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0c18794e | 1 | /** @file\r |
b3548d32 | 2 | The library instance provides security service of TPM measure boot.\r |
0c18794e | 3 | \r |
dc204d5a JY |
4 | Caution: This file requires additional review when modified.\r |
5 | This library will have external input - PE/COFF image and GPT partition.\r | |
6 | This external input must be validated carefully to avoid security issue like\r | |
7 | buffer overflow, integer overflow.\r | |
8 | \r | |
9 | DxeTpmMeasureBootLibImageRead() function will make sure the PE/COFF image content\r | |
10 | read is within the image buffer.\r | |
11 | \r | |
12 | TcgMeasurePeImage() function will accept untrusted PE/COFF image and validate its\r | |
13 | data structure within this image buffer before use.\r | |
14 | \r | |
15 | TcgMeasureGptTable() function will receive untrusted GPT partition table, and parse\r | |
16 | partition data carefully.\r | |
17 | \r | |
b3548d32 | 18 | Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>\r |
289b714b | 19 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
0c18794e | 20 | \r |
21 | **/\r | |
22 | \r | |
23 | #include <PiDxe.h>\r | |
24 | \r | |
25 | #include <Protocol/TcgService.h>\r | |
0c18794e | 26 | #include <Protocol/BlockIo.h>\r |
27 | #include <Protocol/DiskIo.h>\r | |
2aadc920 | 28 | #include <Protocol/FirmwareVolumeBlock.h>\r |
29 | \r | |
0758c830 | 30 | #include <Guid/MeasuredFvHob.h>\r |
0c18794e | 31 | \r |
32 | #include <Library/BaseLib.h>\r | |
33 | #include <Library/DebugLib.h>\r | |
34 | #include <Library/BaseMemoryLib.h>\r | |
35 | #include <Library/MemoryAllocationLib.h>\r | |
36 | #include <Library/DevicePathLib.h>\r | |
37 | #include <Library/UefiBootServicesTableLib.h>\r | |
38 | #include <Library/BaseCryptLib.h>\r | |
39 | #include <Library/PeCoffLib.h>\r | |
40 | #include <Library/SecurityManagementLib.h>\r | |
2aadc920 | 41 | #include <Library/HobLib.h>\r |
0c18794e | 42 | \r |
43 | //\r | |
44 | // Flag to check GPT partition. It only need be measured once.\r | |
45 | //\r | |
46 | BOOLEAN mMeasureGptTableFlag = FALSE;\r | |
0c18794e | 47 | UINTN mMeasureGptCount = 0;\r |
28186d45 | 48 | VOID *mFileBuffer;\r |
a00bd8e0 | 49 | UINTN mTpmImageSize;\r |
2aadc920 | 50 | //\r |
51 | // Measured FV handle cache\r | |
52 | //\r | |
53 | EFI_HANDLE mCacheMeasuredHandle = NULL;\r | |
0758c830 | 54 | MEASURED_HOB_DATA *mMeasuredHobData = NULL;\r |
0c18794e | 55 | \r |
56 | /**\r | |
57 | Reads contents of a PE/COFF image in memory buffer.\r | |
58 | \r | |
dc204d5a JY |
59 | Caution: This function may receive untrusted input.\r |
60 | PE/COFF image is external input, so this function will make sure the PE/COFF image content\r | |
61 | read is within the image buffer.\r | |
62 | \r | |
0c18794e | 63 | @param FileHandle Pointer to the file handle to read the PE/COFF image.\r |
64 | @param FileOffset Offset into the PE/COFF image to begin the read operation.\r | |
b3548d32 | 65 | @param ReadSize On input, the size in bytes of the requested read operation.\r |
0c18794e | 66 | On output, the number of bytes actually read.\r |
67 | @param Buffer Output buffer that contains the data read from the PE/COFF image.\r | |
b3548d32 LG |
68 | \r |
69 | @retval EFI_SUCCESS The specified portion of the PE/COFF image was read and the size\r | |
0c18794e | 70 | **/\r |
71 | EFI_STATUS\r | |
72 | EFIAPI\r | |
e0192326 | 73 | DxeTpmMeasureBootLibImageRead (\r |
0c18794e | 74 | IN VOID *FileHandle,\r |
75 | IN UINTN FileOffset,\r | |
76 | IN OUT UINTN *ReadSize,\r | |
77 | OUT VOID *Buffer\r | |
78 | )\r | |
79 | {\r | |
28186d45 ED |
80 | UINTN EndPosition;\r |
81 | \r | |
82 | if (FileHandle == NULL || ReadSize == NULL || Buffer == NULL) {\r | |
83 | return EFI_INVALID_PARAMETER;\r | |
84 | }\r | |
85 | \r | |
86 | if (MAX_ADDRESS - FileOffset < *ReadSize) {\r | |
87 | return EFI_INVALID_PARAMETER;\r | |
88 | }\r | |
89 | \r | |
90 | EndPosition = FileOffset + *ReadSize;\r | |
a00bd8e0 ED |
91 | if (EndPosition > mTpmImageSize) {\r |
92 | *ReadSize = (UINT32)(mTpmImageSize - FileOffset);\r | |
28186d45 ED |
93 | }\r |
94 | \r | |
a00bd8e0 | 95 | if (FileOffset >= mTpmImageSize) {\r |
28186d45 ED |
96 | *ReadSize = 0;\r |
97 | }\r | |
98 | \r | |
0c18794e | 99 | CopyMem (Buffer, (UINT8 *)((UINTN) FileHandle + FileOffset), *ReadSize);\r |
28186d45 | 100 | \r |
0c18794e | 101 | return EFI_SUCCESS;\r |
102 | }\r | |
103 | \r | |
104 | /**\r | |
105 | Measure GPT table data into TPM log.\r | |
106 | \r | |
dc204d5a JY |
107 | Caution: This function may receive untrusted input.\r |
108 | The GPT partition table is external input, so this function should parse partition data carefully.\r | |
109 | \r | |
0c18794e | 110 | @param TcgProtocol Pointer to the located TCG protocol instance.\r |
111 | @param GptHandle Handle that GPT partition was installed.\r | |
112 | \r | |
113 | @retval EFI_SUCCESS Successfully measure GPT table.\r | |
114 | @retval EFI_UNSUPPORTED Not support GPT table on the given handle.\r | |
115 | @retval EFI_DEVICE_ERROR Can't get GPT table because device error.\r | |
116 | @retval EFI_OUT_OF_RESOURCES No enough resource to measure GPT table.\r | |
117 | @retval other error value\r | |
