48 lines
2.1 KiB
Plaintext
48 lines
2.1 KiB
Plaintext
|
|
#------------------------------------------------------------------------------
|
|
# $File: msooxml,v 1.13 2019/11/27 13:12:55 christos Exp $
|
|
# msooxml: file(1) magic for Microsoft Office XML
|
|
# From: Ralf Brown <ralf.brown@gmail.com>
|
|
|
|
# .docx, .pptx, and .xlsx are XML plus other files inside a ZIP
|
|
# archive. The first member file is normally "[Content_Types].xml".
|
|
# but some libreoffice generated files put this later. Perhaps skip
|
|
# the "[Content_Types].xml" test?
|
|
# Since MSOOXML doesn't have anything like the uncompressed "mimetype"
|
|
# file of ePub or OpenDocument, we'll have to scan for a filename
|
|
# which can distinguish between the three types
|
|
|
|
0 name msooxml
|
|
>0 string word/ Microsoft Word 2007+
|
|
!:mime application/vnd.openxmlformats-officedocument.wordprocessingml.document
|
|
>0 string ppt/ Microsoft PowerPoint 2007+
|
|
!:mime application/vnd.openxmlformats-officedocument.presentationml.presentation
|
|
>0 string xl/ Microsoft Excel 2007+
|
|
!:mime application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
|
|
0 string visio/ Microsoft Visio 2013+
|
|
!:mime application/vnd.ms-visio.drawing.main+xml
|
|
|
|
# start by checking for ZIP local file header signature
|
|
0 string PK\003\004
|
|
!:strength +10
|
|
# make sure the first file is correct
|
|
>0x1E use msooxml
|
|
>0x1E regex \\[Content_Types\\]\\.xml|_rels/\\.rels|docProps
|
|
# skip to the second local file header
|
|
# since some documents include a 520-byte extra field following the file
|
|
# header, we need to scan for the next header
|
|
>>(18.l+49) search/6000 PK\003\004
|
|
# now skip to the *third* local file header; again, we need to scan due to a
|
|
# 520-byte extra field following the file header
|
|
>>>&26 search/6000 PK\003\004
|
|
# and check the subdirectory name to determine which type of OOXML
|
|
# file we have. Correct the mimetype with the registered ones:
|
|
# https://technet.microsoft.com/en-us/library/cc179224.aspx
|
|
>>>>&26 use msooxml
|
|
>>>>&26 default x
|
|
# OpenOffice/Libreoffice orders ZIP entry differently, so check the 4th file
|
|
>>>>>&26 search/6000 PK\003\004
|
|
>>>>>>&26 use msooxml
|
|
>>>>>>&26 default x Microsoft OOXML
|
|
>>>>>&26 default x Microsoft OOXML
|