Re: [edk2-devel] [PATCH v3 1/3] CryptoPkg: OpensslLib: Use RngLib to generate entropy in rand_pool

["Yao, Jiewen" <jiewen.yao@intel.com>]

Hi Matthew Carlson
Do you have any thought on the feedback below?

Do you make any update in your patch V6?



> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Yao, Jiewen
> Sent: Saturday, August 1, 2020 8:26 AM
> To: matthewfcarlson@gmail.com; devel@edk2.groups.io
> Cc: Wang, Jian J <jian.j.wang@intel.com>; Lu, XiaoyuX <xiaoyux.lu@intel.com>
> Subject: Re: [edk2-devel] [PATCH v3 1/3] CryptoPkg: OpensslLib: Use RngLib to
> generate entropy in rand_pool
> 
> Hi
> I have read https://bugzilla.tianocore.org/show_bug.cgi?id=1871
> I would like to give R-B, because the code matches what described in Bugzilla.
> 
> Before that, I would like double confirm on the randomness requirement.
> According to
> https://software.intel.com/content/www/us/en/develop/blogs/the-difference-
> between-rdrand-and-rdseed.html, the RDSEED is a "Non-deterministic random
> bit generator", while RDRAND is a "Cryptographically secure pseudorandom
> number generator"
> 
> Before this patch:
> rand_pool_acquire_entropy()-> RandGetSeed128()-
> >MicroSecondDelay()+RandGetBytes()->GetRandomNoise64()-
> >AsmReadTsc()+MicroSecondDelay().
> rand_pool_add_nonce_data()->GetPerformanceCounter()+RandGetBytes()
> It seems return TSC and TimerCounter.
> 
> After this patch:
> rand_pool_acquire_entropy()->RandGetBytes()->GetRandomNumber64()-
> >AsmRdRand64().
> rand_pool_add_nonce_data()->RandGetBytes()
> It becomes pseudorandom.
> 
> So the meaning of the function seems changed.
> I have not checked the randomness requirement for those two functions yet.
> But could anyone confirm that a pseudorandom value returned is OK?
> 
> Or should we use RDSEED for non-deterministic value?
> 
> Thank you
> Yao Jiewen
> 
> 
> > -----Original Message-----
> > From: matthewfcarlson@gmail.com <matthewfcarlson@gmail.com>
> > Sent: Saturday, August 1, 2020 4:27 AM
> > To: devel@edk2.groups.io
> > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Wang, Jian J
> <jian.j.wang@intel.com>;
> > Lu, XiaoyuX <xiaoyux.lu@intel.com>; Matthew Carlson
> > <matthewfcarlson@gmail.com>
> > Subject: [PATCH v3 1/3] CryptoPkg: OpensslLib: Use RngLib to generate
> entropy
> > in rand_pool
> >
> > From: Matthew Carlson <macarl@microsoft.com>
> >
> > Changes OpenSSL to no longer depend on TimerLib and instead use RngLib.
> > This allows platforms to decide for themsevles what sort of entropy source
> > they provide to OpenSSL and TlsLib.
> >
> > Cc: Jiewen Yao <jiewen.yao@intel.com>
> > Cc: Jian J Wang <jian.j.wang@intel.com>
> > Cc: Xiaoyu Lu <xiaoyux.lu@intel.com>
> > Signed-off-by: Matthew Carlson <matthewfcarlson@gmail.com>
> > ---
> >  CryptoPkg/Library/OpensslLib/rand_pool.c           | 203 ++------------------
> >  CryptoPkg/Library/OpensslLib/rand_pool_noise.c     |  29 ---
> >  CryptoPkg/Library/OpensslLib/rand_pool_noise_tsc.c |  43 -----
> >  CryptoPkg/CryptoPkg.dsc                            |   1 +
> >  CryptoPkg/Library/OpensslLib/OpensslLib.inf        |  15 +-
> >  CryptoPkg/Library/OpensslLib/OpensslLibCrypto.inf  |  15 +-
> >  CryptoPkg/Library/OpensslLib/rand_pool_noise.h     |  29 ---
> >  7 files changed, 22 insertions(+), 313 deletions(-)
> >
> > diff --git a/CryptoPkg/Library/OpensslLib/rand_pool.c
> > b/CryptoPkg/Library/OpensslLib/rand_pool.c
> > index 9e0179b03490..b3ff03b2aa13 100644
> > --- a/CryptoPkg/Library/OpensslLib/rand_pool.c
> > +++ b/CryptoPkg/Library/OpensslLib/rand_pool.c
> > @@ -11,53 +11,18 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
> >  #include <openssl/aes.h>
> >
> >
> >
> >  #include <Uefi.h>
> >
> > -#include <Library/TimerLib.h>
> >
> > -
> >
> > -#include "rand_pool_noise.h"
> >
> > -
> >
> > -/**
> >
> > -  Get some randomness from low-order bits of GetPerformanceCounter
> results.
