Adaptive MFAをカスタマイズする

exports.onExecutePostLogin = async (event, api) => {
  if (event.authentication && event.authentication.riskAssessment) {
    event.authentication.riskAssessment = {
      confidence: 'low' | 'medium' | 'high' | 'neutral',
      version: '1',
      assessments: {
        UntrustedIP: {
          confidence: 'low' | 'medium' | 'high' | 'neutral',
          code: 'not_found_on_deny_list' | 'found_on_deny_list',
          details: { // only if 'found_on_deny_list'
            ip: '192.168.1.1',
            matches: '192.168.0/64',
            source: 'firehol',
            category: 'abuse'
          }
        },
        NewDevice: {
          confidence: 'low' | 'medium' | 'high' | 'neutral',
          code: 'match' | 'partial_match' | 'no_match',
          details: {
            device: 'known' | 'unknown',
            useragent: 'known' | 'unknown',
          }
        },
        ImpossibleTravel: {
          confidence: 'low' | 'medium' | 'high' | 'neutral',
          code: 'missing_geoip', | 'anonymous_proxy' | 'unknown_location' | 'initial_login' | 'location_history_not_found' | 'invalid_travel' | 'minimal_travel_from_last_login' | 'impossible_travel_from_last_login' | 'substantial_travel_from_last_login' | 'travel_from_last_login'
        } 
      },
       PhoneNumber: {
          code: "requires_verification | ok",
          confidence: "low | medium | high | neutral",
          details: {
	        	lineType: "FIXED_LINE | MOBILE | FIXED_LINE_OR_MOBILE | TOLL_FREE | PREMIUM_RATE | SHARED_COST | VOIP | PERSONAL_NUMBER | PAGER | UAN | UNKNOWN"
	            isValid: true | false,
		        countryCode: 1,
		        number: "+12223334444"
        }
      }
    };
  }
}

/**
* Handler that will be called during the execution of a PostLogin flow.
*
* @param {Event} event - Details about the user and the context in which they are logging in.
* @param {PostLoginAPI} api - Interface whose methods can be used to change the behavior of the login.
*/
exports.onExecutePostLogin = async (event, api) => {
  if (event.authentication && 
      event.authentication.riskAssessment && 
      event.authentication.riskAssessment.assessments.NewDevice) {

  // Example condition: prompt MFA only based on the NewDevice 
    // confidence level, this will prompt for MFA when a user is logging in 
    // from an unknown device.
    let shouldPromptMfa;

    switch (event.authentication.riskAssessment.assessments.NewDevice.confidence) {
      case 'low':
      case 'medium':
        shouldPromptMfa = true;
        break;
      case 'high':
        shouldPromptMfa = false;
        break;
      case 'neutral':
        // When this assessor has no useful information about the confidence, 
        // do not prompt MFA.
        shouldPromptMfa = false;
        break;
    }

      // It only makes sense to prompt for MFA when the user has at least one 
      // enrolled MFA factor.
    const canPromptMfa = event.user.multifactor && event.user.multifactor.length > 0;

    if (shouldPromptMfa && canPromptMfa) {
      api.multifactor.enable('any', { allowRememberBrowser: true });
    }
  }
};

/**
* Handler that will be called during the execution of a PostLogin flow.
*
* @param {Event} event - Details about the user and the context in which they are logging in.
* @param {PostLoginAPI} api - Interface whose methods can be used to change the behavior of the login.
*/
exports.onExecutePostLogin = async (event, api) => {
  if (!event.user.multifactor || event.user.multifactor.length == 0) {
    api.multifactor.enable('any', { allowRememberBrowser: true });
  }
};

exports.onExecutePostLogin = async (event, api) => {
  const { riskAssessment } = event.authentication || {};
  const riskIsMedium = riskAssessment && riskAssessment.confidence === 'medium';

  if (riskIsMedium) {
    // ....
  }
}

exports.onExecutePostLogin = async (event, api) => {
  const { riskAssessment } = event.authentication || {};
  const riskIsMediumOrHigh = riskAssessment && 
                                  (riskAssessment.confidence === 'high' || 
                                   riskAssessment.confidence === 'medium');

  if (riskIsMediumOrHigh) {
    // ...
  }
}

exports.onExecutePostLogin = async (event, api) => {
  const { riskAssessment } = event.authentication || {};
  const riskIsLow = riskAssessment && riskAssessment.confidence === 'low';

  if (riskIsLow) {
    // log(externalDatabase, riskAssessment);
  }
}

exports.onExecutePostLogin = async (event, api) => {
  const { riskAssessment } = event.authentication || {};
  const { ImpossibleTravel } = riskAssessment && riskAssessment.assessments;

  if (ImpossibleTravel.code === 'impossible_travel_from_last_login') {
    // ...
  }
}

exports.onExecutePostLogin = async (event, api) => {
  const { riskAssessment } = event.authentication || {};
  const { ImpossibleTravel } = riskAssessment && riskAssessment.assessments;

  if (ImpossibleTravel.code === 'impossible_travel_from_last_login') {
    return api.access.deny('Login blocked due to impossible travel detected.')
  }
}