config = $config;
$this->licenseService = $licenseService;
$this->all_addons_transient_name = $this->config->get_core_plugin_slug() . '_gvectors_all_addons';
$this->signature_check_hook = $this->config->get_core_plugin_slug() . '_gvectors_addon_signature_check';
$this->license_check_hook = $this->config->get_core_plugin_slug() . '_gvectors_addon_license_check';
$this->tampered_option = $this->licenseService->tampered_option;
$this->expired_notice_option = $this->licenseService->expired_notice_option;
$this->tamper_dismissed_option = $this->config->get_core_plugin_slug() . '_gvectors_tamper_notice_seen';
$this->legacy_licenses_option = $this->config->get_core_plugin_slug() . '_gvectors_legacy_addon_licenses';
$this->legacy_notice_option = $this->config->get_core_plugin_slug() . '_gvectors_legacy_license_notices';
$this->init_hooks();
}
private function init_hooks() {
add_filter( 'pre_set_site_transient_update_plugins', [ $this, 'check_for_updates' ] );
add_filter( 'plugins_api', [ $this, 'plugin_info' ], 20, 3 );
// Force-refresh the update transient if unmigrated legacy addons exist
add_action( 'admin_init', [ $this, 'maybe_refresh_update_transient' ] );
// Show license-required notice on plugin page for addons with updates but no active license
add_action( 'admin_init', [ $this, 'register_unlicensed_update_row_hooks' ] );
// Signature integrity check cron (twice daily)
add_action( $this->signature_check_hook, [ $this, 'verify_all_addon_signatures' ] );
if( ! wp_next_scheduled( $this->signature_check_hook ) ) {
wp_schedule_event( time(), 'twicedaily', $this->signature_check_hook );
}
// License validity check cron (daily)
add_action( $this->license_check_hook, [ $this, 'check_all_license_validity' ] );
if( ! wp_next_scheduled( $this->license_check_hook ) ) {
wp_schedule_event( time(), 'daily', $this->license_check_hook );
}
// Admin notices
add_action( 'admin_notices', [ $this, 'tampered_addon_notice' ] );
add_action( 'admin_notices', [ $this, 'expired_license_notice' ] );
add_action( 'admin_notices', [ $this, 'legacy_license_notice' ] );
add_action( 'admin_notices', [ $this, 'dev_environment_notice' ] );
add_action( 'admin_notices', [ $this, 'dev_licenses_notice' ] );
// Handle dismissal of dev environment notices
add_action( 'admin_init', [ $this, 'handle_dev_notice_dismiss' ] );
// Track when admin has seen tamper notices
add_action( 'admin_init', [ $this, 'track_tamper_notice_view' ] );
// Intercept plugin activation to validate addon before allowing it
add_action( 'activate_plugin', [ $this, 'validate_on_activation' ] );
// Intercept WordPress updater downloads to block tampered addons with a visible error
add_filter( 'upgrader_pre_download', [ $this, 'block_tampered_update_download' ], 10, 2 );
// Clear tamper flag when a plugin is deleted
add_action( 'deleted_plugin', [ $this, 'on_plugin_deleted' ], 10, 2 );
}
/**
* Install and activate an addon in one step
*/
public function install_and_activate( string $product_id ): array {
$install_result = $this->install( $product_id );
if( empty( $install_result['success'] ) ) return $install_result;
$plugin_file = $install_result['plugin_file'];
if( empty( $plugin_file ) ) {
return [ 'success' => false, 'error' => __( 'Could not determine plugin file after installation', 'gvectors' ) ];
}
$activate_result = $this->activate( $plugin_file );
if( empty( $activate_result['success'] ) ) return $activate_result;
// Clear cached plugin list so subsequent get_plugins() calls see the new addon
wp_cache_delete( 'plugins', 'plugins' );
return [
'success' => true,
'message' => __( 'Addon installed and activated successfully', 'gvectors' ),
];
}
/**
* Download and install an addon from the proxy server
*/
public function install( string $product_id ): array {
if( ! current_user_can( 'install_plugins' ) ) {
return [ 'success' => false, 'error' => __( 'Permission denied', 'gvectors' ) ];
}
$license = $this->licenseService->get( $product_id );
if( empty( $license ) || empty( $license['license_key'] ) ) {
return [ 'success' => false, 'error' => __( 'No active license for this product', 'gvectors' ) ];
}
// Block install/update for tampered/unauthorized addons
$plugin_slug = $license['plugin_slug'] ?? '';
if( $plugin_slug && $this->is_addon_tampered( $plugin_slug ) ) {
return [
'success' => false,
'error' => __(
'This addon cannot be updated because its files have been modified or are not original. To resolve this, please: 1) Go to Plugins and deactivate, then delete this addon. 2) Visit the gVectors Store Addons page and make sure your license is active. 3) Re-install the addon from the gVectors Store Addons page. Once re-installed, everything will work normally again.',
'gvectors'
),
];
}
// Get signed download URL from proxy
$response = $this->licenseService->apiService->get_addon_download_url( $product_id, $license['license_key'] );
error_log( '[gVectors Addon] download-url response: ' . print_r( $response, true ) );
if( empty( $response['success'] ) || empty( $response['data']['download_url'] ) ) {
$error = $response['error'] ?? __( 'Failed to get download URL', 'gvectors' );
if( isset( $response['data']['error'] ) ) $error = $response['data']['error'];
error_log( '[gVectors Addon] Failed to get download URL: ' . $error );
return [ 'success' => false, 'error' => $error ];
}
$download_url = $response['data']['download_url'];
$download_url = add_query_arg( 'site_domain', rawurlencode( LicenseModule::get_site_domain() ), $download_url );
$plugin_slug = $response['data']['plugin_slug'] ?? '';
error_log( '[gVectors Addon] download_url: ' . $download_url . ' | plugin_slug: ' . $plugin_slug );
// Use WordPress built-in plugin installer
require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
require_once ABSPATH . 'wp-admin/includes/plugin-install.php';
require_once ABSPATH . 'wp-admin/includes/file.php';
require_once ABSPATH . 'wp-admin/includes/misc.php';
$skin = new WP_Ajax_Upgrader_Skin();
$upgrader = new Plugin_Upgrader( $skin );
// Check if plugin already installed - if so, upgrade
$installed_plugin = $this->get_installed_plugin_file( $plugin_slug );
if( $installed_plugin ) {
$result = $upgrader->upgrade( $installed_plugin, [ 'clear_update_cache' => true ] );
} else {
$result = $upgrader->install( $download_url );
}
if( is_wp_error( $result ) ) {
error_log( '[gVectors Addon] WP_Error from upgrader: ' . $result->get_error_message() );
return [ 'success' => false, 'error' => $result->get_error_message() ];
}
if( $result === false ) {
$errors = $skin->get_errors();
$error = is_wp_error( $errors ) ? $errors->get_error_message() : __( 'Installation failed', 'gvectors' );
$skin_feedback = method_exists( $skin, 'get_upgrade_messages' ) ? $skin->get_upgrade_messages() : [];
error_log( '[gVectors Addon] Install result=false. Error: ' . $error . ' | Feedback: ' . print_r( $skin_feedback, true ) );
return [ 'success' => false, 'error' => $error ];
}
error_log( '[gVectors Addon] Install result: ' . print_r( $result, true ) );
error_log( '[gVectors Addon] Skin messages: ' . print_r( $skin->get_upgrade_messages(), true ) );
$plugin_file = $installed_plugin ?: $upgrader->plugin_info();
// Fallback: if plugin_info() returned empty, re-scan installed plugins by slug
if( empty( $plugin_file ) && ! empty( $plugin_slug ) ) {
// Clear cached plugin list so get_plugins() picks up the newly installed addon
wp_cache_delete( 'plugins', 'plugins' );
$plugin_file = $this->get_installed_plugin_file( $plugin_slug );
}
// Last resort: scan the plugin directory for a file with a Plugin Name header
if( empty( $plugin_file ) && ! empty( $plugin_slug ) ) {
$plugin_dir = WP_PLUGIN_DIR . '/' . $plugin_slug;
if( is_dir( $plugin_dir ) ) {
foreach( glob( $plugin_dir . '/*.php' ) as $php_file ) {
$headers = get_plugin_data( $php_file, false, false );
if( ! empty( $headers['Name'] ) ) {
$plugin_file = $plugin_slug . '/' . basename( $php_file );
break;
}
}
}
}
// Verify file signatures after installation — if verification fails, block activation
if( $plugin_slug ) {
$sig_result = $this->verify_addon_signatures( $plugin_slug );
if( ! in_array( $sig_result, [ 'valid', 'legacy_valid' ], true ) ) {
// Signatures invalid after fresh installation — possible MITM or corrupted download
if( $plugin_file && is_plugin_active( $plugin_file ) ) {
deactivate_plugins( $plugin_file );
}
return [
'success' => false,
'error' => __( 'Addon installed but signature verification failed. The download may have been corrupted. Please try again.', 'gvectors' ),
];
}
}
return [
'success' => true,
'plugin_file' => $plugin_file,
'message' => __( 'Addon installed successfully', 'gvectors' ),
];
}
/**
* Check if an addon is flagged as tampered/unauthorized
*/
public function is_addon_tampered( string $plugin_slug ): bool {
$tampered = get_option( $this->tampered_option, [] );
return isset( $tampered[ $plugin_slug ] );
}
/**
* Find the installed plugin file by slug
*/
private function get_installed_plugin_file( string $plugin_slug ): string {
if( empty( $plugin_slug ) ) return '';
if( ! function_exists( 'get_plugins' ) ) {
require_once ABSPATH . 'wp-admin/includes/plugin.php';
}
$all_plugins = get_plugins();
foreach( $all_plugins as $file => $data ) {
if( strpos( $file, $plugin_slug . '/' ) === 0 ) {
return $file;
}
}
return '';
}
/**
* Provide plugin info for the WordPress updater popup ("View version X details").
