harheimertc/server/api/auth/register-passkey-options.post.js

import crypto from 'crypto'
import { generateRegistrationOptions } from '@simplewebauthn/server'
import { readUsers } from '../../utils/auth.js'
import { getWebAuthnConfig } from '../../utils/webauthn-config.js'
import { setPreRegistration } from '../../utils/webauthn-challenges.js'
import { writeAuditLog } from '../../utils/audit-log.js'

function isValidEmail(email) {
  return /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(String(email || ''))
}

export default defineEventHandler(async (event) => {
  const requestStart = Date.now()
  const requestOrigin = getHeader(event, 'origin')
  const userAgent = getHeader(event, 'user-agent')
  const nodeEnv = process.env.NODE_ENV || 'development'
  
  // Debug-Ausgaben immer ausgeben (nicht nur in dev)
  console.log('[DEBUG] register-passkey-options request received', {
    origin: requestOrigin,
    userAgent: userAgent?.substring(0, 100),
    method: getMethod(event),
    timestamp: new Date().toISOString(),
    nodeEnv: nodeEnv,
    pid: process.pid
  })

  const body = await readBody(event)
  const name = String(body?.name || '').trim()
  const email = String(body?.email || '').trim().toLowerCase()
  const phone = String(body?.phone || '').trim()

  console.log('[DEBUG] Request body parsed', {
    hasName: !!name,
    hasEmail: !!email,
    hasPhone: !!phone,
    email: email.substring(0, 10) + '...'
  })

  if (!name || !email) {
    console.error('[DEBUG] Validation failed: missing name or email')
    throw createError({ statusCode: 400, message: 'Name und E-Mail sind erforderlich' })
  }
  if (!isValidEmail(email)) {
    console.error('[DEBUG] Validation failed: invalid email format')
    throw createError({ statusCode: 400, message: 'Ungültige E-Mail-Adresse' })
  }

  const users = await readUsers()
  if (users.some(u => String(u.email || '').toLowerCase() === email)) {
    throw createError({ statusCode: 409, message: 'Ein Benutzer mit dieser E-Mail-Adresse existiert bereits' })
  }

  const { rpId, rpName, origin: webauthnOrigin } = getWebAuthnConfig()
  
  console.log('[DEBUG] WebAuthn config', {
    rpId,
    rpName,
    webauthnOrigin,
    requestOrigin,
    webauthnOriginEnv: process.env.WEBAUTHN_ORIGIN,
    baseUrlEnv: process.env.NUXT_PUBLIC_BASE_URL
  })
  
  // WICHTIG: Sicherstellen, dass die Origin KEINEN Port hat
  if (webauthnOrigin.includes(':3100')) {
    console.error('[DEBUG] ERROR: webauthnOrigin contains port 3100! This will cause verification to fail.')
    console.error('[DEBUG] Fix: Set WEBAUTHN_ORIGIN=https://harheimertc.tsschulz.de (without port) in .env')
  }

  const userId = crypto.randomUUID()
  const registrationId = crypto.randomBytes(16).toString('hex')
  
  console.log('[DEBUG] Generated IDs', {
    userId,
    registrationId
  })

  console.log('[DEBUG] Generating registration options...')
  const optionsStart = Date.now()
  
  const options = await generateRegistrationOptions({
    rpName,
    rpID: rpId,
    userID: new TextEncoder().encode(String(userId)),
    userName: email,
    userDisplayName: name,
    attestationType: 'none',
    authenticatorSelection: {
      residentKey: 'preferred',
      userVerification: 'preferred'
    },
    // Timeout erhöhen für Cross-Device (Standard: 60s, hier: 5 Minuten)
    timeout: 300000
  })
  
  const optionsDuration = Date.now() - optionsStart
  console.log(`[DEBUG] Registration options generated (${optionsDuration}ms)`, {
    hasChallenge: !!options.challenge,
    challengeLength: options.challenge?.length,
    rpId: options.rp?.id,
    rpName: options.rp?.name,
    userId: options.user?.id ? 'present' : 'missing',
    userName: options.user?.name,
    userDisplayName: options.user?.displayName,
    timeout: options.timeout,
    pubKeyCredParamsCount: options.pubKeyCredParams?.length,
    authenticatorSelection: options.authenticatorSelection,
    excludeCredentialsCount: options.excludeCredentials?.length || 0
  })

  setPreRegistration(registrationId, {
    challenge: options.challenge,
    userId,
    name,
    email,
    phone
  })
  
  console.log('[DEBUG] Pre-registration stored', {
    registrationId,
    challengeStored: !!options.challenge
  })

  await writeAuditLog('auth.passkey.prereg.options', { email })

  // CORS-Header für Cross-Device Authentication
  // WICHTIG: Für Cross-Device muss CORS korrekt konfiguriert sein
  // OPTIONS-Requests werden von .options.js behandelt
  const allowedOrigin = requestOrigin || webauthnOrigin
  
  if (allowedOrigin) {
    setHeader(event, 'Access-Control-Allow-Origin', allowedOrigin)
    setHeader(event, 'Access-Control-Allow-Credentials', 'true')
    setHeader(event, 'Access-Control-Allow-Methods', 'GET, POST, OPTIONS')
    setHeader(event, 'Access-Control-Allow-Headers', 'Content-Type, Authorization, Origin, X-Requested-With')
    setHeader(event, 'Access-Control-Max-Age', '86400') // 24 Stunden Cache für Preflight
    console.log('[DEBUG] CORS headers set for POST', { 
      origin: allowedOrigin,
      requestOrigin,
      webauthnOrigin
    })
  }

  // Options direkt zurückgeben (wie in passkeys/registration-options.post.js)
  // @simplewebauthn/server gibt bereits korrekt formatierte Options zurück
  const totalDuration = Date.now() - requestStart
  
  // Debug: Prüfe die vollständige Options-Struktur
  console.log(`[DEBUG] Returning options (total: ${totalDuration}ms)`, {
    registrationId,
    optionsKeys: Object.keys(options),
    challengeLength: options.challenge?.length,
    challengeType: typeof options.challenge,
    rpId: options.rp?.id,
    rpName: options.rp?.name,
    userIdType: typeof options.user?.id,
    userName: options.user?.name,
    userDisplayName: options.user?.displayName,
    timeout: options.timeout,
    timeoutType: typeof options.timeout,
    pubKeyCredParamsCount: options.pubKeyCredParams?.length,
    authenticatorSelection: options.authenticatorSelection,
    hasExtensions: !!options.extensions,
    hasHints: !!options.hints,
    excludeCredentialsCount: options.excludeCredentials?.length || 0
  })
  
  // WICHTIG: Prüfe, ob die Options für Cross-Device korrekt sind
  // Für Cross-Device muss die Challenge ein String sein (Base64URL)
  if (typeof options.challenge !== 'string') {
    console.error('[DEBUG] ERROR: Challenge is not a string!', typeof options.challenge, options.challenge)
  }
  
  // Prüfe, ob user.id ein Uint8Array ist (wird zu Base64URL konvertiert)
  if (options.user?.id instanceof Uint8Array) {
    console.log('[DEBUG] user.id is Uint8Array (will be converted to Base64URL by browser)')
  } else {
    console.log('[DEBUG] user.id type:', typeof options.user?.id, 'value:', options.user?.id?.substring?.(0, 20))
  }

  // WICHTIG: Options direkt zurückgeben, keine manuelle Serialisierung
  // Die Options von @simplewebauthn/server sind bereits korrekt formatiert
  // Nuxt/Nitro serialisiert automatisch zu JSON
  return { success: true, registrationId, options }
})