The user's browser follows the redirect and loads the Cognito hosted UI with a login screen. triggers, Example: Adding a header based You just need to install Docker to develop this module. Traditionally HTTP Basic Authentication for CloudFront needed to be implemented via Lambda@Edge. It would be trivial to query cognito, a dynamodb or any other type of storage here. From Policy Templates select "Basic Lambda@Edge permissions (for CloudFront trigger)" Click "Create function" Once your Lambda is created take the following code and paste it in to the index.js file of the Function Code section - you can update the username and password you want to use by changing the authUser and authPass variables: The following example shows how to generate an HTTP redirect. Built on Forem the open source software that powers DEV and other inclusive communities. This solution uses Amazon CloudFront to reduce latency and accelerate performance. The following example shows how to generate an HTTP redirect response with a country-specific URL and return Lastly by using Lambda@Edge and Amazon CloudFront, you have less origin infrastructure to manage than with traditional CDNs. default. Choose Author from scratch. For more information, see Lambda@Edge can help you block unwanted bots at the edge, and let the authorized traffic go through. Work fast with our official CLI. Under, You can type in any Description, then click on. Now let's install what we need to deploy our service: On top of that, hooking a Lambda@Edge function into the origin request allows you to add credentials to authenticate at the origin. For more information, see CloudFront adds the CloudFront-Viewer-Country header after the viewer request event. You signed in with another tab or window. Scroll up to top and click on Add triggers. A tag already exists with the provided branch name. To use this example, you must do the following: Configure your distribution to cache based on the CloudFront-Viewer-Country header. I am completely new to NodeJS. First, navigate to CloudFormation stack you created earlier. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. If nothing happens, download Xcode and try again. This is a Terraform module that creates AWS Lambda@Edge resources to protect CloudFront distributions with Basic Authentication. Crypto verification ensures that JWT was created by the trusted party. Thanks for letting us know this page needs work. For example, you can trigger a Lambda function that runs code to prioritize premium and paid users on your e-commerce website as the traffic surges during shopping sales. A custom lambda function intercepts all requests to the CloudFront distribution and checks them for valid basic auth credentials as follows: If the request doesn't have an Authorization header, it returns a 401 Unauthorized response to the client with a WWW-Authenticate: Basic header to trigger Basic Auth prompt the client browser. This API builds on the existing Lambda Runtime API, which enables you to bring custom runtimes to Lambda. In the Basic auth mode, credentials are simply a combo of [username]: [password], and base64-encoded, with " Basic " prepended to indicate the challenge type. You should see an alert dialog popup noting that Lambda@Edge has blocked your access: To gain access to private data, you have to authenticate first. Lastly, the Lambda@Edge function will decode the JWT and verify its signature. Would you mind visiting edge://policy and looking to see whether the PC in question has an AuthSchemes policy set? The examples in this section include ways that you can use Lambda@Edge with query They can still re-publish the post if they are not suspended. Download ZIP Basic HTTP Authentication for CloudFront with Lambda@Edge Raw lambda-basic-auth.js 'use strict'; exports.handler = (event, context, callback) => { // Get request and request headers const request = event.Records[0].cf.request; const headers = request.headers; // Configure authentication const authUser = 'user'; const authPass = 'pass'; If you have questions about or issues implementing this solution, start a new thread in the CloudFront Forum, Cognito Forum or contact AWS Support. In order to fully demonstrate the functionality, the solution also uses Amazon Cognito and Amazon S3. With Lambda@Edge, you can customize the content delivered through the Amazon CloudFront CDN, and you can customize your compute resources and execution time, based on your application performance needs. aws-lambda-edge-basic-auth-terraform. origin, Example: Using an If you add or remove inputs or outputs of this module, you have to update the documentation. Writing and creating a Lambda@Edge function. trigger to update the error status code to 302, Example: Using a request The username and password are hardcoded in the function as authUser and authPass respectively. For Lambda@Edge, the triggering defines where our limitations are going to be. *Duration charges apply to code that runs in the handler of a function as well as initialization code that is declared outside of the handler. The following example shows how to serve different versions of an object based on the type of device that To verify that