| 1 |
<?php |
| 2 |
|
| 3 |
namespace WP_Defender\Traits; |
| 4 |
|
| 5 |
use WP_Defender\Extra\IP_Helper; |
| 6 |
|
| 7 |
trait IP { |
| 8 |
/** |
| 9 |
* @param $ip |
| 10 |
* |
| 11 |
* @return mixed |
| 12 |
*/ |
| 13 |
private function is_v4( $ip ) { |
| 14 |
return filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 ); |
| 15 |
} |
| 16 |
|
| 17 |
/** |
| 18 |
* @param $ip |
| 19 |
* |
| 20 |
* @return mixed |
| 21 |
*/ |
| 22 |
private function is_v6( $ip ) { |
| 23 |
return filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6 ); |
| 24 |
} |
| 25 |
|
| 26 |
/** |
| 27 |
* @return bool |
| 28 |
*/ |
| 29 |
private function is_v6_support() { |
| 30 |
return defined( 'AF_INET6' ); |
| 31 |
} |
| 32 |
|
| 33 |
/** |
| 34 |
* @param $ip |
| 35 |
* |
| 36 |
* @return bool|string |
| 37 |
*/ |
| 38 |
private function expand_ip_v6( $ip ) { |
| 39 |
$hex = unpack( 'H*hex', inet_pton( $ip ) ); |
| 40 |
$ip = substr( preg_replace( '/([A-f0-9]{4})/', '$1:', $hex['hex'] ), 0, - 1 ); |
| 41 |
|
| 42 |
return $ip; |
| 43 |
} |
| 44 |
|
| 45 |
/** |
| 46 |
* @param $inet |
| 47 |
* |
| 48 |
* @src https://stackoverflow.com/a/7951507 |
| 49 |
* @return string |
| 50 |
*/ |
| 51 |
private function ine_to_bits( $inet ) { |
| 52 |
$unpacked = unpack( 'a16', $inet ); |
| 53 |
$unpacked = str_split( $unpacked[1] ); |
| 54 |
$binaryip = ''; |
| 55 |
foreach ( $unpacked as $char ) { |
| 56 |
$binaryip .= str_pad( decbin( ord( $char ) ), 8, '0', STR_PAD_LEFT ); |
| 57 |
} |
| 58 |
|
| 59 |
return $binaryip; |
| 60 |
} |
| 61 |
|
| 62 |
/** |
| 63 |
* @param $ip |
| 64 |
* @param $first_in_range |
| 65 |
* @param $last_in_range |
| 66 |
* |
| 67 |
* @return bool |
| 68 |
*/ |
| 69 |
private function compare_v4_in_range( $ip, $first_in_range, $last_in_range ) { |
| 70 |
$low = sprintf( '%u', ip2long( $first_in_range ) ); |
| 71 |
$high = sprintf( '%u', ip2long( $last_in_range ) ); |
| 72 |
|
| 73 |
$cip = sprintf( '%u', ip2long( $ip ) ); |
| 74 |
if ( $high >= $cip && $cip >= $low ) { |
| 75 |
return true; |
| 76 |
} |
| 77 |
|
| 78 |
return false; |
| 79 |
} |
| 80 |
|
| 81 |
/** |
| 82 |
* @param $ip |
| 83 |
* @param $first_in_range |
| 84 |
* @param $last_in_range |
| 85 |
* |
| 86 |
* @return bool |
| 87 |
*/ |
| 88 |
private function compare_v6_in_range( $ip, $first_in_range, $last_in_range ) { |
| 89 |
$first_in_range = inet_pton( $this->expand_ip_v6( $first_in_range ) ); |
| 90 |
$last_in_range = inet_pton( $this->expand_ip_v6( $last_in_range ) ); |
| 91 |
$ip = inet_pton( $this->expand_ip_v6( $ip ) ); |
| 92 |
|
| 93 |
if ( ( strlen( $ip ) === strlen( $first_in_range ) ) |
| 94 |
&& ( $ip >= $first_in_range && $ip <= $last_in_range ) ) { |
| 95 |
return true; |
| 96 |
} else { |
| 97 |
return false; |
| 98 |
} |
| 99 |
} |
| 100 |
|
| 101 |
/** |
| 102 |
* @param $ip |
| 103 |
* @param $block |
| 104 |
* |
| 105 |
* @src http://stackoverflow.com/a/594134 |
| 106 |
* @return bool |
| 107 |
*/ |
| 108 |
private function compare_cidrv4( $ip, $block ) { |
| 109 |
[$subnet, $bits] = explode( '/', $block ); |
