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//*************************************************************************
//*************************************************************************
//** **
//** (C)Copyright 1985-2013, American Megatrends, Inc. **
//** **
//** All Rights Reserved. **
//** **
//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 **
//** **
//** Phone: (770)-246-8600 **
//** **
//*************************************************************************
//**********************************************************************
// $Header: /Alaska/SOURCE/Modules/SharkBayRefCodes/FIT/Pei/BootGuardPei.c 2 3/07/13 5:43a Bensonlai $
//
// $Revision: 2 $
//
// $Date: 3/07/13 5:43a $
//**********************************************************************
// Revision History
// ----------------
// $Log: /Alaska/SOURCE/Modules/SharkBayRefCodes/FIT/Pei/BootGuardPei.c $
//
// 2 3/07/13 5:43a Bensonlai
// [TAG] EIP117307
// [Category] Improvement
// [Description] [Boot Guard] Implementation of speed up the post time
// for Chain of Trust
// [Files] BootGuardDxe.h, BootGuardPei.c, BootGuardPei.h,
// BpmKmGen.exe, ReserveBootGuardFvMainHashKey.bin
//
// 1 2/25/13 1:15a Bensonlai
// [TAG] EIP114386
// [Category] Spec Update
// [Severity] Important
// [Description] [SBY] Ultrabook for Shark Bay Platform - : Boot Guard
// for 4th Gen Intel Core Processor based on Mobile U-Processor Line -
// BIOS Writer's Guide - Rev 0.8.1
// [Files] BootGuardPei.cif
// BootGuardPei.c
// BootGuardPei.h
// BootGuardPei.dxs
// BootGuardPei.sdl
// BootGuardPei.mak
// PeiCryptLib.lib
// OpensslLib.lib
//
//*************************************************************************
//<AMI_FHDR_START>
//
// Name: BootGuardPei.c
//
// Description: Chain of trust for Pei
//
//<AMI_FHDR_END>
//*************************************************************************
#include "BootGuardPei.h"
EFI_GUID ReserveBootGuardFvMainHashKeyGuid = RESERVE_BOOT_GUARD_FV_MAIN_HASH_KEY_FFS_FILE_RAW_GUID;
STATIC EFI_PEI_NOTIFY_DESCRIPTOR BootGuardVerificationForPeiToDxeHandoffEndOfPeiNotifyDesc = {
(EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEndOfPeiSignalPpiGuid,
BootGuardVerificationForPeiToDxeHandoffEndOfPei
};
//**********************************************************************
//<AMI_PHDR_START>
//
// Procedure: LocateBootGuardFvMainHashKey
//
// Description: Loads binary from RAW section of X firwmare volume
//
//
// Output: Buffer - returns a pointer to allocated memory. Caller
// must free it when done.
// Size - returns the size of the binary loaded into the
// buffer.
//
//<AMI_PHDR_END>
//**********************************************************************
EFI_STATUS
LocateBootGuardFvMainHashKey (
IN EFI_PEI_SERVICES **PpSv,
IN OUT VOID **Buffer
)
{
EFI_STATUS Status;
EFI_FIRMWARE_VOLUME_HEADER *pFV;
UINTN FvNum=0;
EFI_FFS_FILE_HEADER *ppFile=NULL;
BOOLEAN Found = FALSE;
Status = (*PpSv)->FfsFindNextVolume (PpSv, FvNum, &pFV);
while ( TRUE ) {
Status = (*PpSv)->FfsFindNextVolume( PpSv, FvNum, &pFV );
if ( EFI_ERROR( Status ) ) {
return Status;
}
ppFile = NULL;
while ( TRUE ) {
Status = (*PpSv)->FfsFindNextFile( PpSv,
EFI_FV_FILETYPE_FREEFORM,
pFV,
&ppFile );
if ( Status == EFI_NOT_FOUND ) {
break;
}
if (CompareGuid( &ppFile->Name, &ReserveBootGuardFvMainHashKeyGuid )) {
Found = TRUE;
break;
}
}
if ( Found ) {
break;
} else {
FvNum++;
}
}
Status = (*PpSv)->FfsFindSectionData( PpSv,
EFI_SECTION_RAW,
ppFile,
Buffer );
if ( EFI_ERROR( Status ) ) {
return EFI_NOT_FOUND;
}
return Status;
}
//**********************************************************************
//<AMI_PHDR_START>
//
// Procedure: BootGuardVerificationForPeiToDxeHandoffEndOfPei
//
// Description: BootGuardVerificationForPeiToDxeHandoffEndOfPei at end of Pei
// handler.
//
// Output: PeiServices - Pointer to PEI Services Table.
// NotifyDesc - Pointer to the descriptor for the Notification
// event that caused this function to execute.
// Ppi - Pointer to the PPI data associated with
// this function.
