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|
/** @file
This file is SampleCode for Boot Guard TPM event log.
@copyright
Copyright (c) 2013 Intel Corporation. All rights reserved
This software and associated documentation (if any) is furnished
under a license and may only be used or copied in accordance
with the terms of the license. Except as permitted by such
license, no part of this software or documentation may be
reproduced, stored in a retrieval system, or transmitted in any
form or by any means without the express written consent of
Intel Corporation.
This file contains a 'Sample Driver' and is licensed as such
under the terms of your license agreement with Intel or your
vendor. This file may be modified by the user, subject to
the additional terms of the license agreement
**/
#if !defined(EDK_RELEASE_VERSION) || (EDK_RELEASE_VERSION < 0x00020000)
#include "EdkIIGlueBase.h"
#include "EdkIIGluePeim.h"
#include "CpuAccess.h"
#endif
#include <EfiTpm.h>
#include "BootGuardTpmEventLogLib.h"
//
// Data structure definition
//
#pragma pack (1)
#define BASE_4GB 0x0000000100000000ULL
//
// FIT definition
//
#define FIT_TABLE_TYPE_HEADER 0x0
#define FIT_TABLE_TYPE_MICROCODE 0x1
#define FIT_TABLE_TYPE_STARTUP_ACM 0x2
#define FIT_TABLE_TYPE_BIOS_MODULE 0x7
#define FIT_TABLE_TYPE_KEY_MANIFEST 0xB
#define FIT_TABLE_TYPE_BOOT_POLICY_MANIFEST 0xC
typedef struct {
UINT64 Address;
UINT8 Size[3];
UINT8 Reserved;
UINT16 Version;
UINT8 Type : 7;
UINT8 Cv : 1;
UINT8 Chksum;
} FIRMWARE_INTERFACE_TABLE_ENTRY;
//
// ACM definition
//
#define MMIO_ACM_STATUS (TXT_PUBLIC_BASE + R_CPU_BOOT_GUARD_ACM_STATUS)
#define ACM_KEY_HASH_MMIO_ADDR_0 0xFED30400
#define ACM_KEY_HASH_MMIO_ADDR_1 (ACM_KEY_HASH_MMIO_ADDR_0 + 8)
#define ACM_KEY_HASH_MMIO_ADDR_2 (ACM_KEY_HASH_MMIO_ADDR_0 + 16)
#define ACM_KEY_HASH_MMIO_ADDR_3 (ACM_KEY_HASH_MMIO_ADDR_0 + 24)
#define ACM_PKCS_1_5_RSA_SIGNATURE_SIZE 256
#define ACM_HEADER_FLAG_DEBUG_SIGNED BIT15
#define ACM_NPW_SVN 0x2
typedef struct {
UINT32 ModuleType;
UINT32 HeaderLen;
UINT32 HeaderVersion;
UINT16 ChipsetId;
UINT16 Flags;
UINT32 ModuleVendor;
UINT32 Date;
UINT32 Size;
UINT16 AcmSvn;
UINT16 Reserved1;
UINT32 CodeControl;
UINT32 ErrorEntryPoint;
UINT32 GdtLimit;
UINT32 GdtBasePtr;
UINT32 SegSel;
UINT32 EntryPoint;
UINT8 Reserved2[64];
UINT32 KeySize;
UINT32 ScratchSize;
UINT8 RsaPubKey[64 * 4];
UINT32 RsaPubExp;
UINT8 RsaSig[256];
} ACM_FORMAT;
//
// Manifest definition
//
#define SHA256_DIGEST_SIZE 32
typedef struct {
UINT16 HashAlg;
UINT16 Size;
UINT8 HashBuffer[SHA256_DIGEST_SIZE];
} HASH_STRUCTURE;
#define RSA_PUBLIC_KEY_STRUCT_KEY_SIZE_DEFAULT 2048
