Question

我有一个cognito用户池和身份池。我在用户池中创建了一个用户。我为该用户获取了令牌，即使用lambda 访问，刷新，id令牌。现在我想要生成临时凭证，即访问密钥并为该用户分配访问密钥以访问aws服务。我怎么能这样做？这是我用来生成令牌的一段代码。

var authenticationDetails = new cognito.AuthenticationDetails(authenticationData);

    var userData = {
        Username : '*****',
        Pool : userPool
    };

var cognitoUser = new cognito.CognitoUser(userData);
    cognitoUser.authenticateUser(authenticationDetails, {
        onSuccess: function (result) {
console.log(result);

我应该做些什么改变才能获得凭据？谢谢....

Answer 1

在下面的代码中，我正在检索基于联邦身份的令牌以及临时凭证。

var data = {
  UserPoolId: YOURUSER_POOL_ID,
  ClientId: YOURAPP_CLIENT_ID,
};
var userPool = new cognito.CognitoUserPool(data);
var cognitoUser = userPool.getCurrentUser();
if (cognitoUser != null) {
  cognitoUser.getSession(function(err, session) {
    if (err) {
      console.log(err);
      return;
    }

    console.log('session validity: ' + session.isValid());
    console.log('session Identity token: ' + session.getIdToken().getJwtToken());

    AWS.config.region = YOURREGION;
    AWS.config.credentials = new AWS.CognitoIdentityCredentials({
      IdentityPoolId : YOURIDENTITY_POOL_ID, 
      Logins : {
        // Change the key below according to the specific region your user pool is in.
        'cognito-idp.YOURREGIONNAME.amazonaws.com/YOURUSERPOOLID': session.getIdToken().getJwtToken()
      }
    });

    AWS.config.credentials.get(function(err,data) {
      if (!err) {
        var id = AWS.config.credentials.identityId;
        var key = AWS.config.credentials.accessKeyId;
        var secretkey = AWS.config.credentials.secretAccessKey;
        var sessionToken = AWS.config.credentials.sessionToken;
        console.log('Cognito Identity ID '+ id);
        console.log('Cognito Key '+ key);
        console.log('Cognito Secret Key '+ secretkey);
        console.log('Cognito SessionToken '+ sessionToken);
      }
    });
  });
}

根据您的需要更改必要的参数。

希望对您有帮助

如何使用Cognito Identity pool生成临时凭证以访问aws服务？

1 个答案: