[mirror_edk2.git] / MdeModulePkg / Library / PeiCrc32GuidedSectionExtractLib / PeiCrc32GuidedSectionExtractLib.c

/** @file\r
\r
  This library registers CRC32 guided section handler \r
  to parse CRC32 encapsulation section and extract raw data.\r
\r
Copyright (c) 2007 - 2014, 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 <Guid/Crc32GuidedSectionExtraction.h>\r
#include <Library/ExtractGuidedSectionLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/BaseMemoryLib.h>\r
\r
///\r
/// CRC32 Guided Section header\r
///\r
typedef struct {\r
  EFI_GUID_DEFINED_SECTION  GuidedSectionHeader; ///< EFI guided section header\r
  UINT32                    CRC32Checksum;       ///< 32bit CRC check sum\r
} CRC32_SECTION_HEADER;\r
\r
typedef struct {\r
  EFI_GUID_DEFINED_SECTION2 GuidedSectionHeader; ///< EFI guided section header\r
  UINT32                    CRC32Checksum;       ///< 32bit CRC check sum\r
} CRC32_SECTION2_HEADER;\r
\r
/**\r
  This internal function reverses bits for 32bit data.\r
\r
  @param  Value                 The data to be reversed.\r
\r
  @return                       Data reversed.\r
\r
**/\r
UINT32\r
PeiCrc32GuidedSectionExtractLibReverseBits (\r
  UINT32  Value\r
  )\r
{\r
  UINTN   Index;\r
  UINT32  NewValue;\r
\r
  NewValue = 0;\r
  for (Index = 0; Index < 32; Index++) {\r
    if ((Value & (1 << Index)) != 0) {\r
      NewValue = NewValue | (1 << (31 - Index));\r
    }\r
  }\r
\r
  return NewValue;\r
}\r
\r
/**\r
  Calculate CRC32 for target data.\r
\r
  @param  Data                  The target data.\r
  @param  DataSize              The target data size.\r
  @param  CrcOut                The CRC32 for target data.\r
\r
  @retval EFI_SUCCESS           The CRC32 for target data is calculated successfully.\r
  @retval EFI_INVALID_PARAMETER Some parameter is not valid, so the CRC32 is not\r
                                calculated.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiCrc32GuidedSectionExtractLibCalculateCrc32 (\r
  IN  VOID    *Data,\r
  IN  UINTN   DataSize,\r
  OUT UINT32  *CrcOut\r
  )\r
{\r
  UINT32  CrcTable[256];\r
  UINTN   TableEntry;\r
  UINTN   Index;\r
  UINT32  Value;\r
  UINT32  Crc;\r
  UINT8   *Ptr;\r
\r
  if (Data == NULL || DataSize == 0 || CrcOut == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
  \r
  //\r
  // Initialize CRC32 table.\r
  //\r
  for (TableEntry = 0; TableEntry < 256; TableEntry++) {\r
    Value = PeiCrc32GuidedSectionExtractLibReverseBits ((UINT32) TableEntry);\r
    for (Index = 0; Index < 8; Index++) {\r
      if ((Value & 0x80000000) != 0) {\r
        Value = (Value << 1) ^ 0x04c11db7;\r
      } else {\r
        Value = Value << 1;\r
      }\r
    }\r
    CrcTable[TableEntry] = PeiCrc32GuidedSectionExtractLibReverseBits (Value);\r
  }\r
\r
  //\r
  // Compute CRC\r
  //\r
  Crc = 0xffffffff;\r
  for (Index = 0, Ptr = Data; Index < DataSize; Index++, Ptr++) {\r
    Crc = (Crc >> 8) ^ CrcTable[(UINT8) Crc ^ *Ptr];\r
  }\r
\r
  *CrcOut = Crc ^ 0xffffffff;\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
\r
  GetInfo gets raw data size and attribute of the input guided section.\r
  It first checks whether the input guid section is supported. \r
  If not, EFI_INVALID_PARAMETER will return.\r
\r
  @param InputSection       Buffer containing the input GUIDed section to be processed.\r
  @param OutputBufferSize   The size of OutputBuffer.\r
