<?php
-// $Id: spam_pickup.php,v 1.20 2006/11/29 15:14:27 henoheno Exp $
-// Concept-work of spam-uri metrics
-// Copyright (C) 2006 PukiWiki Developers Team
+// $Id: spam_pickup.php,v 1.71 2009/01/04 08:56:07 henoheno Exp $
+// Copyright (C) 2006-2009 PukiWiki Developers Team
// License: GPL v2 or (at your option) any later version
+//
+// Functions for Concept-work of spam-uri metrics
+//
+// (PHP 4 >= 4.3.0): preg_match_all(PREG_OFFSET_CAPTURE): $method['uri_XXX'] related feature
+//
-error_reporting(E_ALL); // Debug purpose
+if (! defined('DOMAIN_INI_FILE')) define('DOMAIN_INI_FILE', 'domain.ini.php');
-require('spam.php');
+// ---------------------
+// URI pickup
-// Recursive array_map()
-// e.g. Sanitilze ALL values (Debug purpose): var_dump(recursive_map('htmlspecialchars', $array));
-function recursive_map($func, $array)
+// Return an array of URIs in the $string
+// [OK] http://nasty.example.org#nasty_string
+// [OK] http://nasty.example.org:80/foo/xxx#nasty_string/bar
+// [OK] ftp://nasty.example.org:80/dfsdfs
+// [OK] ftp://cnn.example.com&story=breaking_news@10.0.0.1/top_story.htm (from RFC3986)
+// Not available for: IDN(ignored)
+function uri_pickup($string = '')
{
- if (is_array($array)) {
- if (! empty($array)) {
- $array = array_map('recursive_map',
- array_fill(0, count($array), $func), $array);
+ if (! is_string($string)) return array();
+
+ $array = array();
+ preg_match_all(
+ // scheme://userinfo@host:port/path/or/pathinfo/maybefile.and?query=string#fragment
+ // Refer RFC3986 (Regex below is not strict)
+ '#(\b[a-z][a-z0-9.+-]{1,8}):[/\\\]+' . // 1: Scheme
+ '(?:' .
+ '([^\s<>"\'\[\]/\#?@]*)' . // 2: Userinfo (Username and/or password)
+ '@)?' .
+ '(' .
+ // 3: Host
+ '\[[0-9a-f:.]+\]' . '|' . // IPv6([colon-hex and dot]): RFC2732
+ '(?:[0-9]{1,3}\.){3}[0-9]{1,3}' . '|' . // IPv4(dot-decimal): 001.22.3.44
+ '[a-z0-9_-][a-z0-9_.-]+[a-z0-9_-]' . // hostname(FQDN) : foo.example.org
+ ')' .
+ '(?::([0-9]*))?' . // 4: Port
+ '((?:/+[^\s<>"\'\[\]/\#?]+)*/+)?' . // 5: Directory path
+ '([^\s<>"\'\[\]\#?]+)?' . // 6: File?
+ '(?:\?([^\s<>"\'\[\]\#]+))?' . // 7: Query string
+ '(?:\#([a-z0-9._~%!$&\'()*+,;=:@-]*))?' . // 8: Fragment
+ '#i',
+ $string, $array, PREG_SET_ORDER | PREG_OFFSET_CAPTURE
+ );
+
+ // Reformat the $array
+ static $parts = array(
+ 1 => 'scheme', 2 => 'userinfo', 3 => 'host', 4 => 'port',
+ 5 => 'path', 6 => 'file', 7 => 'query', 8 => 'fragment'
+ );
+ $default = array(0 => '', 1 => -1);
+ foreach(array_keys($array) as $uri) {
+ $_uri = & $array[$uri];
+ array_rename_keys($_uri, $parts, TRUE, $default);
+ $offset = $_uri['scheme'][1]; // Scheme's offset = URI's offset
+ foreach(array_keys($_uri) as $part) {
+ $_uri[$part] = $_uri[$part][0]; // Remove offsets
}
- } else {
- $array = $func($array);
}
+
+ foreach(array_keys($array) as $uri) {
+ $_uri = & $array[$uri];
+ if ($_uri['scheme'] === '') {
+ unset($array[$uri]); // Considererd harmless
+ continue;
+ }
+ unset($_uri[0]); // Matched string itself
+ $_uri['area']['offset'] = $offset; // Area offset for area_measure()
+ }
+
return $array;
}
-// $array[0] => $array['name']
-function array_rename_key(& $array, $from, $to, $force = FALSE, $default = '')
+// Pickupped URI array => An URI (See uri_pickup())
+// USAGE:
+// $pickups = uri_pickup('a string include some URIs');
+// $uris = array();
+// foreach (array_keys($pickups) as $key) {
+// $uris[$key] = uri_pickup_implode($pickups[$key]);
