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| author | Gerd Hoffmann <kraxel@redhat.com> | 2024-05-31 09:49:13 +0200 |
|---|---|---|
| committer | Ard Biesheuvel <workofard@gmail.com> | 2024-06-13 08:52:48 -0700 |
| commit | a61bc0accb8a76edba4f073fdc7bafc908df045d (patch) | |
| tree | 90e33f0afc58c8de56f43f0af6a64fa554fd5e5c /SecurityPkg | |
| parent | c3a8ca7b54a9fd17acdf16c6282a92cc989fa92a (diff) | |
| download | edk2-a61bc0accb8a76edba4f073fdc7bafc908df045d.zip edk2-a61bc0accb8a76edba4f073fdc7bafc908df045d.tar.gz edk2-a61bc0accb8a76edba4f073fdc7bafc908df045d.tar.bz2 | |
SecurityPkg/RngDxe: add rng test
Check whenever RngLib actually returns random numbers, only return
a non-zero number of Algorithms if that is the case.
This has the effect that RndDxe loads and installs EFI_RNG_PROTOCOL
only in case it can actually deliver random numbers.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'SecurityPkg')
| -rw-r--r-- | SecurityPkg/RandomNumberGenerator/RngDxe/Rand/RngDxe.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/SecurityPkg/RandomNumberGenerator/RngDxe/Rand/RngDxe.c b/SecurityPkg/RandomNumberGenerator/RngDxe/Rand/RngDxe.c index 5723ed6..8b0742b 100644 --- a/SecurityPkg/RandomNumberGenerator/RngDxe/Rand/RngDxe.c +++ b/SecurityPkg/RandomNumberGenerator/RngDxe/Rand/RngDxe.c @@ -23,6 +23,7 @@ #include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
+#include <Library/RngLib.h>
#include "RngDxeInternals.h"
@@ -43,7 +44,12 @@ GetAvailableAlgorithms ( VOID
)
{
- mAvailableAlgoArrayCount = RNG_ALGORITHM_COUNT;
+ UINT64 RngTest;
+
+ if (GetRandomNumber64 (&RngTest)) {
+ mAvailableAlgoArrayCount = RNG_ALGORITHM_COUNT;
+ }
+
return EFI_SUCCESS;
}
|