[PATCH v1 7/9] CryptoPkg: Update HMAC Wrapper implementation with opaque HMAC_CTX object.

[Qin Long <qin.long@intel.com>]

OpenSSL-1.1.xx makes most data structures opaque.
This patch updated HMAC Wrapper implementation with opaque HMAC_CTX object.
The HmacXXGetContextSize() was updated to use the fixed HMAC_CTX size, which
is just kept for compatibility.
And add new APIs (HmacXXNew(), HmacXXFree()) as the recommended HMAC_CTX
usage interfaces for HMAC-XXXX operations.

Cc: Ting Ye <ting.ye@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Gary Lin <glin@suse.com>
Cc: Ronald Cron <ronald.cron@arm.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Qin Long <qin.long@intel.com>
---
 CryptoPkg/Include/Library/BaseCryptLib.h           | 87 +++++++++++++++++++++-
 CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacMd5.c | 75 ++++++++++++++++---
 .../Library/BaseCryptLib/Hmac/CryptHmacMd5Null.c   | 38 +++++++++-
 .../Library/BaseCryptLib/Hmac/CryptHmacSha1.c      | 73 ++++++++++++++++--
 .../Library/BaseCryptLib/Hmac/CryptHmacSha1Null.c  | 38 +++++++++-
 .../Library/BaseCryptLib/Hmac/CryptHmacSha256.c    | 73 ++++++++++++++++--
 .../BaseCryptLib/Hmac/CryptHmacSha256Null.c        | 38 +++++++++-
 7 files changed, 393 insertions(+), 29 deletions(-)

diff --git a/CryptoPkg/Include/Library/BaseCryptLib.h b/CryptoPkg/Include/Library/BaseCryptLib.h
index 9cc4776c30..d3d4961ea4 100644
--- a/CryptoPkg/Include/Library/BaseCryptLib.h
+++ b/CryptoPkg/Include/Library/BaseCryptLib.h
@@ -4,7 +4,7 @@
   primitives (Hash Serials, HMAC, RSA, Diffie-Hellman, etc) for UEFI security
   functionality enabling.
 
-Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2009 - 2017, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution.  The full text of the license may be found at
@@ -911,6 +911,36 @@ HmacMd5GetContextSize (
   );
 
 /**
+  Allocates and initializes one HMAC_CTX context for subsequent HMAC-MD5 use.
+
+  If this interface is not supported, then return NULL.
+
+  @return  Pointer to the HMAC_CTX context that has been initialized.
+           If the allocations fails, HmacMd5New() returns NULL.
+  @retval  NULL  This interface is not supported.
+
+**/
+VOID *
+EFIAPI
+HmacMd5New (
+  VOID
+  );
+
+/**
+  Release the specified HMAC_CTX context.
+
+  If this interface is not supported, then do nothing.
+
+  @param[in]  HmacMd5Ctx  Pointer to the HMAC_CTX context to be released.
+
+**/
+VOID
+EFIAPI
+HmacMd5Free (
+  IN  VOID  *HmacMd5Ctx
+  );
+
+/**
   Initializes user-supplied memory pointed by HmacMd5Context as HMAC-MD5 context for
   subsequent use.
 
@@ -1029,6 +1059,36 @@ HmacSha1GetContextSize (
   );
 
 /**
+  Allocates and initializes one HMAC_CTX context for subsequent HMAC-SHA1 use.
+
+  If this interface is not supported, then return NULL.
+
+  @return  Pointer to the HMAC_CTX context that has been initialized.
+           If the allocations fails, HmacSha1New() returns NULL.
+  @return  NULL   This interface is not supported.
+
+**/
+VOID *
+EFIAPI
+HmacSha1New (
+  VOID
+  );
+
+/**
+  Release the specified HMAC_CTX context.
+
+  If this interface is not supported, then do nothing.
+
+  @param[in]  HmacSha1Ctx  Pointer to the HMAC_CTX context to be released.
+
+**/
+VOID
+EFIAPI
+HmacSha1Free (
+  IN  VOID  *HmacSha1Ctx
+  );
+
+/**
   Initializes user-supplied memory pointed by HmacSha1Context as HMAC-SHA1 context for
   subsequent use.
 