+// }
+function uri_pickup_implode($uri = array())
+{
+ if (empty($uri) || ! is_array($uri)) return NULL;
+
+ $tmp = array();
+ if (isset($uri['scheme']) && $uri['scheme'] !== '') {
+ $tmp[] = & $uri['scheme'];
+ $tmp[] = '://';
+ }
+
+ if (isset($uri['userinfo']) && $uri['userinfo'] !== '') {
+ $tmp[] = & $uri['userinfo'];
+ $tmp[] = '@';
+ } else if (isset($uri['user']) || isset($uri['pass'])) {
+ if (isset($uri['user']) && $uri['user'] !== '') {
+ $tmp[] = & $uri['user'];
+ }
+ $tmp[] = ':';
+ if (isset($uri['pass']) && $uri['pass'] !== '') {
+ $tmp[] = & $uri['pass'];
+ }
+ $tmp[] = '@';
+ }
+
+ if (isset($uri['host']) && $uri['host'] !== '') {
+ $tmp[] = & $uri['host'];
+ }
+
+ if (isset($uri['port']) && $uri['port'] !== '') {
+ $tmp[] = ':';
+ $tmp[] = & $uri['port'];
+ }
+
+ if (isset($uri['path']) && $uri['path'] !== '') {
+ $tmp[] = & $uri['path'];
+ }
+
+ if (isset($uri['file']) && $uri['file'] !== '') {
+ $tmp[] = & $uri['file'];
+ }
+
+ if (isset($uri['query']) && $uri['query'] !== '') {
+ $tmp[] = '?';
+ $tmp[] = & $uri['query'];
+ }
+
+ if (isset($uri['fragment']) && $uri['fragment'] !== '') {
+ $tmp[] = '#';
+ $tmp[] = & $uri['fragment'];
+ }
+
+ return implode('', $tmp);
+}
+
+
+// ---------------------
+// URI normalization
+
+// Normalize an array of URI arrays
+// NOTE: Give me the uri_pickup() results
+function uri_pickup_normalize(& $pickups, $destructive = TRUE, $pathfile = FALSE)
+{
+ if (! is_array($pickups)) return $pickups;
+
+ if ($destructive) {
+ foreach (array_keys($pickups) as $key) {
+ $_key = & $pickups[$key];
+ $_key['scheme'] = isset($_key['scheme']) ? scheme_normalize($_key['scheme']) : '';
+ $_key['host'] = isset($_key['host']) ? host_normalize($_key['host']) : '';
+ $_key['port'] = isset($_key['port']) ? port_normalize($_key['port'], $_key['scheme'], FALSE) : '';
+ $_key['path'] = isset($_key['path']) ? strtolower(path_normalize($_key['path'])) : '';
+ $_key['file'] = isset($_key['file']) ? file_normalize($_key['file']) : '';
+ $_key['query'] = isset($_key['query']) ? query_normalize($_key['query']) : '';
+ $_key['fragment'] = isset($_key['fragment']) ? strtolower($_key['fragment']) : '';
+ }
+ } else {
+ foreach (array_keys($pickups) as $key) {
+ $_key = & $pickups[$key];
+ $_key['scheme'] = isset($_key['scheme']) ? scheme_normalize($_key['scheme']) : '';
+ $_key['host'] = isset($_key['host']) ? strtolower($_key['host']) : '';
+ $_key['port'] = isset($_key['port']) ? port_normalize($_key['port'], $_key['scheme'], FALSE) : '';
+ $_key['path'] = isset($_key['path']) ? path_normalize($_key['path']) : '';
+ }
+ }
+
+ if ($pathfile) {
+ return uri_pickup_normalize_pathfile($pickups);
+ } else {
+ return $pickups;
+ }
+}
+
+// Normalize: 'path' + 'file' = 'path' (Similar structure using PHP's "parse_url()" function)
+// NOTE: In some case, 'file' DOES NOT mean _filename_.
+// [EXAMPLE] http://example.com/path/to/directory-accidentally-not-ended-with-slash
+function uri_pickup_normalize_pathfile(& $pickups)
+{
+ if (! is_array($pickups)) return $pickups;
+
+ foreach (array_keys($pickups) as $key) {
+ $_key = & $pickups[$key];
+ if (isset($_key['path'], $_key['file'])) {
+ $_key['path'] = $_key['path'] . $_key['file'];
+ unset($_key['file']);
+ }
+ }
+
+ return $pickups;
+}
+
+// Scheme normalization: Renaming the schemes
+// snntp://example.org => nntps://example.org
+// NOTE: Keep the static lists simple. See also port_normalize().
