Maybe it's supposed to fail. Are you sure that the certificate matches?
Does it verify in Acrobat?
Paulo
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Eric Chow
> Sent: Tuesday, November 07, 2006 9:54 AM
> To: Post all your questions about iText here
> Subject: Re: [iText-questions] Verify digital signature
>
> Hi Paulo,
>
> I referenced from that example, but it always showed
> "System.out.println("Certificate failed: " + ......);
>
> as I showed in the example.
>
> Eric
>
>
>
> On 11/6/06, Paulo Soares <[EMAIL PROTECTED]> wrote:
> > http://itextpdf.sourceforge.net/howtosign.html has an example.
> >
> > Paulo
> >
> > ----- Original Message -----
> > From: "Eric Chow" <[EMAIL PROTECTED]>
> > To: <itext-questions@lists.sourceforge.net>
> > Sent: Monday, November 06, 2006 9:18 AM
> > Subject: [iText-questions] Verify digital signature
> >
> >
> > > Hello,
> > >
> > > How can verify the signature in iText?
> > > - does the document modify?
> > > - does the certificate valid ?
> > >
> > >
> > > For the modification, I can get some examples for
> reference but for
> > > the certificate validation, it always FAILED.
> > >
> > >
> > > The following is my code:
> > >
> > > PdfReader reader = new PdfReader(signedPDF);
> > >
> > > AcroFields af = reader.getAcroFields();
> > > ArrayList names = af.getSignatureNames();
> > >
> > > for (int k = 0; k < names.size(); ++k) {
> > > String name = (String) names.get(k);
> > > System.out.println("Signature name: " + name);
> > > System.out.println("Signature covers whole document: " +
> > > af.signatureCoversWholeDocument(name));
> > > System.out.println("Document revision: " +
> af.getRevision(name) + " of "
> > > + af.getTotalRevisions());
> > >
> > > PdfPKCS7 pk = af.verifySignature(name);
> > >
> > >
> > > Calendar cal = pk.getSignDate();
> > > Certificate pkc[] = pk.getCertificates();
> > > System.out.println("Subject: " +
> > > PdfPKCS7.getSubjectFields(pk.getSigningCertificate()));
> > > System.out.println("Document modified: " + !pk.verify());
> > > Object fails[] = PdfPKCS7.verifyCertificates(pkc,
> keystore, null, cal);
> > >
> > > if (fails == null)
> > > System.out.println("Certificates verified against
> the KeyStore");
> > > else
> > > System.out.println("Certificate failed: " + fails[1]);
> > > }
> > >
> > >
> > >
> > > Best regards,
> > > Eric
> > >
> > >
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> Using Tomcat but need to do more? Need to support web
> services, security?
> Get stuff done quickly with pre-integrated technology to make
> your job easier
> Download IBM WebSphere Application Server v.1.0.1 based on
> Apache Geronimo
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> dat=121642
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