| 110 |
if ( is_null( $bits ) ) { |
| 111 |
$bits = 32; |
| 112 |
} |
| 113 |
$ip = ip2long( $ip ); |
| 114 |
$subnet = ip2long( $subnet ); |
| 115 |
$mask = - 1 << ( 32 - $bits ); |
| 116 |
$subnet &= $mask;// nb: in case the supplied subnet wasn't correctly aligned |
| 117 |
|
| 118 |
return ( $ip & $mask ) == $subnet;// phpcs:ignore |
| 119 |
} |
| 120 |
|
| 121 |
/** |
| 122 |
* @param $ip |
| 123 |
* @param $block |
| 124 |
* |
| 125 |
* @return bool |
| 126 |
*/ |
| 127 |
private function compare_cidrv6( $ip, $block ) { |
| 128 |
$ip = $this->expand_ip_v6( $ip ); |
| 129 |
$ip = inet_pton( $ip ); |
| 130 |
$b_ip = $this->ine_to_bits( $ip ); |
| 131 |
[$subnet, $bits] = explode( '/', $block ); |
| 132 |
$subnet = $this->expand_ip_v6( $subnet ); |
| 133 |
$subnet = inet_pton( $subnet ); |
| 134 |
$b_subnet = $this->ine_to_bits( $subnet ); |
| 135 |
|
| 136 |
$ip_net_bits = substr( $b_ip, 0, $bits ); |
| 137 |
$subnet_bits = substr( $b_subnet, 0, $bits ); |
| 138 |
|
| 139 |
return $ip_net_bits === $subnet_bits; |
| 140 |
} |
| 141 |
|
| 142 |
/** |
| 143 |
* Compare ip2 to ip1, true if ip2>ip1, false if not. |
| 144 |
* |
| 145 |
* @param $ip1 |
| 146 |
* @param $ip2 |
| 147 |
* |
| 148 |
* @return bool |
| 149 |
*/ |
| 150 |
public function compare_ip( $ip1, $ip2 ) { |
| 151 |
if ( $this->is_v4( $ip1 ) && $this->is_v4( $ip2 ) ) { |
| 152 |
if ( sprintf( '%u', ip2long( $ip2 ) ) - sprintf( '%u', ip2long( $ip1 ) ) > 0 ) { |
| 153 |
return true; |
| 154 |
} |
| 155 |
} elseif ( $this->is_v6( $ip1 ) && $this->is_v6( $ip2 ) && $this->is_v6_support() ) { |
| 156 |
$ip1 = inet_pton( $this->expand_ip_v6( $ip1 ) ); |
| 157 |
$ip2 = inet_pton( $this->expand_ip_v6( $ip2 ) ); |
| 158 |
|
| 159 |
return $ip2 > $ip1; |
| 160 |
} |
| 161 |
|
| 162 |
return false; |
| 163 |
} |
| 164 |
|
| 165 |
/** |
| 166 |
* @param $ip |
| 167 |
* @param $first_in_range |
| 168 |
* @param $last_in_range |
| 169 |
* |
| 170 |
* @return bool |
| 171 |
*/ |
| 172 |
public function compare_in_range( $ip, $first_in_range, $last_in_range ) { |
| 173 |
if ( $this->is_v4( $first_in_range ) && $this->is_v4( $last_in_range ) ) { |
| 174 |
return $this->compare_v4_in_range( $ip, $first_in_range, $last_in_range ); |
| 175 |
} elseif ( $this->is_v6( $first_in_range ) && $this->is_v6( $last_in_range ) && $this->is_v6_support() ) { |
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$this->compare_v6_in_range( $ip, $first_in_range, $last_in_range ); |
| 177 |
} |
| 178 |
|
| 179 |
return false; |
| 180 |
} |
| 181 |
|
| 182 |
public function compare_cidr( $ip, $block ) { |
| 183 |
[$subnet, $bits] = explode( '/', $block ); |
| 184 |
if ( $this->is_v4( $ip ) && $this->is_v4( $subnet ) ) { |
| 185 |
return $this->compare_cidrv4( $ip, $block ); |
| 186 |
} elseif ( $this->is_v6( $ip ) && $this->is_v6( $subnet ) && $this->is_v6_support() ) { |
| 187 |
return $this->compare_cidrv6( $ip, $block ); |
| 188 |
} |
| 189 |
|
| 190 |
return false; |
| 191 |
} |
| 192 |
|
| 193 |
/** |
| 194 |
