Hello everyone,
joy of joys, its working!
Sorry for double posting, but just wanted to put what worked for me here.
try{
// Initializes the Citizens Card
CcMethods.init();
// Creates the test files and gets their streams
File outFile = new File("C:/signed.pdf");
FileOutputStream os = new FileOutputStream(outFile);
// Creates a reader, gets the first page and creates a signature
PdfReader reader = new PdfReader("C:/unsigned.pdf");
PdfStamper stamp = PdfStamper.createSignature(reader, os, '\0');
PdfSignatureAppearance appearance =
stamp.getSignatureAppearance();
// Sets the signature visible and on the front page (top right
corner)
Rectangle rect = reader.getPageSize(1);
appearance.setVisibleSignature(new Rectangle(rect.getWidth() -
82,
rect.getHeight()- 78, rect.getWidth() -10, rect.getHeight() -30), 1, "sig");
// Sets crypto parameters with the proper certificates, wincer
is
advised
appearance.setCrypto(null, CcMethods.getChain(), null,
PdfSignatureAppearance.VERISIGN_SIGNED);
// Additional properties in the signing process
appearance.setReason("Autenticação do documento.");
// appearance.setLocation("Name of the location");
// appearance.setContact("Some sort of contact");
// appearance.setSignDate(new GregorianCalendar());
// Allocates space for the signed hash/digest
appearance.setExternalDigest(new byte[128], null, "RSA");
appearance.preClose();
// Process of hash/digest generation
MessageDigest md = MessageDigest.getInstance("SHA-1");
byte buf[] = new byte[8192];
int n = 0;
InputStream rs = appearance.getRangeStream();
md.reset();
while ((n = rs.read(buf)) != -1)
md.update(buf);
rs.close();
byte[] hashDig = md.digest();
// Signs the hash
byte[] signedHash = CcMethods.sign(hashDig);
// Places the signed hash/digest in the document
if(signedHash != null){
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);
}
else
System.out.println("Hash not signed");
CcMethods.finish();
os.close();
}
catch (Exception e){
e.printStackTrace();
}
Thanks Andreas and Michael for your help.
Regards,
Pedro
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