[Libreoffice-bugs] [Bug 144732] [FILEOPEN] Missing content from bare BIFF8 XLS Files

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=144732

Mike Kaganski <mikekaganski at hotmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |erack at redhat.com

--- Comment #2 from Mike Kaganski <mikekaganski at hotmail.com> ---
The file is indeed not a proper BIFF8 file as described in [MS-XLS]. The
documentation requires (2.1.1 Compound File) that "A file of the type specified
by this document MUST be an OLE compound file as specified in [MS-CFB]".

The latter documentation requires (2.2 Compound File Header):

> The Compound File Header structure MUST be at the beginning of the file (offset 0).
> ...
> Header Signature (8 bytes): Identification signature for the compound file structure,
and MUST be set to the value 0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1.

Attachment 175276 starts with 0x09 0x08 0x08 0x00, is it some separate record
of BIFF? Is there a specification regarding such partial files somewhere?

[MS-XLS]
https://docs.microsoft.com/en-us/openspecs/office_file_formats/ms-xls/cd03cb5f-ca02-4934-a391-bb674cb8aa06
[MS-CFB]
https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-cfb/53989ce4-7b05-4f8d-829b-d08d6148375b

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