> >
> > -  And combine them to the 64-bit value
> >
> > -
> >
> > -  @param[out] Rand    Buffer pointer to store the 64-bit random value.
> >
> > -
> >
> > -  @retval TRUE        Random number generated successfully.
> >
> > -  @retval FALSE       Failed to generate.
> >
> > -**/
> >
> > -STATIC
> >
> > -BOOLEAN
> >
> > -EFIAPI
> >
> > -GetRandNoise64FromPerformanceCounter(
> >
> > -  OUT UINT64      *Rand
> >
> > -  )
> >
> > -{
> >
> > -  UINT32 Index;
> >
> > -  UINT32 *RandPtr;
> >
> > -
> >
> > -  if (NULL == Rand) {
> >
> > -    return FALSE;
> >
> > -  }
> >
> > -
> >
> > -  RandPtr = (UINT32 *) Rand;
> >
> > -
> >
> > -  for (Index = 0; Index < 2; Index ++) {
> >
> > -    *RandPtr = (UINT32) (GetPerformanceCounter () & 0xFF);
> >
> > -    MicroSecondDelay (10);
> >
> > -    RandPtr++;
> >
> > -  }
> >
> > -
> >
> > -  return TRUE;
> >
> > -}
> >
> > +#include <Library/RngLib.h>
> >
> >
> >
> >  /**
> >
> >    Calls RandomNumber64 to fill
> >
> >    a buffer of arbitrary size with random bytes.
> >
> > +  This is a shim layer to RngLib.
> >
> >
> >
> >    @param[in]   Length        Size of the buffer, in bytes,  to fill with.
> >
> >    @param[out]  RandBuffer    Pointer to the buffer to store the random result.
> >
> >
> >
> > -  @retval EFI_SUCCESS        Random bytes generation succeeded.
> >
> > -  @retval EFI_NOT_READY      Failed to request random bytes.
> >
> > +  @retval True        Random bytes generation succeeded.
> >
> > +  @retval False       Failed to request random bytes.
> >
> >
> >
> >  **/
> >
> >  STATIC
> >
> > @@ -73,17 +38,17 @@ RandGetBytes (
> >
> >
> >    Ret = FALSE;
> >
> >
> >
> > +  if (RandBuffer == NULL) {
> >
> > +    DEBUG((DEBUG_ERROR, "[OPENSSL_RAND_POOL] NULL RandBuffer. No
> > random numbers are generated and your system is not secure\n"));
> >
> > +    ASSERT(FALSE); // Since we can't generate random numbers, we should
> > assert. Otherwise we will just blow up later.
> >
> > +    return Ret;
> >
> > +  }
> >
> > +
> >
> > +
> >
> >    while (Length > 0) {
> >
> > -    //
> >
> > -    // Get random noise from platform.
> >
> > -    // If it failed, fallback to PerformanceCounter
> >
> > -    // If you really care about security, you must override
> >
> > -    // GetRandomNoise64FromPlatform.
> >
> > -    //
> >
> > -    Ret = GetRandomNoise64 (&TempRand);
> >
> > -    if (Ret == FALSE) {
> >
> > -      Ret = GetRandNoise64FromPerformanceCounter (&TempRand);
> >
> > -    }
> >
> > +    // Use RngLib to get random number
> >
> > +    Ret = GetRandomNumber64(&TempRand);
> >
> > +
> >
> >      if (!Ret) {
> >
> >        return Ret;
> >
> >      }
> >
> > @@ -100,125 +65,6 @@ RandGetBytes (
> >    return Ret;
> >
> >  }
> >
> >
> >
> > -/**
> >
> > -  Creates a 128bit random value that is fully forward and backward prediction
> > resistant,
> >
> > -  suitable for seeding a NIST SP800-90 Compliant.
> >
> > -  This function takes multiple random numbers from PerformanceCounter to
> > ensure reseeding
> >
> > -  and performs AES-CBC-MAC over the data to compute the seed value.
> >
> > -
> >
> > -  @param[out]  SeedBuffer    Pointer to a 128bit buffer to store the random
> > seed.
> >
> > -
> >
> > -  @retval TRUE        Random seed generation succeeded.
> >
> > -  @retval FALSE      Failed to request random bytes.