+function scheme_normalize($scheme = '', $abbrevs_harmfull = TRUE)
+{
+ // Abbreviations they have no intention of link
+ static $abbrevs = array(
+ 'ttp' => 'http',
+ 'ttps' => 'https',
+ );
+
+ // Aliases => normalized ones
+ static $aliases = array(
+ 'pop' => 'pop3',
+ 'news' => 'nntp',
+ 'imap4' => 'imap',
+ 'snntp' => 'nntps',
+ 'snews' => 'nntps',
+ 'spop3' => 'pop3s',
+ 'pops' => 'pop3s',
+ );
+
+ if (! is_string($scheme)) return '';
+
+ $scheme = strtolower($scheme);
+ if (isset($abbrevs[$scheme])) {
+ $scheme = $abbrevs_harmfull ? $abbrevs[$scheme] : '';
+ }
+ if (isset($aliases[$scheme])) {
+ $scheme = $aliases[$scheme];
+ }
+
+ return $scheme;
+}
+
+// Hostname normlization (Destructive)
+// www.foo => www.foo ('foo' seems TLD)
+// www.foo.bar => foo.bar
+// www.10.20 => www.10.20 (Invalid hostname)
+// NOTE:
+// 'www' is basically traditional hostname for WWW server.
+// In these case, 'www.foo.bar' MAY be identical with 'foo.bar'.
+function host_normalize($host = '')
{
- if (isset($array[$from])) {
- $array[$to] = & $array[$from];
- unset($array[$from]);
- } else if ($force) {
- $array[$to] = $default;
+ if (! is_string($host)) return '';
+
+ $host = strtolower($host);
+
+ $matches = array();
+ if (preg_match('/^www\.(.+\.[a-z]+)$/', $host, $matches)) {
+ return $matches[1];
} else {
- return FALSE;
+ return $host;
}
- return TRUE;
}
-function show_form($string)
+// Port normalization: Suppress the (redundant) default port
+// HTTP://example.org:80/ => http://example.org/
+// HTTP://example.org:8080/ => http://example.org:8080/
+// HTTPS://example.org:443/ => https://example.org/
+function port_normalize($port, $scheme, $scheme_normalize = FALSE)
{
- $base = basename(__FILE__);
- $string = htmlspecialchars($string);
- print <<< EOF
-<form action="$base" method="post">
- <textarea name="msg" rows="8" cols="80">$string</textarea><br />
- <input type="submit" name="write" value="Submit" />
-</form>
-<br/>
-EOF;
+ // Schemes that users _maybe_ want to add protocol-handlers
+ // to their web browsers. (and attackers _maybe_ want to use ...)
+ // Reference: http://www.iana.org/assignments/port-numbers
+ static $array = array(
+ // scheme => default port
+ 'ftp' => 21,
+ 'ssh' => 22,
+ 'telnet' => 23,
+ 'smtp' => 25,
+ 'tftp' => 69,
+ 'gopher' => 70,
+ 'finger' => 79,
+ 'http' => 80,
+ 'pop3' => 110,
+ 'sftp' => 115,
+ 'nntp' => 119,
+ 'imap' => 143,
+ 'irc' => 194,
+ 'wais' => 210,
+ 'https' => 443,
+ 'nntps' => 563,
+ 'rsync' => 873,
+ 'ftps' => 990,
+ 'telnets' => 992,
+ 'imaps' => 993,
+ 'ircs' => 994,
+ 'pop3s' => 995,
+ 'mysql' => 3306,
+ );
+
+ // intval() converts '0-1' to '0', so preg_match() rejects these invalid ones
+ if (! is_numeric($port) || $port < 0 || preg_match('/[^0-9]/i', $port))
+ return '';
+
+ $port = intval($port);
+ if ($scheme_normalize) $scheme = scheme_normalize($scheme);
+ if (isset($array[$scheme]) && $port == $array[$scheme])
+ $port = ''; // Ignore the defaults
+
+ return $port;
}
+// Path normalization
+// http://example.org => http://example.org/
+// http://example.org#hoge => http://example.org/#hoge
+// http://example.org/path/a/b/./c////./d => http://example.org/path/a/b/c/d
+// http://example.org/path/../../a/../back => http://example.org/back
+function path_normalize($path = '', $divider = '/', $add_root = TRUE)
+{
+ if (! is_string($divider)) return is_string($path) ? $path : '';
+
+ if ($add_root) {
+ $first_div = & $divider;
+ } else {
+ $first_div = '';
+ }
+ if (! is_string($path) || $path == '') return $first_div;
+
+ if (strpos($path, $divider, strlen($path) - strlen($divider)) === FALSE) {
+ $last_div = '';
+ } else {
