[PATCH v1 3/6] SecurityPkg/HashApiInstanceSha256: Implement API registration mechanism for SHA256

["Sukerkar, Amol N" <amol.n.sukerkar@intel.com>]

This is the HashApiInstance implementation for SHA256 which registers the
SHA256 hash library in CryptoPkg with BaseHashLib based on whether a platform
supports SHA256 hash algorithm (provided by PcdTpm2HashMask).

Signed-off-by: Sukerkar, Amol N <amol.n.sukerkar@intel.com>
---
 SecurityPkg/Library/HashApiInstanceSha256/HashApiInstanceSha256.c   | 128 ++++++++++++++++++++
 SecurityPkg/Library/HashApiInstanceSha256/HashApiInstanceSha256.inf |  40 ++++++
 SecurityPkg/Library/HashApiInstanceSha256/HashApiInstanceSha256.uni |  16 +++
 SecurityPkg/SecurityPkg.dsc                                         |   1 +
 4 files changed, 185 insertions(+)

diff --git a/SecurityPkg/Library/HashApiInstanceSha256/HashApiInstanceSha256.c b/SecurityPkg/Library/HashApiInstanceSha256/HashApiInstanceSha256.c
new file mode 100644
index 000000000000..129d60a387fd
--- /dev/null
+++ b/SecurityPkg/Library/HashApiInstanceSha256/HashApiInstanceSha256.c
@@ -0,0 +1,128 @@
+/** @file
+  This library is BaseCrypto SHA256 hash instance.
+  It can be registered to BaseCrypto router, to serve as hash engine.
+
+Copyright (c) 2013 - 2019, Intel Corporation. All rights reserved. <BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <PiPei.h>
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseCryptLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/HashLib.h>
+
+/**
+  Start hash sequence.
+
+  @param HashHandle Hash handle.
+
+  @retval EFI_SUCCESS          Hash sequence start and HandleHandle returned.
+  @retval EFI_OUT_OF_RESOURCES No enough resource to start hash.
+**/
+EFI_STATUS
+EFIAPI
+Sha256_Init (
+  OUT HASH_HANDLE    *HashHandle
+  )
+{
+  VOID     *Sha256Ctx;
+  UINTN    CtxSize;
+
+  CtxSize = Sha256GetContextSize ();
+  Sha256Ctx = AllocatePool (CtxSize);
+  ASSERT (Sha256Ctx != NULL);
+
+  Sha256Init (Sha256Ctx);
+
+  *HashHandle = (HASH_HANDLE)Sha256Ctx;
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Update hash sequence data.
+
+  @param HashHandle    Hash handle.
+  @param DataToHash    Data to be hashed.
+  @param DataToHashLen Data size.
+
+  @retval EFI_SUCCESS     Hash sequence updated.
+**/
+EFI_STATUS
+EFIAPI
+Sha256_Update (
+  IN HASH_HANDLE    HashHandle,
+  IN VOID           *DataToHash,
+  IN UINTN          DataToHashLen
+  )
+{
+  VOID     *Sha256Ctx;
+
+  Sha256Ctx = (VOID *)HashHandle;
+  Sha256Update (Sha256Ctx, DataToHash, DataToHashLen);
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Complete hash sequence complete.
+
+  @param HashHandle    Hash handle.
+  @param DigestList    Digest list.
+
+  @retval EFI_SUCCESS     Hash sequence complete and DigestList is returned.
+**/
+EFI_STATUS
+EFIAPI
+Sha256_Final (
+  IN HASH_HANDLE         HashHandle,
+  OUT UINT8            **Digest
+  )
+{
+  UINT8         Sha256Digest[SHA256_DIGEST_SIZE];
+  VOID          *Sha256Ctx;
+
+  Sha256Ctx = (VOID *)HashHandle;
+  Sha256Final (Sha256Ctx, Sha256Digest);
+
+  CopyMem (*Digest, Sha256Digest, SHA256_DIGEST_SIZE);
+
+  FreePool (Sha256Ctx);