@@ -1147,6 +1207,31 @@ HmacSha256GetContextSize (
   );
 
 /**
+  Allocates and initializes one HMAC_CTX context for subsequent HMAC-SHA256 use.
+
+  @return  Pointer to the HMAC_CTX context that has been initialized.
+           If the allocations fails, HmacSha256New() returns NULL.
+
+**/
+VOID *
+EFIAPI
+HmacSha256New (
+  VOID
+  );
+
+/**
+  Release the specified HMAC_CTX context.
+
+  @param[in]  HmacSha256Ctx  Pointer to the HMAC_CTX context to be released.
+
+**/
+VOID
+EFIAPI
+HmacSha256Free (
+  IN  VOID  *HmacSha256Ctx
+  );
+
+/**
   Initializes user-supplied memory pointed by HmacSha256Context as HMAC-SHA256 context for
   subsequent use.
 
diff --git a/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacMd5.c b/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacMd5.c
index 61750616c8..cb1019387c 100644
--- a/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacMd5.c
+++ b/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacMd5.c
@@ -1,7 +1,7 @@
 /** @file
   HMAC-MD5 Wrapper Implementation over OpenSSL.
 
-Copyright (c) 2010 - 2012, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2010 - 2017, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution.  The full text of the license may be found at
@@ -15,6 +15,9 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include "InternalCryptLib.h"
 #include <openssl/hmac.h>
 
+#define HMAC_MD5_CTX_SIZE    sizeof(void *) * 4 + sizeof(unsigned int) + \
+                             sizeof(unsigned char) * HMAC_MAX_MD_CBLOCK
+
 /**
   Retrieves the size, in bytes, of the context buffer required for HMAC-MD5 operations.
 
@@ -29,8 +32,49 @@ HmacMd5GetContextSize (
 {
   //
   // Retrieves the OpenSSL HMAC-MD5 Context Size
+  // NOTE: HMAC_CTX object was made opaque in openssl-1.1.x, here we just use the
+  //       fixed size as a workaround to make this API work for compatibility.
+  //       We should retire HmacMd5GetContextSize() in future, and use HmacMd5New()
+  //       and HmacMd5Free() for context allocation and release.
   //
-  return (UINTN) (sizeof (HMAC_CTX));
+  return (UINTN) HMAC_MD5_CTX_SIZE;
+}
+
+/**
+  Allocates and initializes one HMAC_CTX context for subsequent HMAC-MD5 use.
+
+  @return  Pointer to the HMAC_CTX context that has been initialized.
+           If the allocations fails, HmacMd5New() returns NULL.
+
+**/
+VOID *
+EFIAPI
+HmacMd5New (
+  VOID
+  )
+{
+  //
+  // Allocates & Initializes HMAC_CTX Context by OpenSSL HMAC_CTX_new()
+  //
+  return (VOID *) HMAC_CTX_new ();
+}
+
+/**
+  Release the specified HMAC_CTX context.
+
+  @param[in]  HmacMd5Ctx  Pointer to the HMAC_CTX context to be released.
+
+**/
+VOID
+EFIAPI
+HmacMd5Free (
+  IN  VOID  *HmacMd5Ctx
+  )
+{
+  //
+  // Free OpenSSL HMAC_CTX Context
+  //
+  HMAC_CTX_free ((HMAC_CTX *)HmacMd5Ctx);
 }
 
