<?php
-// $Id: spam.php,v 1.126 2007/03/17 06:31:24 henoheno Exp $
+// $Id: spam.php,v 1.131 2007/04/22 08:04:19 henoheno Exp $
// Copyright (C) 2006-2007 PukiWiki Developers Team
// License: GPL v2 or (at your option) any later version
//
// [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)
-function uri_pickup($string = '', $normalize = TRUE,
- $preserve_rawuri = FALSE, $preserve_chunk = TRUE)
+function uri_pickup($string = '')
{
+ if (! is_string($string)) return array();
+
// Not available for: IDN(ignored)
$array = array();
preg_match_all(
$string, $array, PREG_SET_ORDER | PREG_OFFSET_CAPTURE
);
- // Shrink $array
+ // Format the $array
static $parts = array(
1 => 'scheme', 2 => 'userinfo', 3 => 'host', 4 => 'port',
5 => 'path', 6 => 'file', 7 => 'query', 8 => 'fragment'
foreach(array_keys($array) as $uri) {
$_uri = & $array[$uri];
array_rename_keys($_uri, $parts, TRUE, $default);
-
- $offset = $_uri['scheme'][1]; // Scheme's offset
+ $offset = $_uri['scheme'][1]; // Scheme's offset = URI's offset
foreach(array_keys($_uri) as $part) {
- // Remove offsets for each part
- $_uri[$part] = & $_uri[$part][0];
+ $_uri[$part] = & $_uri[$part][0]; // Remove offsets
}
+ }
- if ($normalize) {
- $_uri['scheme'] = scheme_normalize($_uri['scheme']);
- if ($_uri['scheme'] === '') {
- unset($array[$uri]);
- continue;
- }
- $_uri['host'] = host_normalize($_uri['host']);
- $_uri['port'] = port_normalize($_uri['port'], $_uri['scheme'], FALSE);
- $_uri['path'] = path_normalize($_uri['path']);
- if ($preserve_rawuri) $_uri['rawuri'] = & $_uri[0];
-
- // DEBUG
- //$_uri['uri'] = uri_array_implode($_uri);
- } else {
- $_uri['uri'] = & $_uri[0]; // Raw
+ foreach(array_keys($array) as $uri) {
+ $_uri = & $array[$uri];
+ if ($_uri['scheme'] === '') {
+ unset($array[$uri]); // Considererd harmless
+ continue;
}
unset($_uri[0]); // Matched string itself
- if (! $preserve_chunk) {
- unset(
- $_uri['scheme'],
- $_uri['userinfo'],
- $_uri['host'],
- $_uri['port'],
- $_uri['path'],
- $_uri['file'],
- $_uri['query'],
- $_uri['fragment']
- );
- }
-
- // Area offset for area_measure()
- $_uri['area']['offset'] = $offset;
+ $_uri['area']['offset'] = $offset; // Area offset for area_measure()
}
return $array;
}
-// Destructive normalize of URI array
-// NOTE: Give me the uri_pickup() result with chunks
-function uri_array_normalize(& $pickups, $preserve = TRUE)
+// Normalize an array of URI arrays
+// NOTE: Give me the uri_pickup() results
+function uri_pickup_normalize(& $pickups, $destructive = TRUE)
{
if (! is_array($pickups)) return $pickups;
- foreach (array_keys($pickups) as $key) {
- $_key = & $pickups[$key];
- $_key['path'] = isset($_key['path']) ? strtolower($_key['path']) : '';
- $_key['file'] = isset($_key['file']) ? file_normalize($_key['file']) : '';
- $_key['query'] = isset($_key['query']) ? query_normalize(strtolower($_key['query']), TRUE) : '';
- $_key['fragment'] = (isset($_key['fragment']) && $preserve) ?
- strtolower($_key['fragment']) : ''; // Just ignore
+ 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']) : '';
+ }
}
return $pickups;
}
// An URI array => An URI (See uri_pickup())
-function uri_array_implode($uri = array())
+// 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;
return $string;
}
-// Main function of spam-uri pickup
+// Main function of spam-uri pickup,
+// A wrapper function of uri_pickup()
function spam_uri_pickup($string = '', $method = array())
{
if (! is_array($method) || empty($method)) {
// Scheme normalization: Renaming the schemes
// snntp://example.org => nntps://example.org
// NOTE: Keep the static lists simple. See also port_normalize().
