请求中包含的安全令牌无效.Aws js sdk

Question

我在AWS论坛发帖

我使用的是aws-js-sdk v2.2.3，代码如下。我得到填充凭据的数据。当我尝试使用凭据时，我得到了它们无效的错误。我正在使用开发人员身份验证流。我同时扮演着Auth &UnAuth。我的身份池看起来是正确的。信任关系看起来似乎指向正确的身份池id。S3的Auth角色附加了一些策略;DynamoDB。我很茫然。任何帮助都会很感激。

客户端:

var cognitoidentity = new AWS.CognitoIdentity({region: 'us-east-1'});
    var params = {
      IdentityId: user.cognito_id,
      Logins: {
    'cognito-identity.amazonaws.com': user.cognito_token
      }
    };
    cognitoidentity.getCredentialsForIdentity(params, function(err, data) {
      if (err) console.log(err, err.stack); // an error occurred
      else console.log(data.Credentials);
    });

I console.log Id &SecretKey和它们被填入。

var aws_creds = StateService.get('user').aws_creds;
console.log(aws_creds.AccessKeyId);
console.log(aws_creds.SecretKey);
AWS.config.update({ accessKeyId: aws_creds.AccessKeyId,
            secretAccessKey: aws_creds.SecretKey,
            endpoint: ENV.aws_dyndb_endpoint,
            region: 'us-east-1'
            });
var dynamodb = new AWS.DynamoDB();

console.log("user obj: ", StateService.get('user'));
var params = {
    TableName: games_table_name,
    KeyConditionExpression: "Id = :v1",
    ExpressionAttributeValues: {
      ":v1": {"N": id}
    }
};
return dynamodb.query(params);

我的解决方案
我想到的是显式刷新凭据，而不是在创建DynamoDb对象时惰性地获取凭据。这是我使用的函数，它返回一个承诺&解析何时刷新凭据。

refresh: function() {
    var deferred = $q.defer();
    AWS.config.region = 'us-east-1'; 
    AWS.config.credentials = new AWS.CognitoIdentityCredentials({
      IdentityPoolId: COGNITO_IDENTITY_POOL_ID, 
      IdentityId: COGNITO_ID, 
      Logins: 'cognito-identity.amazonaws.com'
    });
    AWS.config.credentials.refresh(function(error) {
      if ((error === undefined) || (error === null)) {
        $log.debug("Credentials Refreshed Success: ", AWS.config.credentials);
        var params = {
          region: 'us-east-1',
          apiVersion: '2012-08-10',
          credentials: AWS.config.credentials
        };
        $rootScope.dynamodb = new AWS.DynamoDB({params: params});
        deferred.resolve();
      }
      else {
        $log.debug("Error refreshing AWS Creds:, ", error);
        deferred.reject(error);
      }
    });
    return deferred.promise;
}

Answer 1

如果您想使用Cognito凭据调用其他AWS服务，我建议您使用Javascript SDK中的高级AWS.CognitoIdentityCredentials对象，而不是直接调用服务API。

你可以在Cognito开发者指南中找到更多关于如何初始化和使用AWS.CognitoIdentityCredentials的信息:开发者身份验证

艾伯特

Answer 2

流程是这样的:您向CognitoIdentityCredentials请求IdentityId, IDentityId应该跟踪跨设备和跨身份提供商(Facebook, Google, TWitter等)的用户，然后您使用该ID请求附加到您的极点CognitoIdentity的角色，在您获得令牌后，您要求STS.assumeRoleWithWebIdentity提供临时凭据，并将适当的角色附加到您的极点。

下面是我如何做的一个例子:

// set the Amazon Cognito region
AWS.config.region = 'us-east-1';
// initialize the Credentials object with our parameters
AWS.config.credentials = new AWS.CognitoIdentityCredentials({
    IdentityPoolId: 'us-east-1:YMIDENTITYPOLEID',
});
// We can set the get method of the Credentials object to retrieve
// the unique identifier for the end user (identityId) once the provider
// has refreshed itself
AWS.config.credentials.get(function(err) {
    if (err) {
        console.log("Error: "+err);
        return;
    }
    console.log("Cognito Identity Id: " + AWS.config.credentials.identityId);
        params = {
            IdentityId: AWS.config.credentials.identityId
        }
    // Other service clients will automatically use the Cognito Credentials provider
    // configured in the JavaScript SDK.
        // Get the Role associated with the id coming from the pool
        var cognitoidentity = new AWS.CognitoIdentity();
        cognitoidentity.getOpenIdToken(params, function(err, data) {
            if (err){
                console.log(err, err.stack); // an error occurred
            }else{
                        // Get temporoarly credientials form STS to access the API
                        var params = {
                            RoleArn: 'ROLE_OF_YOUR_POLE_ARN', /* required */
                            RoleSessionName: 'WHATEVERNAME', /* required */
                            WebIdentityToken: data.Token, /* required */
                        };
                        var sts = new AWS.STS()
                        console.log(data);           // successful response
                        console.log(data.Token)
                        sts.assumeRoleWithWebIdentity(params, function(err, data) {
                                if (err){
                                        console.log(err, err.stack); // an error occurred
                                }else{
                                        console.log(data);           // successful response
                                        // Now we need these credentials that we got for this app and for this user
                                        // From here we can limit the damage by
                                        // Burst calling to the API Gateway will be limited since we now that this is a single user on a single device
                                        // If suspicious activities we can drop this user/device
                                        // The privileges are limited since the role attached to this is only the API GateWay calling
                                        // This creds are temporary they will expire in 1h
                                        var apigClient = apigClientFactory.newClient({
                                            accessKey: data.Credentials.AccessKeyId,
                                            secretKey: data.Credentials.SecretAccessKey,
                                            sessionToken: data.Credentials.Token, //OPTIONAL: If you are using temporary credentials you must include the session token
                                            region: AWS.config.region // OPTIONAL: The region where the API is deployed, by default this parameter is set to us-east-1
                                        });
                                        // Call the get to test
                                        apigClient.deviceGet({}, {})
                                    .then(function(result){
                                        //This is where you would put a success callback
                                                console.log(result)
                                    }).catch( function(result){
                                        //This is where you would put an error callback
                                    });
                                }
                        });
            }
        });
});

注意:这是一个访问API网关服务的测试，但是访问其他服务并没有什么不同，这取决于你配置它和它附加的服务。

如果你有一个在IAM中创建的用户的凭据，你不需要临时令牌，但如果你使用这个流，你必须包含它。

另一点，限制对您极点上服务的访问，请记住这是一个公开给定的密钥，每个人都可以使用它来访问您的东西。

。使用assumption . olewithwebidentity是因为我们在web上，在AWS JS SDK中，如果你使用iOS或android/java或Boto，你必须使用sts . assumption . ole。