* Uses proxy server data for version/compatibility info (from addon file headers).
* Does NOT fetch download URL — that is handled by check_for_updates() in the update transient.
*/
public function plugin_info( $result, $action, $args ) {
if( $action !== 'plugin_information' ) return $result;
// Fetch addon metadata from proxy server (cached via transient)
$proxy_addons = $this->get_proxy_addons_map();
if( ! isset( $proxy_addons[ $args->slug ] ) ) return $result;
$proxy_info = $proxy_addons[ $args->slug ];
$info = new stdClass();
$info->name = ! empty( $proxy_info['name'] ) ? $proxy_info['name'] : $args->slug;
$info->slug = $args->slug;
$info->version = ! empty( $proxy_info['version'] ) ? $proxy_info['version'] : '';
$info->author = ! empty( $proxy_info['author'] ) ? $proxy_info['author'] : 'gVectors Team';
$info->author_profile = ! empty( $proxy_info['author_uri'] ) ? $proxy_info['author_uri'] : 'https://gvectors.com';
$info->homepage = ! empty( $proxy_info['plugin_uri'] ) ? $proxy_info['plugin_uri'] : 'https://gvectors.com';
$info->requires = ! empty( $proxy_info['requires'] ) ? $proxy_info['requires'] : '5.0';
$info->tested = ! empty( $proxy_info['tested'] ) ? $proxy_info['tested'] : get_bloginfo( 'version' );
$info->requires_php = ! empty( $proxy_info['requires_php'] ) ? $proxy_info['requires_php'] : '7.4';
$info->download_link = ''; // No download URL here — WordPress uses $update->package from the transient
$info->sections = [
'description' => ! empty( $proxy_info['description'] ) ? $proxy_info['description'] : '',
'changelog' => ! empty( $proxy_info['changelog'] ) ? $proxy_info['changelog'] : '',
];
// Use the addon's featured image from Paddle as the update popup banner
if( ! empty( $proxy_info['image_url'] ) ) {
$info->banners = [
'high' => $proxy_info['image_url'],
'low' => $proxy_info['image_url'],
];
}
// Use the logo as the plugin icon
if( ! empty( $proxy_info['logo'] ) ) {
$info->icons = [
'1x' => $proxy_info['logo'],
'2x' => $proxy_info['logo'],
];
}
return $info;
}
/**
* Fetch all addon info from the proxy server, keyed by slug.
* Returns associative array: slug => [ name, version, description, author, requires, tested, requires_php, plugin_uri, ... ]
*/
private function get_proxy_addons_map(): array {
$response = $this->licenseService->apiService->get_all_addons();
if( empty( $response['success'] ) || empty( $response['data']['addons'] ) ) {
return [];
}
$map = [];
foreach( $response['data']['addons'] as $addon ) {
if( ! empty( $addon['slug'] ) ) {
$map[ $addon['slug'] ] = $addon;
}
}
return $map;
}
/**
* Verify signatures of a single addon by its slug.
* Checks: manifest existence, file hashes, domain signature, PHP header signatures.
* For addons without a manifest, checks legacy license before flagging as tampered.
* Returns 'valid', 'legacy_valid', 'no_manifest', 'tampered', 'domain_mismatch', 'no_signatures', or 'patched'.
*/
public function verify_addon_signatures( string $plugin_slug ): string {
// Development/local/staging environments are always valid
if( LicenseModule::is_development_site() ) return 'valid';
$plugin_slug = self::sanitize_slug( $plugin_slug );
$plugin_dir = WP_PLUGIN_DIR . '/' . $plugin_slug;
$manifest_file = $plugin_dir . '/.addon-signatures.json';
// No manifest at all — could be a pirated copy OR a legacy-licensed installation
// from before the new signature system. Check legacy license before flagging.
if( ! file_exists( $manifest_file ) ) {
// Always check for nulled/patched patterns first (catches case 4 regardless)
$patch_check = $this->detect_nulled_patterns( $plugin_slug );
if( $patch_check !== 'valid' ) {
return $patch_check;
}
// Check if this addon has a legacy license from the old gVectors system
$legacy = $this->check_legacy_license( $plugin_slug );
if( ! empty( $legacy['has_license'] ) ) {
// Legacy licensed addon — clear any previous tamper flags
$this->clear_tamper_flag( $plugin_slug );
// Track expired legacy licenses for admin notice
$this->update_legacy_notice( $plugin_slug, $legacy );
return 'legacy_valid';
}
// No legacy license either — this is an unauthorized copy
$this->mark_addon_tampered( $plugin_slug, [ 'Missing signature manifest' ], 'no_manifest' );
return 'no_manifest';
}
$raw_manifest = json_decode( file_get_contents( $manifest_file ), true );
if( ! is_array( $raw_manifest ) || empty( $raw_manifest ) ) {
$this->mark_addon_tampered( $plugin_slug, [ 'Empty or corrupted signature manifest' ] );
return 'tampered';
}
// Support both new format { "files": {...}, "manifest_signature": "..." }
// and legacy format { "file.php": {...} } for backwards compatibility
if( isset( $raw_manifest['files'] ) && is_array( $raw_manifest['files'] ) ) {
$manifest = $raw_manifest['files'];
$manifest_signature = $raw_manifest['manifest_signature'] ?? null;
} else {
$manifest = $raw_manifest;
$manifest_signature = null;
}
if( empty( $manifest ) ) {
$this->mark_addon_tampered( $plugin_slug, [ 'Empty signature manifest (no files)' ] );
return 'tampered';
}
// 0) Verify manifest cryptographic signature (Ed25519)
// Prevents manifest forgery — attacker cannot modify signed_for/file_hash/signatures
// without invalidating the signature, and cannot re-sign without the server's private key.
if( $manifest_signature !== null
&& $this->config->get_manifest_public_key() !== 'REPLACE_WITH_YOUR_ED25519_PUBLIC_KEY_HEX'
&& function_exists( 'sodium_crypto_sign_verify_detached' )
) {
try {
$canonical_json = json_encode( $manifest, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE );
$public_key = sodium_hex2bin( $this->config->get_manifest_public_key() );
$sig = sodium_hex2bin( $manifest_signature );
if( ! sodium_crypto_sign_verify_detached( $sig, $canonical_json, $public_key ) ) {
$this->mark_addon_tampered( $plugin_slug, [ 'Manifest cryptographic signature is invalid — possible forgery' ] );
return 'tampered';
}
} catch ( SodiumException $e ) {
$this->mark_addon_tampered( $plugin_slug, [ 'Manifest signature corrupted: ' . $e->getMessage() ] );
return 'tampered';
}
}
// 1) Verify file hashes
$tampered_files = [];
$real_plugin_dir = realpath( $plugin_dir );
foreach( $manifest as $relative_path => $info ) {
// Prevent path traversal via crafted manifest keys
if( strpos( $relative_path, '..' ) !== false || strpos( $relative_path, '/' ) === 0 ) {
$this->mark_addon_tampered( $plugin_slug, [ 'Manifest contains invalid path: ' . $relative_path ] );
return 'tampered';
}
$file_path = $plugin_dir . '/' . $relative_path;
if( ! file_exists( $file_path ) ) {
$tampered_files[] = $relative_path . ' (missing)';
continue;
}
// Verify resolved path is within the plugin directory (prevents symlink escapes)
if( $real_plugin_dir ) {
$real_file = realpath( $file_path );
if( $real_file === false || strpos( $real_file, $real_plugin_dir . DIRECTORY_SEPARATOR ) !== 0 ) {
$this->mark_addon_tampered( $plugin_slug, [ 'File escapes plugin directory: ' . $relative_path ] );
return 'tampered';
}
}
$current_hash = hash( 'sha256', file_get_contents( $file_path ) );
if( isset( $info['file_hash'] ) && $current_hash !== $info['file_hash'] ) {
$tampered_files[] = $relative_path;
}
}
if( ! empty( $tampered_files ) ) {
$this->mark_addon_tampered( $plugin_slug, $tampered_files );
return 'tampered';
}
// 2) Verify domain signature matches this site
$site_domain = LicenseModule::get_site_domain();
$site_normalized = LicenseModule::normalize_domain( $site_domain );
foreach( $manifest as $info ) {
if( empty( $info['signed_for'] ) ) continue;
$signed_normalized = LicenseModule::normalize_domain( $info['signed_for'] );
if( $signed_normalized !== $site_normalized ) {
$this->mark_addon_tampered( $plugin_slug, [
'Domain mismatch: addon signed for ' . $info['signed_for'] . ', running on ' . $site_domain,
], 'domain_mismatch' );
return 'domain_mismatch';
}
}
// 3) Detect extra PHP files not listed in the manifest.