+ $last_div = & $divider;
+ }
+
+ $array = explode($divider, $path);
-// ---- Show form and result
-echo basename(__FILE__) . '<br />';
-$msg = isset($_POST['msg']) ? $_POST['msg'] : '';
-show_form($msg);
-echo '<pre>';
+ // Remove paddings ('//' and '/./')
+ foreach(array_keys($array) as $key) {
+ if ($array[$key] == '' || $array[$key] == '.') {
+ unset($array[$key]);
+ }
+ }
+
+ // Remove back-tracks ('/../')
+ $tmp = array();
+ foreach($array as $value) {
+ if ($value == '..') {
+ array_pop($tmp);
+ } else {
+ array_push($tmp, $value);
+ }
+ }
+ $array = & $tmp;
+
+ if (empty($array)) {
+ return $first_div;
+ } else {
+ return $first_div . implode($divider, $array) . $last_div;
+ }
+}
+
+// DirectoryIndex normalize (Destructive and rough)
+// TODO: sample.en.ja.html.gz => sample.html
+function file_normalize($file = 'index.html.en')
+{
+ static $simple_defaults = array(
+ 'default.htm' => TRUE,
+ 'default.html' => TRUE,
+ 'default.asp' => TRUE,
+ 'default.aspx' => TRUE,
+ 'index' => TRUE, // Some system can omit the suffix
+ );
+
+ static $content_suffix = array(
+ // index.xxx, sample.xxx
+ 'htm' => TRUE,
+ 'html' => TRUE,
+ 'shtml' => TRUE,
+ 'jsp' => TRUE,
+ 'php' => TRUE,
+ 'php3' => TRUE,
+ 'php4' => TRUE,
+ 'pl' => TRUE,
+ 'py' => TRUE,
+ 'rb' => TRUE,
+ 'cgi' => TRUE,
+ 'xml' => TRUE,
+ );
+
+ static $language_suffix = array(
+ // Reference: Apache 2.0.59 'AddLanguage' default
+ 'ca' => TRUE,
+ 'cs' => TRUE, // cs
+ 'cz' => TRUE, // cs
+ 'de' => TRUE,
+ 'dk' => TRUE, // da
+ 'el' => TRUE,
+ 'en' => TRUE,
+ 'eo' => TRUE,
+ 'es' => TRUE,
+ 'et' => TRUE,
+ 'fr' => TRUE,
+ 'he' => TRUE,
+ 'hr' => TRUE,
+ 'it' => TRUE,
+ 'ja' => TRUE,
+ 'ko' => TRUE,
+ 'ltz' => TRUE,
+ 'nl' => TRUE,
+ 'nn' => TRUE,
+ 'no' => TRUE,
+ 'po' => TRUE,
+ 'pt' => TRUE,
+ 'pt-br' => TRUE,
+ 'ru' => TRUE,
+ 'sv' => TRUE,
+ 'zh-cn' => TRUE,
+ 'zh-tw' => TRUE,
+
+ // Reference: Apache 2.0.59 default 'index.html' variants
+ 'ee' => TRUE,
+ 'lb' => TRUE,
+ 'var' => TRUE,
+ );
+
+ static $charset_suffix = array(
+ // Reference: Apache 2.0.59 'AddCharset' default
+ 'iso8859-1' => TRUE, // ISO-8859-1
+ 'latin1' => TRUE, // ISO-8859-1
+ 'iso8859-2' => TRUE, // ISO-8859-2
+ 'latin2' => TRUE, // ISO-8859-2
+ 'cen' => TRUE, // ISO-8859-2
+ 'iso8859-3' => TRUE, // ISO-8859-3
+ 'latin3' => TRUE, // ISO-8859-3
+ 'iso8859-4' => TRUE, // ISO-8859-4
+ 'latin4' => TRUE, // ISO-8859-4
+ 'iso8859-5' => TRUE, // ISO-8859-5
+ 'latin5' => TRUE, // ISO-8859-5
+ 'cyr' => TRUE, // ISO-8859-5
+ 'iso-ru' => TRUE, // ISO-8859-5
+ 'iso8859-6' => TRUE, // ISO-8859-6
+ 'latin6' => TRUE, // ISO-8859-6
+ 'arb' => TRUE, // ISO-8859-6
+ 'iso8859-7' => TRUE, // ISO-8859-7
+ 'latin7' => TRUE, // ISO-8859-7
+ 'grk' => TRUE, // ISO-8859-7
+ 'iso8859-8' => TRUE, // ISO-8859-8
+ 'latin8' => TRUE, // ISO-8859-8
+ 'heb' => TRUE, // ISO-8859-8
+ 'iso8859-9' => TRUE, // ISO-8859-9
+ 'latin9' => TRUE, // ISO-8859-9
+ 'trk' => TRUE, // ISO-8859-9
+ 'iso2022-jp'=> TRUE, // ISO-2022-JP
+ 'jis' => TRUE, // ISO-2022-JP
+ 'iso2022-kr'=> TRUE, // ISO-2022-KR
+ 'kis' => TRUE, // ISO-2022-KR
+ 'iso2022-cn'=> TRUE, // ISO-2022-CN
+ 'cis' => TRUE, // ISO-2022-CN
+ 'big5' => TRUE,
+ 'cp-1251' => TRUE, // ru, WINDOWS-1251
+ 'win-1251' => TRUE, // ru, WINDOWS-1251
+ 'cp866' => TRUE, // ru
+ 'koi8-r' => TRUE, // ru, KOI8-r
+ 'koi8-ru' => TRUE, // ru, KOI8-r
+ 'koi8-uk' => TRUE, // ru, KOI8-ru
+ 'ua' => TRUE, // ru, KOI8-ru
+ 'ucs2' => TRUE, // ru, ISO-10646-UCS-2
+ 'ucs4' => TRUE, // ru, ISO-10646-UCS-4
+ 'utf8' => TRUE,
+
+ // Reference: Apache 2.0.59 default 'index.html' variants
+ 'euc-kr' => TRUE,
+ 'gb2312' => TRUE,
+ );
+
+ // May uncompress by web browsers on the fly