#define RSA_PUBLIC_KEY_STRUCT_KEY_LEN_DEFAULT (RSA_PUBLIC_KEY_STRUCT_KEY_SIZE_DEFAULT/8)
typedef struct {
UINT8 Version;
UINT16 KeySize;
UINT32 Exponent;
UINT8 Modulus[RSA_PUBLIC_KEY_STRUCT_KEY_LEN_DEFAULT];
} RSA_PUBLIC_KEY_STRUCT;
#define RSASSA_SIGNATURE_STRUCT_KEY_SIZE_DEFAULT 2048
#define RSASSA_SIGNATURE_STRUCT_KEY_LEN_DEFAULT (RSASSA_SIGNATURE_STRUCT_KEY_SIZE_DEFAULT/8)
typedef struct {
UINT8 Version;
UINT16 KeySize;
UINT16 HashAlg;
UINT8 Signature[RSASSA_SIGNATURE_STRUCT_KEY_LEN_DEFAULT];
} RSASSA_SIGNATURE_STRUCT;
typedef struct {
UINT8 Version;
UINT16 KeyAlg;
RSA_PUBLIC_KEY_STRUCT Key;
UINT16 SigScheme;
RSASSA_SIGNATURE_STRUCT Signature;
} KEY_SIGNATURE_STRUCT;
#define BOOT_POLICY_MANIFEST_HEADER_STRUCTURE_ID (*(UINT64 *)"__ACBP__")
typedef struct {
UINT8 StructureId[8];
UINT8 StructVersion;
UINT8 HdrStructVersion;
UINT8 PMBPMVersion;
UINT8 BPSVN;
UINT8 ACMSVN;
UINT8 Reserved;
UINT16 NEMDataStack;
} BOOT_POLICY_MANIFEST_HEADER;
#define IBB_SEGMENT_FLAG_IBB 0x0
#define IBB_SEGMENT_FLAG_NON_IBB 0x1
typedef struct {
UINT8 Reserved[2];
UINT16 Flags;
UINT32 Base;
UINT32 Size;
} IBB_SEGMENT_ELEMENT;
#define BOOT_POLICY_MANIFEST_IBB_ELEMENT_STRUCTURE_ID (*(UINT64 *)"__IBBS__")
#define IBB_FLAG_AUTHORITY_MEASURE 0x4
typedef struct {
UINT8 StructureId[8];
UINT8 StructVersion;
UINT8 Reserved1[2];
UINT8 PbetValue;
UINT32 Flags;
UINT64 IbbMchBar;
UINT64 VtdBar;
UINT32 PmrlBase;
UINT32 PmrlLimit;
UINT64 Reserved2[2];
HASH_STRUCTURE PostIbbHash;
UINT32 EntryPoint;
HASH_STRUCTURE Digest;
UINT8 SegmentCount;
IBB_SEGMENT_ELEMENT IbbSegment[1];
} IBB_ELEMENT;
#define BOOT_POLICY_MANIFEST_PLATFORM_MANUFACTURER_ELEMENT_STRUCTURE_ID (*(UINT64 *)"__PMDA__")
typedef struct {
UINT8 StructureId[8];
UINT8 StructVersion;
UINT16 PmDataSize;
} PLATFORM_MANUFACTURER_ELEMENT;
#define BOOT_POLICY_MANIFEST_SIGNATURE_ELEMENT_STRUCTURE_ID (*(UINT64 *)"__PMSG__")
typedef struct {
UINT8 StructureId[8];
UINT8 StructVersion;
KEY_SIGNATURE_STRUCT KeySignature;
} BOOT_POLICY_MANIFEST_SIGNATURE_ELEMENT;
#define KEY_MANIFEST_STRUCTURE_ID (*(UINT64 *)"__KEYM__")
typedef struct {
UINT8 StructureId[8];
UINT8 StructVersion;
UINT8 KeyManifestVersion;
UINT8 KmSvn;
UINT8 KeyManifestId;
HASH_STRUCTURE BpKey;
KEY_SIGNATURE_STRUCT KeyManifestSignature;
} KEY_MANIFEST_STRAUCTURE;
//
// DetailPCR data
//
typedef struct {
UINT8 BpRstrLow;
UINT8 BpTypeLow;
UINT16 AcmSvn;
UINT8 AcmRsaSignature[ACM_PKCS_1_5_RSA_SIGNATURE_SIZE];
UINT8 KmRsaSignature[RSASSA_SIGNATURE_STRUCT_KEY_LEN_DEFAULT];
UINT8 BpmRsaSignature[RSASSA_SIGNATURE_STRUCT_KEY_LEN_DEFAULT];
UINT8 IbbHash[SHA256_DIGEST_SIZE];
} DETAIL_PCR_DATA;
//
// AuthorityPCR data
//
typedef struct {
