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For our new friends:

Logto is an Auth0 alternative designed for modern apps and SaaS products. It offers both Cloud and Open-source services to help you quickly launch your identity and management (IAM) system. Enjoy authentication, authorization, and multi-tenant management all in one.

We recommend starting with a free development tenant on Logto Cloud. This allows you to explore all the features easily.

In this article, we will go through the steps to quickly build the Alipay (Web) sign-in experience (user authentication) with WordPress plugin and Logto.

Prerequisites

Create an application in Logto​

Logto is based on OpenID Connect (OIDC) authentication and OAuth 2.0 authorization. It supports federated identity management across multiple applications, commonly called Single Sign-On (SSO).

To create your Traditional web application, simply follow these steps:

  1. Open the Logto Console. In the "Get started" section, click the "View all" link to open the application frameworks list. Alternatively, you can navigate to Logto Console > Applications, and click the "Create application" button. Get started
  2. In the opening modal, click the "Traditional web" section or filter all the available "Traditional web" frameworks using the quick filter checkboxes on the left. Click the "WordPress" framework card to start creating your application. Frameworks
  3. Enter the application name, e.g., "Bookstore," and click "Create application".

🎉 Ta-da! You just created your first application in Logto. You'll see a congrats page which includes a detailed integration guide. Follow the guide to see what the experience will be in your application.

Integrate WordPress with Logto​

Install the plugin​

  1. Go to Plugins > Add New.
  2. Search for "Logto", or enter https://wordpress.org/plugins/logto/ in the search box.
  3. Click Install Now.
  4. Click Activate.

Configure the plugin​

Now you should be able to see the Logto menu in your WordPress admin panel sidebar. Click Logto > Settings to configure the plugin.

note:

You should have a traditional web application created in Logto Console before configuring the plugin. If you haven't created one, please refer to Integrate Logto into your application for more information.

The minimum configuration to get started for the plugin is:

  • Logto endpoint: The endpoint of your Logto tenant.
  • App ID: The app ID of your Logto application.
  • App secret: One of the valid app secrets of your Logto application.

All values can be found on the application details page in Logto Console.

After filling in the values, click Save Changes (scroll down to the bottom of the page if you can't find the button).

Configure redirect URI​

The redirect URI is the URL to which Logto will redirect users after they have authenticated; and the post sign-out redirect URI is the URL to which Logto will redirect users after they have logged out.

Here's a non-normative sequence diagram to illustrate the sign-in flow:

Here's how the sign-out flow looks like in a non-normative sequence diagram:

To learn more about why redirect is needed, see Sign-in experience explained.

In our case, we need to configure both redirect URIs in your Logto Console. To find the redirect URI, go to the Logto > Settings page in your WordPress admin panel. You'll see the Redirect URI and Post sign-out redirect URI fields.

  1. Copy the Redirect URI and Post sign-out redirect URI values and paste them into the Redirect URIs and Post sign-out redirect URIs fields in your Logto Console.
  2. Click Save changes in Logto Console.

Checkpoint: Test your WordPress website​

Now you can test your Logto integration in your WordPress website:

  1. Open an incognito browser window if needed.
  2. Visit your WordPress website and click the Log in link if applicable; or directly visit the login page (e.g., https://example.com/wp-login.php).
  3. The page should redirect you to the Logto sign-in page.
  4. Complete the sign-in or sign-up process.
  5. After successful authentication, you should be redirected back to your WordPress website and logged in automatically.
  6. Click the Log out link to log out of your WordPress website.
  7. You should be redirected to the Logto sign-out page, then back to your WordPress website.
  8. You should be logged out of your WordPress website.

To learn more about the WordPress plugin settings, see WordPress quick start.

Add Alipay (Web) connector​

To enable quick sign-in and improve user conversion, connect with WordPress as an identity provider. The Logto social connector helps you establish this connection in minutes by allowing several parameter inputs.

To add a social connector, simply follow these steps:

  1. Navigate to Console > Connectors > Social Connectors.
  2. Click "Add social connector" and select "Alipay (Web)".
  3. Follow the README guide and complete required fields and customize settings.
Connector tab
note:

If you are following the in-place Connector guide, you can skip the next section.

Set up Alipay web app​

Register Alipay developer account​

Register an Alipay developer account if you don't have one.