  @param ScratchBufferSize  The size of ScratchBuffer.\r
  @param SectionAttribute   The attribute of the input guided section.\r
\r
  @retval EFI_SUCCESS            The size of destination buffer, the size of scratch buffer and \r
                                 the attribute of the input section are successull retrieved.\r
  @retval EFI_INVALID_PARAMETER  The GUID in InputSection does not match this instance guid.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
Crc32GuidedSectionGetInfo (\r
  IN  CONST VOID  *InputSection,\r
  OUT UINT32      *OutputBufferSize,\r
  OUT UINT32      *ScratchBufferSize,\r
  OUT UINT16      *SectionAttribute\r
  )\r
{\r
  if (IS_SECTION2 (InputSection)) {\r
    //\r
    // Check whether the input guid section is recognized.\r
    //\r
    if (!CompareGuid (\r
        &gEfiCrc32GuidedSectionExtractionGuid,\r
        &(((EFI_GUID_DEFINED_SECTION2 *) InputSection)->SectionDefinitionGuid))) {\r
      return EFI_INVALID_PARAMETER;\r
    }\r
    //\r
    // Retrieve the size and attribute of the input section data.\r
    //\r
    *SectionAttribute  = ((EFI_GUID_DEFINED_SECTION2 *) InputSection)->Attributes;\r
    *ScratchBufferSize = 0;\r
    *OutputBufferSize  = SECTION2_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION2 *) InputSection)->DataOffset;\r
  } else {\r
    //\r
    // Check whether the input guid section is recognized.\r
    //\r
    if (!CompareGuid (\r
        &gEfiCrc32GuidedSectionExtractionGuid,\r
        &(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid))) {\r
      return EFI_INVALID_PARAMETER;\r
    }\r
    //\r
    // Retrieve the size and attribute of the input section data.\r
    //\r
    *SectionAttribute  = ((EFI_GUID_DEFINED_SECTION *) InputSection)->Attributes;\r
    *ScratchBufferSize = 0;\r
    *OutputBufferSize  = SECTION_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset;\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
\r
  Extraction handler tries to extract raw data from the input guided section.\r
  It also does authentication check for 32bit CRC value in the input guided section.\r
  It first checks whether the input guid section is supported. \r
  If not, EFI_INVALID_PARAMETER will return.\r
\r
  @param InputSection    Buffer containing the input GUIDed section to be processed.\r
  @param OutputBuffer    Buffer to contain the output raw data allocated by the caller.\r
  @param ScratchBuffer   A pointer to a caller-allocated buffer for function internal use.\r
  @param AuthenticationStatus A pointer to a caller-allocated UINT32 that indicates the\r
                              authentication status of the output buffer.\r
\r
  @retval EFI_SUCCESS            Section Data and Auth Status is extracted successfully.\r
  @retval EFI_INVALID_PARAMETER  The GUID in InputSection does not match this instance guid.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
Crc32GuidedSectionHandler (\r
  IN CONST  VOID    *InputSection,\r
  OUT       VOID    **OutputBuffer,\r
  IN        VOID    *ScratchBuffer,        OPTIONAL\r
  OUT       UINT32  *AuthenticationStatus\r
  )\r
{\r
  EFI_STATUS  Status;\r
  UINT32      SectionCrc32Checksum;\r
  UINT32      Crc32Checksum;\r
  UINT32      OutputBufferSize;\r
\r
  if (IS_SECTION2 (InputSection)) {\r
    //\r
    // Check whether the input guid section is recognized.\r