Lambda@Edge is protecting the private content and blocking unauthorized requests, click onRetrieve Private Databutton. headers. The Lambda@edge function generates an HTTP 302 response to redirect to the Cognito hosted UI. Supported browsers are Chrome, Firefox, Edge, and Safari. headers. Step 2: Create Lambda@Edge Function to Authenticate User Step 3: Create CloudFront Distribution Step 4: Upload Content to S3 Bucket Step 5: Test CloudFront Distribution Step 6: Additional CloudFront Configuration Step 7: Define CNAME DNS Record Step 8: Define SSL Certificate Introduction This documentation was prepared on 2020-04-09. Using Basic Authentication with AWS API Gateway and Lambda Basic authentication is one of the oldest and simplest ways to authenticate HTTP Traffic. If you've got a moment, please tell us how we can make the documentation better. Excellent question anonymous internet person #12339 - no. return to the viewer in the following scenario: The function is triggered in an origin response. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. This is a Terraform module that creates AWS Lambda@Edge resources to protect CloudFront distributions with Basic Authentication. The examples in this section show how you can use Lambda@Edge to generate responses. This function demonstrates how you can update the response status to 200 and generate static body content to The load on your origin servers is also reduced by offloading CPU-intensive operations such as verification of JSON Web Token (JWT) signatures. 6. For Node.js functions, each function must call the callback parameter Topics Example: Adding a header based on a query string parameter Example: Normalizing query string parameters to improve the cache hit ratio Example: Redirecting unauthenticated users to a sign-in page Made with love and Ruby on Rails. In addition, Amazon Cognito supports OAuth 2.0 as an industry standard protocol for authorization, and the sample application in this blog post relies on JSON Web Tokens to authorize access to private content. This solution represents one example of a variety of possible use cases where you can take advantage of Lambda@Edge. From there the lambda can do whatever it needs. Lambda@Edge can read, modify, and delete request headers, including cookies. 3. This function demonstrates how an origin-request trigger can be used to change from a custom origin to an 5. And then associate the function with the distribution, Please note that it's a horrible idea to use this for anything that's actually sensitive. Basic authentication can be added pretty easily to CloudFront distributions using a simple Lambda@Edge function. This entails routing of viewer requests to the nearest edge location, static content caching and optimizations for dynamic content. From a developer's perspective, Lambda@Edge allows Node.js functions to inspect, and modify, requests as they arrive at CloudFront POPs around the world. This article will explain how that can be achieved with the help of Cloudfront and Lambda@Edge. The actual code to perform Basic Authentication is derived from lmakarov/lambda-basic-auth.js. In AWS Lambda code, we will take the request headers and check the user-agent. The CloudFront distributions private behavior is configured to launch a Lambda@Edge function on ViewerRequest event. The web applications static elements are stored in Amazon S3, taking advantage of itsclose integrationwith Amazon CloudFront. Unflagging tastefulelk will restore default visibility to their posts. On July 17, 2017, Amazon released a new AWS Lambda feature named Lambda@Edge. type headers - examples, Content-based dynamic origin 2022, Amazon Web Services, Inc. or its affiliates. This is useful because Amazon S3 cannot handle Authorization headers with JSON Web Tokens. The following example shows how to get the key-value pair of a query string parameter, and then add a header It's also a fun project to get your hands dirty with Lambda@Edge! In the Lambda console, choose Create function. It provides data sovereignty by making sure that data is served from an origin that's in the same CloudFront-Viewer-Country header after the viewer request The following example shows how to redirect users to a sign-in page if they haven't entered their headers, Example: Using an origin-request trigger to change the Amazon S3 origin Region, Example: Using an Copy/paste the following code into the code editor. This function demonstrates how you can modify the body of a POST request generated by an HTML form (web Find out from AWS customers how they are taking advantage of Amazon CloudFront and Lambda@Edge. You can use the following example to test two different versions of an image without Engage with other developers about Amazon CloudFront and Lambda@Edge in the discussion forum. On the next screen, under "Choose the service that will use this role" click "Lambda", then click "Next: Permissions" at the bottom of the screen. Please note that it's a horrible idea to use this for anything that's actually sensitive, it's just a very quick and simple way to add a password requirement for a static website. For example, you might have an HTML form like the following: For the example