279 lines
7.4 KiB
PHP
279 lines
7.4 KiB
PHP
<?php defined( 'ABSPATH' ) or die();
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if ( ! class_exists( 'rsssl_certificate' ) ) {
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class rsssl_certificate {
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private static $_this;
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public function __construct() {
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if ( isset( self::$_this ) ) {
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wp_die( 'you cannot create a second instance.' );
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}
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self::$_this = $this;
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}
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public static function this() {
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return self::$_this;
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}
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/**
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*
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* @since 3.0
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*
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* Check if the certificate is valid
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*
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* @return bool
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*
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*/
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public function is_valid(): bool {
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$domain = $this->get_domain();
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if ( ! $domain || ! function_exists( 'stream_context_get_params' ) ) {
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set_transient( 'rsssl_certinfo', 'no-response', DAY_IN_SECONDS );
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} else {
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$certinfo = $this->get_certinfo( $domain );
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if ( ! $certinfo ) {
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return false;
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}
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$domain_valid = $this->is_domain_valid( $certinfo, $domain );
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$date_valid = $this->is_date_valid( $certinfo );
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if ( $domain_valid && $date_valid ) {
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return true;
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}
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}
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return false;
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}
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/**
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* get domain
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* @return string
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*/
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public function get_domain() {
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$domain = site_url();
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//Parse to strip off any /subfolder/
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$parse = parse_url( $domain );
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return isset( $parse['host'] ) ? $parse['host'] : false;
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}
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/**
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*
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* Check common name(s) and alternative name(s) on certificate and match them to the site_url ($domain)
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*
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* @since 3.0
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*
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* @access public
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* @param $certinfo
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* @param $domain
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* @return bool
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*
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*/
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public function is_domain_valid( $certinfo, $domain ): bool {
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//first check standard situation
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//Get both the common name(s) and the alternative names from the certificate
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$certificate_common_names = isset( $certinfo['subject']['CN'] ) ? $certinfo['subject']['CN'] : '';
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$certificate_alternative_names = isset( $certinfo['extensions']['subjectAltName'] ) ? $certinfo['extensions']['subjectAltName'] : '';
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//Check if the domain is found in either the certificate common name(s) (CN) or alternative name(s) (AN)
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$pos_cn = strpos( $certificate_common_names, $domain );
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$pos_an = strpos( $certificate_alternative_names, $domain );
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//If the domain is found, return true
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if ( false !== $pos_cn || false !== $pos_an ) {
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return true;
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}
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//if nothing found, we check for wildcard
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//strip of asterisk, and check if the wildcard domain is part of current domain
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$cert_domains = array();
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if ( $this->is_wildcard() ) {
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$certificate_alternative_names = explode( ', ', $certificate_alternative_names );
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$cert_domains[] = trim( str_replace( '*', '', $certificate_common_names ) );
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foreach ( $certificate_alternative_names as $subject_alt_name ) {
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$cert_domains[] = trim( str_replace( '*', '', $subject_alt_name ) );
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}
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foreach ( $cert_domains as $cert_domain ) {
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//If the wildcard domain is found, return true
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if ( ( strpos( $domain, $cert_domain ) !== false ) ) {
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return true;
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}
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}
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}
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return false;
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}
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/**
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* Check if detection failed
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* @return bool
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*/
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public function detection_failed() {
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$certinfo = get_transient( 'rsssl_certinfo' );
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if ( $certinfo && 'no-response' === $certinfo ) {
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return true;
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}
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return false;
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}
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/**
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*
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* Check if the date is valid by looking at the validFrom and validTo times
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*
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* @since 3.0
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*
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* @access public
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*
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* @return bool
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*
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*/
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public function is_date_valid( $certinfo ) {
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//Get the start date and end date from the certificate
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$start_date = isset( $certinfo['validFrom_time_t'] ) ? $certinfo['validFrom_time_t'] : false;
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$end_date = isset( $certinfo['validTo_time_t'] ) ? $certinfo['validTo_time_t'] : false;
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$current_date = time();
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//Check if the current date is between the start date and end date. If so, return true
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if ( $current_date > $start_date && ( $current_date < $end_date ) ) {
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return true;
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}
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return false;
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}
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/**
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* Check if the certificate is valid, but about to expire.
