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<?php
/**
* Unauthenticated File Upload Handler for Jetpack Forms.
*
* @package automattic/jetpack
*/
namespace Automattic\Jetpack;
use Automattic\Jetpack\Connection\Tokens;
use Automattic\Jetpack\Extensions\Premium_Content\JWT;
use Automattic\Jetpack\Status\Host;
/**
* Handles temporary file uploads from unauthenticated users.
*/
class Unauth_File_Upload_Handler {
/**
* Generate a JWT token for file upload authorization.
*
* @param array $claims The claims to include in the token.
* @return string The generated JWT token.
*/
public function generate_upload_token( $claims = array() ) {
$default_claims = array(
'exp' => time() + 3600, // 1 hour expiration
'ip' => isset( $_SERVER['REMOTE_ADDR'] ) ? sanitize_text_field( wp_unslash( $_SERVER['REMOTE_ADDR'] ) ) : '',
'iat' => time(),
);
$claims = wp_parse_args( $claims, $default_claims );
// Get the secret key for signing
$secret = $this->get_upload_token_secret();
// Generate and return the token
return JWT::encode( $claims, $secret, 'HS256' );
}
/**
* Get the secret key for signing upload tokens.
*
* @return string|false The secret key or false if not available.
*/
private function get_upload_token_secret() {
if ( ( new Host() )->is_wpcom_simple() ) {
// phpcs:ignore ImportDetection.Imports.RequireImports.Symbol
// TODO: This is a temporary solution to get the secret key for the upload token.
return defined( 'EARN_JWT_SIGNING_KEY' ) ? EARN_JWT_SIGNING_KEY : false;
}
$token = ( new Tokens() )->get_access_token();
if ( ! isset( $token->secret ) ) {
return false;
}
return $token->secret;
}
/**
* Verify a JWT upload token.
*
* @param string $token The JWT token to verify.
* @return object|false The token claims if valid, false if invalid.
*/
public function verify_upload_token( $token ) {
try {
$secret = $this->get_upload_token_secret();
return JWT::decode( $token, $secret, array( 'HS256' ) );
} catch ( \Exception $e ) {
return false;
}
}
}