Hi! I extracted that first signed revision now. Unfortunately the Reader here once more is quite lax when confronted with broken PDF documents. IMHO it should at least tell the user that the PDF is broken...
Regards, Mikel. -----Ursprüngliche Nachricht----- Von: Michael Klink [mailto:m...@wir-sind-cool.org] Gesendet: Dienstag, 30. Dezember 2008 20:49 An: itext-questions@lists.sourceforge.net Betreff: Re: [iText-questions] itext invalidates first signature. Why ? Hi HT, I looked at your PDF; Acrobat and the Reader are right, the signature byte range _is_ invalid. It is invalid in the sense that the part of the PDF file from the beginning of the file until the end of the last byte range is not a proper PDF file and therefore not a valid document revision to be signed. Look at it, you'll find that it's actually the signature dictionary (5 0 obj) itself which is located at an invalid position betwenn the trailer dictionary and the startxref making this revision invalid. >>>>>>>>>>>>>>> trailer << /Root 19 0 R /ID [<9d9bc8f4766bc3c0cabfe0a7409eb782><9d9bc8f4766bc3c0cabfe0a7409eb782> ] /Info 20 0 R /Size 22 >> 5 0 obj << [...] >> endobj startxref 000000003615 %%EOF 31 0 obj <<<<<<<<<<<<<<< Thus you simply have to repair the software that creates the first signature. Best regards, Michael. -----Ursprüngliche Nachricht----- Von: HidekiT [mailto:hideki.tih...@gmail.com] Gesendet: Dienstag, 30. Dezember 2008 15:33 An: itext-questions@lists.sourceforge.net Betreff: Re: [iText-questions] itext invalidates first signature. Why ? Hi All, if someone could give us some advice we would be very gratefull. We really don't see the solution to this problem. If someone could look at the pdf attached and try to find out what goes wrong ? We really checked all code many times but now we are desparate. (Open the doc and click on the grey signature to see the errormessage). The byteranges are OK so it must be something else... Thanks so much already ... HT HidekiT wrote: > > Hi, > > we get signed PDF documents made with 3rd party software we need to add > additional signature with iText. > > Problem is that the 1st signature gets invalid when 2nd is added. The > error is: > > Error during signature verification. > Unexpected byte range values defining scope of signed data. > Details: The signature byte range is invalid > > We don't understand why this happens ? When we open the original document > (with only 1st signature) no error is given so why is this invalidated > with iText when new signature is added ? > > I attach the file with the 2 signatures (only 10 kb) so if someone can > tell us what the problem is we might solve it. > > Any help much appreciated. > http://www.nabble.com/file/p21191679/Example_invalid-first-signature.pdf > Example_invalid-first-signature.pdf http://www.nabble.com/file/p21217894/Example_invalid-first-signature.pdf Example_invalid-first-signature.pdf -- Psssst! Schon vom neuen GMX MultiMessenger gehört? Der kann`s mit allen: http://www.gmx.net/de/go/multimessenger
Example_invalid-first-signature.001.pdf
Description: Adobe PDF document
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