feat: implement auth system, passkeys, and user management

Add PostgreSQL and Redis integration for users and sessions
Implement password and WebAuthn passkey login flows
Add Docker stack, super-admin seeding, and protected routes

server/utils/auth.ts

@@ -0,0 +1,78 @@
+import type { H3Event } from 'h3'
+
+import type { UserRole } from '~~/shared/auth'
+
+import { createUserSession, destroyUserSession, getUserSession } from './session'
+import { getUserById, updateLastLogin, type UserAuthRecord } from './user-repository'
+
+export function normalizeUsername(value: string) {
+  return value.trim().toLowerCase()
+}
+
+export async function getAuthContext(event: H3Event): Promise<{
+  session: Awaited<ReturnType<typeof getUserSession>>
+  user: UserAuthRecord
+} | null> {
+  const session = await getUserSession(event)
+
+  if (!session) {
+    return null
+  }
+
+  const user = await getUserById(session.userId)
+
+  if (!user || !user.isActive) {
+    await destroyUserSession(event)
+    return null
+  }
+
+  return {
+    session,
+    user
+  }
+}
+
+export async function requireAuth(event: H3Event) {
+  const auth = await getAuthContext(event)
+
+  if (!auth) {
+    throw createError({
+      statusCode: 401,
+      statusMessage: 'Authentication required'
+    })
+  }
+
+  return auth
+}
+
+export async function requireRole(event: H3Event, role: UserRole) {
+  const auth = await requireAuth(event)
+
+  if (auth.user.role !== role) {
+    throw createError({
+      statusCode: 403,
+      statusMessage: 'You are not allowed to perform this action'
+    })
+  }
+
+  return auth
+}
+
+export async function signInUser(event: H3Event, user: UserAuthRecord, remember: boolean) {
+  await createUserSession(event, {
+    userId: user.id,
+    remember
+  })
+  await updateLastLogin(user.id)
+
+  const refreshedUser = await getUserById(user.id)
+
+  if (!refreshedUser) {
+    throw createError({
+      statusCode: 500,
+      statusMessage: 'Unable to load authenticated user'
+    })
+  }
+
+  return refreshedUser
+}

server/utils/base64url.ts

@@ -0,0 +1,41 @@
+import { randomBytes } from 'node:crypto'
+
+export function encodeBase64Url(value: Buffer | Uint8Array | string): string {
+  const buffer = typeof value === 'string'
+    ? Buffer.from(value, 'utf8')
+    : Buffer.from(value)
+
+  return buffer
+    .toString('base64')
+    .replace(/\+/g, '-')
+    .replace(/\//g, '_')
+    .replace(/=+$/g, '')
+}
+
+export function decodeBase64Url(value: string): Buffer {
+  const normalized = value
+    .replace(/-/g, '+')
+    .replace(/_/g, '/')
+
+  const padding = normalized.length % 4 === 0
+    ? ''
+    : '='.repeat(4 - (normalized.length % 4))
+
+  return Buffer.from(`${normalized}${padding}`, 'base64')
+}
+
+export function randomToken(length = 32): string {
+  return encodeBase64Url(randomBytes(length))
+}
+
+export function toIsoString(value: Date | string | null): string | null {
+  if (!value) {
+    return null
+  }
+
+  if (value instanceof Date) {
+    return value.toISOString()
+  }
+
+  return new Date(value).toISOString()
+}

server/utils/db-init.ts

@@ -0,0 +1,106 @@
+import { randomUUID } from 'node:crypto'
+
+import { DEFAULT_USER_PASSWORD } from '~~/shared/auth'
+
+import { hashPassword } from './password'
+import { getSqlClient } from './postgres'
+
+let databaseReadyPromise: Promise<void> | null = null
+
+export async function ensureDatabaseReady() {
+  if (!databaseReadyPromise) {
+    databaseReadyPromise = initializeDatabase()
+  }
+
+  return databaseReadyPromise
+}
+
+async function initializeDatabase() {
+  const sql = getSqlClient()
+
+  await sql`
+    create table if not exists users (
+      id text primary key,
+      username text not null unique,
+      full_name text not null,
+      phone_number text,
+      role text not null check (role in ('super_admin', 'staff')),
+      password_hash text not null,
+      must_change_password boolean not null default true,
+      is_active boolean not null default true,
+      created_by text references users(id) on delete set null,
+      created_at timestamptz not null default now(),
+      updated_at timestamptz not null default now(),
+      last_login_at timestamptz
+    )
+  `
+
+  await sql`
+    alter table users
+    add column if not exists phone_number text
+  `
+
+  await sql`
+    create table if not exists user_passkeys (
+      id text primary key,
+      user_id text not null references users(id) on delete cascade,
+      credential_id text not null unique,
+      public_key text not null,
+      counter bigint not null default 0,
+      device_type text not null check (device_type in ('singleDevice', 'multiDevice')),
+      backed_up boolean not null default false,
+      transports jsonb not null default '[]'::jsonb,
+      label text not null,
+      created_at timestamptz not null default now(),
+      last_used_at timestamptz
+    )
+  `
+
+  await sql`
+    create index if not exists user_passkeys_user_id_idx
+    on user_passkeys (user_id)
+  `
+
+  const [existingSuperAdmin] = await sql<{ id: string }[]>`
+    select id
+    from users
+    where username = 'xiaomai'
+    limit 1
+  `
+
+  if (!existingSuperAdmin) {
+    const passwordHash = await hashPassword(DEFAULT_USER_PASSWORD)
+
+    await sql`
+      insert into users (
+        id,
+        username,
+        full_name,
+        role,
+        password_hash,
+        must_change_password,
+        is_active,
+        created_by
+      )
+      values (
+        ${randomUUID()},
+        'xiaomai',
+        'Xiaomai',
+        'super_admin',
+        ${passwordHash},
+        true,
+        true,
+        null
+      )
+    `
+  }
+
+  await sql`
+    update users
+    set
+      phone_number = '601157753558',
+      updated_at = now()
+    where username = 'xiaomai'
+      and (phone_number is null or phone_number = '')
+  `
+}

server/utils/password.ts

@@ -0,0 +1,52 @@
+import { randomBytes, scrypt as scryptCallback, timingSafeEqual } from 'node:crypto'
+import { promisify } from 'node:util'
+
+import { decodeBase64Url, encodeBase64Url } from './base64url'
+
+const scrypt = promisify(scryptCallback)
+const SCRYPT_COST = 16_384
+const SCRYPT_BLOCK_SIZE = 8
+const SCRYPT_PARALLELIZATION = 1
+const KEY_LENGTH = 64
+
+export async function hashPassword(password: string): Promise<string> {
+  const salt = encodeBase64Url(randomBytes(16))
+  const derivedKey = await scrypt(password, salt, KEY_LENGTH, {
+    N: SCRYPT_COST,
+    r: SCRYPT_BLOCK_SIZE,
+    p: SCRYPT_PARALLELIZATION
+  }) as Buffer
+
+  return [
+    'scrypt',
+    SCRYPT_COST,
+    SCRYPT_BLOCK_SIZE,
+    SCRYPT_PARALLELIZATION,
+    salt,
+    encodeBase64Url(derivedKey)
+  ].join('$')
+}
+
+export async function verifyPassword(password: string, storedHash: string): Promise<boolean> {
+  const [algorithm, cost, blockSize, parallelization, salt, key] = storedHash.split('$')
+
+  if (
+    algorithm !== 'scrypt'
+    || !cost
+    || !blockSize
+    || !parallelization
+    || !salt
+    || !key
+  ) {
+    return false
+  }
+
+  const expectedKey = decodeBase64Url(key)
+  const derivedKey = await scrypt(password, salt, expectedKey.length, {
+    N: Number(cost),
+    r: Number(blockSize),
+    p: Number(parallelization)
+  }) as Buffer
+
+  return timingSafeEqual(expectedKey, derivedKey)
+}

server/utils/postgres.ts

@@ -0,0 +1,18 @@
+import postgres from 'postgres'
+
+let sqlClient: postgres.Sql | null = null
+
+export function getSqlClient() {
+  if (!sqlClient) {
+    const config = useRuntimeConfig()
+
+    sqlClient = postgres(
+      config.databaseUrl || 'postgresql://postgres:postgres@127.0.0.1:5432/dinner_ticket_system',
+      {
+        max: 10
+      }
+    )
+  }
+
+  return sqlClient
+}