UINT8 BpRstrLow;
UINT8 BpTypeLow;
UINT16 AcmSvn;
UINT8 AcmKeyHash[SHA256_DIGEST_SIZE];
UINT8 BpKeyHash[SHA256_DIGEST_SIZE];
UINT8 BpmKeyHashFromKm[SHA256_DIGEST_SIZE];
UINT8 VerifiedBoot;
} AUTHORITY_PCR_DATA;
//
// Boot Policy Restrictions definition
//
typedef union {
struct {
UINT8 Facb : 1;
UINT8 Dcd : 1;
UINT8 Dbi : 1;
UINT8 Pbe : 1;
UINT8 Bbp : 1;
UINT8 Reserved : 2;
UINT8 BpInvd : 1;
} Bits;
UINT8 Data;
} BP_RSTR_LOW;
//
// Boot Policy Type definition
//
typedef union {
struct {
UINT8 MeasuredBoot : 1;
UINT8 VerifiedBoot : 1;
UINT8 Hap : 1;
UINT8 Reserved : 5;
} Bits;
UINT8 Data;
} BP_TYPE_LOW;
#pragma pack ()
//
// OEM_IMPLEMENTATION_BEGIN
//
// SHA calculation and TPM functions are OEM Core/Platform code depended,
// OEM can customize these empty functions for their specific.
//
// For the detail of SHA algorithm, please refer to FIPS PUB 180-2.
// For TPM event log, please refer to TCG EFI Protocol Specification.
//
//
// Null-defined macro for passing EDK build
//
#define SHA_INIT
#define SHA_UPDATE
#define SHA_FINAL
/**
Calculate SHA-1 Hash
@param[in] Data Data to be hashed.
@param[in] Size Size of data.
@param[out] Digest SHA-1 digest value.
**/
VOID
CreateSha1Hash (
IN UINT8 *Data,
IN UINTN Size,
OUT UINT8 *Digest
)
{
VOID *Context;
SHA_INIT (Context);
SHA_UPDATE (Context, Data, Size);
SHA_FINAL (Context, Digest);
return;
}
/**
Calculate SHA256 Hash
@param[in] Data Data to be hashed.
@param[in] Size Size of data.
@param[out] Digest SHA256 digest value.
**/
VOID
CreateSha256Hash (
IN UINT8 *Data,
IN UINTN Size,
OUT UINT8 *Digest
)
{
VOID *Context;
SHA_INIT (Context);
SHA_UPDATE (Context, Data, Size);
SHA_FINAL (Context, Digest);
return;
}
/**
Add a new entry to the Event Log.
@param[in] 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
LogEvent (
IN TCG_PCR_EVENT_HDR *NewEventHdr,
IN UINT8 *NewEventData
)
{
return EFI_SUCCESS;
}
//
// OEM_IMPLEMENTATION_END
//
/**
Find FIT Entry address data by type
@param[in] Type FIT Entry type
@return FIT entry address
**/
VOID *
FindFitEntryData (
IN UINT8 Type
)
{
FIRMWARE_INTERFACE_TABLE_ENTRY *FitEntry;
UINT32 EntryNum;
UINT64 FitTableOffset;
UINT32 Index;
FitTableOffset = *(UINT64 *)(UINTN)(BASE_4GB - 0x40);
FitEntry = (FIRMWARE_INTERFACE_TABLE_ENTRY *)(UINTN)FitTableOffset;
if (FitEntry[0].Address != *(UINT64 *)"_FIT_ ") {
return NULL;
}
if (FitEntry[0].Type != FIT_TABLE_TYPE_HEADER) {
return NULL;
}
EntryNum = *(UINT32 *)(&FitEntry[0].Size[0]) & 0xFFFFFF;
for (Index = 0; Index < EntryNum; Index++) {
if (FitEntry[Index].Type == Type) {
return (VOID *)(UINTN)FitEntry[Index].Address;
}
}
return NULL;
}
/**
Find the address of ACM.
