4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync The library instance provides security service of TPM measure boot.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncCopyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncThis program and the accompanying materials
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncare licensed and made available under the terms and conditions of the BSD License
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncwhich accompanies this distribution. The full text of the license may be found at
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncTHE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncWITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync// Flag to check GPT partition. It only need be measured once.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncEFI_GUID mZeroGuid = {0, 0, 0, {0, 0, 0, 0, 0, 0, 0, 0}};
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Reads contents of a PE/COFF image in memory buffer.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param FileHandle Pointer to the file handle to read the PE/COFF image.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param FileOffset Offset into the PE/COFF image to begin the read operation.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param ReadSize On input, the size in bytes of the requested read operation.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync On output, the number of bytes actually read.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Buffer Output buffer that contains the data read from the PE/COFF image.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS The specified portion of the PE/COFF image was read and the size
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (FileHandle == NULL || ReadSize == NULL || Buffer == NULL) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync CopyMem (Buffer, (UINT8 *)((UINTN) FileHandle + FileOffset), *ReadSize);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Measure GPT table data into TPM log.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param TcgProtocol Pointer to the located TCG protocol instance.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param GptHandle Handle that GPT partition was installed.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS Successfully measure GPT table.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_UNSUPPORTED Not support GPT table on the given handle.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_DEVICE_ERROR Can't get GPT table because device error.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_OUT_OF_RESOURCES No enough resource to measure GPT table.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval other error value
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = gBS->HandleProtocol (GptHandle, &gEfiBlockIoProtocolGuid, (VOID**)&BlockIo);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = gBS->HandleProtocol (GptHandle, &gEfiDiskIoProtocolGuid, (VOID**)&DiskIo);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Read the EFI Partition Table Header
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync PrimaryHeader = (EFI_PARTITION_TABLE_HEADER *) AllocatePool (BlockIo->Media->BlockSize);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync DEBUG ((EFI_D_ERROR, "Failed to Read Partition Table Header!\n"));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Read the partition entry.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync EntryPtr = (UINT8 *)AllocatePool (PrimaryHeader->NumberOfPartitionEntries * PrimaryHeader->SizeOfPartitionEntry);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync MultU64x32(PrimaryHeader->PartitionEntryLBA, BlockIo->Media->BlockSize),
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync PrimaryHeader->NumberOfPartitionEntries * PrimaryHeader->SizeOfPartitionEntry,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Count the valid partition
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync for (Index = 0; Index < PrimaryHeader->NumberOfPartitionEntries; Index++) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (!CompareGuid (&PartitionEntry->PartitionTypeGUID, &mZeroGuid)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Parepare Data for Measurement
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync EventSize = (UINT32)(sizeof (EFI_GPT_DATA) - sizeof (GptData->Partitions)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync + NumberOfPartition * PrimaryHeader->SizeOfPartitionEntry);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync TcgEvent = (TCG_PCR_EVENT *) AllocateZeroPool (EventSize + sizeof (TCG_PCR_EVENT));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Copy the EFI_PARTITION_TABLE_HEADER and NumberOfPartition
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync CopyMem ((UINT8 *)GptData, (UINT8*)PrimaryHeader, sizeof (EFI_PARTITION_TABLE_HEADER));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Copy the valid partition entry
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync for (Index = 0; Index < PrimaryHeader->NumberOfPartitionEntries; Index++) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (!CompareGuid (&PartitionEntry->PartitionTypeGUID, &mZeroGuid)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync (UINT8 *)&GptData->Partitions + NumberOfPartition * sizeof (EFI_PARTITION_ENTRY),
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Measure the GPT data
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Measure PE image into TPM log based on the authenticode image hashing in
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync PE/COFF Specification 8.0 Appendix A.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param[in] TcgProtocol Pointer to the located TCG protocol instance.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param[in] ImageAddress Start address of image buffer.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param[in] ImageSize Image size
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param[in] LinkTimeBase Address that the image is loaded into memory.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param[in] ImageType Image subsystem type.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param[in] FilePath File path is corresponding to the input image.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS Successfully measure image.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_OUT_OF_RESOURCES No enough resource to measure image.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_UNSUPPORTED ImageType is unsupported or PE image is mal-format.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval other error value