-function scheme_normalize($scheme = '', $considerd_harmfull = TRUE)
+function scheme_normalize($scheme = '', $abbrevs_harmfull = TRUE)
{
- // Abbreviations considerable they don't have link intension
+ // Abbreviations they have no intention of link
static $abbrevs = array(
'ttp' => 'http',
'ttps' => 'https',
);
- // Alias => normalized
+ // Aliases => normalized ones
static $aliases = array(
'pop' => 'pop3',
'news' => 'nntp',
'pops' => 'pop3s',
);
- $scheme = strtolower(trim($scheme));
+ if (! is_string($scheme)) return '';
+
+ $scheme = strtolower($scheme);
if (isset($abbrevs[$scheme])) {
- if ($considerd_harmfull) {
- $scheme = $abbrevs[$scheme];
- } else {
- $scheme = '';
- }
+ $scheme = $abbrevs_harmfull ? $abbrevs[$scheme] : '';
+ }
+ if (isset($aliases[$scheme])) {
+ $scheme = $aliases[$scheme];
}
- if (isset($aliases[$scheme])) $scheme = $aliases[$scheme];
return $scheme;
}
-// Hostname normlization
+// Hostname normlization (Destructive)
// www.foo => www.foo ('foo' seems TLD)
// www.foo.bar => foo.bar
// www.10.20 => www.10.20 (Invalid hostname)
// 'www.foo.bar' may be identical with 'foo.bar'.
function host_normalize($host = '')
{
- $host = strtolower($host);
+ if (! is_string($host)) return '';
+ $host = strtolower($host);
$matches = array();
if (preg_match('/^www\.(.+\.[a-z]+)$/', $host, $matches)) {
return $matches[1];
// HTTP://example.org:80/ => http://example.org/
// HTTP://example.org:8080/ => http://example.org:8080/
// HTTPS://example.org:443/ => https://example.org/
-function port_normalize($port, $scheme, $scheme_normalize = TRUE)
+function port_normalize($port, $scheme, $scheme_normalize = FALSE)
{
// Schemes that users _maybe_ want to add protocol-handlers
// to their web browsers. (and attackers _maybe_ want to use ...)
'mysql' => 3306,
);
- $port = trim($port);
- if ($port === '') return $port;
+ // intval() converts '0-1' to '0', so preg_match() rejects these invalid ones
+ if (! is_numeric($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])
$port = ''; // Ignore the defaults
// http://example.org#hoge => http://example.org/#hoge
// http://example.org/path/a/b/./c////./d => http://example.org/path/a/b/c/d
// http://example.org/path/../../a/../back => http://example.org/back
-function path_normalize($path = '', $divider = '/', $addroot = TRUE)
+function path_normalize($path = '', $divider = '/', $add_root = TRUE)
{
- if (! is_string($path) || $path == '')
- return $addroot ? $divider : '';
+ if (! is_string($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;
+ }
- $path = trim($path);
- $last = ($path[strlen($path) - 1] == $divider) ? $divider : '';
$array = explode($divider, $path);
- // Remove paddings
+ // Remove paddings ('//' and '/./')
foreach(array_keys($array) as $key) {
- if ($array[$key] == '' || $array[$key] == '.')
+ if ($array[$key] == '' || $array[$key] == '.') {
unset($array[$key]);
+ }
}
- // Back-track
+
+ // Remove back-tracks ('/../')
$tmp = array();
foreach($array as $value) {
if ($value == '..') {
}
$array = & $tmp;
- $path = $addroot ? $divider : '';
- if (! empty($array)) $path .= implode($divider, $array) . $last;
-
- return $path;
+ if (empty($array)) {
+ return $first_div;
+ } else {
+ return $first_div . implode($divider, $array) . $last_div;
+ }
}
// DirectoryIndex normalize (Destructive and rough)
-function file_normalize($string = 'index.html.en')
+// TODO: sample.en.ja.html.gz => sample.html
+function file_normalize($file = 'index.html.en')
{
- static $array = array(
- 'index' => TRUE, // Some system can omit the suffix
- 'index.htm' => TRUE,
- 'index.html' => TRUE,
- 'index.shtml' => TRUE,
- 'index.jsp' => TRUE,
- 'index.php' => TRUE,
- 'index.php3' => TRUE,
- 'index.php4' => TRUE,
- //'index.pl' => TRUE,
- //'index.py' => TRUE,
- //'index.rb' => TRUE,
- 'index.cgi' => TRUE,
+ static $simple_defaults = array(
'default.htm' => TRUE,
'default.html' => TRUE,
'default.asp' => TRUE,
'default.aspx' => TRUE,
+ 'index' => TRUE, // Some system can omit the suffix
);
- // Content-negothiation filter:
- // Roughly removing ISO 639 -like
- // 2-letter suffixes (See RFC3066)
- $matches = array();
- if (preg_match('/(.+)\.[a-z][a-z](?:-[a-z][a-z])?$/i', $string, $matches)) {
- $_string = $matches[1];
- } else {
- $_string = & $string;
- }
+ static $content_suffix = array(
+ // index.xxx, sample.xxx
+ 'htm' => TRUE,
+ 'html' => TRUE,
+ 'shtml' => TRUE,
+ 'jsp' => TRUE,
+ 'php' => TRUE,
+ 'php3' => TRUE,
+ 'php4' => TRUE,
+ 'pl' => TRUE,
