTable->NumberOfEvents; NumberOfEvents++) {
DumpEvent2 (TcgPcrEvent2);
TcgPcrEvent2 = (TCG_PCR_EVENT2 *)((UINTN)TcgPcrEvent2 + GetPcrEvent2Size (TcgPcrEvent2));
}
}
break;
}
return ;
}
/**
The EFI_TCG2_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
Tcg2GetEventLog (
IN EFI_TCG2_PROTOCOL *This,
IN EFI_TCG2_EVENT_LOG_FORMAT EventLogFormat,
OUT EFI_PHYSICAL_ADDRESS *EventLogLocation,
OUT EFI_PHYSICAL_ADDRESS *EventLogLastEntry,
OUT BOOLEAN *EventLogTruncated
)
{
UINTN Index;
DEBUG ((EFI_D_INFO, "Tcg2GetEventLog ... (0x%x)\n", EventLogFormat));
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
for (Index = 0; Index < sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0]); Index++) {
if (EventLogFormat == mTcg2EventInfo[Index].LogFormat) {
break;
}
}
if (Index == sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0])) {
return EFI_INVALID_PARAMETER;
}
if ((mTcg2EventInfo[Index].LogFormat & mTcgDxeData.BsCap.SupportedEventLogs) == 0) {
return EFI_INVALID_PARAMETER;
}
if (!mTcgDxeData.BsCap.TPMPresentFlag) {
if (EventLogLocation != NULL) {
*EventLogLocation = 0;
}
if (EventLogLastEntry != NULL) {
*EventLogLastEntry = 0;
}
if (EventLogTruncated != NULL) {
*EventLogTruncated = FALSE;
}
return EFI_SUCCESS;
}
if (EventLogLocation != NULL) {
*EventLogLocation = mTcgDxeData.EventLogAreaStruct[Index].Lasa;
DEBUG ((EFI_D_INFO, "Tcg2GetEventLog (EventLogLocation - %x)\n", *EventLogLocation));
}
if (EventLogLastEntry != NULL) {
if (!mTcgDxeData.EventLogAreaStruct[Index].EventLogStarted) {
*EventLogLastEntry = (EFI_PHYSICAL_ADDRESS)(UINTN)0;
} else {
*EventLogLastEntry = (EFI_PHYSICAL_ADDRESS)(UINTN)mTcgDxeData.EventLogAreaStruct[Index].LastEvent;
}
DEBUG ((EFI_D_INFO, "Tcg2GetEventLog (EventLogLastEntry - %x)\n", *EventLogLastEntry));
}
if (EventLogTruncated != NULL) {
*EventLogTruncated = mTcgDxeData.EventLogAreaStruct[Index].EventLogTruncated;
DEBUG ((EFI_D_INFO, "Tcg2GetEventLog (EventLogTruncated - %x)\n", *EventLogTruncated));
}
DEBUG ((EFI_D_INFO, "Tcg2GetEventLog - %r\n", EFI_SUCCESS));
// Dump Event Log for debug purpose
if ((EventLogLocation != NULL) && (EventLogLastEntry != NULL)) {
DumpEventLog (EventLogFormat, *EventLogLocation, *EventLogLastEntry, mTcgDxeData.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.
//
mTcgDxeData.GetEventLogCalled[Index] = TRUE;
return EFI_SUCCESS;
}
/**
Add a new entry to the Event Log.
@param[in, out] EventLogPtr Pointer to the Event Log data.
@param[in, out] LogSize Size of the Event Log.
@param[in] MaxSize Maximum size of the Event Log.
@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 UINT8 **EventLogPtr,
IN OUT UINTN *LogSize,
IN UINTN MaxSize,
IN VOID *NewEventHdr,
IN UINT32 NewEventHdrSize,
IN UINT8 *NewEventData,
IN UINT32 NewEventSize
)
{
UINTN NewLogSize;
if (NewEventSize > MAX_ADDRESS - NewEventHdrSize) {
return EFI_OUT_OF_RESOURCES;
}
NewLogSize = NewEventHdrSize + NewEventSize;
if (NewLogSize > MAX_ADDRESS - *LogSize) {
return EFI_OUT_OF_RESOURCES;
}
if (NewLogSize + *LogSize > MaxSize) {
DEBUG ((EFI_D_INFO, " MaxSize - 0x%x\n", MaxSize));
DEBUG ((EFI_D_INFO, " NewLogSize - 0x%x\n", NewLogSize));
DEBUG ((EFI_D_INFO, " LogSize - 0x%x\n", *LogSize));
DEBUG ((EFI_D_INFO, "TcgCommLogEvent - %r\n", EFI_OUT_OF_RESOURCES));
return EFI_OUT_OF_RESOURCES;
}
*EventLogPtr += *LogSize;
*LogSize += NewLogSize;
CopyMem (*EventLogPtr, NewEventHdr, NewEventHdrSize);
CopyMem (
*EventLogPtr + NewEventHdrSize,
NewEventData,
NewEventSize
);
return 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
TcgDxeLogEvent (
IN EFI_TCG2_EVENT_LOG_FORMAT EventLogFormat,
IN VOID *NewEventHdr,
IN UINT32 NewEventHdrSize,
IN UINT8 *NewEventData,
IN UINT32 NewEventSize
)
{
EFI_STATUS Status;
UINTN Index;
TCG_EVENT_LOG_AREA_STRUCT *EventLogAreaStruct;
for (Index = 0; Index < sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0]); Index++) {
if (EventLogFormat == mTcg2EventInfo[Index].LogFormat) {
break;
}
}
if (Index == sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0])) {
return EFI_INVALID_PARAMETER;
}
//
// Record to normal event log
//
EventLogAreaStruct = &mTcgDxeData.EventLogAreaStruct[Index];
if (EventLogAreaStruct->EventLogTruncated) {
return EFI_VOLUME_FULL;
}
EventLogAreaStruct->LastEvent = (UINT8*)(UINTN)EventLogAreaStruct->Lasa;
Status = TcgCommLogEvent (
&EventLogAreaStruct->LastEvent,
&EventLogAreaStruct->EventLogSize,
(UINTN)EventLogAreaStruct->Laml,
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 (mTcgDxeData.GetEventLogCalled[Index]) {
if (mTcgDxeData.FinalEventsTable[Index] == NULL) {
//
// no need for FinalEventsTable
//
return EFI_SUCCESS;
}
EventLogAreaStruct = &mTcgDxeData.FinalEventLogAreaStruct[Index];
if (EventLogAreaStruct->EventLogTruncated) {
return EFI_VOLUME_FULL;
}
EventLogAreaStruct->LastEvent = (UINT8*)(UINTN)EventLogAreaStruct->Lasa;
Status = TcgCommLogEvent (
&EventLogAreaStruct->LastEvent,
&EventLogAreaStruct->EventLogSize,
(UINTN)EventLogAreaStruct->Laml,
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
//
(mTcgDxeData.FinalEventsTable[Index])->NumberOfEvents ++;
DEBUG ((EFI_D_INFO, "FinalEventsTable->NumberOfEvents - 0x%x\n", (mTcgDxeData.FinalEventsTable[Index])->NumberOfEvents));
DEBUG ((EFI_D_INFO, " Size - 0x%x\n", (UINTN)EventLogAreaStruct->LastEvent - (UINTN)mTcgDxeData.FinalEventsTable[Index]));
}
}
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;
}
/**
Add a new entry to the Event Log.
