diff options
Diffstat (limited to 'MdeModulePkg/Library/VarCheckUefiLib/VarCheckUefiLibNullClass.c')
| -rw-r--r-- | MdeModulePkg/Library/VarCheckUefiLib/VarCheckUefiLibNullClass.c | 1894 |
1 files changed, 947 insertions, 947 deletions
diff --git a/MdeModulePkg/Library/VarCheckUefiLib/VarCheckUefiLibNullClass.c b/MdeModulePkg/Library/VarCheckUefiLib/VarCheckUefiLibNullClass.c index 9fbfd9df02..416ddc8888 100644 --- a/MdeModulePkg/Library/VarCheckUefiLib/VarCheckUefiLibNullClass.c +++ b/MdeModulePkg/Library/VarCheckUefiLib/VarCheckUefiLibNullClass.c @@ -1,947 +1,947 @@ -/** @file
- Implementation functions and structures for var check uefi library.
-
-Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
-SPDX-License-Identifier: BSD-2-Clause-Patent
-
-**/
-
-#include <Uefi/UefiBaseType.h>
-
-#include <Library/VarCheckLib.h>
-#include <Library/BaseLib.h>
-#include <Library/BaseMemoryLib.h>
-#include <Library/DebugLib.h>
-#include <Library/DevicePathLib.h>
-
-#include <Guid/VariableFormat.h>
-#include <Guid/GlobalVariable.h>
-#include <Guid/HardwareErrorVariable.h>
-#include <Guid/ImageAuthentication.h>
-
-typedef
-EFI_STATUS
-(EFIAPI *INTERNAL_VAR_CHECK_FUNCTION)(
- IN VAR_CHECK_VARIABLE_PROPERTY *Propery,
- IN UINTN DataSize,
- IN VOID *Data
- );
-
-typedef struct {
- CHAR16 *Name;
- VAR_CHECK_VARIABLE_PROPERTY VariableProperty;
- INTERNAL_VAR_CHECK_FUNCTION CheckFunction;
-} UEFI_DEFINED_VARIABLE_ENTRY;
-
-/**
- Internal check for load option.
-
- @param[in] VariablePropery Pointer to variable property.
- @param[in] DataSize Data size.
- @param[in] Data Pointer to data buffer.
-
- @retval EFI_SUCCESS The SetVariable check result was success.
- @retval EFI_INVALID_PARAMETER The data buffer is not a valid load option.
-
-**/
-EFI_STATUS
-EFIAPI
-InternalVarCheckLoadOption (
- IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery,
- IN UINTN DataSize,
- IN VOID *Data
- )
-{
- UINT16 FilePathListLength;
- CHAR16 *Description;
- EFI_DEVICE_PATH_PROTOCOL *FilePathList;
-
- FilePathListLength = *((UINT16 *)((UINTN)Data + sizeof (UINT32)));
-
- //
- // Check Description
- //
- Description = (CHAR16 *)((UINTN)Data + sizeof (UINT32) + sizeof (UINT16));
- while (Description < (CHAR16 *)((UINTN)Data + DataSize)) {
- if (*Description == L'\0') {
- break;
- }
-
- Description++;
- }
-
- if ((UINTN)Description >= ((UINTN)Data + DataSize)) {
- return EFI_INVALID_PARAMETER;
- }
-
- Description++;
-
- //
- // Check FilePathList
- //
- FilePathList = (EFI_DEVICE_PATH_PROTOCOL *)Description;
- if ((UINTN)FilePathList > (MAX_ADDRESS - FilePathListLength)) {
- return EFI_INVALID_PARAMETER;
- }
-
- if (((UINTN)FilePathList + FilePathListLength) > ((UINTN)Data + DataSize)) {
- return EFI_INVALID_PARAMETER;
- }
-
- if (FilePathListLength < sizeof (EFI_DEVICE_PATH_PROTOCOL)) {
- return EFI_INVALID_PARAMETER;
- }
-
- if (!IsDevicePathValid (FilePathList, FilePathListLength)) {
- return EFI_INVALID_PARAMETER;
- }
-
- return EFI_SUCCESS;
-}
-
-/**
- Internal check for key option.
-
- @param[in] VariablePropery Pointer to variable property.
- @param[in] DataSize Data size.
- @param[in] Data Pointer to data buffer.
-
- @retval EFI_SUCCESS The SetVariable check result was success.
- @retval EFI_INVALID_PARAMETER The data buffer is not a valid key option.
-
-**/
-EFI_STATUS
-EFIAPI
-InternalVarCheckKeyOption (
- IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery,
- IN UINTN DataSize,
- IN VOID *Data
- )
-{
- if (((DataSize - sizeof (EFI_KEY_OPTION)) % sizeof (EFI_INPUT_KEY)) != 0) {
- return EFI_INVALID_PARAMETER;
- }
-
- return EFI_SUCCESS;
-}
-
-/**
- Internal check for device path.
-
- @param[in] VariablePropery Pointer to variable property.
- @param[in] DataSize Data size.
- @param[in] Data Pointer to data buffer.
-
- @retval EFI_SUCCESS The SetVariable check result was success.
- @retval EFI_INVALID_PARAMETER The data buffer is not a valid device path.
-
-**/
-EFI_STATUS
-EFIAPI
-InternalVarCheckDevicePath (
- IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery,
- IN UINTN DataSize,
- IN VOID *Data
- )
-{
- if (!IsDevicePathValid ((EFI_DEVICE_PATH_PROTOCOL *)Data, DataSize)) {
- return EFI_INVALID_PARAMETER;
- }
-
- return EFI_SUCCESS;
-}
-
-/**
- Internal check for ASCII string.
-
- @param[in] VariablePropery Pointer to variable property.
- @param[in] DataSize Data size.
- @param[in] Data Pointer to data buffer.
-
- @retval EFI_SUCCESS The SetVariable check result was success.
- @retval EFI_INVALID_PARAMETER The data buffer is not a Null-terminated ASCII string.
