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Privacy: add helper function for anonymizing data in a standardized way.
Props jesperher, allendav, iandunn, birgire, azaozz, joemcgill. Merges [42971] and [43081] to the 4.9 branch. Fixes #43545. Built from https://develop.svn.wordpress.org/branches/4.9@43082 git-svn-id: http://core.svn.wordpress.org/branches/4.9@42911 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Sergey Biryukov
parent
bcb3a839d1
commit
b433465f15
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@ -234,7 +234,6 @@ class WP_Community_Events {
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*/
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public static function get_unsafe_client_ip() {
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$client_ip = $netmask = false;
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$ip_prefix = '';
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// In order of preference, with the best ones for this purpose first.
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$address_headers = array(
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@ -265,43 +264,13 @@ class WP_Community_Events {
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return false;
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}
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// Detect what kind of IP address this is.
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$is_ipv6 = substr_count( $client_ip, ':' ) > 1;
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$is_ipv4 = ( 3 === substr_count( $client_ip, '.' ) );
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$anon_ip = wp_privacy_anonymize_ip( $client_ip, true );
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if ( $is_ipv6 && $is_ipv4 ) {
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// IPv6 compatibility mode, temporarily strip the IPv6 part, and treat it like IPv4.
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$ip_prefix = '::ffff:';
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$client_ip = preg_replace( '/^\[?[0-9a-f:]*:/i', '', $client_ip );
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$client_ip = str_replace( ']', '', $client_ip );
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$is_ipv6 = false;
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}
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if ( $is_ipv6 ) {
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// IPv6 addresses will always be enclosed in [] if there's a port.
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$ip_start = 1;
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$ip_end = (int) strpos( $client_ip, ']' ) - 1;
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$netmask = 'ffff:ffff:ffff:ffff:0000:0000:0000:0000';
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// Strip the port (and [] from IPv6 addresses), if they exist.
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if ( $ip_end > 0 ) {
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$client_ip = substr( $client_ip, $ip_start, $ip_end );
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}
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// Partially anonymize the IP by reducing it to the corresponding network ID.
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if ( function_exists( 'inet_pton' ) && function_exists( 'inet_ntop' ) ) {
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$client_ip = inet_ntop( inet_pton( $client_ip ) & inet_pton( $netmask ) );
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}
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} elseif ( $is_ipv4 ) {
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// Strip any port and partially anonymize the IP.
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$last_octet_position = strrpos( $client_ip, '.' );
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$client_ip = substr( $client_ip, 0, $last_octet_position ) . '.0';
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} else {
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if ( '0.0.0.0' === $anon_ip || '::' === $anon_ip ) {
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return false;
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}
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// Restore the IPv6 prefix to compatibility mode addresses.
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return $ip_prefix . $client_ip;
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return $anon_ip;
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}
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/**
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@ -5816,3 +5816,121 @@ All at ###SITENAME###
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$site_name
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), $email_change_email['message'], $email_change_email['headers'] );
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}
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/**
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* Return an anonymized IPv4 or IPv6 address.
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*
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* @since 4.9.6 Abstracted from `WP_Community_Events::get_unsafe_client_ip()`.
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*
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* @param string $ip_addr The IPv4 or IPv6 address to be anonymized.
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* @param bool $ipv6_fallback Optional. Whether to return the original IPv6 address if the needed functions
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* to anonymize it are not present. Default false, return `::` (unspecified address).
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* @return string The anonymized IP address.
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*/
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function wp_privacy_anonymize_ip( $ip_addr, $ipv6_fallback = false ) {
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// Detect what kind of IP address this is.
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$ip_prefix = '';
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$is_ipv6 = substr_count( $ip_addr, ':' ) > 1;
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$is_ipv4 = ( 3 === substr_count( $ip_addr, '.' ) );
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if ( $is_ipv6 && $is_ipv4 ) {
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// IPv6 compatibility mode, temporarily strip the IPv6 part, and treat it like IPv4.
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$ip_prefix = '::ffff:';
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$ip_addr = preg_replace( '/^\[?[0-9a-f:]*:/i', '', $ip_addr );
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$ip_addr = str_replace( ']', '', $ip_addr );
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$is_ipv6 = false;
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}
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if ( $is_ipv6 ) {
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// IPv6 addresses will always be enclosed in [] if there's a port.
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$left_bracket = strpos( $ip_addr, '[' );
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$right_bracket = strpos( $ip_addr, ']' );
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$percent = strpos( $ip_addr, '%' );
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$netmask = 'ffff:ffff:ffff:ffff:0000:0000:0000:0000';
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// Strip the port (and [] from IPv6 addresses), if they exist.
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if ( false !== $left_bracket && false !== $right_bracket ) {
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$ip_addr = substr( $ip_addr, $left_bracket + 1, $right_bracket - $left_bracket - 1 );
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} elseif ( false !== $left_bracket || false !== $right_bracket ) {
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// The IP has one bracket, but not both, so it's malformed.
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return '::';
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}
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// Strip the reachability scope.
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if ( false !== $percent ) {
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$ip_addr = substr( $ip_addr, 0, $percent );
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}
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// No invalid characters should be left.
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if ( preg_match( '/[^0-9a-f:]/i', $ip_addr ) ) {
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return '::';
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}
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// Partially anonymize the IP by reducing it to the corresponding network ID.
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if ( function_exists( 'inet_pton' ) && function_exists( 'inet_ntop' ) ) {
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$ip_addr = inet_ntop( inet_pton( $ip_addr ) & inet_pton( $netmask ) );
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if ( false === $ip_addr) {
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return '::';
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}
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} elseif ( ! $ipv6_fallback ) {
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return '::';
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}
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} elseif ( $is_ipv4 ) {
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// Strip any port and partially anonymize the IP.
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$last_octet_position = strrpos( $ip_addr, '.' );
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$ip_addr = substr( $ip_addr, 0, $last_octet_position ) . '.0';
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} else {
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return '0.0.0.0';
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}
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// Restore the IPv6 prefix to compatibility mode addresses.
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return $ip_prefix . $ip_addr;
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}
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/**
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* Return uniform "anonymous" data by type.
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*
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* @since 4.9.6
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*
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* @param string $type The type of data to be anonymized.
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* @param string $data Optional The data to be anonymized.
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* @return string The anonymous data for the requested type.
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*/
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function wp_privacy_anonymize_data( $type, $data = '' ) {
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switch ( $type ) {
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case 'email':
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$anonymous = 'deleted@site.invalid';
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break;
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case 'url':
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$anonymous = 'https://site.invalid';
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break;
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case 'ip':
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$anonymous = wp_privacy_anonymize_ip( $data );
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break;
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case 'date':
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$anonymous = '0000-00-00 00:00:00';
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break;
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case 'text':
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/* translators: deleted text */
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$anonymous = __( '[deleted]' );
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break;
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case 'longtext':
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/* translators: deleted long text */
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$anonymous = __( 'This content was deleted by the author.' );
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break;
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default:
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$anonymous = '';
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}
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/**
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* Filters the anonymous data for each type.
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*
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* @since 4.9.6
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*
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* @param string $anonymous Anonymized data.
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* @param string $type Type of the data.
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* @param string $data Original data.
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*/
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return apply_filters( 'wp_privacy_anonymize_data', $anonymous, $type, $data );
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}
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@ -4,7 +4,7 @@
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*
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* @global string $wp_version
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*/
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$wp_version = '4.9.6-alpha-43080';
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$wp_version = '4.9.6-alpha-43082';
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/**
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* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
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