@param[in] DigestList A list of digest.
@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 The new event log entry was added.
@retval EFI_OUT_OF_RESOURCES No enough memory to log the new event.
**/
EFI_STATUS
TcgDxeLogHashEvent (
IN TPML_DIGEST_VALUES *DigestList,
IN OUT TCG_PCR_EVENT_HDR *NewEventHdr,
IN UINT8 *NewEventData
)
{
EFI_STATUS Status;
EFI_TPL OldTpl;
UINTN Index;
EFI_STATUS RetStatus;
TCG_PCR_EVENT2 TcgPcrEvent2;
UINT8 *DigestBuffer;
DEBUG ((EFI_D_INFO, "SupportedEventLogs - 0x%08x\n", mTcgDxeData.BsCap.SupportedEventLogs));
RetStatus = EFI_SUCCESS;
for (Index = 0; Index < sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0]); Index++) {
if ((mTcgDxeData.BsCap.SupportedEventLogs & mTcg2EventInfo[Index].LogFormat) != 0) {
DEBUG ((EFI_D_INFO, " LogFormat - 0x%08x\n", mTcg2EventInfo[Index].LogFormat));
switch (mTcg2EventInfo[Index].LogFormat) {
case EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2:
Status = GetDigestFromDigestList (TPM_ALG_SHA1, DigestList, &NewEventHdr->Digest);
if (!EFI_ERROR (Status)) {
//
// Enter critical region
//
OldTpl = gBS->RaiseTPL (TPL_HIGH_LEVEL);
Status = TcgDxeLogEvent (
mTcg2EventInfo[Index].LogFormat,
NewEventHdr,
sizeof(TCG_PCR_EVENT_HDR),
NewEventData,
NewEventHdr->EventSize
);
if (Status != EFI_SUCCESS) {
RetStatus = Status;
}
gBS->RestoreTPL (OldTpl);
//
// Exit critical region
//
}
break;
case EFI_TCG2_EVENT_LOG_FORMAT_TCG_2:
ZeroMem (&TcgPcrEvent2, sizeof(TcgPcrEvent2));
TcgPcrEvent2.PCRIndex = NewEventHdr->PCRIndex;
TcgPcrEvent2.EventType = NewEventHdr->EventType;
DigestBuffer = (UINT8 *)&TcgPcrEvent2.Digest;
DigestBuffer = CopyDigestListToBuffer (DigestBuffer, DigestList, mTcgDxeData.BsCap.ActivePcrBanks);
CopyMem (DigestBuffer, &NewEventHdr->EventSize, sizeof(NewEventHdr->EventSize));
DigestBuffer = DigestBuffer + sizeof(NewEventHdr->EventSize);
//
// Enter critical region
//
OldTpl = gBS->RaiseTPL (TPL_HIGH_LEVEL);
Status = TcgDxeLogEvent (
mTcg2EventInfo[Index].LogFormat,
&TcgPcrEvent2,
sizeof(TcgPcrEvent2.PCRIndex) + sizeof(TcgPcrEvent2.EventType) + GetDigestListSize (DigestList) + sizeof(TcgPcrEvent2.EventSize),
NewEventData,
NewEventHdr->EventSize
);
if (Status != EFI_SUCCESS) {
RetStatus = Status;
}
gBS->RestoreTPL (OldTpl);
//
// Exit critical region
//
break;
}
}
}
return RetStatus;
}
/**
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] 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 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
TcgDxeHashLogExtendEvent (
IN UINT64 Flags,
IN UINT8 *HashData,
IN UINT64 HashDataLen,
IN OUT TCG_PCR_EVENT_HDR *NewEventHdr,
IN UINT8 *NewEventData
)
{
EFI_STATUS Status;
TPML_DIGEST_VALUES DigestList;
if (!mTcgDxeData.BsCap.TPMPresentFlag) {
return EFI_DEVICE_ERROR;
}
Status = HashAndExtend (
NewEventHdr->PCRIndex,
HashData,
(UINTN)HashDataLen,
&DigestList
);
if (!EFI_ERROR (Status)) {
if ((Flags & EFI_TCG2_EXTEND_ONLY) == 0) {
Status = TcgDxeLogHashEvent (&DigestList, NewEventHdr, NewEventData);
}
}
if (Status == EFI_DEVICE_ERROR) {
DEBUG ((EFI_D_ERROR, "TcgDxeHashLogExtendEvent - %r. Disable TPM.\n", Status));
mTcgDxeData.BsCap.TPMPresentFlag = FALSE;
REPORT_STATUS_CODE (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
(PcdGet32 (PcdStatusCodeSubClassTpmDevice) | EFI_P_EC_INTERFACE_ERROR)
);
}
return Status;
}
/**
The EFI_TCG2_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
Tcg2HashLogExtendEvent (
IN EFI_TCG2_PROTOCOL *This,
IN UINT64 Flags,
IN EFI_PHYSICAL_ADDRESS DataToHash,
IN UINT64 DataToHashLen,
IN EFI_TCG2_EVENT *Event
)
{
EFI_STATUS Status;
TCG_PCR_EVENT_HDR NewEventHdr;