-
-**/
-EFI_STATUS
-EFIAPI
-InternalVarCheckAsciiString (
- IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery,
- IN UINTN DataSize,
- IN VOID *Data
- )
-{
- CHAR8 *String;
- UINTN Index;
-
- String = (CHAR8 *)Data;
- if (String[DataSize - 1] == '\0') {
- return EFI_SUCCESS;
- } else {
- for (Index = 1; Index < DataSize && (String[DataSize - 1 - Index] != '\0'); Index++) {
- }
-
- if (Index == DataSize) {
- return EFI_INVALID_PARAMETER;
- }
- }
-
- return EFI_SUCCESS;
-}
-
-/**
- Internal check for size array.
-
- @param[in] VariablePropery Pointer to variable property.
- @param[in] DataSize Data size.
- @param[in] Data Pointer to data buffer.
-
- @retval EFI_SUCCESS The SetVariable check result was success.
- @retval EFI_INVALID_PARAMETER The DataSize is not size array.
-
-**/
-EFI_STATUS
-EFIAPI
-InternalVarCheckSizeArray (
- IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery,
- IN UINTN DataSize,
- IN VOID *Data
- )
-{
- if ((DataSize % VariablePropery->MinSize) != 0) {
- return EFI_INVALID_PARAMETER;
- }
-
- return EFI_SUCCESS;
-}
-
-//
-// To prevent name collisions with possible future globally defined variables,
-// other internal firmware data variables that are not defined here must be
-// saved with a unique VendorGuid other than EFI_GLOBAL_VARIABLE or
-// any other GUID defined by the UEFI Specification. Implementations must
-// only permit the creation of variables with a UEFI Specification-defined
-// VendorGuid when these variables are documented in the UEFI Specification.
-//
-UEFI_DEFINED_VARIABLE_ENTRY mGlobalVariableList[] = {
- {
- EFI_LANG_CODES_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_BS_RT,
- 1,
- MAX_UINTN
- },
- InternalVarCheckAsciiString
- },
- {
- EFI_LANG_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT,
- 1,
- MAX_UINTN
- },
- InternalVarCheckAsciiString
- },
- {
- EFI_TIME_OUT_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT,
- sizeof (UINT16),
- sizeof (UINT16)
- },
- NULL
- },
- {
- EFI_PLATFORM_LANG_CODES_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_BS_RT,
- 1,
- MAX_UINTN
- },
- InternalVarCheckAsciiString
- },
- {
- EFI_PLATFORM_LANG_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT,
- 1,
- MAX_UINTN
- },
- InternalVarCheckAsciiString
- },
- {
- EFI_CON_IN_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT,
- sizeof (EFI_DEVICE_PATH_PROTOCOL),
- MAX_UINTN
- },
- InternalVarCheckDevicePath
- },
- {
- EFI_CON_OUT_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT,
- sizeof (EFI_DEVICE_PATH_PROTOCOL),
- MAX_UINTN
- },
- InternalVarCheckDevicePath
- },
- {
- EFI_ERR_OUT_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT,
- sizeof (EFI_DEVICE_PATH_PROTOCOL),
- MAX_UINTN
- },
- InternalVarCheckDevicePath
- },
- {
- EFI_CON_IN_DEV_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_BS_RT,
- sizeof (EFI_DEVICE_PATH_PROTOCOL),
- MAX_UINTN
- },
- InternalVarCheckDevicePath
- },
- {
- EFI_CON_OUT_DEV_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_BS_RT,
- sizeof (EFI_DEVICE_PATH_PROTOCOL),
- MAX_UINTN
- },
- InternalVarCheckDevicePath
- },
- {
- EFI_ERR_OUT_DEV_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_BS_RT,
- sizeof (EFI_DEVICE_PATH_PROTOCOL),
- MAX_UINTN
- },
- InternalVarCheckDevicePath
- },
- {
- EFI_BOOT_ORDER_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT,
- sizeof (UINT16),
- MAX_UINTN
- },
- InternalVarCheckSizeArray
- },
- {
- EFI_BOOT_NEXT_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT,
- sizeof (UINT16),
- sizeof (UINT16)
- },
- NULL
- },
- {
- EFI_BOOT_CURRENT_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_BS_RT,
- sizeof (UINT16),
- sizeof (UINT16)
- },
- NULL
- },
- {
- EFI_BOOT_OPTION_SUPPORT_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_BS_RT,
- sizeof (UINT32),
- sizeof (UINT32)
- },
- NULL
- },
- {
- EFI_DRIVER_ORDER_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT,
- sizeof (UINT16),
- MAX_UINTN
- },
- InternalVarCheckSizeArray
- },
- {
- EFI_SYS_PREP_ORDER_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT,
- sizeof (UINT16),
- MAX_UINTN
- },
- InternalVarCheckSizeArray
- },
- {
- EFI_HW_ERR_REC_SUPPORT_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT,
- sizeof (UINT16),
- sizeof (UINT16)
- },
- NULL
- },
- {
- EFI_SETUP_MODE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,
- VARIABLE_ATTRIBUTE_BS_RT,
- sizeof (UINT8),
- sizeof (UINT8)
- },
- NULL
- },
- {
- EFI_KEY_EXCHANGE_KEY_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT_AT,
- 1,
- MAX_UINTN
- },
- NULL
- },
- {
- EFI_PLATFORM_KEY_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT_AT,
- 1,
- MAX_UINTN
- },
- NULL
- },
- {
- EFI_SIGNATURE_SUPPORT_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,
- VARIABLE_ATTRIBUTE_BS_RT,
- sizeof (EFI_GUID),
- MAX_UINTN
- },
- InternalVarCheckSizeArray
- },
- {
- EFI_SECURE_BOOT_MODE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,
- VARIABLE_ATTRIBUTE_BS_RT,
