Rocco David, Rocco David wrote > But when i try to sign a pdf file with HashAlgorithm Sha256 and so i > change > > HashAlgorithm sha = new SHA1CryptoServiceProvider(); > PdfSignature dic = new PdfSignature(PdfName.ADOBE_PPKMS, > PdfName.ADBE_PKCS7_SHA1); > > in > > PdfSignature dic = new PdfSignature(PdfName.ADOBE_PPKLITE, > PdfName.ADBE_PKCS7_DETACHED); > HashAlgorithm sha = new SHA256Managed();
Switching from ADBE_PKCS7_SHA1 to ADBE_PKCS7_DETACHED implies more differences than the hashing algorithm alone. Especially the document hash is inserted at a different position in the signature container. Therefore, you had better have a look at the ADBE_PKCS7_DETACHED samples on the web page you refered to in your original mail and replace your signature container creation code accordingly. Regards, Michael -- View this message in context: http://itext-general.2136553.n4.nabble.com/Problem-to-sign-using-Sha256-tp4471288p4471306.html Sent from the iText - General mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ iText-questions mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/itext-questions iText(R) is a registered trademark of 1T3XT BVBA. Many questions posted to this list can (and will) be answered with a reference to the iText book: http://www.itextpdf.com/book/ Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php