TPML_DIGEST_VALUES DigestList;
DEBUG ((DEBUG_VERBOSE, "Tcg2HashLogExtendEvent ...\n"));
if ((This == NULL) || (DataToHash == 0) || (Event == NULL)) {
return EFI_INVALID_PARAMETER;
}
if (!mTcgDxeData.BsCap.TPMPresentFlag) {
return EFI_DEVICE_ERROR;
}
if (Event->Size < Event->Header.HeaderSize + sizeof(UINT32)) {
return EFI_INVALID_PARAMETER;
}
if (Event->Header.PCRIndex > MAX_PCR_INDEX) {
return EFI_INVALID_PARAMETER;
}
NewEventHdr.PCRIndex = Event->Header.PCRIndex;
NewEventHdr.EventType = Event->Header.EventType;
NewEventHdr.EventSize = Event->Size - sizeof(UINT32) - Event->Header.HeaderSize;
if ((Flags & PE_COFF_IMAGE) != 0) {
Status = MeasurePeImageAndExtend (
NewEventHdr.PCRIndex,
DataToHash,
(UINTN)DataToHashLen,
&DigestList
);
if (!EFI_ERROR (Status)) {
if ((Flags & EFI_TCG2_EXTEND_ONLY) == 0) {
Status = TcgDxeLogHashEvent (&DigestList, &NewEventHdr, Event->Event);
}
}
if (Status == EFI_DEVICE_ERROR) {
DEBUG ((EFI_D_ERROR, "MeasurePeImageAndExtend - %r. Disable TPM.\n", Status));
mTcgDxeData.BsCap.TPMPresentFlag = FALSE;
REPORT_STATUS_CODE (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
(PcdGet32 (PcdStatusCodeSubClassTpmDevice) | EFI_P_EC_INTERFACE_ERROR)
);
}
} else {
Status = TcgDxeHashLogExtendEvent (
Flags,
(UINT8 *) (UINTN) DataToHash,
DataToHashLen,
&NewEventHdr,
Event->Event
);
}
DEBUG ((DEBUG_VERBOSE, "Tcg2HashLogExtendEvent - %r\n", Status));
return Status;
}
/**
This service enables the sending of commands to the TPM.
@param[in] This Indicates the calling context
@param[in] InputParameterBlockSize Size of the TPM input parameter block.
@param[in] InputParameterBlock Pointer to the TPM input parameter block.
@param[in] OutputParameterBlockSize Size of the TPM output parameter block.
@param[in] OutputParameterBlock Pointer to the TPM 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_INVALID_PARAMETER One or more of the parameters are incorrect.
@retval EFI_BUFFER_TOO_SMALL The output parameter block is too small.
**/
EFI_STATUS
EFIAPI
Tcg2SubmitCommand (
IN EFI_TCG2_PROTOCOL *This,
IN UINT32 InputParameterBlockSize,
IN UINT8 *InputParameterBlock,
IN UINT32 OutputParameterBlockSize,
IN UINT8 *OutputParameterBlock
)
{
EFI_STATUS Status;
DEBUG ((EFI_D_INFO, "Tcg2SubmitCommand ...\n"));
if ((This == NULL) ||
(InputParameterBlockSize == 0) || (InputParameterBlock == NULL) ||
(OutputParameterBlockSize == 0) || (OutputParameterBlock == NULL)) {
return EFI_INVALID_PARAMETER;
}
if (!mTcgDxeData.BsCap.TPMPresentFlag) {
return EFI_DEVICE_ERROR;
}
if (InputParameterBlockSize > mTcgDxeData.BsCap.MaxCommandSize) {
return EFI_INVALID_PARAMETER;
}
if (OutputParameterBlockSize > mTcgDxeData.BsCap.MaxResponseSize) {
return EFI_INVALID_PARAMETER;
}
Status = Tpm2SubmitCommand (
InputParameterBlockSize,
InputParameterBlock,
&OutputParameterBlockSize,
OutputParameterBlock
);
DEBUG ((EFI_D_INFO, "Tcg2SubmitCommand - %r\n", Status));
return Status;
}
/**
This service returns the currently active PCR banks.
@param[in] This Indicates the calling context
@param[out] ActivePcrBanks Pointer to the variable receiving the bitmap of currently active PCR banks.
@retval EFI_SUCCESS The bitmap of active PCR banks was stored in the ActivePcrBanks parameter.
@retval EFI_INVALID_PARAMETER One or more of the parameters are incorrect.
**/
EFI_STATUS
EFIAPI
Tcg2GetActivePCRBanks (
IN EFI_TCG2_PROTOCOL *This,
OUT UINT32 *ActivePcrBanks
)
{
if (ActivePcrBanks == NULL) {
return EFI_INVALID_PARAMETER;
}
*ActivePcrBanks = mTcgDxeData.BsCap.ActivePcrBanks;
return EFI_SUCCESS;
}
/**
This service sets the currently active PCR banks.
