577 lines
14 KiB
PHP
577 lines
14 KiB
PHP
<?php
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add_action( 'wpcf7_init', 'wpcf7_recaptcha_register_service', 10, 0 );
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function wpcf7_recaptcha_register_service() {
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$integration = WPCF7_Integration::get_instance();
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$integration->add_category( 'captcha',
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__( 'CAPTCHA', 'contact-form-7' )
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);
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$integration->add_service( 'recaptcha',
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WPCF7_RECAPTCHA::get_instance()
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);
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}
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add_action( 'wp_enqueue_scripts', 'wpcf7_recaptcha_enqueue_scripts', 10, 0 );
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function wpcf7_recaptcha_enqueue_scripts() {
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$service = WPCF7_RECAPTCHA::get_instance();
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if ( ! $service->is_active() ) {
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return;
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}
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$url = add_query_arg(
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array(
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'render' => $service->get_sitekey(),
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),
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'https://www.google.com/recaptcha/api.js'
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);
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wp_enqueue_script( 'google-recaptcha', $url, array(), '3.0', true );
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}
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add_filter( 'wpcf7_form_hidden_fields',
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'wpcf7_recaptcha_add_hidden_fields', 100, 1 );
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function wpcf7_recaptcha_add_hidden_fields( $fields ) {
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$service = WPCF7_RECAPTCHA::get_instance();
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if ( ! $service->is_active() ) {
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return $fields;
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}
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return array_merge( $fields, array(
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'g-recaptcha-response' => '',
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) );
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}
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add_action( 'wp_footer', 'wpcf7_recaptcha_onload_script', 40, 0 );
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function wpcf7_recaptcha_onload_script() {
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$service = WPCF7_RECAPTCHA::get_instance();
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if ( ! $service->is_active() ) {
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return;
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}
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if ( ! wp_script_is( 'google-recaptcha', 'done' ) ) {
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return;
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}
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$actions = apply_filters( 'wpcf7_recaptcha_actions',
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array(
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'homepage' => 'homepage',
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'contactform' => 'contactform',
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)
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);
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?>
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<script type="text/javascript">
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( function( grecaptcha, sitekey, actions ) {
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var wpcf7recaptcha = {
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execute: function( action ) {
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grecaptcha.execute(
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sitekey,
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{ action: action }
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).then( function( token ) {
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var forms = document.getElementsByTagName( 'form' );
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for ( var i = 0; i < forms.length; i++ ) {
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var fields = forms[ i ].getElementsByTagName( 'input' );
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for ( var j = 0; j < fields.length; j++ ) {
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var field = fields[ j ];
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if ( 'g-recaptcha-response' === field.getAttribute( 'name' ) ) {
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field.setAttribute( 'value', token );
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break;
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}
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}
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}
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} );
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},
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executeOnHomepage: function() {
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wpcf7recaptcha.execute( actions[ 'homepage' ] );
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},
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executeOnContactform: function() {
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wpcf7recaptcha.execute( actions[ 'contactform' ] );
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},
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};
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grecaptcha.ready(
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wpcf7recaptcha.executeOnHomepage
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);
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document.addEventListener( 'change',
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wpcf7recaptcha.executeOnContactform, false
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);
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document.addEventListener( 'wpcf7submit',
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wpcf7recaptcha.executeOnHomepage, false
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);
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} )(
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grecaptcha,
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'<?php echo esc_js( $service->get_sitekey() ); ?>',
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<?php echo json_encode( $actions ), "\n"; ?>
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);
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</script>
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<?php
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}
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add_filter( 'wpcf7_spam', 'wpcf7_recaptcha_verify_response', 9, 1 );
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function wpcf7_recaptcha_verify_response( $spam ) {
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if ( $spam ) {
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return $spam;
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}
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$service = WPCF7_RECAPTCHA::get_instance();
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if ( ! $service->is_active() ) {
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return $spam;
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}
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$submission = WPCF7_Submission::get_instance();
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$token = isset( $_POST['g-recaptcha-response'] )
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? trim( $_POST['g-recaptcha-response'] ) : '';
