ユーザーの再認証

アカウントの削除、ユーザーのメールアドレスの更新、パスワードの変更などの機密性の高い操作では、ユーザーが最近ログインしている必要があります。ユーザーが最近ログインしていない場合、このような操作を行うと失敗し、エラーになります。ユースケースに応じて、reauthenticateWithPopup()、reauthenticateWithRedirect()、または reauthenticateWithCredential() を使用できます。

例: ポップアップで Apple ログインを再認証する

Web バージョン 9

import { getAuth, reauthenticateWithPopup, OAuthProvider } from "firebase/auth";

// Result from Redirect auth flow.
const auth = getAuth();
const provider = new OAuthProvider('apple.com');

reauthenticateWithPopup(auth.currentUser, provider)
  .then((result) => {
    // User is re-authenticated with fresh tokens minted and can perform
    // sensitive operations like account deletion, or updating their email
    // address or password.

    // The signed-in user info.
    const user = result.user;

    // You can also get the Apple OAuth Access and ID Tokens.
    const credential = OAuthProvider.credentialFromResult(result);
    const accessToken = credential.accessToken;
    const idToken = credential.idToken;

    // ...
  })
  .catch((error) => {
    // Handle Errors here.
    const errorCode = error.code;
    const errorMessage = error.message;
    // The email of the user's account used.
    const email = error.customData.email;
    // The credential that was used.
    const credential = OAuthProvider.credentialFromError(error);

    // ...
  });
auth_apple_reauthenticate_popup.js

Web バージョン 8

const provider = new firebase.auth.OAuthProvider('apple.com');

firebase
  .auth()
  .currentUser
  .reauthenticateWithPopup(provider)
  .then((result) => {
    // User is re-authenticated with fresh tokens minted and can perform
    // sensitive operations like account deletion, or updating their email
    // address or password.
    /** @type {firebase.auth.OAuthCredential} */
    var credential = result.credential;

    // The signed-in user info.
    var user = result.user;
     // You can also get the Apple OAuth Access and ID Tokens.
    var accessToken = credential.accessToken;
    var idToken = credential.idToken;

    // IdP data available in result.additionalUserInfo.profile.
      // ...
  })
  .catch((error) => {
    // Handle Errors here.
    var errorCode = error.code;
    var errorMessage = error.message;
    // The email of the user's account used.
    var email = error.email;
    // The firebase.auth.AuthCredential type that was used.
    var credential = error.credential;

    // ...
  });
apple.js

例: reauthenticateWithCredential()

Web バージョン 9

import { getAuth, reauthenticateWithCredential } from "firebase/auth";

const auth = getAuth();
const user = auth.currentUser;

// TODO(you): prompt the user to re-provide their sign-in credentials
const credential = promptForCredentials();

reauthenticateWithCredential(user, credential).then(() => {
  // User re-authenticated.
}).catch((error) => {
  // An error ocurred
  // ...
});
auth_reauth_with_credential.js

Web バージョン 8

const user = firebase.auth().currentUser;

// TODO(you): prompt the user to re-provide their sign-in credentials
const credential = promptForCredentials();

user.reauthenticateWithCredential(credential).then(() => {
  // User re-authenticated.
}).catch((error) => {
  // An error occurred
  // ...
});
manage.js