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|
/** @file
Implement TPM2 Hierarchy related command.
Copyright (c) 2013 - 2018, 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;
TPM2B_DIGEST AuthPolicy;
TPMI_ALG_HASH HashAlg;
} TPM2_SET_PRIMARY_POLICY_COMMAND;
typedef struct {
TPM2_RESPONSE_HEADER Header;
UINT32 AuthSessionSize;
TPMS_AUTH_RESPONSE AuthSession;
} TPM2_SET_PRIMARY_POLICY_RESPONSE;
typedef struct {
TPM2_COMMAND_HEADER Header;
TPMI_RH_CLEAR AuthHandle;
UINT32 AuthorizationSize;
TPMS_AUTH_COMMAND AuthSession;
} TPM2_CLEAR_COMMAND;
typedef struct {
TPM2_RESPONSE_HEADER Header;
UINT32 ParameterSize;
TPMS_AUTH_RESPONSE AuthSession;
} TPM2_CLEAR_RESPONSE;
typedef struct {
TPM2_COMMAND_HEADER Header;
TPMI_RH_CLEAR AuthHandle;
UINT32 AuthorizationSize;
TPMS_AUTH_COMMAND AuthSession;
TPMI_YES_NO Disable;
} TPM2_CLEAR_CONTROL_COMMAND;
typedef struct {
TPM2_RESPONSE_HEADER Header;
UINT32 ParameterSize;
TPMS_AUTH_RESPONSE AuthSession;
} TPM2_CLEAR_CONTROL_RESPONSE;
typedef struct {
TPM2_COMMAND_HEADER Header;
TPMI_RH_HIERARCHY_AUTH AuthHandle;
UINT32 AuthorizationSize;
TPMS_AUTH_COMMAND AuthSession;
TPM2B_AUTH NewAuth;
} TPM2_HIERARCHY_CHANGE_AUTH_COMMAND;
typedef struct {
TPM2_RESPONSE_HEADER Header;
UINT32 ParameterSize;
TPMS_AUTH_RESPONSE AuthSession;
} TPM2_HIERARCHY_CHANGE_AUTH_RESPONSE;
typedef struct {
TPM2_COMMAND_HEADER Header;
TPMI_RH_PLATFORM AuthHandle;
UINT32 AuthorizationSize;
TPMS_AUTH_COMMAND AuthSession;
} TPM2_CHANGE_EPS_COMMAND;
typedef struct {
TPM2_RESPONSE_HEADER Header;
UINT32 ParameterSize;
TPMS_AUTH_RESPONSE AuthSession;
} TPM2_CHANGE_EPS_RESPONSE;
typedef struct {
TPM2_COMMAND_HEADER Header;
TPMI_RH_PLATFORM AuthHandle;
UINT32 AuthorizationSize;
TPMS_AUTH_COMMAND AuthSession;
} TPM2_CHANGE_PPS_COMMAND;
typedef struct {
TPM2_RESPONSE_HEADER Header;
UINT32 ParameterSize;
TPMS_AUTH_RESPONSE AuthSession;
} TPM2_CHANGE_PPS_RESPONSE;
typedef struct {
TPM2_COMMAND_HEADER Header;
TPMI_RH_HIERARCHY AuthHandle;
UINT32 AuthorizationSize;
TPMS_AUTH_COMMAND AuthSession;
TPMI_RH_HIERARCHY Hierarchy;
TPMI_YES_NO State;
} TPM2_HIERARCHY_CONTROL_COMMAND;
typedef struct {
TPM2_RESPONSE_HEADER Header;
UINT32 ParameterSize;
TPMS_AUTH_RESPONSE AuthSession;
} TPM2_HIERARCHY_CONTROL_RESPONSE;
#pragma pack()
/**
This command allows setting of the authorization policy for the platform hierarchy (platformPolicy), the
storage hierarchy (ownerPolicy), and and the endorsement hierarchy (endorsementPolicy).
