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<?php |
| 2 |
/** |
| 3 |
* Security Analyzer — SSL/TLS category (12 pts). |
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* |
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* Checks: ssl_present (2), ssl_cert_valid (2), ssl_cert_expiry (2), |
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* https_redirect (1), tls_version (1), mixed_content (2), force_ssl_admin (2). |
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* |
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* @package Vigilante |
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* @since 2.1.0 |
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*/ |
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|
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// Prevent direct access. |
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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|
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/** |
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* SSL/TLS checks. |
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* |
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* Fast checks: is_ssl(), constants, settings. |
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* Slow checks: cert parsing, HTTP redirect probe, mixed content regex. |
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*/ |
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class Vigilante_SA_Category_SSL { |
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|
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const SLUG = 'ssl'; |
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|
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/** |
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* @var Vigilante_Settings |
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*/ |
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private $settings; |
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|
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public function __construct( Vigilante_Settings $settings ) { |
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$this->settings = $settings; |
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} |
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|
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/** |
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* Run the category. |
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* |
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* @param string $phase 'fast' | 'slow' | 'all'. |
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* @return Vigilante_SA_Check_Result[] |
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*/ |
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public function run( $phase = 'all' ) { |
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$results = array(); |
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|
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if ( 'fast' === $phase || 'all' === $phase ) { |
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$results[] = $this->check_ssl_present(); |
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$results[] = $this->check_force_ssl_admin(); |
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} |
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|
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if ( 'slow' === $phase || 'all' === $phase ) { |
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$cert = Vigilante_SA_Helpers::probe_tls(); |
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$results[] = $this->check_ssl_cert_valid( $cert ); |
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$results[] = $this->check_ssl_cert_expiry( $cert ); |
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$results[] = $this->check_https_redirect(); |
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$results[] = $this->check_tls_version( $cert ); |
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$results[] = $this->check_mixed_content(); |
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} |
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|
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return $results; |
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} |
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|
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private function check_ssl_present() { |
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$has_ssl = is_ssl(); |
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$home_url = (string) get_option( 'home' ); |
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$site_url = (string) get_option( 'siteurl' ); |
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$urls_ok = 0 === strpos( $home_url, 'https://' ) && 0 === strpos( $site_url, 'https://' ); |
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|
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$args = array( |
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'id' => 'ssl_present', |
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'category' => self::SLUG, |
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'max' => 2, |
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'label' => __( 'HTTPS status', 'vigilante' ), |
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'fix_link' => Vigilante_SA_Helpers::build_fix_url( 'headers', 'vigilante-section-headers-force-https' ), |
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); |
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|
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if ( $has_ssl && $urls_ok ) { |
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$args['detail'] = __( 'Site uses HTTPS; both home and siteurl URLs start with https://.', 'vigilante' ); |
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return Vigilante_SA_Check_Result::pass( $args ); |
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} |
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if ( $has_ssl && ! $urls_ok ) { |
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$args['detail'] = __( 'HTTPS is active but one of the WordPress URLs (home/siteurl) still uses http://. Update them under Settings → General.', 'vigilante' ); |
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return Vigilante_SA_Check_Result::warn( $args ); |
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} |
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$args['detail'] = __( 'HTTPS is not active. Enable a TLS certificate in your host and force HTTPS redirection.', 'vigilante' ); |
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return Vigilante_SA_Check_Result::fail( $args ); |
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} |
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|
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private function check_ssl_cert_valid( $cert ) { |
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$args = array( |
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'id' => 'ssl_cert_valid', |