> >
> > -
> >
> > -**/
> >
> > -STATIC
> >
> > -BOOLEAN
> >
> > -EFIAPI
> >
> > -RandGetSeed128 (
> >
> > -  OUT UINT8        *SeedBuffer
> >
> > -  )
> >
> > -{
> >
> > -  BOOLEAN     Ret;
> >
> > -  UINT8       RandByte[16];
> >
> > -  UINT8       Key[16];
> >
> > -  UINT8       Ffv[16];
> >
> > -  UINT8       Xored[16];
> >
> > -  UINT32      Index;
> >
> > -  UINT32      Index2;
> >
> > -  AES_KEY     AESKey;
> >
> > -
> >
> > -  //
> >
> > -  // Chose an arbitrary key and zero the feed_forward_value (FFV)
> >
> > -  //
> >
> > -  for (Index = 0; Index < 16; Index++) {
> >
> > -    Key[Index] = (UINT8) Index;
> >
> > -    Ffv[Index] = 0;
> >
> > -  }
> >
> > -
> >
> > -  AES_set_encrypt_key (Key, 16 * 8, &AESKey);
> >
> > -
> >
> > -  //
> >
> > -  // Perform CBC_MAC over 32 * 128 bit values, with 10us gaps between 128
> bit
> > value
> >
> > -  // The 10us gaps will ensure multiple reseeds within the system time with a
> > large
> >
> > -  // design margin.
> >
> > -  //
> >
> > -  for (Index = 0; Index < 32; Index++) {
> >
> > -    MicroSecondDelay (10);
> >
> > -    Ret = RandGetBytes (16, RandByte);
> >
> > -    if (!Ret) {
> >
> > -      return Ret;
> >
> > -    }
> >
> > -
> >
> > -    //
> >
> > -    // Perform XOR operations on two 128-bit value.
> >
> > -    //
> >
> > -    for (Index2 = 0; Index2 < 16; Index2++) {
> >
> > -      Xored[Index2] = RandByte[Index2] ^ Ffv[Index2];
> >
> > -    }
> >
> > -
> >
> > -    AES_encrypt (Xored, Ffv, &AESKey);
> >
> > -  }
> >
> > -
> >
> > -  for (Index = 0; Index < 16; Index++) {
> >
> > -    SeedBuffer[Index] = Ffv[Index];
> >
> > -  }
> >
> > -
> >
> > -  return Ret;
> >
> > -}
> >
> > -
> >
> > -/**
> >
> > -  Generate high-quality entropy source.
> >
> > -
> >
> > -  @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 EFI_SUCCESS        Entropy generation succeeded.
> >
> > -  @retval EFI_NOT_READY      Failed to request random data.
> >
> > -
> >
> > -**/
> >
> > -STATIC
> >
> > -BOOLEAN
> >
> > -EFIAPI
> >
> > -RandGenerateEntropy (
> >
> > -  IN UINTN         Length,
> >
> > -  OUT UINT8        *Entropy
> >
> > -  )
> >
> > -{
> >
> > -  BOOLEAN     Ret;
> >
> > -  UINTN       BlockCount;
> >
> > -  UINT8       Seed[16];
> >
> > -  UINT8       *Ptr;
> >
> > -
> >
> > -  BlockCount = Length / 16;
> >
> > -  Ptr        = (UINT8 *) Entropy;
> >
> > -
> >
> > -  //
> >
> > -  // Generate high-quality seed for DRBG Entropy
> >
> > -  //
> >
> > -  while (BlockCount > 0) {
> >
> > -    Ret = RandGetSeed128 (Seed);
> >
> > -    if (!Ret) {
> >
> > -      return Ret;
> >
> > -    }
> >
> > -    CopyMem (Ptr, Seed, 16);
> >
> > -
> >
> > -    BlockCount--;
> >
> > -    Ptr = Ptr + 16;
> >
> > -  }
> >
> > -
> >
> > -  //
> >
> > -  // Populate the remained data as request.