@param[in] This Indicates the calling context
@param[in] ActivePcrBanks Bitmap of the requested active PCR banks. At least one bit SHALL be set.
@retval EFI_SUCCESS The bitmap in ActivePcrBank parameter is already active.
@retval EFI_INVALID_PARAMETER One or more of the parameters are incorrect.
**/
EFI_STATUS
EFIAPI
Tcg2SetActivePCRBanks (
IN EFI_TCG2_PROTOCOL *This,
IN UINT32 ActivePcrBanks
)
{
EFI_STATUS Status;
UINT32 ReturnCode;
DEBUG ((EFI_D_INFO, "Tcg2SetActivePCRBanks ... (0x%x)\n", ActivePcrBanks));
if (ActivePcrBanks == 0) {
return EFI_INVALID_PARAMETER;
}
if ((ActivePcrBanks & (~mTcgDxeData.BsCap.HashAlgorithmBitmap)) != 0) {
return EFI_INVALID_PARAMETER;
}
if (ActivePcrBanks == mTcgDxeData.BsCap.ActivePcrBanks) {
//
// Need clear previous SET_PCR_BANKS setting
//
ReturnCode = Tcg2PhysicalPresenceLibSubmitRequestToPreOSFunction (TCG2_PHYSICAL_PRESENCE_NO_ACTION, 0);
} else {
ReturnCode = Tcg2PhysicalPresenceLibSubmitRequestToPreOSFunction (TCG2_PHYSICAL_PRESENCE_SET_PCR_BANKS, ActivePcrBanks);
}
if (ReturnCode == TCG_PP_SUBMIT_REQUEST_TO_PREOS_SUCCESS) {
Status = EFI_SUCCESS;
} else if (ReturnCode == TCG_PP_SUBMIT_REQUEST_TO_PREOS_GENERAL_FAILURE) {
Status = EFI_OUT_OF_RESOURCES;
} else if (ReturnCode == TCG_PP_SUBMIT_REQUEST_TO_PREOS_NOT_IMPLEMENTED) {
Status = EFI_UNSUPPORTED;
} else {
Status = EFI_DEVICE_ERROR;
}
DEBUG ((EFI_D_INFO, "Tcg2SetActivePCRBanks - %r\n", Status));
return Status;
}
/**
This service retrieves the result of a previous invocation of SetActivePcrBanks.
@param[in] This Indicates the calling context
@param[out] OperationPresent Non-zero value to indicate a SetActivePcrBank operation was invoked during the last boot.
@param[out] Response The response from the SetActivePcrBank request.
@retval EFI_SUCCESS The result value could be returned.
@retval EFI_INVALID_PARAMETER One or more of the parameters are incorrect.
**/
EFI_STATUS
EFIAPI
Tcg2GetResultOfSetActivePcrBanks (
IN EFI_TCG2_PROTOCOL *This,
OUT UINT32 *OperationPresent,
OUT UINT32 *Response
)
{
UINT32 ReturnCode;
if ((OperationPresent == NULL) || (Response == NULL)) {
return EFI_INVALID_PARAMETER;
}
ReturnCode = Tcg2PhysicalPresenceLibReturnOperationResponseToOsFunction (OperationPresent, Response);
if (ReturnCode == TCG_PP_RETURN_TPM_OPERATION_RESPONSE_SUCCESS) {
return EFI_SUCCESS;
} else {
return EFI_UNSUPPORTED;
}
}
EFI_TCG2_PROTOCOL mTcg2Protocol = {
Tcg2GetCapability,
Tcg2GetEventLog,
Tcg2HashLogExtendEvent,
Tcg2SubmitCommand,
Tcg2GetActivePCRBanks,
Tcg2SetActivePCRBanks,
Tcg2GetResultOfSetActivePcrBanks,
};
/**
Initialize the 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
SetupEventLog (
VOID
)
{
EFI_STATUS Status;
VOID *TcgEvent;
EFI_PEI_HOB_POINTERS GuidHob;
EFI_PHYSICAL_ADDRESS Lasa;
UINTN Index;
UINT32 DigestListBinSize;
UINT32 EventSize;
TCG_EfiSpecIDEventStruct *TcgEfiSpecIdEventStruct;
UINT8 TempBuf[sizeof(TCG_EfiSpecIDEventStruct) + sizeof(UINT32) + (HASH_COUNT * sizeof(TCG_EfiSpecIdEventAlgorithmSize)) + sizeof(UINT8)];
TCG_PCR_EVENT_HDR FirstPcrEvent;
TCG_EfiSpecIdEventAlgorithmSize *DigestSize;
TCG_EfiSpecIdEventAlgorithmSize *TempDigestSize;
UINT8 *VendorInfoSize;
UINT32 NumberOfAlgorithms;
DEBUG ((EFI_D_INFO, "SetupEventLog\n"));
//
// 1. Create Log Area
//
for (Index = 0; Index < sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0]); Index++) {
if ((mTcgDxeData.BsCap.SupportedEventLogs & mTcg2EventInfo[Index].LogFormat) != 0) {
mTcgDxeData.EventLogAreaStruct[Index].EventLogFormat = mTcg2EventInfo[Index].LogFormat;
Lasa = (EFI_PHYSICAL_ADDRESS) (SIZE_4GB - 1);
Status = gBS->AllocatePages (
AllocateMaxAddress,
EfiBootServicesData,
EFI_SIZE_TO_PAGES (PcdGet32 (PcdTcgLogAreaMinLen)),
&Lasa
);
if (EFI_ERROR (Status)) {
return Status;