@return A pointer to ACM.
**/
VOID *
FindAcm (
VOID
)
{
return FindFitEntryData (FIT_TABLE_TYPE_STARTUP_ACM);
}
/**
Find the address of Boot Policy Manifest.
@return A pointer to Key Manifest data structure.
**/
VOID *
FindBpm (
VOID
)
{
return FindFitEntryData (FIT_TABLE_TYPE_BOOT_POLICY_MANIFEST);
}
/**
Find the address of Key Manifest.
@return A pointer to Key Manifest data structure.
**/
VOID *
FindKm (
VOID
)
{
return FindFitEntryData (FIT_TABLE_TYPE_KEY_MANIFEST);
}
/**
Find BPM element by structureID
@param[in] Bpm A pointer to BPM data structure.
@param[in] StructureId BPM element StructureID
@return A pointer to BPM element data structure.
**/
VOID *
FindBpmElement (
IN BOOT_POLICY_MANIFEST_HEADER *Bpm,
IN UINT64 StructureId
)
{
BOOT_POLICY_MANIFEST_HEADER *BpmHeader;
IBB_ELEMENT *IbbElement;
PLATFORM_MANUFACTURER_ELEMENT *PmElement;
BOOT_POLICY_MANIFEST_SIGNATURE_ELEMENT *BpmSignatureElement;
UINT8 *Buffer;
Buffer = (UINT8 *)Bpm;
BpmHeader = (BOOT_POLICY_MANIFEST_HEADER *)Buffer;
if (*(UINT64 *)BpmHeader->StructureId != BOOT_POLICY_MANIFEST_HEADER_STRUCTURE_ID) {
return NULL;
}
if (StructureId == BOOT_POLICY_MANIFEST_HEADER_STRUCTURE_ID) {
return Buffer;
}
Buffer += sizeof(BOOT_POLICY_MANIFEST_HEADER);
IbbElement = (IBB_ELEMENT *)Buffer;
if (*(UINT64 *)IbbElement->StructureId != BOOT_POLICY_MANIFEST_IBB_ELEMENT_STRUCTURE_ID) {
return NULL;
}
if (StructureId == BOOT_POLICY_MANIFEST_IBB_ELEMENT_STRUCTURE_ID) {
return Buffer;
}
Buffer += sizeof(IBB_ELEMENT) + sizeof(IBB_SEGMENT_ELEMENT) * (IbbElement->SegmentCount - 1);
PmElement = (PLATFORM_MANUFACTURER_ELEMENT *)Buffer;
while (*(UINT64 *)PmElement->StructureId == BOOT_POLICY_MANIFEST_PLATFORM_MANUFACTURER_ELEMENT_STRUCTURE_ID) {
if (StructureId == BOOT_POLICY_MANIFEST_PLATFORM_MANUFACTURER_ELEMENT_STRUCTURE_ID) {
return Buffer;
}
Buffer += sizeof(PLATFORM_MANUFACTURER_ELEMENT) + PmElement->PmDataSize;
PmElement = (PLATFORM_MANUFACTURER_ELEMENT *)Buffer;
}
BpmSignatureElement = (BOOT_POLICY_MANIFEST_SIGNATURE_ELEMENT *)Buffer;
if (*(UINT64 *)BpmSignatureElement->StructureId != BOOT_POLICY_MANIFEST_SIGNATURE_ELEMENT_STRUCTURE_ID) {
return NULL;
}
if (StructureId == BOOT_POLICY_MANIFEST_SIGNATURE_ELEMENT_STRUCTURE_ID) {
return Buffer;
}
return NULL;
}
/**
Find BPM IBB element
@param[in] Bpm A pointer to BPM data structure.
@return A pointer to BPM IBB element data structure.
