Hello! I'd like to know if the following is possible: 1. User has a PDF file which he/she signs with some external application. The hash of the original PDF file can not change for the signature be valid, of course. 2. The external signature format is embedded inside the PDF as a custom signature object (doable with itext). 3. The signature object is extracted&removed from the file done in step 2. and the PDF file looks the same as in step 1 (meaning that the SHA1 sum of the PDF file from which the signature object is removed is the same as for the original file)
I have successfully implemented the embedding of the external data in step 2 and extraction of the external data in step 3 but I don't know if/how it is possible to get the PDF file back to virgin state. Is it possible at all? What kind of strategy should I choose to implement this scenario ? Thanks, -- Martin Paljak http://martin.paljak.pri.ee ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ 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/