server/utils/redis.ts

@@ -0,0 +1,20 @@
+import { createClient, type RedisClientType } from 'redis'
+
+let redisClientPromise: Promise<RedisClientType> | null = null
+
+export async function getRedisClient() {
+  if (!redisClientPromise) {
+    const config = useRuntimeConfig()
+    const client = createClient({
+      url: config.redisUrl || 'redis://127.0.0.1:6379'
+    })
+
+    client.on('error', (error) => {
+      console.error('Redis connection error', error)
+    })
+
+    redisClientPromise = client.connect().then(() => client)
+  }
+
+  return redisClientPromise
+}

server/utils/retry.ts

@@ -0,0 +1,39 @@
+export interface RetryOptions {
+  retries?: number
+  delayMs?: number
+  factor?: number
+  label?: string
+}
+
+function sleep(delayMs: number) {
+  return new Promise((resolve) => setTimeout(resolve, delayMs))
+}
+
+export async function withRetry<T>(
+  operation: () => Promise<T>,
+  options: RetryOptions = {}
+) {
+  const retries = options.retries ?? 10
+  const delayMs = options.delayMs ?? 1_000
+  const factor = options.factor ?? 1.5
+  const label = options.label ?? 'operation'
+
+  let attempt = 0
+  let currentDelay = delayMs
+
+  while (true) {
+    try {
+      return await operation()
+    } catch (error) {
+      attempt += 1
+
+      if (attempt > retries) {
+        throw error
+      }
+
+      console.warn(`${label} failed on attempt ${attempt}. Retrying in ${currentDelay}ms.`)
+      await sleep(currentDelay)
+      currentDelay = Math.round(currentDelay * factor)
+    }
+  }
+}

server/utils/session.ts

@@ -0,0 +1,103 @@
+import { randomUUID } from 'node:crypto'
+
+import type { H3Event } from 'h3'
+
+import { deleteCookie, getCookie, getRequestURL, setCookie } from 'h3'
+
+import { randomToken } from './base64url'
+import { getRedisClient } from './redis'
+
+const DEFAULT_SESSION_TTL_SECONDS = 60 * 60 * 24 * 7
+const SHORT_SESSION_TTL_SECONDS = 60 * 60 * 24
+
+interface StoredSession {
+  id: string
+  userId: string
+  remember: boolean
+  createdAt: string
+}
+
+function getSessionCookieName() {
+  const config = useRuntimeConfig()
+  return config.sessionCookieName || 'dinner_ticket_session'
+}
+
+function getSessionStorageKey(token: string) {
+  return `auth:session:${token}`
+}
+
+function shouldUseSecureCookies(event: H3Event) {
+  const url = getRequestURL(event)
+  return url.protocol === 'https:'
+}
+
+function getSessionTtl(remember: boolean) {
+  return remember ? DEFAULT_SESSION_TTL_SECONDS : SHORT_SESSION_TTL_SECONDS
+}
+
+export async function createUserSession(event: H3Event, input: {
+  userId: string
+  remember: boolean
+}) {
+  const token = randomToken(32)
+  const session: StoredSession = {
+    id: randomUUID(),
+    userId: input.userId,
+    remember: input.remember,
+    createdAt: new Date().toISOString()
+  }
+  const redis = await getRedisClient()
+  const ttl = getSessionTtl(input.remember)
+
+  await redis.set(getSessionStorageKey(token), JSON.stringify(session), {
+    expiration: {
+      type: 'EX',
+      value: ttl
+    }
+  })
+
+  setCookie(event, getSessionCookieName(), token, {
+    httpOnly: true,
+    sameSite: 'lax',
+    secure: shouldUseSecureCookies(event),
+    path: '/',
+    maxAge: ttl
+  })
+
+  return session
+}
+
+export async function getUserSession(event: H3Event): Promise<StoredSession | null> {
+  const token = getCookie(event, getSessionCookieName())
+
+  if (!token) {
+    return null
+  }
+
+  const redis = await getRedisClient()
+  const raw = await redis.get(getSessionStorageKey(token))
+
+  if (!raw) {
+    deleteCookie(event, getSessionCookieName(), { path: '/' })
+    return null
+  }
+
+  try {
+    return JSON.parse(raw) as StoredSession
+  } catch {
+    await redis.del(getSessionStorageKey(token))
+    deleteCookie(event, getSessionCookieName(), { path: '/' })
+    return null
+  }
+}
+
+export async function destroyUserSession(event: H3Event) {
+  const token = getCookie(event, getSessionCookieName())
+
+  if (token) {
+    const redis = await getRedisClient()
+    await redis.del(getSessionStorageKey(token))
+  }
+
+  deleteCookie(event, getSessionCookieName(), { path: '/' })
+}

