[mirror_edk2.git] / SecurityPkg / Library / HashLibBaseCryptoRouter / HashLibBaseCryptoRouterPei.c

/** @file\r
  Ihis library is BaseCrypto router. It will redirect hash request to each individual\r
  hash handler registerd, such as SHA1, SHA256.\r
  Platform can use PcdTpm2HashMask to mask some hash engines.\r
\r
Copyright (c) 2013 - 2015, Intel Corporation. All rights reserved. <BR>\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution.  The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include <PiPei.h>\r
#include <Library/BaseLib.h>\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/Tpm2CommandLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/MemoryAllocationLib.h>\r
#include <Library/PcdLib.h>\r
#include <Library/HobLib.h>\r
#include <Library/HashLib.h>\r
\r
#include "HashLibBaseCryptoRouterCommon.h"\r
\r
#define HASH_LIB_PEI_ROUTER_GUID \\r
  { 0x84681c08, 0x6873, 0x46f3, { 0x8b, 0xb7, 0xab, 0x66, 0x18, 0x95, 0xa1, 0xb3 } }\r
\r
EFI_GUID mHashLibPeiRouterGuid = HASH_LIB_PEI_ROUTER_GUID;\r
\r
typedef struct {\r
  UINTN            HashInterfaceCount;\r
  HASH_INTERFACE   HashInterface[HASH_COUNT];\r
} HASH_INTERFACE_HOB;\r
\r
/**\r
  This function get hash interface.\r
\r
  @retval hash interface.\r
**/\r
HASH_INTERFACE_HOB *\r
InternalGetHashInterface (\r
  VOID\r
  )\r
{\r
  EFI_HOB_GUID_TYPE *Hob;\r
\r
  Hob = GetFirstGuidHob (&mHashLibPeiRouterGuid);\r
  if (Hob == NULL) {\r
    return NULL;\r
  }\r
  return (HASH_INTERFACE_HOB *)(Hob + 1);\r
}\r
\r
/**\r
  Start hash sequence.\r
\r
  @param HashHandle Hash handle.\r
\r
  @retval EFI_SUCCESS          Hash sequence start and HandleHandle returned.\r
  @retval EFI_OUT_OF_RESOURCES No enough resource to start hash.\r
**/\r
EFI_STATUS\r
EFIAPI\r
HashStart (\r
  OUT HASH_HANDLE    *HashHandle\r
  )\r
{\r
  HASH_INTERFACE_HOB *HashInterfaceHob;\r
  HASH_HANDLE        *HashCtx;\r
  UINTN              Index;\r
  UINT32             HashMask;\r
\r
  HashInterfaceHob = InternalGetHashInterface ();\r
  if (HashInterfaceHob == NULL) {\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  if (HashInterfaceHob->HashInterfaceCount == 0) {\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  HashCtx = AllocatePool (sizeof(*HashCtx) * HashInterfaceHob->HashInterfaceCount);\r
  ASSERT (HashCtx != NULL);\r
\r
  for (Index = 0; Index < HashInterfaceHob->HashInterfaceCount; Index++) {\r
    HashMask = Tpm2GetHashMaskFromAlgo (&HashInterfaceHob->HashInterface[Index].HashGuid);\r
    if ((HashMask & PcdGet32 (PcdTpm2HashMask)) != 0) {\r
      HashInterfaceHob->HashInterface[Index].HashInit (&HashCtx[Index]);\r
    }\r
  }\r
\r
  *HashHandle = (HASH_HANDLE)HashCtx;\r
\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
  Update hash sequence data.\r
\r
  @param HashHandle    Hash handle.\r
  @param DataToHash    Data to be hashed.\r
  @param DataToHashLen Data size.\r
\r
  @retval EFI_SUCCESS     Hash sequence updated.\r
**/\r
EFI_STATUS\r
EFIAPI\r
HashUpdate (\r
  IN HASH_HANDLE    HashHandle,\r
  IN VOID           *DataToHash,\r
  IN UINTN          DataToHashLen\r
  )\r
{\r