 /**
@@ -65,8 +109,13 @@ HmacMd5Init (
   //
   // OpenSSL HMAC-MD5 Context Initialization
   //
-  HMAC_CTX_init (HmacMd5Context);
-  HMAC_Init_ex (HmacMd5Context, Key, (UINT32) KeySize, EVP_md5(), NULL);
+  memset(HmacMd5Context, 0, HMAC_MD5_CTX_SIZE);
+  if (HMAC_CTX_reset ((HMAC_CTX *)HmacMd5Context) != 1) {
+    return FALSE;
+  }
+  if (HMAC_Init_ex ((HMAC_CTX *)HmacMd5Context, Key, (UINT32) KeySize, EVP_md5(), NULL) != 1) {
+    return FALSE;
+  }
 
   return TRUE;
 }
@@ -97,8 +146,10 @@ HmacMd5Duplicate (
   if (HmacMd5Context == NULL || NewHmacMd5Context == NULL) {
     return FALSE;
   }
-  
-  CopyMem (NewHmacMd5Context, HmacMd5Context, sizeof (HMAC_CTX));
+
+  if (HMAC_CTX_copy ((HMAC_CTX *)NewHmacMd5Context, (HMAC_CTX *)HmacMd5Context) != 1) {
+    return FALSE;
+  }
 
   return TRUE;
 }
@@ -146,7 +197,9 @@ HmacMd5Update (
   //
   // OpenSSL HMAC-MD5 digest update
   //
-  HMAC_Update (HmacMd5Context, Data, DataSize);
+  if (HMAC_Update ((HMAC_CTX *)HmacMd5Context, Data, DataSize) != 1) {
+    return FALSE;
+  }
 
   return TRUE;
 }
@@ -190,8 +243,12 @@ HmacMd5Final (
   //
   // OpenSSL HMAC-MD5 digest finalization
   //
-  HMAC_Final (HmacMd5Context, HmacValue, &Length);
-  HMAC_CTX_cleanup (HmacMd5Context);
+  if (HMAC_Final ((HMAC_CTX *)HmacMd5Context, HmacValue, &Length) != 1) {
+    return FALSE;
+  }
+  if (HMAC_CTX_reset ((HMAC_CTX *)HmacMd5Context) != 1) {
+    return FALSE;
+  }
 
   return TRUE;
 }
diff --git a/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacMd5Null.c b/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacMd5Null.c
index b4bdde0433..53ce4d9976 100644
--- a/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacMd5Null.c
+++ b/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacMd5Null.c
@@ -1,7 +1,7 @@
 /** @file
   HMAC-MD5 Wrapper Implementation which does not provide real capabilities.
 
-Copyright (c) 2012, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2012 - 2017, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution.  The full text of the license may be found at
@@ -33,6 +33,42 @@ HmacMd5GetContextSize (
 }
 
 /**
+  Allocates and initializes one HMAC_CTX context for subsequent HMAC-MD5 use.
+
+  Return NULL to indicate this interface is not supported.
+
+  @retval NULL  This interface is not supported.
+
+**/
+VOID *
+EFIAPI
+HmacMd5New (
+  VOID
+  )
+{
+  ASSERT (FALSE);
+  return NULL;
+}
+
+/**
+  Release the specified HMAC_CTX context.
+
+  This function will do nothing.
+
+  @param[in]  HmacMd5Ctx  Pointer to the HMAC_CTX context to be released.
+
+**/
+VOID
+EFIAPI
+HmacMd5Free (
+  IN  VOID  *HmacMd5Ctx
+  )
+{
+  ASSERT (FALSE);
+  return;
+}
+
+/**
   Initializes user-supplied memory pointed by HmacMd5Context as HMAC-MD5 context for
   subsequent use. 
 
diff --git a/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacSha1.c b/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacSha1.c
index e6602586ac..9d25aef5b6 100644
--- a/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacSha1.c
+++ b/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacSha1.c
@@ -1,7 +1,7 @@
 /** @file
   HMAC-SHA1 Wrapper Implementation over OpenSSL.
 