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'category' => self::SLUG, |
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'max' => 2, |
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'label' => __( 'TLS certificate', 'vigilante' ), |
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'fix_link' => '', |
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); |
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|
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if ( empty( $cert ) || empty( $cert['valid'] ) ) { |
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$args['detail'] = __( 'Could not read a valid TLS certificate for the public domain. Check your hosting or CDN.', 'vigilante' ); |
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return Vigilante_SA_Check_Result::fail( $args ); |
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} |
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|
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$now = time(); |
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if ( $cert['valid_from'] > 0 && $now < $cert['valid_from'] ) { |
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$args['detail'] = __( 'The certificate is not yet valid (notBefore in the future). Check the server clock.', 'vigilante' ); |
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return Vigilante_SA_Check_Result::fail( $args ); |
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} |
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if ( $cert['valid_to'] > 0 && $now > $cert['valid_to'] ) { |
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$args['detail'] = __( 'The certificate has expired. Renew it immediately in your host.', 'vigilante' ); |
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return Vigilante_SA_Check_Result::fail( $args ); |
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} |
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|
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$args['detail'] = sprintf( |
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/* translators: 1: issuer CN, 2: subject CN */ |
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__( 'Issued by %1$s for %2$s.', 'vigilante' ), |
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$cert['issuer'] ? $cert['issuer'] : __( '(unknown)', 'vigilante' ), |
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$cert['subject'] ? $cert['subject'] : __( '(unknown)', 'vigilante' ) |
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); |
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$args['data'] = array( |
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'issuer' => $cert['issuer'], |
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'subject' => $cert['subject'], |
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); |
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return Vigilante_SA_Check_Result::pass( $args ); |
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} |
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|
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private function check_ssl_cert_expiry( $cert ) { |
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$args = array( |
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'id' => 'ssl_cert_expiry', |
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'category' => self::SLUG, |
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'max' => 2, |
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'label' => __( 'Certificate expiry', 'vigilante' ), |
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'fix_link' => '', |
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); |
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|
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if ( empty( $cert ) || empty( $cert['valid'] ) || null === $cert['days_left'] ) { |
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$args['detail'] = __( 'Could not read the certificate expiry.', 'vigilante' ); |
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return Vigilante_SA_Check_Result::skip( $args ); |
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} |
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|
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$days = (int) $cert['days_left']; |
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$args['data'] = array( 'days_left' => $days ); |
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|
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if ( $days < 0 ) { |
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$args['detail'] = sprintf( |
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/* translators: %d: days since expiry */ |
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__( 'The certificate expired %d days ago.', 'vigilante' ), |
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abs( $days ) |
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); |
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return Vigilante_SA_Check_Result::fail( $args ); |
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} |
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|
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if ( $days < 14 ) { |
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$args['detail'] = sprintf( |
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/* translators: %d: days remaining */ |
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__( 'The certificate expires in %d days. Schedule renewal now.', 'vigilante' ), |
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$days |
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); |
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return Vigilante_SA_Check_Result::fail( $args ); |
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} |
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|
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if ( $days < 30 ) { |
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$args['detail'] = sprintf( |
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/* translators: %d: days remaining */ |
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__( 'The certificate expires in %d days. Plan renewal soon.', 'vigilante' ), |
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$days |
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); |
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return Vigilante_SA_Check_Result::warn( $args ); |
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} |
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|
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$args['detail'] = sprintf( |
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/* translators: %d: days remaining */ |
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__( '%d days until the certificate expires.', 'vigilante' ), |
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$days |
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); |
