mirror of
https://github.com/ezyang/htmlpurifier.git
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Commit IPv6 fix, with majoring factoring out. Thank you Feyd!
git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@284 48356398-32a2-884e-a903-53898d9a118a
This commit is contained in:
Edward Z. Yang
parent
cd0108d656
commit
1cadb08fbb
41
library/HTMLPurifier/AttrDef/Host.php
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41
library/HTMLPurifier/AttrDef/Host.php
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@ -0,0 +1,41 @@
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<?php
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require_once 'HTMLPurifier/AttrDef.php';
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require_once 'HTMLPurifier/AttrDef/IPv4.php';
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require_once 'HTMLPurifier/AttrDef/IPv6.php';
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class HTMLPurifier_AttrDef_Host extends HTMLPurifier_AttrDef
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{
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var $ipv4, $ipv6;
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function HTMLPurifier_AttrDef_Host() {
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$this->ipv4 = new HTMLPurifier_AttrDef_IPv4();
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$this->ipv6 = new HTMLPurifier_AttrDef_IPv6();
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}
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function validate($string, $config, &$context) {
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$length = strlen($string);
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if ($string === '') return '';
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if ($length > 1 && $string[0] === '[' && $string[$length-1] === ']') {
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//IPv6
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$ip = substr($string, 1, $length - 2);
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$valid = $this->ipv6->validate($ip, $config, $context);
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if ($valid === false) return false;
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return '['. $valid . ']';
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}
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$ipv4 = $this->ipv4->validate($string, $config, $context);
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if ($ipv4 !== false) return $ipv4;
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// validate a domain name here, do filtering, etc etc etc
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// We could use this, but it would break I18N domain names
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//$match = preg_match('/^[a-z0-9][\w\-\.]*[a-z0-9]$/i', $string);
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//if (!$match) return false;
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return $string;
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}
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}
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?>
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31
library/HTMLPurifier/AttrDef/IPv4.php
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31
library/HTMLPurifier/AttrDef/IPv4.php
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<?php
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require_once 'HTMLPurifier/AttrDef.php';
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// spliced from Feyd's IPv6 function (pd)
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class HTMLPurifier_AttrDef_IPv4 extends HTMLPurifier_AttrDef
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{
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// regex is public so that IPv6 can reuse it
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var $ip4;
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function HTMLPurifier_AttrDef_IPv4() {
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$oct = '(?:25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]|[0-9])'; // 0-255
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$this->ip4 = "(?:{$oct}\\.{$oct}\\.{$oct}\\.{$oct})";
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}
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function validate($aIP, $config, &$context) {
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if (preg_match('#^' . $this->ip4 . '$#s', $aIP))
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{
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return $aIP;
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}
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return false;
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}
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}
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?>
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98
library/HTMLPurifier/AttrDef/IPv6.php
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98
library/HTMLPurifier/AttrDef/IPv6.php
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@ -0,0 +1,98 @@
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<?php
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require_once 'HTMLPurifier/AttrDef/IPv4.php';
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// IPv6 by Feyd, source is in public domain
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// note that this expects the brackets to be removed from IPv6 addresses
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// extends from the IPv4 impl. so we can borrow its regex
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class HTMLPurifier_AttrDef_IPv6 extends HTMLPurifier_AttrDef_IPv4
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{
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function validate($aIP, $config, &$context) {
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$original = $aIP;
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$hex = '[0-9a-fA-F]';
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$blk = '(?:' . $hex . '{1,4})';
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$pre = '(?:/(?:12[0-8]|1[0-1][0-9]|[1-9][0-9]|[0-9]))'; // /0 - /128
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// prefix check
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if (strpos($aIP, '/') !== false)
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{
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if (preg_match('#' . $pre . '$#s', $aIP, $find))
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{
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$aIP = substr($aIP, 0, 0-strlen($find[0]));
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unset($find);
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}
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else
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{
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return false;
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}
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}
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// IPv4-compatiblity check
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if (preg_match('#(?<=:'.')' . $this->ip4 . '$#s', $aIP, $find))
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{
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$aIP = substr($aIP, 0, 0-strlen($find[0]));
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$ip = explode('.', $find[0]);
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$ip = array_map('dechex', $ip);
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$aIP .= $ip[0] . $ip[1] . ':' . $ip[2] . $ip[3];
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unset($find, $ip);
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}
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// compression check
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$aIP = explode('::', $aIP);
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$c = count($aIP);
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if ($c > 2)
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{
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return false;
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}
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elseif ($c == 2)
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{
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list($first, $second) = $aIP;
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$first = explode(':', $first);
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$second = explode(':', $second);
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if (count($first) + count($second) > 8)
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{
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return false;
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}
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while(count($first) < 8)
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{
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array_push($first, '0');
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}
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array_splice($first, 8 - count($second), 8, $second);
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$aIP = $first;
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unset($first,$second);
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}
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else
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{
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$aIP = explode(':', $aIP[0]);
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}
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$c = count($aIP);
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if ($c != 8)
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{
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return false;
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}
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// All the pieces should be 16-bit hex strings. Are they?
