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validate dwHashTableSize

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- dwHashTableSize must be a power of two, otherwise HASH_INDEX_MASK does not work
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pionere
2025-03-01 13:02:16 +01:00
parent 17afc22d0a
commit ac9be1ae60
1 changed files with 5 additions and 0 deletions
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5
src/SBaseFileTable.cpp
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@@ -2560,7 +2560,12 @@ DWORD LoadAnyHashTable(TMPQArchive * ha)
// Note that we load the classic hash table even when HET table exists,
// because if the MPQ gets modified and saved, hash table must be there
if(pHeader->dwHashTableSize)
{
// hash-table size must be a power or 2
if ((pHeader->dwHashTableSize & (pHeader->dwHashTableSize - 1)) != 0)
return ERROR_FILE_CORRUPT;
ha->pHashTable = LoadHashTable(ha);
}
// At least one of the tables must be present
if(ha->pHetTable == NULL && ha->pHashTable == NULL)