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179
plugins/jetpack/modules/sharedaddy/recaptcha.php
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179
plugins/jetpack/modules/sharedaddy/recaptcha.php
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<?php
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/**
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* Class that handles reCAPTCHA.
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*/
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class Jetpack_ReCaptcha {
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/**
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* URL to which requests are POSTed.
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*
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* @const string
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*/
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const VERIFY_URL = 'https://www.google.com/recaptcha/api/siteverify';
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/**
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* Site key to use in HTML code.
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*
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* @var string
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*/
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private $site_key;
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/**
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* Shared secret for the site.
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*
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* @var string
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*/
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private $secret_key;
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/**
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* Config for reCAPTCHA instance.
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*
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* @var array
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*/
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private $config;
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/**
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* Error codes returned from reCAPTCHA API.
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*
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* @see https://developers.google.com/recaptcha/docs/verify
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*
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* @var array
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*/
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private $error_codes;
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/**
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* Create a configured instance to use the reCAPTCHA service.
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*
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* @param string $site_key Site key to use in HTML code.
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* @param string $secret_key Shared secret between site and reCAPTCHA server.
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* @param array $config Config array to optionally configure reCAPTCHA instance.
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*/
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public function __construct( $site_key, $secret_key, $config = array() ) {
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$this->site_key = $site_key;
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$this->secret_key = $secret_key;
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$this->config = wp_parse_args( $config, $this->get_default_config() );
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$this->error_codes = array(
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'missing-input-secret' => __( 'The secret parameter is missing', 'jetpack' ),
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'invalid-input-secret' => __( 'The secret parameter is invalid or malformed', 'jetpack' ),
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'missing-input-response' => __( 'The response parameter is missing', 'jetpack' ),
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'invalid-input-response' => __( 'The response parameter is invalid or malformed', 'jetpack' ),
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'invalid-json' => __( 'Invalid JSON', 'jetpack' ),
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'unexpected-response' => __( 'Unexpected response', 'jetpack' ),
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);
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}
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/**
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* Get default config for this reCAPTCHA instance.
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*
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* @return array Default config
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*/
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public function get_default_config() {
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return array(
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'language' => get_locale(),
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'script_async' => true,
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'tag_class' => 'g-recaptcha',
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'tag_attributes' => array(
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'theme' => 'light',
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'type' => 'image',
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'tabindex' => 0,
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),
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);
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}
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/**
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* Calls the reCAPTCHA siteverify API to verify whether the user passes
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* CAPTCHA test.
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*
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* @param string $response The value of 'g-recaptcha-response' in the submitted
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* form.
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* @param string $remote_ip The end user's IP address.
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*
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* @return bool|WP_Error Returns true if verified. Otherwise WP_Error is returned.
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*/
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public function verify( $response, $remote_ip ) {
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// No need make a request if response is empty.
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if ( empty( $response ) ) {
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return new WP_Error( 'missing-input-response', $this->error_codes['missing-input-response'], 400 );
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}
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$resp = wp_remote_post( self::VERIFY_URL, $this->get_verify_request_params( $response, $remote_ip ) );
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if ( is_wp_error( $resp ) ) {
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return $resp;
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}
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$resp_decoded = json_decode( wp_remote_retrieve_body( $resp ), true );
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if ( ! $resp_decoded ) {
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return new WP_Error( 'invalid-json', $this->error_codes['invalid-json'], 400 );
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}
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// Default error code and message.
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$error_code = 'unexpected-response';
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$error_message = $this->error_codes['unexpected-response'];
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// Use the first error code if exists.
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if ( isset( $resp_decoded['error-codes'] ) && is_array( $resp_decoded['error-codes'] ) ) {
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if ( isset( $resp_decoded['error-codes'][0] ) && isset( $this->error_codes[ $resp_decoded['error-codes'][0] ] ) ) {
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$error_message = $this->error_codes[ $resp_decoded['error-codes'][0] ];
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$error_code = $resp_decoded['error-codes'][0];
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}
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}
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if ( ! isset( $resp_decoded['success'] ) ) {
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return new WP_Error( $error_code, $error_message );
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}
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if ( true !== $resp_decoded['success'] ) {
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return new WP_Error( $error_code, $error_message );
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}
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return true;
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}
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/**
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* Get siteverify request parameters.
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*
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* @param string $response The value of 'g-recaptcha-response' in the submitted
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* form.
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* @param string $remote_ip The end user's IP address.
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*
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* @return array
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*/
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public function get_verify_request_params( $response, $remote_ip ) {
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return array(
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'body' => array(
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'secret' => $this->secret_key,
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'response' => $response,
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'remoteip' => $remote_ip,
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),
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'sslverify' => true,
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);
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}
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/**
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* Get reCAPTCHA HTML to render.
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*
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* @return string
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*/
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public function get_recaptcha_html() {
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return sprintf(
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'
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<div
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class="%s"
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data-sitekey="%s"
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data-theme="%s"
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data-type="%s"
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data-tabindex="%s"></div>
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<script type="text/javascript" src="https://www.google.com/recaptcha/api.js?hl=%s"%s></script>
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',
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esc_attr( $this->config['tag_class'] ),
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esc_attr( $this->site_key ),
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esc_attr( $this->config['tag_attributes']['theme'] ),
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esc_attr( $this->config['tag_attributes']['type'] ),
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esc_attr( $this->config['tag_attributes']['tabindex'] ),
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rawurlencode( $this->config['language'] ),
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$this->config['script_async'] ? ' async' : ''
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);
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}
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}
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