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foreach ($aIP as $piece)
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{
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if (!preg_match('#^[0-9a-fA-F]{4}$#s', sprintf('%04s', $piece)))
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{
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return false;
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}
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}
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return $original;
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}
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}
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?>
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@ -1,7 +1,9 @@
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<?php
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require_once 'HTMLPurifier/AttrDef.php';
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require_once 'HTMLPurifier/URIScheme.php';
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require_once 'HTMLPurifier/URISchemeRegistry.php';
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require_once 'HTMLPurifier/AttrDef/Host.php';
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HTMLPurifier_ConfigDef::define(
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'URI', 'DefaultScheme', 'http',
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@ -12,6 +14,12 @@ HTMLPurifier_ConfigDef::define(
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class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
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{
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var $host;
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function HTMLPurifier_AttrDef_URI() {
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$this->host = new HTMLPurifier_AttrDef_Host();
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}
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function validate($uri, $config, &$context) {
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// We'll write stack-based parsers later, for now, use regexps to
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@ -63,34 +71,12 @@ class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
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if ($authority !== null) {
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// define regexps
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// this stuff may need to be factored out so Email can get to it
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$HEXDIG = '[A-Fa-f0-9]';
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$unreserved = 'A-Za-z0-9-._~'; // make sure you wrap with []
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$sub_delims = '!$&\'()'; // needs []
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$pct_encoded = "%$HEXDIG$HEXDIG";
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$h16 = "{$HEXDIG}{1,4}";
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$dec_octet = '(?:25[0-5]|2[0-4]\d|1\d\d|1\d|[0-9])';
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$IPv4address = "$dec_octet.$dec_octet.$dec_octet.$dec_octet";
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$ls32 = "(?:$h16:$h16|$IPv4address)";
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$IPvFuture = "v$HEXDIG+\.[:$unreserved$sub_delims]+";
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$IPv6Address = "(?:".
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"(?:$h16:){6}$ls32" .
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"|::(?:$h16:){5}$ls32" .
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"|(?:$h16)?::(?:$h16:){4}$ls32" .
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"|(?:(?:$h16:){1}$h16)?::(?:$h16:){3}$ls32" .
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"|(?:(?:$h16:){2}$h16)?::(?:$h16:){2}$ls32" .
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"|(?:(?:$h16:){3}$h16)?::(?:$h16:){1}$ls32" .
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"|(?:(?:$h16:){4}$h16)?::$ls32" .
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"|(?:(?:$h16:){5}$h16)?::$h16" .
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"|(?:(?:$h16:){6}$h16)?::" .
