Add optional 30-day remembered sessions

src/lib/server/auth/index.ts

@@ -6,6 +6,7 @@ import { systemUsername, type AuthUser, type UserRole } from '../../auth.js';
 export const SESSION_COOKIE = '__Host-ec_session';
 export const SESSION_LIFETIME_MS = 12 * 60 * 60_000;
 export const SESSION_IDLE_MS = 30 * 60_000;
+export const REMEMBERED_SESSION_LIFETIME_MS = 30 * 24 * 60 * 60_000;
 const digest = (value: string) => createHash('sha256').update(value).digest('hex');
 function database() {
     return db();
@@ -231,6 +232,8 @@ export async function authenticatePassword(
     input: Record<string, unknown>,
     clientAddress: string
 ): Promise<AuthResult> {
+    if (input.rememberMe !== undefined && typeof input.rememberMe !== 'boolean')
+        throw new AuthError('Keep me signed in must be true or false.');
     const name =
         typeof input.username === 'string' ? input.username.slice(0, 64).toLowerCase() : '';
     consumeAuthAttempt(clientAddress, name);
@@ -253,54 +256,67 @@ export async function authenticatePassword(
                 .prepare('UPDATE auth_users SET last_login_at=? WHERE id=?')
                 .run(Date.now(), current.id);
             recordAudit(current.id, 'login', current.id);
-            return { user: getUser(current.id)!, session: createSession(current.id) };
+            return {
+                user: getUser(current.id)!,
+                session: createSession(current.id, input.rememberMe === true)
+            };
         })
         .immediate();
     if (!result) throw new AuthError('Invalid username or password.', 401);
     return result;
 }
 