- sizeof (UINT8),
- sizeof (UINT8)
- },
- NULL
- },
- {
- EFI_KEK_DEFAULT_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,
- VARIABLE_ATTRIBUTE_BS_RT,
- 1,
- MAX_UINTN
- },
- NULL
- },
- {
- EFI_PK_DEFAULT_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,
- VARIABLE_ATTRIBUTE_BS_RT,
- 1,
- MAX_UINTN
- },
- NULL
- },
- {
- EFI_DB_DEFAULT_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,
- VARIABLE_ATTRIBUTE_BS_RT,
- 1,
- MAX_UINTN
- },
- NULL
- },
- {
- EFI_DBX_DEFAULT_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,
- VARIABLE_ATTRIBUTE_BS_RT,
- 1,
- MAX_UINTN
- },
- NULL
- },
- {
- EFI_DBT_DEFAULT_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,
- VARIABLE_ATTRIBUTE_BS_RT,
- 1,
- MAX_UINTN
- },
- NULL
- },
- {
- EFI_OS_INDICATIONS_SUPPORT_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_BS_RT,
- sizeof (UINT64),
- sizeof (UINT64)
- },
- NULL
- },
- {
- EFI_OS_INDICATIONS_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT,
- sizeof (UINT64),
- sizeof (UINT64)
- },
- NULL
- },
- {
- EFI_VENDOR_KEYS_VARIABLE_NAME,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,
- VARIABLE_ATTRIBUTE_BS_RT,
- sizeof (UINT8),
- sizeof (UINT8)
- },
- NULL
- },
-};
-
-UEFI_DEFINED_VARIABLE_ENTRY mGlobalVariableList2[] = {
- {
- L"Boot####",
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT,
- sizeof (UINT32) + sizeof (UINT16),
- MAX_UINTN
- },
- InternalVarCheckLoadOption
- },
- {
- L"Driver####",
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT,
- sizeof (UINT32) + sizeof (UINT16),
- MAX_UINTN
- },
- InternalVarCheckLoadOption
- },
- {
- L"SysPrep####",
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT,
- sizeof (UINT32) + sizeof (UINT16),
- MAX_UINTN
- },
- InternalVarCheckLoadOption
- },
- {
- L"Key####",
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT,
- sizeof (EFI_KEY_OPTION),
- sizeof (EFI_KEY_OPTION) + 3 * sizeof (EFI_INPUT_KEY)
- },
- InternalVarCheckKeyOption
- },
- {
- L"PlatformRecovery####",
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_BS_RT,
- sizeof (UINT32) + sizeof (UINT16),
- MAX_UINTN
- },
- InternalVarCheckLoadOption
- },
-};
-
-//
-// EFI_IMAGE_SECURITY_DATABASE_GUID
-//
-UEFI_DEFINED_VARIABLE_ENTRY mImageSecurityVariableList[] = {
- {
- EFI_IMAGE_SECURITY_DATABASE,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT_AT,
- 1,
- MAX_UINTN
- },
- NULL
- },
- {
- EFI_IMAGE_SECURITY_DATABASE1,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT_AT,
- 1,
- MAX_UINTN
- },
- NULL
- },
- {
- EFI_IMAGE_SECURITY_DATABASE2,
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT_AT,
- 1,
- MAX_UINTN
- },
- NULL
- },
-};
-
-//
-// EFI_HARDWARE_ERROR_VARIABLE
-//
-UEFI_DEFINED_VARIABLE_ENTRY mHwErrRecVariable = {
- L"HwErrRec####",
- {
- VAR_CHECK_VARIABLE_PROPERTY_REVISION,
- 0,
- VARIABLE_ATTRIBUTE_NV_BS_RT_HR,
- 1,
- MAX_UINTN
- },
- NULL
-};
-
-EFI_GUID *mUefiDefinedGuid[] = {
- &gEfiGlobalVariableGuid,
- &gEfiImageSecurityDatabaseGuid,
- &gEfiHardwareErrorVariableGuid
-};
-
-/**
- Check if a Unicode character is an upper case hexadecimal character.
-
- This function checks if a Unicode character is an upper case
- hexadecimal character. The valid upper case hexadecimal character is
- L'0' to L'9', or L'A' to L'F'.
-
-
- @param[in] Char The character to check against.
-
- @retval TRUE If the Char is an upper case hexadecmial character.
- @retval FALSE If the Char is not an upper case hexadecmial character.
-
-**/
-BOOLEAN
-EFIAPI
-VarCheckUefiIsHexaDecimalDigitCharacter (
- IN CHAR16 Char
- )
-{
- return (BOOLEAN)((Char >= L'0' && Char <= L'9') || (Char >= L'A' && Char <= L'F'));
-}
-
-/**
-
- This code checks if variable is hardware error record variable or not.
-
- According to UEFI spec, hardware error record variable should use the EFI_HARDWARE_ERROR_VARIABLE VendorGuid
- and have the L"HwErrRec####" name convention, #### is a printed hex value and no 0x or h is included in the hex value.
-
- @param[in] VariableName Pointer to variable name.
- @param[in] VendorGuid Variable Vendor Guid.
-
- @retval TRUE Variable is hardware error record variable.
- @retval FALSE Variable is not hardware error record variable.
-
-**/
-BOOLEAN
-EFIAPI
-IsHwErrRecVariable (
- IN CHAR16 *VariableName,
- IN EFI_GUID *VendorGuid
- )
-{
- if (!CompareGuid (VendorGuid, &gEfiHardwareErrorVariableGuid) ||
- (StrLen (VariableName) != StrLen (L"HwErrRec####")) ||
- (StrnCmp (VariableName, L"HwErrRec", StrLen (L"HwErrRec")) != 0) ||
- !VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[0x8]) ||
- !VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[0x9]) ||
- !VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[0xA]) ||
- !VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[0xB]))
- {
- return FALSE;
- }
-
- return TRUE;
-}
-
-/**
- Get UEFI defined var check function.
-
- @param[in] VariableName Pointer to variable name.
- @param[in] VendorGuid Pointer to variable vendor GUID.
