[edk2-platforms][Patch V4 1/2] MinPlatformPkg: Library for customizing TPM platform hierarchy

[Rodrigo Gonzalez del Cueto <rodrigo.gonzalez.del.cueto@intel.com>]

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2331

In V4:
  + Splitting changes into two patches:
    1) Creation on TpmPlatformHierarchyLib
    2) Modification to Tcg2PlatformDxe

In order to enable some TPM use cases BIOS should enable to customize
the configuration of the TPM platform, provisioning of endorsement,
platform and storage hierarchy.

Cc: Michael Kubacki <michael.a.kubacki@intel.com>
Cc: Chasel Chiu <chasel.chiu@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Liming Gao <liming.gao@intel.com>

Signed-off-by: Rodrigo Gonzalez del Cueto <rodrigo.gonzalez.del.cueto@intel.com>
---
 .../Include/Library/TpmPlatformHierarchyLib.h |  29 +++
 .../Intel/MinPlatformPkg/MinPlatformPkg.dec   |   2 +
 .../Intel/MinPlatformPkg/MinPlatformPkg.dsc   |   1 +
 .../TpmPlatformHierarchyLib.c                 | 216 ++++++++++++++++++
 .../TpmPlatformHierarchyLib.inf               |  45 ++++
 5 files changed, 293 insertions(+)
 create mode 100644 Platform/Intel/MinPlatformPkg/Include/Library/TpmPlatformHierarchyLib.h
 create mode 100644 Platform/Intel/MinPlatformPkg/Tcg/Library/TpmPlatformHierarchyLib/TpmPlatformHierarchyLib.c
 create mode 100644 Platform/Intel/MinPlatformPkg/Tcg/Library/TpmPlatformHierarchyLib/TpmPlatformHierarchyLib.inf

diff --git a/Platform/Intel/MinPlatformPkg/Include/Library/TpmPlatformHierarchyLib.h b/Platform/Intel/MinPlatformPkg/Include/Library/TpmPlatformHierarchyLib.h
new file mode 100644
index 000000000000..ed9709b24a73
--- /dev/null
+++ b/Platform/Intel/MinPlatformPkg/Include/Library/TpmPlatformHierarchyLib.h
@@ -0,0 +1,29 @@
+/** @file
+    TPM Platform Hierarchy configuration library.
+
+    This library provides functions for customizing the TPM's Platform Hierarchy
+    Authorization Value (platformAuth) and Platform Hierarchy Authorization
+    Policy (platformPolicy) can be defined through this function.
+
+Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef _TPM_PLATFORM_HIERARCHY_LIB_H_
+#define _TPM_PLATFORM_HIERARCHY_LIB_H_
+
+#include <PiDxe.h>
+#include <Uefi.h>
+
+/**
+   This service will perform the TPM Platform Hierarchy configuration at the SmmReadyToLock event.
+
+**/
+VOID
+EFIAPI
+ConfigureTpmPlatformHierarchy (
+  VOID
+  );
+
+#endif
diff --git a/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dec b/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dec
index a851021c0b79..92bda3784ffc 100644
--- a/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dec
+++ b/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dec
@@ -62,6 +62,8 @@ BoardInitLib|Include/Library/BoardInitLib.h
 MultiBoardInitSupportLib|Include/Library/MultiBoardInitSupportLib.h
 SecBoardInitLib|Include/Library/SecBoardInitLib.h
 
+TpmPlatformHierarchyLib|Include/Library/TpmPlatformHierarchyLib.h
+
 TestPointLib|Include/Library/TestPointLib.h
 TestPointCheckLib|Include/Library/TestPointCheckLib.h
 
diff --git a/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dsc b/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dsc
index 5f9363ff3228..a01f229a891d 100644
--- a/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dsc
+++ b/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dsc
@@ -102,6 +102,7 @@
   FspWrapperPlatformLib|MinPlatformPkg/FspWrapper/Library/DxeFspWrapperPlatformLib/DxeFspWrapperPlatformLib.inf
   TestPointCheckLib|MinPlatformPkg/Test/Library/TestPointCheckLib/DxeTestPointCheckLib.inf
   TestPointLib|MinPlatformPkg/Test/Library/TestPointLib/DxeTestPointLib.inf
+  TpmPlatformHierarchyLib|MinPlatformPkg/Tcg/Library/TpmPlatformHierarchyLib/TpmPlatformHierarchyLib.inf
 