* $ip an be single ip, or a range like xxx.xxx.xxx.xxx - xxx.xxx.xxx.xxx or CIDR. |
| 195 |
* @param $ip |
| 196 |
* |
| 197 |
* @return bool |
| 198 |
*/ |
| 199 |
public function validate_ip( $ip ) { |
| 200 |
if ( |
| 201 |
! stristr( $ip, '-' ) |
| 202 |
&& ! stristr( $ip, '/' ) |
| 203 |
&& filter_var( $ip, FILTER_VALIDATE_IP ) ) { |
| 204 |
// Only ip, no '-', '/' symbols. |
| 205 |
return true; |
| 206 |
} elseif ( stristr( $ip, '-' ) ) { |
| 207 |
$ips = explode( '-', $ip ); |
| 208 |
foreach ( $ips as $ip_key ) { |
| 209 |
if ( ! filter_var( $ip_key, FILTER_VALIDATE_IP ) ) { |
| 210 |
return false; |
| 211 |
} |
| 212 |
} |
| 213 |
if ( $this->compare_ip( $ips[0], $ips[1] ) ) { |
| 214 |
return true; |
| 215 |
} |
| 216 |
} elseif ( stristr( $ip, '/' ) ) { |
| 217 |
[$ip, $bits] = explode( '/', $ip ); |
| 218 |
if ( filter_var( $ip, FILTER_VALIDATE_IP ) && filter_var( $bits, FILTER_VALIDATE_INT ) ) { |
| 219 |
if ( $this->is_v4( $ip ) && 0 <= $bits && $bits <= 32 ) { |
| 220 |
return true; |
| 221 |
} elseif ( $this->is_v6( $ip ) && 0 <= $bits && $bits <= 128 && $this->is_v6_support() ) { |
| 222 |
return true; |
| 223 |
} |
| 224 |
} |
| 225 |
} |
| 226 |
|
| 227 |
return false; |
| 228 |
} |
| 229 |
|
| 230 |
/** |
| 231 |
* Display a message if IP is non-valid. The cases: |
| 232 |
* 1) single IP (no '-', '/' symbols), |
| 233 |
* 2) IP range, |
| 234 |
* 3) CIDR. |
| 235 |
* Ignore cases with private, reserved ranges. |
| 236 |
* @src https://en.wikipedia.org/wiki/IPv4#Special-use_addresses |
| 237 |
* @src https://en.wikipedia.org/wiki/IPv6#Special-use_addresses |
| 238 |
* @param $ip |
| 239 |
* |
| 240 |
* @return array |
| 241 |
*/ |
| 242 |
public function display_validation_message( $ip ) { |
| 243 |
$errors = array(); |
| 244 |
// Case1: single IP. |
| 245 |
if ( |
| 246 |
! stristr( $ip, '-' ) |
| 247 |
&& ! stristr( $ip, '/' ) |
| 248 |
&& ! filter_var( $ip, FILTER_VALIDATE_IP ) ) { |
| 249 |
$errors[] = sprintf( |
| 250 |
/* translators: ... */ |
| 251 |
__( '<b>%s</b> – invalid format', 'wpdef' ), |
| 252 |
$ip |
| 253 |
); |
| 254 |
// Case2: IP range. |
| 255 |
} elseif ( stristr( $ip, '-' ) ) { |
| 256 |
$ips = explode( '-', $ip ); |
| 257 |
foreach ( $ips as $ip_key ) { |
| 258 |
if ( ! filter_var( $ip_key, FILTER_VALIDATE_IP ) ) { |
| 259 |
$errors[] = sprintf( |
| 260 |
/* translators: ... */ |
| 261 |
__( '<b>%s</b> – invalid format', 'wpdef' ), |
| 262 |
$ip_key |
| 263 |
); |
| 264 |
} |
| 265 |
} |
| 266 |
if ( ! $this->compare_ip( $ips[0], $ips[1] ) ) { |
| 267 |
$errors[] = sprintf( |
| 268 |
/* translators: ... */ |
| 269 |
__( "Can't compare <b>%s</b> with <b>%s</b>.", 'wpdef' ), |
| 270 |
$ips[1], |
| 271 |
$ips[0] |
| 272 |
); |
| 273 |
} |
| 274 |
// Case3: CIDR. |
| 275 |
} elseif ( stristr( $ip, '/' ) ) { |
| 276 |
[$ip, $bits] = explode( '/', $ip ); |
| 277 |
if ( filter_var( $ip, FILTER_VALIDATE_IP ) && filter_var( $bits, FILTER_VALIDATE_INT ) ) { |
| 278 |
if ( $this->is_v4( $ip ) && 0 <= $bits && $bits <= 32 ) { |
| 279 |
// IPv4 is correct. |
| 280 |