+ // Must be at the last of the filename
+ // Reference: Apache 2.0.59 'AddEncoding'
+ static $encoding_suffix = array(
+ 'z' => TRUE,
+ 'gz' => TRUE,
+ );
+
+ if (! is_string($file)) return '';
+ $_file = strtolower($file);
+ if (isset($simple_defaults[$_file])) return '';
+
+ // Roughly removing language/character-set/encoding suffixes
+ // References:
+ // * Apache 2 document about 'Content-negotiaton', 'mod_mime' and 'mod_negotiation'
+ // http://httpd.apache.org/docs/2.0/content-negotiation.html
+ // http://httpd.apache.org/docs/2.0/mod/mod_mime.html
+ // http://httpd.apache.org/docs/2.0/mod/mod_negotiation.html
+ // * http://www.iana.org/assignments/character-sets
+ // * RFC3066: Tags for the Identification of Languages
+ // http://www.ietf.org/rfc/rfc3066.txt
+ // * ISO 639: codes of 'language names'
+ $suffixes = explode('.', $_file);
+ $body = array_shift($suffixes);
+ if ($suffixes) {
+ // Remove the last .gz/.z
+ $last_key = end(array_keys($suffixes));
+ if (isset($encoding_suffix[$suffixes[$last_key]])) {
+ unset($suffixes[$last_key]);
+ }
+ }
+ // Cut language and charset suffixes
+ foreach($suffixes as $key => $value){
+ if (isset($language_suffix[$value]) || isset($charset_suffix[$value])) {
+ unset($suffixes[$key]);
+ }
+ }
+ if (empty($suffixes)) return $body;
-$pickup = TRUE;
+ // Index.xxx
+ $count = count($suffixes);
+ reset($suffixes);
+ $current = current($suffixes);
+ if ($body == 'index' && $count == 1 && isset($content_suffix[$current])) return '';
-// list($is_spam, $progress) = check_uri_spam($msg, array(), FALSE);
-list($is_spam, $progress) = check_uri_spam(array('a', $msg, 'b'), array(), FALSE);
-if ($is_spam) {
- $action = 'Blocked by: ' . summarize_check_uri_spam_progress($progress);
- var_dump($action);
+ return $file;
}
-var_dump('check_uri_spam($msg)', $progress);
+// Sort query-strings if possible (Destructive and rough)
+// [OK] &&&&f=d&b&d&c&a=0dd => a=0dd&b&c&d&f=d
+// [OK] nothing==&eg=dummy&eg=padding&eg=foobar => eg=foobar
+function query_normalize($string = '', $equal = TRUE, $equal_cutempty = TRUE, $stortolower = TRUE)
+{
+ if (! is_string($string)) return '';
+ if ($stortolower) $string = strtolower($string);
+
+ $array = explode('&', $string);
+
+ // Remove '&' paddings
+ foreach(array_keys($array) as $key) {
+ if ($array[$key] == '') {
+ unset($array[$key]);
+ }
+ }
+
+ // Consider '='-sepalated input and paddings
+ if ($equal) {
+ $equals = $not_equals = array();
+ foreach ($array as $part) {
+ if (strpos($part, '=') === FALSE) {
+ $not_equals[] = $part;
+ } else {
+ list($key, $value) = explode('=', $part, 2);
+ $value = ltrim($value, '=');
+ if (! $equal_cutempty || $value != '') {
+ $equals[$key] = $value;
+ }
+ }
+ }
+
+ $array = & $not_equals;
+ foreach ($equals as $key => $value) {
+ $array[] = $key . '=' . $value;
+ }
+ unset($equals);
+ }
+
+ natsort($array);
+ return implode('&', $array);
+}
+
+// ---------------------
+// Area pickup
+
+// Pickup all of markup areas
+function area_pickup($string = '', $method = array())
+{
+ $area = array();
+ if (empty($method)) return $area;
+
+ // Anchor tag pair by preg_match and preg_match_all()
+ // [OK] <a href></a>
+ // [OK] <a href= >Good site!</a>
+ // [OK] <a href= "#" >test</a>
+ // [OK] <a href="http://nasty.example.com">visit http://nasty.example.com/</a>
+ // [OK] <a href=\'http://nasty.example.com/\' >discount foobar</a>
+ // [NG] <a href="http://ng.example.com">visit http://ng.example.com _not_ended_
+ $regex = '#<a\b[^>]*\bhref\b[^>]*>.*?</a\b[^>]*(>)#is';
+ if (isset($method['area_anchor'])) {
+ $areas = array();
+ $count = isset($method['asap']) ?
