I am trying to sign a lot of PDF files using iText (latest version) for Java.
But I have problem with big ones. With files with size over 30 MByte (until 120
MByte) I get a signature non valid error in the Acrobat Reader (and other
readers) with this message: SigDict / Contents illegal data
The same code works well for other files with size < 30 MByte. Here is the code
I use:
***********************
KeyStore ks = KeyStore.getInstance("JKS");
ks.load(new FileInputStream(keystore_path), keystore_password.toCharArray());
String alias = prop.getProperty("key.alias");
PrivateKey pk = (PrivateKey)ks.getKey(alias , key_password.toCharArray());
Certificate[] chain = ks.getCertificateChain(alias);
PdfReader reader = new PdfReader(fileIn.getPath(), ownerpassword);
PdfStamper stamper = PdfStamper.createSignature(reader, new
FileOutputStream(fileOut), '\0', null , true);
PdfSignatureAppearance appearance = stamper.getSignatureAppearance();
appearance.setCrypto(pk, chain, null, PdfSignatureAppearance.WINCER_SIGNED);
Rectangle rect = new
Rectangle(Integer.parseInt(prop.getProperty("sign.field.start.x")),
Integer.parseInt(prop.getProperty("sign.field.start.y")),
Integer.parseInt(prop.getProperty("sign.field.end.x")),
Integer.parseInt(prop.getProperty("sign.field.end.y")));
appearance.setReason(prop.getProperty("sign.field.reason"));
appearance.setLocation(prop.getProperty("sign.field.location"));
appearance.setVisibleSignature(rect,
Integer.parseInt(prop.getProperty("sign.field.page")), "SignField");
stamper.close();
***********************
I am sorry for the Cross-post on Stackoverflow but I am trying to find a
solution to this problem and so I post here too.
Thanks a lot
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