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return Vigilante_SA_Check_Result::pass( $args ); |
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} |
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|
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private function check_https_redirect() { |
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$args = array( |
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'id' => 'https_redirect', |
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'category' => self::SLUG, |
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'max' => 1, |
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'label' => __( 'HTTP → HTTPS redirect', 'vigilante' ), |
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'fix_link' => Vigilante_SA_Helpers::build_fix_url( 'headers', 'vigilante-section-headers-force-https' ), |
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); |
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|
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$http_url = set_url_scheme( home_url( '/' ), 'http' ); |
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$response = Vigilante_SA_Helpers::get( $http_url, array( 'redirection' => 0 ) ); |
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|
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if ( is_wp_error( $response ) ) { |
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$args['detail'] = __( 'Could not probe the HTTP version of the site (firewall may be blocking self-requests).', 'vigilante' ); |
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return Vigilante_SA_Check_Result::skip( $args ); |
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} |
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|
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$code = (int) wp_remote_retrieve_response_code( $response ); |
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$location = (string) wp_remote_retrieve_header( $response, 'location' ); |
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|
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if ( $code >= 300 && $code < 400 && 0 === strpos( $location, 'https://' ) ) { |
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$args['detail'] = __( 'HTTP requests received a 3xx redirect to an https:// URL.', 'vigilante' ); |
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return Vigilante_SA_Check_Result::pass( $args ); |
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} |
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|
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$args['detail'] = __( 'The site is reachable over plain HTTP without a redirect to HTTPS.', 'vigilante' ); |
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return Vigilante_SA_Check_Result::fail( $args ); |
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} |
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|
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private function check_tls_version( $cert ) { |
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$args = array( |
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'id' => 'tls_version', |
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'category' => self::SLUG, |
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'max' => 1, |
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'label' => __( 'TLS version', 'vigilante' ), |
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'fix_link' => '', |
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); |
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|
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if ( empty( $cert ) || empty( $cert['tls_version'] ) ) { |
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$args['detail'] = __( 'Could not determine the negotiated TLS version.', 'vigilante' ); |
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return Vigilante_SA_Check_Result::skip( $args ); |
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} |
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|
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$version = $cert['tls_version']; |
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$args['data'] = array( 'tls_version' => $version ); |
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|
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if ( stripos( $version, 'TLSv1.3' ) !== false || stripos( $version, 'TLSv1.2' ) !== false ) { |
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$args['detail'] = sprintf( |
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/* translators: %s: TLS version like TLSv1.3 */ |
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__( 'The server negotiated %s.', 'vigilante' ), |
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$version |
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); |
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return Vigilante_SA_Check_Result::pass( $args ); |
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} |
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|
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$args['detail'] = sprintf( |
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/* translators: %s: TLS version */ |
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__( 'The server negotiated %s. Ask your host to disable TLS 1.0/1.1.', 'vigilante' ), |
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$version |
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); |
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return Vigilante_SA_Check_Result::fail( $args ); |
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} |
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|
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private function check_mixed_content() { |
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$args = array( |
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'id' => 'mixed_content', |
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'category' => self::SLUG, |
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'max' => 2, |
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'label' => __( 'Mixed content on the homepage', 'vigilante' ), |
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'fix_link' => Vigilante_SA_Helpers::build_fix_url( 'headers', 'vigilante-section-headers-main' ), |
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); |
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|
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// The fix is applied by the HTTPS enforcer, which only loads with the |
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// Security Headers module on. |
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$fix_setting = (int) ( $this->settings->is_module_enabled( 'security_headers' ) |
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&& $this->settings->get_option( 'security_headers', 'fix_mixed_content', 0 ) ); |
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$probe = Vigilante_SA_Helpers::probe_home(); |
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|
