Raffaele,
Raffaele wrote
> I'va an external Signature Service that give me the signed hash in SHA256.
> Now i've to insert this hash into a pdf file.
>
> [...]
>
> And the signature is ok.
> Now i've to timestamping the signature field.
> I've used the code:
>
> [...]
> LtvVerification v = stamper.LtvVerification;
> AcroFields af = stamper.AcroFields;
> foreach (string sigName in af.GetSignatureNames())
> {
> v.AddVerification(sigName, new OcspClientBouncyCastle(),
> new CrlClientImp(), LtvVerification.CertificateOption.WHOLE_CHAIN,
> LtvVerification.Level.OCSP_CRL, LtvVerification.CertificateInclusion.YES);
> }
> PdfSignatureAppearance sap = stamper.SignatureAppearance;
> sap.CertificationLevel =
> PdfSignatureAppearance.CERTIFIED_NO_CHANGES_ALLOWED;
> // Telecom TSA
> TSAClientBouncyCastle tsa = new TSAClientBouncyCastle(TSA_URL,
> TSA_ACCNT, TSA_PASSW, 6500, "sha256");
> LtvTimestamp.Timestamp(sap, tsa, null);
>
> but it append another sing to the document.
>
> What's wrong???
What do you mean by "it append another sing to the document"?
You used code which appends PAdES style long term validation information and
a document time stamp.
If you did not want to do this but instead add a signature time stamp
attribute to the signature container, you should look at
http://itextpdf.sourceforge.net/howtosign.html#signtsocspjava (Java) or
http://itextpdf.sourceforge.net/howtosign.html#signtsocspcs (C#)
for inspiration.
Regards, Michael
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