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<p><strong>Auto Login for Sakura Rental Server</strong> allows administrators to issue one-time, time-limited auto-login URLs using HMAC signatures.<br />
This is useful for secure temporary access or system integration.</p>
<p>Features:<br />
– Secure auto-login with one-time tokens<br />
– Tokens are HMAC-signed and invalidated after use<br />
– Token issuance and usage history (up to 100 entries per user)<br />
– Records IP address and username of the issuer<br />
– Rate limiting: 1 request per second per IP<br />
– WP-CLI commands for token generation and history inspection</p>
<p>Example use cases:<br />
– Temporarily granting admin access<br />
– Safe automatic login from external systems<br />
– Keeping an audit log of who issued a token and from where</p>
<h3>Usage</h3>
<h3>Generate a token via CLI</h3>
<pre><code>wp auto-login-for-sakura-rental-server generate <user_id> [–expires=] [–remote_addr=] [–username=]
</code></pre>
<p>Example:</p>
<ul>
<li>Default expiration time: 300 seconds  </li>
<li><code>--expires</code> and <code>--username</code> are optional</li>
</ul>
<h3>Check issue history</h3>
<p>Token history is stored in the user meta key <code>sakura_auto_login_history</code>.<br />
You can check it via WP-CLI:</p>
<p>wp user meta get  sakura_auto_login_history</p>
<h3>Auto-login URL format</h3>
<pre><code>https://example.com/?rs_auto_login_token=<64-character HMAC token>
</code></pre>
<p>Visiting the URL will log in as the corresponding user and redirect to the admin dashboard.</p>
<h3>Security Notes</h3>
<ul>
<li>Tokens are invalidated immediately after use (one-time only)</li>
<li>Issue and usage history includes IP address, issuer username, and timestamps</li>
<li>Stored using <code>update_option()</code> for caching compatibility</li>
<li>HTTPS is strongly recommended</li>
</ul>


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