- @param[out] VariableProperty Pointer to variable property.
-
- @return Internal var check function, NULL if no specific check function.
-
-**/
-INTERNAL_VAR_CHECK_FUNCTION
-GetUefiDefinedVarCheckFunction (
- IN CHAR16 *VariableName,
- IN EFI_GUID *VendorGuid,
- OUT VAR_CHECK_VARIABLE_PROPERTY **VariableProperty
- )
-{
- UINTN Index;
- UINTN NameLength;
-
- if (CompareGuid (VendorGuid, &gEfiGlobalVariableGuid)) {
- //
- // Try list 1, exactly match.
- //
- for (Index = 0; Index < sizeof (mGlobalVariableList)/sizeof (mGlobalVariableList[0]); Index++) {
- if (StrCmp (mGlobalVariableList[Index].Name, VariableName) == 0) {
- *VariableProperty = &(mGlobalVariableList[Index].VariableProperty);
- return mGlobalVariableList[Index].CheckFunction;
- }
- }
-
- //
- // Try list 2.
- //
- NameLength = StrLen (VariableName) - 4;
- for (Index = 0; Index < sizeof (mGlobalVariableList2)/sizeof (mGlobalVariableList2[0]); Index++) {
- if ((StrLen (VariableName) == StrLen (mGlobalVariableList2[Index].Name)) &&
- (StrnCmp (VariableName, mGlobalVariableList2[Index].Name, NameLength) == 0) &&
- VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[NameLength]) &&
- VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[NameLength + 1]) &&
- VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[NameLength + 2]) &&
- VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[NameLength + 3]))
- {
- *VariableProperty = &(mGlobalVariableList2[Index].VariableProperty);
- return mGlobalVariableList2[Index].CheckFunction;
- }
- }
- }
-
- return NULL;
-}
-
-/**
- SetVariable check handler UEFI defined.
-
- @param[in] VariableName Name of Variable to set.
- @param[in] VendorGuid Variable vendor GUID.
- @param[in] Attributes Attribute value of the variable.
- @param[in] DataSize Size of Data to set.
- @param[in] Data Data pointer.
-
- @retval EFI_SUCCESS The SetVariable check result was success.
- @retval EFI_INVALID_PARAMETER An invalid combination of attribute bits, name, GUID,
- DataSize and Data value was supplied.
- @retval EFI_WRITE_PROTECTED The variable in question is read-only.
-
-**/
-EFI_STATUS
-EFIAPI
-SetVariableCheckHandlerUefiDefined (
- IN CHAR16 *VariableName,
- IN EFI_GUID *VendorGuid,
- IN UINT32 Attributes,
- IN UINTN DataSize,
- IN VOID *Data
- )
-{
- EFI_STATUS Status;
- UINTN Index;
- VAR_CHECK_VARIABLE_PROPERTY Property;
- VAR_CHECK_VARIABLE_PROPERTY *VarCheckProperty;
- INTERNAL_VAR_CHECK_FUNCTION VarCheckFunction;
-
- if ((((Attributes & EFI_VARIABLE_APPEND_WRITE) == 0) && (DataSize == 0)) || (Attributes == 0)) {
- //
- // Do not check delete variable.
- //
- return EFI_SUCCESS;
- }
-
- if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {
- if (!IsHwErrRecVariable (VariableName, VendorGuid)) {
- return EFI_INVALID_PARAMETER;
- }
- }
-
- for (Index = 0; Index < sizeof (mUefiDefinedGuid)/sizeof (mUefiDefinedGuid[0]); Index++) {
- if (CompareGuid (VendorGuid, mUefiDefinedGuid[Index])) {
- if (VarCheckLibVariablePropertyGet (VariableName, VendorGuid, &Property) == EFI_NOT_FOUND) {
- //
- // To prevent name collisions with possible future globally defined variables,
- // other internal firmware data variables that are not defined here must be
- // saved with a unique VendorGuid other than EFI_GLOBAL_VARIABLE or
- // any other GUID defined by the UEFI Specification. Implementations must
- // only permit the creation of variables with a UEFI Specification-defined
- // VendorGuid when these variables are documented in the UEFI Specification.
- //
- DEBUG ((DEBUG_INFO, "UEFI Variable Check fail %r - %s not in %g namespace\n", EFI_INVALID_PARAMETER, VariableName, VendorGuid));
- return EFI_INVALID_PARAMETER;
- }
- }
- }
-
- if (DataSize == 0) {
- return EFI_SUCCESS;
- }
-
- VarCheckProperty = NULL;
- VarCheckFunction = GetUefiDefinedVarCheckFunction (VariableName, VendorGuid, &VarCheckProperty);
- if (VarCheckFunction != NULL) {
- Status = VarCheckFunction (
- VarCheckProperty,
- DataSize,
- Data
- );
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_INFO, "UEFI Variable Check function fail %r - %g:%s\n", Status, VendorGuid, VariableName));
- return Status;
- }
- }
-
- return EFI_SUCCESS;
-}
-
-/**
- Variable property set for UEFI defined variables.
-
-**/
-VOID
-VariablePropertySetUefiDefined (
- VOID
- )
-{
- UINTN Index;
-
- //
- // EFI_GLOBAL_VARIABLE
- //
- for (Index = 0; Index < sizeof (mGlobalVariableList)/sizeof (mGlobalVariableList[0]); Index++) {
- VarCheckLibVariablePropertySet (
- mGlobalVariableList[Index].Name,
- &gEfiGlobalVariableGuid,
- &mGlobalVariableList[Index].VariableProperty
- );
- }
-
- for (Index = 0; Index < sizeof (mGlobalVariableList2)/sizeof (mGlobalVariableList2[0]); Index++) {
- VarCheckLibVariablePropertySet (
- mGlobalVariableList2[Index].Name,
- &gEfiGlobalVariableGuid,
- &mGlobalVariableList2[Index].VariableProperty
- );
- }
-
- //
- // EFI_IMAGE_SECURITY_DATABASE_GUID
- //
- for (Index = 0; Index < sizeof (mImageSecurityVariableList)/sizeof (mImageSecurityVariableList[0]); Index++) {
- VarCheckLibVariablePropertySet (
- mImageSecurityVariableList[Index].Name,
- &gEfiImageSecurityDatabaseGuid,
- &mImageSecurityVariableList[Index].VariableProperty
- );
- }
-
- //
- // EFI_HARDWARE_ERROR_VARIABLE
- //
- VarCheckLibVariablePropertySet (
- mHwErrRecVariable.Name,
- &gEfiHardwareErrorVariableGuid,
- &mHwErrRecVariable.VariableProperty
- );
-}
-
-/**
- Constructor function of VarCheckUefiLib to set property and
- register SetVariable check handler for UEFI defined variables.
