Dear IText Experts,
I would like to put a digital signature to an existing PDF document. In all
of the IText documentation I found a desctiprion about how to sign a PDF and
all of the ways use Bouncy Castle classes to encrypt the document hash.
eg:
PdfStamper st = PdfStamper.CreateSignature(reader, new
FileStream(this.outputPDF, FileMode.Create, FileAccess.Write), '\0', null,
true);
st.MoreInfo = this.metadata.getMetaData();
st.XmpMetadata = this.metadata.getStreamedMetaData();
PdfSignatureAppearance sap = st.SignatureAppearance;
sap.SetCrypto(this.myCert.Akp, this.myCert.Chain, null,
PdfSignatureAppearance.WINCER_SIGNED);
...
st.Close();
I have already had an encrypted signed hash (created from the pdf document
content and a MyCert.pfx) and I'd like to insert, appent (I dont know where
to) this existing signature to the existing PDF.
Does anybody know that should I use?
Any help would be appreciated.
Tamas
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