FHIR-Secrets

AWS KMS Secrets retrieval promisified.

Install

yarn add @asymmetrik/fhir-secrets

Prerequisites

• You will need an AWS Account.
• You should have the CiphertextBlob you need to decrypt.
• You can authenticate with AWS.

Usage

Depending on where you are running this code, the setup portion may change. If you have a default AWS profile with region and everything else set, you can use the decrypt function as follows:

const secrets = require('@asymmetrik/fhir-secrets');

// This is output when you encrypt a secret with kms
// https://docs.aws.amazon.com/cli/latest/reference/kms/encrypt.html
let CiphertextBlob = 'somefakeblobcontent=';

// Lets assume this blob contains metadata for a plaintext secret with value foobar
secrets
  .decrypt({ CiphertextBlob })
  .then((secret) => {
    console.log(secret);
    // logs foobar
  })
  .catch(console.error);

If you need to configure the setup process with region or other properties in the client class constructor, you can do so and chain the process.

const secrets = require('@asymmetrik/fhir-secrets');

secrets
  .configure({ region: 'us-east-2' })
  .decrypt({ CiphertextBlob: 'somefakeblobcontent=' })
  .then((secret) => doThingsWithSecret())
  .catch(console.error);

See fhir-secrets tests for more usage examples.

Methods

configure

Configures the service class with any AWS or service class specific configurations.

This takes a single options object. See https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/KMS.html#constructor-property. It returns this so you can immediately call decrypt after configuring it.

decrypt

Wrapper on kms.decrypt but returns a promise which resolves the plain text of the secret.

This takes a single options object. See https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/KMS.html#decrypt-property. The only necessary property from this is CiphertextBlob.