การตรวจสอบสิทธิ์ซ้ำด้วยพาสคีย์

// Node.js step-up options generation example
router.post("/api/reauth/options", enforceActiveSession, async (req, res) => {
  const userPasskeys = await db.findCredentialsByUserId(req.user.id);

  const options = {
    challenge: serverGeneratedBase64UrlChallenge, // Random challenge stored in user session
    rpId: "example.com",
    // Enforce allowance strictly limited to the user's credentials list
    allowCredentials: userPasskeys.map((cred) => ({
      type: "public-key",
      id: cred.id,
      transports: cred.transports, // Speeds up resolution by indicating platform transports
    })),
  };
  return res.json(options);
});

<button id="reauth-btn" data-testid="reauth-button">Confirm Transaction</button>

let reauthAbortController = new AbortController();

async function triggerButtonReauth() {
  // Abort any background suggestion flows to avoid passkey prompt collisions
  reauthAbortController.abort();
  reauthAbortController = new AbortController();

  const optionsResponse = await fetch("/api/reauth/options", {
    method: "POST",
  });
  const optionsJSON = await optionsResponse.json();
  const publicKey =
    PublicKeyCredential.parseRequestOptionsFromJSON(optionsJSON);

  try {
    const credential = await navigator.credentials.get({
      publicKey,
      signal: reauthAbortController.signal,
    });

    if (credential) {
      const encodedCredential = credential.toJSON();
      const verifyResponse = await fetch("/api/reauth/verify", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify(encodedCredential),
      });

      if (verifyResponse.ok) {
        showTransactionSuccessUI();
      } else if (verifyResponse.status === 404 && PublicKeyCredential.signalUnknownCredential) {
        await PublicKeyCredential.signalUnknownCredential({
          rpId, // RP ID must match the one defined on the server
          credentialId: encodedCredential.id
        });
      }
    }
  } catch (err) {
    if (err.name === "NotAllowedError") {
      console.log("User cancelled reauthentication.");
    }
  }
}

document
  .getElementById("reauth-btn")
  .addEventListener("click", triggerButtonReauth);

import 'webauthn-polyfills';

import 'webauthn-polyfills';