mirror of
https://git.proxmox.com/git/mirror_edk2
synced 2025-11-04 14:48:56 +00:00
558f58e3e0
Cc: Feng Tian <feng.tian@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jeff Fan <jeff.fan@intel.com> Reviewed-by: Feng Tian <feng.tian@intel.com>
426 lines
13 KiB
C
426 lines
13 KiB
C
/** @file
|
|
LockBox SMM driver.
|
|
|
|
Caution: This module requires additional review when modified.
|
|
This driver will have external input - communicate buffer in SMM mode.
|
|
This external input must be validated carefully to avoid security issue like
|
|
buffer overflow, integer overflow.
|
|
|
|
SmmLockBoxHandler(), SmmLockBoxRestore(), SmmLockBoxUpdate(), SmmLockBoxSave()
|
|
will receive untrusted input and do basic validation.
|
|
|
|
Copyright (c) 2010 - 2017, 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 <PiSmm.h>
|
|
#include <Library/UefiDriverEntryPoint.h>
|
|
#include <Library/UefiBootServicesTableLib.h>
|
|
#include <Library/UefiRuntimeServicesTableLib.h>
|
|
#include <Library/SmmServicesTableLib.h>
|
|
#include <Library/BaseLib.h>
|
|
#include <Library/BaseMemoryLib.h>
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/SmmMemLib.h>
|
|
#include <Library/LockBoxLib.h>
|
|
|
|
#include <Protocol/SmmReadyToLock.h>
|
|
#include <Protocol/SmmCommunication.h>
|
|
#include <Protocol/LockBox.h>
|
|
#include <Guid/SmmLockBox.h>
|
|
|
|
BOOLEAN mLocked = FALSE;
|
|
|
|
/**
|
|
Dispatch function for SMM lock box save.
|
|
|
|
Caution: This function may receive untrusted input.
|
|
Restore buffer and length are external input, so this function will validate
|
|
it is in SMRAM.
|
|
|
|
@param LockBoxParameterSave parameter of lock box save
|
|
**/
|
|
VOID
|
|
SmmLockBoxSave (
|
|
IN EFI_SMM_LOCK_BOX_PARAMETER_SAVE *LockBoxParameterSave
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
EFI_SMM_LOCK_BOX_PARAMETER_SAVE TempLockBoxParameterSave;
|
|
|
|
//
|
|
// Sanity check
|
|
//
|
|
if (mLocked) {
|
|
DEBUG ((EFI_D_ERROR, "SmmLockBox Locked!\n"));
|
|
LockBoxParameterSave->Header.ReturnStatus = (UINT64)EFI_ACCESS_DENIED;
|
|
return ;
|
|
}
|
|
|
|
CopyMem (&TempLockBoxParameterSave, LockBoxParameterSave, sizeof (EFI_SMM_LOCK_BOX_PARAMETER_SAVE));
|
|
|
|
//
|
|
// Sanity check
|
|
//
|
|
if (!SmmIsBufferOutsideSmmValid ((UINTN)TempLockBoxParameterSave.Buffer, (UINTN)TempLockBoxParameterSave.Length)) {
|
|
DEBUG ((EFI_D_ERROR, "SmmLockBox Save address in SMRAM or buffer overflow!\n"));
|
|
LockBoxParameterSave->Header.ReturnStatus = (UINT64)EFI_ACCESS_DENIED;
|
|
return ;
|
|
}
|
|
|
|
//
|
|
// Save data
|
|
//
|
|
Status = SaveLockBox (
|
|
&TempLockBoxParameterSave.Guid,
|
|
(VOID *)(UINTN)TempLockBoxParameterSave.Buffer,
|
|
(UINTN)TempLockBoxParameterSave.Length
|
|
);
|
|
LockBoxParameterSave->Header.ReturnStatus = (UINT64)Status;
|
|
return ;
|
|
}
|
|
|
|
/**
|
|
Dispatch function for SMM lock box set attributes.
|
|
|
|
@param LockBoxParameterSetAttributes parameter of lock box set attributes
|
|
**/
|
|
VOID
|
|
SmmLockBoxSetAttributes (
|
|
IN EFI_SMM_LOCK_BOX_PARAMETER_SET_ATTRIBUTES *LockBoxParameterSetAttributes
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
EFI_SMM_LOCK_BOX_PARAMETER_SET_ATTRIBUTES TempLockBoxParameterSetAttributes;
|
|
|
|
//
|
|
// Sanity check
|
|
//
|
|
if (mLocked) {
|
|
DEBUG ((EFI_D_ERROR, "SmmLockBox Locked!\n"));
|
|
LockBoxParameterSetAttributes->Header.ReturnStatus = (UINT64)EFI_ACCESS_DENIED;
|
|
return ;
|
|
}
|
|
|
|
CopyMem (&TempLockBoxParameterSetAttributes, LockBoxParameterSetAttributes, sizeof (EFI_SMM_LOCK_BOX_PARAMETER_SET_ATTRIBUTES));
|
|
|
|
//
|
|
// Update data
|
|
//
|
|
Status = SetLockBoxAttributes (
|
|
&TempLockBoxParameterSetAttributes.Guid,
|
|
TempLockBoxParameterSetAttributes.Attributes
|
|
);
|
|
LockBoxParameterSetAttributes->Header.ReturnStatus = (UINT64)Status;
|
|
return ;
|
|
}
|
|
|
|
/**
|
|
Dispatch function for SMM lock box update.