+ preg_match($regex, $string) :
+ preg_match_all($regex, $string, $areas);
+ if (! empty($count)) $area['area_anchor'] = $count;
+ }
+ if (isset($method['uri_anchor'])) {
+ $areas = array();
+ preg_match_all($regex, $string, $areas, PREG_SET_ORDER | PREG_OFFSET_CAPTURE);
+ foreach(array_keys($areas) as $_area) {
+ $areas[$_area] = array(
+ $areas[$_area][0][1], // Area start (<a href>)
+ $areas[$_area][1][1], // Area end (</a>)
+ );
+ }
+ if (! empty($areas)) $area['uri_anchor'] = $areas;
+ }
+
+ // phpBB's "BBCode" pair by preg_match and preg_match_all()
+ // [OK] [url][/url]
+ // [OK] [url]http://nasty.example.com/[/url]
+ // [OK] [link]http://nasty.example.com/[/link]
+ // [OK] [url=http://nasty.example.com]visit http://nasty.example.com/[/url]
+ // [OK] [link http://nasty.example.com/]buy something[/link]
+ $regex = '#\[(url|link|img|email)\b[^\]]*\].*?\[/\1\b[^\]]*(\])#is';
+ if (isset($method['area_bbcode'])) {
+ $areas = array();
+ $count = isset($method['asap']) ?
+ preg_match($regex, $string) :
+ preg_match_all($regex, $string, $areas, PREG_SET_ORDER);
+ if (! empty($count)) $area['area_bbcode'] = $count;
+ }
+ if (isset($method['uri_bbcode'])) {
+ $areas = array();
+ preg_match_all($regex, $string, $areas, PREG_SET_ORDER | PREG_OFFSET_CAPTURE);
+ foreach(array_keys($areas) as $_area) {
+ $areas[$_area] = array(
+ $areas[$_area][0][1], // Area start ([url])
+ $areas[$_area][2][1], // Area end ([/url])
+ );
+ }
+ if (! empty($areas)) $area['uri_bbcode'] = $areas;
+ }
+
+ // Various Wiki syntax
+ // [text_or_uri>text_or_uri]
+ // [text_or_uri:text_or_uri]
+ // [text_or_uri|text_or_uri]
+ // [text_or_uri->text_or_uri]
+ // [text_or_uri text_or_uri] // MediaWiki
+ // MediaWiki: [http://nasty.example.com/ visit http://nasty.example.com/]
+
+ return $area;
+}
+
+// If in doubt, it's a little doubtful
+// if (Area => inside <= Area) $brief += -1
+function area_measure($areas, & $array, $belief = -1, $a_key = 'area', $o_key = 'offset')
+{
+ if (! is_array($areas) || ! is_array($array)) return;
+
+ $areas_keys = array_keys($areas);
+ foreach(array_keys($array) as $u_index) {
+ $offset = isset($array[$u_index][$o_key]) ?
+ intval($array[$u_index][$o_key]) : 0;
+ foreach($areas_keys as $a_index) {
+ if (isset($array[$u_index][$a_key])) {
+ $offset_s = intval($areas[$a_index][0]);
+ $offset_e = intval($areas[$a_index][1]);
+ // [Area => inside <= Area]
+ if ($offset_s < $offset && $offset < $offset_e) {
+ $array[$u_index][$a_key] += $belief;
+ }
+ }
+ }
+ }
+}
+
+
+// ---------------------
+// Spam-uri pickup
+
+// Preprocess: Removing/Modifying uninterest part for URI detection
+function spam_uri_removing_hocus_pocus($binary = '', $method = array())
+{
+ $from = $to = array();
+
+ // Remove sequential spaces and too short lines
+ $length = 4 ; // 'http'(1) and '://'(2) and 'fqdn'(1)
+ if (is_array($method)) {
+ // '<a'(2) or 'href='(5) or '>'(1) or '</a>'(4)
+ // '[uri'(4) or ']'(1) or '[/uri]'(6)
+ if (isset($method['area_anchor']) || isset($method['uri_anchor']) ||
+ isset($method['area_bbcode']) || isset($method['uri_bbcode']))
+ $length = 1; // Seems not effective
+ }
+ $binary = strings($binary, $length, TRUE, FALSE); // Multibyte NOT needed
+
+ // Remove/Replace quoted-spaces within tags
+ $from[] = '#(<\w+ [^<>]*?\w ?= ?")([^"<>]*? [^"<>]*)("[^<>]*?>)#ie';
+ $to[] = "'$1' . str_replace(' ' , '%20' , trim('$2')) . '$3'";
+
+ // Remove words (has no '<>[]:') between spaces
+ $from[] = '/[ \t][\w.,()\ \t]+[ \t]/';
+ $to[] = ' ';
+
+ return preg_replace($from, $to, $binary);
+}
+
+// Preprocess: Domain exposure callback (See spam_uri_pickup_preprocess())
+// http://victim.example.org/?foo+site:nasty.example.com+bar
+// => http://nasty.example.com/?refer=victim.example.org
+// NOTE: 'refer=' is not so good for (at this time).