  HASH_INTERFACE_HOB *HashInterfaceHob;\r
  HASH_HANDLE        *HashCtx;\r
  UINTN              Index;\r
  UINT32             HashMask;\r
\r
  HashInterfaceHob = InternalGetHashInterface ();\r
  if (HashInterfaceHob == NULL) {\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  if (HashInterfaceHob->HashInterfaceCount == 0) {\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  HashCtx = (HASH_HANDLE *)HashHandle;\r
\r
  for (Index = 0; Index < HashInterfaceHob->HashInterfaceCount; Index++) {\r
    HashMask = Tpm2GetHashMaskFromAlgo (&HashInterfaceHob->HashInterface[Index].HashGuid);\r
    if ((HashMask & PcdGet32 (PcdTpm2HashMask)) != 0) {\r
      HashInterfaceHob->HashInterface[Index].HashUpdate (HashCtx[Index], DataToHash, DataToHashLen);\r
    }\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
  Hash sequence complete and extend to PCR.\r
\r
  @param HashHandle    Hash handle.\r
  @param PcrIndex      PCR to be extended.\r
  @param DataToHash    Data to be hashed.\r
  @param DataToHashLen Data size.\r
  @param DigestList    Digest list.\r
\r
  @retval EFI_SUCCESS     Hash sequence complete and DigestList is returned.\r
**/\r
EFI_STATUS\r
EFIAPI\r
HashCompleteAndExtend (\r
  IN HASH_HANDLE         HashHandle,\r
  IN TPMI_DH_PCR         PcrIndex,\r
  IN VOID                *DataToHash,\r
  IN UINTN               DataToHashLen,\r
  OUT TPML_DIGEST_VALUES *DigestList\r
  )\r
{\r
  TPML_DIGEST_VALUES Digest;\r
  HASH_INTERFACE_HOB *HashInterfaceHob;\r
  HASH_HANDLE        *HashCtx;\r
  UINTN              Index;\r
  EFI_STATUS         Status;\r
  UINT32             HashMask;\r
\r
  HashInterfaceHob = InternalGetHashInterface ();\r
  if (HashInterfaceHob == NULL) {\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  if (HashInterfaceHob->HashInterfaceCount == 0) {\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  HashCtx = (HASH_HANDLE *)HashHandle;\r
  ZeroMem (DigestList, sizeof(*DigestList));\r
\r
  for (Index = 0; Index < HashInterfaceHob->HashInterfaceCount; Index++) {\r
    HashMask = Tpm2GetHashMaskFromAlgo (&HashInterfaceHob->HashInterface[Index].HashGuid);\r
    if ((HashMask & PcdGet32 (PcdTpm2HashMask)) != 0) {\r
      HashInterfaceHob->HashInterface[Index].HashUpdate (HashCtx[Index], DataToHash, DataToHashLen);\r
      HashInterfaceHob->HashInterface[Index].HashFinal (HashCtx[Index], &Digest);\r
      Tpm2SetHashToDigestList (DigestList, &Digest);\r
    }\r
  }\r
\r
  FreePool (HashCtx);\r
\r
  Status = Tpm2PcrExtend (\r
             PcrIndex,\r
             DigestList\r
             );\r
  return Status;\r
}\r
\r
/**\r
  Hash data and extend to PCR.\r
\r
  @param PcrIndex      PCR to be extended.\r
  @param DataToHash    Data to be hashed.\r
  @param DataToHashLen Data size.\r
  @param DigestList    Digest list.\r
\r
  @retval EFI_SUCCESS     Hash data and DigestList is returned.\r
**/\r
EFI_STATUS\r
EFIAPI\r
HashAndExtend (\r
  IN TPMI_DH_PCR                    PcrIndex,\r
  IN VOID                           *DataToHash,\r
  IN UINTN                          DataToHashLen,\r
  OUT TPML_DIGEST_VALUES            *DigestList\r