//
//<AMI_PHDR_END>
//**********************************************************************
STATIC
EFI_STATUS
BootGuardVerificationForPeiToDxeHandoffEndOfPei (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDesc,
IN VOID *Ppi
)
{
EFI_STATUS Status;
UINTN BootGuardHashDataSize = 0, i;
UINT8 CurrentBootGuardFvMainHash256Val[32];
VOID *BootGuardSha256Context;
UINT8 *BootGuardOrgFvMainHash256;
AMI_BOOT_GUARD_HOB *AmiBootGuardHobPtr;
EFI_GUID AmiBootGuardHobGuid = AMI_BOOT_GUARD_HOB_GUID;
EFI_BOOT_MODE BootMode;
RESERVE_BOOT_GUARD_FV_MAIN_HASH_KEY *ReserveBootGuardFvMainHashKey;
Status = PeiServicesGetBootMode (&BootMode);
if ( EFI_ERROR( Status ) ) {
DEBUG ((EFI_D_ERROR, "[BootGuardPei.c] Get Boot Mode is fail\n"));
return Status;
}
if ( BootMode == BOOT_IN_RECOVERY_MODE ) {
DEBUG ((EFI_D_ERROR, "[BootGuardPei.c] In the BOOT_IN_RECOVERY_MODE\n"));
return Status;
}
if ( BootMode == BOOT_ON_S3_RESUME ) {
DEBUG ((EFI_D_ERROR, "[BootGuardPei.c] In the BOOT_ON_S3_RESUME\n"));
return Status;
}
Status = (*PeiServices)->CreateHob (PeiServices, EFI_HOB_TYPE_GUID_EXTENSION, sizeof (AMI_BOOT_GUARD_HOB), (VOID **) &AmiBootGuardHobPtr);
if ( EFI_ERROR( Status ) ) {
DEBUG ((EFI_D_ERROR, "[BootGuardPei.c] CreateHob is fail for AmiBootGuardHobPtr\n"));
return Status;
}
AmiBootGuardHobPtr->EfiHobGuidType.Name = AmiBootGuardHobGuid;
AmiBootGuardHobPtr->AmiBootGuardVerificationforPEItoDXEFlag = 0;
BootGuardHashDataSize = Sha256GetContextSize ();
Status = ((*PeiServices)->AllocatePool) (PeiServices, BootGuardHashDataSize, &BootGuardSha256Context);
if ( EFI_ERROR( Status ) ) {
DEBUG ((EFI_D_ERROR, "[BootGuardPei.c] AllocatePool is fail for BootGuardSha256Context\n"));
return Status;
}
BootGuardOrgFvMainHash256 = AllocateZeroPool (32);
if (BootGuardOrgFvMainHash256 == NULL) {
DEBUG ((EFI_D_ERROR, "[BootGuardPei.c] AllocateZeroPool is fail for BootGuardOrgFvMainHash256\n"));
return Status;
}
Status = LocateBootGuardFvMainHashKey(PeiServices , &BootGuardOrgFvMainHash256);
if ( EFI_ERROR( Status ) ) {
DEBUG ((EFI_D_ERROR, "[BootGuardPei.c] LocateBootGuardFvMainHashKey is fail\n"));
return Status;
}
ReserveBootGuardFvMainHashKey = (RESERVE_BOOT_GUARD_FV_MAIN_HASH_KEY*)BootGuardOrgFvMainHash256;
for ( i = 0; i < sizeof(ReserveBootGuardFvMainHashKey->BootGuardFvMainHashKey); i++ ) {
DEBUG ((EFI_D_ERROR, "[BootGuardPei.c] BootGuardOrgFvMainHash256[%x]= %x.\n", i, ReserveBootGuardFvMainHashKey->BootGuardFvMainHashKey[i]));
}
DEBUG ((EFI_D_ERROR, "\n[BootGuardPei.c] BootGuardFvMainUsedLength= %x.\n", ReserveBootGuardFvMainHashKey->BootGuardFvMainUsedLength));
Sha256Init (BootGuardSha256Context);
Sha256Update (BootGuardSha256Context, (UINT8 *)(DXE_SEGMENT_BASE), (UINTN)ReserveBootGuardFvMainHashKey->BootGuardFvMainUsedLength);
Sha256Final (BootGuardSha256Context, CurrentBootGuardFvMainHash256Val);
for ( i = 0; i < sizeof (CurrentBootGuardFvMainHash256Val); i++ ) {
DEBUG ((EFI_D_ERROR, "[BootGuardPei.c] CurrentBootGuardFvMainHash256Val[%x]= %x.\n", i, CurrentBootGuardFvMainHash256Val[i]));
}
if ( !CompareMem(BootGuardOrgFvMainHash256, CurrentBootGuardFvMainHash256Val, 32) ) {
AmiBootGuardHobPtr->AmiBootGuardVerificationforPEItoDXEFlag = 1;
} else {
AmiBootGuardHobPtr->AmiBootGuardVerificationforPEItoDXEFlag = 0;
}
DEBUG ((EFI_D_ERROR, "[BootGuardPei.c] AmiBootGuardHobPtr->AmiBootGuardVerificationforPEItoDXEFlag= %x.\n", AmiBootGuardHobPtr->AmiBootGuardVerificationforPEItoDXEFlag));
return Status;
}
EFI_STATUS
BootGuardPeiEntryPoint (
IN EFI_FFS_FILE_HEADER *FfsHeader,
IN EFI_PEI_SERVICES **PeiServices
)
{
EFI_STATUS Status;
PCH_SERIES PchSeries = GetPchSeries();
if ( PchSeries != PchLp ) {
return EFI_SUCCESS;
}
if ( IsBootGuardSupported() == FALSE ) {
return EFI_SUCCESS;
}
if ( (UINT32)AsmReadMsr64 (MSR_BOOT_GUARD_SACM_INFO) == 0 ) {
DEBUG ((EFI_D_ERROR, "[BootGuardPei.c] Boot Guard is disabled by Anchor Cove Profile Configuration in the Intel Fitc\n"));
return EFI_SUCCESS;
}
Status = PeiServicesNotifyPpi (&BootGuardVerificationForPeiToDxeHandoffEndOfPeiNotifyDesc);
if ( EFI_ERROR( Status ) ) {
return Status;
}
return Status;
}
//*************************************************************************
//*************************************************************************
//** **
//** (C)Copyright 1985-2013, American Megatrends, Inc. **
//** **
//** All Rights Reserved. **
//** **
//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 **
//** **
//** Phone: (770)-246-8600 **
//** **
//*************************************************************************
//*************************************************************************
|
