Superagent-AWS-Sign

Superagent plugin to sign AWS requests and invoke AWS resources protected by IAM roles. It uses the AWS Signature Version 4 process to add authentication information to requests.

Installation

Install the package from npm:

npm install @certible/superagent-aws-sign

Usage

Import the AwsSignRequest class and create a new instance. After building your request use the use() method from Superagent to your instance to the request:

const AwsSignRequest = require('@certible/superagent-aws-sign');
const signer = new AwsSignRequest();
await signer.setCredentialsFromConfig('default');
const response = await superagent
  .get('api-gateway-url')
  .use(signer.add()); // 'execute-api' is the default service of the class

TypeScript

Package is written with JSDoc comments. For TypeScript users you may need to allow JavaScript in your tsconfig.json file.

{
  "compilerOptions": {
    "allowJs": true,
    "maxNodeModuleJsDepth": 1
  }
}

Setting AWS Region

You can set the AWS region for the request using the setRegion method:

const region = 'us-west-2';
signer.setRegion(region);

Setting AWS Credentials

You can set AWS credentials manually or load them from the local ~/.aws/credentials file.

Manually setting credentials

const credentials = {
  accessKeyId: 'YOUR_ACCESS_KEY',
  secretAccessKey: 'YOUR_SECRET_ACCESS_KEY',
  sessionToken: 'OPTIONAL_SESSION_TOKEN',
};

signer.setCredentials(credentials);

Loading credentials from config

const profile = 'YOUR_AWS_PROFILE_NAME';

signer.setCredentialsFromConfig(profile)
  .then((credentials) => {
    // Credentials loaded successfully
  })
  .catch((error) => {
    // Error loading credentials
    console.error(error);
  });

Assuming a Role

To assume a role, use the assumeRole method:

const params = {
  RoleArn: 'ARN_OF_THE_ROLE',
  RoleSessionName: 'SESSION_NAME',
};

signer.assumeRole(params)
  .then(() => {
    // Role assumed successfully
  })
  .catch((error) => {
    // Error assuming role
    console.error(error);
  });

Removing Role

To remove a previously assumed role and revert to using the original credentials, use the removeRole method:

signer.removeRole();

Testing

To run the test you need to setup the SAM resources, see template.yaml for details. Add the generated cloudformation output to the .env file, see template .env.template for details.

sam build
sam deploy --guided

Honorable Mentions

This project is based on npmjs.com/package/superagent-aws-signed-request and was updated to meet our needs.

License

This project is licensed under the MIT License.