} elseif ( $this->is_v6( $ip ) && 0 <= $bits && $bits <= 128 && $this->is_v6_support() ) { |
| 281 |
// IPv6 is correct. |
| 282 |
} else { |
| 283 |
$errors[] = sprintf( |
| 284 |
/* translators: ... */ |
| 285 |
__( '<b>%s</b> – address out of range', 'wpdef' ), |
| 286 |
$ip |
| 287 |
); |
| 288 |
} |
| 289 |
} else { |
| 290 |
$errors[] = sprintf( |
| 291 |
/* translators: ... */ |
| 292 |
__( '<b>%s</b> – invalid format', 'wpdef' ), |
| 293 |
$ip |
| 294 |
); |
| 295 |
} |
| 296 |
} |
| 297 |
// @since 2.6.3 |
| 298 |
return apply_filters( 'wd_display_ip_validations', $errors ); |
| 299 |
} |
| 300 |
|
| 301 |
/** |
| 302 |
* Check if there are any cloudflare headers in the request. |
| 303 |
* |
| 304 |
* @return bool |
| 305 |
*/ |
| 306 |
private function is_cloudflare_request() { |
| 307 |
if ( isset( $_SERVER['HTTP_CF_CONNECTING_IP'] ) ) { |
| 308 |
return true; |
| 309 |
} |
| 310 |
if ( isset( $_SERVER['HTTP_CF_IPCOUNTRY'] ) ) { |
| 311 |
return true; |
| 312 |
} |
| 313 |
if ( isset( $_SERVER['HTTP_CF_RAY'] ) ) { |
| 314 |
return true; |
| 315 |
} |
| 316 |
if ( isset( $_SERVER['HTTP_CF_VISITOR'] ) ) { |
| 317 |
return true; |
| 318 |
} |
| 319 |
|
| 320 |
return false; |
| 321 |
} |
| 322 |
|
| 323 |
/** |
| 324 |
* We fetch the ip range here. |
| 325 |
* https://www.cloudflare.com/ips/ |
| 326 |
* |
| 327 |
* @since 2.5.0 Update the ip range. |
| 328 |
* |
| 329 |
* @return array |
| 330 |
*/ |
| 331 |
private function cloudflare_ip_ranges() { |
| 332 |
return array( |
| 333 |
array( |
| 334 |
'173.245.48.0/20', |
| 335 |
'103.21.244.0/22', |
| 336 |
'103.22.200.0/22', |
| 337 |
'103.31.4.0/22', |
| 338 |
'141.101.64.0/18', |
| 339 |
'108.162.192.0/18', |
| 340 |
'190.93.240.0/20', |
| 341 |
'188.114.96.0/20', |
| 342 |
'197.234.240.0/22', |
| 343 |
'198.41.128.0/17', |
| 344 |
'162.158.0.0/15', |
| 345 |
'172.64.0.0/13', |
| 346 |
'131.0.72.0/22', |
| 347 |
'104.16.0.0/13', |
| 348 |
'104.24.0.0/14', |
| 349 |
), |
| 350 |
array( |
| 351 |
'2400:cb00::/32', |
| 352 |
'2606:4700::/32', |
| 353 |
'2803:f800::/32', |
| 354 |
'2405:b500::/32', |
| 355 |
'2405:8100::/32', |
| 356 |
'2a06:98c0::/29', |
| 357 |
'2c0f:f248::/32', |
| 358 |
), |
| 359 |
); |
| 360 |
} |
| 361 |
|
| 362 |
/** |
| 363 |
* Check if the request is from cloudflare. If it is, we get the IP. |
| 364 |
* |
| 365 |
* @return mixed |
| 366 |
*/ |
| 367 |
private function cloudflare_ip() { |
| 368 |
if ( $this->is_cloudflare_request() ) { |
| 369 |
// This looks like it come from cloudflare, so this should contain the actual IP, |
| 370 |
// and REMOTE_ADDR contains cloudflare IP. |
| 371 |
[$cloudflare_ipv4_range, $cloudflare_ipv6_range] = $this->cloudflare_ip_ranges(); |
| 372 |
$ip_helper = new IP_Helper(); |
| 373 |
$remote_addr = isset( $_SERVER['REMOTE_ADDR'] ) ? |
| 374 |
filter_var( $_SERVER['REMOTE_ADDR'], FILTER_VALIDATE_IP ) : |
| 375 |
false; |
| 376 |
$cf_con_ip = isset( $_SERVER['HTTP_CF_CONNECTING_IP'] ) ? |
| 377 |
filter_var( $_SERVER['HTTP_CF_CONNECTING_IP'], FILTER_VALIDATE_IP ) : |
| 378 |