server/utils/user-repository.ts

@@ -0,0 +1,492 @@
+import { randomUUID } from 'node:crypto'
+
+import type { AuthenticatorTransportFuture, CredentialDeviceType } from '@simplewebauthn/server'
+
+import type { AuthUser, ManagedUser, PasskeySummary, PublicContact, UserRole } from '~~/shared/auth'
+
+import { encodeBase64Url, toIsoString } from './base64url'
+import { ensureDatabaseReady } from './db-init'
+import { getSqlClient } from './postgres'
+
+type DbUserRow = {
+  id: string
+  username: string
+  full_name: string
+  phone_number: string | null
+  role: UserRole
+  password_hash: string
+  must_change_password: boolean
+  is_active: boolean
+  created_by: string | null
+  created_at: Date | string
+  last_login_at: Date | string | null
+  passkey_count: number | string
+}
+
+type DbPasskeyRow = {
+  id: string
+  user_id: string
+  credential_id: string
+  public_key: string
+  counter: number | string
+  device_type: CredentialDeviceType
+  backed_up: boolean
+  transports: AuthenticatorTransportFuture[] | string
+  label: string
+  created_at: Date | string
+  last_used_at: Date | string | null
+}
+
+export interface UserAuthRecord extends AuthUser {
+  passwordHash: string
+  createdBy: string | null
+}
+
+export interface PasskeyRecord {
+  id: string
+  userId: string
+  credentialId: string
+  publicKey: string
+  counter: number
+  deviceType: CredentialDeviceType
+  backedUp: boolean
+  transports: AuthenticatorTransportFuture[]
+  label: string
+  createdAt: string
+  lastUsedAt: string | null
+}
+
+function parseCount(value: number | string): number {
+  return typeof value === 'number' ? value : Number.parseInt(value, 10)
+}
+
+function parseCounter(value: number | string): number {
+  return typeof value === 'number' ? value : Number.parseInt(value, 10)
+}
+
+function parseTransports(value: AuthenticatorTransportFuture[] | string): AuthenticatorTransportFuture[] {
+  if (Array.isArray(value)) {
+    return value
+  }
+
+  try {
+    const parsed = JSON.parse(value)
+    return Array.isArray(parsed) ? parsed : []
+  } catch {
+    return []
+  }
+}
+
+function mapAuthUser(row: DbUserRow): AuthUser {
+  const passkeyCount = parseCount(row.passkey_count)
+
+  return {
+    id: row.id,
+    username: row.username,
+    fullName: row.full_name,
+    phoneNumber: row.phone_number,
+    role: row.role,
+    isActive: row.is_active,
+    mustChangePassword: row.must_change_password,
+    needsPasskeySetup: passkeyCount === 0,
+    passkeyCount,
+    createdAt: toIsoString(row.created_at) ?? new Date().toISOString(),
+    lastLoginAt: toIsoString(row.last_login_at)
+  }
+}
+
+function mapManagedUser(row: DbUserRow): ManagedUser {
+  return {
+    ...mapAuthUser(row),
+    createdBy: row.created_by
+  }
+}
+
+function mapUserAuthRecord(row: DbUserRow): UserAuthRecord {
+  return {
+    ...mapAuthUser(row),
+    passwordHash: row.password_hash,
+    createdBy: row.created_by
+  }
+}
+
+function mapPasskeyRecord(row: DbPasskeyRow): PasskeyRecord {
+  return {
+    id: row.id,
+    userId: row.user_id,
+    credentialId: row.credential_id,
+    publicKey: row.public_key,
+    counter: parseCounter(row.counter),
+    deviceType: row.device_type,
+    backedUp: row.backed_up,
+    transports: parseTransports(row.transports),
+    label: row.label,
+    createdAt: toIsoString(row.created_at) ?? new Date().toISOString(),
+    lastUsedAt: toIsoString(row.last_used_at)
+  }
+}
+
+function mapPasskeySummary(row: DbPasskeyRow): PasskeySummary {
+  const record = mapPasskeyRecord(row)
+
+  return {
+    id: record.id,
+    label: record.label,
+    createdAt: record.createdAt,
+    lastUsedAt: record.lastUsedAt,
+    deviceType: record.deviceType,
+    backedUp: record.backedUp
+  }
+}
+
+export async function getUserById(userId: string): Promise<UserAuthRecord | null> {
+  await ensureDatabaseReady()
+  const sql = getSqlClient()
+
+  const [row] = await sql<DbUserRow[]>`
+    select
+      users.id,
+      users.username,
+      users.full_name,
