diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/CryptoPkg/Library/OpensslLib/rand_pool_noise_tsc.c | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/CryptoPkg/Library/OpensslLib/rand_pool_noise_tsc.c')
| -rw-r--r-- | roms/edk2/CryptoPkg/Library/OpensslLib/rand_pool_noise_tsc.c | 43 |
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;
+}
|