PDFBOX-5660: use constant

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1923231 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

examples/src/test/java/org/apache/pdfbox/examples/pdmodel/TestCreateSignature.java

@@ -935,9 +935,9 @@ private void checkLTV(File outFile)
             PDSignature signature = doc.getLastSignatureDictionary();
             byte[] contents = signature.getContents();
             PDDocumentCatalog docCatalog = doc.getDocumentCatalog();
-            COSDictionary dssDict = docCatalog.getCOSObject().getCOSDictionary(COSName.getPDFName("DSS"));
+            COSDictionary dssDict = docCatalog.getCOSObject().getCOSDictionary(COSName.DSS);
             COSArray dssCertArray = dssDict.getCOSArray(COSName.CERTS);
-            COSDictionary vriDict = dssDict.getCOSDictionary(COSName.getPDFName("VRI"));
+            COSDictionary vriDict = dssDict.getCOSDictionary(COSName.VRI);
             // Check that all known signature certificates are in the VRI/signaturehash/Cert array
             byte[] signatureHash = MessageDigest.getInstance("SHA-1").digest(contents);
             String hexSignatureHash = Hex.getString(signatureHash);