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Windows: Add an SDK for VeraCrypt Format that allows third-party application to create volumes

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This commit is contained in:
Mounir IDRASSI
2025-06-13 21:12:14 +09:00
parent 1ed5225971
commit 2b531dd113
17 changed files with 1241 additions and 139 deletions
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src/Format/InPlace.c
-33
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@@ -2177,39 +2177,6 @@ BOOL SaveNonSysInPlaceEncSettings (int delta, WipeAlgorithmId newWipeAlgorithm,
return SaveBufferToFile (str, GetConfigPath (TC_APPD_FILENAME_NONSYS_INPLACE_ENC), (DWORD) strlen(str), FALSE, FALSE);
}
// This function moves the file pointer to the given offset. It first retrieves the current
// file position using SetFilePointerEx() with FILE_CURRENT as the reference point, and then
// calculates the difference between the current position and the desired position. Subsequently,
// it moves the file pointer by the difference calculated using SetFilePointerEx() again.
//
// This approach of moving the file pointer relatively (instead of absolutely) was implemented
// as a workaround to address the performance issues related to in-place encryption. When using
// SetFilePointerEx() with FILE_BEGIN as the reference point, reaching the end of large drives
// during in-place encryption can cause significant slowdowns. By moving the file pointer
// relatively, these performance issues are mitigated.
//
// We fall back to absolute positioning if the relative positioning fails.
BOOL MoveFilePointer (HANDLE dev, LARGE_INTEGER offset)
{
LARGE_INTEGER currOffset;
LARGE_INTEGER diffOffset;
currOffset.QuadPart = 0;
if (SetFilePointerEx (dev, currOffset, &currOffset, FILE_CURRENT))
{
diffOffset.QuadPart = offset.QuadPart - currOffset.QuadPart;
if (diffOffset.QuadPart == 0)
return TRUE;
// Moves the file pointer by the difference between current and desired positions
if (SetFilePointerEx (dev, diffOffset, NULL, FILE_CURRENT))
return TRUE;
}
// An error occurred, fallback to absolute positioning
return SetFilePointerEx (dev, offset, NULL, FILE_BEGIN);
}
// Repairs damaged sectors (i.e. those with read errors) by zeroing them.
// Note that this operating fails if there are any write errors.
int ZeroUnreadableSectors (HANDLE dev, LARGE_INTEGER startOffset, int64 size, int sectorSize, uint64 *zeroedSectorCount)