}
mTcgDxeData.EventLogAreaStruct[Index].Lasa = Lasa;
mTcgDxeData.EventLogAreaStruct[Index].Laml = PcdGet32 (PcdTcgLogAreaMinLen);
//
// 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
//
if (mTcg2EventInfo[Index].LogFormat != EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2) {
//
// 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));
if ((mTcgDxeData.BsCap.ActivePcrBanks & EFI_TCG2_BOOT_HASH_ALG_SHA1) != 0) {
TempDigestSize = DigestSize;
TempDigestSize += NumberOfAlgorithms;
TempDigestSize->algorithmId = TPM_ALG_SHA1;
TempDigestSize->digestSize = SHA1_DIGEST_SIZE;
NumberOfAlgorithms++;
}
if ((mTcgDxeData.BsCap.ActivePcrBanks & EFI_TCG2_BOOT_HASH_ALG_SHA256) != 0) {
TempDigestSize = DigestSize;
TempDigestSize += NumberOfAlgorithms;
TempDigestSize->algorithmId = TPM_ALG_SHA256;
TempDigestSize->digestSize = SHA256_DIGEST_SIZE;
NumberOfAlgorithms++;
}
if ((mTcgDxeData.BsCap.ActivePcrBanks & EFI_TCG2_BOOT_HASH_ALG_SHA384) != 0) {
TempDigestSize = DigestSize;
TempDigestSize += NumberOfAlgorithms;
TempDigestSize->algorithmId = TPM_ALG_SHA384;
TempDigestSize->digestSize = SHA384_DIGEST_SIZE;
NumberOfAlgorithms++;
}
if ((mTcgDxeData.BsCap.ActivePcrBanks & EFI_TCG2_BOOT_HASH_ALG_SHA512) != 0) {
TempDigestSize = DigestSize;
TempDigestSize += NumberOfAlgorithms;
TempDigestSize->algorithmId = TPM_ALG_SHA512;
TempDigestSize->digestSize = SHA512_DIGEST_SIZE;
NumberOfAlgorithms++;
}
if ((mTcgDxeData.BsCap.ActivePcrBanks & EFI_TCG2_BOOT_HASH_ALG_SM3_256) != 0) {
TempDigestSize = DigestSize;
TempDigestSize += NumberOfAlgorithms;
TempDigestSize->algorithmId = TPM_ALG_SM3_256;
TempDigestSize->digestSize = SM3_256_DIGEST_SIZE;
NumberOfAlgorithms++;
}
CopyMem (TcgEfiSpecIdEventStruct + 1, &NumberOfAlgorithms, sizeof(NumberOfAlgorithms));
TempDigestSize = DigestSize;
TempDigestSize += NumberOfAlgorithms;
VendorInfoSize = (UINT8 *)TempDigestSize;
*VendorInfoSize = 0;
//
// FirstPcrEvent
//
FirstPcrEvent.PCRIndex = 0;
FirstPcrEvent.EventType = EV_NO_ACTION;
ZeroMem (&FirstPcrEvent.Digest, sizeof(FirstPcrEvent.Digest));
FirstPcrEvent.EventSize = (UINT32)GetTcgEfiSpecIdEventStructSize (TcgEfiSpecIdEventStruct);
//
// Record
//
Status = TcgDxeLogEvent (
mTcg2EventInfo[Index].LogFormat,
&FirstPcrEvent,
sizeof(FirstPcrEvent),
(UINT8 *)TcgEfiSpecIdEventStruct,
FirstPcrEvent.EventSize
);
}
}
}
//
// 2. Create Final Log Area
//
for (Index = 0; Index < sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0]); Index++) {
if ((mTcgDxeData.BsCap.SupportedEventLogs & mTcg2EventInfo[Index].LogFormat) != 0) {
if (mTcg2EventInfo[Index].LogFormat == EFI_TCG2_EVENT_LOG_FORMAT_TCG_2) {
Lasa = (EFI_PHYSICAL_ADDRESS) (SIZE_4GB - 1);
Status = gBS->AllocatePages (
AllocateMaxAddress,
EfiACPIMemoryNVS,
EFI_SIZE_TO_PAGES (PcdGet32 (PcdTcg2FinalLogAreaLen)),
&Lasa
);
if (EFI_ERROR (Status)) {
return Status;
}
SetMem ((VOID *)(UINTN)Lasa, PcdGet32 (PcdTcg2FinalLogAreaLen), 0xFF);
//
// Initialize
//
mTcgDxeData.FinalEventsTable[Index] = (VOID *)(UINTN)Lasa;
(mTcgDxeData.FinalEventsTable[Index])->Version = EFI_TCG2_FINAL_EVENTS_TABLE_VERSION;
(mTcgDxeData.FinalEventsTable[Index])->NumberOfEvents = 0;
mTcgDxeData.FinalEventLogAreaStruct[Index].EventLogFormat = mTcg2EventInfo[Index].LogFormat;
mTcgDxeData.FinalEventLogAreaStruct[Index].Lasa = Lasa + sizeof(EFI_TCG2_FINAL_EVENTS_TABLE);
mTcgDxeData.FinalEventLogAreaStruct[Index].Laml = PcdGet32 (PcdTcg2FinalLogAreaLen) - sizeof(EFI_TCG2_FINAL_EVENTS_TABLE);
mTcgDxeData.FinalEventLogAreaStruct[Index].EventLogSize = 0;
mTcgDxeData.FinalEventLogAreaStruct[Index].LastEvent = (VOID *)(UINTN)mTcgDxeData.FinalEventLogAreaStruct[Index].Lasa;
mTcgDxeData.FinalEventLogAreaStruct[Index].EventLogStarted = FALSE;