  )\r
{\r
  HASH_INTERFACE_HOB *HashInterfaceHob;\r
  HASH_HANDLE        HashHandle;\r
  EFI_STATUS         Status;\r
\r
  HashInterfaceHob = InternalGetHashInterface ();\r
  if (HashInterfaceHob == NULL) {\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  if (HashInterfaceHob->HashInterfaceCount == 0) {\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  HashStart (&HashHandle);\r
  HashUpdate (HashHandle, DataToHash, DataToHashLen);\r
  Status = HashCompleteAndExtend (HashHandle, PcrIndex, NULL, 0, DigestList);\r
\r
  return Status;\r
}\r
\r
/**\r
  This service register Hash.\r
\r
  @param HashInterface  Hash interface\r
\r
  @retval EFI_SUCCESS          This hash interface is registered successfully.\r
  @retval EFI_UNSUPPORTED      System does not support register this interface.\r
  @retval EFI_ALREADY_STARTED  System already register this interface.\r
**/\r
EFI_STATUS\r
EFIAPI\r
RegisterHashInterfaceLib (\r
  IN HASH_INTERFACE   *HashInterface\r
  )\r
{\r
  UINTN              Index;\r
  HASH_INTERFACE_HOB *HashInterfaceHob;\r
  HASH_INTERFACE_HOB LocalHashInterfaceHob;\r
  UINT32             HashMask;\r
  UINT32             BiosSupportedHashMask;\r
  EFI_STATUS         Status;\r
\r
  //\r
  // Check allow\r
  //\r
  HashMask = Tpm2GetHashMaskFromAlgo (&HashInterface->HashGuid);\r
  if ((HashMask & PcdGet32 (PcdTpm2HashMask)) == 0) {\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  HashInterfaceHob = InternalGetHashInterface ();\r
  if (HashInterfaceHob == NULL) {\r
    ZeroMem (&LocalHashInterfaceHob, sizeof(LocalHashInterfaceHob));\r
    HashInterfaceHob = BuildGuidDataHob (&mHashLibPeiRouterGuid, &LocalHashInterfaceHob, sizeof(LocalHashInterfaceHob));\r
    if (HashInterfaceHob == NULL) {\r
      return EFI_OUT_OF_RESOURCES;\r
    }\r
  }\r
\r
  if (HashInterfaceHob->HashInterfaceCount >= HASH_COUNT) {\r
    return EFI_OUT_OF_RESOURCES;\r
  }\r
  BiosSupportedHashMask = PcdGet32 (PcdTcg2HashAlgorithmBitmap);\r
  Status = PcdSet32S (PcdTcg2HashAlgorithmBitmap, BiosSupportedHashMask | HashMask);\r
  ASSERT_EFI_ERROR (Status);\r
\r
  //\r
  // Check duplication\r
  //\r
  for (Index = 0; Index < HashInterfaceHob->HashInterfaceCount; Index++) {\r
    if (CompareGuid (&HashInterfaceHob->HashInterface[Index].HashGuid, &HashInterface->HashGuid)) {\r
      //\r
      // In PEI phase, there will be shadow driver dispatched again.\r
      //\r
      DEBUG ((EFI_D_INFO, "RegisterHashInterfaceLib - Override\n"));\r
      CopyMem (&HashInterfaceHob->HashInterface[Index], HashInterface, sizeof(*HashInterface));\r
      return EFI_SUCCESS;\r
    }\r
  }\r
\r
  CopyMem (&HashInterfaceHob->HashInterface[HashInterfaceHob->HashInterfaceCount], HashInterface, sizeof(*HashInterface));\r
  HashInterfaceHob->HashInterfaceCount ++;\r
  \r
  return EFI_SUCCESS;\r
}
Commit	Line	Data
	1	/** @file\r
	2	Ihis library is BaseCrypto router. It will redirect hash request to each individual\r
	3	hash handler registerd, such as SHA1, SHA256.\r
	4	Platform can use PcdTpm2HashMask to mask some hash engines.\r
	5	\r
	6	Copyright (c) 2013 - 2015, Intel Corporation. All rights reserved. <BR>\r
