247 lines
8.1 KiB
Diff
247 lines
8.1 KiB
Diff
From 660ffc1753c84e89281d54059c0cb73eef7200d0 Mon Sep 17 00:00:00 2001
|
|
From: Jon Maloy <jmaloy@redhat.com>
|
|
Date: Tue, 25 Jun 2024 22:27:16 -0400
|
|
Subject: [PATCH 09/31] SecurityPkg/RngDxe: Add AArch64 RawAlgorithm support
|
|
through ArmTrngLib
|
|
|
|
RH-Author: Jon Maloy <jmaloy@redhat.com>
|
|
RH-MergeRequest: 77: UINT32 overflow in S3 ResumeCount and Pixiefail fixes
|
|
RH-Jira: RHEL-21854 RHEL-21856 RHEL-40099
|
|
RH-Acked-by: Gerd Hoffmann <None>
|
|
RH-Commit: [9/31] 34f5db557b893a686c382a09ceacda728dbd4ad9
|
|
|
|
JIRA: https://issues.redhat.com/browse/RHEL-21856
|
|
CVE: CVE-2022-45237
|
|
Upstream: Merged
|
|
|
|
commit 863fe9e191fb3d90c3283062183692c04cd71975
|
|
Author: Sami Mujawar <sami.mujawar@arm.com>
|
|
Date: Fri Oct 28 17:32:55 2022 +0200
|
|
|
|
SecurityPkg/RngDxe: Add AArch64 RawAlgorithm support through ArmTrngLib
|
|
|
|
Bugzilla: 3668 (https://bugzilla.tianocore.org/show_bug.cgi?id=3668)
|
|
|
|
RawAlgorithm is used to provide access to entropy that is suitable
|
|
for cryptographic applications. Therefore, add RawAlgorithm support
|
|
that provides access to entropy using the ArmTrngLib.
|
|
|
|
Also remove unused UefiBootServicesTableLib library inclusion
|
|
and Status variable.
|
|
|
|
Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
|
|
Acked-by: Jiewen Yao <jiewen.yao@intel.com>
|
|
|
|
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
|
|
---
|
|
.../RngDxe/AArch64/RngDxe.c | 28 ++++++--
|
|
.../RandomNumberGenerator/RngDxe/ArmTrng.c | 71 +++++++++++++++++++
|
|
.../RandomNumberGenerator/RngDxe/RngDxe.inf | 5 ++
|
|
SecurityPkg/SecurityPkg.dsc | 4 ++
|
|
4 files changed, 104 insertions(+), 4 deletions(-)
|
|
create mode 100644 SecurityPkg/RandomNumberGenerator/RngDxe/ArmTrng.c
|
|
|
|
diff --git a/SecurityPkg/RandomNumberGenerator/RngDxe/AArch64/RngDxe.c b/SecurityPkg/RandomNumberGenerator/RngDxe/AArch64/RngDxe.c
|
|
index c9d66d9777..c0b0d28d48 100644
|
|
--- a/SecurityPkg/RandomNumberGenerator/RngDxe/AArch64/RngDxe.c
|
|
+++ b/SecurityPkg/RandomNumberGenerator/RngDxe/AArch64/RngDxe.c
|
|
@@ -1,11 +1,13 @@
|
|
/** @file
|
|
RNG Driver to produce the UEFI Random Number Generator protocol.
|
|
|
|
- The driver will use the RNDR instruction to produce random numbers.
|
|
+ The driver can use RNDR instruction (through the RngLib and if FEAT_RNG is
|
|
+ present) to produce random numbers. It also uses the Arm FW-TRNG interface
|
|
+ to implement EFI_RNG_ALGORITHM_RAW.
|
|
|
|
RNG Algorithms defined in UEFI 2.4:
|
|
- EFI_RNG_ALGORITHM_SP800_90_CTR_256_GUID
|
|
- - EFI_RNG_ALGORITHM_RAW - Unsupported
|
|
+ - EFI_RNG_ALGORITHM_RAW
|
|
- EFI_RNG_ALGORITHM_SP800_90_HMAC_256_GUID
|
|
- EFI_RNG_ALGORITHM_SP800_90_HASH_256_GUID
|
|
- EFI_RNG_ALGORITHM_X9_31_3DES_GUID - Unsupported
|
|
@@ -26,12 +28,14 @@
|
|
#include <Library/MemoryAllocationLib.h>
|
|
#include <Library/UefiBootServicesTableLib.h>
|
|
#include <Library/RngLib.h>
|
|
+#include <Library/DebugLib.h>
|
|
+#include <Library/ArmTrngLib.h>
|
|
#include <Protocol/Rng.h>
|
|
|
|
#include "RngDxeInternals.h"
|
|
|
|
// Maximum number of Rng algorithms.