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")";
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$IP_literal = "\[(?:$IPvFuture|$IPv6Address)\]";
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$r_userinfo = "(?:[$unreserved$sub_delims:]|$pct_encoded)*";
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// IPv6 is broken
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$r_authority = "/^(($r_userinfo)@)?(\[$IP_literal\]|[^:]*)(:(\d*))?/";
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$r_authority = "/^(($r_userinfo)@)?(\[[^\]]+\]|[^:]*)(:(\d*))?/";
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$matches = array();
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preg_match($r_authority, $authority, $matches);
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// overloads regexp!
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@ -104,6 +90,9 @@ class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
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if ($port < 1 || $port > 65535) $port = null;
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}
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$host = $this->host->validate($host, $config, $context);
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if ($host === false) $host = null;
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// userinfo and host are validated within the regexp
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} else {
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24
tests/HTMLPurifier/AttrDef/HostTest.php
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24
tests/HTMLPurifier/AttrDef/HostTest.php
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<?php
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require_once 'HTMLPurifier/AttrDefHarness.php';
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require_once 'HTMLPurifier/AttrDef/Host.php';
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// takes a URI formatted host and validates it
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class HTMLPurifier_AttrDef_HostTest extends HTMLPurifier_AttrDefHarness
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{
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function test() {
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$this->def = new HTMLPurifier_AttrDef_Host();
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$this->assertDef('[2001:DB8:0:0:8:800:200C:417A]'); // IPv6
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$this->assertDef('124.15.6.89'); // IPv4
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$this->assertDef('www.google.com'); // reg-name
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}
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}
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?>
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26
tests/HTMLPurifier/AttrDef/IPv4Test.php
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26
tests/HTMLPurifier/AttrDef/IPv4Test.php
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<?php
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require_once 'HTMLPurifier/AttrDefHarness.php';
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require_once 'HTMLPurifier/AttrDef/IPv4.php';
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// IPv4 test case is spliced from Feyd's IPv6 implementation
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// we ought to disallow non-routable addresses
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class HTMLPurifier_AttrDef_IPv4Test extends HTMLPurifier_AttrDefHarness
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{
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function test() {
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$this->def = new HTMLPurifier_AttrDef_IPv4();
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$this->assertDef('127.0.0.1'); // standard IPv4, loopback, non-routable
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$this->assertDef('0.0.0.0'); // standard IPv4, unspecified, non-routable
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$this->assertDef('255.255.255.255'); // standard IPv4
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$this->assertDef('300.0.0.0', false); // standard IPv4, out of range
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$this->assertDef('124.15.6.89/60', false); // standard IPv4, prefix not allowed
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$this->assertDef('', false); // nothing
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}
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}
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46
tests/HTMLPurifier/AttrDef/IPv6Test.php
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46
tests/HTMLPurifier/AttrDef/IPv6Test.php
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<?php
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require_once 'HTMLPurifier/AttrDefHarness.php';
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require_once 'HTMLPurifier/AttrDef/IPv6.php';
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// test case is from Feyd's IPv6 implementation
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// we ought to disallow non-routable addresses
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class HTMLPurifier_AttrDef_IPv6Test extends HTMLPurifier_AttrDefHarness
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{
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function test() {
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$this->def = new HTMLPurifier_AttrDef_IPv6();
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$this->assertDef('2001:DB8:0:0:8:800:200C:417A'); // unicast, full
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$this->assertDef('FF01:0:0:0:0:0:0:101'); // multicast, full
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$this->assertDef('0:0:0:0:0:0:0:1'); // loopback, full
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$this->assertDef('0:0:0:0:0:0:0:0'); // unspecified, full
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$this->assertDef('2001:DB8::8:800:200C:417A'); // unicast, compressed
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$this->assertDef('FF01::101'); // multicast, compressed
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$this->assertDef('::1'); // loopback, compressed, non-routable