+      users.phone_number,
+      users.role,
+      users.password_hash,
+      users.must_change_password,
+      users.is_active,
+      users.created_by,
+      users.created_at,
+      users.last_login_at,
+      coalesce(passkey_totals.passkey_count, 0) as passkey_count
+    from users
+    left join (
+      select user_id, count(*)::int as passkey_count
+      from user_passkeys
+      group by user_id
+    ) as passkey_totals on passkey_totals.user_id = users.id
+    where users.id = ${userId}
+    limit 1
+  `
+
+  return row ? mapUserAuthRecord(row) : null
+}
+
+export async function getUserByUsername(username: string): Promise<UserAuthRecord | null> {
+  await ensureDatabaseReady()
+  const sql = getSqlClient()
+
+  const [row] = await sql<DbUserRow[]>`
+    select
+      users.id,
+      users.username,
+      users.full_name,
+      users.phone_number,
+      users.role,
+      users.password_hash,
+      users.must_change_password,
+      users.is_active,
+      users.created_by,
+      users.created_at,
+      users.last_login_at,
+      coalesce(passkey_totals.passkey_count, 0) as passkey_count
+    from users
+    left join (
+      select user_id, count(*)::int as passkey_count
+      from user_passkeys
+      group by user_id
+    ) as passkey_totals on passkey_totals.user_id = users.id
+    where users.username = ${username}
+    limit 1
+  `
+
+  return row ? mapUserAuthRecord(row) : null
+}
+
+export async function listUsers(): Promise<ManagedUser[]> {
+  await ensureDatabaseReady()
+  const sql = getSqlClient()
+
+  const rows = await sql<DbUserRow[]>`
+    select
+      users.id,
+      users.username,
+      users.full_name,
+      users.phone_number,
+      users.role,
+      users.password_hash,
+      users.must_change_password,
+      users.is_active,
+      users.created_by,
+      users.created_at,
+      users.last_login_at,
+      coalesce(passkey_totals.passkey_count, 0) as passkey_count
+    from users
+    left join (
+      select user_id, count(*)::int as passkey_count
+      from user_passkeys
+      group by user_id
+    ) as passkey_totals on passkey_totals.user_id = users.id
+    order by
+      case when users.role = 'super_admin' then 0 else 1 end,
+      users.created_at asc
+  `
+
+  return rows.map(mapManagedUser)
+}
+
+export async function listPublicContacts(): Promise<PublicContact[]> {
+  await ensureDatabaseReady()
+  const sql = getSqlClient()
+
+  const rows = await sql<Pick<DbUserRow, 'id' | 'full_name' | 'phone_number' | 'role'>[]>`
+    select
+      users.id,
+      users.full_name,
+      users.phone_number,
+      users.role
+    from users
+    where users.is_active = true
+      and users.phone_number is not null
+      and users.phone_number <> ''
+    order by
+      case when users.role = 'super_admin' then 0 else 1 end,
+      users.full_name asc
+  `
+
+  return rows.map((row) => ({
+    id: row.id,
+    fullName: row.full_name,
+    phoneNumber: row.phone_number || '',
+    role: row.role
+  }))
+}
+
+export async function createUser(input: {
+  username: string
+  fullName: string
+  phoneNumber: string
+  role: UserRole
+  passwordHash: string
+  createdBy: string
+}): Promise<UserAuthRecord> {
+  await ensureDatabaseReady()
+  const sql = getSqlClient()
+
+  const [row] = await sql<DbUserRow[]>`
+    insert into users (
+      id,
+      username,
+      full_name,
+      phone_number,
+      role,
+      password_hash,
+      must_change_password,
+      is_active,
+      created_by
+    )
+    values (
+      ${randomUUID()},
+      ${input.username},
+      ${input.fullName},
+      ${input.phoneNumber},
+      ${input.role},
+      ${input.passwordHash},
+      true,
+      true,
+      ${input.createdBy}
+    )
+    returning
+      id,
+      username,
+      full_name,
+      phone_number,
+      role,
+      password_hash,
+      must_change_password,
+      is_active,
+      created_by,
+      created_at,
+      last_login_at,
+      0::int as passkey_count
