Hello!
With the aim of get a signed pdf document, I do the following:
PdfReader reader = new PdfReader(pdfToSign);
FileOutputStream fout = new FileOutputStream(pdfToSignSigned);
PdfStamper stp = PdfStamper.createSignature(reader, fout, '\0');
PdfSignatureAppearance sap = stp.getSignatureAppearance();
sap.setCrypto(key, chain, null,
PdfSignatureAppearance.WINCER_SIGNED);
sap.setSignDate(Calendar.getInstance());
sap.setReason("I am the author");
sap.setLocation("Anywhere");
System.out.println("Signature Name = " + sap.getFieldName());
//Get the signature name
//Comment the next line if we want an invisible signature
sap.setVisibleSignature(new Rectangle(100, 100, 200, 200), 1,
null);
stp.close();
With this process, I obtain an adbe.pkcs7.sha1 signature (included in the
SubFilter field in the signature dictionary of the signed pdf). However, I
would like to get an adbe.pkcs7.detached signature.
Could you be so kind as to tell how can I get it instead of an
adbe.pkcs7.sha1 signature, please??
Thank you very much in advance.
Inma.
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