118 | **/\r | |
119 | EFI_STATUS\r | |
120 | EFIAPI\r | |
121 | TcgMeasureGptTable (\r | |
122 | IN EFI_TCG_PROTOCOL *TcgProtocol,\r | |
123 | IN EFI_HANDLE GptHandle\r | |
124 | )\r | |
125 | {\r | |
126 | EFI_STATUS Status;\r | |
127 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
128 | EFI_DISK_IO_PROTOCOL *DiskIo;\r | |
129 | EFI_PARTITION_TABLE_HEADER *PrimaryHeader;\r | |
130 | EFI_PARTITION_ENTRY *PartitionEntry;\r | |
131 | UINT8 *EntryPtr;\r | |
132 | UINTN NumberOfPartition;\r | |
133 | UINT32 Index;\r | |
134 | TCG_PCR_EVENT *TcgEvent;\r | |
135 | EFI_GPT_DATA *GptData;\r | |
136 | UINT32 EventSize;\r | |
137 | UINT32 EventNumber;\r | |
138 | EFI_PHYSICAL_ADDRESS EventLogLastEntry;\r | |
139 | \r | |
140 | if (mMeasureGptCount > 0) {\r | |
141 | return EFI_SUCCESS;\r | |
142 | }\r | |
143 | \r | |
144 | Status = gBS->HandleProtocol (GptHandle, &gEfiBlockIoProtocolGuid, (VOID**)&BlockIo);\r | |
145 | if (EFI_ERROR (Status)) {\r | |
146 | return EFI_UNSUPPORTED;\r | |
147 | }\r | |
148 | Status = gBS->HandleProtocol (GptHandle, &gEfiDiskIoProtocolGuid, (VOID**)&DiskIo);\r | |
149 | if (EFI_ERROR (Status)) {\r | |
150 | return EFI_UNSUPPORTED;\r | |
151 | }\r | |
152 | //\r | |
153 | // Read the EFI Partition Table Header\r | |
b3548d32 | 154 | //\r |
0c18794e | 155 | PrimaryHeader = (EFI_PARTITION_TABLE_HEADER *) AllocatePool (BlockIo->Media->BlockSize);\r |
156 | if (PrimaryHeader == NULL) {\r | |
157 | return EFI_OUT_OF_RESOURCES;\r | |
b3548d32 | 158 | }\r |
0c18794e | 159 | Status = DiskIo->ReadDisk (\r |
160 | DiskIo,\r | |
161 | BlockIo->Media->MediaId,\r | |
162 | 1 * BlockIo->Media->BlockSize,\r | |
163 | BlockIo->Media->BlockSize,\r | |
164 | (UINT8 *)PrimaryHeader\r | |
165 | );\r | |
166 | if (EFI_ERROR (Status)) {\r | |
167 | DEBUG ((EFI_D_ERROR, "Failed to Read Partition Table Header!\n"));\r | |
168 | FreePool (PrimaryHeader);\r | |
169 | return EFI_DEVICE_ERROR;\r | |
b3548d32 | 170 | }\r |
0c18794e | 171 | //\r |
172 | // Read the partition entry.\r | |
173 | //\r | |
174 | EntryPtr = (UINT8 *)AllocatePool (PrimaryHeader->NumberOfPartitionEntries * PrimaryHeader->SizeOfPartitionEntry);\r | |
175 | if (EntryPtr == NULL) {\r | |
176 | FreePool (PrimaryHeader);\r | |
177 | return EFI_OUT_OF_RESOURCES;\r | |
178 | }\r | |
179 | Status = DiskIo->ReadDisk (\r | |
180 | DiskIo,\r | |
181 | BlockIo->Media->MediaId,\r | |
182 | MultU64x32(PrimaryHeader->PartitionEntryLBA, BlockIo->Media->BlockSize),\r | |
183 | PrimaryHeader->NumberOfPartitionEntries * PrimaryHeader->SizeOfPartitionEntry,\r | |
184 | EntryPtr\r | |
185 | );\r | |
186 | if (EFI_ERROR (Status)) {\r | |
187 | FreePool (PrimaryHeader);\r | |
188 | FreePool (EntryPtr);\r | |
189 | return EFI_DEVICE_ERROR;\r | |
190 | }\r | |
b3548d32 | 191 | \r |
0c18794e | 192 | //\r |
193 | // Count the valid partition\r | |
194 | //\r | |
195 | PartitionEntry = (EFI_PARTITION_ENTRY *)EntryPtr;\r | |
196 | NumberOfPartition = 0;\r | |
197 | for (Index = 0; Index < PrimaryHeader->NumberOfPartitionEntries; Index++) {\r | |
965268ea | 198 | if (!IsZeroGuid (&PartitionEntry->PartitionTypeGUID)) {\r |
b3548d32 | 199 | NumberOfPartition++;\r |
0c18794e | 200 | }\r |
2ea3b920 | 201 | PartitionEntry = (EFI_PARTITION_ENTRY *)((UINT8 *)PartitionEntry + PrimaryHeader->SizeOfPartitionEntry);\r |
0c18794e | 202 | }\r |
203 | \r | |
204 | //\r | |
2ea3b920 | 205 | // Prepare Data for Measurement\r |
b3548d32 LG |
206 | //\r |
207 | EventSize = (UINT32)(sizeof (EFI_GPT_DATA) - sizeof (GptData->Partitions)\r | |
0c18794e | 208 | + NumberOfPartition * PrimaryHeader->SizeOfPartitionEntry);\r |
2ea3b920 | 209 | TcgEvent = (TCG_PCR_EVENT *) AllocateZeroPool (EventSize + sizeof (TCG_PCR_EVENT_HDR));\r |
0c18794e | 210 | if (TcgEvent == NULL) {\r |
211 | FreePool (PrimaryHeader);\r | |
212 | FreePool (EntryPtr);\r | |
213 | return EFI_OUT_OF_RESOURCES;\r | |
214 | }\r | |
215 | \r | |
216 | TcgEvent->PCRIndex = 5;\r | |
217 | TcgEvent->EventType = EV_EFI_GPT_EVENT;\r | |
218 | TcgEvent->EventSize = EventSize;\r | |
b3548d32 | 219 | GptData = (EFI_GPT_DATA *) TcgEvent->Event;\r |
0c18794e | 220 | \r |
221 | //\r | |
222 | // Copy the EFI_PARTITION_TABLE_HEADER and NumberOfPartition\r | |
b3548d32 | 223 | //\r |
0c18794e | 224 | CopyMem ((UINT8 *)GptData, (UINT8*)PrimaryHeader, sizeof (EFI_PARTITION_TABLE_HEADER));\r |
225 | GptData->NumberOfPartitions = NumberOfPartition;\r | |
226 | //\r | |
227 | // Copy the valid partition entry\r | |
228 | //\r | |
229 | PartitionEntry = (EFI_PARTITION_ENTRY*)EntryPtr;\r | |
230 | NumberOfPartition = 0;\r | |
231 | for (Index = 0; Index < PrimaryHeader->NumberOfPartitionEntries; Index++) {\r | |
965268ea | 232 | if (!IsZeroGuid (&PartitionEntry->PartitionTypeGUID)) {\r |
0c18794e | 233 | CopyMem (\r |
2ea3b920 | 234 | (UINT8 *)&GptData->Partitions + NumberOfPartition * PrimaryHeader->SizeOfPartitionEntry,\r |
0c18794e | 235 | (UINT8 *)PartitionEntry,\r |
2ea3b920 | 236 | PrimaryHeader->SizeOfPartitionEntry\r |
0c18794e | 237 | );\r |
238 | NumberOfPartition++;\r | |
239 | }\r | |
2ea3b920 | 240 | PartitionEntry =(EFI_PARTITION_ENTRY *)((UINT8 *)PartitionEntry + PrimaryHeader->SizeOfPartitionEntry);\r |
