Hallo,
Thanks for the answer. I have found the solution. The keystore wasn't properly
build.
But next problem is that I get a message form Acrobat Reader (Version 8 German)
that he couldn't find the handler to verify the Signature.
Now anybody, how I add a handler to the document?
Here my code that I use:
KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
URL url= this.getClass().getClassLoader().getResource("anotherstore.jks");
ks.load(new FileInputStream(url.getPath()), "jk(JK)%jk".toCharArray());
String alias = (String)ks.aliases().nextElement();
PrivateKey key = (PrivateKey)ks.getKey(alias, "jk(JK)%jk".toCharArray());
Certificate[] chain = ks.getCertificateChain(alias);
PdfReader reader2 = new PdfReader(out.toByteArray());
ByteArrayOutputStream fout = new ByteArrayOutputStream();
PdfStamper stp = PdfStamper.createSignature(reader2, fout, '\0');
PdfSignatureAppearance sap = stp.getSignatureAppearance();
sap.setCrypto(key, chain, null, PdfSignatureAppearance.VERISIGN_SIGNED);
sap.setReason("Unterschrift Angebot");
sap.setLocation("Saarbrücken");
// comment next line to have an invisible signature
sap.setVisibleSignature(new Rectangle(100, 100, 200, 200), 1, null);
sap.setCertified(true);
stp.close();
Thanks
Jens Kelkel
-------- Original-Nachricht --------
Datum: Thu, 22 Feb 2007 15:32:06 -0000
Von: "Paulo Soares" <[EMAIL PROTECTED]>
An: "Post all your questions about iText here"
<[email protected]>
CC:
Betreff: Re: [iText-questions] sign a PDF
> sap.setCrypto(key, chain, null, PdfSignatureAppearance.VERISIGN_SIGNED);
>
> Maybe key or chain are null.
>
> Paulo
>
> > -----Original Message-----
> > From: [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED] On
> > Behalf Of Jens Kelkel
> > Sent: Thursday, February 22, 2007 2:16 PM
> > To: [email protected]
> > Subject: [iText-questions] sign a PDF
> >
> > Hello,
> >
> > I want to sign a PDF with the following code:
> >
> > KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
> > System.out.println(ks.getProvider());
> > ks.load(new
> > FileInputStream("C:\\j2sdk1.4.2_05\\bin\\keystore3.ks"),
> > pass.toCharArray());
> >
> > String alias = (String)ks.aliases().nextElement();
> > PrivateKey key = (PrivateKey)ks.getKey(alias, pass.toCharArray());
> >
> > Certificate[] chain = ks.getCertificateChain(alias);
> > PdfReader reader = new PdfReader("c:\\Antrag.pdf");
> > FileOutputStream fout = new FileOutputStream("c:\\signed.pdf");
> > PdfStamper stp = PdfStamper.createSignature(reader, fout, '\0');
> > PdfSignatureAppearance sap = stp.getSignatureAppearance();
> > sap.setCrypto(key, chain, null,
> > PdfSignatureAppearance.VERISIGN_SIGNED);
> > sap.setReason("I'm the author");
> > sap.setLocation("Saarbrücken");
> > sap.setVisibleSignature(new Rectangle(100, 100, 200, 200), 1, null);
> > sap.setCertified(true);
> > stp.close();
> >
> > If I use a self signed Certificate the code run with no
> > problem. But if I import my Versign Certificate in the
> > keystore I get the follow Message.
> >
> > java.lang.NullPointerException
> > at
> > com.lowagie.text.pdf.PdfSignatureAppearance.getAppearance(PdfS
> > ignatureAppearance.java:395)
> > at
> > com.lowagie.text.pdf.PdfSignatureAppearance.preClose(PdfSignat
> > ureAppearance.java:902)
> > at
> > com.lowagie.text.pdf.PdfSignatureAppearance.preClose(PdfSignat
> > ureAppearance.java:847)
> > at com.lowagie.text.pdf.PdfStamper.close(PdfStamper.java:175)
> > at de.jens.kelkel.PDFSignature.main(PDFSignature.java:89)
> > Exception in thread "main"
> >
> > Have anybody a solution fort hat problem??
> >
> > --
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