**/
VOID *
FindBpmIbb (
IN BOOT_POLICY_MANIFEST_HEADER *Bpm
)
{
return FindBpmElement (Bpm, BOOT_POLICY_MANIFEST_IBB_ELEMENT_STRUCTURE_ID);
}
/**
Find BPM Signature element
@param[in] Bpm BPM address
@return BPM Signature element
**/
VOID *
FindBpmSignature (
IN BOOT_POLICY_MANIFEST_HEADER *Bpm
)
{
return FindBpmElement (Bpm, BOOT_POLICY_MANIFEST_SIGNATURE_ELEMENT_STRUCTURE_ID);
}
/**
Check if ACM is a NPW ACM.
@retval TRUE It is a NPW ACM
@retval FALSE It is NOT a NPW ACM
**/
BOOLEAN
IsNpwAcm (
VOID
)
{
ACM_FORMAT *Acm;
Acm = FindAcm ();
ASSERT (Acm != NULL);
if (Acm == NULL) {
return FALSE;
}
if (((Acm->Flags & ACM_HEADER_FLAG_DEBUG_SIGNED) == 0) && (Acm->AcmSvn < ACM_NPW_SVN)) {
return TRUE;
} else {
return FALSE;
}
}
/**
Check if Boot Guard verifies the IBB.
@retval TRUE It is VerifiedBoot
@retval FALSE It is NOT VerifiedBoot
**/
BOOLEAN
IsVerifiedBoot (
VOID
)
{
if ((AsmReadMsr64 (MSR_BOOT_GUARD_SACM_INFO) & B_VERIFIED) != 0) {
return TRUE;
} else {
return FALSE;
}
}
/**
Check if Boot Guard measures IBB into TPM's PCRs.
@retval TRUE It is MeasuredBoot
@retval FALSE It is NOT MeasuredBoot
**/
BOOLEAN
IsMeasuredBoot (
VOID
)
{
if ((AsmReadMsr64 (MSR_BOOT_GUARD_SACM_INFO) & B_MEASURED) != 0) {
return TRUE;
} else {
return FALSE;
}
}
/**
Get the lower 8 bits of Boot Policy Restrictions
@return The lower 8 bits of BP.RSTR
**/
UINT8
GetBpRstrLow (
VOID
)
{
BP_RSTR_LOW BpRstr;
UINT32 AcmStatus;
UINT64 SacmInfo;
AcmStatus = MmioRead32 (MMIO_ACM_STATUS);
SacmInfo = AsmReadMsr64 (MSR_BOOT_GUARD_SACM_INFO);
BpRstr.Bits.Facb = (UINT8)((SacmInfo & BIT4) >> 4);
BpRstr.Bits.Dcd = (UINT8)((AcmStatus & BIT21) >> 21);
BpRstr.Bits.Dbi = (UINT8)((AcmStatus & BIT22) >> 22);
BpRstr.Bits.Pbe = (UINT8)((AcmStatus & BIT23) >> 23);
BpRstr.Bits.Bbp = (UINT8)((AcmStatus & BIT24) >> 24);
BpRstr.Bits.Reserved = 0;
BpRstr.Bits.BpInvd = 0;
return BpRstr.Data;
}
/**
Get the lower 8 bits of Boot Policy Type
@return The lower 8 bits of BP.TYPE
**/
UINT8
GetBpTypeLow (
VOID
)
{
BP_TYPE_LOW BpType;
UINT32 AcmStatus;
UINT64 SacmInfo;
AcmStatus = MmioRead32 (MMIO_ACM_STATUS);
SacmInfo = AsmReadMsr64 (MSR_BOOT_GUARD_SACM_INFO);
BpType.Bits.MeasuredBoot = (UINT8)((SacmInfo & BIT5) >> 5);
BpType.Bits.VerifiedBoot = (UINT8)((SacmInfo & BIT6) >> 6);
BpType.Bits.Hap = (UINT8)((AcmStatus & BIT20) >> 20);
BpType.Bits.Reserved = 0;
return BpType.Data;
}
/**
Calculate IBB Hash
@param[in] BpmIbb A pointer to BPM IBB element data structure.
