diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/SecurityPkg/Library/Tpm12CommandLib/Tpm12Pcr.c')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/SecurityPkg/Library/Tpm12CommandLib/Tpm12Pcr.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/SecurityPkg/Library/Tpm12CommandLib/Tpm12Pcr.c b/src/VBox/Devices/EFI/Firmware/SecurityPkg/Library/Tpm12CommandLib/Tpm12Pcr.c new file mode 100644 index 00000000..3b52a347 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/SecurityPkg/Library/Tpm12CommandLib/Tpm12Pcr.c @@ -0,0 +1,81 @@ +/** @file + Implement TPM1.2 PCR related commands. + +Copyright (c) 2016, Intel Corporation. All rights reserved. <BR> +SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#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; +} |