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if ( $service->verify( $token ) ) { // Human
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$spam = false;
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} else { // Bot
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$spam = true;
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if ( '' === $token ) {
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$submission->add_spam_log( array(
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'agent' => 'recaptcha',
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'reason' => __( 'reCAPTCHA response token is empty.', 'contact-form-7' ),
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) );
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} else {
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$submission->add_spam_log( array(
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'agent' => 'recaptcha',
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'reason' => sprintf(
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__( 'reCAPTCHA score (%1$.2f) is lower than the threshold (%2$.2f).', 'contact-form-7' ),
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$service->get_last_score(),
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$service->get_threshold()
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),
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) );
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}
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}
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return $spam;
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}
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add_action( 'wpcf7_init', 'wpcf7_recaptcha_add_form_tag_recaptcha', 10, 0 );
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function wpcf7_recaptcha_add_form_tag_recaptcha() {
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$service = WPCF7_RECAPTCHA::get_instance();
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if ( ! $service->is_active() ) {
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return;
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}
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wpcf7_add_form_tag( 'recaptcha',
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'__return_empty_string', // no output
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array( 'display-block' => true )
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);
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}
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add_action( 'wpcf7_upgrade', 'wpcf7_upgrade_recaptcha_v2_v3', 10, 2 );
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function wpcf7_upgrade_recaptcha_v2_v3( $new_ver, $old_ver ) {
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if ( version_compare( '5.1-dev', $old_ver, '<=' ) ) {
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return;
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}
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$service = WPCF7_RECAPTCHA::get_instance();
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if ( ! $service->is_active() ) {
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return;
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}
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// Maybe v2 keys are used now. Warning necessary.
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WPCF7::update_option( 'recaptcha_v2_v3_warning', true );
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WPCF7::update_option( 'recaptcha', null );
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}
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add_action( 'wpcf7_admin_menu', 'wpcf7_admin_init_recaptcha_v2_v3', 10, 0 );
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function wpcf7_admin_init_recaptcha_v2_v3() {
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if ( ! WPCF7::get_option( 'recaptcha_v2_v3_warning' ) ) {
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return;
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}
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add_filter( 'wpcf7_admin_menu_change_notice',
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'wpcf7_admin_menu_change_notice_recaptcha_v2_v3', 10, 1 );
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add_action( 'wpcf7_admin_warnings',
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'wpcf7_admin_warnings_recaptcha_v2_v3', 5, 3 );
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}
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function wpcf7_admin_menu_change_notice_recaptcha_v2_v3( $counts ) {
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$counts['wpcf7-integration'] += 1;
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return $counts;
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}
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function wpcf7_admin_warnings_recaptcha_v2_v3( $page, $action, $object ) {
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if ( 'wpcf7-integration' !== $page ) {
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return;
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}
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$message = sprintf(
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esc_html( __( "API keys for reCAPTCHA v3 are different from those for v2; keys for v2 don’t work with the v3 API. You need to register your sites again to get new keys for v3. For details, see %s.", 'contact-form-7' ) ),
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wpcf7_link(
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__( 'https://contactform7.com/recaptcha/', 'contact-form-7' ),
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__( 'reCAPTCHA (v3)', 'contact-form-7' )
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)
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);
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echo sprintf(
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'<div class="notice notice-warning"><p>%s</p></div>',
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$message
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);
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}
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if ( ! class_exists( 'WPCF7_Service' ) ) {
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return;
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}
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class WPCF7_RECAPTCHA extends WPCF7_Service {
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private static $instance;
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private $sitekeys;
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private $last_score;
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public static function get_instance() {
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if ( empty( self::$instance ) ) {
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self::$instance = new self;
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}
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return self::$instance;
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}
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private function __construct() {
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$this->sitekeys = WPCF7::get_option( 'recaptcha' );
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}
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public function get_title() {
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return __( 'reCAPTCHA', 'contact-form-7' );
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}
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public function is_active() {
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$sitekey = $this->get_sitekey();
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$secret = $this->get_secret( $sitekey );
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return $sitekey && $secret;
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}
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public function get_categories() {
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return array( 'captcha' );
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}
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public function icon() {
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}
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public function link() {
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echo wpcf7_link(
