1 files changed, 43 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/CryptoPkg/Library/BaseCryptLib/Kdf/CryptHkdfNull.c b/src/VBox/Devices/EFI/Firmware/CryptoPkg/Library/BaseCryptLib/Kdf/CryptHkdfNull.c
new file mode 100644
index 00000000..64792476
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/CryptoPkg/Library/BaseCryptLib/Kdf/CryptHkdfNull.c
@@ -0,0 +1,43 @@
+/** @file
+  HMAC-SHA256 KDF Wrapper Implementation which does not provide real capabilities.
+
+Copyright (c) 2018 - 2019, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/BaseCryptLib.h>
+#include <Library/DebugLib.h>
+
+/**
+  Derive key data using HMAC-SHA256 based KDF.
+
+  @param[in]   Key              Pointer to the user-supplied key.
+  @param[in]   KeySize          Key size in bytes.
+  @param[in]   Salt             Pointer to the salt(non-secret) value.
+  @param[in]   SaltSize         Salt size in bytes.
+  @param[in]   Info             Pointer to the application specific info.
+  @param[in]   InfoSize         Info size in bytes.
+  @param[out]  Out              Pointer to buffer to receive hkdf value.
+  @param[in]   OutSize          Size of hkdf bytes to generate.
+
+  @retval TRUE   Hkdf generated successfully.
+  @retval FALSE  Hkdf generation failed.
+
+**/
+BOOLEAN
+EFIAPI
+HkdfSha256ExtractAndExpand (
+  IN   CONST UINT8  *Key,
+  IN   UINTN        KeySize,
+  IN   CONST UINT8  *Salt,
+  IN   UINTN        SaltSize,
+  IN   CONST UINT8  *Info,
+  IN   UINTN        InfoSize,
+  OUT  UINT8        *Out,
+  IN   UINTN        OutSize
+  )
+{
+  ASSERT (FALSE);
+  return FALSE;
+}