1 2#------------------------------------------------------------------------------ 3# $File: msooxml,v 1.24 2025/05/29 15:03:04 christos Exp $ 4# msooxml: file(1) magic for Microsoft Office XML 5# From: Ralf Brown <ralf.brown@gmail.com> 6 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 14 150 name msooxml 16>0 string word/ Microsoft Word 2007+ 17!:mime application/vnd.openxmlformats-officedocument.wordprocessingml.document 18!:ext docx 19>0 string ppt/ Microsoft PowerPoint 2007+ 20!:mime application/vnd.openxmlformats-officedocument.presentationml.presentation 21!:ext pptx 22>0 string xl/ Microsoft Excel 2007+ 23!:mime application/vnd.openxmlformats-officedocument.spreadsheetml.sheet 24!:ext xlsx 25>0 string visio/ Microsoft Visio 2013+ 26!:mime application/vnd.ms-visio.drawing.main+xml 27>0 string AppManifest.xaml Microsoft Silverlight Application 28!:mime application/x-silverlight-app 29>0 search/100 .nuspec NuGet package 30!:mime application/vnd.nuget.package 31 32# start by checking for ZIP local file header signature 330 string PK\003\004 34!:strength +10 35# make sure the first file is correct 36>0x1E use msooxml 37>0x1E default x 38>>0x1E regex \\[Content_Types\\]\\.xml|_rels/\\.rels|docProps|customXml|.*\\.md|.*\\.png 39# skip to the second local file header 40# since some documents include a 520-byte extra field following the file 41# header, we need to scan for the next header 42>>>&26 search/10000 PK\003\004 43>>>>&26 use msooxml 44>>>>&26 default x 45# now skip to the *third* local file header; again, we need to scan due to a 46# 520-byte extra field following the file header 47>>>>>&26 search/10000 PK\003\004 48# and check the subdirectory name to determine which type of OOXML 49# file we have. Correct the mimetype with the registered ones: 50# https://technet.microsoft.com/en-us/library/cc179224.aspx 51>>>>>>&26 use msooxml 52>>>>>>&26 default x 53# OpenOffice/Libreoffice orders ZIP entry differently, so check the 4th file 54>>>>>>>&26 search/10000 PK\003\004 55>>>>>>>>&26 use msooxml 56# Some OOXML generators add an extra customXml directory. Check another file. 57>>>>>>>>&26 default x 58>>>>>>>>>&26 search/10000 PK\003\004 59>>>>>>>>>>&26 use msooxml 60>>>>>>>>>>&26 default x 61>>>>>>>>>>>&26 search/10000 PK\003\004 62>>>>>>>>>>>>&26 use msooxml 63>>>>>>>>>>>>&26 default x Microsoft OOXML 64>>>>>>>>>>>&26 default x Microsoft OOXML 65>>>>>>>>>>&26 default x Microsoft OOXML 66>>>>>>>>>&26 default x Microsoft OOXML 67>>>>>>>>&26 default x Microsoft OOXML 68>>>>>>>&26 default x Microsoft OOXML 69>>>>>>&26 default x Microsoft OOXML 70>>0x1E regex \\[trash\\] 71>>>&26 search/10000 PK\003\004 72>>>>&26 search/10000 PK\003\004 73>>>>>&26 use msooxml 74>>>>>&26 default x 75>>>>>>&26 search/10000 PK\003\004 76>>>>>>>&26 use msooxml 77>>>>>>>&26 default x Microsoft OOXML 78>>>>>>&26 default x Microsoft OOXML 79>>>>>&26 default x Microsoft OOXML 80