code: @Override
      public void getUserSessionKey ( CIFSContext tc, byte[] chlng, byte[] dest, int offset ) throws SmbException {
          if ( this.hashesExternal ) {
              return;
          }
          super.getUserSessionKey(tc, chlng, dest, offset);
      }
docs: {@inheritDoc}
  
  @see jcifs.smb.NtlmPasswordAuthenticator#getUserSessionKey(jcifs.CIFSContext, byte[], byte[], int)