-Copyright (c) 2010 - 2012, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2010 - 2017, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution.  The full text of the license may be found at
@@ -15,6 +15,9 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include "InternalCryptLib.h"
 #include <openssl/hmac.h>
 
+#define HMAC_SHA1_CTX_SIZE   sizeof(void *) * 4 + sizeof(unsigned int) + \
+                             sizeof(unsigned char) * HMAC_MAX_MD_CBLOCK
+
 /**
   Retrieves the size, in bytes, of the context buffer required for HMAC-SHA1 operations.
 
@@ -29,8 +32,49 @@ HmacSha1GetContextSize (
 {
   //
   // Retrieves the OpenSSL HMAC-SHA1 Context Size
+  // NOTE: HMAC_CTX object was made opaque in openssl-1.1.x, here we just use the
+  //       fixed size as a workaround to make this API work for compatibility.
+  //       We should retire HmacSha15GetContextSize() in future, and use HmacSha1New()
+  //       and HmacSha1Free() for context allocation and release.
+  //
+  return (UINTN) HMAC_SHA1_CTX_SIZE;
+}
+
+/**
+  Allocates and initializes one HMAC_CTX context for subsequent HMAC-SHA1 use.
+
+  @return  Pointer to the HMAC_CTX context that has been initialized.
+           If the allocations fails, HmacSha1New() returns NULL.
+
+**/
+VOID *
+EFIAPI
+HmacSha1New (
+  VOID
+  )
+{
+  //
+  // Allocates & Initializes HMAC_CTX Context by OpenSSL HMAC_CTX_new()
+  //
+  return (VOID *) HMAC_CTX_new ();
+}
+
+/**
+  Release the specified HMAC_CTX context.
+
+  @param[in]  HmacSha1Ctx  Pointer to the HMAC_CTX context to be released.
+
+**/
+VOID
+EFIAPI
+HmacSha1Free (
+  IN  VOID  *HmacSha1Ctx
+  )
+{
   //
-  return (UINTN) (sizeof (HMAC_CTX));
+  // Free OpenSSL HMAC_CTX Context
+  //
+  HMAC_CTX_free ((HMAC_CTX *)HmacSha1Ctx);
 }
 
 /**
@@ -65,8 +109,13 @@ HmacSha1Init (
   //
   // OpenSSL HMAC-SHA1 Context Initialization
   //
-  HMAC_CTX_init (HmacSha1Context);
-  HMAC_Init_ex (HmacSha1Context, Key, (UINT32) KeySize, EVP_sha1(), NULL);
+  memset(HmacSha1Context, 0, HMAC_SHA1_CTX_SIZE);
+  if (HMAC_CTX_reset ((HMAC_CTX *)HmacSha1Context) != 1) {
+    return FALSE;
+  }
+  if (HMAC_Init_ex ((HMAC_CTX *)HmacSha1Context, Key, (UINT32) KeySize, EVP_sha1(), NULL) != 1) {
+    return FALSE;
+  }
 
   return TRUE;
 }
@@ -98,7 +147,9 @@ HmacSha1Duplicate (
     return FALSE;
   }
 
-  CopyMem (NewHmacSha1Context, HmacSha1Context, sizeof (HMAC_CTX));
+  if (HMAC_CTX_copy ((HMAC_CTX *)NewHmacSha1Context, (HMAC_CTX *)HmacSha1Context) != 1) {
+    return FALSE;
+  }
 
   return TRUE;
 }
@@ -146,7 +197,9 @@ HmacSha1Update (
   //
   // OpenSSL HMAC-SHA1 digest update
   //
-  HMAC_Update (HmacSha1Context, Data, DataSize);
+  if (HMAC_Update ((HMAC_CTX *)HmacSha1Context, Data, DataSize) != 1) {
+    return FALSE;
+  }
 
   return TRUE;
 }
@@ -190,8 +243,12 @@ HmacSha1Final (
   //
   // OpenSSL HMAC-SHA1 digest finalization
   //
-  HMAC_Final (HmacSha1Context, HmacValue, &Length);
-  HMAC_CTX_cleanup (HmacSha1Context);
+  if (HMAC_Final ((HMAC_CTX *)HmacSha1Context, HmacValue, &Length) != 1) {
+    return FALSE;
+  }
+  if (HMAC_CTX_reset ((HMAC_CTX *)HmacSha1Context) != 1) {
+    return FALSE;
+  }
 
