code: public void setKeyManagerFactoryKeyStorePassword(String password) {
          if (password != null) {
              this.keyManagerFactoryKeyStorePassword = password.toCharArray();
          } else {
              this.keyManagerFactoryKeyStorePassword = null;
          }
      }
docs: Sets the password which will be used in the call to
  {@link KeyManagerFactory#init(java.security.KeyStore, char[])} when
  the {@link SSLContext} is created.
  
  @param password the password. Use <code>null</code> to disable password.