 [LibraryClasses.common.DXE_SMM_DRIVER]
   SpiFlashCommonLib|MinPlatformPkg/Flash/Library/SpiFlashCommonLibNull/SpiFlashCommonLibNull.inf
diff --git a/Platform/Intel/MinPlatformPkg/Tcg/Library/TpmPlatformHierarchyLib/TpmPlatformHierarchyLib.c b/Platform/Intel/MinPlatformPkg/Tcg/Library/TpmPlatformHierarchyLib/TpmPlatformHierarchyLib.c
new file mode 100644
index 000000000000..448a47cf9f3e
--- /dev/null
+++ b/Platform/Intel/MinPlatformPkg/Tcg/Library/TpmPlatformHierarchyLib/TpmPlatformHierarchyLib.c
@@ -0,0 +1,216 @@
+/** @file
+    TPM Platform Hierarchy configuration library.
+
+    This library provides functions for customizing the TPM's Platform Hierarchy
+    Authorization Value (platformAuth) and Platform Hierarchy Authorization
+    Policy (platformPolicy) can be defined through this function.
+
+    Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+    SPDX-License-Identifier: BSD-2-Clause-Patent
+
+    @par Specification Reference:
+    https://trustedcomputinggroup.org/resource/tcg-tpm-v2-0-provisioning-guidance/
+**/
+
+#include <PiDxe.h>
+
+#include <Library/DebugLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/Tpm2CommandLib.h>
+#include <Library/RngLib.h>
+#include <Library/UefiLib.h>
+#include <Protocol/DxeSmmReadyToLock.h>
+
+//
+// The authorization value may be no larger than the digest produced by the hash
+//   algorithm used for context integrity.
+//
+#define      MAX_NEW_AUTHORIZATION_SIZE SHA512_DIGEST_SIZE
+
+/**
+  Generate high-quality entropy source 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 EFI_SUCCESS        Entropy generation succeeded.
+  @retval EFI_NOT_READY      Failed to request random data.
+
+**/
+EFI_STATUS
+EFIAPI
+RdRandGenerateEntropy (
+  IN UINTN         Length,
+  OUT UINT8        *Entropy
+  )
+{
+  EFI_STATUS  Status;
+  UINTN       BlockCount;
+  UINT64      Seed[2];
+  UINT8       *Ptr;
+
+  Status = EFI_NOT_READY;
+  BlockCount = Length / 64;
+  Ptr = (UINT8 *)Entropy;
+
+  //
+  // Generate high-quality seed for DRBG Entropy
+  //
+  while (BlockCount > 0) {
+    Status = GetRandomNumber128 (Seed);
+    if (EFI_ERROR (Status)) {
+      return Status;
+    }
+    CopyMem (Ptr, Seed, 64);
+
+    BlockCount--;
+    Ptr = Ptr + 64;
+  }
+
+  //
+  // Populate the remained data as request.
+  //
+  Status = GetRandomNumber128 (Seed);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+  CopyMem (Ptr, Seed, (Length % 64));
+
+  return Status;
+}
+
+/**
+  This function returns the maximum size of TPM2B_AUTH; this structure is used for an authorization value
+  and limits an authValue to being no larger than the largest digest produced by a TPM.
+
+  @param[out] AuthSize                 Tpm2 Auth size
+
+  @retval EFI_SUCCESS                  Auth size returned.
+  @retval EFI_DEVICE_ERROR             Can not return platform auth due to device error.
+
+**/
+EFI_STATUS
+EFIAPI
+GetAuthSize (
+  OUT UINT16            *AuthSize
+  )
+{
+  EFI_STATUS            Status;
+  TPML_PCR_SELECTION    Pcrs;
+  UINTN                 Index;
+  UINT16                DigestSize;
+
+  Status = EFI_SUCCESS;
+
+  while (mAuthSize == 0) {
+
+    mAuthSize = SHA1_DIGEST_SIZE;
+    ZeroMem (&Pcrs, sizeof (TPML_PCR_SELECTION));
+    Status = Tpm2GetCapabilityPcrs (&Pcrs);
+
+    if (EFI_ERROR (Status)) {
+      DEBUG ((DEBUG_ERROR, "Tpm2GetCapabilityPcrs fail!\n"));
+      break;
+    }
+
+    DEBUG ((DEBUG_ERROR, "Tpm2GetCapabilityPcrs - %08x\n", Pcrs.count));
+
+    for (Index = 0; Index < Pcrs.count; Index++) {
+      DEBUG ((DEBUG_ERROR, "alg - %x\n", Pcrs.pcrSelections[Index].hash));
+
+      switch (Pcrs.pcrSelections[Index].hash) {