   return TRUE;
 }
diff --git a/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacSha1Null.c b/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacSha1Null.c
index b31d0d1402..c11c183160 100644
--- a/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacSha1Null.c
+++ b/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacSha1Null.c
@@ -1,7 +1,7 @@
 /** @file
   HMAC-SHA1 Wrapper Implementation which does not provide real capabilities.  
 
-Copyright (c) 2012, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2012 - 2017, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution.  The full text of the license may be found at
@@ -33,6 +33,42 @@ HmacSha1GetContextSize (
 }
 
 /**
+  Allocates and initializes one HMAC_CTX context for subsequent HMAC-SHA1 use.
+
+  Return NULL to indicate this interface is not supported.
+
+  @return  NULL  This interface is not supported..
+
+**/
+VOID *
+EFIAPI
+HmacSha1New (
+  VOID
+  )
+{
+  ASSERT (FALSE);
+  return NULL;
+}
+
+/**
+  Release the specified HMAC_CTX context.
+
+  This function will do nothing.
+
+  @param[in]  HmacSha1Ctx  Pointer to the HMAC_CTX context to be released.
+
+**/
+VOID
+EFIAPI
+HmacSha1Free (
+  IN  VOID  *HmacSha1Ctx
+  )
+{
+  ASSERT (FALSE);
+  return;
+}
+
+/**
   Initializes user-supplied memory pointed by HmacSha1Context as HMAC-SHA1 context for
   subsequent use.
 
diff --git a/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacSha256.c b/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacSha256.c
index 7726e404f6..f1ae890526 100644
--- a/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacSha256.c
+++ b/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacSha256.c
@@ -1,7 +1,7 @@
 /** @file
   HMAC-SHA256 Wrapper Implementation over OpenSSL.
 
-Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2016 - 2017, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution.  The full text of the license may be found at
@@ -15,6 +15,9 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include "InternalCryptLib.h"
 #include <openssl/hmac.h>
 
+#define HMAC_SHA256_CTX_SIZE   sizeof(void *) * 4 + sizeof(unsigned int) + \
+                               sizeof(unsigned char) * HMAC_MAX_MD_CBLOCK
+
 /**
   Retrieves the size, in bytes, of the context buffer required for HMAC-SHA256 operations.
 
@@ -29,8 +32,49 @@ HmacSha256GetContextSize (
 {
   //
   // Retrieves the OpenSSL HMAC-SHA256 Context Size
+  // NOTE: HMAC_CTX object was made opaque in openssl-1.1.x, here we just use the
+  //       fixed size as a workaround to make this API work for compatibility.
+  //       We should retire HmacSha256GetContextSize() in future, and use HmacSha256New()
+  //       and HmacSha256Free() for context allocation and release.
+  //
+  return (UINTN)HMAC_SHA256_CTX_SIZE;
+}
+
+/**
+  Allocates and initializes one HMAC_CTX context for subsequent HMAC-SHA256 use.
+
+  @return  Pointer to the HMAC_CTX context that has been initialized.
+           If the allocations fails, HmacSha256New() returns NULL.
+
+**/
+VOID *
+EFIAPI
+HmacSha256New (
+  VOID
+  )
+{
+  //
+  // Allocates & Initializes HMAC_CTX Context by OpenSSL HMAC_CTX_new()
+  //
+  return (VOID *) HMAC_CTX_new ();
+}
+
+/**
+  Release the specified HMAC_CTX context.
+
+  @param[in]  HmacSha256Ctx  Pointer to the HMAC_CTX context to be released.
+
+**/
+VOID
+EFIAPI
+HmacSha256Free (
+  IN  VOID  *HmacSha256Ctx
+  )
+{
   //
-  return (UINTN) (sizeof (HMAC_CTX));
+  // Free OpenSSL HMAC_CTX Context
+  //
+  HMAC_CTX_free ((HMAC_CTX *)HmacSha256Ctx);
 }
 
