Hidayat Mahetar

HeadlessKey – JWT Auth extends the REST API to provide a robust and secure authentication system using JSON Web Tokens (JWT). Designed for Headless WordPress, it enables seamless user authentication, registration, and session management via standard REST endpoints.
<h3>Key Features</h3>
<ul>
<li>Standard JWT Authentication: Secure user authentication using industry-standard RFC 7519 tokens.</li>
<li>Multiple Algorithms: Support for <code>HS256</code>, <code>RS256</code>, and <code>ES256</code> signing algorithms.</li>
<li>Comprehensive Endpoints: Ready-to-use endpoints for Login, Register, Token Refresh, and Password Management.</li>
<li>Single Sign-On (SSO): Connect multiple sites with a secure, headers-based SSO exchange mechanism.</li>
<li>Role-Based Access Control (RBAC): Configure public or authenticated access for every endpoint.</li>
<li>Brute Force Protection: Protects against attacks by locking users/IPs after failed attempts.</li>
<li>Activity Logs: Detailed audit trail of all authentication events, including IP and device data.</li>
<li>Security Webhooks: Real-time JSON events sent to your external services for monitoring key actions.</li>
<li>Device Limits: Restrict the number of active devices/sessions per user.</li>
<li>Developer Friendly: Extensive hooks and filters for deep customization.</li>
</ul>
<h3>Configuration</h3>
<h3>Secret Key</h3>
The plugin uses a secret key to sign tokens. By default, a secure random key is generated. For better security and consistency across environments, define your key in <code>wp-config.php</code>:
<pre><code>define('headlesskey_SECRET_KEY', 'your-long-random-secure-string');
</code></pre>
You can generate a strong salt here: <a href="https://api.wordpress.org/secret-key/1.1/salt/" rel="nofollow ugc">WordPress Salt Generator</a>
<h3>CORS Support</h3>
Cross-Origin Resource Sharing (CORS) is enabled by default to allow frontend applications to connect. To disable or customize it via constant:
<pre><code>define('headlesskey_CORS', true); // or false to disable
</code></pre>
<h3>REST API Namespace</h3>
By default, endpoints are under <code>wp-json/wpauthapi/v1</code>. You can customize this namespace:
<pre><code>define('headlesskey_REST_NAMESPACE', 'my-custom-auth');
define('headlesskey_REST_VERSION', 'v2');<h3>Endpoints</h3>
</code></pre>
The plugin adds the following endpoints under the <code>/wp-json/headlesskey/v1</code> namespace:
 Endpoint 
 HTTP Verb 
 Description
 <code>/token</code> 
 POST 
 Login: Exchange username/password for a JWT.
 <code>/token/validate</code> 
 POST 
 Validate: Check if a token validity.
 <code>/token/refresh</code> 
 POST 
 Refresh: Exchange a valid token for a new one (rotation).
 <code>/token/revoke</code> 
 POST 
 Logout: Invalidate a specific token.
 <code>/register</code> 
 POST 
 Register: Create a new user account.
 <code>/login</code> 
 POST 
 Profile: Login and get full user profile data in one request.
 <code>/forgot-password</code> 
 POST 
 Recover: Request a password reset via Link or OTP.
 <code>/reset-password</code> 
 POST 
 Reset: Set a new password using a token or OTP.
 <code>/change-password</code> 
 POST 
 Update: Change password for authenticated user.
 <code>/sso/exchange</code> 
 POST 
 SSO: Exchange a remote site token for a local session.
<h3>1. Login (Generate Token)</h3>
Endpoint: <code>POST /wp-json/headlesskey/v1/token</code> 
Description: Authenticate a user and generate a JWT token.
Request: 
 <code>json 
{ 
 "username": "admin", 
 "password": "secret-password" 
}</code>
Response: 
 <code>json 
{ 
 "token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9...", 
 "expiration": "2023-10-27T10:00:00+00:00", 
 "expires_in": 3600, 
 "user": { 
 "ID": 1, 
 "user_login": "admin", 
 "user_email": "admin@example.com", 
 "display_name": "Administrator", 
 "roles": ["administrator"] 
 }, 
 "refreshable": true, 
 "jti": "545086b9-450f-488b-a70d-3047d14d1101" 
}</code>
<h3>2. Validate Token</h3>
Endpoint: <code>POST /wp-json/headlesskey/v1/token/validate</code> 
Description: Validate if an existing token is valid.
Request: 
 <code>json 
{ 