0c18794e | 241 | }\r |
242 | \r | |
243 | //\r | |
244 | // Measure the GPT data\r | |
245 | //\r | |
246 | EventNumber = 1;\r | |
247 | Status = TcgProtocol->HashLogExtendEvent (\r | |
248 | TcgProtocol,\r | |
249 | (EFI_PHYSICAL_ADDRESS) (UINTN) (VOID *) GptData,\r | |
250 | (UINT64) TcgEvent->EventSize,\r | |
251 | TPM_ALG_SHA,\r | |
252 | TcgEvent,\r | |
253 | &EventNumber,\r | |
254 | &EventLogLastEntry\r | |
255 | );\r | |
256 | if (!EFI_ERROR (Status)) {\r | |
257 | mMeasureGptCount++;\r | |
258 | }\r | |
259 | \r | |
260 | FreePool (PrimaryHeader);\r | |
261 | FreePool (EntryPtr);\r | |
262 | FreePool (TcgEvent);\r | |
263 | \r | |
264 | return Status;\r | |
265 | }\r | |
266 | \r | |
267 | /**\r | |
268 | Measure PE image into TPM log based on the authenticode image hashing in\r | |
269 | PE/COFF Specification 8.0 Appendix A.\r | |
270 | \r | |
dc204d5a JY |
271 | Caution: This function may receive untrusted input.\r |
272 | PE/COFF image is external input, so this function will validate its data structure\r | |
273 | within this image buffer before use.\r | |
274 | \r | |
b3548d32 | 275 | Notes: PE/COFF image has been checked by BasePeCoffLib PeCoffLoaderGetImageInfo() in\r |
e39d0569 LG |
276 | its caller function DxeTpmMeasureBootHandler().\r |
277 | \r | |
0c18794e | 278 | @param[in] TcgProtocol Pointer to the located TCG protocol instance.\r |
279 | @param[in] ImageAddress Start address of image buffer.\r | |
280 | @param[in] ImageSize Image size\r | |
281 | @param[in] LinkTimeBase Address that the image is loaded into memory.\r | |
282 | @param[in] ImageType Image subsystem type.\r | |
283 | @param[in] FilePath File path is corresponding to the input image.\r | |
284 | \r | |
285 | @retval EFI_SUCCESS Successfully measure image.\r | |
286 | @retval EFI_OUT_OF_RESOURCES No enough resource to measure image.\r | |
b3548d32 | 287 | @retval EFI_UNSUPPORTED ImageType is unsupported or PE image is mal-format.\r |
0c18794e | 288 | @retval other error value\r |
551d8081 | 289 | \r |
0c18794e | 290 | **/\r |
291 | EFI_STATUS\r | |
292 | EFIAPI\r | |
293 | TcgMeasurePeImage (\r | |
294 | IN EFI_TCG_PROTOCOL *TcgProtocol,\r | |
295 | IN EFI_PHYSICAL_ADDRESS ImageAddress,\r | |
296 | IN UINTN ImageSize,\r | |
297 | IN UINTN LinkTimeBase,\r | |
298 | IN UINT16 ImageType,\r | |
299 | IN EFI_DEVICE_PATH_PROTOCOL *FilePath\r | |
300 | )\r | |
301 | {\r | |
551d8081 | 302 | EFI_STATUS Status;\r |
303 | TCG_PCR_EVENT *TcgEvent;\r | |
304 | EFI_IMAGE_LOAD_EVENT *ImageLoad;\r | |
305 | UINT32 FilePathSize;\r | |
306 | VOID *Sha1Ctx;\r | |
307 | UINTN CtxSize;\r | |
308 | EFI_IMAGE_DOS_HEADER *DosHdr;\r | |
309 | UINT32 PeCoffHeaderOffset;\r | |
310 | EFI_IMAGE_SECTION_HEADER *Section;\r | |
311 | UINT8 *HashBase;\r | |
312 | UINTN HashSize;\r | |
313 | UINTN SumOfBytesHashed;\r | |
314 | EFI_IMAGE_SECTION_HEADER *SectionHeader;\r | |
315 | UINTN Index;\r | |
316 | UINTN Pos;\r | |
551d8081 | 317 | UINT32 EventSize;\r |
318 | UINT32 EventNumber;\r | |
319 | EFI_PHYSICAL_ADDRESS EventLogLastEntry;\r | |
0c18794e | 320 | EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr;\r |
551d8081 | 321 | UINT32 NumberOfRvaAndSizes;\r |
322 | BOOLEAN HashStatus;\r | |
323 | UINT32 CertSize;\r | |
0c18794e | 324 | \r |
551d8081 | 325 | Status = EFI_UNSUPPORTED;\r |
0c18794e | 326 | ImageLoad = NULL;\r |
327 | SectionHeader = NULL;\r | |
328 | Sha1Ctx = NULL;\r | |
329 | FilePathSize = (UINT32) GetDevicePathSize (FilePath);\r | |
330 | \r | |
331 | //\r | |
332 | // Determine destination PCR by BootPolicy\r | |
333 | //\r | |
334 | EventSize = sizeof (*ImageLoad) - sizeof (ImageLoad->DevicePath) + FilePathSize;\r | |
335 | TcgEvent = AllocateZeroPool (EventSize + sizeof (TCG_PCR_EVENT));\r | |
336 | if (TcgEvent == NULL) {\r | |
337 | return EFI_OUT_OF_RESOURCES;\r | |
338 | }\r | |
339 | \r | |
340 | TcgEvent->EventSize = EventSize;\r | |
341 | ImageLoad = (EFI_IMAGE_LOAD_EVENT *) TcgEvent->Event;\r | |
342 | \r | |
343 | switch (ImageType) {\r | |
344 | case EFI_IMAGE_SUBSYSTEM_EFI_APPLICATION:\r | |
345 | TcgEvent->EventType = EV_EFI_BOOT_SERVICES_APPLICATION;\r | |
346 | TcgEvent->PCRIndex = 4;\r | |
347 | break;\r | |
348 | case EFI_IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER:\r | |
349 | TcgEvent->EventType = EV_EFI_BOOT_SERVICES_DRIVER;\r | |
350 | TcgEvent->PCRIndex = 2;\r | |
351 | break;\r | |
352 | case EFI_IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER:\r | |
353 | TcgEvent->EventType = EV_EFI_RUNTIME_SERVICES_DRIVER;\r | |
354 | TcgEvent->PCRIndex = 2;\r | |
355 | break;\r | |
356 | default:\r | |
357 | DEBUG ((\r | |
358 | EFI_D_ERROR,\r | |
359 | "TcgMeasurePeImage: Unknown subsystem type %d",\r | |
360 | ImageType\r | |
361 | ));\r | |
0c18794e | 362 | goto Finish;\r |
363 | }\r | |
364 | \r | |
365 | ImageLoad->ImageLocationInMemory = ImageAddress;\r | |
366 | ImageLoad->ImageLengthInMemory = ImageSize;\r | |
367 | ImageLoad->ImageLinkTimeAddress = LinkTimeBase;\r | |
368 | ImageLoad->LengthOfDevicePath = FilePathSize;\r | |
7a1f792d ED |
369 | if ((FilePath != NULL) && (FilePathSize != 0)) {\r |
370 | CopyMem (ImageLoad->DevicePath, FilePath, FilePathSize);\r | |
371 | }\r | |
0c18794e | 372 | \r |