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync FilePathSize = (UINT32) GetDevicePathSize (FilePath);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Determine destination PCR by BootPolicy
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync EventSize = sizeof (*ImageLoad) - sizeof (ImageLoad->DevicePath) + FilePathSize;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync TcgEvent = AllocateZeroPool (EventSize + sizeof (TCG_PCR_EVENT));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ImageLoad = (EFI_IMAGE_LOAD_EVENT *) TcgEvent->Event;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync TcgEvent->EventType = EV_EFI_BOOT_SERVICES_APPLICATION;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync TcgEvent->EventType = EV_EFI_RUNTIME_SERVICES_DRIVER;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync "TcgMeasurePeImage: Unknown subsystem type %d",
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync CopyMem (ImageLoad->DevicePath, FilePath, FilePathSize);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Check PE/COFF image
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync DosHdr = (EFI_IMAGE_DOS_HEADER *) (UINTN) ImageAddress;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINT8 *) (UINTN) ImageAddress + PeCoffHeaderOffset);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Hdr.Pe32->Signature != EFI_IMAGE_NT_SIGNATURE) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // PE/COFF Image Measurement
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // NOTE: The following codes/steps are based upon the authenticode image hashing in
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // PE/COFF Specification 8.0 Appendix A.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 1. Load the image header into memory.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 2. Initialize a SHA hash context.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Measuring PE/COFF Image Header;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // But CheckSum field and SECURITY data directory (certificate) are excluded
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 3. Calculate the distance from the base of the image header to the image checksum address.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 4. Hash the image header from its base to beginning of the image checksum.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Use PE32 offset
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync NumberOfRvaAndSizes = Hdr.Pe32->OptionalHeader.NumberOfRvaAndSizes;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashSize = (UINTN) ((UINT8 *)(&Hdr.Pe32->OptionalHeader.CheckSum) - HashBase);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Use PE32+ offset
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync NumberOfRvaAndSizes = Hdr.Pe32Plus->OptionalHeader.NumberOfRvaAndSizes;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashSize = (UINTN) ((UINT8 *)(&Hdr.Pe32Plus->OptionalHeader.CheckSum) - HashBase);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashStatus = Sha1Update (Sha1Ctx, HashBase, HashSize);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 5. Skip over the image checksum (it occupies a single ULONG).
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (NumberOfRvaAndSizes <= EFI_IMAGE_DIRECTORY_ENTRY_SECURITY) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 6. Since there is no Cert Directory in optional header, hash everything
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // from the end of the checksum to the end of image header.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Use PE32 offset.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashBase = (UINT8 *) &Hdr.Pe32->OptionalHeader.CheckSum + sizeof (UINT32);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashSize = Hdr.Pe32->OptionalHeader.SizeOfHeaders - (UINTN) (HashBase - ImageAddress);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Use PE32+ offset.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashBase = (UINT8 *) &Hdr.Pe32Plus->OptionalHeader.CheckSum + sizeof (UINT32);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashSize = Hdr.Pe32Plus->OptionalHeader.SizeOfHeaders - (UINTN) (HashBase - ImageAddress);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashStatus = Sha1Update (Sha1Ctx, HashBase, HashSize);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 7. Hash everything from the end of the checksum to the start of the Cert Directory.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Use PE32 offset
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashBase = (UINT8 *) &Hdr.Pe32->OptionalHeader.CheckSum + sizeof (UINT32);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashSize = (UINTN) ((UINT8 *)(&Hdr.Pe32->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_SECURITY]) - HashBase);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Use PE32+ offset
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashBase = (UINT8 *) &Hdr.Pe32Plus->OptionalHeader.CheckSum + sizeof (UINT32);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashSize = (UINTN) ((UINT8 *)(&Hdr.Pe32Plus->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_SECURITY]) - HashBase);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashStatus = Sha1Update (Sha1Ctx, HashBase, HashSize);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 8. Skip over the Cert Directory. (It is sizeof(IMAGE_DATA_DIRECTORY) bytes.)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 9. Hash everything from the end of the Cert Directory to the end of image header.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Use PE32 offset
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashBase = (UINT8 *) &Hdr.Pe32->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_SECURITY + 1];
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashSize = Hdr.Pe32->OptionalHeader.SizeOfHeaders - (UINTN) (HashBase - ImageAddress);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Use PE32+ offset
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashBase = (UINT8 *) &Hdr.Pe32Plus->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_SECURITY + 1];
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashSize = Hdr.Pe32Plus->OptionalHeader.SizeOfHeaders - (UINTN) (HashBase - ImageAddress);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashStatus = Sha1Update (Sha1Ctx, HashBase, HashSize);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 10. Set the SUM_OF_BYTES_HASHED to the size of the header
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Use PE32 offset
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync SumOfBytesHashed = Hdr.Pe32->OptionalHeader.SizeOfHeaders;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Use PE32+ offset