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'https://www.google.com/recaptcha/intro/index.html',
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'google.com/recaptcha'
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);
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}
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public function get_global_sitekey() {
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static $sitekey = '';
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if ( $sitekey ) {
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return $sitekey;
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}
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if ( defined( 'WPCF7_RECAPTCHA_SITEKEY' ) ) {
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$sitekey = WPCF7_RECAPTCHA_SITEKEY;
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}
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$sitekey = apply_filters( 'wpcf7_recaptcha_sitekey', $sitekey );
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return $sitekey;
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}
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public function get_global_secret() {
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static $secret = '';
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if ( $secret ) {
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return $secret;
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}
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if ( defined( 'WPCF7_RECAPTCHA_SECRET' ) ) {
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$secret = WPCF7_RECAPTCHA_SECRET;
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}
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$secret = apply_filters( 'wpcf7_recaptcha_secret', $secret );
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return $secret;
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}
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public function get_sitekey() {
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if ( $this->get_global_sitekey() && $this->get_global_secret() ) {
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return $this->get_global_sitekey();
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}
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if ( empty( $this->sitekeys )
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or ! is_array( $this->sitekeys ) ) {
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return false;
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}
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$sitekeys = array_keys( $this->sitekeys );
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return $sitekeys[0];
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}
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public function get_secret( $sitekey ) {
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if ( $this->get_global_sitekey() && $this->get_global_secret() ) {
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return $this->get_global_secret();
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}
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$sitekeys = (array) $this->sitekeys;
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if ( isset( $sitekeys[$sitekey] ) ) {
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return $sitekeys[$sitekey];
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} else {
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return false;
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}
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}
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protected function log( $url, $request, $response ) {
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wpcf7_log_remote_request( $url, $request, $response );
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}
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public function verify( $token ) {
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$is_human = false;
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if ( empty( $token ) or ! $this->is_active() ) {
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return $is_human;
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}
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$endpoint = 'https://www.google.com/recaptcha/api/siteverify';
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$sitekey = $this->get_sitekey();
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$secret = $this->get_secret( $sitekey );
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$request = array(
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'body' => array(
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'secret' => $secret,
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'response' => $token,
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),
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);
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$response = wp_remote_post( esc_url_raw( $endpoint ), $request );
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if ( 200 != wp_remote_retrieve_response_code( $response ) ) {
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if ( WP_DEBUG ) {
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$this->log( $endpoint, $request, $response );
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}
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return $is_human;
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}
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$response_body = wp_remote_retrieve_body( $response );
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$response_body = json_decode( $response_body, true );
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$this->last_score = $score = isset( $response_body['score'] )
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? $response_body['score']
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: 0;
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$threshold = $this->get_threshold();
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$is_human = $threshold < $score;
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$is_human = apply_filters( 'wpcf7_recaptcha_verify_response',
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$is_human, $response_body );
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if ( $submission = WPCF7_Submission::get_instance() ) {
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$submission->recaptcha = array(
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'version' => '3.0',
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'threshold' => $threshold,
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'response' => $response_body,
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);
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}
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return $is_human;
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}
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public function get_threshold() {
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return apply_filters( 'wpcf7_recaptcha_threshold', 0.50 );
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}
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public function get_last_score() {
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return $this->last_score;
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}
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protected function menu_page_url( $args = '' ) {
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$args = wp_parse_args( $args, array() );
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$url = menu_page_url( 'wpcf7-integration', false );
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$url = add_query_arg( array( 'service' => 'recaptcha' ), $url );
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if ( ! empty( $args) ) {
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$url = add_query_arg( $args, $url );
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}
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return $url;
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}
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protected function save_data() {
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WPCF7::update_option( 'recaptcha', $this->sitekeys );
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}
