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SecurityPkg/SecureBootConfigDxe: Fix deleting signature data issue. 

Replace "(UINT8 *)NewVariableData" with (UINT8 *)NewVariableData + Offset"
to avoid the header of EFI_SIGNATURE_LIST being copied to the front of
NewVariableData every time and update ListWalker when handling the current
EFI_SIGNATURE_LIST finishes.

Cc: Zhang Chao <chao.b.zhang@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: chenc2 <chen.a.chen@intel.com>
Reviewed-by: Zhang Chao <chao.b.zhang@intel.com>
This commit is contained in:
chenc2 2017-11-20 15:34:17 +08:00 committed by Zhang, Chao B
parent fc82cfc24c
commit c3cb333e09
1 changed files with 13 additions and 7 deletions
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18
SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigImpl.c
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@ -3145,6 +3145,9 @@ DeleteSignatureEx (
if (DelType == Delete_Signature_List_All) {
VariableDataSize = 0;
} else {
//
// Traverse to target EFI_SIGNATURE_LIST but others will be skipped.
//
while ((RemainingSize > 0) && (RemainingSize >= ListWalker->SignatureListSize) && ListIndex < PrivateData->ListIndex) {
CopyMem ((UINT8 *)NewVariableData + Offset, ListWalker, ListWalker->SignatureListSize);
Offset += ListWalker->SignatureListSize;
@ -3154,15 +3157,17 @@ DeleteSignatureEx (
ListIndex++;
}
if (CheckedCount == SIGNATURE_DATA_COUNTS (ListWalker) || DelType == Delete_Signature_List_One) {
RemainingSize -= ListWalker->SignatureListSize;
ListWalker = (EFI_SIGNATURE_LIST *)((UINT8 *)ListWalker + ListWalker->SignatureListSize);
} else {
//
// Handle the target EFI_SIGNATURE_LIST.
// If CheckedCount == SIGNATURE_DATA_COUNTS (ListWalker) or DelType == Delete_Signature_List_One
// it means delete the whole EFI_SIGNATURE_LIST, So we just skip this EFI_SIGNATURE_LIST.
//
if (CheckedCount < SIGNATURE_DATA_COUNTS (ListWalker) && DelType == Delete_Signature_Data) {
NewCertList = (EFI_SIGNATURE_LIST *)(NewVariableData + Offset);
//
// Copy header.
//
CopyMem ((UINT8 *)NewVariableData, ListWalker, sizeof (EFI_SIGNATURE_LIST) + ListWalker->SignatureHeaderSize);
CopyMem ((UINT8 *)NewVariableData + Offset, ListWalker, sizeof (EFI_SIGNATURE_LIST) + ListWalker->SignatureHeaderSize);
Offset += sizeof (EFI_SIGNATURE_LIST) + ListWalker->SignatureHeaderSize;
DataWalker = (EFI_SIGNATURE_DATA *)((UINT8 *)ListWalker + sizeof(EFI_SIGNATURE_LIST) + ListWalker->SignatureHeaderSize);
@ -3181,9 +3186,10 @@ DeleteSignatureEx (
}
DataWalker = (EFI_SIGNATURE_DATA *)((UINT8 *)DataWalker + ListWalker->SignatureSize);
}
}
RemainingSize -= ListWalker->SignatureListSize;
}
ListWalker = (EFI_SIGNATURE_LIST *)((UINT8 *)ListWalker + ListWalker->SignatureListSize);
//
// Copy remaining data, maybe 0.