diff options
Diffstat (limited to 'SecurityPkg/Tcg/MemoryOverwriteRequestControlLock/TcgMorLockSmm.c')
| -rw-r--r-- | SecurityPkg/Tcg/MemoryOverwriteRequestControlLock/TcgMorLockSmm.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/SecurityPkg/Tcg/MemoryOverwriteRequestControlLock/TcgMorLockSmm.c b/SecurityPkg/Tcg/MemoryOverwriteRequestControlLock/TcgMorLockSmm.c new file mode 100644 index 0000000000..019cb8bb24 --- /dev/null +++ b/SecurityPkg/Tcg/MemoryOverwriteRequestControlLock/TcgMorLockSmm.c @@ -0,0 +1,158 @@ +/** @file
+ TCG MOR (Memory Overwrite Request) Lock Control Driver SMM wrapper.
+
+Copyright (c) 2015, 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/SmmServicesTableLib.h>
+#include <Library/DebugLib.h>
+#include <Protocol/SmmVarCheck.h>
+#include <Protocol/SmmVariable.h>
+#include "TcgMorLock.h"
+
+EFI_SMM_VARIABLE_PROTOCOL *mSmmVariable;
+
+/**
+ This service is a wrapper for the UEFI Runtime Service GetVariable().
+
+ @param VariableName the name of the vendor's variable, it's a Null-Terminated Unicode String
+ @param VendorGuid Unify identifier for vendor.
+ @param Attributes Point to memory location to return the attributes of variable. If the point
+ is NULL, the parameter would be ignored.
+ @param DataSize As input, point to the maximum size of return Data-Buffer.
+ As output, point to the actual size of the returned Data-Buffer.
+ @param Data Point to return Data-Buffer.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_NOT_FOUND The variable was not found.
+ @retval EFI_BUFFER_TOO_SMALL The DataSize is too small for the result. DataSize has
+ been updated with the size needed to complete the request.
+ @retval EFI_INVALID_PARAMETER VariableName is NULL.
+ @retval EFI_INVALID_PARAMETER VendorGuid is NULL.
+ @retval EFI_INVALID_PARAMETER DataSize is NULL.
+ @retval EFI_INVALID_PARAMETER The DataSize is not too small and Data is NULL.
+ @retval EFI_DEVICE_ERROR The variable could not be retrieved due to a hardware error.
+ @retval EFI_SECURITY_VIOLATION The variable could not be retrieved due to an authentication failure.
+**/
+EFI_STATUS
+EFIAPI
+InternalGetVariable (
+ IN CHAR16 *VariableName,
+ IN EFI_GUID *VendorGuid,
+ OUT UINT32 *Attributes OPTIONAL,
+ IN OUT UINTN *DataSize,
+ OUT VOID *Data
+ )
+{
+ return mSmmVariable->SmmGetVariable (
+ VariableName,
+ VendorGuid,
+ Attributes,
+ DataSize,
+ Data
+ );
+}
+
+/**
+ This service is a wrapper for the UEFI Runtime Service SetVariable()
+
+ @param VariableName the name of the vendor's variable, as a
+ Null-Terminated Unicode String
+ @param VendorGuid Unify identifier for vendor.
+ @param Attributes Point to memory location to return the attributes of variable. If the point
+ is NULL, the parameter would be ignored.
+ @param DataSize The size in bytes of Data-Buffer.
+ @param Data Point to the content of the variable.
+
+ @retval EFI_SUCCESS The firmware has successfully stored the variable and its data as
+ defined by the Attributes.
+ @retval EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied, or the
+ DataSize exceeds the maximum allowed.
+ @retval EFI_INVALID_PARAMETER VariableName is an empty Unicode string.
+ @retval EFI_OUT_OF_RESOURCES Not enough storage is available to hold the variable and its data.
+ @retval EFI_DEVICE_ERROR The variable could not be saved due to a hardware failure.
+ @retval EFI_WRITE_PROTECTED The variable in question is read-only.
+ @retval EFI_WRITE_PROTECTED The variable in question cannot be deleted.
+ @retval EFI_SECURITY_VIOLATION The variable could not be written due to EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS
+ set but the AuthInfo does NOT pass the validation check carried
+ out by the firmware.
+ @retval EFI_NOT_FOUND The variable trying to be updated or deleted was not found.
+
+**/
+EFI_STATUS
+EFIAPI
+InternalSetVariable (
+ IN CHAR16 *VariableName,
+ IN EFI_GUID *VendorGuid,
+ IN UINT32 Attributes,
+ IN UINTN DataSize,
+ IN VOID *Data
+ )
+{
+ return mSmmVariable->SmmSetVariable (
+ VariableName,
+ VendorGuid,
+ Attributes,
+ DataSize,
+ Data
+ );
+}
+
+/**
+ Entry Point for MOR Lock Control driver.
+
+ @param[in] ImageHandle The firmware allocated handle for the EFI image.
+ @param[in] SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS EntryPoint runs successfully.
+
+**/
+EFI_STATUS
+EFIAPI
+MorLockDriverEntryPointSmm (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+ EDKII_SMM_VAR_CHECK_PROTOCOL *SmmVarCheck;
+
+ //
+ // This driver link to Smm Variable driver
+ //
+ DEBUG ((EFI_D_INFO, "MorLockDriverEntryPointSmm\n"));
+
+ Status = gSmst->SmmLocateProtocol (
+ &gEfiSmmVariableProtocolGuid,
+ NULL,
+ (VOID **) &mSmmVariable
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ Status = gSmst->SmmLocateProtocol (
+ &gEdkiiSmmVarCheckProtocolGuid,
+ NULL,
+ (VOID **) &SmmVarCheck
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ Status = MorLockDriverInit ();
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = SmmVarCheck->SmmRegisterSetVariableCheckHandler (SetVariableCheckHandlerMor);
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
+
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