@sap/xssec/src/jwks/Jwks.js

XS Advanced Container Security API for node.js

const Jwk = require("./Jwk");
const MissingKidError = require('../error/validation/MissingKidError');

class Jwks {
    constructor(keys = []) {
        this.keys = Object.create(null);
        for(const k of keys) {
            this.keys[k.kid] = new Jwk(k);
        }
    }

    /**
     * Retrieves the JWK (JSON Web Key) associated with the specified key ID (kid).
     * @param {string} kid - The key ID (kid) of the JWK to retrieve.
     * @returns {Jwk} - The JWK associated with the specified key ID.
     * @throws {MissingKidError} - If the JWKS does not contain a key for the specified key ID.
     */
    get(kid) {
        const jwk = this.keys[kid];
        if(!jwk) throw new MissingKidError(kid, `JWKS does not contain a key for kid=${kid}`);

        return jwk;
    }
}

module.exports = Jwks;