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$this->assertDef('::'); // unspecified, compressed, non-routable
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$this->assertDef('0:0:0:0:0:0:13.1.68.3'); // IPv4-compatible IPv6 address, full, deprecated
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$this->assertDef('0:0:0:0:0:FFFF:129.144.52.38'); // IPv4-mapped IPv6 address, full
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$this->assertDef('::13.1.68.3'); // IPv4-compatible IPv6 address, compressed, deprecated
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$this->assertDef('::FFFF:129.144.52.38'); // IPv4-mapped IPv6 address, compressed
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$this->assertDef('2001:0DB8:0000:CD30:0000:0000:0000:0000/60'); // full, with prefix
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$this->assertDef('2001:0DB8::CD30:0:0:0:0/60'); // compressed, with prefix
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$this->assertDef('2001:0DB8:0:CD30::/60'); // compressed, with prefix #2
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$this->assertDef('::/128'); // compressed, unspecified address type, non-routable
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$this->assertDef('::1/128'); // compressed, loopback address type, non-routable
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$this->assertDef('FF00::/8'); // compressed, multicast address type
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$this->assertDef('FE80::/10'); // compressed, link-local unicast, non-routable
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$this->assertDef('FEC0::/10'); // compressed, site-local unicast, deprecated
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$this->assertDef('2001:DB8:0:0:8:800:200C:417A:221', false); // unicast, full
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$this->assertDef('FF01::101::2', false); //multicast, compressed
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$this->assertDef('', false); // nothing
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}
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}
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?>
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@ -4,9 +4,12 @@ require_once 'HTMLPurifier/AttrDefHarness.php';
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require_once 'HTMLPurifier/AttrDef/URI.php';
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// WARNING: INCOMPLETE UNIT TESTS!
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// we are currently abstaining IPv6 and percent-encode fixing unit tests
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// we are currently abstaining percent-encode fixing unit tests
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// we also need to test all the configuration directives defined by this class
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// http: is returned quite often when a URL is invalid. We have to change
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// this behavior to just a plain old "FALSE"!
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class HTMLPurifier_AttrDef_URITest extends HTMLPurifier_AttrDefHarness
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{
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@ -95,8 +98,9 @@ class HTMLPurifier_AttrDef_URITest extends HTMLPurifier_AttrDefHarness
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$components[8] = array(null, '333.123.32.123', null, '/', null);
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// test IPv6 address, using amended form of RFC's example
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//$uri[9] = 'http://[2001:db8::7]/c=GB?objectClass?one';
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//$components[9] = array('[2001:db8::7]', '/c=GB', 'objectClass?one', null);
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$uri[9] = 'http://[2001:db8::7]/c=GB?objectClass?one';
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$components[9] = array(null, '[2001:db8::7]', null, '/c=GB',
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'objectClass?one');
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// We will not implement punycode encoding, that's up to the browsers
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// We also will not implement percent to IDNA encoding transformations:
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@ -109,8 +113,9 @@ class HTMLPurifier_AttrDef_URITest extends HTMLPurifier_AttrDefHarness
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$components[10] = array(null, 'tūdaliņ.lv', null, '', null);
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// test invalid IPv6 address and invalid reg-name
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//$uri[11] = 'http://[2001:0db8:85z3:08d3:1319:8a2e:0370:7334]';
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//$components[11] = array(null, '', null, null);
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$uri[11] = 'http://[2001:0db8:85z3:08d3:1319:8a2e:0370:7334]';
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$components[11] = array(null, null, null, '', null);
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$expect_uri[11] = 'http:';
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// test invalid port
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$uri[12] = 'http://example.com:foobar';
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@ -73,6 +73,9 @@ $test_files[] = 'AttrDef/PercentageTest.php';
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$test_files[] = 'AttrDef/MultipleTest.php';
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$test_files[] = 'AttrDef/TextDecorationTest.php';
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$test_files[] = 'AttrDef/FontFamilyTest.php';
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$test_files[] = 'AttrDef/HostTest.php';
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$test_files[] = 'AttrDef/IPv4Test.php';
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$test_files[] = 'AttrDef/IPv6Test.php';
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$test_files[] = 'IDAccumulatorTest.php';
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$test_files[] = 'TagTransformTest.php';
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$test_files[] = 'AttrTransform/LangTest.php';
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