|
|
|
|
Caution: This function may receive untrusted input.
|
|
Restore buffer and length are external input, so this function will validate
|
|
it is in SMRAM.
|
|
|
|
@param LockBoxParameterUpdate parameter of lock box update
|
|
**/
|
|
VOID
|
|
SmmLockBoxUpdate (
|
|
IN EFI_SMM_LOCK_BOX_PARAMETER_UPDATE *LockBoxParameterUpdate
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
EFI_SMM_LOCK_BOX_PARAMETER_UPDATE TempLockBoxParameterUpdate;
|
|
|
|
//
|
|
// Sanity check
|
|
//
|
|
if (mLocked) {
|
|
DEBUG ((EFI_D_ERROR, "SmmLockBox Locked!\n"));
|
|
LockBoxParameterUpdate->Header.ReturnStatus = (UINT64)EFI_ACCESS_DENIED;
|
|
return ;
|
|
}
|
|
|
|
CopyMem (&TempLockBoxParameterUpdate, LockBoxParameterUpdate, sizeof (EFI_SMM_LOCK_BOX_PARAMETER_UPDATE));
|
|
|
|
//
|
|
// Sanity check
|
|
//
|
|
if (!SmmIsBufferOutsideSmmValid ((UINTN)TempLockBoxParameterUpdate.Buffer, (UINTN)TempLockBoxParameterUpdate.Length)) {
|
|
DEBUG ((EFI_D_ERROR, "SmmLockBox Update address in SMRAM or buffer overflow!\n"));
|
|
LockBoxParameterUpdate->Header.ReturnStatus = (UINT64)EFI_ACCESS_DENIED;
|
|
return ;
|
|
}
|
|
|
|
//
|
|
// Update data
|
|
//
|
|
Status = UpdateLockBox (
|
|
&TempLockBoxParameterUpdate.Guid,
|
|
(UINTN)TempLockBoxParameterUpdate.Offset,
|
|
(VOID *)(UINTN)TempLockBoxParameterUpdate.Buffer,
|
|
(UINTN)TempLockBoxParameterUpdate.Length
|
|
);
|
|
LockBoxParameterUpdate->Header.ReturnStatus = (UINT64)Status;
|
|
return ;
|
|
}
|
|
|
|
/**
|
|
Dispatch function for SMM lock box restore.
|
|
|
|
Caution: This function may receive untrusted input.
|
|
Restore buffer and length are external input, so this function will validate
|
|
it is in SMRAM.
|
|
|
|
@param LockBoxParameterRestore parameter of lock box restore
|
|
**/
|
|
VOID
|
|
SmmLockBoxRestore (
|
|
IN EFI_SMM_LOCK_BOX_PARAMETER_RESTORE *LockBoxParameterRestore
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
EFI_SMM_LOCK_BOX_PARAMETER_RESTORE TempLockBoxParameterRestore;
|
|
|
|
CopyMem (&TempLockBoxParameterRestore, LockBoxParameterRestore, sizeof (EFI_SMM_LOCK_BOX_PARAMETER_RESTORE));
|
|
|
|
//
|
|
// Sanity check
|
|
//
|
|
if (!SmmIsBufferOutsideSmmValid ((UINTN)TempLockBoxParameterRestore.Buffer, (UINTN)TempLockBoxParameterRestore.Length)) {
|
|
DEBUG ((EFI_D_ERROR, "SmmLockBox Restore address in SMRAM or buffer overflow!\n"));
|
|
LockBoxParameterRestore->Header.ReturnStatus = (UINT64)EFI_ACCESS_DENIED;
|
|
return ;
|
|
}
|
|
|
|
//
|
|
// Restore data
|
|
//
|
|
if ((TempLockBoxParameterRestore.Length == 0) && (TempLockBoxParameterRestore.Buffer == 0)) {
|
|
Status = RestoreLockBox (
|
|
&TempLockBoxParameterRestore.Guid,
|
|
NULL,
|
|
NULL
|
|
);
|
|
} else {
|
|
Status = RestoreLockBox (
|
|
&TempLockBoxParameterRestore.Guid,
|
|
(VOID *)(UINTN)TempLockBoxParameterRestore.Buffer,
|
|
(UINTN *)&TempLockBoxParameterRestore.Length
|
|
);
|
|
}
|
|
LockBoxParameterRestore->Header.ReturnStatus = (UINT64)Status;
|
|
return ;
|
|
}
|
|
|
|
/**
|
|
Dispatch function for SMM lock box restore all in place.