@param[in] AuthHandle TPM_RH_ENDORSEMENT, TPM_RH_OWNER or TPM_RH_PLATFORM+{PP} parameters to be validated
@param[in] AuthSession Auth Session context
@param[in] AuthPolicy An authorization policy hash
@param[in] HashAlg The hash algorithm to use for the policy
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
EFI_STATUS
EFIAPI
Tpm2SetPrimaryPolicy (
IN TPMI_RH_HIERARCHY_AUTH AuthHandle,
IN TPMS_AUTH_COMMAND *AuthSession,
IN TPM2B_DIGEST *AuthPolicy,
IN TPMI_ALG_HASH HashAlg
)
{
EFI_STATUS Status;
TPM2_SET_PRIMARY_POLICY_COMMAND SendBuffer;
TPM2_SET_PRIMARY_POLICY_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_SetPrimaryPolicy);
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
//
WriteUnaligned16 ((UINT16 *)Buffer, SwapBytes16(AuthPolicy->size));
Buffer += sizeof(UINT16);
CopyMem (Buffer, AuthPolicy->buffer, AuthPolicy->size);
Buffer += AuthPolicy->size;
WriteUnaligned16 ((UINT16 *)Buffer, SwapBytes16(HashAlg));
Buffer += sizeof(UINT16);
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 ((EFI_D_ERROR, "Tpm2SetPrimaryPolicy - RecvBufferSize Error - %x\n", RecvBufferSize));
Status = EFI_DEVICE_ERROR;
goto Done;
}
if (SwapBytes32(RecvBuffer.Header.responseCode) != TPM_RC_SUCCESS) {
DEBUG ((EFI_D_ERROR, "Tpm2SetPrimaryPolicy - 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;
}
/**
This command removes all TPM context associated with a specific Owner.
@param[in] AuthHandle TPM_RH_LOCKOUT or TPM_RH_PLATFORM+{PP}
@param[in] AuthSession Auth Session context
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
EFI_STATUS
EFIAPI
Tpm2Clear (
IN TPMI_RH_CLEAR AuthHandle,
IN TPMS_AUTH_COMMAND *AuthSession OPTIONAL
)
{
EFI_STATUS Status;
TPM2_CLEAR_COMMAND Cmd;
TPM2_CLEAR_RESPONSE Res;
UINT32 ResultBufSize;
UINT32 CmdSize;
UINT32 RespSize;
UINT8 *Buffer;
UINT32 SessionInfoSize;
Cmd.Header.tag = SwapBytes16(TPM_ST_SESSIONS);
Cmd.Header.commandCode = SwapBytes32(TPM_CC_Clear);
Cmd.AuthHandle = SwapBytes32(AuthHandle);
//
// Add in Auth session
//
Buffer = (UINT8 *)&Cmd.AuthSession;
// sessionInfoSize
SessionInfoSize = CopyAuthSessionCommand (AuthSession, Buffer);
Buffer += SessionInfoSize;
Cmd.AuthorizationSize = SwapBytes32(SessionInfoSize);
CmdSize = (UINT32)(Buffer - (UINT8 *)&Cmd);
Cmd.Header.paramSize = SwapBytes32(CmdSize);
ResultBufSize = sizeof(Res);
Status = Tpm2SubmitCommand (CmdSize, (UINT8 *)&Cmd, &ResultBufSize, (UINT8 *)&Res);
if (EFI_ERROR(Status)) {
goto Done;
}
if (ResultBufSize > sizeof(Res)) {
DEBUG ((EFI_D_ERROR, "Clear: Failed ExecuteCommand: Buffer Too Small\r\n"));
Status = EFI_BUFFER_TOO_SMALL;
goto Done;
}
//
// Validate response headers
//
RespSize = SwapBytes32(Res.Header.paramSize);
if (RespSize > sizeof(Res)) {
DEBUG ((EFI_D_ERROR, "Clear: Response size too large! %d\r\n", RespSize));
Status = EFI_BUFFER_TOO_SMALL;
goto Done;
}
//
// Fail if command failed
//
if (SwapBytes32(Res.Header.responseCode) != TPM_RC_SUCCESS) {
DEBUG ((EFI_D_ERROR, "Clear: Response Code error! 0x%08x\r\n", SwapBytes32(Res.Header.responseCode)));
Status = EFI_DEVICE_ERROR;
goto Done;
}
//
// Unmarshal the response
//
// None
Done:
//
// Clear AuthSession Content
//
ZeroMem (&Cmd, sizeof(Cmd));
ZeroMem (&Res, sizeof(Res));
return Status;
}
/**
Disables and enables the execution of TPM2_Clear().