373 | //\r | |
374 | // Check PE/COFF image\r | |
375 | //\r | |
376 | DosHdr = (EFI_IMAGE_DOS_HEADER *) (UINTN) ImageAddress;\r | |
377 | PeCoffHeaderOffset = 0;\r | |
378 | if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {\r | |
379 | PeCoffHeaderOffset = DosHdr->e_lfanew;\r | |
380 | }\r | |
551d8081 | 381 | \r |
382 | Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINT8 *) (UINTN) ImageAddress + PeCoffHeaderOffset);\r | |
383 | if (Hdr.Pe32->Signature != EFI_IMAGE_NT_SIGNATURE) {\r | |
0c18794e | 384 | goto Finish;\r |
385 | }\r | |
386 | \r | |
387 | //\r | |
388 | // PE/COFF Image Measurement\r | |
389 | //\r | |
390 | // NOTE: The following codes/steps are based upon the authenticode image hashing in\r | |
391 | // PE/COFF Specification 8.0 Appendix A.\r | |
392 | //\r | |
393 | //\r | |
394 | \r | |
395 | // 1. Load the image header into memory.\r | |
396 | \r | |
397 | // 2. Initialize a SHA hash context.\r | |
398 | CtxSize = Sha1GetContextSize ();\r | |
399 | Sha1Ctx = AllocatePool (CtxSize);\r | |
400 | if (Sha1Ctx == NULL) {\r | |
401 | Status = EFI_OUT_OF_RESOURCES;\r | |
402 | goto Finish;\r | |
403 | }\r | |
404 | \r | |
551d8081 | 405 | HashStatus = Sha1Init (Sha1Ctx);\r |
406 | if (!HashStatus) {\r | |
407 | goto Finish;\r | |
408 | }\r | |
0c18794e | 409 | \r |
410 | //\r | |
411 | // Measuring PE/COFF Image Header;\r | |
412 | // But CheckSum field and SECURITY data directory (certificate) are excluded\r | |
413 | //\r | |
b3548d32 | 414 | \r |
0c18794e | 415 | //\r |
416 | // 3. Calculate the distance from the base of the image header to the image checksum address.\r | |
417 | // 4. Hash the image header from its base to beginning of the image checksum.\r | |
418 | //\r | |
419 | HashBase = (UINT8 *) (UINTN) ImageAddress;\r | |
f199664c | 420 | if (Hdr.Pe32->OptionalHeader.Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {\r |
0c18794e | 421 | //\r |
422 | // Use PE32 offset\r | |
423 | //\r | |
551d8081 | 424 | NumberOfRvaAndSizes = Hdr.Pe32->OptionalHeader.NumberOfRvaAndSizes;\r |
4333b99d | 425 | HashSize = (UINTN) (&Hdr.Pe32->OptionalHeader.CheckSum) - (UINTN) HashBase;\r |
0c18794e | 426 | } else {\r |
427 | //\r | |
428 | // Use PE32+ offset\r | |
429 | //\r | |
551d8081 | 430 | NumberOfRvaAndSizes = Hdr.Pe32Plus->OptionalHeader.NumberOfRvaAndSizes;\r |
4333b99d | 431 | HashSize = (UINTN) (&Hdr.Pe32Plus->OptionalHeader.CheckSum) - (UINTN) HashBase;\r |
0c18794e | 432 | }\r |
433 | \r | |
551d8081 | 434 | HashStatus = Sha1Update (Sha1Ctx, HashBase, HashSize);\r |
435 | if (!HashStatus) {\r | |
436 | goto Finish;\r | |
b3548d32 | 437 | }\r |
0c18794e | 438 | \r |
439 | //\r | |
440 | // 5. Skip over the image checksum (it occupies a single ULONG).\r | |
0c18794e | 441 | //\r |
551d8081 | 442 | if (NumberOfRvaAndSizes <= EFI_IMAGE_DIRECTORY_ENTRY_SECURITY) {\r |
0c18794e | 443 | //\r |
551d8081 | 444 | // 6. Since there is no Cert Directory in optional header, hash everything\r |
445 | // from the end of the checksum to the end of image header.\r | |
0c18794e | 446 | //\r |
f199664c | 447 | if (Hdr.Pe32->OptionalHeader.Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {\r |
551d8081 | 448 | //\r |
449 | // Use PE32 offset.\r | |
450 | //\r | |
451 | HashBase = (UINT8 *) &Hdr.Pe32->OptionalHeader.CheckSum + sizeof (UINT32);\r | |
452 | HashSize = Hdr.Pe32->OptionalHeader.SizeOfHeaders - (UINTN) (HashBase - ImageAddress);\r | |
453 | } else {\r | |
454 | //\r | |
455 | // Use PE32+ offset.\r | |
456 | //\r | |
457 | HashBase = (UINT8 *) &Hdr.Pe32Plus->OptionalHeader.CheckSum + sizeof (UINT32);\r | |
458 | HashSize = Hdr.Pe32Plus->OptionalHeader.SizeOfHeaders - (UINTN) (HashBase - ImageAddress);\r | |
459 | }\r | |
460 | \r | |
461 | if (HashSize != 0) {\r | |
462 | HashStatus = Sha1Update (Sha1Ctx, HashBase, HashSize);\r | |
463 | if (!HashStatus) {\r | |
464 | goto Finish;\r | |
465 | }\r | |
b3548d32 | 466 | }\r |
0c18794e | 467 | } else {\r |
468 | //\r | |
551d8081 | 469 | // 7. Hash everything from the end of the checksum to the start of the Cert Directory.\r |
470 | //\r | |
f199664c | 471 | if (Hdr.Pe32->OptionalHeader.Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {\r |
551d8081 | 472 | //\r |
473 | // Use PE32 offset\r | |
474 | //\r | |
475 | HashBase = (UINT8 *) &Hdr.Pe32->OptionalHeader.CheckSum + sizeof (UINT32);\r | |
4333b99d | 476 | HashSize = (UINTN) (&Hdr.Pe32->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_SECURITY]) - (UINTN) HashBase;\r |
551d8081 | 477 | } else {\r |
478 | //\r | |
479 | // Use PE32+ offset\r | |
b3548d32 | 480 | //\r |
551d8081 | 481 | HashBase = (UINT8 *) &Hdr.Pe32Plus->OptionalHeader.CheckSum + sizeof (UINT32);\r |
4333b99d | 482 | HashSize = (UINTN) (&Hdr.Pe32Plus->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_SECURITY]) - (UINTN) HashBase;\r |
551d8081 | 483 | }\r |
0c18794e | 484 | \r |
551d8081 | 485 | if (HashSize != 0) {\r |
486 | HashStatus = Sha1Update (Sha1Ctx, HashBase, HashSize);\r | |
487 | if (!HashStatus) {\r | |
488 | goto Finish;\r | |
489 | }\r | |
490 | }\r | |
0c18794e | 491 | \r |
0c18794e | 492 | //\r |
551d8081 | 493 | // 8. Skip over the Cert Directory. (It is sizeof(IMAGE_DATA_DIRECTORY) bytes.)\r |
