@guardian/pan-domain-node/dist/src/panda.js

NodeJs implementation of Guardian pan-domain auth verification

"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.PanDomainAuthentication = exports.verifyUser = exports.createCookie = void 0;
const cookie = __importStar(require("cookie"));
const utils_1 = require("./utils");
const api_1 = require("./api");
const fetch_public_key_1 = require("./fetch-public-key");
function createCookie(user, privateKey) {
    let queryParams = [];
    queryParams.push("firstName=" + user.firstName);
    queryParams.push("lastName=" + user.lastName);
    queryParams.push("email=" + user.email);
    user.avatarUrl && queryParams.push("avatarUrl=" + user.avatarUrl);
    queryParams.push("system=" + user.authenticatingSystem);
    queryParams.push("authedIn=" + user.authenticatedIn.join(","));
    queryParams.push("expires=" + user.expires.toString());
    queryParams.push("multifactor=" + String(user.multifactor));
    const combined = queryParams.join("&");
    const queryParamsString = Buffer.from(combined).toString('base64');
    const signature = utils_1.sign(combined, privateKey);
    return queryParamsString + "." + signature;
}
exports.createCookie = createCookie;
function verifyUser(pandaCookie, publicKey, currentTime, validateUser) {
    if (!pandaCookie) {
        return { status: api_1.AuthenticationStatus.INVALID_COOKIE };
    }
    const { data, signature } = utils_1.parseCookie(pandaCookie);
    if (!utils_1.verifySignature(data, signature, publicKey)) {
        return { status: api_1.AuthenticationStatus.INVALID_COOKIE };
    }
    const currentTimestampInMilliseconds = currentTime.getTime();
    try {
        const user = utils_1.parseUser(data);
        const isExpired = user.expires < currentTimestampInMilliseconds;
        if (isExpired) {
            return { status: api_1.AuthenticationStatus.EXPIRED, user };
        }
        if (!validateUser(user)) {
            return { status: api_1.AuthenticationStatus.NOT_AUTHORISED, user };
        }
        return { status: api_1.AuthenticationStatus.AUTHORISED, user };
    }
    catch (error) {
        console.error(error);
        return { status: api_1.AuthenticationStatus.INVALID_COOKIE };
    }
}
exports.verifyUser = verifyUser;
class PanDomainAuthentication {
    constructor(cookieName, region, bucket, keyFile, validateUser) {
        this.keyCacheTime = 60 * 1000; // 1 minute
        this.cookieName = cookieName;
        this.region = region;
        this.bucket = bucket;
        this.keyFile = keyFile;
        this.validateUser = validateUser;
        this.publicKey = fetch_public_key_1.fetchPublicKey(region, bucket, keyFile);
        this.keyUpdateTimer = setInterval(() => this.getPublicKey(), this.keyCacheTime);
    }
    stop() {
        if (this.keyUpdateTimer) {
            clearInterval(this.keyUpdateTimer);
            this.keyUpdateTimer = undefined;
        }
    }
    getPublicKey() {
        return this.publicKey.then(({ key, lastUpdated }) => {
            const now = new Date();
            const diff = now.getTime() - lastUpdated.getTime();
            if (diff > this.keyCacheTime) {
                this.publicKey = fetch_public_key_1.fetchPublicKey(this.region, this.bucket, this.keyFile);
                return this.publicKey.then(({ key }) => key);
            }
            else {
                return key;
            }
        });
    }
    verify(requestCookies) {
        return this.getPublicKey().then(publicKey => {
            const cookies = cookie.parse(requestCookies);
            const pandaCookie = cookies[this.cookieName];
            return verifyUser(pandaCookie, publicKey, new Date(), this.validateUser);
        });
    }
}
exports.PanDomainAuthentication = PanDomainAuthentication;