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