+// Consider about using IP address of the victim, try to avoid that.
+function _preg_replace_callback_domain_exposure($matches = array())
+{
+ $result = '';
+
+ // Preserve the victim URI as a complicity or ...
+ if (isset($matches[5])) {
+ $result =
+ $matches[1] . '://' . // scheme
+ $matches[2] . '/' . // victim.example.org
+ $matches[3]; // The rest of all (before victim)
+ }
+
+ // Flipped URI
+ if (isset($matches[4])) {
+ $result =
+ $matches[1] . '://' . // scheme
+ $matches[4] . // nasty.example.com
+ '/?refer=' . strtolower($matches[2]) . // victim.example.org
+ ' ' . $result;
+ }
+
+ return $result;
+}
+
+// Preprocess: minor-rawurldecode() and adding space(s) and something
+// to detect/count some URIs _if possible_
+// NOTE: It's maybe danger to var_dump(result). [e.g. 'javascript:']
+// [OK] http://victim.example.org/?site:nasty.example.org
+// [OK] http://victim.example.org/nasty.example.org
+// [OK] http://victim.example.org/go?http%3A%2F%2Fnasty.example.org
+// [OK] http://victim.example.org/http://nasty.example.org
+function spam_uri_pickup_preprocess($string = '', $method = array())
+{
+ if (! is_string($string)) return '';
+
+ // rawurldecode(), just to catch encoded 'http://path/to/file', not to change '%20' to ' '
+ $string = strtr(
+ $string,
+ array(
+ '%3A' => ':',
+ '%3a' => ':',
+ '%2F' => '/',
+ '%2f' => '/',
+ '%5C' => '\\',
+ '%5c' => '\\',
+ )
+ );
+
+ $string = spam_uri_removing_hocus_pocus($string, $method);
+
+ // Domain exposure (simple)
+ // http://victim.example.org/nasty.example.org/path#frag
+ // => http://nasty.example.org/?refer=victim.example.org and original
+ $string = preg_replace(
+ '#h?ttp://' .
+ '(' .
+ 'a9\.com/' . '|' .
+ 'aboutus\.org/' . '|' .
+ 'alexa\.com/data/details\?url=' . '|' .
+ 'ime\.(?:nu|st)/' . '|' . // 2ch.net
+ 'link\.toolbot\.com/' . '|' .
+ 'urlx\.org/' . '|' .
+ 'big5.51job.com/gate/big5/' . '|' .
+ 'big5.china.com/gate/big5/' . '|' .
+ 'big5.shippingchina.com:8080/' . '|' .
+ 'big5.xinhuanet.com/gate/big5/' . '|' .
+ 'bhomiyo.com/en.xliterate/' . '|' .
+ 'google.com/translate_c\?u=(?:http://)?' . '|' .
+ 'web.archive.org/web/2[^/]*/(?:http://)?' . '|' .
+ 'technorati.com/blogs/' .
+ ')' .
+ '([a-z0-9.%_-]+\.[a-z0-9.%_-]+)' . // nasty.example.org
+ '#i',
+ 'http://$2/?refer=$1 $0', // Preserve $0 or remove?
+ $string
+ );
+
+ // Domain exposure (site:) See _preg_replace_callback_domain_exposure()
+ $string = preg_replace_callback(
+ array(
+ '#(h?ttp)://' . // 1:Scheme
+ // 2:Host
+ '(' .
+ '(?:[a-z0-9_.-]+\.)?[a-z0-9_-]+\.[a-z0-9_-]+' .
+ // Something Google: http://www.google.com/supported_domains
+ // AltaVista: http://es.altavista.com/web/results?q=site%3Anasty.example.org+foobar
+ // Live Search: search.live.com
+ // MySpace: http://sads.myspace.com/Modules/Search/Pages/Search.aspx?_snip_&searchString=site:nasty.example.org
+ // (also searchresults.myspace.com)
+ // alltheweb.com
+ // search.bbc.co.uk
+ // search.orange.co.uk
+ // ...
+ ')' .
+ '/' .
+ //TODO: Specify URL-enable characters
+ '([a-z0-9?=&.,%_/\'\\\+-]+)' . // 3:path/?query=foo+bar+
+ '(?:\b|%20)site:([a-z0-9.%_-]+\.[a-z0-9.%_-]+)' . // 4:site:nasty.example.com
+ '()' . // 5:Preserve or remove?