    //\r
    if (!CompareGuid (\r
        &gEfiCrc32GuidedSectionExtractionGuid,\r
        &(((EFI_GUID_DEFINED_SECTION2 *) InputSection)->SectionDefinitionGuid))) {\r
      return EFI_INVALID_PARAMETER;\r
    }\r
  \r
    //\r
    // Get section Crc32 checksum.\r
    //\r
    SectionCrc32Checksum = ((CRC32_SECTION2_HEADER *) InputSection)->CRC32Checksum;\r
    *OutputBuffer      = (UINT8 *) InputSection + ((EFI_GUID_DEFINED_SECTION2 *) InputSection)->DataOffset;\r
    OutputBufferSize   = SECTION2_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION2 *) InputSection)->DataOffset;\r
\r
    //\r
    // Implicitly CRC32 GUIDed section should have STATUS_VALID bit set\r
    //\r
    ASSERT (((EFI_GUID_DEFINED_SECTION2 *) InputSection)->Attributes & EFI_GUIDED_SECTION_AUTH_STATUS_VALID);\r
    *AuthenticationStatus = EFI_AUTH_STATUS_IMAGE_SIGNED;\r
  } else {\r
    //\r
    // Check whether the input guid section is recognized.\r
    //\r
    if (!CompareGuid (\r
        &gEfiCrc32GuidedSectionExtractionGuid,\r
        &(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid))) {\r
      return EFI_INVALID_PARAMETER;\r
    }\r
  \r
    //\r
    // Get section Crc32 checksum.\r
    //\r
    SectionCrc32Checksum = ((CRC32_SECTION_HEADER *) InputSection)->CRC32Checksum;\r
    *OutputBuffer      = (UINT8 *) InputSection + ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset;\r
    OutputBufferSize   = SECTION_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset;\r
\r
    //\r
    // Implicitly CRC32 GUIDed section should have STATUS_VALID bit set\r
    //\r
    ASSERT (((EFI_GUID_DEFINED_SECTION *) InputSection)->Attributes & EFI_GUIDED_SECTION_AUTH_STATUS_VALID);\r
    *AuthenticationStatus = EFI_AUTH_STATUS_IMAGE_SIGNED;\r
  }\r
\r
  //\r
  // Init Checksum value to Zero.\r
  //\r
  Crc32Checksum = 0;\r
\r
  //\r
  // Calculate CRC32 Checksum of Image\r
  //\r
  Status = PeiCrc32GuidedSectionExtractLibCalculateCrc32 (*OutputBuffer, OutputBufferSize, &Crc32Checksum);\r
  if (Status == EFI_SUCCESS) {\r
    if (Crc32Checksum != SectionCrc32Checksum) {\r
      //\r
      // If Crc32 checksum is not matched, AUTH tested failed bit is set.\r
      //\r
      *AuthenticationStatus |= EFI_AUTH_STATUS_TEST_FAILED;\r
    }\r
  } else {\r
    //\r
    // If Crc32 checksum is not calculated, AUTH not tested bit is set.\r
    //\r
    *AuthenticationStatus |= EFI_AUTH_STATUS_NOT_TESTED;\r
  }\r
\r
  //\r
  // Temp solution until PeiCore checks AUTH Status.\r
  //\r
  if ((*AuthenticationStatus & (EFI_AUTH_STATUS_TEST_FAILED | EFI_AUTH_STATUS_NOT_TESTED)) != 0) {\r
    return EFI_ACCESS_DENIED;\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
  Register the handler to extract CRC32 guided section.\r
\r
  @param  FileHandle   The handle of FFS header the loaded driver.\r
  @param  PeiServices  The pointer to the PEI services.\r
\r
  @retval  EFI_SUCCESS           Register successfully.\r
  @retval  EFI_OUT_OF_RESOURCES  Not enough memory to register this handler.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiCrc32GuidedSectionExtractLibConstructor (\r
  IN EFI_PEI_FILE_HANDLE        FileHandle,\r
  IN CONST EFI_PEI_SERVICES     **PeiServices\r
  )\r
{\r
  return ExtractGuidedSectionRegisterHandlers (\r
          &gEfiCrc32GuidedSectionExtractionGuid,\r
          Crc32GuidedSectionGetInfo,\r
