It's a mystery to me. The document was not changed since it was signed but has x misc changes. I wonder if those "x misc changes" have any relevance or are another Acrobat 7 feature just to annoy non Acrobat tools. I'll continue my investigations.
----- Original Message ----- From: "Siegfried Goeschl" <[EMAIL PROTECTED]> To: "Paulo Soares" <[EMAIL PROTECTED]>; <[email protected]> Sent: Friday, March 25, 2005 8:57 AM Subject: Re: [iText-questions] [signature] - Acrobat Reader 7.0 complains about modification of a signed PDF > Hi Paulo, > > thanks for your quick reply for a first-time mailer .... :-) ... see the > comments below ... > > Thanks in advance > > Siegfried Goeschl > > > Paulo Soares wrote: > > >----- Original Message ----- > >From: "Siegfried Goeschl" <[EMAIL PROTECTED]> > >To: <[email protected]> > >Sent: Thursday, March 24, 2005 3:40 PM > >Subject: [iText-questions] [signature] - Acrobat Reader 7.0 complains about > >modification of a signed PDF > > > > > > > > > >>Hi folks, > >> > >>I signed a PDF document using itext-paulo-153 and JDK 1.4.2. Acrobat > >>Reader 7.0 complains that the signature is okay but the document has > >>changed (3 misc changes) ... this is the same problem that Joachim > >>Kerschbaumer had in February (hello, by the way). > >> > >>+) Paulo meant this has something to do with the certificate so I tested > >>it with two different certificates to no avail - I agree that the A-CERT > >>certificate is touchy so I used a webtrust.de certificate as well > >> > >> > >> > > > >The problem was with the german version of Acrobat Reader 7. The icon didn't > >match the text. The english version was ok. > > > > > > Correct - the german text is really broken but even the English version > of Acrobat Reader 7.0 states that there were miscellanous changes not > affecting the signature. Check out Validate Signature/Signature > Properties Button/Document Tab/Compute Modification List Button: > > +) I get 1 miscellanous change for the visible signature for my signed PDF > +) I get 3 miscellanous change for the invisible signature for my signed PDF > +) Using the same certificate with Acrobat 6.0/7.0 does not report any > changes > > So the signature is valid but the changes to a read-only document are > confusing .... :-( > > > > > > >>+) I signed the same PDF manually with Acrobat Writer 6.0 and 7.0 and > >>this problem does not appear > >> > >> > >> > > > >You may not be signing the same way as iText. > > > > > > Well, I used the same certificate and signed the whole document > > > > > > >>+) Not being lazy I tested it with the german and english version of > >>Acrobat Reader but this doesn't make any difference > >> > >> > >> > > > >It did in the case of Joachim. > > > > > > > >>+) Quite interestingly the number of changes are depending on the usage > >>of visible/invisible signature. I assumed that the Acrobat Reader 7.0 > >>might tinker around depending on the PDF version so I enforced writing > >>out PDF 1.5 > >> > >>+) This problem does not appear when using Acrobat Reader 6.0 - so this > >>problem might be introduced with PDF 1.6 and Acrobat 7.0?! > >> > >> > >> > > > >Show us the pdfs and the steps you took to sign them. > > > > > > I send you the PDFs and the source code directly to you to avoid > flooding the mailing list > > > > > > >>Has anyone an idea what's going on?! > >> > >>Thanks in advance > >> > >>Siegfied Goeschl > >> > >> > >> > >>------------------------------------------------------- > >>This SF.net email is sponsored by Microsoft Mobile & Embedded DevCon 2005 > >>Attend MEDC 2005 May 9-12 in Vegas. Learn more about the latest Windows > >>Embedded(r) & Windows Mobile(tm) platforms, applications & content. > >> > >> > >Register > > > > > >>by 3/29 & save $300 > >> > >> > >http://ads.osdn.com/?ad_id=6883&alloc_id=15149&op=click > > > > > >>_______________________________________________ > >>iText-questions mailing list > >>[email protected] > >>https://lists.sourceforge.net/lists/listinfo/itext-questions > >> > >> > > > > > > > > > > ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ iText-questions mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/itext-questions