false; |
| 379 |
|
| 380 |
if ( $remote_addr === $cf_con_ip ) { |
| 381 |
return $cf_con_ip; |
| 382 |
} else if ( false === $remote_addr || false === $cf_con_ip ) { |
| 383 |
return false; |
| 384 |
} |
| 385 |
|
| 386 |
$is_cloudflare_proxy_ip = false; |
| 387 |
if ( $this->is_v4( $remote_addr ) ) { |
| 388 |
foreach ( $cloudflare_ipv4_range as $cf_ip ) { |
| 389 |
if ( $ip_helper->ipv4_in_range( $remote_addr, $cf_ip ) ) { |
| 390 |
$is_cloudflare_proxy_ip = true; |
| 391 |
break; |
| 392 |
} |
| 393 |
} |
| 394 |
} elseif ( $this->is_v6( $remote_addr ) ) { |
| 395 |
foreach ( $cloudflare_ipv6_range as $cf_ip ) { |
| 396 |
if ( $ip_helper->ipv6_in_range( $remote_addr, $cf_ip ) ) { |
| 397 |
$is_cloudflare_proxy_ip = true; |
| 398 |
break; |
| 399 |
} |
| 400 |
} |
| 401 |
} |
| 402 |
|
| 403 |
if ( true === $is_cloudflare_proxy_ip ) { |
| 404 |
return $cf_con_ip; |
| 405 |
} |
| 406 |
} |
| 407 |
|
| 408 |
return false; |
| 409 |
} |
| 410 |
|
| 411 |
/** |
| 412 |
* Validate IP. |
| 413 |
* @param $ip |
| 414 |
* |
| 415 |
* @return bool |
| 416 |
*/ |
| 417 |
public function check_validate_ip( $ip ) { |
| 418 |
// Validate the localhost IP address. |
| 419 |
if ( in_array( $ip, array( '127.0.0.1', '::1' ), true ) ) { |
| 420 |
return true; |
| 421 |
} |
| 422 |
|
| 423 |
$filter_flags = FILTER_FLAG_IPV4 | FILTER_FLAG_IPV6; |
| 424 |
// @since 2.4.7 |
| 425 |
if ( apply_filters( 'wp_defender_filtered_internal_ip', false ) ) { |
| 426 |
// Todo: improve display of IP log when filtering reserved or private IPv4/IPv6 ranges. |
| 427 |
$filter_flags = $filter_flags | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE; |
| 428 |
} |
| 429 |
|
| 430 |
if ( false === filter_var( $ip, FILTER_VALIDATE_IP, $filter_flags ) ) { |
| 431 |
return false; |
| 432 |
} |
| 433 |
|
| 434 |
return true; |
| 435 |
} |
| 436 |
|
| 437 |
/** |
| 438 |
* Get user IP. |
| 439 |
* |
| 440 |
* @return string |
| 441 |
*/ |
| 442 |
public function get_user_ip() { |
| 443 |
// Check if it's any cloudflare IP. |
| 444 |
$cf_ip = $this->cloudflare_ip(); |
| 445 |
if ( ! empty( $cf_ip ) && filter_var( $cf_ip, FILTER_VALIDATE_IP ) ) { |
| 446 |
return apply_filters( 'defender_user_ip', $cf_ip ); |
| 447 |
} |
| 448 |
|
| 449 |
$headers = array( |
| 450 |
'HTTP_CLIENT_IP', |
| 451 |
'HTTP_X_REAL_IP', |
| 452 |
'HTTP_X_FORWARDED_FOR', |
| 453 |
'HTTP_X_FORWARDED', |
| 454 |
'HTTP_X_CLUSTER_CLIENT_IP', |
| 455 |
'HTTP_FORWARDED_FOR', |
| 456 |
'HTTP_FORWARDED', |
| 457 |
'REMOTE_ADDR', |
| 458 |
); |
| 459 |
$ip = ''; |
| 460 |
foreach ( $headers as $key ) { |
| 461 |
if ( array_key_exists( $key, $_SERVER ) && ! empty( $_SERVER[ $key ] ) ) { |
| 462 |
$ip_array = explode( ',', $_SERVER[ $key ] ); |
| 463 |
$tmp_ip = array_shift( $ip_array ); |
| 464 |
$tmp_ip = trim( $tmp_ip ); |
| 465 |
if ( $this->check_validate_ip( $tmp_ip ) ) { |
| 466 |
$ip = $tmp_ip; |
| 467 |
break; |
| 468 |
} |
| 469 |
} |
| 470 |
} |
| 471 |
|
| 472 |
return apply_filters( 'defender_user_ip', $ip ); |
| 473 |
} |
| 474 |
} |
| 475 |
|