Create and configure Alipay app​

  1. Sign in to the Alipay console with the account you have just registered.
  2. Go to "Web & Mobile Apps" (网页&移动应用) tab in "My Application" (我的应用) panel.
  3. Click "Create an App" (立即创建) button to start configuring your application.
  4. Name your application in "Application Name" (应用名称) following the naming conventions and upload your "Application Icon" (应用图标), make sure you choose "web application" (网页应用) as "App type" (应用类型).
  5. After finishing creating the application, we come to the Overview page, where we should click "add ability" (添加能力) to add "Third-party application authorization" (第三方应用授权), "Get member information" (获取会员信息) and "App Alipay login" (App 支付宝登录) before enabling Alipay sign-in.
  6. Go to Alipay Customer Center, and sign in with the Alipay developer account. Click "Account Center" (账号中心) on the topbar and go to "APPID binding" (APPID 绑定), whose entrance can be found at the bottom of the sidebar. "Add binding" (添加绑定) by type in the APPID of the web application you just created in step 4.
  7. Click on "Sign" button of "App Alipay login", and finish signing process following the guide. After finishing this step, you are expected to find abilities you have just added in step 5 kicks in.
  8. Come back to Alipay open platform console page, and you can find "Interface signing method" (接口加签方式（密钥/证书）) in "development information" (开发信息) section. Click "set up" (设置) button, and you can find yourself on a page setting signing method. "Public Key" (公钥) is the preferred signing mode, and fill in contents from the public key file you have generated in the text input box.
  9. Set up "Authorization Redirect URI" (授权回调地址) by clicking "set up" (设置) button on the bottom of the Alipay console page. ${your_logto_origin}/callback/${connector_id} is the default redirect URI used in Logto core. The connector_id can be found on the top bar of the Logto Admin Console connector details page.
  10. After finishing all these steps, go back to the top right corner of Alipay console page, and click "Submit for review" (提交审核). Once the review is approved, you are good to go with a smooth Alipay sign-in flow.
note:

You can use openssl to generate key pairs on your local machine by executing following code snippet in terminal.

openssl genrsa -out private.pem 2048
openssl rsa -in private.pem -outform PEM -pubout -out public.pem

When filling in the public key on the Alipay app setup website, you need to remove the header and footer of public.pem, delete all newline characters, and paste the rest of the contents into the text input box for "public key".

Set up the Logto Alipay Web connector settings​

  1. In the Alipay console workspace go to "My application" (我的应用) panel and click "Web & Mobile Apps" (网页&移动应用) tab, you can find APPID of all applications.
  2. In step 7 of the previous part, you have already generated a key pair including a private key and a public key.
  3. Fill out the Logto connector settings:
    • Fill out the appId field with APPID you've got from step 1.
    • Fill out the privateKey field with contents from the private key file mentioned in step 2. Please MAKE SURE to use '\n' to replace all newline characters and do not remove header and footer in private key file.
    • Fill out the signType field with 'RSA2' due to the Public key signing mode we chose in step 7 of "Create And Configure Alipay Apps".
    • Fill out the charset field with either 'gbk' or 'utf8'. You can leave this field blank as it is OPTIONAL. The default value is set to be 'utf8'.
    • Fill out the scope field with either 'auth_base' or 'auth_user'. You can leave this field blank as it is OPTIONAL. The default value is set to be 'auth_user'. You can check out the difference between different values.

Config types​

NameTypeEnum values
appIdstringN/A
privateKeystringN/A
signTypeenum string'RSA' | 'RSA2'
charsetenum string (OPTIONAL)'gbk' | 'utf8' | undefined
scopeenum string (OPTIONAL)'auth_user' | 'auth_base'

Save your configuration​

Double check you have filled out necessary values in the Logto connector configuration area. Click "Save and Done" (or "Save changes") and the Alipay (Web) connector should be available now.

Enable Alipay (Web) connector in Sign-in Experience​

Once you create a social connector successfully, you can enable it as a "Continue with Alipay (Web)" button in Sign-in Experience.

  1. Navigate to Console > Sign-in experience > Sign-up and sign-in.
  2. (Optional) Choose "Not applicable" for sign-up identifier if you need social login only.
  3. Add configured Alipay (Web) connector to the "Social sign-in" section.
Sign-in Experience tab

Testing and Validation​

Return to your WordPress plugin app. You should now be able to sign in with Alipay (Web). Enjoy!

Further readings​

End-user flows: Logto provides a out-of-the-box authentication flows including MFA and enterprise SSO, along with powerful APIs for flexible implementation of account settings, security verification, and multi-tenant experience.

Authorization: Authorization defines the actions a user can do or resources they can access after being authenticated. Explore how to protect your API for native and single-page applications and implement Role-based Access Control (RBAC).

Organizations: Particularly effective in multi-tenant SaaS and B2B apps, the organization feature enable tenant creation, member management, organization-level RBAC, and just-in-time-provisioning.

Customer IAM series Our serial blog posts about Customer (or Consumer) Identity and Access Management, from 101 to advanced topics and beyond.