> >
> > -  //
> >
> > -  Ret = RandGetSeed128 (Seed);
> >
> > -  if (!Ret) {
> >
> > -    return Ret;
> >
> > -  }
> >
> > -  CopyMem (Ptr, Seed, (Length % 16));
> >
> > -
> >
> > -  return Ret;
> >
> > -}
> >
> > -
> >
> >  /*
> >
> >   * Add random bytes to the pool to acquire requested amount of entropy
> >
> >   *
> >
> > @@ -238,7 +84,7 @@ size_t rand_pool_acquire_entropy(RAND_POOL *pool)
> >      buffer = rand_pool_add_begin(pool, bytes_needed);
> >
> >
> >
> >      if (buffer != NULL) {
> >
> > -      Ret = RandGenerateEntropy(bytes_needed, buffer);
> >
> > +      Ret = RandGetBytes(bytes_needed, buffer);
> >
> >        if (FALSE == Ret) {
> >
> >          rand_pool_add_end(pool, 0, 0);
> >
> >        } else {
> >
> > @@ -257,13 +103,8 @@ size_t rand_pool_acquire_entropy(RAND_POOL
> *pool)
> >   */
> >
> >  int rand_pool_add_nonce_data(RAND_POOL *pool)
> >
> >  {
> >
> > -  struct {
> >
> > -    UINT64  Rand;
> >
> > -    UINT64  TimerValue;
> >
> > -  } data = { 0 };
> >
> > -
> >
> > -  RandGetBytes(8, (UINT8 *)&(data.Rand));
> >
> > -  data.TimerValue = GetPerformanceCounter();
> >
> > +  UINT8 data[16];
> >
> > +  RandGetBytes(sizeof(data), data);
> >
> >
> >
> >    return rand_pool_add(pool, (unsigned char*)&data, sizeof(data), 0);
> >
> >  }
> >
> > @@ -275,13 +116,8 @@ int rand_pool_add_nonce_data(RAND_POOL *pool)
> >   */
> >
> >  int rand_pool_add_additional_data(RAND_POOL *pool)
> >
> >  {
> >
> > -  struct {
> >
> > -    UINT64  Rand;
> >
> > -    UINT64  TimerValue;
> >
> > -  } data = { 0 };
> >
> > -
> >
> > -  RandGetBytes(8, (UINT8 *)&(data.Rand));
> >
> > -  data.TimerValue = GetPerformanceCounter();
> >
> > +  UINT8 data[16];
> >
> > +  RandGetBytes(sizeof(data), data);
> >
> >
> >
> >    return rand_pool_add(pool, (unsigned char*)&data, sizeof(data), 0);
> >
> >  }
> >
> > @@ -313,4 +149,3 @@ void rand_pool_cleanup(void)
> >  void rand_pool_keep_random_devices_open(int keep)
> >
> >  {
> >
> >  }
> >
> > -
> >
> > diff --git a/CryptoPkg/Library/OpensslLib/rand_pool_noise.c
> > b/CryptoPkg/Library/OpensslLib/rand_pool_noise.c
> > deleted file mode 100644
> > index 212834e27acc..000000000000
> > --- a/CryptoPkg/Library/OpensslLib/rand_pool_noise.c
> > +++ /dev/null
> > @@ -1,29 +0,0 @@
> > -/** @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>
> >
> > -
> >
> > -/**
> >
> > -  Get 64-bit noise source
> >
> > -
> >
> > -  @param[out] Rand         Buffer pointer to store 64-bit noise source
> >
> > -
> >
> > -  @retval FALSE            Failed to generate
> >
> > -**/
> >
> > -BOOLEAN
> >
> > -EFIAPI
> >
> > -GetRandomNoise64 (
> >
> > -  OUT UINT64         *Rand
> >
> > -  )
> >
> > -{
> >
> > -  //
> >
> > -  // Return FALSE will fallback to use PerformanceCounter to
> >
> > -  // generate noise.