@param[in] AuthHandle TPM_RH_LOCKOUT or TPM_RH_PLATFORM+{PP}
@param[in] AuthSession Auth Session context
@param[in] Disable YES if the disableOwnerClear flag is to be SET,
NO if the flag is to be CLEAR.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
EFI_STATUS
EFIAPI
Tpm2ClearControl (
IN TPMI_RH_CLEAR AuthHandle,
IN TPMS_AUTH_COMMAND *AuthSession, OPTIONAL
IN TPMI_YES_NO Disable
)
{
EFI_STATUS Status;
TPM2_CLEAR_CONTROL_COMMAND Cmd;
TPM2_CLEAR_CONTROL_RESPONSE Res;
UINT32 ResultBufSize;
UINT32 CmdSize;
UINT32 RespSize;
UINT8 *Buffer;
UINT32 SessionInfoSize;
Cmd.Header.tag = SwapBytes16(TPM_ST_SESSIONS);
Cmd.Header.commandCode = SwapBytes32(TPM_CC_ClearControl);
Cmd.AuthHandle = SwapBytes32(AuthHandle);
//
// Add in Auth session
//
Buffer = (UINT8 *)&Cmd.AuthSession;
// sessionInfoSize
SessionInfoSize = CopyAuthSessionCommand (AuthSession, Buffer);
Buffer += SessionInfoSize;
Cmd.AuthorizationSize = SwapBytes32(SessionInfoSize);
// disable
*(UINT8 *)Buffer = Disable;
Buffer++;
CmdSize = (UINT32)(Buffer - (UINT8 *)&Cmd);
Cmd.Header.paramSize = SwapBytes32(CmdSize);
ResultBufSize = sizeof(Res);
Status = Tpm2SubmitCommand (CmdSize, (UINT8 *)&Cmd, &ResultBufSize, (UINT8 *)&Res);
if (EFI_ERROR(Status)) {
goto Done;
}
if (ResultBufSize > sizeof(Res)) {
DEBUG ((EFI_D_ERROR, "ClearControl: Failed ExecuteCommand: Buffer Too Small\r\n"));
Status = EFI_BUFFER_TOO_SMALL;
goto Done;
}
//
// Validate response headers
//
RespSize = SwapBytes32(Res.Header.paramSize);
if (RespSize > sizeof(Res)) {
DEBUG ((EFI_D_ERROR, "ClearControl: Response size too large! %d\r\n", RespSize));
Status = EFI_BUFFER_TOO_SMALL;
goto Done;
}
//
// Fail if command failed
//
if (SwapBytes32(Res.Header.responseCode) != TPM_RC_SUCCESS) {
DEBUG ((EFI_D_ERROR, "ClearControl: Response Code error! 0x%08x\r\n", SwapBytes32(Res.Header.responseCode)));
Status = EFI_DEVICE_ERROR;
goto Done;
}
//
// Unmarshal the response
//
// None
Done:
//
// Clear AuthSession Content
//
ZeroMem (&Cmd, sizeof(Cmd));
ZeroMem (&Res, sizeof(Res));
return Status;
}
/**
This command allows the authorization secret for a hierarchy or lockout to be changed using the current
authorization value as the command authorization.
