2 #------------------------------------------------------------------------------
3 # $File: msooxml,v 1.12 2019/04/19 00:42:27 christos Exp $
4 # msooxml: file(1) magic for Microsoft Office XML
5 # From: Ralf Brown <ralf.brown@gmail.com>
7 # .docx, .pptx, and .xlsx are XML plus other files inside a ZIP
8 # archive. The first member file is normally "[Content_Types].xml".
9 # but some libreoffice generated files put this later. Perhaps skip
10 # the "[Content_Types].xml" test?
11 # Since MSOOXML doesn't have anything like the uncompressed "mimetype"
12 # file of ePub or OpenDocument, we'll have to scan for a filename
13 # which can distinguish between the three types
16 >0 string word/ Microsoft Word 2007+
17 !:mime application/vnd.openxmlformats-officedocument.wordprocessingml.document
18 >0 string ppt/ Microsoft PowerPoint 2007+
19 !:mime application/vnd.openxmlformats-officedocument.presentationml.presentation
20 >0 string xl/ Microsoft Excel 2007+
21 !:mime application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
23 # start by checking for ZIP local file header signature
26 # make sure the first file is correct
28 >0x1E regex \\[Content_Types\\]\\.xml|_rels/\\.rels|docProps
29 # skip to the second local file header
30 # since some documents include a 520-byte extra field following the file
31 # header, we need to scan for the next header
32 >>(18.l+49) search/6000 PK\003\004
33 # now skip to the *third* local file header; again, we need to scan due to a
34 # 520-byte extra field following the file header
35 >>>&26 search/6000 PK\003\004
36 # and check the subdirectory name to determine which type of OOXML
37 # file we have. Correct the mimetype with the registered ones:
38 # https://technet.microsoft.com/en-us/library/cc179224.aspx
41 # OpenOffice/Libreoffice orders ZIP entry differently, so check the 4th file
42 >>>>>&26 search/6000 PK\003\004
44 >>>>>>&26 default x Microsoft OOXML
45 >>>>>&26 default x Microsoft OOXML