mTcgDxeData.FinalEventLogAreaStruct[Index].EventLogTruncated = FALSE;
//
// Install to configuration table for EFI_TCG2_EVENT_LOG_FORMAT_TCG_2
//
Status = gBS->InstallConfigurationTable (&gEfiTcg2FinalEventsTableGuid, (VOID *)mTcgDxeData.FinalEventsTable[Index]);
if (EFI_ERROR (Status)) {
return Status;
}
} else {
//
// No need to handle EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2
//
mTcgDxeData.FinalEventsTable[Index] = NULL;
mTcgDxeData.FinalEventLogAreaStruct[Index].EventLogFormat = mTcg2EventInfo[Index].LogFormat;
mTcgDxeData.FinalEventLogAreaStruct[Index].Lasa = 0;
mTcgDxeData.FinalEventLogAreaStruct[Index].Laml = 0;
mTcgDxeData.FinalEventLogAreaStruct[Index].EventLogSize = 0;
mTcgDxeData.FinalEventLogAreaStruct[Index].LastEvent = 0;
mTcgDxeData.FinalEventLogAreaStruct[Index].EventLogStarted = FALSE;
mTcgDxeData.FinalEventLogAreaStruct[Index].EventLogTruncated = FALSE;
}
}
}
//
// 3. Sync data from PEI to DXE
//
Status = EFI_SUCCESS;
for (Index = 0; Index < sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0]); Index++) {
if ((mTcgDxeData.BsCap.SupportedEventLogs & mTcg2EventInfo[Index].LogFormat) != 0) {
GuidHob.Raw = GetHobList ();
Status = EFI_SUCCESS;
while (!EFI_ERROR (Status) &&
(GuidHob.Raw = GetNextGuidHob (mTcg2EventInfo[Index].EventGuid, GuidHob.Raw)) != NULL) {
TcgEvent = GET_GUID_HOB_DATA (GuidHob.Guid);
GuidHob.Raw = GET_NEXT_HOB (GuidHob);
switch (mTcg2EventInfo[Index].LogFormat) {
case EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2:
Status = TcgDxeLogEvent (
mTcg2EventInfo[Index].LogFormat,
TcgEvent,
sizeof(TCG_PCR_EVENT_HDR),
((TCG_PCR_EVENT*)TcgEvent)->Event,
((TCG_PCR_EVENT_HDR*)TcgEvent)->EventSize
);
break;
case EFI_TCG2_EVENT_LOG_FORMAT_TCG_2:
DigestListBinSize = GetDigestListBinSize ((UINT8 *)TcgEvent + sizeof(TCG_PCRINDEX) + sizeof(TCG_EVENTTYPE));
CopyMem (&EventSize, (UINT8 *)TcgEvent + sizeof(TCG_PCRINDEX) + sizeof(TCG_EVENTTYPE) + DigestListBinSize, sizeof(UINT32));
Status = TcgDxeLogEvent (
mTcg2EventInfo[Index].LogFormat,
TcgEvent,
sizeof(TCG_PCRINDEX) + sizeof(TCG_EVENTTYPE) + DigestListBinSize + sizeof(UINT32),
(UINT8 *)TcgEvent + sizeof(TCG_PCRINDEX) + sizeof(TCG_EVENTTYPE) + DigestListBinSize + sizeof(UINT32),
EventSize
);
break;
}
}
}
}
return Status;
}
/**
Measure and log an action string, and extend the measurement result into PCR[5].
@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
TcgMeasureAction (
IN CHAR8 *String
)
{
TCG_PCR_EVENT_HDR TcgEvent;
TcgEvent.PCRIndex = 5;
TcgEvent.EventType = EV_EFI_ACTION;
TcgEvent.EventSize = (UINT32)AsciiStrLen (String);
return TcgDxeHashLogExtendEvent (
0,
(UINT8*)String,
TcgEvent.EventSize,
&TcgEvent,
(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;
TCG_PCR_EVENT_HDR TcgEvent;
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)){
TcgEvent.PCRIndex = 1;
TcgEvent.EventType = EV_TABLE_OF_DEVICES;
TcgEvent.EventSize = sizeof (HandoffTables);
HandoffTables.NumberOfTables = 1;
HandoffTables.TableEntry[0].VendorGuid = gEfiMpServiceProtocolGuid;
HandoffTables.TableEntry[0].VendorTable = ProcessorLocBuf;
Status = TcgDxeHashLogExtendEvent (
0,
(UINT8*)(UINTN)ProcessorLocBuf,
sizeof(EFI_CPU_PHYSICAL_LOCATION) * ProcessorNum,
&TcgEvent,
(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 TPM_PCRINDEX PCRIndex
)
{
TCG_PCR_EVENT_HDR TcgEvent;
UINT32 EventData;
DEBUG ((EFI_D_INFO, "MeasureSeparatorEvent Pcr - %x\n", PCRIndex));
EventData = 0;
TcgEvent.PCRIndex = PCRIndex;
TcgEvent.EventType = EV_SEPARATOR;
TcgEvent.EventSize = (UINT32)sizeof (EventData);
return TcgDxeHashLogExtendEvent (
0,
(UINT8 *)&EventData,
sizeof (EventData),
&TcgEvent,
(UINT8 *)&EventData
);
}
/**
Measure and log an EFI variable, and extend the measurement result into a specific PCR.
