hello luis! > do it. But, at the moment, I don't know how to validate > the state of revocation of the certificate (to validate it > with CRL or with OCSP). hmmm, i don't quite understand what you mean by this.
in my scenario i create pdfs dynamically and i want them to be signed by the creating system. it should be guaranteed that they really where created on machine x (with keystore y) and that the pdf cannot be modified. what i've handled so far is the keystore stuff (using bouncycastle) but i've no idea how to handle the pdf and the signature when created. did you or peter manage to do this with iText and if yes, how? regards randolph > > regards, > > Luis > > DI Randolph Kepplinger escribi�: > > hello! > > > > i saw that you have been posting on the subject digitally signing pdf. > > did you finally succeed and do you have a working example for this? > > > > regards > > > > randolph > > > > On Tue, 2 Mar 2004, [ISO-8859-1] "S?lter, Peter" wrote: > > > > > >>Hi Luis, > >>you need to calculate the signature over the whole PDF (without the > >>contents-data). > >> > >>Therefore it's the best to > >>- fill the contents-field with a placeholder > >>- write out the whole PDF to a ByteArray > >>- calculate the hash-value and signature > >>- replace the /Contents-Data with the new data in the byte array > >> > >>It's useful to do the same procedure (set placeholder-data / write out / > >>replace) > >>with the /ByteRange value, too. > >> > >>Regards, > >> Peter > >> > >>-----Urspr?ngliche Nachricht----- > >>Von: Luis Pascual Forner [mailto:[EMAIL PROTECTED] > >>Gesendet: Montag, 1. M?rz 2004 13:10 > >>An: [EMAIL PROTECTED] > >>Betreff: [iText-questions] How to modify a signature dictionary > >> > >> > >>Hi, > >> > >> I need to modify the "/Contents" field from a signature dictionary after > >>"addToBody" it. How can I do?. > >> > >>thanks in advance, > >> > >> Luis Pascual > >> > >> > >>-- > >>Si su programa de correo le informa de que la firma no > >>es v?lida, se puede deber a que no tiene instalado el certificado de la > >>Autoridad Certificadora (CA). Lo puede obtener en http://www.pki.gva.es. > >> > >> > >> > >>------------------------------------------------------- > >>SF.Net is sponsored by: Speed Start Your Linux Apps Now. > >>Build and deploy apps & Web services for Linux with > >>a free DVD software kit from IBM. Click Now! > >>http://ads.osdn.com/?ad_id56&alloc_id438&op=click > >>_______________________________________________ > >>iText-questions mailing list [EMAIL PROTECTED] > >>https://lists.sourceforge.net/lists/listinfo/itext-questions > >> > >> > >> > >>------------------------------------------------------- > >>SF.Net is sponsored by: Speed Start Your Linux Apps Now. > >>Build and deploy apps & Web services for Linux with > >>a free DVD software kit from IBM. Click Now! > >>http://ads.osdn.com/?ad_id56&alloc_id438&op?k > >>_______________________________________________ > >>iText-questions mailing list > >>[EMAIL PROTECTED] > >>https://lists.sourceforge.net/lists/listinfo/itext-questions > >> > > > > > > > > > > ------------------------------------------------------- > > This SF.Net email is sponsored by: SourceForge.net Broadband > > Sign-up now for SourceForge Broadband and get the fastest > > 6.0/768 connection for only $19.95/mo for the first 3 months! > > http://ads.osdn.com/?ad_id%62&alloc_ida84&op=click > > _______________________________________________ > > iText-questions mailing list > > [EMAIL PROTECTED] > > https://lists.sourceforge.net/lists/listinfo/itext-questions > > > > . > > > > -- > Si su programa de correo le informa de que la firma no > es v�lida, se puede deber a que no tiene instalado el > certificado de la Autoridad Certificadora (CA). > Lo puede obtener en http://www.pki.gva.es. > ------------------------------------------------------- This SF.Net email is sponsored by: SourceForge.net Broadband Sign-up now for SourceForge Broadband and get the fastest 6.0/768 connection for only $19.95/mo for the first 3 months! http://ads.osdn.com/?ad_id%62&alloc_ida84&op=click _______________________________________________ iText-questions mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/itext-questions
