1 2#------------------------------------------------------------------------------ 3# $File: msooxml,v 1.23 2024/07/19 18:48:23 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 30# start by checking for ZIP local file header signature 310 string PK\003\004 32!:strength +10 33# make sure the first file is correct 34>0x1E use msooxml 35>0x1E default x 36>>0x1E regex \\[Content_Types\\]\\.xml|_rels/\\.rels|docProps|customXml 37# skip to the second local file header 38# since some documents include a 520-byte extra field following the file 39# header, we need to scan for the next header 40>>>(18.l+49) search/6000 PK\003\004 41>>>>&26 use msooxml 42>>>>&26 default x 43# now skip to the *third* local file header; again, we need to scan due to a 44# 520-byte extra field following the file header 45>>>>>&26 search/6000 PK\003\004 46# and check the subdirectory name to determine which type of OOXML 47# file we have. Correct the mimetype with the registered ones: 48# https://technet.microsoft.com/en-us/library/cc179224.aspx 49>>>>>>&26 use msooxml 50>>>>>>&26 default x 51# OpenOffice/Libreoffice orders ZIP entry differently, so check the 4th file 52>>>>>>>&26 search/6000 PK\003\004 53>>>>>>>>&26 use msooxml 54# Some OOXML generators add an extra customXml directory. Check another file. 55>>>>>>>>&26 default x 56>>>>>>>>>&26 search/6000 PK\003\004 57>>>>>>>>>>&26 use msooxml 58>>>>>>>>>>&26 default x 59>>>>>>>>>>>&26 search/6000 PK\003\004 60>>>>>>>>>>>>&26 use msooxml 61>>>>>>>>>>>>&26 default x Microsoft OOXML 62>>>>>>>>>>>&26 default x Microsoft OOXML 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>>0x1E regex \\[trash\\] 69>>>&26 search/6000 PK\003\004 70>>>>&26 search/6000 PK\003\004 71>>>>>&26 use msooxml 72>>>>>&26 default x 73>>>>>>&26 search/6000 PK\003\004 74>>>>>>>&26 use msooxml 75>>>>>>>&26 default x Microsoft OOXML 76>>>>>>&26 default x Microsoft OOXML 77>>>>>&26 default x Microsoft OOXML 78