Eric, Eric Chow wrote > java.security.NoSuchAlgorithmException: no such algorithm: SHA1 for > provider SunPKCS11-GD > at sun.security.jca.GetInstance.getService(GetInstance.java:70) > at sun.security.jca.GetInstance.getInstance(GetInstance.java:190) > at java.security.Security.getImpl(Security.java:662) > at java.security.MessageDigest.getInstance(MessageDigest.java:185) > at > com.itextpdf.text.pdf.security.MakeSignature.signDetached(MakeSignature.java:128) > at TestSign.sign(TestSign.java:46) > at TestSign.main(TestSign.java:74)
There seems to be a small inconsistency concerning the use of the SunPKCS11 provider in iText: MakeSignature.signDetached uses the given provider (unless it is null) to retrieve the hash algorithm, too, while the PdfPKCS7 constructor (to which the provider value is forwarded) uses it to retrieve the hash algorithm only if it doesn't start with "SunPKCS11". This surely will be made consistent. The actual problem is IMO that there are two different uses for the given provider: It is used both for retrieving a digest algorithm and for retrieving a Signature instance. Sometimes, though, you need different providers for these tasks. Unless resorting to not using provider arguments, therefore, there should be overloads with two provider arguments. Regards, Michael. -- View this message in context: http://itext-general.2136553.n4.nabble.com/iText-5-3-0-digital-signature-problem-tp4655635p4655637.html Sent from the iText - General mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ iText-questions mailing list iText-questions@lists.sourceforge.net 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
