Thanks. JC Guerrero
2009/7/2, Leonard Rosenthol <[email protected]>: > > Not with any high level API, but you could certainly find out the > information you need using the infrastructure of iText’s low level PDF > reading library. > > Leonard > > > On 7/2/09 8:34 AM, "JC Guerrero" <[email protected]> wrote: > > Many thanks Paulo and Andreas for your quick response. > > I have been reviewed the thread about version comparison and I have similar > needs. > > Now that I know there is no documentation from Adobe about legal or not > legal changes on a certified document, I will try to get an alternative. > > What I really need is to check if the only change between two signatures is > the last signature or there are more changes between both revisions. Is > there any way to achieve this with iText? > > Thanks a lot!! > > JC Guerrero > > > 2009/7/2, Andreas Kuehne <[email protected]>: > > > Hi JC, > > I do understand the concept of certification the way that it should hinder > software to do further 'unallowed' changes. > To track the changes that happened to a document later on and compare the > different versions is a difficult task. There was a mail thread regarding > version comparsion some weeks ago ... > > Greetings > > Andreas > > > > ----- Original Message ---- > From: Paulo Soares <[email protected]> > To: Post all your questions about iText here < > [email protected]> > Sent: Thursday, July 2, 2009 12:29:26 PM > Subject: Re: [iText-questions] Verify PDF certification validity using > iText > > There's no documentation from Adobe on what is considered legal or not to > add to a certified doc. iText doesn't do any verifying other than verifying > the signature. > > Paulo > > > -----Original Message----- > > From: JC Guerrero [mailto:[email protected]<[email protected]> > ] > > Sent: Thursday, July 02, 2009 8:50 AM > > To: [email protected] > > Subject: [iText-questions] Verify PDF certification validity > > using iText > > > > Hello. > > > > First, sorry for my english... > > > > I'm using Java iText to certify PDF document and get control > > of changes allowed in document. I want to only allow to > > append new digital signatures over the certified document. > > > > The PDF certified with > > sap.setCertificationLevel(PdfSignatureAppearance..CERTIFIED_FOR > > M_FILLING) is verifiyng OK, either with iText and Adobe > > Reader if only changes allowed are appended to the document. > > > > But i don't know how can i check if the certification > > maintains his validity (with iText) when changes not allowed > > have been added to the document certified. > > > > Is there any way to check the certification status with itext? > > > > Many thanks. > > > > JC Guerrero > > > > Aviso Legal: > Esta mensagem é destinada exclusivamente ao destinatário. Pode conter > informação confidencial ou legalmente protegida. A incorrecta transmissão > desta mensagem não significa a perca de confidencialidade. Se esta mensagem > for recebida por engano, por favor envie-a de volta para o remetente e > apague-a do seu sistema de imediato. É proibido a qualquer pessoa que não o > destinatário de usar, revelar ou distribuir qualquer parte desta mensagem. > > Disclaimer: > This message is destined exclusively to the intended receiver. It may > contain confidential or legally protected information. The incorrect > transmission of this message does not mean the loss of its confidentiality. > If this message is received by mistake, please send it back to the sender > and delete it from your system immediately.. It is forbidden to any person > who is not the intended receiver to use, distribute or copy any part of this > message. > > > > ------------------------------------------------------------------------------ > _______________________________________________ > iText-questions mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/itext-questions > > Buy the iText book: http://www.1t3xt.com/docs/book.php > Check the site with examples before you ask questions: > http://www.1t3xt.info/examples/ > You can also search the keywords list: > http://1t3xt.info/tutorials/keywords/ > > > > > -- > Leonard Rosenthol > PDF Standards Architect > Adobe Systems Incorporated > > > ------------------------------------------------------------------------------ > > _______________________________________________ > iText-questions mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/itext-questions > > Buy the iText book: http://www.1t3xt.com/docs/book.php > Check the site with examples before you ask questions: > http://www.1t3xt.info/examples/ > You can also search the keywords list: > http://1t3xt.info/tutorials/keywords/ >
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