+      case TPM_ALG_SHA1:
+        DigestSize = SHA1_DIGEST_SIZE;
+        break;
+      case TPM_ALG_SHA256:
+        DigestSize = SHA256_DIGEST_SIZE;
+        break;
+      case TPM_ALG_SHA384:
+        DigestSize = SHA384_DIGEST_SIZE;
+        break;
+      case TPM_ALG_SHA512:
+        DigestSize = SHA512_DIGEST_SIZE;
+        break;
+      case TPM_ALG_SM3_256:
+        DigestSize = SM3_256_DIGEST_SIZE;
+        break;
+      default:
+        DigestSize = SHA1_DIGEST_SIZE;
+        break;
+      }
+
+      if (DigestSize > mAuthSize) {
+        mAuthSize = DigestSize;
+      }
+    }
+    break;
+  }
+
+  *AuthSize = mAuthSize;
+  return Status;
+}
+
+/**
+  Set PlatformAuth to random value.
+**/
+VOID
+RandomizePlatformAuth (
+  VOID
+  )
+{
+  EFI_STATUS                        Status;
+  UINT16                            AuthSize;
+  UINT32                            Index;
+  UINT8                             *Rand;
+  UINTN                             RandSize;
+  TPM2B_AUTH                        NewPlatformAuth;
+
+  //
+  // Send Tpm2HierarchyChange Auth with random value to avoid PlatformAuth being null
+  //
+
+  GetAuthSize (&AuthSize);
+
+  ZeroMem (NewPlatformAuth.buffer, AuthSize);
+  NewPlatformAuth.size = AuthSize;
+
+  //
+  // Allocate one buffer to store random data.
+  //
+  RandSize = MAX_NEW_AUTHORIZATION_SIZE;
+  Rand = AllocatePool (RandSize);
+
+  RdRandGenerateEntropy (RandSize, Rand);
+  CopyMem (NewPlatformAuth.buffer, Rand, AuthSize);
+
+  FreePool (Rand);
+
+  //
+  // Send Tpm2HierarchyChangeAuth command with the new Auth value
+  //
+  Status = Tpm2HierarchyChangeAuth (TPM_RH_PLATFORM, NULL, &NewPlatformAuth);
+  DEBUG ((DEBUG_INFO, "Tpm2HierarchyChangeAuth Result: - %r\n", Status));
+  ZeroMem (NewPlatformAuth.buffer, AuthSize);
+  ZeroMem (Rand, RandSize);
+}
+
+/**
+   This service defines the configuration of the Platform Hierarchy Authorization Value (platformAuth)
+   and Platform Hierarchy Authorization Policy (platformPolicy)
+
+**/
+VOID
+EFIAPI
+ConfigureTpmPlatformHierarchy (
+  )
+{
+  EFI_STATUS   Status;
+  VOID         *Interface;
+
+  //
+  // Send Tpm2HierarchyChange Auth with random value to avoid PlatformAuth being null
+  //
+  RandomizePlatformAuth ();
+}
diff --git a/Platform/Intel/MinPlatformPkg/Tcg/Library/TpmPlatformHierarchyLib/TpmPlatformHierarchyLib.inf b/Platform/Intel/MinPlatformPkg/Tcg/Library/TpmPlatformHierarchyLib/TpmPlatformHierarchyLib.inf
new file mode 100644
index 000000000000..0911bdffa01f
--- /dev/null
+++ b/Platform/Intel/MinPlatformPkg/Tcg/Library/TpmPlatformHierarchyLib/TpmPlatformHierarchyLib.inf
@@ -0,0 +1,45 @@
+### @file
+#
+#   TPM Platform Hierarchy configuration library.
+#
+#   This library provides functions for customizing the TPM's Platform Hierarchy
+#   Authorization Value (platformAuth) and Platform Hierarchy Authorization
+#   Policy (platformPolicy) can be defined through this function.
+#
+# Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+###
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = TpmPlatformHierarchyLib
+  FILE_GUID                      = 7794F92C-4E8E-4E57-9E4A-49A0764C7D73
+  MODULE_TYPE                    = DXE_DRIVER
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = TpmPlatformHierarchyLib
+
+[LibraryClasses]
+  MemoryAllocationLib
+  BaseLib
+  UefiBootServicesTableLib
+  UefiDriverEntryPoint
+  BaseMemoryLib
+  DebugLib
+  Tpm2CommandLib
+  Tpm2DeviceLib
+  RngLib
+  UefiLib
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  SecurityPkg/SecurityPkg.dec
+  CryptoPkg/CryptoPkg.dec
+
+[Sources]
+  TpmPlatformHierarchyLib.c
+
+[Depex]
+  gEfiTcg2ProtocolGuid
-- 
2.22.0.windows.1