494 | // 9. Hash everything from the end of the Cert Directory to the end of image header.\r | |
0c18794e | 495 | //\r |
f199664c | 496 | if (Hdr.Pe32->OptionalHeader.Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {\r |
551d8081 | 497 | //\r |
498 | // Use PE32 offset\r | |
499 | //\r | |
500 | HashBase = (UINT8 *) &Hdr.Pe32->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_SECURITY + 1];\r | |
501 | HashSize = Hdr.Pe32->OptionalHeader.SizeOfHeaders - (UINTN) (HashBase - ImageAddress);\r | |
502 | } else {\r | |
503 | //\r | |
504 | // Use PE32+ offset\r | |
505 | //\r | |
506 | HashBase = (UINT8 *) &Hdr.Pe32Plus->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_SECURITY + 1];\r | |
507 | HashSize = Hdr.Pe32Plus->OptionalHeader.SizeOfHeaders - (UINTN) (HashBase - ImageAddress);\r | |
508 | }\r | |
b3548d32 | 509 | \r |
551d8081 | 510 | if (HashSize != 0) {\r |
511 | HashStatus = Sha1Update (Sha1Ctx, HashBase, HashSize);\r | |
512 | if (!HashStatus) {\r | |
513 | goto Finish;\r | |
514 | }\r | |
515 | }\r | |
0c18794e | 516 | }\r |
0c18794e | 517 | \r |
518 | //\r | |
519 | // 10. Set the SUM_OF_BYTES_HASHED to the size of the header\r | |
520 | //\r | |
f199664c | 521 | if (Hdr.Pe32->OptionalHeader.Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {\r |
0c18794e | 522 | //\r |
523 | // Use PE32 offset\r | |
524 | //\r | |
525 | SumOfBytesHashed = Hdr.Pe32->OptionalHeader.SizeOfHeaders;\r | |
526 | } else {\r | |
527 | //\r | |
528 | // Use PE32+ offset\r | |
529 | //\r | |
530 | SumOfBytesHashed = Hdr.Pe32Plus->OptionalHeader.SizeOfHeaders;\r | |
531 | }\r | |
532 | \r | |
533 | //\r | |
534 | // 11. Build a temporary table of pointers to all the IMAGE_SECTION_HEADER\r | |
535 | // structures in the image. The 'NumberOfSections' field of the image\r | |
536 | // header indicates how big the table should be. Do not include any\r | |
537 | // IMAGE_SECTION_HEADERs in the table whose 'SizeOfRawData' field is zero.\r | |
538 | //\r | |
551d8081 | 539 | SectionHeader = (EFI_IMAGE_SECTION_HEADER *) AllocateZeroPool (sizeof (EFI_IMAGE_SECTION_HEADER) * Hdr.Pe32->FileHeader.NumberOfSections);\r |
0c18794e | 540 | if (SectionHeader == NULL) {\r |
541 | Status = EFI_OUT_OF_RESOURCES;\r | |
542 | goto Finish;\r | |
543 | }\r | |
544 | \r | |
545 | //\r | |
546 | // 12. Using the 'PointerToRawData' in the referenced section headers as\r | |
547 | // a key, arrange the elements in the table in ascending order. In other\r | |
548 | // words, sort the section headers according to the disk-file offset of\r | |
549 | // the section.\r | |
550 | //\r | |
551 | Section = (EFI_IMAGE_SECTION_HEADER *) (\r | |
552 | (UINT8 *) (UINTN) ImageAddress +\r | |
553 | PeCoffHeaderOffset +\r | |
554 | sizeof(UINT32) +\r | |
555 | sizeof(EFI_IMAGE_FILE_HEADER) +\r | |
556 | Hdr.Pe32->FileHeader.SizeOfOptionalHeader\r | |
557 | );\r | |
558 | for (Index = 0; Index < Hdr.Pe32->FileHeader.NumberOfSections; Index++) {\r | |
559 | Pos = Index;\r | |
560 | while ((Pos > 0) && (Section->PointerToRawData < SectionHeader[Pos - 1].PointerToRawData)) {\r | |
561 | CopyMem (&SectionHeader[Pos], &SectionHeader[Pos - 1], sizeof(EFI_IMAGE_SECTION_HEADER));\r | |
562 | Pos--;\r | |
563 | }\r | |
564 | CopyMem (&SectionHeader[Pos], Section, sizeof(EFI_IMAGE_SECTION_HEADER));\r | |
565 | Section += 1;\r | |
566 | }\r | |
567 | \r | |
568 | //\r | |
569 | // 13. Walk through the sorted table, bring the corresponding section\r | |
570 | // into memory, and hash the entire section (using the 'SizeOfRawData'\r | |
571 | // field in the section header to determine the amount of data to hash).\r | |
572 | // 14. Add the section's 'SizeOfRawData' to SUM_OF_BYTES_HASHED .\r | |
573 | // 15. Repeat steps 13 and 14 for all the sections in the sorted table.\r | |
574 | //\r | |
575 | for (Index = 0; Index < Hdr.Pe32->FileHeader.NumberOfSections; Index++) {\r | |
576 | Section = (EFI_IMAGE_SECTION_HEADER *) &SectionHeader[Index];\r | |
577 | if (Section->SizeOfRawData == 0) {\r | |
578 | continue;\r | |
579 | }\r | |
580 | HashBase = (UINT8 *) (UINTN) ImageAddress + Section->PointerToRawData;\r | |
581 | HashSize = (UINTN) Section->SizeOfRawData;\r | |
582 | \r | |
551d8081 | 583 | HashStatus = Sha1Update (Sha1Ctx, HashBase, HashSize);\r |
584 | if (!HashStatus) {\r | |
585 | goto Finish;\r | |
586 | }\r | |
0c18794e | 587 | \r |
588 | SumOfBytesHashed += HashSize;\r | |
589 | }\r | |
590 | \r | |
591 | //\r | |
592 | // 16. If the file size is greater than SUM_OF_BYTES_HASHED, there is extra\r | |
593 | // data in the file that needs to be added to the hash. This data begins\r | |
594 | // at file offset SUM_OF_BYTES_HASHED and its length is:\r | |
595 | // FileSize - (CertDirectory->Size)\r | |
596 | //\r | |
597 | if (ImageSize > SumOfBytesHashed) {\r | |
598 | HashBase = (UINT8 *) (UINTN) ImageAddress + SumOfBytesHashed;\r | |
551d8081 | 599 | \r |
600 | if (NumberOfRvaAndSizes <= EFI_IMAGE_DIRECTORY_ENTRY_SECURITY) {\r | |
601 | CertSize = 0;\r | |
0c18794e | 602 | } else {\r |
f199664c | 603 | if (Hdr.Pe32->OptionalHeader.Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {\r |
551d8081 | 604 | //\r |