          Crc32GuidedSectionHandler\r
          );\r
}\r
Commit	Line	Data
a402e129 MK	1	/** @file\r
	2	\r
	3	This library registers CRC32 guided section handler \r
	4	to parse CRC32 encapsulation section and extract raw data.\r
	5	\r
	6	Copyright (c) 2007 - 2014, 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 <Guid/Crc32GuidedSectionExtraction.h>\r
	19	#include <Library/ExtractGuidedSectionLib.h>\r
	20	#include <Library/DebugLib.h>\r
	21	#include <Library/BaseMemoryLib.h>\r
	22	\r
	23	///\r
	24	/// CRC32 Guided Section header\r
	25	///\r
	26	typedef struct {\r
	27	EFI_GUID_DEFINED_SECTION GuidedSectionHeader; ///< EFI guided section header\r
	28	UINT32 CRC32Checksum; ///< 32bit CRC check sum\r
	29	} CRC32_SECTION_HEADER;\r
	30	\r
	31	typedef struct {\r
	32	EFI_GUID_DEFINED_SECTION2 GuidedSectionHeader; ///< EFI guided section header\r
	33	UINT32 CRC32Checksum; ///< 32bit CRC check sum\r
	34	} CRC32_SECTION2_HEADER;\r
	35	\r
	36	/**\r
	37	This internal function reverses bits for 32bit data.\r
	38	\r
	39	@param Value The data to be reversed.\r
	40	\r
	41	@return Data reversed.\r
	42	\r
	43	**/\r
	44	UINT32\r
	45	PeiCrc32GuidedSectionExtractLibReverseBits (\r
	46	UINT32 Value\r
	47	)\r
	48	{\r
	49	UINTN Index;\r
	50	UINT32 NewValue;\r
	51	\r
	52	NewValue = 0;\r
	53	for (Index = 0; Index < 32; Index++) {\r
	54	if ((Value & (1 << Index)) != 0) {\r
	55	NewValue = NewValue \| (1 << (31 - Index));\r
	56	}\r
	57	}\r
	58	\r
	59	return NewValue;\r
	60	}\r
	61	\r
	62	/**\r
	63	Calculate CRC32 for target data.\r
	64	\r
65	@param Data The target data.\r
66	@param DataSize The target data size.\r
67	@param CrcOut The CRC32 for target data.\r
68	\r
69	@retval EFI_SUCCESS The CRC32 for target data is calculated successfully.\r
70	@retval EFI_INVALID_PARAMETER Some parameter is not valid, so the CRC32 is not\r
71	calculated.\r
72	\r
73	**/\r
74	EFI_STATUS\r
75	EFIAPI\r
76	PeiCrc32GuidedSectionExtractLibCalculateCrc32 (\r
77	IN VOID *Data,\r
78	IN UINTN DataSize,\r
79	OUT UINT32 *CrcOut\r
80	)\r
81	{\r
82	UINT32 CrcTable[256];\r
83	UINTN TableEntry;\r
84	UINTN Index;\r
85	UINT32 Value;\r
86	UINT32 Crc;\r
87	UINT8 *Ptr;\r
88	\r
89	if (Data == NULL \|\| DataSize == 0 \|\| CrcOut == NULL) {\r
90	return EFI_INVALID_PARAMETER;\r
91	}\r
92	\r
93	//\r
94	// Initialize CRC32 table.\r
95	//\r
96	for (TableEntry = 0; TableEntry < 256; TableEntry++) {\r
97	Value = PeiCrc32GuidedSectionExtractLibReverseBits ((UINT32) TableEntry);\r
98	for (Index = 0; Index < 8; Index++) {\r
99	if ((Value & 0x80000000) != 0) {\r
100	Value = (Value << 1) ^ 0x04c11db7;\r
101	} else {\r
102	Value = Value << 1;\r
103	}\r
104	}\r
105	CrcTable[TableEntry] = PeiCrc32GuidedSectionExtractLibReverseBits (Value);\r
106	}\r
107	\r
108	//\r
109	// Compute CRC\r
110	//\r
111	Crc = 0xffffffff;\r
112	for (Index = 0, Ptr = Data; Index < DataSize; Index++, Ptr++) {\r
113	Crc = (Crc >> 8) ^ CrcTable[(UINT8) Crc ^ *Ptr];\r
114	}\r
115	\r
116	*CrcOut = Crc ^ 0xffffffff;\r
117	return EFI_SUCCESS;\r
118	}\r
119	\r
120	/**\r
121	\r
122	GetInfo gets raw data size and attribute of the input guided section.\r
123	It first checks whether the input guid section is supported. \r
124	If not, EFI_INVALID_PARAMETER will return.\r
125	\r
126	@param InputSection Buffer containing the input GUIDed section to be processed.\r
127	@param OutputBufferSize The size of OutputBuffer.\r