// An attacker could add malicious PHP files that bypass all signature checks
// if we only iterate over manifest keys. Scan the actual directory instead.
$all_php_files = $this->get_php_files_recursive( $plugin_dir );
foreach( $all_php_files as $php_file ) {
$relative = str_replace( $plugin_dir . '/', '', $php_file );
if( ! isset( $manifest[ $relative ] ) ) {
$this->mark_addon_tampered( $plugin_slug, [
'Unauthorized PHP file not in manifest: ' . $relative,
] );
return 'tampered';
}
}
// 4) Verify PHP file headers contain our signature comment
$header_check = $this->verify_php_header_signatures( $plugin_slug, $manifest );
if( $header_check !== 'valid' ) {
return $header_check;
}
// 5) Check for known nulled/patched patterns in PHP files
$patch_check = $this->detect_nulled_patterns( $plugin_slug );
if( $patch_check !== 'valid' ) {
return $patch_check;
}
// All checks passed - clear any previous tamper flags
$this->clear_tamper_flag( $plugin_slug );
return 'valid';
}
/**
* Sanitize a plugin slug to prevent directory traversal.
* Only allows alphanumeric characters, hyphens, and underscores.
*/
public static function sanitize_slug( string $slug ): string {
return preg_replace( '/[^a-zA-Z0-9_-]/', '', $slug );
}
/**
* Detect common nulled/patched plugin patterns:
* - License check bypasses
* - Known nulling tool signatures
* - Suspicious eval/base64 injections
* - Removed or stubbed license verification functions
*/
private function detect_nulled_patterns( string $plugin_slug ): string {
$plugin_slug = self::sanitize_slug( $plugin_slug );
$plugin_dir = WP_PLUGIN_DIR . '/' . $plugin_slug;
if( ! is_dir( $plugin_dir ) ) return 'valid';
$suspicious_patterns = [
'/\b(nulled|cracked|patched|warez|gpl\s*club|gpldl)\b/i',
'/eval\s*\(\s*base64_decode\s*\(/i',
'/eval\s*\(\s*gzinflate\s*\(/i',
'/eval\s*\(\s*str_rot13\s*\(/i',
'/\$GLOBALS\s*\[\s*[\'"][a-z0-9_]{30,}[\'"]\s*\]/i',
'/preg_replace\s*\(\s*[\'"]\/[^\/]*\/e[\'"]/i',
];
$flagged_files = [];
$php_files = $this->get_php_files_recursive( $plugin_dir );
foreach( $php_files as $file ) {
$content = file_get_contents( $file );
if( $content === false ) continue;
foreach( $suspicious_patterns as $pattern ) {
if( preg_match( $pattern, $content, $matches ) ) {
$relative = str_replace( $plugin_dir . '/', '', $file );
$flagged_files[] = $relative . ' (suspicious: ' . trim( $matches[0] ) . ')';
break; // One match per file is enough
}
}
}
if( ! empty( $flagged_files ) ) {
$this->mark_addon_tampered( $plugin_slug, $flagged_files, 'patched' );
return 'patched';
}
return 'valid';
}
/**
* Get all PHP files recursively in a directory
*/
private function get_php_files_recursive( string $dir, int $max_depth = 10 ): array {
$files = [];
$real_dir = realpath( $dir );
if( $real_dir === false ) return $files;
$iterator = new RecursiveIteratorIterator(
new RecursiveDirectoryIterator( $dir, FilesystemIterator::SKIP_DOTS | FilesystemIterator::FOLLOW_SYMLINKS ),
RecursiveIteratorIterator::SELF_FIRST
);
$iterator->setMaxDepth( $max_depth );
foreach( $iterator as $file ) {
if( ! $file->isFile() || $file->getExtension() !== 'php' ) continue;
// Ensure file is actually within the plugin directory (prevent symlink escapes)
$real_path = realpath( $file->getPathname() );
if( $real_path === false || strpos( $real_path, $real_dir ) !== 0 ) continue;
$files[] = $file->getPathname();
}
return $files;
}
/**
* Mark an addon as tampered in the options
*/
private function mark_addon_tampered( string $plugin_slug, array $files, string $reason = 'tampered' ): void {
$tampered = get_option( $this->tampered_option, [] );
// Don't overwrite detected_at if already flagged (preserve grace period start)
if( isset( $tampered[ $plugin_slug ] ) ) {
$tampered[ $plugin_slug ]['files'] = $files;
$tampered[ $plugin_slug ]['reason'] = $reason;
} else {
$tampered[ $plugin_slug ] = [
'files' => $files,
'reason' => $reason,
'detected_at' => current_time( 'mysql' ),
];
}
update_option( $this->tampered_option, $tampered );
}
/**
* Check if an addon has a legacy license from the old gVectors license system.
* Results are cached locally and revalidated daily to avoid repeated API calls.
*
* Returns cached legacy license data or false if no legacy license.
*/
private function check_legacy_license( string $plugin_slug ): array {
$cached = $this->get_cached_legacy_license( $plugin_slug );
if( $cached !== false ) return $cached;
$response = $this->licenseService->apiService->check_legacy_license( $plugin_slug );
if( ! empty( $response['success'] ) && ! empty( $response['data'] ) ) {
$data = $response['data'];
$legacy_data = [
'has_license' => ! empty( $data['has_legacy_license'] ),
'status' => $data['status'] ?? '',
'expired' => ! empty( $data['expired'] ),
'expired_time' => isset( $data['expired_time'] ) ? (int) $data['expired_time'] : 0,
'last_checked' => time(),
];
$this->save_cached_legacy_license( $plugin_slug, $legacy_data );
return $legacy_data;
}
// API call failed — cache a negative result with a shorter TTL (1 hour)
// so we retry sooner, but don't hammer the server on every cron run
$negative = [
'has_license' => false,
'status' => '',
'expired' => false,
'expired_time' => 0,
'last_checked' => time() - $this->config->get_legacy_check_period() + HOUR_IN_SECONDS,
];
$this->save_cached_legacy_license( $plugin_slug, $negative );
return $negative;
}
/**
* Get cached legacy license data for a slug.
* Returns the cached array or false if not cached or stale.
*/
private function get_cached_legacy_license( string $plugin_slug ) {
$all_legacy = get_option( $this->legacy_licenses_option, [] );
if( ! isset( $all_legacy[ $plugin_slug ] ) ) return false;
$cached = $all_legacy[ $plugin_slug ];
$last = isset( $cached['last_checked'] ) ? (int) $cached['last_checked'] : 0;
// Stale if older than LEGACY_CHECK_PERIOD
if( ( time() - $last ) > $this->config->get_legacy_check_period() ) return false;
return $cached;
}
// ==========================================
// Activation Gate
// ==========================================
/**
* Save legacy license check result to the persistent cache.
*/
private function save_cached_legacy_license( string $plugin_slug, array $data ): void {
$all_legacy = get_option( $this->legacy_licenses_option, [] );
$all_legacy[ $plugin_slug ] = $data;
update_option( $this->legacy_licenses_option, $all_legacy );
}
// ==========================================
// Signature & Piracy Verification
// ==========================================
/**
* Clear tamper flag for an addon
*/
private function clear_tamper_flag( string $plugin_slug ): void {
$tampered = get_option( $this->tampered_option, [] );
if( isset( $tampered[ $plugin_slug ] ) ) {
unset( $tampered[ $plugin_slug ] );
update_option( $this->tampered_option, $tampered );
}
// Also clear the seen flag
$seen = get_option( $this->tamper_dismissed_option, [] );
if( isset( $seen[ $plugin_slug ] ) ) {
unset( $seen[ $plugin_slug ] );
update_option( $this->tamper_dismissed_option, $seen );
}
}
/**
* Track legacy-licensed addons that have expired licenses for admin notice.
*/
private function update_legacy_notice( string $plugin_slug, array $legacy_data ): void {
$notices = get_option( $this->legacy_notice_option, [] );
if( ! empty( $legacy_data['expired'] ) ) {
$plugin_file = $this->get_installed_plugin_file( $plugin_slug );
$plugin_name = $plugin_slug;
if( $plugin_file ) {
$plugin_data = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin_file, false, false );
$plugin_name = $plugin_data['Name'] ?? $plugin_slug;
}
$notices[ $plugin_slug ] = [
'plugin_name' => $plugin_name,
'status' => 'expired',
'expired_time' => $legacy_data['expired_time'] ?? 0,
];
} else {
// Active legacy license — remove any notice
unset( $notices[ $plugin_slug ] );
}
update_option( $this->legacy_notice_option, $notices );
}
/**
* Verify that PHP files contain valid embedded signature headers.
* Checks both @addon-signature (HMAC hash) and @addon-domain (base64 site URL).