605 | // Use PE32 offset.\r | |
606 | //\r | |
607 | CertSize = Hdr.Pe32->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_SECURITY].Size;\r | |
608 | } else {\r | |
609 | //\r | |
610 | // Use PE32+ offset.\r | |
611 | //\r | |
612 | CertSize = Hdr.Pe32Plus->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_SECURITY].Size;\r | |
28186d45 | 613 | }\r |
0c18794e | 614 | }\r |
615 | \r | |
551d8081 | 616 | if (ImageSize > CertSize + SumOfBytesHashed) {\r |
617 | HashSize = (UINTN) (ImageSize - CertSize - SumOfBytesHashed);\r | |
618 | \r | |
619 | HashStatus = Sha1Update (Sha1Ctx, HashBase, HashSize);\r | |
620 | if (!HashStatus) {\r | |
621 | goto Finish;\r | |
622 | }\r | |
623 | } else if (ImageSize < CertSize + SumOfBytesHashed) {\r | |
624 | goto Finish;\r | |
625 | }\r | |
0c18794e | 626 | }\r |
627 | \r | |
628 | //\r | |
629 | // 17. Finalize the SHA hash.\r | |
630 | //\r | |
551d8081 | 631 | HashStatus = Sha1Final (Sha1Ctx, (UINT8 *) &TcgEvent->Digest);\r |
632 | if (!HashStatus) {\r | |
633 | goto Finish;\r | |
634 | }\r | |
0c18794e | 635 | \r |
636 | //\r | |
637 | // Log the PE data\r | |
638 | //\r | |
639 | EventNumber = 1;\r | |
640 | Status = TcgProtocol->HashLogExtendEvent (\r | |
641 | TcgProtocol,\r | |
642 | (EFI_PHYSICAL_ADDRESS) (UINTN) (VOID *) NULL,\r | |
643 | 0,\r | |
644 | TPM_ALG_SHA,\r | |
645 | TcgEvent,\r | |
646 | &EventNumber,\r | |
647 | &EventLogLastEntry\r | |
648 | );\r | |
772b6011 | 649 | if (Status == EFI_OUT_OF_RESOURCES) {\r |
650 | //\r | |
651 | // Out of resource here means the image is hashed and its result is extended to PCR.\r | |
d6b926e7 | 652 | // But the event log can't be saved since log area is full.\r |
772b6011 | 653 | // Just return EFI_SUCCESS in order not to block the image load.\r |
654 | //\r | |
655 | Status = EFI_SUCCESS;\r | |
656 | }\r | |
0c18794e | 657 | \r |
658 | Finish:\r | |
659 | FreePool (TcgEvent);\r | |
660 | \r | |
661 | if (SectionHeader != NULL) {\r | |
662 | FreePool (SectionHeader);\r | |
663 | }\r | |
664 | \r | |
665 | if (Sha1Ctx != NULL ) {\r | |
666 | FreePool (Sha1Ctx);\r | |
667 | }\r | |
668 | return Status;\r | |
669 | }\r | |
670 | \r | |
671 | /**\r | |
b3548d32 LG |
672 | The security handler is used to abstract platform-specific policy\r |
673 | from the DXE core response to an attempt to use a file that returns a\r | |
674 | given status for the authentication check from the section extraction protocol.\r | |
0c18794e | 675 | \r |
b3548d32 LG |
676 | The possible responses in a given SAP implementation may include locking\r |
677 | flash upon failure to authenticate, attestation logging for all signed drivers,\r | |
678 | and other exception operations. The File parameter allows for possible logging\r | |
0c18794e | 679 | within the SAP of the driver.\r |
680 | \r | |
b3548d32 | 681 | If the file specified by File with an authentication status specified by\r |
0c18794e | 682 | AuthenticationStatus is safe for the DXE Core to use, then EFI_SUCCESS is returned.\r |
683 | \r | |
b3548d32 LG |
684 | If the file specified by File with an authentication status specified by\r |
685 | AuthenticationStatus is not safe for the DXE Core to use under any circumstances,\r | |
0c18794e | 686 | then EFI_ACCESS_DENIED is returned.\r |
687 | \r | |
b3548d32 LG |
688 | If the file specified by File with an authentication status specified by\r |
689 | AuthenticationStatus is not safe for the DXE Core to use right now, but it\r | |
690 | might be possible to use it at a future time, then EFI_SECURITY_VIOLATION is\r | |
0c18794e | 691 | returned.\r |
692 | \r | |
1755932f GJ |
693 | If check image specified by FileBuffer and File is NULL meanwhile, return EFI_ACCESS_DENIED.\r |
694 | \r | |
5db28a67 | 695 | @param[in] AuthenticationStatus This is the authentication status returned\r |
0c18794e | 696 | from the securitymeasurement services for the\r |
697 | input file.\r | |
698 | @param[in] File This is a pointer to the device path of the file that is\r | |
699 | being dispatched. This will optionally be used for logging.\r | |
700 | @param[in] FileBuffer File buffer matches the input file device path.\r | |
701 | @param[in] FileSize Size of File buffer matches the input file device path.\r | |
5db28a67 | 702 | @param[in] BootPolicy A boot policy that was used to call LoadImage() UEFI service.\r |
0c18794e | 703 | \r |
5db28a67 LG |
704 | @retval EFI_SUCCESS The file specified by DevicePath and non-NULL\r |
705 | FileBuffer did authenticate, and the platform policy dictates\r | |
706 | that the DXE Foundation may use the file.\r | |
707 | @retval other error value\r | |
0c18794e | 708 | **/\r |
709 | EFI_STATUS\r | |
710 | EFIAPI\r | |
711 | DxeTpmMeasureBootHandler (\r | |
5db28a67 | 712 | IN UINT32 AuthenticationStatus,\r |
1755932f | 713 | IN CONST EFI_DEVICE_PATH_PROTOCOL *File, OPTIONAL\r |
5db28a67 LG |
714 | IN VOID *FileBuffer,\r |
715 | IN UINTN FileSize,\r | |
716 | IN BOOLEAN BootPolicy\r | |
0c18794e | 717 | )\r |
718 | {\r | |
2aadc920 | 719 | EFI_TCG_PROTOCOL *TcgProtocol;\r |
720 | EFI_STATUS Status;\r | |
721 | TCG_EFI_BOOT_SERVICE_CAPABILITY ProtocolCapability;\r | |
722 | UINT32 TCGFeatureFlags;\r | |