128	@param ScratchBufferSize The size of ScratchBuffer.\r
129	@param SectionAttribute The attribute of the input guided section.\r
130	\r
131	@retval EFI_SUCCESS The size of destination buffer, the size of scratch buffer and \r
132	the attribute of the input section are successull retrieved.\r
133	@retval EFI_INVALID_PARAMETER The GUID in InputSection does not match this instance guid.\r
134	\r
135	**/\r
136	EFI_STATUS\r
137	EFIAPI\r
138	Crc32GuidedSectionGetInfo (\r
139	IN CONST VOID *InputSection,\r
140	OUT UINT32 *OutputBufferSize,\r
141	OUT UINT32 *ScratchBufferSize,\r
142	OUT UINT16 *SectionAttribute\r
143	)\r
144	{\r
145	if (IS_SECTION2 (InputSection)) {\r
146	//\r
147	// Check whether the input guid section is recognized.\r
148	//\r
149	if (!CompareGuid (\r
150	&gEfiCrc32GuidedSectionExtractionGuid,\r
151	&(((EFI_GUID_DEFINED_SECTION2 *) InputSection)->SectionDefinitionGuid))) {\r
152	return EFI_INVALID_PARAMETER;\r
153	}\r
154	//\r
155	// Retrieve the size and attribute of the input section data.\r
156	//\r
157	SectionAttribute = ((EFI_GUID_DEFINED_SECTION2 ) InputSection)->Attributes;\r
158	*ScratchBufferSize = 0;\r
159	OutputBufferSize = SECTION2_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION2 ) InputSection)->DataOffset;\r
160	} else {\r
161	//\r
162	// Check whether the input guid section is recognized.\r
163	//\r
164	if (!CompareGuid (\r
165	&gEfiCrc32GuidedSectionExtractionGuid,\r
166	&(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid))) {\r
167	return EFI_INVALID_PARAMETER;\r
168	}\r
169	//\r
170	// Retrieve the size and attribute of the input section data.\r
171	//\r
172	SectionAttribute = ((EFI_GUID_DEFINED_SECTION ) InputSection)->Attributes;\r
173	*ScratchBufferSize = 0;\r
174	OutputBufferSize = SECTION_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION ) InputSection)->DataOffset;\r
175	}\r
176	\r
177	return EFI_SUCCESS;\r
178	}\r
179	\r
180	/**\r
181	\r
182	Extraction handler tries to extract raw data from the input guided section.\r
183	It also does authentication check for 32bit CRC value in the input guided section.\r
184	It first checks whether the input guid section is supported. \r
185	If not, EFI_INVALID_PARAMETER will return.\r
186	\r
187	@param InputSection Buffer containing the input GUIDed section to be processed.\r
188	@param OutputBuffer Buffer to contain the output raw data allocated by the caller.\r
189	@param ScratchBuffer A pointer to a caller-allocated buffer for function internal use.\r
190	@param AuthenticationStatus A pointer to a caller-allocated UINT32 that indicates the\r
191	authentication status of the output buffer.\r
192	\r
193	@retval EFI_SUCCESS Section Data and Auth Status is extracted successfully.\r
194	@retval EFI_INVALID_PARAMETER The GUID in InputSection does not match this instance guid.\r
195	\r
196	**/\r
197	EFI_STATUS\r
198	EFIAPI\r
199	Crc32GuidedSectionHandler (\r
200	IN CONST VOID *InputSection,\r
201	OUT VOID **OutputBuffer,\r
202	IN VOID *ScratchBuffer, OPTIONAL\r
203	OUT UINT32 *AuthenticationStatus\r
204	)\r
205	{\r
206	EFI_STATUS Status;\r
207	UINT32 SectionCrc32Checksum;\r
208	UINT32 Crc32Checksum;\r
209	UINT32 OutputBufferSize;\r
210	\r
211	if (IS_SECTION2 (InputSection)) {\r
212	//\r
213	// Check whether the input guid section is recognized.\r
214	//\r
215	if (!CompareGuid (\r
216	&gEfiCrc32GuidedSectionExtractionGuid,\r