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protected function reset_data() {
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$this->sitekeys = null;
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$this->save_data();
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}
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public function load( $action = '' ) {
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if ( 'setup' == $action and 'POST' == $_SERVER['REQUEST_METHOD'] ) {
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check_admin_referer( 'wpcf7-recaptcha-setup' );
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if ( ! empty( $_POST['reset'] ) ) {
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$this->reset_data();
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$redirect_to = $this->menu_page_url( 'action=setup' );
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} else {
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$sitekey = isset( $_POST['sitekey'] ) ? trim( $_POST['sitekey'] ) : '';
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$secret = isset( $_POST['secret'] ) ? trim( $_POST['secret'] ) : '';
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if ( $sitekey and $secret ) {
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$this->sitekeys = array( $sitekey => $secret );
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$this->save_data();
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$redirect_to = $this->menu_page_url( array(
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'message' => 'success',
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) );
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} else {
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$redirect_to = $this->menu_page_url( array(
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'action' => 'setup',
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'message' => 'invalid',
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) );
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}
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}
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if ( WPCF7::get_option( 'recaptcha_v2_v3_warning' ) ) {
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WPCF7::update_option( 'recaptcha_v2_v3_warning', false );
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}
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wp_safe_redirect( $redirect_to );
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exit();
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}
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}
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public function admin_notice( $message = '' ) {
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if ( 'invalid' == $message ) {
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echo sprintf(
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'<div class="error notice notice-error is-dismissible"><p><strong>%1$s</strong>: %2$s</p></div>',
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esc_html( __( "ERROR", 'contact-form-7' ) ),
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esc_html( __( "Invalid key values.", 'contact-form-7' ) ) );
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}
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if ( 'success' == $message ) {
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echo sprintf( '<div class="updated notice notice-success is-dismissible"><p>%s</p></div>',
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esc_html( __( 'Settings saved.', 'contact-form-7' ) ) );
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}
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}
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public function display( $action = '' ) {
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echo '<p>' . sprintf(
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esc_html( __( 'reCAPTCHA protects you against spam and other types of automated abuse. With Contact Form 7’s reCAPTCHA integration module, you can block abusive form submissions by spam bots. For details, see %s.', 'contact-form-7' ) ),
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wpcf7_link(
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__( 'https://contactform7.com/recaptcha/', 'contact-form-7' ),
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__( 'reCAPTCHA (v3)', 'contact-form-7' )
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)
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) . '</p>';
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if ( $this->is_active() ) {
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echo sprintf(
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'<p class="dashicons-before dashicons-yes">%s</p>',
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esc_html( __( "reCAPTCHA is active on this site.", 'contact-form-7' ) )
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);
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}
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if ( 'setup' == $action ) {
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$this->display_setup();
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} else {
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echo sprintf(
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'<p><a href="%1$s" class="button">%2$s</a></p>',
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esc_url( $this->menu_page_url( 'action=setup' ) ),
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esc_html( __( 'Setup Integration', 'contact-form-7' ) )
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);
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}
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}
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private function display_setup() {
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$sitekey = $this->is_active() ? $this->get_sitekey() : '';
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$secret = $this->is_active() ? $this->get_secret( $sitekey ) : '';
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?>
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<form method="post" action="<?php echo esc_url( $this->menu_page_url( 'action=setup' ) ); ?>">
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<?php wp_nonce_field( 'wpcf7-recaptcha-setup' ); ?>
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<table class="form-table">
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<tbody>
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<tr>
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<th scope="row"><label for="sitekey"><?php echo esc_html( __( 'Site Key', 'contact-form-7' ) ); ?></label></th>
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<td><?php
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if ( $this->is_active() ) {
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echo esc_html( $sitekey );
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echo sprintf(
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'<input type="hidden" value="%1$s" id="sitekey" name="sitekey" />',
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esc_attr( $sitekey )
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);
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} else {
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echo sprintf(
|
|
'<input type="text" aria-required="true" value="%1$s" id="sitekey" name="sitekey" class="regular-text code" />',
|
|
esc_attr( $sitekey )
|
|
);
|
|
}
|
|
?></td>
|
|
</tr>
|
|
<tr>
|
|
<th scope="row"><label for="secret"><?php echo esc_html( __( 'Secret Key', 'contact-form-7' ) ); ?></label></th>
|
|
<td><?php
|
|
if ( $this->is_active() ) {
|
|
echo esc_html( wpcf7_mask_password( $secret ) );
|
|
echo sprintf(
|
|
'<input type="hidden" value="%1$s" id="secret" name="secret" />',
|
|
esc_attr( $secret )
|
|
);
|
|
} else {
|
|
echo sprintf(
|
|
'<input type="text" aria-required="true" value="%1$s" id="secret" name="secret" class="regular-text code" />',
|
|
esc_attr( $secret )
|
|
);
|
|
}
|
|
?></td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<?php
|
|
if ( $this->is_active() ) {
|
|
if ( $this->get_global_sitekey() && $this->get_global_secret() ) {
|
|
// nothing
|
|
} else {
|
|
submit_button(
|
|
_x( 'Remove Keys', 'API keys', 'contact-form-7' ),
|
|
'small', 'reset'
|
|
);
|
|
}
|
|
} else {
|
|
submit_button( __( 'Save Changes', 'contact-form-7' ) );
|
|
}
|
|
?>
|
|
</form>
|
|
<?php
|
|
}
|
|
}
|