	7	This program and the accompanying materials\r
	8	are licensed and made available under the terms and conditions of the BSD License\r
	9	which accompanies this distribution. The full text of the license may be found at\r
	10	http://opensource.org/licenses/bsd-license.php\r
	11	\r
	12	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	13	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	14	\r
	15	**/\r
	16	\r
	17	#include <PiPei.h>\r
	18	#include <Library/BaseLib.h>\r
	19	#include <Library/BaseMemoryLib.h>\r
	20	#include <Library/Tpm2CommandLib.h>\r
	21	#include <Library/DebugLib.h>\r
	22	#include <Library/MemoryAllocationLib.h>\r
	23	#include <Library/PcdLib.h>\r
	24	#include <Library/HobLib.h>\r
	25	#include <Library/HashLib.h>\r
	26	\r
	27	#include "HashLibBaseCryptoRouterCommon.h"\r
	28	\r
	29	#define HASH_LIB_PEI_ROUTER_GUID \\r
	30	{ 0x84681c08, 0x6873, 0x46f3, { 0x8b, 0xb7, 0xab, 0x66, 0x18, 0x95, 0xa1, 0xb3 } }\r
	31	\r
	32	EFI_GUID mHashLibPeiRouterGuid = HASH_LIB_PEI_ROUTER_GUID;\r
	33	\r
	34	typedef struct {\r
	35	UINTN HashInterfaceCount;\r
	36	HASH_INTERFACE HashInterface[HASH_COUNT];\r
	37	} HASH_INTERFACE_HOB;\r
	38	\r
	39	/**\r
	40	This function get hash interface.\r
	41	\r
	42	@retval hash interface.\r
	43	**/\r
	44	HASH_INTERFACE_HOB *\r
	45	InternalGetHashInterface (\r
	46	VOID\r
	47	)\r
	48	{\r
	49	EFI_HOB_GUID_TYPE *Hob;\r
	50	\r
	51	Hob = GetFirstGuidHob (&mHashLibPeiRouterGuid);\r
	52	if (Hob == NULL) {\r
	53	return NULL;\r
	54	}\r
	55	return (HASH_INTERFACE_HOB *)(Hob + 1);\r
	56	}\r
	57	\r
	58	/**\r
	59	Start hash sequence.\r
	60	\r
	61	@param HashHandle Hash handle.\r
	62	\r
	63	@retval EFI_SUCCESS Hash sequence start and HandleHandle returned.\r
	64	@retval EFI_OUT_OF_RESOURCES No enough resource to start hash.\r
	65	**/\r
	66	EFI_STATUS\r
	67	EFIAPI\r
	68	HashStart (\r
	69	OUT HASH_HANDLE *HashHandle\r
	70	)\r
	71	{\r
	72	HASH_INTERFACE_HOB *HashInterfaceHob;\r
	73	HASH_HANDLE *HashCtx;\r
	74	UINTN Index;\r
	75	UINT32 HashMask;\r
	76	\r
	77	HashInterfaceHob = InternalGetHashInterface ();\r
	78	if (HashInterfaceHob == NULL) {\r
	79	return EFI_UNSUPPORTED;\r
	80	}\r
	81	\r
	82	if (HashInterfaceHob->HashInterfaceCount == 0) {\r
	83	return EFI_UNSUPPORTED;\r
	84	}\r
	85	\r
	86	HashCtx = AllocatePool (sizeof(HashCtx) HashInterfaceHob->HashInterfaceCount);\r
	87	ASSERT (HashCtx != NULL);\r
	88	\r
	89	for (Index = 0; Index < HashInterfaceHob->HashInterfaceCount; Index++) {\r
	90	HashMask = Tpm2GetHashMaskFromAlgo (&HashInterfaceHob->HashInterface[Index].HashGuid);\r
	91	if ((HashMask & PcdGet32 (PcdTpm2HashMask)) != 0) {\r
	92	HashInterfaceHob->HashInterface[Index].HashInit (&HashCtx[Index]);\r
	93	}\r
	94	}\r
	95	\r
	96	*HashHandle = (HASH_HANDLE)HashCtx;\r
	97	\r
	98	return EFI_SUCCESS;\r
	99	}\r
	100	\r
	101	/**\r
	102	Update hash sequence data.\r
	103	\r
	104	@param HashHandle Hash handle.\r
	105	@param DataToHash Data to be hashed.\r
	106	@param DataToHashLen Data size.\r
	107	\r
	108	@retval EFI_SUCCESS Hash sequence updated.\r
	109	**/\r
	110	EFI_STATUS\r
	111	EFIAPI\r