@param[in] PCRIndex PCR 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 TPM_PCRINDEX PCRIndex,
IN TCG_EVENTTYPE EventType,
IN CHAR16 *VarName,
IN EFI_GUID *VendorGuid,
IN VOID *VarData,
IN UINTN VarSize
)
{
EFI_STATUS Status;
TCG_PCR_EVENT_HDR TcgEvent;
UINTN VarNameLength;
EFI_VARIABLE_DATA_TREE *VarLog;
DEBUG ((EFI_D_INFO, "Tcg2Dxe: MeasureVariable (Pcr - %x, EventType - %x, ", (UINTN)PCRIndex, (UINTN)EventType));
DEBUG ((EFI_D_INFO, "VariableName - %s, VendorGuid - %g)\n", VarName, VendorGuid));
VarNameLength = StrLen (VarName);
TcgEvent.PCRIndex = PCRIndex;
TcgEvent.EventType = EventType;
TcgEvent.EventSize = (UINT32)(sizeof (*VarLog) + VarNameLength * sizeof (*VarName) + VarSize
- sizeof (VarLog->UnicodeName) - sizeof (VarLog->VariableData));
VarLog = (EFI_VARIABLE_DATA_TREE *)AllocatePool (TcgEvent.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 (EFI_VARIABLE_DATA)
//
Status = TcgDxeHashLogExtendEvent (
0,
(UINT8*)VarLog,
TcgEvent.EventSize,
&TcgEvent,
(UINT8*)VarLog
);
} else {
Status = TcgDxeHashLogExtendEvent (
0,
(UINT8*)VarData,
VarSize,
&TcgEvent,
(UINT8*)VarLog
);
}
FreePool (VarLog);
return Status;
}
/**
Read then Measure and log an EFI variable, and extend the measurement result into a specific PCR.
@param[in] PCRIndex PCR 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 TPM_PCRINDEX PCRIndex,
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 (
PCRIndex,
EventType,
VarName,
VendorGuid,
*VarData,
*VarSize
);
return Status;
}
/**
Read then Measure and log an EFI boot variable, and extend the measurement result into PCR[5].
@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 (
5,
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 (
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);
}
}
}
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
)
{
TCG_PCR_EVENT_HDR TcgEvent;
TcgEvent.PCRIndex = 7;
TcgEvent.EventType = EV_EFI_ACTION;
TcgEvent.EventSize = sizeof(FIRMWARE_DEBUGGER_EVENT_STRING) - 1;
return TcgDxeHashLogExtendEvent (
0,
(UINT8 *)FIRMWARE_DEBUGGER_EVENT_STRING,
sizeof(FIRMWARE_DEBUGGER_EVENT_STRING) - 1,
&TcgEvent,
(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 ((EFI_D_INFO, "MeasureLaunchOfFirmwareDebugger - %r\n", Status));
}
Status = MeasureAllSecureVariables ();
DEBUG ((EFI_D_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 (7);
DEBUG ((EFI_D_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;
TPM_PCRINDEX PcrIndex;
PERF_START_EX (mImageHandle, "EventRec", "Tcg2Dxe", 0, PERF_ID_TCG2_DXE);
if (mBootAttempts == 0) {
//
// Measure handoff tables.
//
Status = MeasureHandoffTables ();
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "HOBs not Measured. Error!\n"));
}
//
// Measure BootOrder & Boot#### variables.
//
Status = MeasureAllBootVariables ();
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Boot Variables not Measured. Error!\n"));
}
//
// 1. This is the first boot attempt.
//
Status = TcgMeasureAction (
EFI_CALLING_EFI_APPLICATION
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_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 already done.
//
for (PcrIndex = 0; PcrIndex < 7; PcrIndex++) {
Status = MeasureSeparatorEvent (PcrIndex);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Seperator 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 = TcgMeasureAction (
EFI_RETURNING_FROM_EFI_APPLICATOIN
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "%a not Measured. Error!\n", EFI_RETURNING_FROM_EFI_APPLICATOIN));
}
}
DEBUG ((EFI_D_INFO, "TPM2 Tcg2Dxe Measure Data when ReadyToBoot\n"));
//
// Increase boot attempt counter.
//
mBootAttempts++;
PERF_END_EX (mImageHandle, "EventRec", "Tcg2Dxe", 0, PERF_ID_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 = TcgMeasureAction (
EFI_EXIT_BOOT_SERVICES_INVOCATION
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "%a not Measured. Error!\n", EFI_EXIT_BOOT_SERVICES_INVOCATION));
}
//
// Measure success of ExitBootServices
//
Status = TcgMeasureAction (
EFI_EXIT_BOOT_SERVICES_SUCCEEDED
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_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 = TcgMeasureAction (
EFI_EXIT_BOOT_SERVICES_FAILED
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "%a not Measured. Error!\n", EFI_EXIT_BOOT_SERVICES_FAILED));
}
}
/**
The function install Tcg2 protocol.
@retval EFI_SUCCESS Tcg2 protocol is installed.
@retval other Some error occurs.
