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/** @file
Implement TPM1.2 PCR related commands.
Copyright (c) 2016, Intel Corporation. All rights reserved. <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 <PiPei.h>
#include <Library/Tpm12CommandLib.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/Tpm12DeviceLib.h>
#pragma pack(1)
typedef struct {
TPM_RQU_COMMAND_HDR Hdr;
TPM_PCRINDEX PcrIndex;
TPM_DIGEST TpmDigest;
} TPM_CMD_EXTEND;
typedef struct {
TPM_RSP_COMMAND_HDR Hdr;
TPM_DIGEST TpmDigest;
} TPM_RSP_EXTEND;
#pragma pack()
/**
Extend a TPM PCR.
@param[in] DigestToExtend The 160 bit value representing the event to be recorded.
@param[in] PcrIndex The PCR to be updated.
@param[out] NewPcrValue New PCR value after extend.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_TIMEOUT The register can't run into the expected status in time.
@retval EFI_BUFFER_TOO_SMALL Response data buffer is too small.
@retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
EFI_STATUS
EFIAPI
Tpm12Extend (
IN TPM_DIGEST *DigestToExtend,
IN TPM_PCRINDEX PcrIndex,
OUT TPM_DIGEST *NewPcrValue
)
{
EFI_STATUS Status;
TPM_CMD_EXTEND Command;
TPM_RSP_EXTEND Response;
UINT32 Length;
//
// send Tpm command TPM_ORD_Extend
//
Command.Hdr.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND);
Command.Hdr.paramSize = SwapBytes32 (sizeof (Command));
Command.Hdr.ordinal = SwapBytes32 (TPM_ORD_Extend);
Command.PcrIndex = SwapBytes32 (PcrIndex);
CopyMem (&Command.TpmDigest, DigestToExtend, sizeof (Command.TpmDigest));
Length = sizeof (Response);
Status = Tpm12SubmitCommand (sizeof (Command), (UINT8 *)&Command, &Length, (UINT8 *)&Response);
if (EFI_ERROR (Status)) {
return Status;
}
if (SwapBytes32(Response.Hdr.returnCode) != TPM_SUCCESS) {
DEBUG ((EFI_D_ERROR, "Tpm12Extend: Response Code error! 0x%08x\r\n", SwapBytes32(Response.Hdr.returnCode)));
return EFI_DEVICE_ERROR;
}
if (NewPcrValue != NULL) {
CopyMem (NewPcrValue, &Response.TpmDigest, sizeof (*NewPcrValue));
}
return Status;
}
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