* Validates the domain hash matches this site and the signature hash matches the manifest.
*/
private function verify_php_header_signatures( string $plugin_slug, array $manifest ): string {
$plugin_dir = WP_PLUGIN_DIR . '/' . $plugin_slug;
$site_domain = LicenseModule::get_site_domain();
$missing_sigs = [];
$invalid_domain = [];
$invalid_hash = [];
foreach( $manifest as $relative_path => $info ) {
if( strpos( $relative_path, '..' ) !== false || strpos( $relative_path, '/' ) === 0 ) continue;
$file_path = $plugin_dir . '/' . $relative_path;
if( ! file_exists( $file_path ) ) continue;
if( pathinfo( $file_path, PATHINFO_EXTENSION ) !== 'php' ) continue;
$header = file_get_contents( $file_path, false, null, 0, 4096 );
if( $header === false ) continue;
// Extract @addon-signature hash
if( ! preg_match( '/\/\*\s*@addon-signature\s+([a-f0-9]{64})\s*\*\//', $header, $sig_match ) ) {
$missing_sigs[] = $relative_path . ' (missing @addon-signature header)';
continue;
}
// Extract @addon-domain base64-encoded site URL
if( ! preg_match( '/\/\*\s*@addon-domain\s+([A-Za-z0-9+\/=]+)\s*\*\//', $header, $domain_match ) ) {
$missing_sigs[] = $relative_path . ' (missing @addon-domain header)';
continue;
}
// Validate domain matched this site
$signed_domain = base64_decode( $domain_match[1] );
if( $signed_domain === false ) {
$invalid_domain[] = $relative_path . ' (corrupted domain encoding)';
continue;
}
if( LicenseModule::normalize_domain( $signed_domain ) !== LicenseModule::normalize_domain( $site_domain ) ) {
$invalid_domain[] = $relative_path . ' (domain: ' . $signed_domain . ' vs ' . $site_domain . ')';
continue;
}
// Validate signature hash matches the one stored in manifest
if( ! empty( $info['signature'] ) && $sig_match[1] !== $info['signature'] ) {
$invalid_hash[] = $relative_path . ' (signature hash mismatch)';
}
}
if( ! empty( $missing_sigs ) ) {
$this->mark_addon_tampered( $plugin_slug, $missing_sigs, 'no_signatures' );
return 'no_signatures';
}
if( ! empty( $invalid_domain ) ) {
$this->mark_addon_tampered( $plugin_slug, $invalid_domain, 'domain_mismatch' );
return 'domain_mismatch';
}
if( ! empty( $invalid_hash ) ) {
$this->mark_addon_tampered( $plugin_slug, $invalid_hash );
return 'tampered';
}
return 'valid';
}
/**
* Activate an installed addon
*/
public function activate( string $plugin_file ): array {
if( ! current_user_can( 'activate_plugins' ) ) {
return [ 'success' => false, 'error' => __( 'Permission denied', 'gvectors' ) ];
}
$result = activate_plugin( $plugin_file );
if( is_wp_error( $result ) ) {
return [ 'success' => false, 'error' => $result->get_error_message() ];
}
return [ 'success' => true, 'message' => __( 'Addon activated successfully', 'gvectors' ) ];
}
/**
* Deactivate an addon
*/
public function deactivate_addon( string $plugin_file ): array {
if( ! current_user_can( 'activate_plugins' ) ) {
return [ 'success' => false, 'error' => __( 'Permission denied', 'gvectors' ) ];
}
deactivate_plugins( $plugin_file );
return [ 'success' => true, 'message' => __( 'Addon deactivated successfully', 'gvectors' ) ];
}
// ==========================================
// Legacy License Checking (old gVectors system)
// ==========================================
public function check_for_updates( $transient ) {
if( empty( $transient->checked ) ) return $transient;
$licenses = $this->licenseService->get_all();
// Clear cached addon data only once per request, so we fetch fresh version info without DDOSing the server
if( ! $this->update_check_done ) {
delete_transient( $this->all_addons_transient_name );
$this->update_check_done = true;
}
// Fetch all addon info from proxy server (version, requires, tested, etc.)
$proxy_addons = $this->get_proxy_addons_map();
if( empty( $proxy_addons ) ) return $transient;
$site_domain = LicenseModule::get_site_domain();
// Track which plugin files already got a licensed update (so we don't override with unlicensed)
$licensed_plugin_files = [];
if( ! empty( $licenses ) ) {
foreach( $licenses as $product_id => $license ) {
if( empty( $license['license_key'] ) ) continue;
// Only active/trial licenses get updates - expired licenses do NOT
if( ! in_array( $license['status'], [ 'active', 'trial' ], true ) ) continue;
// Verify license is activated for this specific domain
if( ! empty( $site_domain ) ) {
$activated_site = $license['site_domain'] ?? '';
if( ! empty( $activated_site ) && LicenseModule::normalize_domain( $activated_site ) !== LicenseModule::normalize_domain( $site_domain ) ) {
continue;
}
}
// Check expiry date - do not offer updates for expired licenses
$expires_ts = ! empty( $license['expires_at'] ) ? strtotime( $license['expires_at'] ) : false;
if( $expires_ts !== false && $expires_ts < time() ) {
continue;
}
$plugin_slug = $license['plugin_slug'] ?? '';
if( empty( $plugin_slug ) ) continue;
$plugin_file = $this->get_installed_plugin_file( $plugin_slug );
if( ! $plugin_file ) continue;
$current_version = $transient->checked[ $plugin_file ] ?? '0.0.0';
// Use proxy server version (from addon file header) instead of local options
$proxy_info = $proxy_addons[ $plugin_slug ] ?? [];
$latest_version = ! empty( $proxy_info['version'] ) ? $proxy_info['version'] : '';
if( $latest_version && version_compare( $latest_version, $current_version, '>' ) ) {
$update = new stdClass();
$update->slug = $plugin_slug;
$update->plugin = $plugin_file;
$update->new_version = $latest_version;
$update->url = ! empty( $proxy_info['plugin_uri'] ) ? $proxy_info['plugin_uri'] : '';
// Set package to the proxy server's wp-download endpoint
// The proxy validates the license and 302 redirects to a temporary download URL
$update->package = add_query_arg( [
'product_id' => $product_id,
'license_key' => $license['license_key'],
'site_domain' => LicenseModule::get_site_domain(),
'site_token' => LicenseModule::get_site_token(),
],
trailingslashit(
$this->config->get_proxy_server_url()
) . 'addon/wp-download' );
$update->icons = ! empty( $proxy_info['logo'] ) ? [ '1x' => $proxy_info['logo'], '2x' => $proxy_info['logo'] ] : [];
$update->banners = [];
$update->tested = ! empty( $proxy_info['tested'] ) ? $proxy_info['tested'] : '';
$update->requires = ! empty( $proxy_info['requires'] ) ? $proxy_info['requires'] : '';
$update->requires_php = ! empty( $proxy_info['requires_php'] ) ? $proxy_info['requires_php'] : '';
$transient->response[ $plugin_file ] = $update;
$licensed_plugin_files[] = $plugin_file;
}
}
}
// Also check installed addons with an active (non-expired) legacy license.
// These users purchased before the new Paddle system and still deserve updates.
$all_legacy = get_option( $this->legacy_licenses_option, [] );
if( ! empty( $all_legacy ) ) {
foreach( $all_legacy as $plugin_slug => $legacy ) {
// Only active, non-expired legacy licenses get updates
if( empty( $legacy['has_license'] ) || ! empty( $legacy['expired'] ) ) continue;
$plugin_file = $this->get_installed_plugin_file( $plugin_slug );
if( ! $plugin_file ) continue;
// Skip if already handled by a new Paddle license above
if( in_array( $plugin_file, $licensed_plugin_files, true ) ) continue;
// Only process known gVectors addons from the proxy
if( ! isset( $proxy_addons[ $plugin_slug ] ) ) continue;
// Migrate legacy license to new system eagerly — even without a pending update.
// On success, save() stores the license in gvectors_licenses so the Paddle loop
// handles this slug on the next check_for_updates() call.