**/
EFI_STATUS
InstallTcg2 (
VOID
)
{
EFI_STATUS Status;
EFI_HANDLE Handle;
Handle = NULL;
Status = gBS->InstallMultipleProtocolInterfaces (
&Handle,
&gEfiTcg2ProtocolGuid,
&mTcg2Protocol,
NULL
);
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;
UINT32 MaxCommandSize;
UINT32 MaxResponseSize;
UINTN Index;
EFI_TCG2_EVENT_ALGORITHM_BITMAP TpmHashAlgorithmBitmap;
UINT32 ActivePCRBanks;
UINT32 NumberOfPCRBanks;
mImageHandle = ImageHandle;
if (CompareGuid (PcdGetPtr(PcdTpmInstanceGuid), &gEfiTpmDeviceInstanceNoneGuid) ||
CompareGuid (PcdGetPtr(PcdTpmInstanceGuid), &gEfiTpmDeviceInstanceTpm12Guid)){
DEBUG ((EFI_D_ERROR, "No TPM2 instance required!\n"));
return EFI_UNSUPPORTED;
}
if (GetFirstGuidHob (&gTpmErrorHobGuid) != NULL) {
DEBUG ((EFI_D_ERROR, "TPM2 error!\n"));
return EFI_DEVICE_ERROR;
}
Status = Tpm2RequestUseTpm ();
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "TPM2 not detected!\n"));
return Status;
}
//
// Fill information
//
ASSERT (TCG_EVENT_LOG_AREA_COUNT_MAX == sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0]));
mTcgDxeData.BsCap.Size = sizeof(EFI_TCG2_BOOT_SERVICE_CAPABILITY);
mTcgDxeData.BsCap.ProtocolVersion.Major = 1;
mTcgDxeData.BsCap.ProtocolVersion.Minor = 1;
mTcgDxeData.BsCap.StructureVersion.Major = 1;
mTcgDxeData.BsCap.StructureVersion.Minor = 1;
DEBUG ((EFI_D_INFO, "Tcg2.ProtocolVersion - %02x.%02x\n", mTcgDxeData.BsCap.ProtocolVersion.Major, mTcgDxeData.BsCap.ProtocolVersion.Minor));
DEBUG ((EFI_D_INFO, "Tcg2.StructureVersion - %02x.%02x\n", mTcgDxeData.BsCap.StructureVersion.Major, mTcgDxeData.BsCap.StructureVersion.Minor));
Status = Tpm2GetCapabilityManufactureID (&mTcgDxeData.BsCap.ManufacturerID);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Tpm2GetCapabilityManufactureID fail!\n"));
} else {
DEBUG ((EFI_D_INFO, "Tpm2GetCapabilityManufactureID - %08x\n", mTcgDxeData.BsCap.ManufacturerID));
}
DEBUG_CODE (
UINT32 FirmwareVersion1;
UINT32 FirmwareVersion2;
Status = Tpm2GetCapabilityFirmwareVersion (&FirmwareVersion1, &FirmwareVersion2);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Tpm2GetCapabilityFirmwareVersion fail!\n"));
} else {
DEBUG ((EFI_D_INFO, "Tpm2GetCapabilityFirmwareVersion - %08x %08x\n", FirmwareVersion1, FirmwareVersion2));
}
);
Status = Tpm2GetCapabilityMaxCommandResponseSize (&MaxCommandSize, &MaxResponseSize);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Tpm2GetCapabilityMaxCommandResponseSize fail!\n"));
} else {
mTcgDxeData.BsCap.MaxCommandSize = (UINT16)MaxCommandSize;
mTcgDxeData.BsCap.MaxResponseSize = (UINT16)MaxResponseSize;
DEBUG ((EFI_D_INFO, "Tpm2GetCapabilityMaxCommandResponseSize - %08x, %08x\n", MaxCommandSize, MaxResponseSize));
}
//
// Get supported PCR and current Active PCRs
//
Status = Tpm2GetCapabilitySupportedAndActivePcrs (&TpmHashAlgorithmBitmap, &ActivePCRBanks);
ASSERT_EFI_ERROR (Status);
mTcgDxeData.BsCap.HashAlgorithmBitmap = TpmHashAlgorithmBitmap & PcdGet32 (PcdTcg2HashAlgorithmBitmap);
mTcgDxeData.BsCap.ActivePcrBanks = ActivePCRBanks & PcdGet32 (PcdTcg2HashAlgorithmBitmap);
//
// Need calculate NumberOfPCRBanks here, because HashAlgorithmBitmap might be removed by PCD.
//
NumberOfPCRBanks = 0;
for (Index = 0; Index < 32; Index++) {
if ((mTcgDxeData.BsCap.HashAlgorithmBitmap & (1u << Index)) != 0) {
NumberOfPCRBanks++;
}
}
if (PcdGet32 (PcdTcg2NumberOfPCRBanks) == 0) {
mTcgDxeData.BsCap.NumberOfPCRBanks = NumberOfPCRBanks;
} else {
mTcgDxeData.BsCap.NumberOfPCRBanks = PcdGet32 (PcdTcg2NumberOfPCRBanks);
if (PcdGet32 (PcdTcg2NumberOfPCRBanks) > NumberOfPCRBanks) {
DEBUG ((EFI_D_ERROR, "ERROR: PcdTcg2NumberOfPCRBanks(0x%x) > NumberOfPCRBanks(0x%x)\n", PcdGet32 (PcdTcg2NumberOfPCRBanks), NumberOfPCRBanks));
mTcgDxeData.BsCap.NumberOfPCRBanks = NumberOfPCRBanks;
}
}
mTcgDxeData.BsCap.SupportedEventLogs = EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2 | EFI_TCG2_EVENT_LOG_FORMAT_TCG_2;
if ((mTcgDxeData.BsCap.ActivePcrBanks & EFI_TCG2_BOOT_HASH_ALG_SHA1) == 0) {
//
// No need to expose TCG1.2 event log if SHA1 bank does not exist.
//
mTcgDxeData.BsCap.SupportedEventLogs &= ~EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2;
}
DEBUG ((EFI_D_INFO, "Tcg2.SupportedEventLogs - 0x%08x\n", mTcgDxeData.BsCap.SupportedEventLogs));
DEBUG ((EFI_D_INFO, "Tcg2.HashAlgorithmBitmap - 0x%08x\n", mTcgDxeData.BsCap.HashAlgorithmBitmap));
DEBUG ((EFI_D_INFO, "Tcg2.NumberOfPCRBanks - 0x%08x\n", mTcgDxeData.BsCap.NumberOfPCRBanks));
DEBUG ((EFI_D_INFO, "Tcg2.ActivePcrBanks - 0x%08x\n", mTcgDxeData.BsCap.ActivePcrBanks));
if (mTcgDxeData.BsCap.TPMPresentFlag) {
//
// Setup the log area and copy event log from hob list to it
//
Status = SetupEventLog ();
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 Tcg2Protocol
//
Status = InstallTcg2 ();
DEBUG ((EFI_D_INFO, "InstallTcg2 - %r\n", Status));
return Status;
}
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