> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Felix Joussein
> Sent: Friday, October 27, 2006 2:44 PM
> To: Post all your questions about iText here
> Subject: Re: [iText-questions] Signatures and certification
>
> Hello Paulo,
>
> Can you explain shortly why?
> Many people still have Acrobat Reader 6 installed.
It's a lot more difficult.
>
> Will certification work in any further version of Acrobat Reader?
I believe it will but only only Adobe will have a definitive answer on
that.
Paulo
>
> Many thanks,
>
> Felix Joussein
>
> Paulo Soares schrieb:
>
> Certification in iText only works in Acrobat 7.
>
> Paulo
>
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
>
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Felix Joussein
> Sent: Friday, October 27, 2006 1:51 PM
> To: Post all your questions about iText here
> Subject: [iText-questions] Signatures and certification
>
> Hello List,
>
> I wrote a little tool using the itext library
> to sign and certify pdf
> documents.
>
> Here the relevant part of the code:
>
> KeyStore ks =
> KeyStore.getInstance("pkcs12");
> ks.load(new FileInputStream(pfxNameVal),
> pfxPassVal.toCharArray());
> String alias =
> (String)ks.aliases().nextElement();
> PrivateKey key =
> (PrivateKey)ks.getKey(alias,
> pfxPassVal.toCharArray());
> java.security.cert.Certificate[] chain =
> ks.getCertificateChain(alias);
> PdfReader reader = new PdfReader(inPDFVal);
> FileOutputStream fout = new
> FileOutputStream(outPDFVal);
> PdfStamper stp =
> PdfStamper.createSignature(reader, fout,
> '\0');
> PdfSignatureAppearance sap =
> stp.getSignatureAppearance();
> sap.setCrypto(key, chain, null,
> PdfSignatureAppearance.WINCER_SIGNED);
> sap.setReason("Ich bin der Autor
> dieses Dokuments.");
> sap.setLocation("Wien");
>
>
> stp.setEncryption(true,pdfUPWVal,pdfAPWVal,PdfWriter.AllowCopy
> +PdfWriter.AllowPrinting);
> if(sigVisVal.equalsIgnoreCase("1")){
> sap.setVisibleSignature(new
> Rectangle(100, 150, 200,
> 200), 1, null);
> }
> if(certVisVal.equalsIgnoreCase("1")){
> sap.setCertified(true);
> }
> stp.close();
>
>
> The result with Acrobat Reader 7.x is as
> expected, a signed,
> certified
> document:
> Document signature is VALID.
> - The document has not been changed since the
> signature was applied.
> - The document is signed by the current user.
>
>
> When opening the same file with Acrobat Reader
> 6.x, it says:
> Document signature is INVALID.
> - There have been changes made to this document
> that invalidate the
> signature.
> - The document is signed by the current user.
>
> When I sign & certify a document using the
> Adobe Acrobat 6, the
> signature is valid in any of the 2 versions above.
>
> What is wrong to this code?
> Can someone help me on that?
>
> Regards,
>
> Felix Joussein
>
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