File: /var/www/html/wpmuhibbah_err/wp-content/plugins/defender-security/src/extra/ip-helper.php
<?php
namespace WP_Defender\Extra;
/*
* ip_in_range.php - Function to determine if an IP is located in a
* specific range as specified via several alternative
* formats.
*
* Network ranges can be specified as:
* 1. Wildcard format: 1.2.3.*
* 2. CIDR format: 1.2.3/24 OR 1.2.3.4/255.255.255.0
* 3. Start-End IP format: 1.2.3.0-1.2.3.255
*
* Return value BOOLEAN : ip_in_range($ip, $range);
*
* Copyright 2008: Paul Gregg <pgregg@pgregg.com>
* 10 January 2008
* Version: 1.2
*
* Source website: http://www.pgregg.com/projects/php/ip_in_range/
* Version 1.2
*
* This software is Donationware - if you feel you have benefited from
* the use of this tool then please consider a donation. The value of
* which is entirely left up to your discretion.
* http://www.pgregg.com/donate/
*
* Please do not remove this header, or source attibution from this file.
*/
/*
* Modified by James Greene <james@cloudflare.com> to include IPV6 support
* (original version only supported IPV4).
* 21 May 2012
*/
class IP_Helper {
// decbin32
// In order to simplify working with IP addresses (in binary) and their
// netmasks, it is easier to ensure that the binary strings are padded
// with zeros out to 32 characters - IP addresses are 32 bit numbers
function decbin32( $dec ) {
return str_pad( decbin( $dec ), 32, '0', STR_PAD_LEFT );
}
// ipv4_in_range
// This function takes 2 arguments, an IP address and a "range" in several
// different formats.
// Network ranges can be specified as:
// 1. Wildcard format: 1.2.3.*
// 2. CIDR format: 1.2.3/24 OR 1.2.3.4/255.255.255.0
// 3. Start-End IP format: 1.2.3.0-1.2.3.255
// The function will return true if the supplied IP is within the range.
// Note little validation is done on the range inputs - it expects you to
// use one of the above 3 formats.
function ipv4_in_range( $ip, $range ) {
if ( strpos( $range, '/' ) !== false ) {
// $range is in IP/NETMASK format
list( $range, $netmask ) = explode( '/', $range, 2 );
if ( strpos( $netmask, '.' ) !== false ) {
// $netmask is a 255.255.0.0 format
$netmask = str_replace( '*', '0', $netmask );
$netmask_dec = ip2long( $netmask );
return ( ( ip2long( $ip ) & $netmask_dec ) == ( ip2long( $range ) & $netmask_dec ) );
} else {
// $netmask is a CIDR size block
// fix the range argument
$x = explode( '.', $range );
while ( count( $x ) < 4 ) {
$x[] = '0';
}
list( $a, $b, $c, $d ) = $x;
$range = sprintf( "%u.%u.%u.%u", empty( $a ) ? '0' : $a, empty( $b ) ? '0' : $b, empty( $c ) ? '0' : $c, empty( $d ) ? '0' : $d );
$range_dec = ip2long( $range );
$ip_dec = ip2long( $ip );
# Strategy 1 - Create the netmask with 'netmask' 1s and then fill it to 32 with 0s
#$netmask_dec = bindec(str_pad('', $netmask, '1') . str_pad('', 32-$netmask, '0'));
# Strategy 2 - Use math to create it
$wildcard_dec = pow( 2, ( 32 - $netmask ) ) - 1;
$netmask_dec = ~$wildcard_dec;
return ( ( $ip_dec & $netmask_dec ) == ( $range_dec & $netmask_dec ) );
}
} else {
// range might be 255.255.*.* or 1.2.3.0-1.2.3.255
if ( strpos( $range, '*' ) !== false ) { // a.b.*.* format
// Just convert to A-B format by setting * to 0 for A and 255 for B
$lower = str_replace( '*', '0', $range );
$upper = str_replace( '*', '255', $range );
$range = "$lower-$upper";
}
if ( strpos( $range, '-' ) !== false ) { // A-B format
list( $lower, $upper ) = explode( '-', $range, 2 );
$lower_dec = (float) sprintf( "%u", ip2long( $lower ) );
$upper_dec = (float) sprintf( "%u", ip2long( $upper ) );
$ip_dec = (float) sprintf( "%u", ip2long( $ip ) );
return ( ( $ip_dec >= $lower_dec ) && ( $ip_dec <= $upper_dec ) );
}
return false;
}
}
function ip2long6( $ip ) {
if ( substr_count( $ip, '::' ) ) {
$ip = str_replace( '::', str_repeat( ':0000', 8 - substr_count( $ip, ':' ) ) . ':', $ip );
}
$ip = explode( ':', $ip );
$r_ip = '';
foreach ( $ip as $v ) {
$r_ip .= str_pad( base_convert( $v, 16, 2 ), 16, 0, STR_PAD_LEFT );
}
return base_convert( $r_ip, 2, 10 );
}
// Get the ipv6 full format and return it as a decimal value.
