diff options
| -rw-r--r-- | SecurityPkg/Tcg/Tcg2Dxe/MeasureBootPeCoff.c | 72 | ||||
| -rw-r--r-- | SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.c | 2 | ||||
| -rw-r--r-- | SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.inf | 1 |
3 files changed, 74 insertions, 1 deletions
diff --git a/SecurityPkg/Tcg/Tcg2Dxe/MeasureBootPeCoff.c b/SecurityPkg/Tcg/Tcg2Dxe/MeasureBootPeCoff.c index e2d763a548..de55ed9923 100644 --- a/SecurityPkg/Tcg/Tcg2Dxe/MeasureBootPeCoff.c +++ b/SecurityPkg/Tcg/Tcg2Dxe/MeasureBootPeCoff.c @@ -6,7 +6,7 @@ This external input must be validated carefully to avoid security issue like
buffer overflow, integer overflow.
-Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -29,6 +29,56 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. #include <Library/Tpm2CommandLib.h>
#include <Library/HashLib.h>
+UINTN mTcg2DxeImageSize = 0;
+
+/**
+ Reads contents of a PE/COFF image in memory buffer.
+
+ Caution: This function may receive untrusted input.
+ PE/COFF image is external input, so this function will make sure the PE/COFF image content
+ read is within the image buffer.
+
+ @param FileHandle Pointer to the file handle to read the PE/COFF image.
+ @param FileOffset Offset into the PE/COFF image to begin the read operation.
+ @param ReadSize On input, the size in bytes of the requested read operation.
+ On output, the number of bytes actually read.
+ @param Buffer Output buffer that contains the data read from the PE/COFF image.
+
+ @retval EFI_SUCCESS The specified portion of the PE/COFF image was read and the size
+**/
+EFI_STATUS
+EFIAPI
+Tcg2DxeImageRead (
+ IN VOID *FileHandle,
+ IN UINTN FileOffset,
+ IN OUT UINTN *ReadSize,
+ OUT VOID *Buffer
+ )
+{
+ UINTN EndPosition;
+
+ if (FileHandle == NULL || ReadSize == NULL || Buffer == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (MAX_ADDRESS - FileOffset < *ReadSize) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ EndPosition = FileOffset + *ReadSize;
+ if (EndPosition > mTcg2DxeImageSize) {
+ *ReadSize = (UINT32)(mTcg2DxeImageSize - FileOffset);
+ }
+
+ if (FileOffset >= mTcg2DxeImageSize) {
+ *ReadSize = 0;
+ }
+
+ CopyMem (Buffer, (UINT8 *)((UINTN) FileHandle + FileOffset), *ReadSize);
+
+ return EFI_SUCCESS;
+}
+
/**
Measure PE image into TPM log based on the authenticode image hashing in
PE/COFF Specification 8.0 Appendix A.
@@ -37,6 +87,8 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. PE/COFF image is external input, so this function will validate its data structure
within this image buffer before use.
+ Notes: PE/COFF image is checked by BasePeCoffLib PeCoffLoaderGetImageInfo().
+
@param[in] PCRIndex TPM PCR index
@param[in] ImageAddress Start address of image buffer.
@param[in] ImageSize Image size
@@ -69,6 +121,7 @@ MeasurePeImageAndExtend ( UINT32 NumberOfRvaAndSizes;
UINT32 CertSize;
HASH_HANDLE HashHandle;
+ PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;
HashHandle = 0xFFFFFFFF; // Know bad value
@@ -78,6 +131,23 @@ MeasurePeImageAndExtend ( //
// Check PE/COFF image
//
+ ZeroMem (&ImageContext, sizeof (ImageContext));
+ ImageContext.Handle = (VOID *) (UINTN) ImageAddress;
+ mTcg2DxeImageSize = ImageSize;
+ ImageContext.ImageRead = (PE_COFF_LOADER_READ_FILE) Tcg2DxeImageRead;
+
+ //
+ // Get information about the image being loaded
+ //
+ Status = PeCoffLoaderGetImageInfo (&ImageContext);
+ if (EFI_ERROR (Status)) {
+ //
+ // The information can't be got from the invalid PeImage
+ //
+ DEBUG ((DEBUG_INFO, "Tcg2Dxe: PeImage invalid. Cannot retrieve image information.\n"));
+ goto Finish;
+ }
+
DosHdr = (EFI_IMAGE_DOS_HEADER *) (UINTN) ImageAddress;
PeCoffHeaderOffset = 0;
if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {
diff --git a/SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.c b/SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.c index 7720c2708d..95219c0fca 100644 --- a/SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.c +++ b/SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.c @@ -127,6 +127,8 @@ EFI_HANDLE mImageHandle; PE/COFF image is external input, so this function will validate its data structure
within this image buffer before use.
+ Notes: PE/COFF image is checked by BasePeCoffLib PeCoffLoaderGetImageInfo().
+
@param[in] PCRIndex TPM PCR index
@param[in] ImageAddress Start address of image buffer.
@param[in] ImageSize Image size
diff --git a/SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.inf b/SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.inf index fd120e5538..6b4c15ffdd 100644 --- a/SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.inf +++ b/SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.inf @@ -59,6 +59,7 @@ PerformanceLib
ReportStatusCodeLib
Tcg2PhysicalPresenceLib
+ PeCoffLib
[Guids]
## SOMETIMES_CONSUMES ## Variable:L"SecureBoot"
|