	112	HashUpdate (\r
	113	IN HASH_HANDLE HashHandle,\r
	114	IN VOID *DataToHash,\r
	115	IN UINTN DataToHashLen\r
	116	)\r
	117	{\r
	118	HASH_INTERFACE_HOB *HashInterfaceHob;\r
	119	HASH_HANDLE *HashCtx;\r
	120	UINTN Index;\r
	121	UINT32 HashMask;\r
	122	\r
	123	HashInterfaceHob = InternalGetHashInterface ();\r
	124	if (HashInterfaceHob == NULL) {\r
	125	return EFI_UNSUPPORTED;\r
	126	}\r
	127	\r
	128	if (HashInterfaceHob->HashInterfaceCount == 0) {\r
	129	return EFI_UNSUPPORTED;\r
	130	}\r
	131	\r
	132	HashCtx = (HASH_HANDLE *)HashHandle;\r
	133	\r
	134	for (Index = 0; Index < HashInterfaceHob->HashInterfaceCount; Index++) {\r
	135	HashMask = Tpm2GetHashMaskFromAlgo (&HashInterfaceHob->HashInterface[Index].HashGuid);\r
	136	if ((HashMask & PcdGet32 (PcdTpm2HashMask)) != 0) {\r
	137	HashInterfaceHob->HashInterface[Index].HashUpdate (HashCtx[Index], DataToHash, DataToHashLen);\r
	138	}\r
	139	}\r
	140	\r
	141	return EFI_SUCCESS;\r
	142	}\r
	143	\r
	144	/**\r
	145	Hash sequence complete and extend to PCR.\r
	146	\r
	147	@param HashHandle Hash handle.\r
	148	@param PcrIndex PCR to be extended.\r
	149	@param DataToHash Data to be hashed.\r
	150	@param DataToHashLen Data size.\r
	151	@param DigestList Digest list.\r
	152	\r
	153	@retval EFI_SUCCESS Hash sequence complete and DigestList is returned.\r
	154	**/\r
	155	EFI_STATUS\r
	156	EFIAPI\r
	157	HashCompleteAndExtend (\r
	158	IN HASH_HANDLE HashHandle,\r
	159	IN TPMI_DH_PCR PcrIndex,\r
	160	IN VOID *DataToHash,\r
	161	IN UINTN DataToHashLen,\r
	162	OUT TPML_DIGEST_VALUES *DigestList\r
	163	)\r
	164	{\r
	165	TPML_DIGEST_VALUES Digest;\r
	166	HASH_INTERFACE_HOB *HashInterfaceHob;\r
	167	HASH_HANDLE *HashCtx;\r
	168	UINTN Index;\r
	169	EFI_STATUS Status;\r
	170	UINT32 HashMask;\r
	171	\r
	172	HashInterfaceHob = InternalGetHashInterface ();\r
	173	if (HashInterfaceHob == NULL) {\r
	174	return EFI_UNSUPPORTED;\r
	175	}\r
	176	\r
	177	if (HashInterfaceHob->HashInterfaceCount == 0) {\r
	178	return EFI_UNSUPPORTED;\r
	179	}\r
	180	\r
	181	HashCtx = (HASH_HANDLE *)HashHandle;\r
	182	ZeroMem (DigestList, sizeof(*DigestList));\r
	183	\r
	184	for (Index = 0; Index < HashInterfaceHob->HashInterfaceCount; Index++) {\r
	185	HashMask = Tpm2GetHashMaskFromAlgo (&HashInterfaceHob->HashInterface[Index].HashGuid);\r
	186	if ((HashMask & PcdGet32 (PcdTpm2HashMask)) != 0) {\r
	187	HashInterfaceHob->HashInterface[Index].HashUpdate (HashCtx[Index], DataToHash, DataToHashLen);\r
	188	HashInterfaceHob->HashInterface[Index].HashFinal (HashCtx[Index], &Digest);\r
	189	Tpm2SetHashToDigestList (DigestList, &Digest);\r
	190	}\r
	191	}\r
	192	\r
	193	FreePool (HashCtx);\r
	194	\r
	195	Status = Tpm2PcrExtend (\r
	196	PcrIndex,\r
	197	DigestList\r
	198	);\r
	199	return Status;\r
	200	}\r
	201	\r
	202	/**\r
	203	Hash data and extend to PCR.\r
	204	\r
	205	@param PcrIndex PCR to be extended.\r
	206	@param DataToHash Data to be hashed.\r
	207	@param DataToHashLen Data size.\r
	208	@param DigestList Digest list.\r
	209	\r
	210	@retval EFI_SUCCESS Hash data and DigestList is returned.\r
	211	**/\r
	212	EFI_STATUS\r
	213	EFIAPI\r
	214	HashAndExtend (\r
