--- com/itextpdf/signatures/PrivateKeySignature.java.orig	2016-05-02 16:35:28.000000000 +0700
+++ com/itextpdf/signatures/PrivateKeySignature.java	2016-07-31 21:59:14.397003000 +0700
@@ -104,6 +104,14 @@ public class PrivateKeySignature impleme
      * {@inheritDoc}
      */
     @Override
+    public String setEncryptionAlgorithm(String a) {
+        encryptionAlgorithm = a;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
     public byte[] sign(byte[] message) throws GeneralSecurityException {
         String signMode = hashAlgorithm + "with" + encryptionAlgorithm;
         Signature sig = provider == null ? Signature.getInstance(signMode) : Signature.getInstance(signMode, provider);