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Subject: RE: [office] Signing documents and changes

It's generally not possible to reject changes and somehow have the signature of the document that was the base for changes work on the result.  

The change-tracked document version won't have the original signature in its package -- no OpenOffice-lineage implementation will do that.  Generally, no META-INF/documentsignatures.xml is carried forward into an altered document.  If it is, the signature will be declared unverifiable on loading into a signature-aware consumer.  The document can be opened anyhow, of course, but a save of the file will not have any META-INF/documentsignatures.xml signature unless a new signing is done.

Also, because the package with changes rejected will be different that the original in various signature-relevant ways, it doesn't work to try to splice the original META-INF/documentsignatures.xml back in either.  And, of course, if that file is still available, so should be the complete signed version [;<).

-----Original Message-----
From: office@lists.oasis-open.org [mailto:office@lists.oasis-open.org] On Behalf Of Patrick Durusau
Sent: Monday, February 27, 2012 08:45
To: 'ODF TC List'
Subject: [office] Signing documents and changes


Interesting discussion about signing documents and change tracking this 

Question: Is it possible to back out changes so that an original 
signature is valid against the document without changes?

Just curious.

Hope everyone is having a great day!


Patrick Durusau
Chair, V1 - US TAG to JTC 1/SC 34
Convener, JTC 1/SC 34/WG 3 (Topic Maps)
Editor, OpenDocument Format TC (OASIS), Project Editor ISO/IEC 26300
Co-Editor, ISO/IEC 13250-1, 13250-5 (Topic Maps)
OASIS Technical Advisory Board (TAB) - member

Another Word For It (blog): http://tm.durusau.net
Homepage: http://www.durusau.net
Twitter: patrickDurusau

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