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if ( null === $probe ) { |
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$args['detail'] = __( 'Could not fetch the homepage to scan for insecure resources.', 'vigilante' ); |
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return Vigilante_SA_Check_Result::skip( $args ); |
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} |
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|
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// Count http:// occurrences in src/href attributes on HTTPS pages only. |
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if ( ! is_ssl() ) { |
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$args['detail'] = __( 'HTTPS is not active yet, so mixed content cannot be evaluated.', 'vigilante' ); |
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return Vigilante_SA_Check_Result::skip( $args ); |
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} |
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|
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// Only count references the browser actually loads as subresources. |
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// A plain <a href="http://..."> is a navigation, not mixed content: the |
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// browser does not flag it and nothing insecure is pulled into the page. |
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// Counting every href made ordinary outbound links to http:// sites read |
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// as insecure content, which is a false positive users cannot act on. |
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$matches = array(); |
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preg_match_all( '#src=["\']http://[^"\']+["\']#i', $probe['body'], $matches ); |
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$count = isset( $matches[0] ) ? count( $matches[0] ) : 0; |
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|
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// <link> only counts when its rel actually fetches something. Values like |
| 276 |
// canonical, alternate, pingback or EditURI are metadata, not subresources. |
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$link_tags = array(); |
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preg_match_all( '#<link\b[^>]*>#i', $probe['body'], $link_tags ); |
| 279 |
foreach ( $link_tags[0] as $link_tag ) { |
| 280 |
if ( ! preg_match( '#href=["\']http://#i', $link_tag ) ) { |
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continue; |
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} |
| 283 |
if ( preg_match( '#rel=["\'][^"\']*\b(stylesheet|preload|modulepreload|prefetch|preconnect|icon|manifest)\b#i', $link_tag ) ) { |
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$count++; |
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} |
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} |
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|
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// An enforced CSP with upgrade-insecure-requests makes the browser |
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// load every subrequest over HTTPS (external references included), |
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// so remaining http:// strings in the HTML are not mixed content in |
| 291 |
// practice. Measured on the live response, not on settings: a CDN |
| 292 |
// that strips the header must not count as protected. Report-Only |
| 293 |
// policies do not upgrade, hence only the enforced header counts. |
| 294 |
$csp_header = isset( $probe['headers']['content-security-policy'] ) ? $probe['headers']['content-security-policy'] : ''; |
| 295 |
if ( is_array( $csp_header ) ) { |
| 296 |
$csp_header = implode( ', ', $csp_header ); |
| 297 |
} |
| 298 |
$upgrades = ( false !== stripos( (string) $csp_header, 'upgrade-insecure-requests' ) ); |
| 299 |
|
| 300 |
$args['data'] = array( |
| 301 |
'insecure_refs' => $count, |
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'fix_setting_active' => (bool) $fix_setting, |
| 303 |
'csp_upgrades' => $upgrades, |
| 304 |
); |
| 305 |
|
| 306 |
if ( 0 === $count ) { |
| 307 |
$args['detail'] = $fix_setting |
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? __( 'No insecure references in the homepage HTML; mixed-content fix is enabled in settings.', 'vigilante' ) |
| 309 |
: __( 'No insecure references found in the homepage HTML.', 'vigilante' ); |
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return Vigilante_SA_Check_Result::pass( $args ); |
| 311 |
} |
| 312 |
|
| 313 |
if ( $upgrades ) { |
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$args['detail'] = sprintf( |
| 315 |
/* translators: %d: number of insecure references */ |
| 316 |
__( '%d http:// references in the HTML, but the response sends a CSP upgrade-insecure-requests directive, so browsers load them over HTTPS.', 'vigilante' ), |
| 317 |
$count |
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); |
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return Vigilante_SA_Check_Result::pass( $args ); |
| 320 |
} |
| 321 |
|
| 322 |
if ( $fix_setting ) { |
| 323 |
$args['detail'] = sprintf( |
| 324 |
/* translators: %d: number of insecure references */ |
| 325 |
__( '%d http:// references still leaked despite the mixed-content fix being enabled. Inspect the theme or a plugin output.', 'vigilante' ), |
| 326 |
$count |
| 327 |
); |
| 328 |
return Vigilante_SA_Check_Result::warn( $args ); |
| 329 |
} |
| 330 |
|
| 331 |
$args['detail'] = sprintf( |
| 332 |
/* translators: %d: number of insecure references */ |
| 333 |
__( '%d insecure http:// references found. Enable the mixed-content fix under Security Headers.', 'vigilante' ), |
| 334 |
$count |
| 335 |
); |
| 336 |
return Vigilante_SA_Check_Result::fail( $args ); |
| 337 |
} |
| 338 |
|
| 339 |
private function check_force_ssl_admin() { |
| 340 |
$args = array( |
| 341 |
'id' => 'force_ssl_admin', |
| 342 |
'category' => self::SLUG, |
| 343 |
'max' => 2, |
| 344 |
'label' => __( 'FORCE_SSL_ADMIN constant', 'vigilante' ), |
| 345 |
'fix_link' => Vigilante_SA_Helpers::build_fix_url( 'wp-hardening', 'field-force-ssl-admin' ), |
| 346 |
); |
| 347 |
|
| 348 |
$active = defined( 'FORCE_SSL_ADMIN' ) && FORCE_SSL_ADMIN; |
| 349 |
if ( $active ) { |
| 350 |
$args['detail'] = __( 'FORCE_SSL_ADMIN is defined as true; admin and login traffic requires HTTPS.', 'vigilante' ); |
| 351 |
return Vigilante_SA_Check_Result::pass( $args ); |
| 352 |
} |
| 353 |
|
| 354 |
if ( ! is_ssl() ) { |
| 355 |
$args['detail'] = __( 'HTTPS is not active yet, so enforcing SSL for the admin area is not applicable.', 'vigilante' ); |
| 356 |
return Vigilante_SA_Check_Result::skip( $args ); |
| 357 |
} |
| 358 |
|
| 359 |
$args['detail'] = __( 'FORCE_SSL_ADMIN is not set. Enable it from the WP Hardening tab so admin and login cookies only travel over HTTPS.', 'vigilante' ); |
| 360 |
return Vigilante_SA_Check_Result::fail( $args ); |
| 361 |
} |
| 362 |
} |
| 363 |
|