$migrated = $this->maybe_migrate_legacy_license( $plugin_slug );
$proxy_info = $proxy_addons[ $plugin_slug ];
$latest_version = ! empty( $proxy_info['version'] ) ? $proxy_info['version'] : '';
$current_version = $transient->checked[ $plugin_file ] ?? '0.0.0';
if( $latest_version && version_compare( $latest_version, $current_version, '>' ) ) {
$update = new stdClass();
$update->slug = $plugin_slug;
$update->plugin = $plugin_file;
$update->new_version = $latest_version;
$update->url = ! empty( $proxy_info['plugin_uri'] ) ? $proxy_info['plugin_uri'] : '';
if( $migrated && ! empty( $migrated['license_key'] ) ) {
$update->package = add_query_arg( [
'product_id' => $migrated['product_id'],
'license_key' => $migrated['license_key'],
'site_domain' => LicenseModule::get_site_domain(),
'site_token' => LicenseModule::get_site_token(),
],
trailingslashit(
$this->config->get_proxy_server_url()
) . 'addon/wp-download' );
} else {
$update->package = add_query_arg( [
'plugin_slug' => $plugin_slug,
'site_domain' => LicenseModule::get_site_domain(),
'site_token' => LicenseModule::get_site_token(),
], trailingslashit( $this->config->get_proxy_server_url() ) . 'addon/legacy-wp-download' );
}
$update->icons = ! empty( $proxy_info['logo'] ) ? [ '1x' => $proxy_info['logo'], '2x' => $proxy_info['logo'] ] : [];
$update->banners = [];
$update->tested = ! empty( $proxy_info['tested'] ) ? $proxy_info['tested'] : '';
$update->requires = ! empty( $proxy_info['requires'] ) ? $proxy_info['requires'] : '';
$update->requires_php = ! empty( $proxy_info['requires_php'] ) ? $proxy_info['requires_php'] : '';
$transient->response[ $plugin_file ] = $update;
$licensed_plugin_files[] = $plugin_file;
}
}
}
// Also check installed addons that have a new version but NO active license
// Show them as available updates but with empty package (download blocked)
if( ! function_exists( 'get_plugins' ) ) {
require_once ABSPATH . 'wp-admin/includes/plugin.php';
}
$all_plugins = get_plugins();
// Batch-check legacy license status for any installed gVectors addon slugs
// that are not yet in the local cache (e.g. first run before cron has executed).
// This prevents showing "Automatic update is unavailable" for legitimate legacy users.
$uncached_slugs = [];
foreach( $all_plugins as $_pf => $_pd ) {
if( in_array( $_pf, $licensed_plugin_files, true ) ) continue;
$_slug = dirname( $_pf );
if( $_slug === '.' || $_slug === $this->config->get_core_plugin_slug() ) continue;
if( ! isset( $proxy_addons[ $_slug ] ) ) continue;
if( ! isset( $all_legacy[ $_slug ] ) ) $uncached_slugs[] = $_slug;
}
if( ! empty( $uncached_slugs ) ) {
$this->check_legacy_licenses_batch( array_unique( $uncached_slugs ) );
$all_legacy = get_option( $this->legacy_licenses_option, [] );
// Apply legacy download URLs for newly-discovered active licenses
foreach( $uncached_slugs as $_slug ) {
$_legacy = $all_legacy[ $_slug ] ?? [];
if( empty( $_legacy['has_license'] ) || ! empty( $_legacy['expired'] ) ) continue;
$_plugin_file = $this->get_installed_plugin_file( $_slug );
if( ! $_plugin_file || in_array( $_plugin_file, $licensed_plugin_files, true ) ) continue;
if( ! isset( $proxy_addons[ $_slug ] ) ) continue;
// Migrate eagerly — even without a pending update
$_migrated = $this->maybe_migrate_legacy_license( $_slug );
$_proxy = $proxy_addons[ $_slug ];
$_latest = $_proxy['version'] ?? '';
$_current = $transient->checked[ $_plugin_file ] ?? '0.0.0';
if( ! $_latest || ! version_compare( $_latest, $_current, '>' ) ) continue;
$_update = new stdClass();
$_update->slug = $_slug;
$_update->plugin = $_plugin_file;
$_update->new_version = $_latest;
$_update->url = $_proxy['plugin_uri'] ?? '';
if( $_migrated && ! empty( $_migrated['license_key'] ) ) {
$_update->package = add_query_arg( [
'product_id' => $_migrated['product_id'],
'license_key' => $_migrated['license_key'],
'site_domain' => LicenseModule::get_site_domain(),
'site_token' => LicenseModule::get_site_token(),
],
trailingslashit(
$this->config->get_proxy_server_url()
) . 'addon/wp-download' );
} else {
$_update->package = add_query_arg( [
'plugin_slug' => $_slug,
'site_domain' => LicenseModule::get_site_domain(),
'site_token' => LicenseModule::get_site_token(),
], trailingslashit( $this->config->get_proxy_server_url() ) . 'addon/legacy-wp-download' );
}
$_update->icons = ! empty( $_proxy['logo'] ) ? [ '1x' => $_proxy['logo'], '2x' => $_proxy['logo'] ] : [];
$_update->banners = [];
$_update->tested = $_proxy['tested'] ?? '';
$_update->requires = $_proxy['requires'] ?? '';
$_update->requires_php = $_proxy['requires_php'] ?? '';
$transient->response[ $_plugin_file ] = $_update;
$licensed_plugin_files[] = $_plugin_file;
}
}
foreach( $all_plugins as $plugin_file => $plugin_data ) {
// Skip if already handled by licensed update above
if( in_array( $plugin_file, $licensed_plugin_files, true ) ) continue;
$slug = dirname( $plugin_file );
if( $slug === '.' || $slug === $this->config->get_core_plugin_slug() ) continue;
// Only process known gVectors addons from the proxy
if( ! isset( $proxy_addons[ $slug ] ) ) continue;
$proxy_info = $proxy_addons[ $slug ];
$latest_version = ! empty( $proxy_info['version'] ) ? $proxy_info['version'] : '';
$current_version = $transient->checked[ $plugin_file ] ?? '0.0.0';
if( $latest_version && version_compare( $latest_version, $current_version, '>' ) ) {
$update = new stdClass();
$update->slug = $slug;
$update->plugin = $plugin_file;
$update->new_version = $latest_version;
$update->url = ! empty( $proxy_info['plugin_uri'] ) ? $proxy_info['plugin_uri'] : '';
$update->package = ''; // Empty package — download blocked without active license
$update->icons = ! empty( $proxy_info['logo'] ) ? [ '1x' => $proxy_info['logo'], '2x' => $proxy_info['logo'] ] : [];
$update->banners = [];
$update->tested = ! empty( $proxy_info['tested'] ) ? $proxy_info['tested'] : '';
$update->requires = ! empty( $proxy_info['requires'] ) ? $proxy_info['requires'] : '';
$update->requires_php = ! empty( $proxy_info['requires_php'] ) ? $proxy_info['requires_php'] : '';
$transient->response[ $plugin_file ] = $update;
}
}
return $transient;
}
/**
* Attempt to migrate an active legacy gVectors license to the new Paddle license system.
*
* Calls addon/activate-legacy-license on the proxy server, which creates a row in the
* new licenses table using the original activation key. On success the returned data
* is stored in gvectors_licenses, so from this point forward:
* - validate / batch-validate resolve the license from the new table
* - check_for_updates() builds an addon/wp-download package URL (not legacy-wp-download)
* - downloaded files arrive with a manifest + signed PHP headers
* - the addon never re-enters the legacy scan scope (it's in $licensed_slugs)
*
* The call is idempotent — running it multiple times is safe.
* Rate-limited: won't retry for 6 hours after a failure to avoid API spam.
*
* @return array|null [ 'product_id' => ..., 'license_key' => ... ] on success, null on failure
*/
private function maybe_migrate_legacy_license( string $plugin_slug ): ?array {
// Rate limit: don't retry within 6 hours after a failure
$attempt_key = 'gvectors_lgc_mig_' . md5( $plugin_slug );
if( get_transient( $attempt_key ) ) return null;
$response = $this->licenseService->apiService->activate_legacy_license( $plugin_slug );
if( ! empty( $response['success'] ) && ! empty( $response['data'] ) ) {
$data = $response['data'];
$product_id = $data['product_id'] ?? '';
if( ! empty( $product_id ) && ! empty( $data['license_key'] ) ) {
$this->licenseService->save( $product_id, $data );
// Remove slug from legacy caches — it's now a first-class new-system license
$all_legacy = get_option( $this->legacy_licenses_option, [] );
if( isset( $all_legacy[ $plugin_slug ] ) ) {
unset( $all_legacy[ $plugin_slug ] );
update_option( $this->legacy_licenses_option, $all_legacy );
}
$notices = get_option( $this->legacy_notice_option, [] );
if( isset( $notices[ $plugin_slug ] ) ) {
unset( $notices[ $plugin_slug ] );
update_option( $this->legacy_notice_option, $notices );
}
return [
'product_id' => $product_id,
'license_key' => $data['license_key'],
];
}
}
// Cache failure to prevent repeated attempts on every page load
set_transient( $attempt_key, 1, 6 * HOUR_IN_SECONDS );
return null;
}
/**
* Batch-check legacy licenses for multiple addon slugs.
* Populates the local cache for all slugs in one API call.
*/
private function check_legacy_licenses_batch( array $plugin_slugs ): void {
if( empty( $plugin_slugs ) ) return;
$response = $this->licenseService->apiService->check_legacy_licenses_batch( $plugin_slugs );
if( ! empty( $response['success'] ) && ! empty( $response['data']['addons'] ) ) {
$all_legacy = get_option( $this->legacy_licenses_option, [] );
foreach( $response['data']['addons'] as $slug => $data ) {
$all_legacy[ $slug ] = [
'has_license' => ! empty( $data['has_legacy_license'] ),
'status' => $data['status'] ?? '',
'expired' => ! empty( $data['expired'] ),
'expired_time' => isset( $data['expired_time'] ) ? (int) $data['expired_time'] : 0,
'last_checked' => time(),
];
}
// Also cache negative results for slugs not returned by the server
foreach( $plugin_slugs as $slug ) {
if( ! isset( $all_legacy[ $slug ] ) || $all_legacy[ $slug ]['last_checked'] < time() - 60 ) {
$all_legacy[ $slug ] = [
'has_license' => false,
'status' => '',
'expired' => false,
'expired_time' => 0,
'last_checked' => time(),
];
}
}
update_option( $this->legacy_licenses_option, $all_legacy );
}
}
/**
* Intercept WordPress updater package downloads to block tampered addons with a visible error.
