NestJS API Keys


A NestJS API keys utility which allows you to secure APIs using an API Key based system.

This library only works in APIs made with NestJS.

0. Installing

Install the package using:

``bash
npm i nestjs-api-keys
`

or

`bash
yarn add nestjs-api-keys
`

1. Setup

First, you need to register the ApiKeysModule. You can do that by going to your AppModule and calling the register static method of the ApiKeysModule class:

`ts
@Module({
imports: [
ApiKeysModule.register({
apiKeys: [],
}),
],
})
export class AppModule {}
`

In the apiKeys array you need to provide all available _API Keys_.

`ts
ApiKeysModule.register({
apiKeys: [
{
name: 'For reading users', // Descriptive name
keys: ['supersecretapikey'], // API keys composing this key
permissions: ['users.read'], // Permissions given to this key
},
],
}),
`

- name: allows you to provide a name to the API key for identification purposes (there is no functionality attached to the name).
- keys: an array where you provide all keys that compose the API key. Having more than one Key allows you to switch keys without downtime.
- permissions: an array where you place permissions as strings. Endpoints and controllers can require permissions, so you can assign them to api keys in here.

REMEMBER: it is recommended that you DON'T provide directly here these values in production. You should get keys from a _.ENV_ file or any other secure source.

In production you should (for example):

`ts
ApiKeysModule.register({
apiKeys: JSON.parse(process.env.API_KEYS_JSON_STRING),
}),
`

$3

- apiKeyHeader: allows you to change the header name where API key is read. By default it is 'api-key'.

2. Protecting endpoints

You can secure any endpoint by using the ApiKeyGuard guard:

`ts
@UseGuards(
ApiKeyGuard({
permissions: ['users.read'],
}),
)
@Get('users')
async getUsers() {
// Fetch users
}
``