	215	IN TPMI_DH_PCR PcrIndex,\r
	216	IN VOID *DataToHash,\r
	217	IN UINTN DataToHashLen,\r
	218	OUT TPML_DIGEST_VALUES *DigestList\r
	219	)\r
	220	{\r
	221	HASH_INTERFACE_HOB *HashInterfaceHob;\r
	222	HASH_HANDLE HashHandle;\r
	223	EFI_STATUS Status;\r
	224	\r
	225	HashInterfaceHob = InternalGetHashInterface ();\r
	226	if (HashInterfaceHob == NULL) {\r
	227	return EFI_UNSUPPORTED;\r
	228	}\r
	229	\r
	230	if (HashInterfaceHob->HashInterfaceCount == 0) {\r
	231	return EFI_UNSUPPORTED;\r
	232	}\r
	233	\r
	234	HashStart (&HashHandle);\r
	235	HashUpdate (HashHandle, DataToHash, DataToHashLen);\r
	236	Status = HashCompleteAndExtend (HashHandle, PcrIndex, NULL, 0, DigestList);\r
	237	\r
	238	return Status;\r
	239	}\r
	240	\r
	241	/**\r
	242	This service register Hash.\r
	243	\r
	244	@param HashInterface Hash interface\r
	245	\r
	246	@retval EFI_SUCCESS This hash interface is registered successfully.\r
	247	@retval EFI_UNSUPPORTED System does not support register this interface.\r
	248	@retval EFI_ALREADY_STARTED System already register this interface.\r
	249	**/\r
	250	EFI_STATUS\r
	251	EFIAPI\r
	252	RegisterHashInterfaceLib (\r
	253	IN HASH_INTERFACE *HashInterface\r
	254	)\r
	255	{\r
	256	UINTN Index;\r
	257	HASH_INTERFACE_HOB *HashInterfaceHob;\r
	258	HASH_INTERFACE_HOB LocalHashInterfaceHob;\r
	259	UINT32 HashMask;\r
	260	UINT32 BiosSupportedHashMask;\r
	261	EFI_STATUS Status;\r
	262	\r
	263	//\r
	264	// Check allow\r
	265	//\r
	266	HashMask = Tpm2GetHashMaskFromAlgo (&HashInterface->HashGuid);\r
	267	if ((HashMask & PcdGet32 (PcdTpm2HashMask)) == 0) {\r
	268	return EFI_UNSUPPORTED;\r
	269	}\r
	270	\r
	271	HashInterfaceHob = InternalGetHashInterface ();\r
	272	if (HashInterfaceHob == NULL) {\r
	273	ZeroMem (&LocalHashInterfaceHob, sizeof(LocalHashInterfaceHob));\r
	274	HashInterfaceHob = BuildGuidDataHob (&mHashLibPeiRouterGuid, &LocalHashInterfaceHob, sizeof(LocalHashInterfaceHob));\r
	275	if (HashInterfaceHob == NULL) {\r
	276	return EFI_OUT_OF_RESOURCES;\r
	277	}\r
	278	}\r
	279	\r
	280	if (HashInterfaceHob->HashInterfaceCount >= HASH_COUNT) {\r
	281	return EFI_OUT_OF_RESOURCES;\r
	282	}\r
	283	BiosSupportedHashMask = PcdGet32 (PcdTcg2HashAlgorithmBitmap);\r
	284	Status = PcdSet32S (PcdTcg2HashAlgorithmBitmap, BiosSupportedHashMask \| HashMask);\r
	285	ASSERT_EFI_ERROR (Status);\r
	286	\r
	287	//\r
	288	// Check duplication\r
	289	//\r
	290	for (Index = 0; Index < HashInterfaceHob->HashInterfaceCount; Index++) {\r
	291	if (CompareGuid (&HashInterfaceHob->HashInterface[Index].HashGuid, &HashInterface->HashGuid)) {\r
	292	//\r
	293	// In PEI phase, there will be shadow driver dispatched again.\r
	294	//\r
	295	DEBUG ((EFI_D_INFO, "RegisterHashInterfaceLib - Override\n"));\r
	296	CopyMem (&HashInterfaceHob->HashInterface[Index], HashInterface, sizeof(*HashInterface));\r
	297	return EFI_SUCCESS;\r
	298	}\r
	299	}\r
	300	\r
	301	CopyMem (&HashInterfaceHob->HashInterface[HashInterfaceHob->HashInterfaceCount], HashInterface, sizeof(*HashInterface));\r
	302	HashInterfaceHob->HashInterfaceCount ++;\r
	303	\r
	304	return EFI_SUCCESS;\r
	305	}