723 | EFI_PHYSICAL_ADDRESS EventLogLocation;\r | |
724 | EFI_PHYSICAL_ADDRESS EventLogLastEntry;\r | |
725 | EFI_DEVICE_PATH_PROTOCOL *DevicePathNode;\r | |
726 | EFI_DEVICE_PATH_PROTOCOL *OrigDevicePathNode;\r | |
727 | EFI_HANDLE Handle;\r | |
728 | EFI_HANDLE TempHandle;\r | |
729 | BOOLEAN ApplicationRequired;\r | |
730 | PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;\r | |
731 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvbProtocol;\r | |
732 | EFI_PHYSICAL_ADDRESS FvAddress;\r | |
2aadc920 | 733 | UINT32 Index;\r |
0c18794e | 734 | \r |
0c18794e | 735 | Status = gBS->LocateProtocol (&gEfiTcgProtocolGuid, NULL, (VOID **) &TcgProtocol);\r |
736 | if (EFI_ERROR (Status)) {\r | |
737 | //\r | |
738 | // TCG protocol is not installed. So, TPM is not present.\r | |
739 | // Don't do any measurement, and directly return EFI_SUCCESS.\r | |
740 | //\r | |
741 | return EFI_SUCCESS;\r | |
742 | }\r | |
743 | \r | |
744 | ProtocolCapability.Size = (UINT8) sizeof (ProtocolCapability);\r | |
745 | Status = TcgProtocol->StatusCheck (\r | |
b3548d32 | 746 | TcgProtocol,\r |
0c18794e | 747 | &ProtocolCapability,\r |
748 | &TCGFeatureFlags,\r | |
749 | &EventLogLocation,\r | |
750 | &EventLogLastEntry\r | |
751 | );\r | |
6f785cfc | 752 | if (EFI_ERROR (Status) || ProtocolCapability.TPMDeactivatedFlag || (!ProtocolCapability.TPMPresentFlag)) {\r |
0c18794e | 753 | //\r |
754 | // TPM device doesn't work or activate.\r | |
755 | //\r | |
756 | return EFI_SUCCESS;\r | |
757 | }\r | |
758 | \r | |
759 | //\r | |
760 | // Copy File Device Path\r | |
761 | //\r | |
762 | OrigDevicePathNode = DuplicateDevicePath (File);\r | |
b3548d32 | 763 | \r |
0c18794e | 764 | //\r |
765 | // 1. Check whether this device path support BlockIo protocol.\r | |
766 | // Is so, this device path may be a GPT device path.\r | |
767 | //\r | |
768 | DevicePathNode = OrigDevicePathNode;\r | |
769 | Status = gBS->LocateDevicePath (&gEfiBlockIoProtocolGuid, &DevicePathNode, &Handle);\r | |
770 | if (!EFI_ERROR (Status) && !mMeasureGptTableFlag) {\r | |
771 | //\r | |
fc70522f | 772 | // Find the gpt partition on the given devicepath\r |
0c18794e | 773 | //\r |
774 | DevicePathNode = OrigDevicePathNode;\r | |
4dbb98ab | 775 | ASSERT (DevicePathNode != NULL);\r |
0c18794e | 776 | while (!IsDevicePathEnd (DevicePathNode)) {\r |
777 | //\r | |
778 | // Find the Gpt partition\r | |
779 | //\r | |
780 | if (DevicePathType (DevicePathNode) == MEDIA_DEVICE_PATH &&\r | |
781 | DevicePathSubType (DevicePathNode) == MEDIA_HARDDRIVE_DP) {\r | |
782 | //\r | |
783 | // Check whether it is a gpt partition or not\r | |
b3548d32 LG |
784 | //\r |
785 | if (((HARDDRIVE_DEVICE_PATH *) DevicePathNode)->MBRType == MBR_TYPE_EFI_PARTITION_TABLE_HEADER &&\r | |
0c18794e | 786 | ((HARDDRIVE_DEVICE_PATH *) DevicePathNode)->SignatureType == SIGNATURE_TYPE_GUID) {\r |
787 | \r | |
788 | //\r | |
789 | // Change the partition device path to its parent device path (disk) and get the handle.\r | |
790 | //\r | |
791 | DevicePathNode->Type = END_DEVICE_PATH_TYPE;\r | |
792 | DevicePathNode->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;\r | |
793 | DevicePathNode = OrigDevicePathNode;\r | |
794 | Status = gBS->LocateDevicePath (\r | |
795 | &gEfiDiskIoProtocolGuid,\r | |
796 | &DevicePathNode,\r | |
797 | &Handle\r | |
798 | );\r | |
799 | if (!EFI_ERROR (Status)) {\r | |
800 | //\r | |
801 | // Measure GPT disk.\r | |
802 | //\r | |
803 | Status = TcgMeasureGptTable (TcgProtocol, Handle);\r | |
804 | if (!EFI_ERROR (Status)) {\r | |
805 | //\r | |
806 | // GPT disk check done.\r | |
807 | //\r | |
808 | mMeasureGptTableFlag = TRUE;\r | |
809 | }\r | |
810 | }\r | |
811 | FreePool (OrigDevicePathNode);\r | |
812 | OrigDevicePathNode = DuplicateDevicePath (File);\r | |
813 | ASSERT (OrigDevicePathNode != NULL);\r | |
814 | break;\r | |
815 | }\r | |
816 | }\r | |
817 | DevicePathNode = NextDevicePathNode (DevicePathNode);\r | |
818 | }\r | |
819 | }\r | |
b3548d32 | 820 | \r |
0c18794e | 821 | //\r |
822 | // 2. Measure PE image.\r | |
823 | //\r | |
824 | ApplicationRequired = FALSE;\r | |
825 | \r | |
826 | //\r | |
2aadc920 | 827 | // Check whether this device path support FVB protocol.\r |
0c18794e | 828 | //\r |
829 | DevicePathNode = OrigDevicePathNode;\r | |
2aadc920 | 830 | Status = gBS->LocateDevicePath (&gEfiFirmwareVolumeBlockProtocolGuid, &DevicePathNode, &Handle);\r |
0c18794e | 831 | if (!EFI_ERROR (Status)) {\r |
832 | //\r | |
833 | // Don't check FV image, and directly return EFI_SUCCESS.\r | |
834 | // It can be extended to the specific FV authentication according to the different requirement.\r | |
835 | //\r | |
836 | if (IsDevicePathEnd (DevicePathNode)) {\r | |
837 | return EFI_SUCCESS;\r | |
838 | }\r | |
839 | //\r | |
0758c830 | 840 | // The PE image from unmeasured Firmware volume need be measured\r |
d6b926e7 | 841 | // The PE image from measured Firmware volume will be measured according to policy below.\r |
0758c830 | 842 | // If it is driver, do not measure\r |
2aadc920 | 843 | // If it is application, still measure.\r |
0c18794e | 844 | //\r |
845 | ApplicationRequired = TRUE;\r | |
2aadc920 | 846 | \r |