@param[in] AuthHandle TPM_RH_LOCKOUT, TPM_RH_ENDORSEMENT, TPM_RH_OWNER or TPM_RH_PLATFORM+{PP}
@param[in] AuthSession Auth Session context
@param[in] NewAuth New authorization secret
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
EFI_STATUS
EFIAPI
Tpm2HierarchyChangeAuth (
IN TPMI_RH_HIERARCHY_AUTH AuthHandle,
IN TPMS_AUTH_COMMAND *AuthSession,
IN TPM2B_AUTH *NewAuth
)
{
EFI_STATUS Status;
TPM2_HIERARCHY_CHANGE_AUTH_COMMAND Cmd;
TPM2_HIERARCHY_CHANGE_AUTH_RESPONSE Res;
UINT32 CmdSize;
UINT32 RespSize;
UINT8 *Buffer;
UINT32 SessionInfoSize;
UINT8 *ResultBuf;
UINT32 ResultBufSize;
//
// Construct command
//
Cmd.Header.tag = SwapBytes16(TPM_ST_SESSIONS);
Cmd.Header.paramSize = SwapBytes32(sizeof(Cmd));
Cmd.Header.commandCode = SwapBytes32(TPM_CC_HierarchyChangeAuth);
Cmd.AuthHandle = SwapBytes32(AuthHandle);
//
// Add in Auth session
//
Buffer = (UINT8 *)&Cmd.AuthSession;
// sessionInfoSize
SessionInfoSize = CopyAuthSessionCommand (AuthSession, Buffer);
Buffer += SessionInfoSize;
Cmd.AuthorizationSize = SwapBytes32(SessionInfoSize);
// New Authorization size
WriteUnaligned16 ((UINT16 *)Buffer, SwapBytes16(NewAuth->size));
Buffer += sizeof(UINT16);
// New Authorization
CopyMem(Buffer, NewAuth->buffer, NewAuth->size);
Buffer += NewAuth->size;
CmdSize = (UINT32)(Buffer - (UINT8 *)&Cmd);
Cmd.Header.paramSize = SwapBytes32(CmdSize);
ResultBuf = (UINT8 *) &Res;
ResultBufSize = sizeof(Res);
//
// Call the TPM
//
Status = Tpm2SubmitCommand (
CmdSize,
(UINT8 *)&Cmd,
&ResultBufSize,
ResultBuf
);
if (EFI_ERROR(Status)) {
goto Done;
}
if (ResultBufSize > sizeof(Res)) {
DEBUG ((EFI_D_ERROR, "HierarchyChangeAuth: Failed ExecuteCommand: Buffer Too Small\r\n"));
Status = EFI_BUFFER_TOO_SMALL;
goto Done;
}
//
// Validate response headers
//
RespSize = SwapBytes32(Res.Header.paramSize);
if (RespSize > sizeof(Res)) {
DEBUG ((EFI_D_ERROR, "HierarchyChangeAuth: Response size too large! %d\r\n", RespSize));
Status = EFI_BUFFER_TOO_SMALL;
goto Done;
}
//
// Fail if command failed
//
if (SwapBytes32(Res.Header.responseCode) != TPM_RC_SUCCESS) {
DEBUG((EFI_D_ERROR,"HierarchyChangeAuth: Response Code error! 0x%08x\r\n", SwapBytes32(Res.Header.responseCode)));
Status = EFI_DEVICE_ERROR;
goto Done;
}
Done:
//
// Clear AuthSession Content
//
ZeroMem (&Cmd, sizeof(Cmd));
ZeroMem (&Res, sizeof(Res));
return Status;
}
/**
This replaces the current EPS with a value from the RNG and sets the Endorsement hierarchy controls to
their default initialization values.
@param[in] AuthHandle TPM_RH_PLATFORM+{PP}
@param[in] AuthSession Auth Session context
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
EFI_STATUS
EFIAPI
Tpm2ChangeEPS (
IN TPMI_RH_PLATFORM AuthHandle,
IN TPMS_AUTH_COMMAND *AuthSession
)
{
EFI_STATUS Status;
TPM2_CHANGE_EPS_COMMAND Cmd;
TPM2_CHANGE_EPS_RESPONSE Res;
UINT32 CmdSize;
UINT32 RespSize;
UINT8 *Buffer;
UINT32 SessionInfoSize;
UINT8 *ResultBuf;
UINT32 ResultBufSize;
//
// Construct command
//
Cmd.Header.tag = SwapBytes16(TPM_ST_SESSIONS);
Cmd.Header.paramSize = SwapBytes32(sizeof(Cmd));
Cmd.Header.commandCode = SwapBytes32(TPM_CC_ChangeEPS);
Cmd.AuthHandle = SwapBytes32(AuthHandle);
//
// Add in Auth session
//
Buffer = (UINT8 *)&Cmd.AuthSession;
// sessionInfoSize
SessionInfoSize = CopyAuthSessionCommand (AuthSession, Buffer);