* This hooks into 'upgrader_pre_download' so the user sees a clear message in the update UI.
* The actual download is handled by the proxy server's addon/wp-download endpoint (302 redirect).
*/
public function block_tampered_update_download( $reply, $package ) {
if( is_wp_error( $reply ) || ! is_string( $package ) ) return $reply;
// Intercept our own addon download URLs (both regular and legacy-wp-download endpoints)
$is_regular = strpos( $package, 'addon/wp-download' ) !== false;
$is_legacy = strpos( $package, 'addon/legacy-wp-download' ) !== false;
if( ! $is_regular && ! $is_legacy ) return $reply;
$parsed = [];
parse_str( wp_parse_url( $package, PHP_URL_QUERY ) ?: '', $parsed );
if( $is_legacy ) {
// Legacy download — plugin_slug is a direct query param
$plugin_slug = self::sanitize_slug( $parsed['plugin_slug'] ?? '' );
} else {
// Regular download — resolve plugin_slug via product_id
$product_id = $parsed['product_id'] ?? '';
if( empty( $product_id ) ) return $reply;
$license = $this->licenseService->get( $product_id );
$plugin_slug = $license['plugin_slug'] ?? '';
}
if( $plugin_slug && $this->is_addon_tampered( $plugin_slug ) ) {
return new WP_Error(
'tampered_addon',
__(
'This addon cannot be updated because its files have been modified or are not original. To resolve this, please: 1) Go to Plugins and deactivate, then delete this addon. 2) Visit the gVectors Store Addons page and make sure your license is active. 3) Re-install the addon from the gVectors Store Addons page. Once re-installed, everything will work normally again.',
'gvectors'
)
);
}
return $reply;
}
/**
* Get addon status: 'not_installed', 'installed', 'active'
*/
public function get_status( string $plugin_slug ): string {
if( ! $this->is_installed( $plugin_slug ) ) return 'not_installed';
if( $this->is_active( $plugin_slug ) ) return 'active';
return 'installed';
}
/**
* Check if an addon is installed
*/
public function is_installed( string $plugin_slug ): bool {
return ! empty( $this->get_installed_plugin_file( $plugin_slug ) );
}
/**
* Check if an addon is active
*/
public function is_active( string $plugin_slug ): bool {
$file = $this->get_installed_plugin_file( $plugin_slug );
if( empty( $file ) ) return false;
return is_plugin_active( $file );
}
/**
* Intercept plugin activation. If the plugin is a known gVectors addon,
* run full validity checks (license, signatures, domain, nulled patterns).
* Block activation with wp_die() if any check fails.
*/
public function validate_on_activation( string $plugin_file ): void {
$slug = dirname( $plugin_file );
if( $slug === '.' || $slug === $this->config->get_core_plugin_slug() ) return;
// Skip all checks on development/local/staging environments
if( LicenseModule::is_development_site() ) return;
// Check if this is a known gVectors addon
$all_addon_slugs = $this->get_all_addon_slugs_from_proxy();
if( ! $this->is_known_addon( $slug, $all_addon_slugs ) ) return;
$reasons = [];
// 1) License check — new Paddle license OR legacy gVectors license
$has_new_license = $this->addon_has_license( $slug );
$has_legacy_license = false;
if( ! $has_new_license ) {
$has_legacy_license = $this->has_legacy_license( $slug );
}
if( ! $has_new_license && ! $has_legacy_license ) {
$reasons[] = __( 'No valid license found for this addon on this site.', 'gvectors' );
}
// 2) Signature & integrity checks
$sig_result = $this->verify_addon_signatures( $slug );
if( $sig_result !== 'valid' && $sig_result !== 'legacy_valid' ) {
$labels = [
'no_manifest' => __( 'Missing signature manifest — addon was not installed through the official channel.', 'gvectors' ),
'tampered' => __( 'File integrity check failed — one or more addon files have been modified.', 'gvectors' ),
'domain_mismatch' => __( 'Domain mismatch — this addon copy is signed for a different website.', 'gvectors' ),
'no_signatures' => __( 'Missing PHP header signatures — addon files lack required security headers.', 'gvectors' ),
'patched' => __( 'Nulled/patched code detected — this addon appears to be a pirated copy.', 'gvectors' ),
];
$reasons[] = $labels[ $sig_result ] ?? __( 'Addon verification failed.', 'gvectors' );
}
if( ! empty( $reasons ) ) {
// Store a transient so we can show an admin notice on redirect back
set_transient( 'gvectors_activation_blocked_' . $slug, $reasons, 60 );
wp_die(
'' . esc_html__( 'gVectors Addon Activation Blocked', 'gvectors' ) . '
'
. '' . esc_html( $slug ) . '
'
. '- ' . implode( '
- ', array_map( 'esc_html', $reasons ) ) . '
'
. '' . esc_html__( 'Please install a valid licensed copy from the gVectors Store Addons dashboard.', 'gvectors' ) . '
',
esc_html__( 'Activation Blocked', 'gvectors' ),
[ 'back_link' => true ]
);
}
}
/**
* Fetch all known addon slugs from the proxy server.
* Returns array of slug strings.
*/
private function get_all_addon_slugs_from_proxy(): array {
$response = $this->licenseService->apiService->get_all_addons();
if( empty( $response['success'] ) || empty( $response['data']['addons'] ) ) {
return [];
}
return array_column( $response['data']['addons'], 'slug' );
}
/**
* Check if a plugin slug is a known gVectors addon by querying the proxy's full addon list.
*/
private function is_known_addon( string $plugin_slug, array $all_addon_slugs = [] ): bool {
if( ! empty( $all_addon_slugs ) ) {
return in_array( $plugin_slug, $all_addon_slugs, true );
}
// Fallback: check by naming convention
return ( strpos( $plugin_slug, $this->config->get_core_plugin_slug() . '-' ) === 0 || strpos( $plugin_slug, $this->config->get_core_plugin_slug() . '_' ) === 0 );
}
/**
* Check if an addon slug has an associated license (local) or is a known addon from proxy.
*/
private function addon_has_license( string $plugin_slug ): bool {
$licenses = $this->licenseService->get_all();
foreach( $licenses as $license ) {
if( isset( $license['plugin_slug'] ) && $license['plugin_slug'] === $plugin_slug ) {
return true;
}
}
return false;
}
/**
* Quick check: does this addon have a legacy license (from cache)?
* Returns true if the cached legacy license exists and is valid.
*/
private function has_legacy_license( string $plugin_slug ): bool {
$legacy = $this->check_legacy_license( $plugin_slug );
return ! empty( $legacy['has_license'] );
}
/**
* Verify all installed addons — uses the proxy's full addon list (not just local licenses).
* Checks every installed plugin that matches a known addon slug from the proxy.
* Uses a grace period: show FATAL notice first, deactivate after TAMPER_GRACE_DAYS.
*/
public function verify_all_addon_signatures(): void {
// Skip all checks on development/local/staging environments
if( LicenseModule::is_development_site() ) return;
// Get the full list of known addon slugs from the proxy server
$all_addon_slugs = $this->get_all_addon_slugs_from_proxy();
// Collect locally licensed plugin slugs
$licenses = $this->licenseService->get_all();
$licensed_slugs = [];
foreach( $licenses as $product_id => $license ) {
$slug = $license['plugin_slug'] ?? '';
if( ! empty( $slug ) ) $licensed_slugs[] = $slug;
}
// Scan for installed addons that are known to the proxy but have no license
$this->scan_unlicensed_addons( $licensed_slugs, $all_addon_slugs );
// Verify signatures for all installed plugins that match known addon slugs
if( ! function_exists( 'get_plugins' ) ) {
require_once ABSPATH . 'wp-admin/includes/plugin.php';
}
$all_plugins = get_plugins();
foreach( $all_plugins as $file => $data ) {
$slug = dirname( $file );
if( $slug === '.' || $slug === $this->config->get_core_plugin_slug() ) continue;
// Check against proxy's known addon list
if( ! $this->is_known_addon( $slug, $all_addon_slugs ) ) continue;
if( ! $this->is_installed( $slug ) ) continue;
$result = $this->verify_addon_signatures( $slug );
if( $result !== 'valid' && $result !== 'legacy_valid' ) {
$this->maybe_deactivate_tampered( $slug );
}
}
}
/**
* Scan for installed plugins that are known gVectors addons (from the proxy list) but have no license.
* These could be pirated copies installed manually, OR legacy-licensed installations.
* Checks legacy license before flagging as tampered.
