@fanoutio/grip/build/auth/Jwt.js

GRIP Interface Library

import * as jose from 'jose';
import { isSymmetricSecret, JwkKey, PemKey } from '../utilities/index.js';
// JWT authentication class used for building auth headers containing
// JSON web token information in the form of a claim and corresponding key.
export class Jwt {
    _claim;
    _key;
    _alg;
    constructor(claim, key, alg) {
        // Initialize with the specified claim and key.
        this._claim = claim;
        this._key = key;
        this._alg = alg;
    }
    // Returns the auth header containing the JWT token in Bearer format.
    async buildHeader() {
        const key = this._key;
        let alg = this._alg ?? (isSymmetricSecret(key) ? 'HS256' : 'RS256');
        let signKey;
        if (key instanceof JwkKey) {
            signKey = await key.getSecretOrKeyLike(alg);
        }
        else if (key instanceof PemKey) {
            signKey = await key.getKeyLike(alg);
        }
        else {
            signKey = key;
        }
        const signJwt = new jose.SignJWT(this._claim)
            .setProtectedHeader({ alg })
            .setExpirationTime('10m');
        const token = await signJwt.sign(signKey);
        return `Bearer ${token}`;
    }
    getClaim() {
        return this._claim;
    }
    getKey() {
        return this._key;
    }
}