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https://github.com/commenthol/veloze-jwt

JWT Token Validation
https://github.com/commenthol/veloze-jwt

jwt jwt-token validation veloze

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JWT Token Validation

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# @veloze/jwt

Middleware to verify JSON-Web-Tokens (JWT) sent in Bearer Authorization Header.

If public-keys are required to verify JWTs the JWKS URI can be detected by
issuer using `.well-known/openid-configuration` URLs.

Supports multiple issuers with the `jwks()` method.

Works also with [express][] using `jwtAuthExpress()`.

# usage

Installation

```
npm i @veloze/jwt
```

In your code:

```js
import { Server } from 'veloze'
import { jwtAuth } from '@veloze/jwt'

const server = new Server()
const issuer = 'https://my.oau.th'
// for HS256, HS384, HS512 token provide secret
const protect = jwtAuth({ issuer, secret: 's€cr3t' })
server.get('/', protect, (req, res) => res.end())
server.listen(443)

// ----
await fetch('https://server', {
headers: {
authorization: 'Bearer ' // H256 Token with issuer https://my.oau.th
}
})
```

For OIDC servers with .well-known/openid-configuration

```js
import { jwtAuth, jwks } from '@veloze/jwt'

const issuer = 'https://my.oau.th'
const issuer2 = 'https://oauth.other'

// supports multiple issuers
const secret = jwks([issuer, issuer2])
const protect = jwtAuth({ secret })
```

# API

## jwtAuth

```ts
import {
JWTHeaderParameters,
JWTPayload,
JWTVerifyOptions,
KeyLike
} from 'jose'

interface DecodedJWT {
header: JWTHeaderParameters,
payload: JWTPayload,
signature: string
}

type GetKeyLikeFn = (decodedToken: DecodedJWT, req: Request) => Promise;

interface JwtOptions extends JWTVerifyOptions {
/**
* for HS256...HS512 provide secret as Buffer or string
* for asymmetric JWT provide publicKey as secret
*/
secret: string|Buffer|KeyLike|GetKeyLikeFn
/**
* if verification is successful then payload of decoded token is added to
* request using this property e.g. default is `req.auth`
* @default 'auth'
*/
requestProperty: string
}

function jwtAuth (options: JwtOptions):
Promise<(req: Request, res: Response): void>

function jwtAuthExpress (options: JwtOptions):
(req: Request, res: Response, next: Function): void
```

## jwks

```ts
type JwksOptions = {
/**
* allows to set custom fetch function
*/
fetcher?: typeof fetch | undefined;
/**
* expiry in ms, JWKS uris are cached until this expiry timeout
*/
expiresIn?: number | undefined;
/**
* jwksUri by issuer (for PS, RS, ES alg JWTs)
* allows to overwrite the default jwks_uri which usually is looked-up from
* .well-known/openid-configuration
*/
jwksByIssuer?: Record | undefined;
/**
* secret by issuer (for HS JWTs)
*/
secretsByIssuer?: Record | undefined;
};

/**
* issuers: provide a list of different issuers which shall be supported
*/
function jwks(issuers: string[], options: JwksOptions): GetKeyLikeFn;
```

# license

MIT licensed

[npm-badge]: https://badgen.net/npm/v/@veloze/jwt
[npm]: https://www.npmjs.com/package/@veloze/jwt
[types-badge]:https://badgen.net/npm/types/@veloze/jwt
[actions-badge]: https://github.com/commenthol/veloze-jwt/workflows/CI/badge.svg?branch=main&event=push
[actions]: https://github.com/commenthol/veloze-jwt/actions/workflows/ci.yml?query=branch%3Amain

[express]: https://expressjs.com