*/
private function scan_unlicensed_addons( array $licensed_slugs, array $all_addon_slugs = [] ): void {
if( ! function_exists( 'get_plugins' ) ) {
require_once ABSPATH . 'wp-admin/includes/plugin.php';
}
$all_plugins = get_plugins();
// Two buckets for unlicensed known addons:
// - $needs_legacy_check: no manifest → must verify legacy license or flag as tampered
// - $needs_legacy_refresh: has manifest (updated via legacy-wp-download) → refresh legacy
// cache so check_for_updates() keeps offering update packages; no tamper action here
// since verify_all_addon_signatures() handles file integrity for manifest-having addons.
$needs_legacy_check = [];
$needs_legacy_refresh = [];
foreach( $all_plugins as $file => $data ) {
$slug = dirname( $file );
if( $slug === '.' || $slug === $this->config->get_core_plugin_slug() ) continue;
if( ! $this->is_known_addon( $slug, $all_addon_slugs ) ) continue;
if( in_array( $slug, $licensed_slugs, true ) ) continue;
if( ! is_plugin_active( $file ) ) continue;
$manifest_file = WP_PLUGIN_DIR . '/' . $slug . '/.addon-signatures.json';
if( ! file_exists( $manifest_file ) ) {
$needs_legacy_check[] = $slug;
} else {
$needs_legacy_refresh[] = $slug;
}
}
// Batch-check legacy licenses for all unlicensed addons in a single API call
$all_to_check = array_values( array_unique( array_merge( $needs_legacy_check, $needs_legacy_refresh ) ) );
if( ! empty( $all_to_check ) ) {
$this->check_legacy_licenses_batch( $all_to_check );
}
// No-manifest addons: apply tamper/clear logic based on legacy license presence
foreach( $needs_legacy_check as $slug ) {
$legacy = $this->get_cached_legacy_license( $slug );
if( $legacy !== false && ! empty( $legacy['has_license'] ) ) {
// Legacy licensed — not piracy. Track for admin notice if expired.
$this->clear_tamper_flag( $slug );
$this->update_legacy_notice( $slug, $legacy );
// Proactively migrate active legacy licenses to the new system.
// Once migrated, the slug enters $licensed_slugs and exits this scan
// scope permanently — future updates go through addon/wp-download.
if( empty( $legacy['expired'] ) ) {
$this->maybe_migrate_legacy_license( $slug );
}
continue;
}
// No legacy license — suspicious, flag as tampered
$this->mark_addon_tampered( $slug, [
'Active gVectors addon without a valid license or signature manifest',
], 'no_manifest' );
$this->maybe_deactivate_tampered( $slug );
}
// Manifest-having addons: only refresh legacy notice so update offers stay active.
// Tamper/integrity decisions are handled by verify_all_addon_signatures() above.
foreach( $needs_legacy_refresh as $slug ) {
$legacy = $this->get_cached_legacy_license( $slug );
if( $legacy !== false && ! empty( $legacy['has_license'] ) ) {
$this->update_legacy_notice( $slug, $legacy );
}
}
}
/**
* Decide whether to deactivate a tampered addon based on the grace period.
* Grace period: show FATAL notice for TAMPER_GRACE_DAYS days.
* After the grace period AND admin has viewed the notice, deactivate.
*/
private function maybe_deactivate_tampered( string $plugin_slug ): void {
$tampered = get_option( $this->tampered_option, [] );
if( ! isset( $tampered[ $plugin_slug ] ) ) return;
$info = $tampered[ $plugin_slug ];
$detected_at = isset( $info['detected_at'] ) ? strtotime( $info['detected_at'] ) : false;
if( $detected_at === false || $detected_at <= 0 ) {
// Invalid timestamp — reset now so grace period starts fresh
$tampered[ $plugin_slug ]['detected_at'] = current_time( 'mysql' );
update_option( $this->tampered_option, $tampered );
return;
}
$days_since = ( time() - $detected_at ) / DAY_IN_SECONDS;
// Check if admin has seen the notice
$seen = get_option( $this->tamper_dismissed_option, [] );
$admin_has_seen = ! empty( $seen[ $plugin_slug ] );
// Deactivate after grace period if admin has viewed the notice
if( $days_since >= $this->config->get_tamper_grace_days() && $admin_has_seen ) {
$plugin_file = $this->get_installed_plugin_file( $plugin_slug );
if( $plugin_file && is_plugin_active( $plugin_file ) ) {
deactivate_plugins( $plugin_file );
// Update tamper record to note deactivation
$tampered[ $plugin_slug ]['deactivated_at'] = current_time( 'mysql' );
update_option( $this->tampered_option, $tampered );
}
}
}
// ==========================================
// Tamper Flags
// ==========================================
/**
* Track when an admin views tamper notices (called on admin_init).
* Records the first time admin sees each tamper notice.
*/
public function track_tamper_notice_view(): void {
if( ! current_user_can( 'administrator' ) ) return;
$tampered = get_option( $this->tampered_option, [] );
if( empty( $tampered ) ) return;
$seen = get_option( $this->tamper_dismissed_option, [] );
$updated = false;
foreach( $tampered as $slug => $info ) {
if( ! isset( $seen[ $slug ] ) ) {
$seen[ $slug ] = current_time( 'mysql' );
$updated = true;
}
}
if( $updated ) {
update_option( $this->tamper_dismissed_option, $seen );
}
}
/**
* Force-delete the update_plugins transient once per 12-hour cycle.
*
* This ensures check_for_updates() runs on the next transient access, which:
* - Discovers legacy licenses (populates LEGACY_LICENSES_OPTION)
* - Triggers migration (maybe_migrate_legacy_license)
* - Builds correct download URLs for all addons
*
* Without this, the transient may contain stale package URLs (from before
* migration) that cause "Download failed. Forbidden" on the first update attempt.
*
* Cost: one extra wp_update_plugins() call per 12h — same as the normal WP refresh interval.
* Skips AJAX requests to avoid interfering with in-progress update downloads.
*/
public function maybe_refresh_update_transient(): void {
if( wp_doing_ajax() ) return;
$flag = $this->config->get_core_plugin_slug() . '_gvectors_update_transient_refreshed';
if( get_transient( $flag ) ) return;
delete_site_transient( 'update_plugins' );
set_transient( $flag, 1, 12 * HOUR_IN_SECONDS );
}
/**
* When a plugin is deleted, clear its tamper flag if it had one.
*/
public function on_plugin_deleted( string $plugin_file, bool $deleted ): void {
if( ! $deleted ) return;
$slug = dirname( $plugin_file );
if( $slug && $slug !== '.' ) {
$this->clear_tamper_flag( $slug );
$this->clear_legacy_cache( $slug );
}
}
/**
* Clear the legacy license cache for a specific addon.
*/
private function clear_legacy_cache( string $plugin_slug ): void {
$all_legacy = get_option( $this->legacy_licenses_option, [] );
if( isset( $all_legacy[ $plugin_slug ] ) ) {
unset( $all_legacy[ $plugin_slug ] );
update_option( $this->legacy_licenses_option, $all_legacy );
}
$notices = get_option( $this->legacy_notice_option, [] );
if( isset( $notices[ $plugin_slug ] ) ) {
unset( $notices[ $plugin_slug ] );
update_option( $this->legacy_notice_option, $notices );
}
}
// ==========================================
// License Validity Check
// ==========================================
/**
* Periodically check all license validity (called by daily cron).
* Marks expired licenses for admin notice display.
* Does NOT deactivate addons for expired licenses - they keep working.
*/
public function check_all_license_validity(): void {
$licenses = $this->licenseService->get_all();
if( empty( $licenses ) ) return;
$expired_notices = get_option( $this->expired_notice_option, [] );
foreach( $licenses as $license ) {
$plugin_slug = $license['plugin_slug'] ?? '';
if( empty( $plugin_slug ) ) continue;
if( ! $this->is_installed( $plugin_slug ) ) continue;
$status = $license['status'] ?? '';
$expires_at = $license['expires_at'] ?? '';
$is_expired = false;
// Check if status is expired/canceled
if( in_array( $status, [ 'expired', 'cancelled' ], true ) ) {
$is_expired = true;
}
// Check if expiry date has passed
$expires_ts = ! empty( $expires_at ) ? strtotime( $expires_at ) : false;
if( $expires_ts !== false && $expires_ts < time() ) {
$is_expired = true;
}
if( $is_expired ) {
$latest_version = $license['latest_version'] ?? '';
$plugin_file = $this->get_installed_plugin_file( $plugin_slug );
$current_version = '';
if( $plugin_file ) {
$plugin_data = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin_file, false, false );
$current_version = $plugin_data['Version'] ?? '';
}
$has_update = $latest_version && $current_version && version_compare( $latest_version, $current_version, '>' );
$expired_notices[ $plugin_slug ] = [
'product_name' => $license['product_name'] ?? $plugin_slug,
'status' => $status,
'expires_at' => $expires_at,
'has_update' => $has_update,
'latest_version' => $latest_version,
'current_version' => $current_version,
];
} else {
// License is valid - remove any expired notice
unset( $expired_notices[ $plugin_slug ] );
}
}
update_option( $this->expired_notice_option, $expired_notices );
}
// ==========================================
// Admin Notices
// ==========================================
/**
* Check if the current admin page should display addon notices.