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* @return bool
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*/
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public function about_to_expire() {
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//if not valid, it's already expired
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if ( ! $this->is_valid() ) {
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return true;
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}
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//we have now renewed the cert info transient
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$certinfo = get_transient( 'rsssl_certinfo' );
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$end_date = isset( $certinfo['validTo_time_t'] ) ? $certinfo['validTo_time_t'] : false;
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$expiry_days_time = strtotime( '+' . rsssl_le_manual_generation_renewal_check . ' days' );
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if ( $expiry_days_time < $end_date ) {
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return false;
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} else {
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return true;
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}
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}
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/**
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*
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* Check if the certificate is a wildcard certificate
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* Function is used in class-multisite.php to determine whether to show a notice for multisite subfolder installations without a wildcard certificate
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*
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* @since 3.0
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*
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* @access public
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*
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* @return bool
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*
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*/
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public function is_wildcard() {
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$domain = network_site_url();
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$certinfo = $this->get_certinfo( $domain );
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//Get the certificate common name
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$certificate_common_name = isset( $certinfo['subject']['CN'] ) ? $certinfo['subject']['CN'] : false;
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$subject_alt_names = isset( $certinfo['extensions']['subjectAltName'] ) ? explode( ', ', $certinfo['extensions']['subjectAltName'] ) : false;
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//Check if the common name(s) contain an *
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if ( strpos( $certificate_common_name, '*' ) ) {
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return true;
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}
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if ( is_array( $subject_alt_names ) ) {
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foreach ( $subject_alt_names as $subject_alt_name ) {
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if ( strpos( $subject_alt_name, '*' ) !== false ) {
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return true;
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}
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}
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}
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return false;
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}
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/**
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*
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* Get the certificate info
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*
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* @since 3.0
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* @param string $url
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* @return string|bool
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* @access public
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*
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*/
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public function get_certinfo( $url ) {
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$certinfo = get_transient( 'rsssl_certinfo' );
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//if the last check resulted in a "no response", we skip this check for a day.
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if ( 'no-response' === $certinfo ) {
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return false;
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}
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if ( ! $certinfo || RSSSL()->admin->is_settings_page() ) {
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$url = 'https://' . str_replace( array( 'https://', 'http://' ), '', $url );
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$original_parse = parse_url( $url, PHP_URL_HOST );
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if ( $original_parse ) {
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$get = stream_context_create( array( 'ssl' => array( 'capture_peer_cert' => true ) ) );
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if ( $get ) {
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set_error_handler( array( $this, 'custom_error_handling' ) );
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$read = stream_socket_client( 'ssl://' . $original_parse . ':443', $errno, $errstr, 5, STREAM_CLIENT_CONNECT, $get );
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restore_error_handler();
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if ( ! $read ) {
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$certinfo = 'no-response';
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}
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if ( 0 === $errno && $read ) {
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$cert = stream_context_get_params( $read );
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if ( isset( $cert['options']['ssl']['peer_certificate'] ) ) {
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$certinfo = openssl_x509_parse( $cert['options']['ssl']['peer_certificate'] );
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} else {
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$certinfo = 'no-response';
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}
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}
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}
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}
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set_transient( 'rsssl_certinfo', $certinfo, DAY_IN_SECONDS );
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}
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if ( 'not-valid' === $certinfo ) {
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return false;
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}
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if ( ! empty( $certinfo ) ) {
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return $certinfo;
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}
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return false;
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}
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/**
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* Catch errors
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*
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* @since 3.0
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*
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* @access public
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* @param $errno
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* @param $errstr
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* @param $errfile
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* @param $errline
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* @param array $errcontext
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*
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* @return bool
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*/
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public function custom_error_handling( $errno, $errstr, $errfile, $errline, $errcontext = array() ) {
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return true;
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}
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//class closure
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}
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}
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