function that follows, the function must be triggered in a CloudFront viewer request or origin You should never just use code from the web, this is an example of the setup, and may I say thankyou to the original author, it helped me a great deal. LambdaFunctionAssociation. You can import and edit XML files visually using draw.io. Cache based on selected request Implement aws-lambda-edge-basic-auth-terraform with how-to, Q&A, fixes, code snippets. Association. For our initial proof of concept, we checked for basic authentication with a static username/password. Requests with a valid JWT that pass through all the verification steps are sent to the private Amazon S3 bucket. strings before CloudFront forwards requests to your origin: Alphabetize key-value pairs by the name of the parameter. Your request was successfully authorized by Lambda@Edge function and private content is now displayed in your browser. trigger to change the origin domain name based on the country header, Example: Using an origin response For more information, see Cache based on selected request body option, Working with query strings - The examples in this section provide guidance for how you can use Lambda@Edge to change the error status Under the hood, AWS has created a special API that you can use to build your own extension. The purpose of this module is to make it no-brainer to set up AWS resources required to perform Basic Authentication with AWS Lambda@Edge. I created a basic HTTP Authentication for CloudFront with Lambda@Edge in NodeJS. By intelligently mitigating these automated processes, you can help protect your origin infrastructure from unhelpful web crawlers and bots, while improving performance for real users. This is one example of how authorization at edge can improve the security posture of your solution. Browse your URL of CloudFront or the. origin request trigger to gradually transfer traffic from one Amazon S3 bucket to request triggers. By using Lambda@Edge and Kinesis together, you can process real-time streaming data so that you can track and analyze globally-distributed user activity on your website and mobile applications, including click stream analysis. JSON Web Tokens can also be signed using private/public key pairs in order to verify content authenticity and integrity. origin closer to the viewer's country. IncludeBody field to true in Lambda@Edge function source code is located at src/basic-auth.js. If tastefulelk is not suspended, they can still re-publish their posts from their dashboard. Change the case of key-value pairs to lowercase. header. We can set function memory as high as we want, the timeout can be a full 30 seconds (same as an API Gateway event source), and the size of the function code can be up to 50 MB. Amazon CloudFront is a global content delivery network (CDN) service that securely delivers data, videos, applications, and APIs to your viewers with low latency and high transfer speeds. This allows you to seamlessly release updates to your website to improve your website'soverall experience while continuing to deliver responsiveness for users. Configuring a Lambda@Edge function to process viewer requests allows you to authenticate a user, for example, by using basic authentication or JWT. Learn more. It is not enabled by headers. You can add new functionalities without making any changes to your existing applications running at your origin. Search for and select the "AWSLambdaExecute" role: Then click "Next: Review" at the bottom of the page. DEV Community A constructive and inclusive social network for software developers. All rights reserved. If you're streaming video but you don't have rights to stream the content in a specific country, you You can generate HTTP responses for viewer request and origin request events. To use the Amazon Web Services Documentation, Javascript must be enabled. In this blog post, you learned to use Lambda@Edge to implement authorization based on JSON Web Tokens issued by Amazon Cognito. Posted on Oct 16, 2020 This function demonstrates how you can gradually transfer traffic from one Amazon S3 bucket to another, in a All rights reserved. string parameters to improve the cache hit ratio, Example: Redirecting unauthenticated Lambda@Edge is a feature of Amazon CloudFront that lets you run code closer to users of your application, which improves performance and reduces latency. ARN value should end with :1 (version 1). This can be used to disable BASIC auth. By using Lambda@Edge to dynamically route requests to different origins based on different viewer characteristics, you can balance the load on your origins, while improving the performance for your users. It needs to be transpiled by Babel and minified by UglifyJS before zip-compressed by Terraform. The auth backend we need is Google (any user with a valid @domain.example.com gmail address is allowed to access the site). Click on the link and you will be redirected to the Lambda console, with the Lambda function already open, similar to this: Click on that function to open its properties. The browser displays the data from the returned JSON file. The response status from the origin server is an error status code (4xx or 