> >
> > -  //
> >
> > -  return FALSE;
> >
> > -}
> >
> > diff --git a/CryptoPkg/Library/OpensslLib/rand_pool_noise_tsc.c
> > b/CryptoPkg/Library/OpensslLib/rand_pool_noise_tsc.c
> > deleted file mode 100644
> > index 4158106231fd..000000000000
> > --- a/CryptoPkg/Library/OpensslLib/rand_pool_noise_tsc.c
> > +++ /dev/null
> > @@ -1,43 +0,0 @@
> > -/** @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;
> >
> > -}
> >
> > diff --git a/CryptoPkg/CryptoPkg.dsc b/CryptoPkg/CryptoPkg.dsc
> > index 1af78468a19c..0490eeb7e22f 100644
> > --- a/CryptoPkg/CryptoPkg.dsc
> > +++ b/CryptoPkg/CryptoPkg.dsc
> > @@ -60,6 +60,7 @@
> >    BaseCryptLib|CryptoPkg/Library/BaseCryptLibNull/BaseCryptLibNull.inf
> >
> >    TlsLib|CryptoPkg/Library/TlsLibNull/TlsLibNull.inf
> >
> >    HashApiLib|CryptoPkg/Library/BaseHashApiLib/BaseHashApiLib.inf
> >
> > +  RngLib|MdePkg/Library/BaseRngLibNull/BaseRngLibNull.inf
> >
> >
> >
> >  [LibraryClasses.ARM, LibraryClasses.AARCH64]
> >
> >    #
> >
> > diff --git a/CryptoPkg/Library/OpensslLib/OpensslLib.inf
> > b/CryptoPkg/Library/OpensslLib/OpensslLib.inf
> > index dbbe5386a10c..4baad565564c 100644
> > --- a/CryptoPkg/Library/OpensslLib/OpensslLib.inf
> > +++ b/CryptoPkg/Library/OpensslLib/OpensslLib.inf
> > @@ -571,22 +571,9 @@
> >    $(OPENSSL_PATH)/ssl/statem/statem_local.h
> >
> >  # Autogenerated files list ends here
> >
> >    buildinf.h
> >
> > -  rand_pool_noise.h
> >
> >    ossl_store.c
> >
> >    rand_pool.c
> >
> >
> >
> > -[Sources.Ia32]
> >
> > -  rand_pool_noise_tsc.c
> >
> > -
> >
> > -[Sources.X64]
> >
> > -  rand_pool_noise_tsc.c
> >
> > -
> >
> > -[Sources.ARM]
> >
> > -  rand_pool_noise.c
> >
> > -
> >
> > -[Sources.AARCH64]
> >
> > -  rand_pool_noise.c
> >
> > -
> >
> >  [Packages]
> >
> >    MdePkg/MdePkg.dec
> >
> >    CryptoPkg/CryptoPkg.dec
> >
> > @@ -594,7 +581,7 @@
> >  [LibraryClasses]
> >
> >    BaseLib
> >
> >    DebugLib
> >
> > -  TimerLib
> >
> > +  RngLib
> >
> >    PrintLib
> >
> >
> >
> >  [LibraryClasses.ARM]
> >
> > diff --git a/CryptoPkg/Library/OpensslLib/OpensslLibCrypto.inf
> > b/CryptoPkg/Library/OpensslLib/OpensslLibCrypto.inf
> > index 616ccd9f62d1..3557711bd85a 100644
> > --- a/CryptoPkg/Library/OpensslLib/OpensslLibCrypto.inf
> > +++ b/CryptoPkg/Library/OpensslLib/OpensslLibCrypto.inf
> > @@ -520,22 +520,9 @@
> >    $(OPENSSL_PATH)/crypto/x509v3/v3_admis.h
> >
> >  # Autogenerated files list ends here
> >
> >    buildinf.h
> >
> > -  rand_pool_noise.h
> >
> >    ossl_store.c
> >
> >    rand_pool.c
> >
> >
> >
> > -[Sources.Ia32]
> >
> > -  rand_pool_noise_tsc.c
> >
> > -
> >
> > -[Sources.X64]
> >
> > -  rand_pool_noise_tsc.c
> >
> > -
> >
> > -[Sources.ARM]
> >
> > -  rand_pool_noise.c
> >
> > -
> >
> > -[Sources.AARCH64]
> >
> > -  rand_pool_noise.c
> >
> > -
> >
> >  [Packages]
> >
> >    MdePkg/MdePkg.dec
> >
> >    CryptoPkg/CryptoPkg.dec
> >
> > @@ -543,7 +530,7 @@
> >  [LibraryClasses]
> >
> >    BaseLib
> >
> >    DebugLib
> >
> > -  TimerLib
> >
> > +  RngLib
> >
> >    PrintLib
> >
> >
> >
> >  [LibraryClasses.ARM]
> >
> > diff --git a/CryptoPkg/Library/OpensslLib/rand_pool_noise.h
> > b/CryptoPkg/Library/OpensslLib/rand_pool_noise.h
> > deleted file mode 100644
> > index 75acc686a9f1..000000000000
> > --- a/CryptoPkg/Library/OpensslLib/rand_pool_noise.h
> > +++ /dev/null
> > @@ -1,29 +0,0 @@
> > -/** @file
> >
> > -  Provide rand noise source.
> >
> > -
> >
> > -Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
> >
> > -SPDX-License-Identifier: BSD-2-Clause-Patent
> >
> > -
> >
> > -**/
> >
> > -
> >
> > -#ifndef __RAND_POOL_NOISE_H__
> >
> > -#define __RAND_POOL_NOISE_H__
> >
> > -
> >
> > -#include <Uefi/UefiBaseType.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
> >
> > -  );
> >
> > -
> >
> > -
> >
> > -#endif // __RAND_POOL_NOISE_H__
> >
> > --
> > 2.27.0.windows.1
> 
> 
>