Hello, My problem is that I have some signed PDFs, and now I have to timestamp them.
I'm quite a newbie regarding the PDF format... I'm using iText, and I've seen that I can add a PdfPKCS7 signature with a timestamp to the PDF, but I don't know how to retrieve an existing signature and append/modify the timestamping information. It looks like the timestamping information is an unauthenticated attribute, with the id 1.2.840.113549.1.9.16.2.14, but I don't know how to alter attributes in a PDF. Could somebody give me some pointers or sample code? Thanks in advance. Daniel Pérez Álvarez Technological Solutions Atos Origin +34 91 126 7310 C/ Albasanz, 16 28037 Madrid Spain ------------------------------------------------------------------ This e-mail and the documents attached are confidential and intended solely for the addressee; it may also be privileged. If you receive this e-mail in error, please notify the sender immediately and destroy it. As its integrity cannot be secured on the Internet, the Atos Origin group liability cannot be triggered for the message content. Although the sender endeavours to maintain a computer virus-free network, the sender does not warrant that this transmission is virus-free and will not be liable for any damages resulting from any virus transmitted. Este mensaje y los ficheros adjuntos pueden contener informacion confidencial destinada solamente a la(s) persona(s) mencionadas anteriormente pueden estar protegidos por secreto profesional. Si usted recibe este correo electronico por error, gracias por informar inmediatamente al remitente y destruir el mensaje. Al no estar asegurada la integridad de este mensaje sobre la red, Atos Origin no se hace responsable por su contenido. Su contenido no constituye ningun compromiso para el grupo Atos Origin, salvo ratificacion escrita por ambas partes. Aunque se esfuerza al maximo por mantener su red libre de virus, el emisor no puede garantizar nada al respecto y no sera responsable de cualesquiera danos que puedan resultar de una transmision de virus. ------------------------------------------------------------------ ------------------------------------------------------------------------------ ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeek-promo _______________________________________________ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Buy the iText book: http://www.itextpdf.com/book/ 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/
