fixed exposure

Author: dghgit

core/src/main/java/org/bouncycastle/pqc/crypto/sphincsplus/HarakaS512Digest.java

@@ -8,7 +8,7 @@
  * Haraka512-256 with reference to Python Reference Impl from: https://github.com/sphincs/sphincsplus
  * </p>
  */
-public class HarakaS512Digest
+class HarakaS512Digest
     extends HarakaSBase
     implements Digest
 {

core/src/main/java/org/bouncycastle/pqc/crypto/sphincsplus/SPHINCSPlusEngine.java

@@ -516,9 +516,9 @@ protected byte[] bitmask(byte[] pkSeed, ADRS adrs, byte[] m1, byte[] m2)
     static class HarakaSEngine
         extends SPHINCSPlusEngine
     {
-        public HarakaSXof harakaSXof;
-        public HarakaS256Digest harakaS256Digest;
-        public HarakaS512Digest harakaS512Digest;
+        private HarakaSXof harakaSXof;
+        private HarakaS256Digest harakaS256Digest;
+        private HarakaS512Digest harakaS512Digest;
 
         public HarakaSEngine(boolean robust, int n, int w, int d, int a, int k, int h)
         {