|
|
-#define RNG_AVAILABLE_ALGO_MAX 1
|
|
+#define RNG_AVAILABLE_ALGO_MAX 2
|
|
|
|
/** Allocate and initialize mAvailableAlgoArray with the available
|
|
Rng algorithms. Also update mAvailableAlgoArrayCount.
|
|
@@ -46,8 +50,9 @@ GetAvailableAlgorithms (
|
|
)
|
|
{
|
|
UINT64 DummyRand;
|
|
+ UINT16 MajorRevision;
|
|
+ UINT16 MinorRevision;
|
|
|
|
- // Allocate RNG_AVAILABLE_ALGO_MAX entries to avoid evaluating
|
|
// Rng algorithms 2 times, one for the allocation, one to populate.
|
|
mAvailableAlgoArray = AllocateZeroPool (RNG_AVAILABLE_ALGO_MAX);
|
|
if (mAvailableAlgoArray == NULL) {
|
|
@@ -64,6 +69,16 @@ GetAvailableAlgorithms (
|
|
mAvailableAlgoArrayCount++;
|
|
}
|
|
|
|
+ // Raw algorithm (Trng)
|
|
+ if (!EFI_ERROR (GetArmTrngVersion (&MajorRevision, &MinorRevision))) {
|
|
+ CopyMem (
|
|
+ &mAvailableAlgoArray[mAvailableAlgoArrayCount],
|
|
+ &gEfiRngAlgorithmRaw,
|
|
+ sizeof (EFI_RNG_ALGORITHM)
|
|
+ );
|
|
+ mAvailableAlgoArrayCount++;
|
|
+ }
|
|
+
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
@@ -141,6 +156,11 @@ FoundAlgo:
|
|
return Status;
|
|
}
|
|
|
|
+ // Raw algorithm (Trng)
|
|
+ if (CompareGuid (RNGAlgorithm, &gEfiRngAlgorithmRaw)) {
|
|
+ return GenerateEntropy (RNGValueLength, RNGValue);
|
|
+ }
|
|
+
|
|
//
|
|
// Other algorithms are unsupported by this driver.
|
|
//
|
|
diff --git a/SecurityPkg/RandomNumberGenerator/RngDxe/ArmTrng.c b/SecurityPkg/RandomNumberGenerator/RngDxe/ArmTrng.c
|
|
new file mode 100644
|
|
index 0000000000..ffe557b692
|
|
--- /dev/null
|
|
+++ b/SecurityPkg/RandomNumberGenerator/RngDxe/ArmTrng.c
|
|
@@ -0,0 +1,71 @@
|
|
+/** @file
|
|
+ RNG Driver to produce the UEFI Random Number Generator protocol.
|
|
+
|
|
+ The driver implements the EFI_RNG_ALGORITHM_RAW using the FW-TRNG
|
|
+ interface to provide entropy.
|
|
+
|
|
+ Copyright (c) 2021 - 2022, Arm Limited. All rights reserved.<BR>
|
|
+
|
|
+ SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
+
|
|
+**/
|
|
+
|
|
+#include <Library/BaseLib.h>
|
|
+#include <Library/BaseMemoryLib.h>
|
|
+#include <Library/DebugLib.h>
|
|
+#include <Library/ArmTrngLib.h>
|
|
+#include <Protocol/Rng.h>
|
|
+
|
|
+#include "RngDxeInternals.h"
|
|
+
|
|
+/**
|
|
+ Generate high-quality entropy source using a TRNG or through RDRAND.
|
|
+
|
|
+ @param[in] Length Size of the buffer, in bytes, to fill with.
|
|
+ @param[out] Entropy Pointer to the buffer to store the entropy data.
|
|
+
|
|
+ @retval RETURN_SUCCESS The function completed successfully.
|
|
+ @retval RETURN_INVALID_PARAMETER Invalid parameter.
|
|
+ @retval RETURN_UNSUPPORTED Function not implemented.
|
|
+ @retval RETURN_BAD_BUFFER_SIZE Buffer size is too small.
|
|
+ @retval RETURN_NOT_READY No Entropy available.