-
- @retval EFI_SUCCESS The constructor executed correctly.
-
-**/
-RETURN_STATUS
-EFIAPI
-VarCheckUefiLibNullClassConstructor (
- VOID
- )
-{
- VariablePropertySetUefiDefined ();
- VarCheckLibRegisterSetVariableCheckHandler (SetVariableCheckHandlerUefiDefined);
-
- return RETURN_SUCCESS;
-}
+/** @file + Implementation functions and structures for var check uefi library. + +Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR> +SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include <Uefi/UefiBaseType.h> + +#include <Library/VarCheckLib.h> +#include <Library/BaseLib.h> +#include <Library/BaseMemoryLib.h> +#include <Library/DebugLib.h> +#include <Library/DevicePathLib.h> + +#include <Guid/VariableFormat.h> +#include <Guid/GlobalVariable.h> +#include <Guid/HardwareErrorVariable.h> +#include <Guid/ImageAuthentication.h> + +typedef +EFI_STATUS +(EFIAPI *INTERNAL_VAR_CHECK_FUNCTION)( + IN VAR_CHECK_VARIABLE_PROPERTY *Propery, + IN UINTN DataSize, + IN VOID *Data + ); + +typedef struct { + CHAR16 *Name; + VAR_CHECK_VARIABLE_PROPERTY VariableProperty; + INTERNAL_VAR_CHECK_FUNCTION CheckFunction; +} UEFI_DEFINED_VARIABLE_ENTRY; + +/** + Internal check for load option. + + @param[in] VariablePropery Pointer to variable property. + @param[in] DataSize Data size. + @param[in] Data Pointer to data buffer. + + @retval EFI_SUCCESS The SetVariable check result was success. + @retval EFI_INVALID_PARAMETER The data buffer is not a valid load option. + +**/ +EFI_STATUS +EFIAPI +InternalVarCheckLoadOption ( + IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery, + IN UINTN DataSize, + IN VOID *Data + ) +{ + UINT16 FilePathListLength; + CHAR16 *Description; + EFI_DEVICE_PATH_PROTOCOL *FilePathList; + + FilePathListLength = *((UINT16 *)((UINTN)Data + sizeof (UINT32))); + + // + // Check Description + // + Description = (CHAR16 *)((UINTN)Data + sizeof (UINT32) + sizeof (UINT16)); + while (Description < (CHAR16 *)((UINTN)Data + DataSize)) { + if (*Description == L'\0') { + break; + } + + Description++; + } + + if ((UINTN)Description >= ((UINTN)Data + DataSize)) { + return EFI_INVALID_PARAMETER; + } + + Description++; + + // + // Check FilePathList + // + FilePathList = (EFI_DEVICE_PATH_PROTOCOL *)Description; + if ((UINTN)FilePathList > (MAX_ADDRESS - FilePathListLength)) { + return EFI_INVALID_PARAMETER; + } + + if (((UINTN)FilePathList + FilePathListLength) > ((UINTN)Data + DataSize)) { + return EFI_INVALID_PARAMETER; + } + + if (FilePathListLength < sizeof (EFI_DEVICE_PATH_PROTOCOL)) { + return EFI_INVALID_PARAMETER; + } + + if (!IsDevicePathValid (FilePathList, FilePathListLength)) { + return EFI_INVALID_PARAMETER; + } + + return EFI_SUCCESS; +} + +/** + Internal check for key option. + + @param[in] VariablePropery Pointer to variable property. + @param[in] DataSize Data size. + @param[in] Data Pointer to data buffer. + + @retval EFI_SUCCESS The SetVariable check result was success. + @retval EFI_INVALID_PARAMETER The data buffer is not a valid key option. + +**/ +EFI_STATUS +EFIAPI +InternalVarCheckKeyOption ( + IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery, + IN UINTN DataSize, + IN VOID *Data + ) +{ + if (((DataSize - sizeof (EFI_KEY_OPTION)) % sizeof (EFI_INPUT_KEY)) != 0) { + return EFI_INVALID_PARAMETER; + } + + return EFI_SUCCESS; +} + +/** + Internal check for device path. + + @param[in] VariablePropery Pointer to variable property. + @param[in] DataSize Data size. + @param[in] Data Pointer to data buffer. + + @retval EFI_SUCCESS The SetVariable check result was success. + @retval EFI_INVALID_PARAMETER The data buffer is not a valid device path. + +**/ +EFI_STATUS +EFIAPI +InternalVarCheckDevicePath ( + IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery, + IN UINTN DataSize, + IN VOID *Data + ) +{ + if (!IsDevicePathValid ((EFI_DEVICE_PATH_PROTOCOL *)Data, DataSize)) { + return EFI_INVALID_PARAMETER; + } + + return EFI_SUCCESS; +} + +/** + Internal check for ASCII string. + + @param[in] VariablePropery Pointer to variable property. + @param[in] DataSize Data size. + @param[in] Data Pointer to data buffer. + + @retval EFI_SUCCESS The SetVariable check result was success. + @retval EFI_INVALID_PARAMETER The data buffer is not a Null-terminated ASCII string. + +**/ +EFI_STATUS +EFIAPI +InternalVarCheckAsciiString ( + IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery, + IN UINTN DataSize, + IN VOID *Data + ) +{ + CHAR8 *String; + UINTN Index; + + String = (CHAR8 *)Data; + if (String[DataSize - 1] == '\0') { + return EFI_SUCCESS; + } else { + for (Index = 1; Index < DataSize && (String[DataSize - 1 - Index] != '\0'); Index++) { + } + + if (Index == DataSize) { + return EFI_INVALID_PARAMETER; + } + } + + return EFI_SUCCESS; +} + +/** + Internal check for size array. + + @param[in] VariablePropery Pointer to variable property. + @param[in] DataSize Data size. + @param[in] Data Pointer to data buffer. + + @retval EFI_SUCCESS The SetVariable check result was