+ 'py' => TRUE,
+ 'rb' => TRUE,
+ 'cgi' => TRUE,
+ 'xml' => TRUE,
+ );
- if (isset($array[strtolower($_string)])) {
- return '';
- } else {
- return $string;
+ 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;
+
+ // Index.xxx
+ $count = count($suffixes);
+ reset($suffixes);
+ $current = current($suffixes);
+ if ($body == 'index' && $count == 1 && isset($content_suffix[$current])) return '';
+
+ return $file;
}
// Sort query-strings if possible (Destructive and rough)
// [OK] &&&&f=d&b&d&c&a=0dd => a=0dd&b&c&d&f=d
// [OK] nothing==&eg=dummy&eg=padding&eg=foobar => eg=foobar
-function query_normalize($string = '', $equal = FALSE, $equal_cutempty = TRUE)
+function query_normalize($string = '', $equal = TRUE, $equal_cutempty = TRUE, $stortolower = TRUE)
{
+ if (! is_string($string)) return '';
+ if ($stortolower) $string = strtolower($string);
+
$array = explode('&', $string);
// Remove '&' paddings
// 23 => ']',
);
+ if (! is_string($string)) return '';
+
$string = str_replace($from, $mid, $string); // Hide
$string = preg_quote($string, $divider);
$string = str_replace($mid, $to, $string); // Unhide
// TODO: IPv4, CIDR?, IPv6
function generate_host_regex($string = '', $divider = '/')
{
+ if (! is_string($string)) return '';
+
if (mb_strpos($string, '.') === FALSE)
return generate_glob_regex($string, $divider);
// '*.blogspot.com', // Blog services's subdomains (only)
// 'IANA-examples' => '#^(?:.*\.)?example\.(?:com|net|org)$#',
// );
- foreach(array('goodhost', 'badhost') as $_list) {
- if (! isset($blocklist[$list])) continue;
+ if (isset($blocklist['list'])) {
+ $regexs['list'] = & $blocklist['list'];
+ } else {
+ // Default
+ $blocklist['list'] = array(
+ 'goodhost' => FALSE,
+ 'badhost' => TRUE,
+ );
+ }
+ foreach(array_keys($blocklist['list']) as $_list) {
+ if (! isset($blocklist[$_list])) continue;
foreach ($blocklist[$_list] as $key => $value) {
if (is_array($value)) {
$regexs[$_list][$key] = array();
get_blocklist_add($regexs[$_list], $key, $value);
}
}
+ unset($blocklist[$_list]);
}
}
}
} else {
$array[$value] = '/^' . generate_host_regex($value, '/') . '$/i';
}
-}
+}
function is_badhost($hosts = array(), $asap = TRUE, & $remains)
{
$result = array();
if (! is_array($hosts)) $hosts = array($hosts);
foreach(array_keys($hosts) as $key) {
- if (! is_string($hosts[$key])) unset($hosts[$key]);
- }
- if (empty($hosts)) return $result;
-
- foreach (get_blocklist('goodhost') as $regex) {
- $hosts = preg_grep_invert($regex, $hosts);
+ if (! is_string($hosts[$key])) {
+ unset($hosts[$key]);
+ }
}
if (empty($hosts)) return $result;
- $tmp = array();
- foreach (get_blocklist('badhost') as $label => $regex) {
- if (is_array($regex)) {
- $result[$label] = array();
- foreach($regex as $_label => $_regex) {
- if (is_badhost_avail($_label, $_regex, $hosts, $result[$label]) && $asap) break;
+ foreach(get_blocklist('list') as $key=>$value){
+ if ($value) {
+ foreach (get_blocklist($key) as $label => $regex) {
+ if (is_array($regex)) {
+ $result[$label] = array();
+ foreach($regex as $_label => $_regex) {
+ if (is_badhost_avail($_label, $_regex, $hosts, $result[$label]) && $asap) {
+ break;
+ }
+ }
+ if (empty($result[$label])) unset($result[$label]);
+ } else {
+ if (is_badhost_avail($label, $regex, $hosts, $result) && $asap) {
+ break;
+ }
+ }
}
- if (empty($result[$label])) unset($result[$label]);
} else {
- if (is_badhost_avail($label, $regex, $hosts, $result) && $asap) break;
+ foreach (get_blocklist($key) as $regex) {
+ $hosts = preg_grep_invert($regex, $hosts);
+ }
+ if (empty($hosts)) return $result;
}
}
$remains = $hosts;
-
return $result;
}
{
$group = preg_grep($regex, $hosts);
if ($group) {
+
+ // DEBUG var_dump($group); // badhost detail
+
$result[$label] = & $group;
$hosts = array_diff($hosts, $result[$label]);
return TRUE;
if ($asap && $is_spam) return $progress;
// URI: Pickup
- $pickups = spam_uri_pickup($target, $method);
+ $pickups = uri_pickup_normalize(spam_uri_pickup($target, $method));
//$remains['uri_pickup'] = & $pickups;
// Return if ...
// URI: Uniqueness (and removing non-uniques)
if ((! $asap || ! $is_spam) && isset($method['non_uniquri'])) {
- // Destructive normalize of URIs
- uri_array_normalize($pickups);
-
$uris = array();
foreach (array_keys($pickups) as $key) {
- $uris[$key] = uri_array_implode($pickups[$key]);
+ $uris[$key] = uri_pickup_implode($pickups[$key]);
}
$count = count($uris);
$uris = array_unique($uris);
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