1 files changed, 43 insertions, 0 deletions
diff --git a/roms/edk2/CryptoPkg/Library/OpensslLib/rand_pool_noise_tsc.c b/roms/edk2/CryptoPkg/Library/OpensslLib/rand_pool_noise_tsc.c
new file mode 100644
index 000000000..415810623
--- /dev/null
+++ b/roms/edk2/CryptoPkg/Library/OpensslLib/rand_pool_noise_tsc.c
@@ -0,0 +1,43 @@
+/** @file
+  Provide rand noise source.
+
+Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/TimerLib.h>
+
+/**
+  Get 64-bit noise source
+
+  @param[out] Rand         Buffer pointer to store 64-bit noise source
+
+  @retval TRUE             Get randomness successfully.
+  @retval FALSE            Failed to generate
+**/
+BOOLEAN
+EFIAPI
+GetRandomNoise64 (
+  OUT UINT64         *Rand
+  )
+{
+  UINT32 Index;
+  UINT32 *RandPtr;
+
+  if (NULL == Rand) {
+    return FALSE;
+  }
+
+  RandPtr = (UINT32 *)Rand;
+
+  for (Index = 0; Index < 2; Index ++) {
+    *RandPtr = (UINT32) ((AsmReadTsc ()) & 0xFF);
+    RandPtr++;
+    MicroSecondDelay (10);
+  }
+
+  return TRUE;
+}