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync SumOfBytesHashed = Hdr.Pe32Plus->OptionalHeader.SizeOfHeaders;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 11. Build a temporary table of pointers to all the IMAGE_SECTION_HEADER
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // structures in the image. The 'NumberOfSections' field of the image
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // header indicates how big the table should be. Do not include any
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // IMAGE_SECTION_HEADERs in the table whose 'SizeOfRawData' field is zero.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync SectionHeader = (EFI_IMAGE_SECTION_HEADER *) AllocateZeroPool (sizeof (EFI_IMAGE_SECTION_HEADER) * Hdr.Pe32->FileHeader.NumberOfSections);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 12. Using the 'PointerToRawData' in the referenced section headers as
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // a key, arrange the elements in the table in ascending order. In other
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // words, sort the section headers according to the disk-file offset of
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // the section.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync for (Index = 0; Index < Hdr.Pe32->FileHeader.NumberOfSections; Index++) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync while ((Pos > 0) && (Section->PointerToRawData < SectionHeader[Pos - 1].PointerToRawData)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync CopyMem (&SectionHeader[Pos], &SectionHeader[Pos - 1], sizeof(EFI_IMAGE_SECTION_HEADER));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync CopyMem (&SectionHeader[Pos], Section, sizeof(EFI_IMAGE_SECTION_HEADER));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 13. Walk through the sorted table, bring the corresponding section
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // into memory, and hash the entire section (using the 'SizeOfRawData'
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // field in the section header to determine the amount of data to hash).
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 14. Add the section's 'SizeOfRawData' to SUM_OF_BYTES_HASHED .
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 15. Repeat steps 13 and 14 for all the sections in the sorted table.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync for (Index = 0; Index < Hdr.Pe32->FileHeader.NumberOfSections; Index++) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Section = (EFI_IMAGE_SECTION_HEADER *) &SectionHeader[Index];
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashBase = (UINT8 *) (UINTN) ImageAddress + Section->PointerToRawData;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashStatus = Sha1Update (Sha1Ctx, HashBase, HashSize);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 16. If the file size is greater than SUM_OF_BYTES_HASHED, there is extra
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // data in the file that needs to be added to the hash. This data begins
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // at file offset SUM_OF_BYTES_HASHED and its length is:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // FileSize - (CertDirectory->Size)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashBase = (UINT8 *) (UINTN) ImageAddress + SumOfBytesHashed;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (NumberOfRvaAndSizes <= EFI_IMAGE_DIRECTORY_ENTRY_SECURITY) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Use PE32 offset.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync CertSize = Hdr.Pe32->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_SECURITY].Size;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Use PE32+ offset.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync CertSize = Hdr.Pe32Plus->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_SECURITY].Size;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashSize = (UINTN) (ImageSize - CertSize - SumOfBytesHashed);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashStatus = Sha1Update (Sha1Ctx, HashBase, HashSize);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync } else if (ImageSize < CertSize + SumOfBytesHashed) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 17. Finalize the SHA hash.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HashStatus = Sha1Final (Sha1Ctx, (UINT8 *) &TcgEvent->Digest);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Log the PE data
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync The security handler is used to abstract platform-specific policy
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync from the DXE core response to an attempt to use a file that returns a
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync given status for the authentication check from the section extraction protocol.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync The possible responses in a given SAP implementation may include locking
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync flash upon failure to authenticate, attestation logging for all signed drivers,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync and other exception operations. The File parameter allows for possible logging
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync within the SAP of the driver.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If File is NULL, then EFI_INVALID_PARAMETER is returned.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If the file specified by File with an authentication status specified by
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync AuthenticationStatus is safe for the DXE Core to use, then EFI_SUCCESS is returned.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If the file specified by File with an authentication status specified by
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync AuthenticationStatus is not safe for the DXE Core to use under any circumstances,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync then EFI_ACCESS_DENIED is returned.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If the file specified by File with an authentication status specified by
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync AuthenticationStatus is not safe for the DXE Core to use right now, but it
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync might be possible to use it at a future time, then EFI_SECURITY_VIOLATION is
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param[in, out] AuthenticationStatus This is the authentication status returned
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync from the securitymeasurement services for the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync input file.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param[in] File This is a pointer to the device path of the file that is