+
+  return EFI_SUCCESS;
+}
+
+HASH_INTERFACE_UNIFIED_API  mSha256InternalHashApiInstance = {
+  HASH_ALGORITHM_SHA256_GUID,
+  Sha256_Init,
+  Sha256_Update,
+  Sha256_Final,
+};
+
+/**
+  The function register SHA256 instance.
+
+  @retval EFI_SUCCESS   SHA256 instance is registered, or system dose not surpport registr SHA256 instance
+**/
+EFI_STATUS
+EFIAPI
+HashApiInstanceSha256Constructor (
+  VOID
+  )
+{
+  EFI_STATUS  Status;
+
+  Status = RegisterHashApiLib (&mSha256InternalHashApiInstance);
+  if ((Status == EFI_SUCCESS) || (Status == EFI_UNSUPPORTED)) {
+    //
+    // Unsupported means platform policy does not need this instance enabled.
+    //
+    DEBUG ((DEBUG_ERROR, "[ansukerk]: Hash Interface SHA256 is registered\n"));
+    return EFI_SUCCESS;
+  }
+  return Status;
+}
diff --git a/SecurityPkg/Library/HashApiInstanceSha256/HashApiInstanceSha256.inf b/SecurityPkg/Library/HashApiInstanceSha256/HashApiInstanceSha256.inf
new file mode 100644
index 000000000000..08d802cd69f4
--- /dev/null
+++ b/SecurityPkg/Library/HashApiInstanceSha256/HashApiInstanceSha256.inf
@@ -0,0 +1,40 @@
+## @file
+#  Provides BaseCrypto SHA1 hash service
+#
+#  This library can be registered to BaseCrypto router, to serve as hash engine.
+#
+# Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = HashApiInstanceSha256
+  MODULE_UNI_FILE                = HashApiInstanceSha256.uni
+  FILE_GUID                      = 9A7A6AB4-9DA6-4aa4-90CB-6D4B79EDA7B9
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = NULL
+  CONSTRUCTOR                    = HashApiInstanceSha256Constructor
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64
+#
+
+[Sources]
+  HashApiInstanceSha256.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  SecurityPkg/SecurityPkg.dec
+  CryptoPkg/CryptoPkg.dec
+
+[LibraryClasses]
+  BaseLib
+  BaseMemoryLib
+  DebugLib
+  MemoryAllocationLib
+  BaseCryptLib
diff --git a/SecurityPkg/Library/HashApiInstanceSha256/HashApiInstanceSha256.uni b/SecurityPkg/Library/HashApiInstanceSha256/HashApiInstanceSha256.uni
new file mode 100644
index 000000000000..b2121464c552
--- /dev/null
+++ b/SecurityPkg/Library/HashApiInstanceSha256/HashApiInstanceSha256.uni
@@ -0,0 +1,16 @@
+// /** @file
+// Provides BaseCrypto SHA256 hash service
+//
+// This library can be registered to BaseCrypto router, to serve as hash engine.
+//
+// Copyright (c) 2013 - 2014, Intel Corporation. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+// **/
+
+
+#string STR_MODULE_ABSTRACT             #language en-US "Provides BaseCrypto SHA256 hash service API"
+
+#string STR_MODULE_DESCRIPTION          #language en-US "This library can be registered to Base Hash API, to serve as hash engine."
+
diff --git a/SecurityPkg/SecurityPkg.dsc b/SecurityPkg/SecurityPkg.dsc
index 6c0832d48e88..95a5710735e0 100644
--- a/SecurityPkg/SecurityPkg.dsc
+++ b/SecurityPkg/SecurityPkg.dsc
@@ -245,6 +245,7 @@ [Components.IA32, Components.X64]
   # Hash API
   #
   SecurityPkg/Library/HashApiInstanceSha1/HashApiInstanceSha1.inf
+  SecurityPkg/Library/HashApiInstanceSha256/HashApiInstanceSha256.inf
 
   #
   # TPM
-- 
2.16.2.windows.1