Add TPM2 commands which might be used in field upgrade.
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: "Yao, Jiewen" <jiewen.yao@intel.com> Reviewed-by: "Dong, Guo" <guo.dong@intel.com> Reviewed-by: "Long, Qin" <qin.long@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16505 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
86
SecurityPkg/Library/Tpm2CommandLib/Tpm2Context.c
Normal file
86
SecurityPkg/Library/Tpm2CommandLib/Tpm2Context.c
Normal file
@@ -0,0 +1,86 @@
|
||||
/** @file
|
||||
Implement TPM2 Context related command.
|
||||
|
||||
Copyright (c) 2014, 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 <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_DH_CONTEXT FlushHandle;
|
||||
} TPM2_FLUSH_CONTEXT_COMMAND;
|
||||
|
||||
typedef struct {
|
||||
TPM2_RESPONSE_HEADER Header;
|
||||
} TPM2_FLUSH_CONTEXT_RESPONSE;
|
||||
|
||||
#pragma pack()
|
||||
|
||||
/**
|
||||
This command causes all context associated with a loaded object or session to be removed from TPM memory.
|
||||
|
||||
@param[in] FlushHandle The handle of the item to flush.
|
||||
|
||||
@retval EFI_SUCCESS Operation completed successfully.
|
||||
@retval EFI_DEVICE_ERROR The command was unsuccessful.
|
||||
**/
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
Tpm2FlushContext (
|
||||
IN TPMI_DH_CONTEXT FlushHandle
|
||||
)
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
TPM2_FLUSH_CONTEXT_COMMAND SendBuffer;
|
||||
TPM2_FLUSH_CONTEXT_RESPONSE RecvBuffer;
|
||||
UINT32 SendBufferSize;
|
||||
UINT32 RecvBufferSize;
|
||||
|
||||
//
|
||||
// Construct command
|
||||
//
|
||||
SendBuffer.Header.tag = SwapBytes16(TPM_ST_NO_SESSIONS);
|
||||
SendBuffer.Header.commandCode = SwapBytes32(TPM_CC_FlushContext);
|
||||
|
||||
SendBuffer.FlushHandle = SwapBytes32 (FlushHandle);
|
||||
|
||||
SendBufferSize = (UINT32) sizeof (SendBuffer);
|
||||
SendBuffer.Header.paramSize = SwapBytes32 (SendBufferSize);
|
||||
|
||||
//
|
||||
// send Tpm command
|
||||
//
|
||||
RecvBufferSize = sizeof (RecvBuffer);
|
||||
Status = Tpm2SubmitCommand (SendBufferSize, (UINT8 *)&SendBuffer, &RecvBufferSize, (UINT8 *)&RecvBuffer);
|
||||
if (EFI_ERROR (Status)) {
|
||||
return Status;
|
||||
}
|
||||
|
||||
if (RecvBufferSize < sizeof (TPM2_RESPONSE_HEADER)) {
|
||||
DEBUG ((EFI_D_ERROR, "Tpm2FlushContext - RecvBufferSize Error - %x\n", RecvBufferSize));
|
||||
return EFI_DEVICE_ERROR;
|
||||
}
|
||||
if (SwapBytes32(RecvBuffer.Header.responseCode) != TPM_RC_SUCCESS) {
|
||||
DEBUG ((EFI_D_ERROR, "Tpm2FlushContext - responseCode - %x\n", SwapBytes32(RecvBuffer.Header.responseCode)));
|
||||
return EFI_DEVICE_ERROR;
|
||||
}
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
Reference in New Issue
Block a user