Works for me with this code:
PdfReader reader = new PdfReader("c:\\hello_field.pdf");
PdfStamper stp = PdfStamper.createSignature(reader, new
FileOutputStream("c:\\hello_field_sig.pdf"), '\0');
AcroFields af = stp.getAcroFields();
af.setField("Text1", "BUM");
PdfSignatureAppearance sap = stp.getSignatureAppearance();
sap.setCrypto(key, chain, null, PdfSignatureAppearance.WINCER_SIGNED);
// and so on
Paulo
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Felipe Gaúcho
> Sent: Thursday, June 14, 2007 9:40 AM
> To: [email protected]
> Subject: [iText-questions] signing PDF
>
> Hi,
>
> I am creating a new project:
> http://weblogs.java.net/blog/felipegaucho/archive/2007/06/intr
> oducing_the.html
>
> it is already running some features, but the PDF details about digital
> signature and iText seems a bit odd for me.
>
> in my basic use-case, the code:
>
> 1 - read a PDF tamplate
>
> 2 - fill form fields:
> 2.1 - connect to a JDBC data source
> 2.2 - read a mapping properties (mapping between the PDF fields
> and Column names)
> 2.3 - fill the fields using the values read from database and the
> mapping properties
>
> 3 - sign the pdf
>
> 4 - save the new PDF (with filled fields and signed)
>
> ---------------------------
>
> If I try to do that using that sample from the iText documentation,
> the generated PDF is never recognized as authentic signed PDF by Adobe
> because it say the content was changed since the pdf generation...
>
> If I do that in two steps: first generating and saving a modified PDF,
> and then re-open this pdf, sign and save, everything works fine and
> Adobe don't disclaim anymore..
>
> Why can't I do that in just 1 step ?
>
>
> best regards,
>
> Felipe Gaucho
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