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Source View: wp_signature_hosts

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Understanding Source Code

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Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.

Source View

Line Code
1100      // If the caller expects signature verification to occur, check to see if this URL supports it.
1101      if ( $signature_verification ) {
1102           /**
1103            * Filters the list of hosts which should have Signature Verification attempted on.
1104            *
1105            * @since 5.2.0
1106            *
1107            * @param string[] $hostnames List of hostnames.
1108            */
1109           $signed_hostnames       = apply_filters( 'wp_signature_hosts', array( 'wordpress.org', 'downloads.wordpress.org', 's.w.org' ) );
1110           $signature_verification = in_array( parse_url( $url, PHP_URL_HOST ), $signed_hostnames, true );
1111      }
1112
1113      // Perform signature valiation if supported.
1114      if ( $signature_verification ) {
1115           $signature = wp_remote_retrieve_header( $response, 'x-content-signature' );
1116           if ( ! $signature ) {
1117                // Retrieve signatures from a file if the header wasn't included.
1118                // WordPress.org stores signatures at $package_url.sig.