 /**
@@ -65,8 +109,13 @@ HmacSha256Init (
   //
   // OpenSSL HMAC-SHA256 Context Initialization
   //
-  HMAC_CTX_init (HmacSha256Context);
-  HMAC_Init_ex (HmacSha256Context, Key, (UINT32) KeySize, EVP_sha256(), NULL);
+  memset(HmacSha256Context, 0, HMAC_SHA256_CTX_SIZE);
+  if (HMAC_CTX_reset ((HMAC_CTX *)HmacSha256Context) != 1) {
+    return FALSE;
+  }
+  if (HMAC_Init_ex ((HMAC_CTX *)HmacSha256Context, Key, (UINT32) KeySize, EVP_sha256(), NULL) != 1) {
+    return FALSE;
+  }
 
   return TRUE;
 }
@@ -98,7 +147,9 @@ HmacSha256Duplicate (
     return FALSE;
   }
 
-  CopyMem (NewHmacSha256Context, HmacSha256Context, sizeof (HMAC_CTX));
+  if (HMAC_CTX_copy ((HMAC_CTX *)NewHmacSha256Context, (HMAC_CTX *)HmacSha256Context) != 1) {
+    return FALSE;
+  }
 
   return TRUE;
 }
@@ -146,7 +197,9 @@ HmacSha256Update (
   //
   // OpenSSL HMAC-SHA256 digest update
   //
-  HMAC_Update (HmacSha256Context, Data, DataSize);
+  if (HMAC_Update ((HMAC_CTX *)HmacSha256Context, Data, DataSize) != 1) {
+    return FALSE;
+  }
 
   return TRUE;
 }
@@ -190,8 +243,12 @@ HmacSha256Final (
   //
   // OpenSSL HMAC-SHA256 digest finalization
   //
-  HMAC_Final (HmacSha256Context, HmacValue, &Length);
-  HMAC_CTX_cleanup (HmacSha256Context);
+  if (HMAC_Final ((HMAC_CTX *)HmacSha256Context, HmacValue, &Length) != 1) {
+    return FALSE;
+  }
+  if (HMAC_CTX_reset ((HMAC_CTX *)HmacSha256Context) != 1) {
+    return FALSE;
+  }
 
   return TRUE;
 }
diff --git a/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacSha256Null.c b/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacSha256Null.c
index 35abddaa92..dde6afa2f0 100644
--- a/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacSha256Null.c
+++ b/CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacSha256Null.c
@@ -1,7 +1,7 @@
 /** @file
   HMAC-SHA256 Wrapper Implementation which does not provide real capabilities.
 
-Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution.  The full text of the license may be found at
@@ -33,6 +33,42 @@ HmacSha256GetContextSize (
 }
 
 /**
+  Allocates and initializes one HMAC_CTX context for subsequent HMAC-SHA256 use.
+
+  Return NULL to indicate this interface is not supported.
+
+  @return  NULL  This interface is not supported..
+
+**/
+VOID *
+EFIAPI
+HmacSha256New (
+  VOID
+  )
+{
+  ASSERT (FALSE);
+  return NULL;
+}
+
+/**
+  Release the specified HMAC_CTX context.
+
+  This function will do nothing.
+
+  @param[in]  HmacSha256Ctx  Pointer to the HMAC_CTX context to be released.
+
+**/
+VOID
+EFIAPI
+HmacSha256Free (
+  IN  VOID  *HmacSha256Ctx
+  )
+{
+  ASSERT (FALSE);
+  return;
+}
+
+/**
   Initializes user-supplied memory pointed by HmacSha256Context as HMAC-SHA256 context for
   subsequent use.
 
-- 
2.11.1.windows.1