+/** @file\r
+ Null version of VariableKeyLib for build purpose. Don't use it in real product.\r
+\r
+Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>\r
+SPDX-License-Identifier: BSD-2-Clause-Patent\r
+\r
+**/\r
+#include <Library/DebugLib.h>\r
+#include <Library/VariableKeyLib.h>\r
+\r
+/**\r
+ Retrieves the key for integrity and/or confidentiality of variables.\r
+\r
+ @param[out] VariableKey A pointer to pointer for the variable key buffer.\r
+ @param[in,out] VariableKeySize The size in bytes of the variable key.\r
+\r
+ @retval EFI_SUCCESS The variable key was returned.\r
+ @retval EFI_DEVICE_ERROR An error occurred while attempting to get the variable key.\r
+ @retval EFI_ACCESS_DENIED The function was invoked after locking the key interface.\r
+ @retval EFI_UNSUPPORTED The variable key is not supported in the current boot configuration.\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+GetVariableKey (\r
+ OUT VOID **VariableKey,\r
+ IN OUT UINTN *VariableKeySize\r
+ )\r
+{\r
+ ASSERT (FALSE);\r
+ return EFI_UNSUPPORTED;\r
+}\r
+\r
+/**\r
+ Regenerates the variable key.\r
+\r
+ @retval EFI_SUCCESS The variable key was regenerated successfully.\r
+ @retval EFI_DEVICE_ERROR An error occurred while attempting to regenerate the key.\r
+ @retval EFI_ACCESS_DENIED The function was invoked after locking the key interface.\r
+ @retval EFI_UNSUPPORTED Key regeneration is not supported in the current boot configuration.\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+RegenerateVariableKey (\r
+ VOID\r
+ )\r
+{\r
+ ASSERT (FALSE);\r
+ return EFI_UNSUPPORTED;\r
+}\r
+\r
+/**\r
+ Locks the regenerate key interface.\r
+\r
+ @retval EFI_SUCCESS The key interface was locked successfully.\r
+ @retval EFI_UNSUPPORTED Locking the key interface is not supported in the current boot configuration.\r
+ @retval Others An error occurred while attempting to lock the key interface.\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+LockVariableKeyInterface (\r
+ VOID\r
+ )\r
+{\r
+ ASSERT (FALSE);\r
+ return EFI_UNSUPPORTED;\r
+}\r
+\r