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Test authentication of Lambda using Cognito and Azure AD via OpenID Connect

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Lambda, Cognito, Azure AD, OpenId Connect Demo

This project offers a demo of how to leverage the following tools for API and web app authentication:

  • AWS Lambda
  • AWS Cognito
  • Azure Active Directory
  • OpenId Connect

The Lambda is developed in Python and deployed via the AWS CDK.

CDK

The cdk.json file tells the CDK Toolkit how to execute your app.

This project is set up like a standard Python project. The initialization process also creates a virtualenv within this project, stored under the .venv directory. To create the virtualenv it assumes that there is a python3 (or python for Windows) executable in your path with access to the venv package. If for any reason the automatic creation of the virtualenv fails, you can create the virtualenv manually.

To manually create a virtualenv on MacOS and Linux:

$ python3 -m venv .venv

After the init process completes and the virtualenv is created, you can use the following step to activate your virtualenv.

$ source .venv/bin/activate

If you are a Windows platform, you would activate the virtualenv like this:

% .venv\Scripts\activate.bat

Once the virtualenv is activated, you can install the required dependencies.

$ pip install -r requirements.txt

At this point you can now synthesize the CloudFormation template for this code.

$ cdk synth

To add additional dependencies, for example other CDK libraries, just add them to your setup.py file and rerun the pip install -r requirements.txt command.

Useful commands

  • cdk ls list all stacks in the app
  • cdk synth emits the synthesized CloudFormation template
  • cdk deploy deploy this stack to your default AWS account/region
  • cdk diff compare deployed stack with current state
  • cdk docs open CDK documentation

Prerequisites

You will need to create your Cognito User Pool and configure the federation to Azure AD. I recommend the following article to help you: https://dev.to/danielbayerlein/how-to-use-azure-ad-b2c-as-idp-for-amazon-cognito-28nj

You will need to define the Cognito ARN (replace with your ARN)

export COGNITO_ARN='arn:aws:cognito-idp:us-east-1:123456789:userpool/us-east-1_abc123'

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