Buffer += SessionInfoSize;
Cmd.AuthorizationSize = SwapBytes32(SessionInfoSize);
CmdSize = (UINT32)(Buffer - (UINT8 *)&Cmd);
Cmd.Header.paramSize = SwapBytes32(CmdSize);
ResultBuf = (UINT8 *) &Res;
ResultBufSize = sizeof(Res);
//
// Call the TPM
//
Status = Tpm2SubmitCommand (
CmdSize,
(UINT8 *)&Cmd,
&ResultBufSize,
ResultBuf
);
if (EFI_ERROR(Status)) {
goto Done;
}
if (ResultBufSize > sizeof(Res)) {
DEBUG ((EFI_D_ERROR, "ChangeEPS: Failed ExecuteCommand: Buffer Too Small\r\n"));
Status = EFI_BUFFER_TOO_SMALL;
goto Done;
}
//
// Validate response headers
//
RespSize = SwapBytes32(Res.Header.paramSize);
if (RespSize > sizeof(Res)) {
DEBUG ((EFI_D_ERROR, "ChangeEPS: Response size too large! %d\r\n", RespSize));
Status = EFI_BUFFER_TOO_SMALL;
goto Done;
}
//
// Fail if command failed
//
if (SwapBytes32(Res.Header.responseCode) != TPM_RC_SUCCESS) {
DEBUG((EFI_D_ERROR,"ChangeEPS: Response Code error! 0x%08x\r\n", SwapBytes32(Res.Header.responseCode)));
Status = EFI_DEVICE_ERROR;
goto Done;
}
Done:
//
// Clear AuthSession Content
//
ZeroMem (&Cmd, sizeof(Cmd));
ZeroMem (&Res, sizeof(Res));
return Status;
}
/**
This replaces the current PPS with a value from the RNG and sets platformPolicy to the default
initialization value (the Empty Buffer).
@param[in] AuthHandle TPM_RH_PLATFORM+{PP}
@param[in] AuthSession Auth Session context
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
EFI_STATUS
EFIAPI
Tpm2ChangePPS (
IN TPMI_RH_PLATFORM AuthHandle,
IN TPMS_AUTH_COMMAND *AuthSession
)
{
EFI_STATUS Status;
TPM2_CHANGE_PPS_COMMAND Cmd;
TPM2_CHANGE_PPS_RESPONSE Res;
UINT32 CmdSize;
UINT32 RespSize;
UINT8 *Buffer;
UINT32 SessionInfoSize;
UINT8 *ResultBuf;
UINT32 ResultBufSize;
//
// Construct command
//
Cmd.Header.tag = SwapBytes16(TPM_ST_SESSIONS);
Cmd.Header.paramSize = SwapBytes32(sizeof(Cmd));
Cmd.Header.commandCode = SwapBytes32(TPM_CC_ChangePPS);
Cmd.AuthHandle = SwapBytes32(AuthHandle);
//
// Add in Auth session
//
Buffer = (UINT8 *)&Cmd.AuthSession;
// sessionInfoSize
SessionInfoSize = CopyAuthSessionCommand (AuthSession, Buffer);
Buffer += SessionInfoSize;
Cmd.AuthorizationSize = SwapBytes32(SessionInfoSize);
CmdSize = (UINT32)(Buffer - (UINT8 *)&Cmd);
Cmd.Header.paramSize = SwapBytes32(CmdSize);
ResultBuf = (UINT8 *) &Res;
ResultBufSize = sizeof(Res);
//
// Call the TPM
//
Status = Tpm2SubmitCommand (
CmdSize,
(UINT8 *)&Cmd,
&ResultBufSize,
ResultBuf
);
if (EFI_ERROR(Status)) {
goto Done;
}
if (ResultBufSize > sizeof(Res)) {
DEBUG ((EFI_D_ERROR, "ChangePPS: Failed ExecuteCommand: Buffer Too Small\r\n"));
Status = EFI_BUFFER_TOO_SMALL;
goto Done;
}
//
// Validate response headers
//
RespSize = SwapBytes32(Res.Header.paramSize);
if (RespSize > sizeof(Res)) {
DEBUG ((EFI_D_ERROR, "ChangePPS: Response size too large! %d\r\n", RespSize));
Status = EFI_BUFFER_TOO_SMALL;
goto Done;
}
//
// Fail if command failed
//
if (SwapBytes32(Res.Header.responseCode) != TPM_RC_SUCCESS) {
DEBUG((EFI_D_ERROR,"ChangePPS: Response Code error! 0x%08x\r\n", SwapBytes32(Res.Header.responseCode)));
Status = EFI_DEVICE_ERROR;
goto Done;
}
Done:
//
// Clear AuthSession Content
//
ZeroMem (&Cmd, sizeof(Cmd));
ZeroMem (&Res, sizeof(Res));
return Status;
}
/**
This command enables and disables use of a hierarchy.