5xx). It creates an S3 bucket, an S3 object (index.html), and a CloudFront distribution protected with Basic Authentication, enough to confirm that this module protects resources with Basic Authentication. Do note that you need to set the environment variable CLOUDFRONT_DISTRIBUTION_ID to the id of your distribution. See example below: You can now associate published Lambda function with the CloudFront distribution. Click on the link and you will be redirected to the CloudFront console, with the Lambda function already open, similar to this: 2022, Amazon Web Services, Inc. or its affiliates. It takes approximately 15 minutes for the CloudFormation stack to complete. In this tutorial you can find a node.js project called basic-auth. Click onRetrieve Private Databutton and review results: Success! strings. Amazon S3 buckets will contain the web application as well as the private data. The source code for this solution is available on GitHub. response), Generating HTTP responses in With Lambda@Edge, you don't have to provision or manage infrastructure in multiple locations around the world. CloudFront will invoke Lambda@Edge in response to the incoming ViewerRequest event. Once the user enters a valid username and password, Cognito returns an HTTP 302 response to redirect to the cloudonaut.io backend ( https://cloudonaut.io/api . Finally, click onYes, Edit to submit changes to your CloudFront distribution. example: If you have country-specific subdomains, such as us.example.com and tw.example.com, you can generate If yes: just return from the function, if no: make basic auth stuff. For a function to be used by Lambda@Edge, it must be published first. In this case, the origin is the private content Amazon S3 bucket. Finally, there are security benefits such as filtering out unauthorized requests before they reach your origin infrastructure. After passing all of the verification steps, Lambda@Edge strips out the Authorization header and allows the request to pass through to designated origin for CloudFront. The purpose of this module is to make it no-brainer to set up AWS resources required to perform Basic Authentication with AWS Lambda@Edge. The following diagram depicts a high-level overview of this posts solution: Lets dive deeper into the data flow for this solution. Tests for the handler is located at test/ directory and executed in build.sh. Generating HTTP responses in Changes will take 10-15 minutes to complete. This function demonstrates how an origin-request trigger can be used to change the custom origin from which With you every step of your journey. The viewers web browser is redirected to Amazon Cognito custom UI page to sign up and authenticate. It has 1 star(s) with 0 fork(s). What can you build with Lambda@Edge and Amazon CloudFront? Updated on Mar 16, 2021. Click here to return to Amazon Web Services homepage, Intelligently Route Across Origins and Data Centers. The minimal example is located at examples/minimal . Initially, I had the user and the password hardcoded, and this worked properly. To test this architecture, you will first validate the security provided by the Lambda@Edge function against an unauthenticated session. Once unsuspended, tastefulelk will be able to comment and publish posts again. Amazon CloudFront routes the request to the nearest AWS edge location. For those valid requests, the function takes advantage of another Lambda@Edge capability: header manipulation. Find answers to the most common questions. If you update the Lambda function source code, you also need to update the function code in the module. Let's start by creating our serverless app by initializing a new project in an empty folder with npm init -y. credentials. This is a Terraform module that creates AWS Lambda@Edge resources to protect CloudFront distributions with Basic Authentication. Diagrams are located at diagrams/ directory. In the end it turned out we didn't actually need to support basic authentication at all on the S3 bucket, there was a plugin that allowed the bucket to be accessed using S3 credentials directly and the CloudFront distribution and Lambda@Edge were no longer required. the content is fetched, based on request properties. Pass a map composed of 'user' and 'password'. form). header. The idea here is that we can use Lambda@Edge to do our actual authentication by intercepting requests by hooking into the Cloudfront request lifecycle. The function takes advantage of response-generating capability of Lambda@Edge to return immediate responses for invalid requests without causing additional load on the origin server. information, see Generating HTTP responses in Are you sure you want to hide this comment? Now, let's describe our beautiful serverless service in a serverless.yml a little something like this: Once we deploy this service, the Lambda function we just created will be attached to the Cloudfront distribution in front of the static website. The project is about Lambda@Edge for basic auth.. basic-auth node.js project has the following dependencies. For more information, see Cache based on selected request Accessing the request body by choosing the include based on those values. For more information, see