Question

我有一个使用Cognito的文件服务器，因此用户可以通过使用基本身份验证或OAuth2.0授权代码流进行身份验证来访问。

我希望外部应用能够使用客户端凭据流进行身份验证，然后才能模拟用户。有没有办法用Cognito做到这一点？

Answer 1

我能够通过为Cognito触发器创建自定义lambda来做到这一点：定义身份验证质询，创建身份验证质询和验证身份质询。

我的要求是我希望后端使用secret来获取任何Cognito用户的访问和刷新令牌。

定义身份验证挑战Lambda

exports.handler = async event => {
  if (
    event.request.session &&
    event.request.session.length >= 3 &&
    event.request.session.slice(-1)[0].challengeResult === false
  ) {
    // The user provided a wrong answer 3 times; fail auth
    event.response.issueTokens = false;
    event.response.failAuthentication = true;
  } else if (
    event.request.session &&
    event.request.session.length &&
    event.request.session.slice(-1)[0].challengeResult === true
  ) {
    // The user provided the right answer; succeed auth
    event.response.issueTokens = true;
    event.response.failAuthentication = false;
  } else {
    // The user did not provide a correct answer yet; present challenge
    event.response.issueTokens = false;
    event.response.failAuthentication = false;
    event.response.challengeName = 'CUSTOM_CHALLENGE';
  }
  return event;
};

创建身份验证挑战Lambda

exports.handler = async event => {
  if (event.request.challengeName == 'CUSTOM_CHALLENGE') {
    // The value set for publicChallengeParameters is arbitrary for our
    // purposes, but something must be set
    event.response.publicChallengeParameters = { foo: 'bar' };
  }
  return event;
};

验证身份验证挑战Lambda

exports.handler = async event => {
  if (event.request.challengeName == 'CUSTOM_CHALLENGE') {
    // The value set for publicChallengeParameters is arbitrary for our
    // purposes, but something must be set
    event.response.publicChallengeParameters = { foo: 'bar' };
  }
  return event;
};

然后，我能够使用amazon-cognito-identity-js使用一些JS来提供机密并获得令牌：

var authenticationData = {
  Username : 'username'
};
var authenticationDetails = new AmazonCognitoIdentity.AuthenticationDetails(authenticationData);
var poolData = {
  UserPoolId : '...', // Your user pool id here
  ClientId : '...' // Your client id here
};
var userPool = new AmazonCognitoIdentity.CognitoUserPool(poolData);
var userData = {
  Username : 'username',
  Pool : userPool
};
var cognitoUser = new AmazonCognitoIdentity.CognitoUser(userData);

cognitoUser.setAuthenticationFlowType('CUSTOM_AUTH');

cognitoUser.initiateAuth(authenticationDetails, {
  onSuccess: function(result) {
    // User authentication was successful
  },
  onFailure: function(err) {
    // User authentication was not successful
  },
  customChallenge: function(challengeParameters) {
    // User authentication depends on challenge response
    var challengeResponses = 'secret'
    cognitoUser.sendCustomChallengeAnswer(challengeResponses, this);
  }
});

在AWS Cognito中模拟用户

1 个答案: