You need at least 2.1.7 and other corrections were introduced in 5.0.x.
Paulo
________________________________
From: D'Angelo, Adam [mailto:[email protected]]
Sent: Monday, November 29, 2010 5:44 PM
To: [email protected]
Subject: [iText-questions] Acroform verifySignature() PdfPKCS7 error with
SHA256 in iText 2.1.3
We are currently using iText 2.1.3 to pull an Entrust certificate from a PDF.
Up until recently the encryption of these certs has been SHA1. However, due to
pending security infrastructure changes, all certificates will be SHA256 going
forward. While testing with the newer SHA256 Entrust certs we receive the
following error:
com.lowagie.text.ExceptionConverter: 2.16.840.1.101.3.4.2.1 MessageDigest not
available
This error is thrown from this line of code:
//form is an AcroFields form
PdfPKCS7 pk = form.verifySignature(signatureFieldName);
What version of iText supports SHA256? Is there a way to resolve this issue
without updating the version of iText we are using?
Thanks,
Adam D'Angelo, PMP | [email protected]<mailto:[email protected]>
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