+  `
+
+  return mapUserAuthRecord(row)
+}
+
+export async function updateUserProfile(input: {
+  userId: string
+  fullName: string
+  phoneNumber: string
+  role: UserRole
+}) {
+  await ensureDatabaseReady()
+  const sql = getSqlClient()
+
+  await sql`
+    update users
+    set
+      full_name = ${input.fullName},
+      phone_number = ${input.phoneNumber},
+      role = ${input.role},
+      updated_at = now()
+    where id = ${input.userId}
+  `
+
+  return getUserById(input.userId)
+}
+
+export async function updateUserPassword(input: {
+  userId: string
+  passwordHash: string
+  mustChangePassword: boolean
+}) {
+  await ensureDatabaseReady()
+  const sql = getSqlClient()
+
+  await sql`
+    update users
+    set
+      password_hash = ${input.passwordHash},
+      must_change_password = ${input.mustChangePassword},
+      updated_at = now()
+    where id = ${input.userId}
+  `
+}
+
+export async function updateLastLogin(userId: string) {
+  await ensureDatabaseReady()
+  const sql = getSqlClient()
+
+  await sql`
+    update users
+    set
+      last_login_at = now(),
+      updated_at = now()
+    where id = ${userId}
+  `
+}
+
+export async function listUserPasskeys(userId: string): Promise<PasskeySummary[]> {
+  await ensureDatabaseReady()
+  const sql = getSqlClient()
+
+  const rows = await sql<DbPasskeyRow[]>`
+    select
+      id,
+      user_id,
+      credential_id,
+      public_key,
+      counter,
+      device_type,
+      backed_up,
+      transports,
+      label,
+      created_at,
+      last_used_at
+    from user_passkeys
+    where user_id = ${userId}
+    order by created_at asc
+  `
+
+  return rows.map(mapPasskeySummary)
+}
+
+export async function getCredentialForVerification(credentialId: string): Promise<PasskeyRecord | null> {
+  await ensureDatabaseReady()
+  const sql = getSqlClient()
+
+  const [row] = await sql<DbPasskeyRow[]>`
+    select
+      id,
+      user_id,
+      credential_id,
+      public_key,
+      counter,
+      device_type,
+      backed_up,
+      transports,
+      label,
+      created_at,
+      last_used_at
+    from user_passkeys
+    where credential_id = ${credentialId}
+    limit 1
+  `
+
+  return row ? mapPasskeyRecord(row) : null
+}
+
+export async function listCredentialDescriptors(userId: string) {
+  await ensureDatabaseReady()
+  const sql = getSqlClient()
+
+  const rows = await sql<Pick<DbPasskeyRow, 'credential_id' | 'transports'>[]>`
+    select credential_id, transports
+    from user_passkeys
+    where user_id = ${userId}
+    order by created_at asc
+  `
+
+  return rows.map((row) => ({
+    id: row.credential_id,
+    transports: parseTransports(row.transports)
+  }))
+}
+
+export async function createUserPasskey(input: {
+  userId: string
+  credentialId: string
+  publicKey: Uint8Array
+  counter: number
+  deviceType: CredentialDeviceType
+  backedUp: boolean
+  transports: AuthenticatorTransportFuture[]
+  label: string
+}) {
+  await ensureDatabaseReady()
+  const sql = getSqlClient()
+
+  await sql`
+    insert into user_passkeys (
+      id,
+      user_id,
+      credential_id,
+      public_key,
+      counter,
+      device_type,
+      backed_up,
+      transports,
+      label
+    )
+    values (
+      ${randomUUID()},
+      ${input.userId},
+      ${input.credentialId},
+      ${encodeBase64Url(input.publicKey)},
+      ${input.counter},
+      ${input.deviceType},
+      ${input.backedUp},
+      ${sql.json(input.transports)},
+      ${input.label}
+    )
+  `
+}
+
+export async function updateCredentialCounter(input: {
+  credentialId: string
+  counter: number
+  deviceType: CredentialDeviceType
+  backedUp: boolean
+}) {
+  await ensureDatabaseReady()
+  const sql = getSqlClient()
+
+  await sql`
+    update user_passkeys
+    set
+      counter = ${input.counter},
+      device_type = ${input.deviceType},
+      backed_up = ${input.backedUp},
+      last_used_at = now()
+    where credential_id = ${input.credentialId}
+  `
+}

