
#------------------------------------------------------------------------------
# $File: msooxml,v 1.24 2025/05/29 15:03:04 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
!:ext	docx
>0		string		ppt/		Microsoft PowerPoint 2007+
!:mime application/vnd.openxmlformats-officedocument.presentationml.presentation
!:ext	pptx
>0		string		xl/		Microsoft Excel 2007+
!:mime application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
!:ext	xlsx
>0		string		visio/		Microsoft Visio 2013+
!:mime application/vnd.ms-visio.drawing.main+xml
>0		string		AppManifest.xaml	Microsoft Silverlight Application
!:mime application/x-silverlight-app
>0		search/100	.nuspec		NuGet package
!:mime application/vnd.nuget.package

# 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		default		x
>>0x1E		regex		\\[Content_Types\\]\\.xml|_rels/\\.rels|docProps|customXml|.*\\.md|.*\\.png
# 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
>>>&26		search/10000	PK\003\004
>>>>&26		use		msooxml
>>>>&26		default		x
# 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/10000	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/10000	PK\003\004
>>>>>>>>&26	use		msooxml
# Some OOXML generators add an extra customXml directory. Check another file.
>>>>>>>>&26	default		x
>>>>>>>>>&26	search/10000	PK\003\004
>>>>>>>>>>&26	use		msooxml
>>>>>>>>>>&26	default		x
>>>>>>>>>>>&26	search/10000	PK\003\004
>>>>>>>>>>>>&26	use		msooxml
>>>>>>>>>>>>&26	default		x		Microsoft OOXML
>>>>>>>>>>>&26	default		x		Microsoft OOXML
>>>>>>>>>>&26	default		x		Microsoft OOXML
>>>>>>>>>&26	default		x		Microsoft OOXML
>>>>>>>>&26	default		x		Microsoft OOXML
>>>>>>>&26	default		x		Microsoft OOXML
>>>>>>&26	default		x		Microsoft OOXML
>>0x1E		regex		\\[trash\\]
>>>&26		search/10000	PK\003\004
>>>>&26		search/10000	PK\003\004
>>>>>&26	use		msooxml
>>>>>&26	default		x
>>>>>>&26	search/10000	PK\003\004
>>>>>>>&26	use		msooxml
>>>>>>>&26	default		x		Microsoft OOXML
>>>>>>&26	default		x		Microsoft OOXML
>>>>>&26	default		x		Microsoft OOXML