|
|
+**/
|
|
+EFI_STATUS
|
|
+EFIAPI
|
|
+GenerateEntropy (
|
|
+ IN UINTN Length,
|
|
+ OUT UINT8 *Entropy
|
|
+ )
|
|
+{
|
|
+ EFI_STATUS Status;
|
|
+ UINTN CollectedEntropyBits;
|
|
+ UINTN RequiredEntropyBits;
|
|
+ UINTN EntropyBits;
|
|
+ UINTN Index;
|
|
+ UINTN MaxBits;
|
|
+
|
|
+ ZeroMem (Entropy, Length);
|
|
+
|
|
+ RequiredEntropyBits = (Length << 3);
|
|
+ Index = 0;
|
|
+ CollectedEntropyBits = 0;
|
|
+ MaxBits = GetArmTrngMaxSupportedEntropyBits ();
|
|
+ while (CollectedEntropyBits < RequiredEntropyBits) {
|
|
+ EntropyBits = MIN ((RequiredEntropyBits - CollectedEntropyBits), MaxBits);
|
|
+ Status = GetArmTrngEntropy (
|
|
+ EntropyBits,
|
|
+ (Length - Index),
|
|
+ &Entropy[Index]
|
|
+ );
|
|
+ if (EFI_ERROR (Status)) {
|
|
+ // Discard the collected bits.
|
|
+ ZeroMem (Entropy, Length);
|
|
+ return Status;
|
|
+ }
|
|
+
|
|
+ CollectedEntropyBits += EntropyBits;
|
|
+ Index += (EntropyBits >> 3);
|
|
+ } // while
|
|
+
|
|
+ return Status;
|
|
+}
|
|
diff --git a/SecurityPkg/RandomNumberGenerator/RngDxe/RngDxe.inf b/SecurityPkg/RandomNumberGenerator/RngDxe/RngDxe.inf
|
|
index 1985dfbb46..e0e767cbf3 100644
|
|
--- a/SecurityPkg/RandomNumberGenerator/RngDxe/RngDxe.inf
|
|
+++ b/SecurityPkg/RandomNumberGenerator/RngDxe/RngDxe.inf
|
|
@@ -43,8 +43,10 @@
|
|
|
|
[Sources.AARCH64]
|
|
AArch64/RngDxe.c
|
|
+ ArmTrng.c
|
|
|
|
[Packages]
|
|
+ MdeModulePkg/MdeModulePkg.dec
|
|
MdePkg/MdePkg.dec
|
|
SecurityPkg/SecurityPkg.dec
|
|
|
|
@@ -57,6 +59,9 @@
|
|
TimerLib
|
|
RngLib
|
|
|
|
+[LibraryClasses.AARCH64]
|
|
+ ArmTrngLib
|
|
+
|
|
[Guids]
|
|
gEfiRngAlgorithmSp80090Hash256Guid ## SOMETIMES_PRODUCES ## GUID # Unique ID of the algorithm for RNG
|
|
gEfiRngAlgorithmSp80090Hmac256Guid ## SOMETIMES_PRODUCES ## GUID # Unique ID of the algorithm for RNG
|
|
diff --git a/SecurityPkg/SecurityPkg.dsc b/SecurityPkg/SecurityPkg.dsc
|
|
index 73a93c2285..9f58cc2333 100644
|
|
--- a/SecurityPkg/SecurityPkg.dsc
|
|
+++ b/SecurityPkg/SecurityPkg.dsc
|
|
@@ -3,6 +3,8 @@
|
|
#
|
|
# Copyright (c) 2009 - 2021, Intel Corporation. All rights reserved.<BR>
|
|
# (C) Copyright 2015-2020 Hewlett Packard Enterprise Development LP<BR>
|
|
+# Copyright (c) 2022, Loongson Technology Corporation Limited. All rights reserved.<BR>
|
|
+# Copyright (c) 2021 - 2022, Arm Limited. All rights reserved.<BR>
|
|
# SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
#
|
|
##
|
|
@@ -86,6 +88,8 @@
|
|
|
|
ArmSoftFloatLib|ArmPkg/Library/ArmSoftFloatLib/ArmSoftFloatLib.inf
|
|
|
|
+ ArmTrngLib|MdePkg/Library/BaseArmTrngLibNull/BaseArmTrngLibNull.inf
|
|
+
|
|
[LibraryClasses.ARM]
|
|
RngLib|MdePkg/Library/BaseRngLibTimerLib/BaseRngLibTimerLib.inf
|
|
|
|
--
|
|
2.39.3
|
|
|