Properties resolveSslProperties(Gfsh gfsh, boolean useSsl, File gfPropertiesFile,
      File gfSecurityPropertiesFile, String... sslOptionValues) {

    // first trying to load the sslProperties from the file
    Properties gfProperties = loadProperties(gfPropertiesFile, gfSecurityPropertiesFile);

    // if the security file is a legacy ssl security file, then the rest of the command options, if
    // any, are ignored. Because we are not trying to add/replace the legacy ssl values using the
    // command line values. all command line ssl values updates the ssl-* options.
    if (containsLegacySSLConfig(gfProperties)) {
      return gfProperties;
    }

    // if nothing indicates we should prompt for missing ssl config info, return immediately
    if (!(useSsl || containsSSLConfig(gfProperties) || isSslImpliedBySslOptions(sslOptionValues))) {
      return gfProperties;
    }

    // if use ssl is implied by any of the options, then command option will add to/update the
    // properties loaded from file. If the ssl config is not specified anywhere, prompt user for it.
    for (int i = 0; i < USER_INPUT_PROPERTIES.length; i++) {
      UserInputProperty userInputProperty = USER_INPUT_PROPERTIES[i];
      String sslOptionValue = null;
      if (sslOptionValues != null && sslOptionValues.length > i) {
        sslOptionValue = sslOptionValues[i];
      }
      String sslConfigValue = gfProperties.getProperty(userInputProperty.getKey());

      // if this option is specified, always use this value
      if (sslOptionValue != null) {
        gfProperties.setProperty(userInputProperty.getKey(), sslOptionValue);
      }
      // if option is not specified and not present in the original properties, prompt for it
      else if (sslConfigValue == null) {
        gfProperties.setProperty(userInputProperty.getKey(),
            userInputProperty.promptForAcceptableValue(gfsh));
      }
    }

    return gfProperties;
  }
@param useSsl if true, and no files/options passed, we would still insist on prompting for ssl
       config (considered only when the last three parameters are null)
@param gfPropertiesFile gemfire properties file, can be null
@param gfSecurityPropertiesFile gemfire security properties file, can be null
@param sslOptionValues an array of 9 in this order, as defined in USER_INPUT_PROPERTIES
@return the properties
geode-gfsh/src/main/java/org/apache/geode/management/internal/cli/commands/ConnectCommand.java