/** @file | |
Implement TPM2 Miscellaneous related command. | |
Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved. <BR> | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
#include <IndustryStandard/UefiTcgPlatform.h> | |
#include <Library/Tpm2CommandLib.h> | |
#include <Library/Tpm2DeviceLib.h> | |
#include <Library/BaseMemoryLib.h> | |
#include <Library/BaseLib.h> | |
#include <Library/DebugLib.h> | |
#pragma pack(1) | |
typedef struct { | |
TPM2_COMMAND_HEADER Header; | |
TPMI_RH_HIERARCHY_AUTH AuthHandle; | |
UINT32 AuthSessionSize; | |
TPMS_AUTH_COMMAND AuthSession; | |
UINT32 AlgorithmSet; | |
} TPM2_SET_ALGORITHM_SET_COMMAND; | |
typedef struct { | |
TPM2_RESPONSE_HEADER Header; | |
UINT32 AuthSessionSize; | |
TPMS_AUTH_RESPONSE AuthSession; | |
} TPM2_SET_ALGORITHM_SET_RESPONSE; | |
#pragma pack() | |
/** | |
This command allows the platform to change the set of algorithms that are used by the TPM. | |
The algorithmSet setting is a vendor-dependent value. | |
@param[in] AuthHandle TPM_RH_PLATFORM | |
@param[in] AuthSession Auth Session context | |
@param[in] AlgorithmSet A TPM vendor-dependent value indicating the | |
algorithm set selection | |
@retval EFI_SUCCESS Operation completed successfully. | |
@retval EFI_DEVICE_ERROR Unexpected device behavior. | |
**/ | |
EFI_STATUS | |
EFIAPI | |
Tpm2SetAlgorithmSet ( | |
IN TPMI_RH_PLATFORM AuthHandle, | |
IN TPMS_AUTH_COMMAND *AuthSession, | |
IN UINT32 AlgorithmSet | |
) | |
{ | |
EFI_STATUS Status; | |
TPM2_SET_ALGORITHM_SET_COMMAND SendBuffer; | |
TPM2_SET_ALGORITHM_SET_RESPONSE RecvBuffer; | |
UINT32 SendBufferSize; | |
UINT32 RecvBufferSize; | |
UINT8 *Buffer; | |
UINT32 SessionInfoSize; | |
// | |
// Construct command | |
// | |
SendBuffer.Header.tag = SwapBytes16 (TPM_ST_SESSIONS); | |
SendBuffer.Header.commandCode = SwapBytes32 (TPM_CC_SetAlgorithmSet); | |
SendBuffer.AuthHandle = SwapBytes32 (AuthHandle); | |
// | |
// Add in Auth session | |
// | |
Buffer = (UINT8 *)&SendBuffer.AuthSession; | |
// sessionInfoSize | |
SessionInfoSize = CopyAuthSessionCommand (AuthSession, Buffer); | |
Buffer += SessionInfoSize; | |
SendBuffer.AuthSessionSize = SwapBytes32 (SessionInfoSize); | |
// | |
// Real data | |
// | |
WriteUnaligned32 ((UINT32 *)Buffer, SwapBytes32 (AlgorithmSet)); | |
Buffer += sizeof (UINT32); | |
SendBufferSize = (UINT32)((UINTN)Buffer - (UINTN)&SendBuffer); | |
SendBuffer.Header.paramSize = SwapBytes32 (SendBufferSize); | |
// | |
// send Tpm command | |
// | |
RecvBufferSize = sizeof (RecvBuffer); | |
Status = Tpm2SubmitCommand (SendBufferSize, (UINT8 *)&SendBuffer, &RecvBufferSize, (UINT8 *)&RecvBuffer); | |
if (EFI_ERROR (Status)) { | |
goto Done; | |
} | |
if (RecvBufferSize < sizeof (TPM2_RESPONSE_HEADER)) { | |
DEBUG ((DEBUG_ERROR, "Tpm2SetAlgorithmSet - RecvBufferSize Error - %x\n", RecvBufferSize)); | |
Status = EFI_DEVICE_ERROR; | |
goto Done; | |
} | |
if (SwapBytes32 (RecvBuffer.Header.responseCode) != TPM_RC_SUCCESS) { | |
DEBUG ((DEBUG_ERROR, "Tpm2SetAlgorithmSet - responseCode - %x\n", SwapBytes32 (RecvBuffer.Header.responseCode))); | |
Status = EFI_DEVICE_ERROR; | |
goto Done; | |
} | |
Done: | |
// | |
// Clear AuthSession Content | |
// | |
ZeroMem (&SendBuffer, sizeof (SendBuffer)); | |
ZeroMem (&RecvBuffer, sizeof (RecvBuffer)); | |
return Status; | |
} |