server/utils/webauthn.ts

@@ -0,0 +1,104 @@
+import type { H3Event } from 'h3'
+
+import type { AuthenticatorTransportFuture, WebAuthnCredential } from '@simplewebauthn/server'
+
+import { getRequestURL } from 'h3'
+
+import { decodeBase64Url, randomToken } from './base64url'
+import { getRedisClient } from './redis'
+import type { PasskeyRecord } from './user-repository'
+
+const CHALLENGE_TTL_SECONDS = 60 * 5
+
+function getAppOrigin(event: H3Event) {
+  const config = useRuntimeConfig()
+
+  if (config.public.appUrl) {
+    return new URL(config.public.appUrl).origin
+  }
+
+  const url = getRequestURL(event)
+  return `${url.protocol}//${url.host}`
+}
+
+export function getWebAuthnConfig(event: H3Event) {
+  const config = useRuntimeConfig()
+  const origin = getAppOrigin(event)
+  const originUrl = new URL(origin)
+
+  return {
+    origin,
+    rpID: originUrl.hostname,
+    rpName: config.public.rpName || 'Dinner Ticket System'
+  }
+}
+
+function getRegistrationChallengeKey(userId: string) {
+  return `webauthn:register:${userId}`
+}
+
+function getLoginChallengeKey(token: string) {
+  return `webauthn:login:${token}`
+}
+
+export async function storeRegistrationChallenge(userId: string, challenge: string) {
+  const redis = await getRedisClient()
+
+  await redis.set(getRegistrationChallengeKey(userId), challenge, {
+    expiration: {
+      type: 'EX',
+      value: CHALLENGE_TTL_SECONDS
+    }
+  })
+}
+
+export async function consumeRegistrationChallenge(userId: string) {
+  const redis = await getRedisClient()
+  const key = getRegistrationChallengeKey(userId)
+  const challenge = await redis.get(key)
+
+  if (challenge) {
+    await redis.del(key)
+  }
+
+  return challenge
+}
+
+export async function createLoginChallenge(challenge: string) {
+  const token = randomToken(24)
+  const redis = await getRedisClient()
+
+  await redis.set(getLoginChallengeKey(token), challenge, {
+    expiration: {
+      type: 'EX',
+      value: CHALLENGE_TTL_SECONDS
+    }
+  })
+
+  return token
+}
+
+export async function consumeLoginChallenge(token: string) {
+  const redis = await getRedisClient()
+  const key = getLoginChallengeKey(token)
+  const challenge = await redis.get(key)
+
+  if (challenge) {
+    await redis.del(key)
+  }
+
+  return challenge
+}
+
+export function toWebAuthnCredential(passkey: PasskeyRecord): WebAuthnCredential {
+  return {
+    id: passkey.credentialId,
+    publicKey: decodeBase64Url(passkey.publicKey),
+    counter: passkey.counter,
+    transports: passkey.transports as AuthenticatorTransportFuture[]
+  }
+}
+
+export function buildPasskeyLabel() {
+  return `Passkey ${new Date().toISOString().slice(0, 16).replace('T', ' ')}`
+}