Does it mean that signed information (the one the hash is generated from) includes the original document plus some information about the signature (maybe the date)? If that's not the case, the same operation would generate the same hash code.
Regards, Jorge -----Mensaje original----- De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] En nombre de Paulo Soares Enviado el: miércoles, 13 de junio de 2007 11:11 Para: Post all your questions about iText here Asunto: Re: [iText-questions] Sending HASH to external components to getitsigned The PKCS#7 must be inserted in the pdf before close. There's no way to "suspend" it and get back at a later time to add the signature. Paulo ----- Original Message ----- From: "jortizclaver" <[EMAIL PROTECTED]> To: <itext-questions@lists.sourceforge.net> Sent: Monday, June 11, 2007 6:27 PM Subject: [iText-questions] Sending HASH to external components to get itsigned > > Hi, > > I know I have a pretty common problem but I can't find the way to solve > it, > even after reading all the messages of this forum. > > I need to get my PDF documents signed by external components. It seems > like > what I need to do is generate a hash, send it to my external document, > retrieve from it a valid PKCS#7 and insert it into my document. > > The problem I have is that everytime a generate a HASH (getting bytes with > getRangeStream) I get a different one, so I can't reproduce the signature > process and insert the PKCS#7 into my file. Does anybody know how to make > it > work? How can I generate always the same HASH for one document? I read > many > questions about this but no success story. > > Thanks in advance, > Jorge Ortiz > ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Buy the iText book: http://itext.ugent.be/itext-in-action/ ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Buy the iText book: http://itext.ugent.be/itext-in-action/