@param[out] Digest IBB digest value.
**/
VOID
CreateIbbHash (
IN IBB_ELEMENT *BpmIbb,
OUT UINT8 *Digest
)
{
VOID *Context;
UINTN Index;
SHA_INIT (Context);
for (Index = 0; Index < BpmIbb->SegmentCount; Index++) {
if (BpmIbb->IbbSegment[Index].Flags == IBB_SEGMENT_FLAG_IBB) {
SHA_UPDATE (Context, (VOID *)(UINTN)BpmIbb->IbbSegment[Index].Base, BpmIbb->IbbSegment[Index].Size);
}
}
SHA_FINAL (Context, Digest);
return;
}
/**
Calculate DetailPCR extend value
@param[out] Digest DetailPCR digest
**/
VOID
CaculateDetailPCRExtendValue (
OUT TCG_DIGEST *Digest
)
{
ACM_FORMAT *Acm;
KEY_MANIFEST_STRAUCTURE *Km;
BOOT_POLICY_MANIFEST_HEADER *Bpm;
IBB_ELEMENT *BpmIbb;
BOOT_POLICY_MANIFEST_SIGNATURE_ELEMENT *BpmSignature;
DETAIL_PCR_DATA DetailPcrData;
Acm = FindAcm ();
ASSERT (Acm != NULL);
Km = FindKm ();
ASSERT (Km != NULL);
Bpm = FindBpm ();
ASSERT (Bpm != NULL);
BpmIbb = FindBpmIbb (Bpm);
ASSERT (BpmIbb != NULL);
BpmSignature = FindBpmSignature (Bpm);
ASSERT (BpmSignature != NULL);
DetailPcrData.BpRstrLow = GetBpRstrLow ();
DetailPcrData.BpTypeLow = GetBpTypeLow ();
DetailPcrData.AcmSvn = Acm->AcmSvn;
CopyMem (&DetailPcrData.AcmRsaSignature, &Acm->RsaSig, sizeof(DetailPcrData.AcmRsaSignature));
CopyMem (&DetailPcrData.KmRsaSignature, &Km->KeyManifestSignature.Signature.Signature, sizeof(DetailPcrData.KmRsaSignature));
CopyMem (&DetailPcrData.BpmRsaSignature, &BpmSignature->KeySignature.Signature.Signature, sizeof(DetailPcrData.BpmRsaSignature));
if (IsVerifiedBoot ()) {
CopyMem (&DetailPcrData.IbbHash, &BpmIbb->Digest.HashBuffer, sizeof(DetailPcrData.IbbHash));
} else {
//
// Calculate IBB hash because it is NOT verified boot, the Digest from IBB can not be trust.
//
CreateIbbHash (BpmIbb, (UINT8 *)&DetailPcrData.IbbHash);
}
CreateSha1Hash ((UINT8 *)&DetailPcrData, sizeof(DetailPcrData), (UINT8 *)Digest);
}
/**
Calculate AuthorityPCR extend value
@param[out] Digest AuthorityPCR digest
**/
VOID
CaculateAuthorityPCRExtendValue (
OUT TCG_DIGEST *Digest
)
{
ACM_FORMAT *Acm;
KEY_MANIFEST_STRAUCTURE *Km;
AUTHORITY_PCR_DATA AuthorityPcrData;
Acm = FindAcm ();
ASSERT (Acm != NULL);
Km = FindKm ();
ASSERT (Km != NULL);
AuthorityPcrData.BpRstrLow = GetBpRstrLow ();
AuthorityPcrData.BpTypeLow = GetBpTypeLow ();
AuthorityPcrData.AcmSvn = Acm->AcmSvn;
//
// Get ACM Key hash
//
*(UINT64 *)&AuthorityPcrData.AcmKeyHash[0] = MmioRead64 (ACM_KEY_HASH_MMIO_ADDR_0);
*(UINT64 *)&AuthorityPcrData.AcmKeyHash[8] = MmioRead64 (ACM_KEY_HASH_MMIO_ADDR_1);
*(UINT64 *)&AuthorityPcrData.AcmKeyHash[16] = MmioRead64 (ACM_KEY_HASH_MMIO_ADDR_2);