|
|
|
|
@param LockBoxParameterRestoreAllInPlace parameter of lock box restore all in place
|
|
**/
|
|
VOID
|
|
SmmLockBoxRestoreAllInPlace (
|
|
IN EFI_SMM_LOCK_BOX_PARAMETER_RESTORE_ALL_IN_PLACE *LockBoxParameterRestoreAllInPlace
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
|
|
Status = RestoreAllLockBoxInPlace ();
|
|
LockBoxParameterRestoreAllInPlace->Header.ReturnStatus = (UINT64)Status;
|
|
return ;
|
|
}
|
|
|
|
/**
|
|
Dispatch function for a Software SMI handler.
|
|
|
|
Caution: This function may receive untrusted input.
|
|
Communicate buffer and buffer size are external input, so this function will do basic validation.
|
|
|
|
@param DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().
|
|
@param Context Points to an optional handler context which was specified when the
|
|
handler was registered.
|
|
@param CommBuffer A pointer to a collection of data in memory that will
|
|
be conveyed from a non-SMM environment into an SMM environment.
|
|
@param CommBufferSize The size of the CommBuffer.
|
|
|
|
@retval EFI_SUCCESS Command is handled successfully.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
SmmLockBoxHandler (
|
|
IN EFI_HANDLE DispatchHandle,
|
|
IN CONST VOID *Context OPTIONAL,
|
|
IN OUT VOID *CommBuffer OPTIONAL,
|
|
IN OUT UINTN *CommBufferSize OPTIONAL
|
|
)
|
|
{
|
|
EFI_SMM_LOCK_BOX_PARAMETER_HEADER *LockBoxParameterHeader;
|
|
UINTN TempCommBufferSize;
|
|
|
|
DEBUG ((DEBUG_INFO, "SmmLockBox SmmLockBoxHandler Enter\n"));
|
|
|
|
//
|
|
// If input is invalid, stop processing this SMI
|
|
//
|
|
if (CommBuffer == NULL || CommBufferSize == NULL) {
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
TempCommBufferSize = *CommBufferSize;
|
|
|
|
//
|
|
// Sanity check
|
|
//
|
|
if (TempCommBufferSize < sizeof(EFI_SMM_LOCK_BOX_PARAMETER_HEADER)) {
|
|
DEBUG ((EFI_D_ERROR, "SmmLockBox Command Buffer Size invalid!\n"));
|
|
return EFI_SUCCESS;
|
|
}
|
|
if (!SmmIsBufferOutsideSmmValid ((UINTN)CommBuffer, TempCommBufferSize)) {
|
|
DEBUG ((EFI_D_ERROR, "SmmLockBox Command Buffer in SMRAM or overflow!\n"));
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
LockBoxParameterHeader = (EFI_SMM_LOCK_BOX_PARAMETER_HEADER *)((UINTN)CommBuffer);
|
|
|
|
LockBoxParameterHeader->ReturnStatus = (UINT64)-1;
|
|
|
|
DEBUG ((DEBUG_INFO, "SmmLockBox LockBoxParameterHeader - %x\n", (UINTN)LockBoxParameterHeader));
|
|
|
|
DEBUG ((DEBUG_INFO, "SmmLockBox Command - %x\n", (UINTN)LockBoxParameterHeader->Command));
|
|
|
|
switch (LockBoxParameterHeader->Command) {
|
|
case EFI_SMM_LOCK_BOX_COMMAND_SAVE:
|
|
if (TempCommBufferSize < sizeof(EFI_SMM_LOCK_BOX_PARAMETER_SAVE)) {
|
|
DEBUG ((EFI_D_ERROR, "SmmLockBox Command Buffer Size for SAVE invalid!\n"));
|
|
break;
|
|
}
|
|
SmmLockBoxSave ((EFI_SMM_LOCK_BOX_PARAMETER_SAVE *)(UINTN)LockBoxParameterHeader);
|
|
break;
|
|
case EFI_SMM_LOCK_BOX_COMMAND_UPDATE:
|
|
if (TempCommBufferSize < sizeof(EFI_SMM_LOCK_BOX_PARAMETER_UPDATE)) {
|
|
DEBUG ((EFI_D_ERROR, "SmmLockBox Command Buffer Size for UPDATE invalid!\n"));
|
|
break;
|
|
}
|
|
SmmLockBoxUpdate ((EFI_SMM_LOCK_BOX_PARAMETER_UPDATE *)(UINTN)LockBoxParameterHeader);
|
|
break;
|
|
case EFI_SMM_LOCK_BOX_COMMAND_RESTORE:
|
|
if (TempCommBufferSize < sizeof(EFI_SMM_LOCK_BOX_PARAMETER_RESTORE)) {
|
|
DEBUG ((EFI_D_ERROR, "SmmLockBox Command Buffer Size for RESTORE invalid!\n"));
|
|
break;
|
|
}
|
|
SmmLockBoxRestore ((EFI_SMM_LOCK_BOX_PARAMETER_RESTORE *)(UINTN)LockBoxParameterHeader);
|
|
break;
|
|
case EFI_SMM_LOCK_BOX_COMMAND_SET_ATTRIBUTES:
|
|
if (TempCommBufferSize < sizeof(EFI_SMM_LOCK_BOX_PARAMETER_SET_ATTRIBUTES)) {
|
|
DEBUG ((EFI_D_ERROR, "SmmLockBox Command Buffer Size for SET_ATTRIBUTES invalid!\n"));
|
|
break;
|
|
}
|
|
SmmLockBoxSetAttributes ((EFI_SMM_LOCK_BOX_PARAMETER_SET_ATTRIBUTES *)(UINTN)LockBoxParameterHeader);
|
|
break;
|
|
case EFI_SMM_LOCK_BOX_COMMAND_RESTORE_ALL_IN_PLACE:
|
|
if (TempCommBufferSize < sizeof(EFI_SMM_LOCK_BOX_PARAMETER_RESTORE_ALL_IN_PLACE)) {
|
|
DEBUG ((EFI_D_ERROR, "SmmLockBox Command Buffer Size for RESTORE_ALL_IN_PLACE invalid!\n"));
|
|
break;
|
|
}
|
|
SmmLockBoxRestoreAllInPlace ((EFI_SMM_LOCK_BOX_PARAMETER_RESTORE_ALL_IN_PLACE *)(UINTN)LockBoxParameterHeader);
|
|
break;
|
|
default:
|
|
DEBUG ((EFI_D_ERROR, "SmmLockBox Command invalid!\n"));
|
|
break;
|
|
}
|
|
|
|
LockBoxParameterHeader->Command = (UINT32)-1;
|
|
|
|
DEBUG ((DEBUG_INFO, "SmmLockBox SmmLockBoxHandler Exit\n"));
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
Smm Ready To Lock event notification handler.
|
|
|
|
It sets a flag indicating that SMRAM has been locked.
|
|
|
|
@param[in] Protocol Points to the protocol's unique identifier.
|
|
@param[in] Interface Points to the interface instance.
|
|
@param[in] Handle The handle on which the interface was installed.
|
|
|
|
@retval EFI_SUCCESS Notification handler runs successfully.
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
SmmReadyToLockEventNotify (
|
|
IN CONST EFI_GUID *Protocol,
|
|
IN VOID *Interface,
|
|
IN EFI_HANDLE Handle
|
|
)
|
|
{
|
|
mLocked = TRUE;
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
Entry Point for LockBox SMM driver.
|
|
|
|
@param[in] ImageHandle Image handle of this driver.
|
|
@param[in] SystemTable A Pointer to the EFI System Table.
|
|
|
|
@retval EFI_SUCEESS
|
|
@return Others Some error occurs.
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
SmmLockBoxEntryPoint (
|
|
IN EFI_HANDLE ImageHandle,
|
|
IN EFI_SYSTEM_TABLE *SystemTable
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
EFI_HANDLE DispatchHandle;
|
|
VOID *Registration;
|
|
|
|
//
|
|
// Register LockBox communication handler
|
|
//
|
|
Status = gSmst->SmiHandlerRegister (
|
|
SmmLockBoxHandler,
|
|
&gEfiSmmLockBoxCommunicationGuid,
|
|
&DispatchHandle
|
|
);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
//
|
|
// Register SMM Ready To Lock Protocol notification
|
|
//
|
|
Status = gSmst->SmmRegisterProtocolNotify (
|
|
&gEfiSmmReadyToLockProtocolGuid,
|
|
SmmReadyToLockEventNotify,
|
|
&Registration
|
|
);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
//
|
|
// Install NULL to DXE data base as notify
|
|
//
|
|
ImageHandle = NULL;
|
|
Status = gBS->InstallProtocolInterface (
|
|
&ImageHandle,
|
|
&gEfiLockBoxProtocolGuid,
|
|
EFI_NATIVE_INTERFACE,
|
|
NULL
|
|
);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
return Status;
|
|
}
|