217	&(((EFI_GUID_DEFINED_SECTION2 *) InputSection)->SectionDefinitionGuid))) {\r
218	return EFI_INVALID_PARAMETER;\r
219	}\r
220	\r
221	//\r
222	// Get section Crc32 checksum.\r
223	//\r
224	SectionCrc32Checksum = ((CRC32_SECTION2_HEADER *) InputSection)->CRC32Checksum;\r
225	OutputBuffer = (UINT8 ) InputSection + ((EFI_GUID_DEFINED_SECTION2 *) InputSection)->DataOffset;\r
226	OutputBufferSize = SECTION2_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION2 *) InputSection)->DataOffset;\r
227	\r
228	//\r
229	// Implicitly CRC32 GUIDed section should have STATUS_VALID bit set\r
230	//\r
231	ASSERT (((EFI_GUID_DEFINED_SECTION2 *) InputSection)->Attributes & EFI_GUIDED_SECTION_AUTH_STATUS_VALID);\r
232	*AuthenticationStatus = EFI_AUTH_STATUS_IMAGE_SIGNED;\r
233	} else {\r
234	//\r
235	// Check whether the input guid section is recognized.\r
236	//\r
237	if (!CompareGuid (\r
238	&gEfiCrc32GuidedSectionExtractionGuid,\r
239	&(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid))) {\r
240	return EFI_INVALID_PARAMETER;\r
241	}\r
242	\r
243	//\r
244	// Get section Crc32 checksum.\r
245	//\r
246	SectionCrc32Checksum = ((CRC32_SECTION_HEADER *) InputSection)->CRC32Checksum;\r
247	OutputBuffer = (UINT8 ) InputSection + ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset;\r
248	OutputBufferSize = SECTION_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset;\r
249	\r
250	//\r
251	// Implicitly CRC32 GUIDed section should have STATUS_VALID bit set\r
252	//\r
253	ASSERT (((EFI_GUID_DEFINED_SECTION *) InputSection)->Attributes & EFI_GUIDED_SECTION_AUTH_STATUS_VALID);\r
254	*AuthenticationStatus = EFI_AUTH_STATUS_IMAGE_SIGNED;\r
255	}\r
256	\r
257	//\r
258	// Init Checksum value to Zero.\r
259	//\r
260	Crc32Checksum = 0;\r
261	\r
262	//\r
263	// Calculate CRC32 Checksum of Image\r
264	//\r
265	Status = PeiCrc32GuidedSectionExtractLibCalculateCrc32 (*OutputBuffer, OutputBufferSize, &Crc32Checksum);\r
266	if (Status == EFI_SUCCESS) {\r
267	if (Crc32Checksum != SectionCrc32Checksum) {\r
268	//\r
269	// If Crc32 checksum is not matched, AUTH tested failed bit is set.\r
270	//\r
271	*AuthenticationStatus \|= EFI_AUTH_STATUS_TEST_FAILED;\r
272	}\r
273	} else {\r
274	//\r
275	// If Crc32 checksum is not calculated, AUTH not tested bit is set.\r
276	//\r
277	*AuthenticationStatus \|= EFI_AUTH_STATUS_NOT_TESTED;\r
278	}\r
279	\r
280	//\r
281	// Temp solution until PeiCore checks AUTH Status.\r
282	//\r
283	if ((*AuthenticationStatus & (EFI_AUTH_STATUS_TEST_FAILED \| EFI_AUTH_STATUS_NOT_TESTED)) != 0) {\r
284	return EFI_ACCESS_DENIED;\r
285	}\r
286	\r
287	return EFI_SUCCESS;\r
288	}\r
289	\r
290	/**\r
291	Register the handler to extract CRC32 guided section.\r
292	\r
293	@param FileHandle The handle of FFS header the loaded driver.\r
294	@param PeiServices The pointer to the PEI services.\r
295	\r
296	@retval EFI_SUCCESS Register successfully.\r
297	@retval EFI_OUT_OF_RESOURCES Not enough memory to register this handler.\r
298	\r
299	**/\r
300	EFI_STATUS\r
301	EFIAPI\r
302	PeiCrc32GuidedSectionExtractLibConstructor (\r
303	IN EFI_PEI_FILE_HANDLE FileHandle,\r
304	IN CONST EFI_PEI_SERVICES **PeiServices\r
305	)\r
306	{\r
307	return ExtractGuidedSectionRegisterHandlers (\r
308	&gEfiCrc32GuidedSectionExtractionGuid,\r
309	Crc32GuidedSectionGetInfo,\r
310	Crc32GuidedSectionHandler\r
311	);\r
312	}\r