Hey,
this was the key point for me:
PdfSignatureAppearance.VERISIGN_SIGNED
i had this previously:
PdfSignatureAppearance.SELF_SIGNED
and even tried
PdfSignatureAppearance.WINCER_SIGNED
but verisign was the only one that worked.
In any case, what i placed here was the whole working(for me) code for a
test with a source and destination file. What will probably be different for
you is the way you sign the digest and the way you get the certificate
array.
I think these are the key code changes:
...
PdfSignatureAppearance appearance =
stamp.getSignatureAppearance();
...
// CcMethods.getChain() -> change to your method of getting
your certificate array
appearance.setCrypto(null, CcMethods.getChain(), null,
PdfSignatureAppearance.VERISIGN_SIGNED);
...
// new byte[128] is the "space"/"memory" reserved for the
signed digest array
appearance.setExternalDigest(new byte[128], null, "RSA");
appearance.preClose();
...
// in my case a 128 byte array generated from my signing
method, hashDig is the document's digest (20 byte array)
byte[] signedHash = CcMethods.sign(hashDig);
PdfDictionary dic = new PdfDictionary();
PdfPKCS7 sig = appearance.getSigStandard().getSigner();
sig.setExternalDigest(signedHash, null, "RSA");
dic.put(PdfName.CONTENTS, new
PdfString(sig.getEncodedPKCS1()).setHexWriting(true));
appearance.close(dic);
Hope this helps.
Regards,
Pedro
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