@krizaka/auth

The account of a Krizaka product, behind a port: a display name, language, theme and avatar seed; the e-mail change by a link mailed to the new address (the verified flag is set by that very act); the password (checked before anything sensitive, other sessions signed out on change; reset by a link mailed to the account's address — the same answer whether or not the address has an account, the link used once within 30 minutes by default — passwordResetTtlMinutes, 5 to 1440, read by the product from its settings and said in the mail — every session signed out); the live sessions with sign-out of the others; the data export; the deletion. Each product keeps its own accounts — the package brings an adapter over the product's PostgreSQL and the migration it needs, nothing central.

import { emitMigration } from "@krizaka/db";
import { accountsSchema, dbAccounts } from "@krizaka/auth";

emitMigration(accountsSchema({ backfillVerified: true }), 1, { tables: { accounts: "accounts" } }); // commit the SQL once, in your migrations (idempotent)
const accounts = dbAccounts({ query, transaction, mail, baseUrl: "https://www.akinaza.com", product: "Akinaza", tokenPrefix: "ae", passwords: { hash, verify }, tokenHash, passwordResetTtlMinutes: 30 /* optional, 5–1440 */ }); // `transaction`: the work on one connection (BEGIN … COMMIT); the password reset needs it under concurrent requests
await accounts.updateProfile(id, { name: "Éric", theme: "dark" });
await accounts.sessions(id, new Date(), currentSessionId);
await accounts.requestPasswordReset(email, new Date()); // mails `<baseUrl>/<locale>/reset-password?token=…`
await accounts.resetPassword(token, newPassword, new Date()); // "CHANGED" | "INVALID"

Schema. The tables are a @krizaka/db module (auth), version 1 byte-identical to the SQL this package shipped before, so a product that has them adopts with no DDL change: adoptMigration(accountsSchema(), 1, context) writes the marker only, emitMigration(…) writes the SQL for a database that lacks them. The old migration function stays, @deprecated, for one minor. The roles are the module auth_roles (rolesSchema(roles, { scoped }), tables owner and scope) and the federated links auth_identity_links (identityLinksSchema). A link mail carries mail.link (kind, url, minutes or hours) beside subject and text: a product that sends branded HTML (@krizaka/email: passwordReset, emailChange) renders it from the data.

The product keeps what is its own: its session cookie and token hashing (tokenHash), its password hashing, its mailer, its rate limits and its HTTP answers (AccountError carries a status and a stable code). Time is passed in (now); nothing here reads the clock.

Roles per scope

A role model is data: defineRoles({ roles, permissions, manages }) says which roles exist, what each may do and who may hand which role to whom. createRoles keeps memberships (one person, several scopes, a role in each) and invitations (an e-mail invited with a role, a link used once, only its hash kept, never demoting), refuses to remove or demote the last owner, and answers authorize(account, scope, "invoices") with the role or a stable refusal (NOT_A_MEMBER 404, FORBIDDEN 403). rolesMigration(roles, { scopeTable }) makes the tables.

Federated sign-in (Google, Apple, Facebook, native PKCE)

Each product keeps its own accounts; krizaka-users is the federation provider behind a port, so a product holds no OAuth app of its own. IdentityProvider has two calls: start(provider, returnTo, { codeChallenge? }) gives the address to send the person to, complete(code, { codeVerifier? }) exchanges the one-time code (single use) for a verified ExternalIdentity (issuer, subject, email, emailVerified). A return address stays on the product (a path); an unknown provider is refused.

import { createFederatedSignIn, dbIdentityLinks, identityLinksSchema, usersIdentityProvider } from "@krizaka/auth";

emitMigration(identityLinksSchema, 1, { tables: { accounts: "accounts" } }); // once, in your migrations (idempotent): (issuer, subject) → account
const federation = usersIdentityProvider({ baseUrl: "https://auth.dev.akinaza.com", appUrl: "https://dev.akinaza.com", fetch });
const signIn = createFederatedSignIn({ links: dbIdentityLinks(query), accounts: { findByEmail, create }, clock });

const { url } = await federation.start("google", "/fr/account"); // redirect there
const result = await signIn.signIn(await federation.complete(code)); // { status: "signed-in", accountId, via } | { status: "refused", code }

An external identity attaches to an existing account only when the address is verified on both sides (by the provider and by the product); otherwise it is refused (EMAIL_NOT_VERIFIED, ACCOUNT_EMAIL_UNVERIFIED), and it is never a second user table. create is optional: leave it out and a person without an account is refused (NO_ACCOUNT). Adapters run the conformance kits of @krizaka/auth/testkit (identityProviderContract, identityLinkStoreContract).

postgresAccounts was the first name of dbAccounts; it stays as a @deprecated alias for one minor and leaves in the next major.