* Allowed pages: plugin's own admin pages, Dashboard Home, Updates, Installed Plugins, Add Plugins.
*/
private function is_notice_page(): bool {
if( ! is_admin() ) return false;
$screen = function_exists( 'get_current_screen' ) ? get_current_screen() : null;
if( $screen ) {
// Dashboard Home, Updates, Plugins, Add Plugins
if( in_array( $screen->id, [ 'dashboard', 'update-core', 'plugins', 'plugin-install' ], true ) ) {
return true;
}
// Any page belonging to this plugin (screen id contains the plugin slug)
if( strpos( $screen->id, $this->config->get_core_plugin_slug() ) !== false ) {
return true;
}
}
return false;
}
/**
* Handle dismissal of dev environment admin notices via a nonce-secured GET parameter.
* Saves a transient so the notice is suppressed for a set period.
*/
public function handle_dev_notice_dismiss(): void {
if( ! current_user_can( 'administrator' ) ) return;
if( ! empty( $_GET['gvectors_dismiss_dev_env'] ) ) {
check_admin_referer( 'gvectors_dismiss_dev_env' );
set_transient( self::$shared_dev_env_transient, 1, 7 * DAY_IN_SECONDS );
wp_safe_redirect( remove_query_arg( [ 'gvectors_dismiss_dev_env', '_wpnonce' ] ) );
exit;
}
if( ! empty( $_GET['gvectors_dismiss_dev_licenses'] ) ) {
check_admin_referer( 'gvectors_dismiss_dev_licenses' );
set_transient( self::$shared_dev_licenses_transient, 1, DAY_IN_SECONDS );
wp_safe_redirect( remove_query_arg( [ 'gvectors_dismiss_dev_licenses', '_wpnonce' ] ) );
exit;
}
if( ! empty( $_GET['gvectors_dismiss_addon_notice'] ) && ! empty( $_GET['gvectors_notice_slug'] ) ) {
$type = sanitize_key( $_GET['gvectors_dismiss_addon_notice'] );
$slug = sanitize_key( $_GET['gvectors_notice_slug'] );
if( in_array( $type, [ 'tampered', 'expired', 'legacy' ], true ) ) {
check_admin_referer( 'gvectors_dismiss_' . $type . '_' . $slug );
set_transient( 'gvectors_' . $type . '_dismissed_' . $slug, 1, 5 * DAY_IN_SECONDS );
wp_safe_redirect( remove_query_arg( [ 'gvectors_dismiss_addon_notice', 'gvectors_notice_slug', '_wpnonce' ] ) );
exit;
}
}
}
/**
* Warn administrators that the site is running in a development/staging environment.
* All local addon validation and tamper checks are bypassed in this state.
* Dismissible for 7 days; reappears automatically as a periodic reminder.
*/
public function dev_environment_notice(): void {
if( ! $this->is_notice_page() ) return;
if( self::$dev_env_notice_shown ) return;
if( ! current_user_can( 'administrator' ) ) return;
if( ! LicenseModule::is_development_site() ) return;
if( get_transient( self::$shared_dev_env_transient ) ) return;
self::$dev_env_notice_shown = true;
$dismiss_url = wp_nonce_url(
add_query_arg( 'gvectors_dismiss_dev_env', '1' ),
'gvectors_dismiss_dev_env'
);
printf(
''
. '
⚠️ %s
'
. '
%s
'
. '
%s
'
. '
' . esc_html( $txn ) . '';
} elseif( $key ) {
$rows .= '' . esc_html( $name . ' (' . $plan . ')' ) . ' — '
. esc_html__( 'License Key', 'gvectors' ) . ': ' . esc_html( $key ) . '';
} else {
$rows .= '' . esc_html( $name . ' (' . $plan . ')' ) . '';
}
if( ! empty( $license['status'] ) && $license['status'] === 'trial' ) {
$rows .= ' (' . esc_html__( 'Trial', 'gvectors' ) . ')';
}
$rows .= '';
}
printf(
''
. '
ℹ️ %s
'
. '
%s
'
. '
'
. '
%s
'
. '
%s
'
. '
'
. '
⚠️ %s %s
'
. '
%s
'
. '
%s
'
. '
%s
'
. '
%s
'
. '
' . esc_html( $slug ) . '',
esc_html( $reason_text ),
$status_text,
sprintf(
esc_html__( 'Please purchase a valid license at %s or remove the unauthorized addon.', 'gvectors' ),
'Addons Store'
),
esc_url( $dismiss_url ),
esc_html__( 'Dismiss for 5 days', 'gvectors' )
);
}
}
/**
* Register after_plugin_row hooks for installed addons that have updates but no active license.
* Shows a notice row on the Plugins page explaining that a license is required to update.
*/
public function register_unlicensed_update_row_hooks(): void {
if( ! is_admin() ) return;
$update_plugins = get_site_transient( 'update_plugins' );
if( empty( $update_plugins->response ) ) return;
$licenses = $this->licenseService->get_all();
// Build a set of plugin slugs that have an active/trial license for this domain
$active_licensed_slugs = [];
$site_domain = LicenseModule::get_site_domain();
foreach( $licenses as $license ) {
if( empty( $license['license_key'] ) ) continue;
if( ! in_array( $license['status'] ?? '', [ 'active', 'trial' ], true ) ) continue;
if( ! empty( $license['expires_at'] ) && strtotime( $license['expires_at'] ) < time() ) continue;
if( ! empty( $site_domain ) ) {
$activated_site = $license['site_domain'] ?? '';
if( ! empty( $activated_site ) && LicenseModule::normalize_domain( $activated_site ) !== LicenseModule::normalize_domain( $site_domain ) ) continue;
}
$slug = $license['plugin_slug'] ?? '';
if( ! empty( $slug ) ) $active_licensed_slugs[] = $slug;
}
// Also include slugs that have an active (non-expired) legacy license
$all_legacy = get_option( $this->legacy_licenses_option, [] );
foreach( $all_legacy as $legacy_slug => $legacy ) {
if( empty( $legacy['has_license'] ) || ! empty( $legacy['expired'] ) ) continue;
$active_licensed_slugs[] = $legacy_slug;
}
foreach( $update_plugins->response as $plugin_file => $update_data ) {
$slug = dirname( $plugin_file );
if( $slug === '.' || $slug === $this->config->get_core_plugin_slug() ) continue;
// Only for our addons that have empty package (no active license)
$package = is_object( $update_data ) ? ( $update_data->package ?? '' ) : '';
if( ! empty( $package ) ) continue;
// Confirm it's a known gVectors addon
if( ! $this->is_known_addon( $slug ) ) continue;
// Confirm no active license
if( in_array( $slug, $active_licensed_slugs, true ) ) continue;
add_action( "after_plugin_row_$plugin_file", [ $this, 'unlicensed_update_notice_row' ] );
}
}
/**
* Display an inline notice row on the Plugins page for addons that need a license to update.
*/
public function unlicensed_update_notice_row( $plugin_file ): void {
$update_plugins = get_site_transient( 'update_plugins' );
$update = $update_plugins->response[ $plugin_file ] ?? null;
if( ! $update ) return;
$wp_list_table = _get_list_table( 'WP_Plugins_List_Table' );
$columns_count = $wp_list_table ? $wp_list_table->get_column_count() : 3;
echo '';
echo '';
echo '';
printf(
' ' .
__( 'Warning: your license is not active. Please activate your existing license or purchase a new one to receive updates.', 'gvectors' ) .
' ',
esc_url( admin_url( $this->config->get_dashboard_addons_store_url() ) )
);
echo ' | ';
echo '
';
}
/**
* Display persistent admin notice for expired licenses.
* Addon keeps working, but no updates are available.
*/
public function expired_license_notice(): void {
if( ! $this->is_notice_page() ) return;
if( ! current_user_can( 'administrator' ) ) return;
$expired = get_option( $this->expired_notice_option, [] );
if( empty( $expired ) ) return;
foreach( $expired as $slug => $info ) {
if( get_transient( 'gvectors_expired_dismissed_' . $slug ) ) continue;
$product_name = $info['product_name'] ?? $slug;
$has_update = ! empty( $info['has_update'] );
$latest = $info['latest_version'] ?? '';
$current = $info['current_version'] ?? '';
$update_text = '';
if( $has_update ) {
$update_text = sprintf(
' ' . esc_html__( 'A new version (%1$s) is available but your current version (%2$s) cannot be updated without an active subscription.', 'gvectors' ),
'' . esc_html( $latest ) . '',
'' . esc_html( $current ) . ''
);
}
$dismiss_url = wp_nonce_url(
add_query_arg( [ 'gvectors_dismiss_addon_notice' => 'expired', 'gvectors_notice_slug' => $slug ] ),
'gvectors_dismiss_expired_' . $slug
);
printf(
''
. '
%s %s%s
'
. '
%s
'
. '
%s
'
. '
'
. '
%s %s
'
. '
%s
'
. '
%s
'
. '