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync being dispatched. This will optionally be used for logging.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param[in] FileBuffer File buffer matches the input file device path.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param[in] FileSize Size of File buffer matches the input file device path.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS The file specified by File did authenticate, and the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync platform policy dictates that the DXE Core may use File.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_INVALID_PARAMETER File is NULL.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SECURITY_VIOLATION The file specified by File did not authenticate, and
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync the platform policy dictates that File should be placed
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync in the untrusted state. A file may be promoted from
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync the untrusted to the trusted state at a future time
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync with a call to the Trust() DXE Service.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_ACCESS_DENIED The file specified by File did not authenticate, and
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync the platform policy dictates that File should not be
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync used for any purpose.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync TCG_EFI_BOOT_SERVICE_CAPABILITY ProtocolCapability;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = gBS->LocateProtocol (&gEfiTcgProtocolGuid, NULL, (VOID **) &TcgProtocol);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // TCG protocol is not installed. So, TPM is not present.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Don't do any measurement, and directly return EFI_SUCCESS.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ProtocolCapability.Size = (UINT8) sizeof (ProtocolCapability);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (EFI_ERROR (Status) || ProtocolCapability.TPMDeactivatedFlag) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // TPM device doesn't work or activate.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Copy File Device Path
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 1. Check whether this device path support BlockIo protocol.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Is so, this device path may be a GPT device path.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = gBS->LocateDevicePath (&gEfiBlockIoProtocolGuid, &DevicePathNode, &Handle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (!EFI_ERROR (Status) && !mMeasureGptTableFlag) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Find the gpt partion on the given devicepath
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Find the Gpt partition
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (DevicePathType (DevicePathNode) == MEDIA_DEVICE_PATH &&
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync DevicePathSubType (DevicePathNode) == MEDIA_HARDDRIVE_DP) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Check whether it is a gpt partition or not
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (((HARDDRIVE_DEVICE_PATH *) DevicePathNode)->MBRType == MBR_TYPE_EFI_PARTITION_TABLE_HEADER &&
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ((HARDDRIVE_DEVICE_PATH *) DevicePathNode)->SignatureType == SIGNATURE_TYPE_GUID) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Change the partition device path to its parent device path (disk) and get the handle.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync DevicePathNode->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Measure GPT disk.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // GPT disk check done.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync DevicePathNode = NextDevicePathNode (DevicePathNode);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 2. Measure PE image.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Check whether this device path support FV2 protocol.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = gBS->LocateDevicePath (&gEfiFirmwareVolume2ProtocolGuid, &DevicePathNode, &Handle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Don't check FV image, and directly return EFI_SUCCESS.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // It can be extended to the specific FV authentication according to the different requirement.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // The image from Firmware image will not be mearsured.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Current policy doesn't measure PeImage from Firmware if it is driver
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // If the got PeImage is application, it will be still be measured.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // File is not found.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Measure PE Image
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ImageContext.ImageRead = (PE_COFF_LOADER_READ_FILE) DxeTpmMeasureBootLibImageRead;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Get information about the image being loaded
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // The information can't be got from the invalid PeImage
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Measure only application if Application flag is set
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Measure drivers and applications if Application flag is not set
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync (ApplicationRequired && ImageContext.ImageType == EFI_IMAGE_SUBSYSTEM_EFI_APPLICATION)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Print the image path to be measured.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync DEBUG ((DEBUG_INFO, "The measured image path is %s.\n", ToText));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Measure PE image into TPM log.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Done, free the allocated resource.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Register the security handler to provide TPM measure boot service.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param ImageHandle ImageHandle of the loaded driver.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param SystemTable Pointer to the EFI System Table.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS Register successfully.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_OUT_OF_RESOURCES No enough memory to register this handler.