A signed-in visitor never sees the public side

In the product's proxy.ts (Web Request/Response, no framework): landingRedirect(request, { cookie, landing: ["/", "/fr", "/en"], home, origin }) (origin: the app's declared public origin, never read from the request; absolute Location on it, relative without) answers 307 to the home with Cache-Control: private, no-store and Vary: Cookie when the session cookie exists on a landing route, else null. sessionHint(response, request, { cookie, secure }) keeps the readable kz-session=1 flag in step with the cookie (never the token), so the static pages stay the same for everyone and NavBarSession of @krizaka/ui draws the signed-in placeholder on its first paint. Both read the cookie as a hint only: the page and the API still resolve the session.

Sessions, passwords, addresses and the administration's locks

What Yomizaka and Akinaza each copied (password.ts, client-ip.ts, session.ts, the admin gate of access.ts) is here once. Each piece is a function of its inputs: the product reads its environment and its framework, and passes values.

import { allowedIps, clientIp, createSessions, dbSessionStore, hashPassword, requireAdmin, sessionCookie, sessionTokenOf, verifyPassword } from "@krizaka/auth";

const sessions = createSessions({
  store: dbSessionStore(query, { columns: ["id", "email", "role", "locale"], toAccount: (row) => ({ id: String(row.id), email: String(row.email), role: row.role as "USER" | "ADMIN", locale: row.locale as "en" | "fr" }), active: { column: "status", equals: "ACTIVE" } }),
  clock: { now: () => new Date() },
  tokenPrefix: "ys",                       // tokens are `ys1.<43 characters>`
  secret: () => env.AUTH_SESSION_SECRET,   // keys the stored hash (HMAC-SHA256)
  sessionDays: () => settings.get("auth.sessionDays"), // the setting, read for each new session
});

const ip = clientIp(request.headers, { header: env.ABUSE_CLIENT_IP_HEADER, trustedProxyHops: env.ABUSE_TRUSTED_PROXY_HOPS });
const { token, expires } = await sessions.create(account.id, { ip, userAgent: request.headers.get("user-agent") });
cookies().set(sessionCookie(token, expires, { name: "yomizaka_session", secure: production }));

const session = await sessions.resolve(sessionTokenOf(request.headers, { cookie: "yomizaka_session" })); // bearer of a native app, else the cookie
const verdict = requireAdmin({ session, ip, allowedIps: allowedIps(env.AUTH_ALLOWED_IPS, { production }), surface: "api" }); // { ok: true } | { ok: false, status, code }

• Passwords: hashPassword and verifyPassword are scrypt (N=2^15, r=8, p=1), stored scrypt$N$r$p$salt$hash, the format of the copies: a hash a product stored verifies here (a test pins one). passwordProblem (12 to 256 characters) and decoyHash (verify against it when the address has no account: the same work, the same time). Hand them to dbAccounts({ passwords: { hash: hashPassword, verify: verifyPassword } }).
• Client address: clientIp(headers, { header, trustedProxyHops }) reads the header the edge sets, else the entry trustedProxyHops from the right of X-Forwarded-For (never the left: the client writes it), else X-Real-IP, else null.
• Sessions: a SessionStore port with dbSessionStore (the product's sessions table, declared as parameters: the table names and the account columns are checked, and a suspended account signs nobody in at once), memorySessionStore for tests, and sessionsSchema for a product without the table. The token is shown once; only its HMAC is stored, with the same formula as the copies, so sessions already stored keep working. A session lasts sessionDays of 24 hours from the clock.
• The administration's locks: requireAdmin({ session, ip, allowedIps, surface }) decides on the three locks (a session, the ADMIN role, an address on the list) and answers the status and code: on the API 401 or 403 with UNAUTHENTICATED, FORBIDDEN or IP_NOT_ALLOWED; on a page 404 for every failed lock, because the administration does not announce itself. allowedIps(list, { production }) makes an empty list « nobody » in production and « anybody » in development.
• @krizaka/auth/contract (browser-safe, needs zod): GET /api/me answers 200 { signedIn, signupOpen, account? } with Cache-Control: private, no-store and Vary: Cookie (krizaka-ui#551). Signed out is not an error. meResponse({ signupOpen, account }) builds the answer and checks it against meSchema; the bar island of @krizaka/ui reads the same file.
• @krizaka/auth/settings (needs @krizaka/settings): the registry fragment authSettings: auth.sessionDays (14, 1 to 90) and auth.passwordResetMinutes (30, 5 to 1440).
• Forgotten password: dbAccounts already is the reset port: requestPasswordReset(email, now) (the same answer whether or not the address has an account, the link mailed in the person's language) and resetPassword(token, next, now) (the token is stored hashed, used once, expires after auth.passwordResetMinutes, and every session ends). Put the product's limiter in front of both routes (@krizaka/rate-limit).

sessionStoreContract (from @krizaka/auth/testkit) is the contract every SessionStore adapter runs, memory and database alike.