success. + @retval EFI_INVALID_PARAMETER The DataSize is not size array. + +**/ +EFI_STATUS +EFIAPI +InternalVarCheckSizeArray ( + IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery, + IN UINTN DataSize, + IN VOID *Data + ) +{ + if ((DataSize % VariablePropery->MinSize) != 0) { + return EFI_INVALID_PARAMETER; + } + + return EFI_SUCCESS; +} + +// +// To prevent name collisions with possible future globally defined variables, +// other internal firmware data variables that are not defined here must be +// saved with a unique VendorGuid other than EFI_GLOBAL_VARIABLE or +// any other GUID defined by the UEFI Specification. Implementations must +// only permit the creation of variables with a UEFI Specification-defined +// VendorGuid when these variables are documented in the UEFI Specification. +// +UEFI_DEFINED_VARIABLE_ENTRY mGlobalVariableList[] = { + { + EFI_LANG_CODES_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_BS_RT, + 1, + MAX_UINTN + }, + InternalVarCheckAsciiString + }, + { + EFI_LANG_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT, + 1, + MAX_UINTN + }, + InternalVarCheckAsciiString + }, + { + EFI_TIME_OUT_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT, + sizeof (UINT16), + sizeof (UINT16) + }, + NULL + }, + { + EFI_PLATFORM_LANG_CODES_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_BS_RT, + 1, + MAX_UINTN + }, + InternalVarCheckAsciiString + }, + { + EFI_PLATFORM_LANG_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT, + 1, + MAX_UINTN + }, + InternalVarCheckAsciiString + }, + { + EFI_CON_IN_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT, + sizeof (EFI_DEVICE_PATH_PROTOCOL), + MAX_UINTN + }, + InternalVarCheckDevicePath + }, + { + EFI_CON_OUT_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT, + sizeof (EFI_DEVICE_PATH_PROTOCOL), + MAX_UINTN + }, + InternalVarCheckDevicePath + }, + { + EFI_ERR_OUT_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT, + sizeof (EFI_DEVICE_PATH_PROTOCOL), + MAX_UINTN + }, + InternalVarCheckDevicePath + }, + { + EFI_CON_IN_DEV_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_BS_RT, + sizeof (EFI_DEVICE_PATH_PROTOCOL), + MAX_UINTN + }, + InternalVarCheckDevicePath + }, + { + EFI_CON_OUT_DEV_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_BS_RT, + sizeof (EFI_DEVICE_PATH_PROTOCOL), + MAX_UINTN + }, + InternalVarCheckDevicePath + }, + { + EFI_ERR_OUT_DEV_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_BS_RT, + sizeof (EFI_DEVICE_PATH_PROTOCOL), + MAX_UINTN + }, + InternalVarCheckDevicePath + }, + { + EFI_BOOT_ORDER_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT, + sizeof (UINT16), + MAX_UINTN + }, + InternalVarCheckSizeArray + }, + { + EFI_BOOT_NEXT_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT, + sizeof (UINT16), + sizeof (UINT16) + }, + NULL + }, + { + EFI_BOOT_CURRENT_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_BS_RT, + sizeof (UINT16), + sizeof (UINT16) + }, + NULL + }, + { + EFI_BOOT_OPTION_SUPPORT_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_BS_RT, + sizeof (UINT32), + sizeof (UINT32) + }, + NULL + }, + { + EFI_DRIVER_ORDER_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT, + sizeof (UINT16), + MAX_UINTN + }, + InternalVarCheckSizeArray + }, + { + EFI_SYS_PREP_ORDER_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT, + sizeof (UINT16), + MAX_UINTN + }, + InternalVarCheckSizeArray + }, + { + EFI_HW_ERR_REC_SUPPORT_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT, + sizeof (UINT16), + sizeof (UINT16) + }, + NULL + }, + { + EFI_SETUP_MODE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY, + VARIABLE_ATTRIBUTE_BS_RT, + sizeof (UINT8), + sizeof (UINT8) + }, + NULL + }, + { + EFI_KEY_EXCHANGE_KEY_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT_AT, + 1, + MAX_UINTN + }, + NULL + }, + { + EFI_PLATFORM_KEY_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT_AT, + 1, + MAX_UINTN + }, + NULL + }, + { + EFI_SIGNATURE_SUPPORT_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY, + VARIABLE_ATTRIBUTE_BS_RT, + sizeof (EFI_GUID), + MAX_UINTN + }, + InternalVarCheckSizeArray + }, + { + EFI_SECURE_BOOT_MODE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY, + VARIABLE_ATTRIBUTE_BS_RT, + sizeof (UINT8), + sizeof (UINT8) + }, + NULL + }, + { + EFI_KEK_DEFAULT_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY, + VARIABLE_ATTRIBUTE_BS_RT, + 1, + MAX_UINTN + }, + NULL + }, + { + EFI_PK_DEFAULT_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY, + VARIABLE_ATTRIBUTE_BS_RT, + 1, + MAX_UINTN + }, + NULL + }, + { + EFI_DB_DEFAULT_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY, + VARIABLE_ATTRIBUTE_BS_RT, + 1, + MAX_UINTN + }, + NULL + }, + { + EFI_DBX_DEFAULT_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY, + VARIABLE_ATTRIBUTE_BS_RT, + 1, + MAX_UINTN + }, + NULL + }, + { + EFI_DBT_DEFAULT_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY, + VARIABLE_ATTRIBUTE_BS_RT, + 1, + MAX_UINTN + }, + NULL + }, + { + EFI_OS_INDICATIONS_SUPPORT_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_BS_RT, + sizeof (UINT64), + sizeof (UINT64) + }, + NULL + }, + { + EFI_OS_INDICATIONS_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT, + sizeof (UINT64), + sizeof (UINT64) + }, + NULL + }, + { + EFI_VENDOR_KEYS_VARIABLE_NAME, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY, + VARIABLE_ATTRIBUTE_BS_RT, + sizeof (UINT8), + sizeof (UINT8) + }, + NULL + }, +}; + +UEFI_DEFINED_VARIABLE_ENTRY mGlobalVariableList2[] = { + { + L"Boot####", + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT, + sizeof (UINT32) + sizeof (UINT16), + MAX_UINTN + }, + InternalVarCheckLoadOption + }, + { + L"Driver####", + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT, + sizeof (UINT32) + sizeof (UINT16), + MAX_UINTN + }, + InternalVarCheckLoadOption + }, + { + L"SysPrep####", + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT, + sizeof (UINT32) + sizeof (UINT16), + MAX_UINTN + }, + InternalVarCheckLoadOption + }, + { + L"Key####", + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT, + sizeof (EFI_KEY_OPTION), + sizeof (EFI_KEY_OPTION) + 3 * sizeof (EFI_INPUT_KEY) + }, + InternalVarCheckKeyOption + }, + { + L"PlatformRecovery####", + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_BS_RT, + sizeof (UINT32) + sizeof (UINT16), + MAX_UINTN + }, + InternalVarCheckLoadOption + }, +}; + +// +// EFI_IMAGE_SECURITY_DATABASE_GUID +// +UEFI_DEFINED_VARIABLE_ENTRY mImageSecurityVariableList[] = { + { + EFI_IMAGE_SECURITY_DATABASE, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT_AT, + 1, + MAX_UINTN + }, + NULL + }, + { + EFI_IMAGE_SECURITY_DATABASE1, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT_AT, + 1, + MAX_UINTN + }, + NULL + }, + { + EFI_IMAGE_SECURITY_DATABASE2, + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT_AT, + 1, + MAX_UINTN + }, + NULL + }, +}; + +// +// EFI_HARDWARE_ERROR_VARIABLE +// +UEFI_DEFINED_VARIABLE_ENTRY mHwErrRecVariable = { + L"HwErrRec####", + { + VAR_CHECK_VARIABLE_PROPERTY_REVISION, + 0, + VARIABLE_ATTRIBUTE_NV_BS_RT_HR, + 1, + MAX_UINTN + }, + NULL +}; + +EFI_GUID *mUefiDefinedGuid[] = { + &gEfiGlobalVariableGuid, + &gEfiImageSecurityDatabaseGuid, + &gEfiHardwareErrorVariableGuid +}; + +/** + Check if a Unicode character is an upper case hexadecimal character. + + This function checks if a Unicode character is an upper case + hexadecimal character. The valid upper case hexadecimal character is + L'0' to L'9', or L'A' to L'F'. + + + @param[in] Char The character to check against. + + @retval TRUE If the Char is an upper case hexadecmial character. + @retval FALSE If the Char is not an upper case hexadecmial character. + +**/ +BOOLEAN +EFIAPI +VarCheckUefiIsHexaDecimalDigitCharacter ( + IN CHAR16 Char + ) +{ + return (BOOLEAN)((Char >= L'0' && Char <= L'9') || (Char >= L'A' && Char <= L'F')); +} + +/** + + This code checks if variable is hardware error record variable or not. + + According to UEFI spec, hardware error record variable should use the EFI_HARDWARE_ERROR_VARIABLE VendorGuid + and have the L"HwErrRec####" name convention, #### is a printed hex value and no 0x or h is included in the hex value. + + @param[in] VariableName Pointer to variable name. + @param[in] VendorGuid Variable Vendor Guid. + + @retval TRUE Variable is hardware error record variable. + @retval FALSE Variable is not hardware error record variable. + +**/ +BOOLEAN +EFIAPI +IsHwErrRecVariable ( + IN CHAR16 *VariableName, + IN EFI_GUID *VendorGuid + ) +{ + if (!CompareGuid (VendorGuid, &gEfiHardwareErrorVariableGuid) || + (StrLen (VariableName) != StrLen (L"HwErrRec####")) || + (StrnCmp (VariableName, L"HwErrRec", StrLen (L"HwErrRec")) != 0) || + !VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[0x8]) || + !VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[0x9]) || + !VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[0xA]) || + !VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[0xB])) + { + return FALSE; + } + + return TRUE; +} + +/** + Get UEFI defined var check function. + + @param[in] VariableName Pointer to variable name. + @param[in] VendorGuid Pointer to variable vendor GUID. + @param[out] VariableProperty Pointer to variable property. + + @return Internal var check function, NULL if no specific check function. + +**/ +INTERNAL_VAR_CHECK_FUNCTION +GetUefiDefinedVarCheckFunction ( + IN CHAR16 *VariableName, + IN EFI_GUID *VendorGuid, + OUT VAR_CHECK_VARIABLE_PROPERTY **VariableProperty + ) +{ + UINTN Index; + UINTN NameLength; + + if (CompareGuid (VendorGuid, &gEfiGlobalVariableGuid)) { + // + // Try list 1, exactly match. + // + for (Index = 0; Index < sizeof (mGlobalVariableList)/sizeof (mGlobalVariableList[0]); Index++) { + if (StrCmp (mGlobalVariableList[Index].Name, VariableName) == 0) { + *VariableProperty = &(mGlobalVariableList[Index].VariableProperty); + return mGlobalVariableList[Index].CheckFunction; + } + } + + // + // Try list 2. + // + NameLength = StrLen (VariableName) - 4; + for (Index = 0; Index < sizeof (mGlobalVariableList2)/sizeof (mGlobalVariableList2[0]); Index++) { + if ((StrLen (VariableName) == StrLen (mGlobalVariableList2[Index].Name)) && + (StrnCmp (VariableName, mGlobalVariableList2[Index].Name, NameLength) == 0) && + VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[NameLength]) && + VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[NameLength + 1]) && + VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[NameLength + 2]) && + VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[NameLength + 3])) + { + *VariableProperty = &(mGlobalVariableList2[Index].VariableProperty); + return mGlobalVariableList2[Index].CheckFunction; + } + } + } + + return NULL; +} + +/** + SetVariable check handler UEFI defined. + + @param[in] VariableName Name of Variable to set. + @param[in] VendorGuid Variable vendor GUID. + @param[in] Attributes Attribute value of the variable. + @param[in] DataSize Size of Data to set. + @param[in] Data Data pointer. + + @retval EFI_SUCCESS The SetVariable check result was success. + @retval EFI_INVALID_PARAMETER An invalid combination of attribute bits, name, GUID, + DataSize and Data value was supplied. + @retval EFI_WRITE_PROTECTED The variable in question is read-only. + +**/ +EFI_STATUS +EFIAPI +SetVariableCheckHandlerUefiDefined ( + IN CHAR16 *VariableName, + IN EFI_GUID *VendorGuid, + IN UINT32 Attributes, + IN UINTN DataSize, + IN VOID *Data + ) +{ + EFI_STATUS Status; + UINTN Index; + VAR_CHECK_VARIABLE_PROPERTY Property; + VAR_CHECK_VARIABLE_PROPERTY *VarCheckProperty; + INTERNAL_VAR_CHECK_FUNCTION VarCheckFunction; + + if ((((Attributes & EFI_VARIABLE_APPEND_WRITE) == 0) && (DataSize == 0)) || (Attributes == 0)) { + // + // Do not check delete variable. + // + return EFI_SUCCESS; + } + + if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) { + if (!IsHwErrRecVariable (VariableName, VendorGuid)) { + return EFI_INVALID_PARAMETER; + } + } + + for (Index = 0; Index < sizeof (mUefiDefinedGuid)/sizeof (mUefiDefinedGuid[0]); Index++) { + if (CompareGuid (VendorGuid, mUefiDefinedGuid[Index])) { + if (VarCheckLibVariablePropertyGet (VariableName, VendorGuid, &Property) == EFI_NOT_FOUND) { + // + // To prevent name collisions with possible future globally defined variables, + // other internal firmware data variables that are not defined here must be + // saved with a unique VendorGuid other than EFI_GLOBAL_VARIABLE or + // any other GUID defined by the UEFI Specification. Implementations must + // only permit the creation of variables with a UEFI Specification-defined + // VendorGuid when these variables are documented in the UEFI Specification. + // + DEBUG ((DEBUG_INFO, "UEFI Variable Check fail %r - %s not in %g namespace\n", EFI_INVALID_PARAMETER, VariableName, VendorGuid)); + return EFI_INVALID_PARAMETER; + } + } + } + + if (DataSize == 0) { + return EFI_SUCCESS; + } + + VarCheckProperty = NULL; + VarCheckFunction = GetUefiDefinedVarCheckFunction (VariableName, VendorGuid, &VarCheckProperty); + if (VarCheckFunction != NULL) { + Status = VarCheckFunction ( + VarCheckProperty, + DataSize, + Data + ); + if (EFI_ERROR (Status)) { + DEBUG ((DEBUG_INFO, "UEFI Variable Check function fail %r - %g:%s\n", Status, VendorGuid, VariableName)); + return Status; + } + } + + return EFI_SUCCESS; +} + +/** + Variable property set for UEFI defined variables. + +**/ +VOID +VariablePropertySetUefiDefined ( + VOID + ) +{ + UINTN Index; + + // + // EFI_GLOBAL_VARIABLE + // + for (Index = 0; Index < sizeof (mGlobalVariableList)/sizeof (mGlobalVariableList[0]); Index++) { + VarCheckLibVariablePropertySet ( + mGlobalVariableList[Index].Name, + &gEfiGlobalVariableGuid, + &mGlobalVariableList[Index].VariableProperty + ); + } + + for (Index = 0; Index < sizeof (mGlobalVariableList2)/sizeof (mGlobalVariableList2[0]); Index++) { + VarCheckLibVariablePropertySet ( + mGlobalVariableList2[Index].Name, + &gEfiGlobalVariableGuid, + &mGlobalVariableList2[Index].VariableProperty + ); + } + + // + // EFI_IMAGE_SECURITY_DATABASE_GUID + // + for (Index = 0; Index < sizeof (mImageSecurityVariableList)/sizeof (mImageSecurityVariableList[0]); Index++) { + VarCheckLibVariablePropertySet ( + mImageSecurityVariableList[Index].Name, + &gEfiImageSecurityDatabaseGuid, + &mImageSecurityVariableList[Index].VariableProperty + ); + } + + // + // EFI_HARDWARE_ERROR_VARIABLE + // + VarCheckLibVariablePropertySet ( + mHwErrRecVariable.Name, + &gEfiHardwareErrorVariableGuid, + &mHwErrRecVariable.VariableProperty + ); +} + +/** + Constructor function of VarCheckUefiLib to set property and + register SetVariable check handler for UEFI defined variables. + + @retval EFI_SUCCESS The constructor executed correctly. + +**/ +RETURN_STATUS +EFIAPI +VarCheckUefiLibNullClassConstructor ( + VOID + ) +{ + VariablePropertySetUefiDefined (); + VarCheckLibRegisterSetVariableCheckHandler (SetVariableCheckHandlerUefiDefined); + + return RETURN_SUCCESS; +} |