-export function createSession(userId: string): { token: string; expiresAt: number } {
+export function createSession(
+    userId: string,
+    remembered = false
+): { token: string; expiresAt: number } {
     const now = Date.now();
     const user = userRow(userId);
     if (!user || user.disabled) throw new AuthError('Account is unavailable.', 401);
     const token = randomBytes(32).toString('base64url');
-    const expiresAt = now + SESSION_LIFETIME_MS;
+    const expiresAt = now + (remembered ? REMEMBERED_SESSION_LIFETIME_MS : SESSION_LIFETIME_MS);
     database()
-        .prepare('DELETE FROM auth_sessions WHERE expires_at <= ? OR last_seen_at <= ?')
+        .prepare(
+            'DELETE FROM auth_sessions WHERE expires_at <= ? OR (remembered=0 AND last_seen_at <= ?)'
+        )
         .run(now, now - SESSION_IDLE_MS);
     database()
         .prepare(
-            'INSERT INTO auth_sessions(token_hash,user_id,created_at,expires_at,last_seen_at) VALUES(?,?,?,?,?)'
+            'INSERT INTO auth_sessions(token_hash,user_id,created_at,expires_at,last_seen_at,remembered) VALUES(?,?,?,?,?,?)'
         )
-        .run(digest(token), userId, now, expiresAt, now);
+        .run(digest(token), userId, now, expiresAt, now, Number(remembered));
     return { token, expiresAt };
 }
 export function readSession(
     token: string | undefined,
     touch = true
-): { user: AuthUser; tokenHash: string; expiresAt: number } | null {
+): { user: AuthUser; tokenHash: string; expiresAt: number; remembered: boolean } | null {
     if (!token || !/^[A-Za-z0-9_-]{43}$/.test(token)) return null;
     return readSessionHash(digest(token), touch);
 }
 export function readSessionHash(
     tokenHash: string,
     touch = false
-): { user: AuthUser; tokenHash: string; expiresAt: number } | null {
+): { user: AuthUser; tokenHash: string; expiresAt: number; remembered: boolean } | null {
     const now = Date.now();
     const row = database()
         .prepare(
-            `SELECT u.*,s.expires_at,s.last_seen_at FROM auth_sessions s JOIN auth_users u ON u.id=s.user_id
-        WHERE s.token_hash=? AND s.expires_at>? AND s.last_seen_at>? AND u.disabled=0`
+            `SELECT u.*,s.expires_at,s.last_seen_at,s.remembered FROM auth_sessions s JOIN auth_users u ON u.id=s.user_id
+        WHERE s.token_hash=? AND s.expires_at>? AND (s.remembered=1 OR s.last_seen_at>?) AND u.disabled=0`
         )
         .get(tokenHash, now, now - SESSION_IDLE_MS) as
-        (UserRow & { expires_at: number; last_seen_at: number }) | undefined;
+        (UserRow & { expires_at: number; last_seen_at: number; remembered: number }) | undefined;
     if (!row) return null;
     if (touch && row.last_seen_at < now - 60_000)
         database()
             .prepare('UPDATE auth_sessions SET last_seen_at=? WHERE token_hash=?')
             .run(now, tokenHash);
-    return { user: present(row), tokenHash, expiresAt: row.expires_at };
+    return {
+        user: present(row),
+        tokenHash,
+        expiresAt: row.expires_at,
+        remembered: !!row.remembered
+    };
 }
 export function revokeSession(token: string | undefined): void {
     if (token)
@@ -319,11 +335,30 @@ function requireAdministrator(actorId: string) {
     if (!actor || actor.disabled || actor.role !== 'admin' || actor.must_change_password)
         throw new AuthError('Administrator access is required.', 403);
 }
+type AccountSession = { tokenHash: string; clientAddress: string };
+function requireSessionUser(userId: string, tokenHash: string) {
+    const session = readSessionHash(tokenHash);
+    if (!session || session.user.id !== userId) throw new AuthError('Sign in to continue.', 401);
+    return session;
+}
+async function confirmAccountPassword(
+    actorId: string,
+    currentPassword: unknown,
+    session: AccountSession
+): Promise<void> {
+    if (!requireSessionUser(actorId, session.tokenHash).remembered) return;
+    consumeAuthAttempt(session.clientAddress, actorId, 'password');
+    if (!(await verifyPassword(currentPassword, userRow(actorId)?.password_hash ?? null)))
+        throw new AuthError('Enter your current password to confirm account changes.', 403);
+    requireSessionUser(actorId, session.tokenHash);
+}
 export async function createUser(
     actorId: string,
-    input: Record<string, unknown>
+    input: Record<string, unknown>,
+    session?: AccountSession
 ): Promise<AuthUser> {
     requireAdministrator(actorId);
+    if (session) await confirmAccountPassword(actorId, input.currentPassword, session);
     const name = username(input.username),
         label = displayName(input.displayName, name),
         userRole = role(input.role);
@@ -331,6 +366,7 @@ export async function createUser(
     return database()
         .transaction(() => {
             requireAdministrator(actorId);
+            if (session) requireSessionUser(actorId, session.tokenHash);
             const user = insertUser({
                 username: name,
                 displayName: label,
@@ -346,9 +382,11 @@ export async function createUser(
 export async function updateUser(
     actorId: string,
     id: string,
-    input: Record<string, unknown>
+    input: Record<string, unknown>,
+    session?: AccountSession
 ): Promise<AuthUser> {
     requireAdministrator(actorId);
+    if (session) await confirmAccountPassword(actorId, input.currentPassword, session);
     if (input.disabled !== undefined && typeof input.disabled !== 'boolean')
         throw new AuthError('Disabled must be true or false.');
     if (input.password !== undefined && actorId === id)
@@ -357,6 +395,7 @@ export async function updateUser(
     return database()
         .transaction(() => {
             requireAdministrator(actorId);
+            if (session) requireSessionUser(actorId, session.tokenHash);
             const current = userRow(id);
             if (!current) throw new AuthError('User not found.', 404);
             const nextRole = input.role === undefined ? current.role : role(input.role);
@@ -402,7 +441,8 @@ export async function updateUser(
 export async function changePassword(
     userId: string,
     currentPassword: unknown,
-    newPassword: unknown
+    newPassword: unknown,
+    sessionHash?: string
 ): Promise<AuthResult> {
     const original = userRow(userId);
     if (
@@ -415,6 +455,8 @@ export async function changePassword(
     const passwordHash = await hashPassword(newPassword);
     return database()
         .transaction(() => {
+            const session =
+                sessionHash === undefined ? null : requireSessionUser(userId, sessionHash);
             const current = userRow(userId);
             if (!current || current.disabled || current.password_hash !== original.password_hash)
                 throw new AuthError(
@@ -428,7 +470,10 @@ export async function changePassword(
                 .run(passwordHash, Date.now(), userId);
             database().prepare('DELETE FROM auth_sessions WHERE user_id=?').run(userId);
             recordAudit(userId, 'password.changed', userId);
-            return { user: getUser(userId)!, session: createSession(userId) };
+            return {
+                user: getUser(userId)!,
+                session: createSession(userId, session?.remembered ?? false)
+            };
         })
         .immediate();
 }

src/lib/server/auth/schema.ts

@@ -24,6 +24,15 @@ export function migrateAuthSchema(handle: Database.Database): void {
     `);
 }
 
+export function migrateRememberedSessions(handle: Database.Database): void {
+    const columns = handle.pragma('table_info(auth_sessions)') as { name: string }[];
+    if (columns.some((column) => column.name === 'remembered')) return;
+    handle.exec(`
+        ALTER TABLE auth_sessions ADD COLUMN remembered INTEGER NOT NULL DEFAULT 0
+            CHECK(remembered IN (0,1));
+    `);
+}
+
 /** Run with foreign keys disabled by the migration runner before its transaction. */
 export function migrateSuperViewerRole(handle: Database.Database): void {
     const schema = handle