Updating HTTP responses in origin response option in the distribution's Lambda function association. To use these examples, you must enable the include body Now add an if/else to check if the IP is in your allowList. See the following sections for examples of using Lambda functions with CloudFront. You will be presented with Amazon Cognito Custom UI: Click onSign upand follow instructions to register a new username, password, and verify your email address. creating redirects or changing the URL. code of conduct because it is harassing, offensive or spammy. After authentication, Cognito generates and cryptographically signs a JWT then responds with a redirect containing the JWT embedded in the URL. But Mr. Elk, can't someone just access my website by going straight to the S3 resource, bypassing Cloudfront? AWS support for Internet Explorer ends on 07/31/2022. It has a neutral sentiment in the developer community. The code, related scripts and CloudFormation templates can be found in the GitHub repository cloudfront-basic-authorizer. This function demonstrates how an origin-request trigger can be used to change the Amazon S3 origin from which Not to mention this limits you to a single, static username/password combo which is in and of itself insecure. origin request trigger to change from a custom origin to an Amazon S3 cloudfront lambda-edge authorization authentication lambda oauth2 openid-connect jwt login google aws-lambda-edge-basic-auth-terraform. origin- events allow the most freedom. We're a place where coders share, stay up-to-date and grow their careers. You must configure your distribution to cache based on the CloudFront-Viewer-Country While this is a. event, so to use this example, you must make sure that the function File Path:\app.js File Content: Copy The function is triggered in a CloudFront viewer request or origin request. Most upvoted and relevant comments will be first. Select Cloudfront from the drop-down list and click on Deploy to Lambda@Edge 4. Not if you make sure to restrict access to the S3 files using an Origin Access Identity (which you should probably have anyway). This enables you to do everything from simple HTTP request and response processing at the edge to more advanced functionality, such as website security, real-time image transformation, intelligent bot mitigation, search engine optimization, and more. Get started building with Lambda@Edge in the AWS Console. object based on the device, Cache based on selected request In general, this is expected to work for cases where the top-level site prompts for authentication. You can customize your users' experience by transforming images on the fly based on the user characteristics. Credentials for Basic Authentication. Here is what you can do to flag tastefulelk: tastefulelk consistently posts content that violates DEV Community 's send a cookie with one of the expected values, the example randomly assigns the When a request comes in to CloudFront, it will invoke the lambda if the cache is invalid. users to a sign-in page, Caching content based on query string parameters, Example: Redirecting viewer In our case we want it to check for a cookie and if the cookie isn't present redirect to Auth0. Now let's install what we need to deploy our service: Other than having a super catchy name, the serverless-lambda-edge-pre-existing-cloudfront plugin allows us to hook up a Lambda@Edge function to a pre-existing Cloudfront distribution. If you don't want to take care of . The following example shows how to improve your cache hit ratio by making the following changes to query The check occurs in a lambda. request triggers, Updating HTTP responses in origin response If the viewer doesn't The purpose of this module is to make it no-brainer to set up AWS resources required to perform Basic Authentication with AWS Lambda@Edge. Once unpublished, this post will become invisible to the public and only accessible to Sebastian Bille. The viewers browser will then send the JWT in the Authorization header. update the S3 bucket domain name to a bucket in a Region that is closer to the Please refer to your browser's Help pages for instructions. A Terraform module that creates AWS Lambda@Edge resources to protect CloudFront distributions with Basic Authentication. Widen / cloudfront-auth 600.0 28.0 139.0. lambda-edge,An AWS CloudFront [email protected] function to authenticate requests using Google Apps, Microsoft, Auth0, OKTA, and GitHub login. You can trigger a Lambda function to add HTTP security headers on all origin responses without having to modify your application code on your origin. 'use strict'; exports.handler = (event, context, callback) => { // Get . 2. . S3 buckethtml BasicwebS3bucket CloudFront Origin Settings Origin Domain NamewebS3bucket controlled way. JSON Web Token (JWT) is a JSON-based open standard for creating access tokens which assert a series of claims as a JSON object. If the user-agent is from desktop, we will change the response to display message as "DESKTOP : Welcome to AWS Lambda with Cloudfront!" and if device the message will be "MOBILE DEVICES : Hello from Lambda@Edge!".

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