Hello Cristina,
What PDFBox version are you using? Hopefully 2.0.18.
IMHO the problem is likely in your external signature server code,
please compare it with the sign() code from the example.
Could you upload a result PDF to a sharehoster (do't attach)? Also try
to run the ShowSignature.java example on your result PDF, I'd like to
see the error message.
Tilman
Am 09.02.2020 um 21:56 schrieb Cristina Ruica:
Hi! I'm trying to add external signature to a pdf, and I get formatting
error when I open the document. My code is: <code> @Override public byte[]
sign(InputStream content) throws IOException { try { MessageDigest digest =
MessageDigest.getInstance("SHA-256"); byte[] hashBytes =
digest.digest(content.readAllBytes()); String base64Hash =
Base64.encodeBytes(hashBytes); String signature = (Base64signature from
server) return Base64.decode(signature); } public void
signDetached(PDDocument document, OutputStream output) throws
IOException { PDSignature
signature = new PDSignature();
signature.setFilter(PDSignature.FILTER_ADOBE_PPKLITE);
signature.setSubFilter(PDSignature.SUBFILTER_ADBE_PKCS7_DETACHED);
signature.setSignDate(Calendar.getInstance());
document.addSignature(signature); ExternalSigningSupport externalSigning =
document.saveIncrementalForExternalSigning(output); byte[] cmsSignature =
sign(externalSigning.getContent());
externalSigning.setSignature(cmsSignature); } </code>
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