 "token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9..." 
}</code>
Response: 
 <code>json 
{ 
 "valid": true, 
 "data": { 
 "iss": "https://example.com", 
 "iat": 1698393600, 
 "exp": 1698397200, 
 "data": { 
 "ID": 1, 
 "user_login": "admin" 
 } 
 } 
}</code>
<h3>3. Refresh Token</h3>
Endpoint: <code>POST /wp-json/headlesskey/v1/token/refresh</code> 
Description: Rotate an expiring token for a fresh one.
Request: 
 <code>json 
{ 
 "token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9..." 
}</code>
Response: 
 <code>json 
{ 
 "token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.new...", 
 "expiration": "2023-10-27T11:00:00+00:00", 
 "user": { 
 "ID": 1, 
 "user_login": "admin" 
 }, 
 "jti": "new-uuid-v4" 
}</code>
<h3>4. Revoke Token (Logout)</h3>
Endpoint: <code>POST /wp-json/headlesskey/v1/token/revoke</code> 
Description: Invalidate a token immediately.
Request: 
 <code>json 
{ 
 "token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9..." 
}</code>
Response: 
 <code>json 
{ 
 "message": "Token revoked successfully." 
}</code>
<h3>5. Register User</h3>
Endpoint: <code>POST /wp-json/headlesskey/v1/register</code> 
Description: Create a new user account.
Request: 
 <code>json 
{ 
 "username": "johndoe", 
 "email": "john@example.com", 
 "password": "secure-password", 
 "name": "John Doe" 
}</code>
Response: 
 <code>json 
{ 
 "user_id": 45, 
 "user": { 
 "ID": 45, 
 "user_login": "johndoe", 
 "user_email": "john@example.com", 
 "display_name": "John Doe", 
 "roles": ["subscriber"] 
 }, 
 "token_response": { 
 "token": "eyJ0eXAiOiJKV1QiLCJhbGciOi...", 
 "expiration": "2023-10-27T10:00:00+00:00" 
 } 
}</code>
<h3>6. User Profile (Login Extended)</h3>
Endpoint: <code>POST /wp-json/headlesskey/v1/login</code> 
Description: Alternative login endpoint that returns cleaner profile structure.
Request: 
 <code>json 
{ 
 "username": "admin", 
 "password": "secret-password" 
}</code>
Response: 
 <code>json 
{ 
 "token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9...", 
 "expiration": "2023-10-27T10:00:00+00:00", 
 "user": { 
 "ID": 1, 
 "user_login": "admin", 
 "user_email": "admin@example.com", 
 "display_name": "Administrator", 
 "roles": ["administrator"] 
 } 
}</code>
<h3>7. Forgot Password</h3>
Endpoint: <code>POST /wp-json/headlesskey/v1/forgot-password</code> 
Description: Initiate password recovery. Note: <code>delivery</code> can be <code>link</code> or <code>otp</code>.
Request: 
 <code>json 
{ 
 "login": "admin@example.com", 
 "delivery": "link" 
}</code>
Response: 
 <code>json 
{ 
 "message": "Password reset email sent." 
}</code>
<h3>8. Reset Password</h3>
Endpoint: <code>POST /wp-json/headlesskey/v1/reset-password</code> 
Description: Reset password using the token sent via email or OTP.
Request (Link method): 
 <code>json 
{ 
 "login": "admin@example.com", 
 "password": "new-secure-password", 
 "token": "generated-reset-key" 
}</code>
Response: 
 <code>json 
{ 
 "message": "Password updated successfully." 
}</code>
<h3>9. Change Password</h3>
Endpoint: <code>POST /wp-json/headlesskey/v1/change-password</code> 
Description: Change password for currently authenticated user. Requires <code>Authorization</code> header.
Headers: 
 Authorization: Bearer 
Request: 
 <code>json 
{ 
 "current_password": "old-password", 
 "new_password": "new-secure-password" 
}</code>
Response: 
 <code>json 
{ 
 "message": "Password changed successfully. Please login again." 
}</code>
<h3>10. SSO Token Exchange</h3>
Endpoint: <code>POST /wp-json/headlesskey/v1/sso/exchange</code> 
Description: Securely exchange a token from a connected remote site for a local authentication session. This powers the distributed Single Sign-On network.
Request: 
 <code>json 
{ 
 "site_key": "remote-site-id", 
 "token": "remote-jwt-token", 
 "signature": "hmac-sha256-signature" 
}</code>
Response: 
Returns a standard Login response (Token + User Data) if the signature is valid.

HeadlessKey – JWT Auth

A complete authentication solution for Headless WordPress applications using JWT, supporting Registration, SSO, RBAC, and advanced Security features.

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