Hi Robert,
if you want to have a quick check of your signature, try http://sig-check.eu . Your signature probably won't be accepted as valid ( we accept legal binding qualified certs only ), but you can see whether the sigature structure is intact. Btw, we implemented it the way Michael outlined : Using iText to extract the signature and deliver the byte ranges. Then we use the iaik toolkit to do the cryptografic processing. Bouncy Castle will do the job, too. Good luck Andreas ----- Original Message ---- From: mkl <[email protected]> To: [email protected] Sent: Saturday, May 23, 2009 1:14:03 PM Subject: Re: [iText-questions] Verifying signature!! NoSuchAlgorithmException: 1.2.840.113549.1.1.1 Robert, RobertQ wrote: > > Then is there any way to verify a PDF signature using iText??? > iText allows you to extract both the signature container and the signed data stream for each signature. Without too much hassle you can thus verify the PDF signatures using a crypto library of your choice. Regards, Michael. -- View this message in context: http://www.nabble.com/Verifying-signature%21%21-NoSuchAlgorithmException%3A-1.2.840.113549.1.1.1-tp23673079p23683498.html Sent from the iText - General mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT is a gathering of tech-side developers & brand creativity professionals. Meet the minds behind Google Creative Lab, Visual Complexity, Processing, & iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian Group, R/GA, & Big Spaceship. http://www.creativitycat.com _______________________________________________ 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/ ------------------------------------------------------------------------------ Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT is a gathering of tech-side developers & brand creativity professionals. Meet the minds behind Google Creative Lab, Visual Complexity, Processing, & iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian Group, R/GA, & Big Spaceship. http://www.creativitycat.com _______________________________________________ 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/
