@auth0/nextjs-auth0/dist/server/session/stateful-session-store.js

Auth0 Next.js SDK

import * as cookies from "../cookies";
import { AbstractSessionStore } from "./abstract-session-store";
import { LEGACY_COOKIE_NAME, normalizeStatefulSession } from "./normalize-session";
const generateId = () => {
    const bytes = new Uint8Array(16);
    crypto.getRandomValues(bytes);
    return Array.from(bytes)
        .map((b) => b.toString(16).padStart(2, "0"))
        .join("");
};
export class StatefulSessionStore extends AbstractSessionStore {
    constructor({ secret, store, rolling, absoluteDuration, inactivityDuration, cookieOptions }) {
        super({
            secret,
            rolling,
            absoluteDuration,
            inactivityDuration,
            cookieOptions
        });
        this.store = store;
    }
    async get(reqCookies) {
        const cookie = reqCookies.get(this.sessionCookieName) ||
            reqCookies.get(LEGACY_COOKIE_NAME);
        if (!cookie || !cookie.value) {
            return null;
        }
        // we attempt to extract the session ID by decrypting the cookie value (assuming it's a JWE, v4+) first
        // if that fails, we attempt to verify the cookie value as a signed cookie (legacy, v3-)
        // if both fail, we return null
        // this ensures that v3 sessions are respected and can be transparently rolled over to v4+ sessions
        let sessionId = null;
        try {
            const { payload: sessionCookie } = await cookies.decrypt(cookie.value, this.secret);
            sessionId = sessionCookie.id;
        }
        catch (e) {
            // the session cookie could not be decrypted, try to verify if it's a legacy session
            if (e.code === "ERR_JWE_INVALID") {
                const legacySessionId = await cookies.verifySigned(cookie.name, cookie.value, this.secret);
                if (!legacySessionId) {
                    return null;
                }
                sessionId = legacySessionId;
            }
        }
        if (!sessionId) {
            return null;
        }
        const session = await this.store.get(sessionId);
        if (!session) {
            return null;
        }
        return normalizeStatefulSession(session);
    }
    async set(reqCookies, resCookies, session, isNew = false) {
        // check if a session already exists. If so, maintain the existing session ID
        let sessionId = null;
        const cookieValue = reqCookies.get(this.sessionCookieName)?.value;
        if (cookieValue) {
            const { payload: sessionCookie } = await cookies.decrypt(cookieValue, this.secret);
            sessionId = sessionCookie.id;
        }
        // if this is a new session created by a new login we need to remove the old session
        // from the store and regenerate the session ID to prevent session fixation.
        if (sessionId && isNew) {
            await this.store.delete(sessionId);
            sessionId = generateId();
        }
        if (!sessionId) {
            sessionId = generateId();
        }
        const maxAge = this.calculateMaxAge(session.internal.createdAt);
        const expiration = Date.now() / 1000 + maxAge;
        const jwe = await cookies.encrypt({
            id: sessionId
        }, this.secret, expiration);
        resCookies.set(this.sessionCookieName, jwe.toString(), {
            ...this.cookieConfig,
            maxAge
        });
        await this.store.set(sessionId, session);
        // to enable read-after-write in the same request for middleware
        reqCookies.set(this.sessionCookieName, jwe.toString());
        // Any existing v3 cookie can also be deleted once we have set a v4 cookie.
        // In stateful sessions, we do not have to worry about chunking.
        if (this.sessionCookieName !== LEGACY_COOKIE_NAME &&
            reqCookies.has(LEGACY_COOKIE_NAME)) {
            resCookies.delete(LEGACY_COOKIE_NAME);
        }
    }
    async delete(reqCookies, resCookies) {
        const cookieValue = reqCookies.get(this.sessionCookieName)?.value;
        await resCookies.delete(this.sessionCookieName);
        if (!cookieValue) {
            return;
        }
        const { payload: session } = await cookies.decrypt(cookieValue, this.secret);
        await this.store.delete(session.id);
    }
}