*(UINT64 *)&AuthorityPcrData.AcmKeyHash[24] = MmioRead64 (ACM_KEY_HASH_MMIO_ADDR_3);
//
// Calculate BP Key hash
//
CreateSha256Hash ((UINT8 *)&Km->KeyManifestSignature.Key.Modulus, sizeof(Km->KeyManifestSignature.Key.Modulus), (UINT8 *)&AuthorityPcrData.BpKeyHash);
CopyMem (&AuthorityPcrData.BpmKeyHashFromKm, &Km->BpKey.HashBuffer, sizeof(AuthorityPcrData.BpmKeyHashFromKm));
if (IsVerifiedBoot ()) {
AuthorityPcrData.VerifiedBoot = 0;
} else {
AuthorityPcrData.VerifiedBoot = 1;
}
CreateSha1Hash ((UINT8 *)&AuthorityPcrData, sizeof(AuthorityPcrData), (UINT8 *)Digest);
}
/**
Check if we need AuthorityPCR measurement
@retval TRUE Need AuthorityPCR measurement
@retval FALSE Do NOT need AuthorityPCR measurement
**/
BOOLEAN
NeedAuthorityMeasure (
VOID
)
{
BOOT_POLICY_MANIFEST_HEADER *Bpm;
IBB_ELEMENT *BpmIbb;
Bpm = FindBpm ();
ASSERT (Bpm != NULL);
BpmIbb = FindBpmIbb (Bpm);
ASSERT (BpmIbb != NULL);
if ((BpmIbb->Flags & IBB_FLAG_AUTHORITY_MEASURE) != 0) {
return TRUE;
} else {
return FALSE;
}
}
/**
Create DetailPCR event log
@param[in] TpmType TPM type
**/
VOID
CreateDetailPcrEvent (
IN TPM_TYPE TpmType
)
{
TCG_PCR_EVENT_HDR NewEventHdr;
NewEventHdr.PCRIndex = 0;
NewEventHdr.EventType = EV_S_CRTM_CONTENTS;
CaculateDetailPCRExtendValue (&NewEventHdr.Digest);
if (IsNpwAcm()) {
NewEventHdr.EventSize = sizeof ("Boot Guard Debug Measured S-CRTM");
LogEvent (&NewEventHdr, "Boot Guard Debug Measured S-CRTM");
} else {
NewEventHdr.EventSize = sizeof ("Boot Guard Measured S-CRTM");
LogEvent (&NewEventHdr, "Boot Guard Measured S-CRTM");
}
}
/**
Create AuthorityPCR event log
@param[in] TpmType TPM type
**/
VOID
CreateAuthorityPcrEvent (
IN TPM_TYPE TpmType
)
{
TCG_PCR_EVENT_HDR NewEventHdr;
if (NeedAuthorityMeasure() && IsVerifiedBoot()) {
if (TpmType == dTpm12) {
NewEventHdr.PCRIndex = 6;
} else {
NewEventHdr.PCRIndex = 7;
}
NewEventHdr.EventType = EV_EFI_VARIABLE_DRIVER_CONFIG;
CaculateAuthorityPCRExtendValue (&NewEventHdr.Digest);
if (IsNpwAcm()) {
NewEventHdr.EventSize = sizeof (L"Boot Guard Debug Measured S-CRTM");
LogEvent (&NewEventHdr, (UINT8 *)L"Boot Guard Debug Measured S-CRTM");
} else {
NewEventHdr.EventSize = sizeof (L"Boot Guard Measured S-CRTM");
LogEvent (&NewEventHdr, (UINT8 *)L"Boot Guard Measured S-CRTM");
}
}
}
/**
Create Boot Guard TPM event log
@param[in] TpmType Which type of TPM is available on system.
**/
VOID
CreateTpmEventLog (
IN TPM_TYPE TpmType
)
{
if (IsMeasuredBoot()) {
CreateDetailPcrEvent (TpmType);
CreateAuthorityPcrEvent (TpmType);
}
}
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