#------------------------------------------------------------------------------ # $File: msooxml,v 1.7 2018/03/12 12:38:59 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 # start by checking for ZIP local file header signature 0 string PK\003\004 !:strength +10 # make sure the first file is correct >0x1E regex \\[Content_Types\\]\\.xml|_rels/\\.rels # 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/2000 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/1000 PK\003\004 # and check the subdirectory name to determine which type of OOXML # file we have. Correct the mimetype with the registered ones: # http://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/1000 PK\003\004 >>>>>>&26 use msooxml >>>>>>&26 default x Microsoft OOXML