# File type specifications ## PDF **Specification Validated Against:** - PDF Reference (third edition) Adobe Portable Document Format Version 1.7. **Note:** Glasswall supports PDF Reference (third edition) Adobe Portable Document Format from Version 1.3. ## Images There are no content management switches for any of the image file formats. Images embedded in a document that do not conform to the specification will result in the original document being quarantined. ### JPEG **Specification Validated Against:** - JPEG File Interchange Format, Version 1.02 September 1, 1992 - JP2 for ISO/IEC 15444-1 (JPEG 2000) - JPX for ISO/IEC 15444-2 (JPEG 2000) ### GIF **Specification Validated Against:** - Graphics Interchange Format, Version GIF 87a - Graphics Interchange Format, Version GIF 89a ### PNG **Specification Validated Against:** - Portable Network Graphics (PNG): Functional specification. ISO/IEC 15948:2003 (E) ### EMF **Specification Validated Against:** - [MS-EMF]: Enhanced Metafile Format: Open Specifications Documentation. v20151016 - [MS-EMFPLUS]: Enhanced Metafile Format Plus Extensions: Open Specifications Documentation. V20121017 ### WMF **Specification Validated Against:** - [MS-WMF]: Windows Metafile Format: Open Specifications Documentation. v20121017 ### TIFF and GeoTIFF **Specification Validated Against:** - TIFF 6.0 Specification: Final – June 3, 1992 - GeoTIFF Format Specification - Specification Version: 1.8.1 ### BMP **Specification Validated Against:** - BMP is covered by the WMF file specification. ## Binary Office ### Processing specific to Binary Office in Protect mode - The content management switch `GWFILE_MANAGE_REMOVE_MACROS` when set to **sanitise** in Protect mode removes the VBA script from the regenerated file but copies over the macro container. This can give the impression that the macros have not been deleted. - The content management switch `GWFILE_MANAGE_REMOVE_EMBEDDED_FILES` when set to **sanitise** in Protect mode follows these rules: 1. If the embedded file is supported by Glasswall, it will be processed as a standalone file, including its own configuration management policies. If it can be regenerated, it will be re-embedded; otherwise, the parent file will be marked as non-conforming. 2. If the embedded file is **not** supported (e.g., .mdb or .dat files), it will be removed. - Embedded files are validated to five levels deep. ## DOC **Specifications Validated Against:** - [MS-DOC]: Word (.doc) Binary File Format - Microsoft Corporation, 2011, v20121003 to [MS-DOC]: Word (.doc) Binary File Format - Corporation, 2017, v20170112 - Office Common Data Types and Objects Structure Specification - Microsoft Corporation, 2011, v20110608 - Office Document Cryptography Structure Specification - Microsoft Corporation, 2011, v20110608 - Office VBA File Format Structure Specification - Microsoft Corporation, 2011, v20110608 **Non-Supported Specifications:** - Word 95 and earlier versions (Word 1 to Word 6) are not supported. Processing these file types will result in an issue being reported in the XML report in **Analysis mode** and the file **not being regenerated** in **Protect mode**. - Word files containing Apple Mac or LibreOffice-specific file features will be marked as non-conformant. ## XLS **Specifications Validated Against:** - [MS-XLS]: Excel Binary File Format (.xls) Structure Specification - Microsoft Corporation, v20141018 to v20161017. - Spreadsheet Data Model File Format - Office Graph Binary File Format v20141019 **Non-Supported Specifications:** - Excel 95 and earlier versions are not supported. Processing these file types will result in an issue being reported in the XML report in **Analysis mode** and the file **not being regenerated** in **Protect mode**. - Excel files containing Apple Mac or LibreOffice-specific file features will be marked as non-conformant. ## PPT **Specifications Validated Against:** - [MS-PPT]: PowerPoint (.ppt) Binary File Format - Microsoft Corporation, v20121003 to v20160922. **Non-Supported Specifications:** - PowerPoint 95 and earlier versions are not supported. Processing these file types will result in an issue being reported in the XML report in **Analysis mode** and the file **not being regenerated** in **Protect mode**. - PowerPoint files containing Apple Mac or LibreOffice-specific file features will be marked as non-conformant. ## XML Office ### Processing specific to XML Office in Protect mode - If an XML Office file has another XML Office file embedded inside it and the `GWFILE_MANAGE_REMOVE_EMBEDDED_FILES` is set to **sanitise**, the embedded file will be **removed** when a new file is regenerated. - Office XML files are stored as **zipped archives**. If the zipped file is less than 10MB, when extracted, an individual stream exceeding 10MB: - **32-bit DLL:** The file is marked as **non-conforming** and will not be processed further. - **64-bit DLL:** Streams up to **50MB** are processed. ## Office 2010 **Specifications Validated Against:** - [ECMA-376 5th edition Part 1](https://ecma-international.org/wp-content/uploads/ECMA-376-1_5th_edition_december_2016.zip) - [ECMA-376 5th edition Part 2](https://ecma-international.org/wp-content/uploads/ECMA-376-2_5th_edition_december_2021.zip) - [ECMA-376 5th edition Part 3](https://ecma-international.org/wp-content/uploads/ECMA-376-3_5th_edition_december_2015.zip) - [ECMA-376 5th edition Part 4](https://ecma-international.org/wp-content/uploads/ECMA-376-4_5th_edition_december_2016.zip) ## Office 2013 **Specifications Validated Against:** - Word (.docx) Extensions to the Office Open XML SpreadsheetML File Format - Excel (.xlsx) Extensions to the Office Open XML SpreadsheetML File Format - PowerPoint (.pptx) Extensions to the Office Open XML SpreadsheetML File Format - Office Drawing Extensions to the Office Open XML Structure **Non-Supported Specifications:** - Office 2010 or Office 2013 files containing Apple Mac or LibreOffice-specific file features may be marked as **non-conformant** or the components may be **removed** from the file. ## Other ### WAV **Specifications Validated Against:** - Multimedia Programming Interface and Data Specifications 1.0 August 1991. ### MPG **Specifications Validated Against:** - ISO/IEC 13818-1:2000(E). Second edition 2000-12-01 ### MP3 **Specifications Validated Against:** - MPEG Layer III audio encoding is defined in two ISO/IEC specification families: - **MPEG-1:** ISO/IEC 11172-3 - **MPEG-2:** ISO/IEC 13818-3 ### MP4 **Specifications Validated Against:** - ISO/IEC 14496-12:2005(E). Part 12: Corrected version 2005-10-01. ### PE and COFF **Specifications Validated Against:** - Microsoft Portable Executable and Common Object File Format Specification Revision 6.0 – February 1999. ### ELF **Specifications Validated Against:** - Tool Interface Standard (TIS) Executable and Linking Format (ELF) Specification Version 1.2. May 1995 - ELF-64 Object File Format Version 1.2 Draft 2. May 27, 1998. ### Mach-O **Specifications Validated Against:** - OS X ABI Mach-O File Format Reference. 2009-02-04.