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@seek/kms-config

v1.0.0

Published

Decrypt KMS encrypted values in config files

Downloads

49

Readme

config ⇒ Promise

Decrypt KMS encrypted values in config files. This tool is optimised for use in node 4.3.2 AWS Lambda functions but should work in any modern node runtime.

Install

npm install --save @seek/kms-config

Usage

The user that is running the lambda will need kms:Decrypt permission to the master key used for generating the ciphertext. Warning* To reduce KMS overhead you should just call this once and cache the result if possible.

myConfig.json

{
    "foo" : "bar",
    "kms" { //All the values in this object are expected to be KMS ciphertext 
        "secretToHappiness" : "base64_encoded_ciphertext"
    }
}

handler.js

const myConfig = require('./myConfig')
const config  = require('@seek/kms-config')(myConfig)

config.then(resolved => {
    console.log(resolved.foo) // "bar"
    console.log(resolved.kms.secretToHappiness) // "eat more chocolate"
}).catch(err => {
    console.log(err, "Oh dear perhaps you are missing KMS permissions")
})
...

Returns: Promise - A promise to the loaded config which will be resolved with all kms values decrypted.

| Param | Type | Description | | --- | --- | --- | | config | Object | A config object which may contain a child kms object who's values are KMS ciphertext |