@param[in] AuthHandle TPM_RH_ENDORSEMENT, TPM_RH_OWNER or TPM_RH_PLATFORM+{PP}
@param[in] AuthSession Auth Session context
@param[in] Hierarchy Hierarchy of the enable being modified
@param[in] State YES if the enable should be SET,
NO if the enable should be CLEAR
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
EFI_STATUS
EFIAPI
Tpm2HierarchyControl (
IN TPMI_RH_HIERARCHY AuthHandle,
IN TPMS_AUTH_COMMAND *AuthSession,
IN TPMI_RH_HIERARCHY Hierarchy,
IN TPMI_YES_NO State
)
{
EFI_STATUS Status;
TPM2_HIERARCHY_CONTROL_COMMAND Cmd;
TPM2_HIERARCHY_CONTROL_RESPONSE Res;
UINT32 CmdSize;
UINT32 RespSize;
UINT8 *Buffer;
UINT32 SessionInfoSize;
UINT8 *ResultBuf;
UINT32 ResultBufSize;
//
// Construct command
//
Cmd.Header.tag = SwapBytes16(TPM_ST_SESSIONS);
Cmd.Header.paramSize = SwapBytes32(sizeof(Cmd));
Cmd.Header.commandCode = SwapBytes32(TPM_CC_HierarchyControl);
Cmd.AuthHandle = SwapBytes32(AuthHandle);
//
// Add in Auth session
//
Buffer = (UINT8 *)&Cmd.AuthSession;
// sessionInfoSize
SessionInfoSize = CopyAuthSessionCommand (AuthSession, Buffer);
Buffer += SessionInfoSize;
Cmd.AuthorizationSize = SwapBytes32(SessionInfoSize);
WriteUnaligned32 ((UINT32 *)Buffer, SwapBytes32(Hierarchy));
Buffer += sizeof(UINT32);
*(UINT8 *)Buffer = State;
Buffer++;
CmdSize = (UINT32)(Buffer - (UINT8 *)&Cmd);
Cmd.Header.paramSize = SwapBytes32(CmdSize);
ResultBuf = (UINT8 *) &Res;
ResultBufSize = sizeof(Res);
//
// Call the TPM
//
Status = Tpm2SubmitCommand (
CmdSize,
(UINT8 *)&Cmd,
&ResultBufSize,
ResultBuf
);
if (EFI_ERROR(Status)) {
goto Done;
}
if (ResultBufSize > sizeof(Res)) {
DEBUG ((EFI_D_ERROR, "HierarchyControl: Failed ExecuteCommand: Buffer Too Small\r\n"));
Status = EFI_BUFFER_TOO_SMALL;
goto Done;
}
//
// Validate response headers
//
RespSize = SwapBytes32(Res.Header.paramSize);
if (RespSize > sizeof(Res)) {
DEBUG ((EFI_D_ERROR, "HierarchyControl: Response size too large! %d\r\n", RespSize));
Status = EFI_BUFFER_TOO_SMALL;
goto Done;
}
//
// Fail if command failed
//
if (SwapBytes32(Res.Header.responseCode) != TPM_RC_SUCCESS) {
DEBUG((EFI_D_ERROR,"HierarchyControl: Response Code error! 0x%08x\r\n", SwapBytes32(Res.Header.responseCode)));
Status = EFI_DEVICE_ERROR;
goto Done;
}
Done:
//
// Clear AuthSession Content
//
ZeroMem (&Cmd, sizeof(Cmd));
ZeroMem (&Res, sizeof(Res));
return Status;
}
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