function get_ipv6_full( $ip ) {
$pieces = explode( "/", $ip, 2 );
$left_piece = $pieces[0];
$right_piece = $pieces[1];
// Extract out the main IP pieces
$ip_pieces = explode( "::", $left_piece, 2 );
$main_ip_piece = $ip_pieces[0];
$last_ip_piece = $ip_pieces[1];
// Pad out the shorthand entries.
$main_ip_pieces = explode( ":", $main_ip_piece );
foreach ( $main_ip_pieces as $key => $val ) {
$main_ip_pieces[ $key ] = str_pad( $main_ip_pieces[ $key ], 4, "0", STR_PAD_LEFT );
}
// Check to see if the last IP block (part after ::) is set
$last_piece = "";
$size = count( $main_ip_pieces );
if ( trim( $last_ip_piece ) != "" ) {
$last_piece = str_pad( $last_ip_piece, 4, "0", STR_PAD_LEFT );
// Build the full form of the IPV6 address considering the last IP block set
for ( $i = $size; $i < 7; $i ++ ) {
$main_ip_pieces[ $i ] = "0000";
}
$main_ip_pieces[7] = $last_piece;
} else {
// Build the full form of the IPV6 address
for ( $i = $size; $i < 8; $i ++ ) {
$main_ip_pieces[ $i ] = "0000";
}
}
// Rebuild the final long form IPV6 address
$final_ip = implode( ":", $main_ip_pieces );
return $this->ip2long6( $final_ip );
}
// Determine whether the IPV6 address is within range.
// $ip is the IPV6 address in decimal format to check if its within the IP range created by the cloudflare IPV6 address, $range_ip.
// $ip and $range_ip are converted to full IPV6 format.
// Returns true if the IPV6 address, $ip, is within the range from $range_ip. False otherwise.
function ipv6_in_range( $ip, $range_ip ) {
$pieces = explode( "/", $range_ip, 2 );
$left_piece = $pieces[0];
$right_piece = $pieces[1];
// Extract out the main IP pieces
$ip_pieces = explode( "::", $left_piece, 2 );
$main_ip_piece = $ip_pieces[0];
$last_ip_piece = $ip_pieces[1];
// Pad out the shorthand entries.
$main_ip_pieces = explode( ":", $main_ip_piece );
foreach ( $main_ip_pieces as $key => $val ) {
$main_ip_pieces[ $key ] = str_pad( $main_ip_pieces[ $key ], 4, "0", STR_PAD_LEFT );
}
// Create the first and last pieces that will denote the IPV6 range.
$first = $main_ip_pieces;
$last = $main_ip_pieces;
// Check to see if the last IP block (part after ::) is set
$last_piece = "";
$size = count( $main_ip_pieces );
if ( trim( $last_ip_piece ) != "" ) {
$last_piece = str_pad( $last_ip_piece, 4, "0", STR_PAD_LEFT );
// Build the full form of the IPV6 address considering the last IP block set
for ( $i = $size; $i < 7; $i ++ ) {
$first[ $i ] = "0000";
$last[ $i ] = "ffff";
}
$main_ip_pieces[7] = $last_piece;
} else {
// Build the full form of the IPV6 address
for ( $i = $size; $i < 8; $i ++ ) {
$first[ $i ] = "0000";
$last[ $i ] = "ffff";
}
}
// Rebuild the final long form IPV6 address
$first = $this->ip2long6( implode( ":", $first ) );
$last = $this->ip2long6( implode( ":", $last ) );
$in_range = ( $ip >= $first && $ip <= $last );
return $in_range;
}
}