You already have a working solution.
Paulo
________________________________
From: Massa Alfonso [mailto:alfonso.ma...@insiel.it]
Sent: Thursday, February 02, 2012 9:07 AM
To: Post all your questions about iText here
Subject: [iText-questions] R: failure in verifyTimestampImprint with message
Imprint Algorithm SHA-256
So how can I do in the meanwhile to verify the TimestampImprint?
Can you help me to write a workaround in the meanwhile to do this?
Thanks in advance
Regards,
Alfonso
rispetta l’ambiente: se non ti e` necessario non stampare questa mail
Da: Paulo Soares [mailto:psoa...@glintt.com]
Inviato: martedì 31 gennaio 2012 10:38
A: Post all your questions about iText here
Oggetto: Re: [iText-questions] failure in verifyTimestampImprint with message
Imprint Algorithm SHA-256
Thank you for the code, it's correct. I'm adding PAdES-LTV verification support
and I've code similar to yours.
Paulo
________________________________
From: Massa Alfonso
[mailto:alfonso.ma...@insiel.it]<mailto:[mailto:alfonso.ma...@insiel.it]>
Sent: Monday, January 30, 2012 2:06 PM
To:
itext-questions@lists.sourceforge.net<mailto:itext-questions@lists.sourceforge.net>
Subject: [iText-questions] failure in verifyTimestampImprint with message
Imprint Algorithm SHA-256
Hi,
I have a timestamp that was built with an algorithm SHA-256. When I use the
verifyTimestampImprint() function to verify the timestamp, it fails.
Thus, I had to change the function as follows:
public boolean verifyTimestampImprint() throws NoSuchAlgorithmException {
if (timeStampToken == null)
return false;
TimeStampTokenInfo info = timeStampToken.getTimeStampInfo();
MessageImprint imprint = info.toTSTInfo().getMessageImprint();
String algOID = info.getMessageImprintAlgOID();
byte[] md = MessageDigest.getInstance(algOID).digest(digest);
byte[] imphashed = imprint.getHashedMessage();
boolean res = Arrays.equals(md, imphashed);
return res;
}
and it works.
If you found other ways to verify timestamp built with an algorithm SHA-256
please let me know.
Regards,
Alfonso Massa
________________________________
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