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
> >
> > -------------------------------------------------------------------------
> > 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
> > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> > _______________________________________________
> > iText-questions mailing list
> > iText-questions@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/itext-questions
>
>
> -------------------------------------------------------------------------
> 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
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> _______________________________________________
> iText-questions mailing list
> iText-questions@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/itext-questions
>
-------------------------------------------------------------------------
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
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
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