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Update PeiCore and DxeCore to verify FFS data checksum.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11332 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
lgao4
2011-02-23 03:09:55 +00:00
parent 59424fff04
commit 89cd8129f7
2 changed files with 21 additions and 5 deletions
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15
MdeModulePkg/Core/Dxe/FwVol/Ffs.c
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@@ -217,6 +217,8 @@ IsValidFfsFile (
)
{
EFI_FFS_FILE_STATE FileState;
UINT8 DataCheckSum;
UINT32 FileLength;
FileState = GetFileState (ErasePolarity, FfsHeader);
switch (FileState) {
@@ -224,11 +226,14 @@ IsValidFfsFile (
case EFI_FILE_DELETED:
case EFI_FILE_DATA_VALID:
case EFI_FILE_MARKED_FOR_UPDATE:
//
// Some other vliadation like file content checksum might be done here.
// For performance issue, Tiano only do FileState check.
//
return TRUE;
DataCheckSum = FFS_FIXED_CHECKSUM;
FileLength = *(UINT32 *)(FfsHeader->Size) & 0x00FFFFFF;
if ((FfsHeader->Attributes & FFS_ATTRIB_CHECKSUM) == FFS_ATTRIB_CHECKSUM) {
DataCheckSum = CalculateCheckSum8 ((CONST UINT8 *)FfsHeader + sizeof(EFI_FFS_FILE_HEADER), FileLength - sizeof(EFI_FFS_FILE_HEADER));
}
if (FfsHeader->IntegrityCheck.Checksum.File == DataCheckSum) {
return TRUE;
}
default:
return FALSE;