0758c830 | 847 | if (mCacheMeasuredHandle != Handle && mMeasuredHobData != NULL) {\r |
2aadc920 | 848 | //\r |
849 | // Search for Root FV of this PE image\r | |
850 | //\r | |
851 | TempHandle = Handle;\r | |
852 | do {\r | |
853 | Status = gBS->HandleProtocol(\r | |
b3548d32 | 854 | TempHandle,\r |
2aadc920 | 855 | &gEfiFirmwareVolumeBlockProtocolGuid,\r |
6dbdb191 | 856 | (VOID**)&FvbProtocol\r |
2aadc920 | 857 | );\r |
858 | TempHandle = FvbProtocol->ParentHandle;\r | |
859 | } while (!EFI_ERROR(Status) && FvbProtocol->ParentHandle != NULL);\r | |
860 | \r | |
861 | //\r | |
862 | // Search in measured FV Hob\r | |
863 | //\r | |
864 | Status = FvbProtocol->GetPhysicalAddress(FvbProtocol, &FvAddress);\r | |
865 | if (EFI_ERROR(Status)){\r | |
866 | return Status;\r | |
867 | }\r | |
868 | \r | |
2aadc920 | 869 | ApplicationRequired = FALSE;\r |
870 | \r | |
0758c830 | 871 | for (Index = 0; Index < mMeasuredHobData->Num; Index++) {\r |
872 | if(mMeasuredHobData->MeasuredFvBuf[Index].BlobBase == FvAddress) {\r | |
2aadc920 | 873 | //\r |
874 | // Cache measured FV for next measurement\r | |
875 | //\r | |
876 | mCacheMeasuredHandle = Handle;\r | |
877 | ApplicationRequired = TRUE;\r | |
878 | break;\r | |
879 | }\r | |
880 | }\r | |
881 | }\r | |
0c18794e | 882 | }\r |
2aadc920 | 883 | \r |
0c18794e | 884 | //\r |
885 | // File is not found.\r | |
886 | //\r | |
887 | if (FileBuffer == NULL) {\r | |
888 | Status = EFI_SECURITY_VIOLATION;\r | |
889 | goto Finish;\r | |
890 | }\r | |
891 | \r | |
a00bd8e0 | 892 | mTpmImageSize = FileSize;\r |
28186d45 ED |
893 | mFileBuffer = FileBuffer;\r |
894 | \r | |
0c18794e | 895 | //\r |
896 | // Measure PE Image\r | |
897 | //\r | |
898 | DevicePathNode = OrigDevicePathNode;\r | |
899 | ZeroMem (&ImageContext, sizeof (ImageContext));\r | |
900 | ImageContext.Handle = (VOID *) FileBuffer;\r | |
e0192326 | 901 | ImageContext.ImageRead = (PE_COFF_LOADER_READ_FILE) DxeTpmMeasureBootLibImageRead;\r |
0c18794e | 902 | \r |
903 | //\r | |
904 | // Get information about the image being loaded\r | |
905 | //\r | |
906 | Status = PeCoffLoaderGetImageInfo (&ImageContext);\r | |
907 | if (EFI_ERROR (Status)) {\r | |
1755932f GJ |
908 | //\r |
909 | // Check for invalid parameters.\r | |
910 | //\r | |
911 | if (File == NULL) {\r | |
912 | return EFI_ACCESS_DENIED;\r | |
913 | }\r | |
914 | \r | |
0c18794e | 915 | //\r |
916 | // The information can't be got from the invalid PeImage\r | |
917 | //\r | |
918 | goto Finish;\r | |
919 | }\r | |
b3548d32 | 920 | \r |
0c18794e | 921 | //\r |
922 | // Measure only application if Application flag is set\r | |
923 | // Measure drivers and applications if Application flag is not set\r | |
924 | //\r | |
b3548d32 LG |
925 | if ((!ApplicationRequired) ||\r |
926 | (ApplicationRequired && ImageContext.ImageType == EFI_IMAGE_SUBSYSTEM_EFI_APPLICATION)) {\r | |
0c18794e | 927 | //\r |
928 | // Print the image path to be measured.\r | |
b3548d32 | 929 | //\r |
0c18794e | 930 | DEBUG_CODE_BEGIN ();\r |
931 | CHAR16 *ToText;\r | |
863986b3 RN |
932 | ToText = ConvertDevicePathToText (\r |
933 | DevicePathNode,\r | |
934 | FALSE,\r | |
935 | TRUE\r | |
936 | );\r | |
937 | if (ToText != NULL) {\r | |
938 | DEBUG ((DEBUG_INFO, "The measured image path is %s.\n", ToText));\r | |
939 | FreePool (ToText);\r | |
0c18794e | 940 | }\r |
941 | DEBUG_CODE_END ();\r | |
942 | \r | |
943 | //\r | |
944 | // Measure PE image into TPM log.\r | |
945 | //\r | |
946 | Status = TcgMeasurePeImage (\r | |
947 | TcgProtocol,\r | |
b3548d32 LG |
948 | (EFI_PHYSICAL_ADDRESS) (UINTN) FileBuffer,\r |
949 | FileSize,\r | |
950 | (UINTN) ImageContext.ImageAddress,\r | |
951 | ImageContext.ImageType,\r | |
0c18794e | 952 | DevicePathNode\r |
953 | );\r | |
954 | }\r | |
955 | \r | |
956 | //\r | |
957 | // Done, free the allocated resource.\r | |
958 | //\r | |
959 | Finish:\r | |
5db28a67 LG |
960 | if (OrigDevicePathNode != NULL) {\r |
961 | FreePool (OrigDevicePathNode);\r | |
962 | }\r | |
0c18794e | 963 | \r |
964 | return Status;\r | |
965 | }\r | |
966 | \r | |
967 | /**\r | |
968 | Register the security handler to provide TPM measure boot service.\r | |
969 | \r | |
970 | @param ImageHandle ImageHandle of the loaded driver.\r | |
971 | @param SystemTable Pointer to the EFI System Table.\r | |
972 | \r | |
973 | @retval EFI_SUCCESS Register successfully.\r | |
974 | @retval EFI_OUT_OF_RESOURCES No enough memory to register this handler.\r | |
975 | **/\r | |
976 | EFI_STATUS\r | |
977 | EFIAPI\r | |
978 | DxeTpmMeasureBootLibConstructor (\r | |
979 | IN EFI_HANDLE ImageHandle,\r | |
980 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
981 | )\r | |
982 | {\r | |
2aadc920 | 983 | EFI_HOB_GUID_TYPE *GuidHob;\r |
984 | \r | |
985 | GuidHob = NULL;\r | |
986 | \r | |
0758c830 | 987 | GuidHob = GetFirstGuidHob (&gMeasuredFvHobGuid);\r |
2aadc920 | 988 | \r |
989 | if (GuidHob != NULL) {\r | |
0758c830 | 990 | mMeasuredHobData = GET_GUID_HOB_DATA (GuidHob);\r |
2aadc920 | 991 | }\r |
992 | \r | |
5db28a67 | 993 | return RegisterSecurity2Handler (\r |
0c18794e | 994 | DxeTpmMeasureBootHandler,\r |
995 | EFI_AUTH_OPERATION_MEASURE_IMAGE | EFI_AUTH_OPERATION_IMAGE_REQUIRED\r | |
996 | );\r | |
997 | }\r |