+ '#i',
+ ),
+ '_preg_replace_callback_domain_exposure',
+ $string
+ );
+
+ // URI exposure (uriuri => uri uri)
+ $string = preg_replace(
+ array(
+ '#(?<! )(?:https?|ftp):/#i',
+ // '#[a-z][a-z0-9.+-]{1,8}://#i',
+ // '#[a-z][a-z0-9.+-]{1,8}://#i'
+ ),
+ ' $0',
+ $string
+ );
+
+ return $string;
+}
+
+// Main function of spam-uri pickup,
+// A wrapper function of uri_pickup()
+function spam_uri_pickup($string = '', $method = array())
+{
+ if (! is_array($method) || empty($method)) {
+ $method = check_uri_spam_method();
+ }
+
+ $string = spam_uri_pickup_preprocess($string, $method);
+
+ $array = uri_pickup($string);
+
+ // Area elevation of URIs, for '(especially external)link' intension
+ if (! empty($array)) {
+ $_method = array();
+ if (isset($method['uri_anchor'])) $_method['uri_anchor'] = & $method['uri_anchor'];
+ if (isset($method['uri_bbcode'])) $_method['uri_bbcode'] = & $method['uri_bbcode'];
+ $areas = area_pickup($string, $_method, TRUE);
+ if (! empty($areas)) {
+ $area_shadow = array();
+ foreach (array_keys($array) as $key) {
+ $area_shadow[$key] = & $array[$key]['area'];
+ foreach (array_keys($_method) as $_key) {
+ $area_shadow[$key][$_key] = 0;
+ }
+ }
+ foreach (array_keys($_method) as $_key) {
+ if (isset($areas[$_key])) {
+ area_measure($areas[$_key], $area_shadow, 1, $_key);
+ }
+ }
+ }
+ }
+
+ // Remove 'offset's for area_measure()
+ foreach(array_keys($array) as $key) {
+ unset($array[$key]['area']['offset']);
+ }
+
+ return $array;
+}
+
+// Rough hostname checker
+// TODO: Strict digit, 0x, CIDR, '999.999.999.999', ':', '::G'
+function is_ip($string = '')
+{
+ if (! is_string($string)) return FALSE;
+
+ if (strpos($string, ':') !== FALSE) {
+ return 6; // Seems IPv6
+ }
+
+ if (preg_match('/^' .
+ '(?:[0-9]{1,3}\.){3}[0-9]{1,3}' . '|' .
+ '(?:[0-9]{1,3}\.){1,3}' . '$/',
+ $string)) {
+ return 4; // Seems IPv4(dot-decimal)
+ }
+
+ return FALSE; // Seems not IP
+}
+
+// Check responsibility-root of the FQDN
+// 'foo.bar.example.com' => 'example.com' (.com has the last whois for it)
+// 'foo.bar.example.au' => 'example.au' (.au has the last whois for it)
+// 'foo.bar.example.edu.au' => 'example.edu.au' (.edu.au has the last whois for it)
+// 'foo.bar.example.act.edu.au' => 'example.act.edu.au' (.act.edu.au has the last whois for it)
+function whois_responsibility($fqdn = 'foo.bar.example.com', $parent = FALSE, $implicit = TRUE)
+{
+ static $domain;
+
+ if ($fqdn === NULL) {
+ $domain = NULL; // Unset
+ return '';
+ }
+ if (! is_string($fqdn)) return '';
+
+ if (is_ip($fqdn)) return $fqdn;
+
+ if (! isset($domain)) {
+ $domain = array();
+ if (file_exists(DOMAIN_INI_FILE)) {
+ include(DOMAIN_INI_FILE); // Set
+ }
+ }
+
+ $result = array();
+ $dcursor = & $domain;
+ $array = array_reverse(explode('.', $fqdn));
+ $i = 0;
+ while(TRUE) {
+ if (! isset($array[$i])) break;
+ $acursor = $array[$i];
+ if (is_array($dcursor) && isset($dcursor[$acursor])) {
+ $result[] = & $array[$i];
+ $dcursor = & $dcursor[$acursor];
+ } else {
+ if (! $parent && isset($acursor)) {
+ $result[] = & $array[$i]; // Whois servers must know this subdomain
+ }
+ break;
+ }
+ ++$i;
+ }
+
+ // Implicit responsibility: Top-Level-Domains must not be yours
+ // 'bar.foo.something' => 'foo.something'
+ if ($implicit && count($result) == 1 && count($array) > 1) {
+ $result[] = & $array[1];
+ }
-if ($pickup) {
- $results = spam_uri_pickup($msg);
- var_dump('$results', $results);
+ return $result ? implode('.', array_reverse($result)) : '';
}
-echo '</pre>';
?>
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