<?php
-// $Id: spam.php,v 1.36 2006/11/25 13:55:34 henoheno Exp $
-// Copyright (C) 2006 PukiWiki Developers Team
+// $Id: spam.php,v 1.122 2007/03/04 03:59:37 henoheno Exp $
+// Copyright (C) 2006-2007 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): $method['uri_XXX'] related feature
+
+if (! defined('SPAM_INI_FILE')) define('SPAM_INI_FILE', 'spam.ini.php');
+
+// ---------------------
+// Compat etc
+
+// (PHP 4 >= 4.2.0): var_export(): mail-reporting and dump related
+if (! function_exists('var_export')) {
+ function var_export() {
+ return 'var_export() is not found on this server' . "\n";
+ }
+}
+
+// (PHP 4 >= 4.2.0): preg_grep() enables invert option
+function preg_grep_invert($pattern = '//', $input = array())
+{
+ static $invert;
+ if (! isset($invert)) $invert = defined('PREG_GREP_INVERT');
+
+ if ($invert) {
+ return preg_grep($pattern, $input, PREG_GREP_INVERT);
+ } else {
+ $result = preg_grep($pattern, $input);
+ if ($result) {
+ return array_diff($input, preg_grep($pattern, $input));
+ } else {
+ return $input;
+ }
+ }
+}
+
+// ---------------------
+// URI pickup
// Return an array of URIs in the $string
// [OK] http://nasty.example.org#nasty_string
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
+ '#(\b[a-z][a-z0-9.+-]{1,8}):/+' . // 1: Scheme
'(?:' .
'([^\s<>"\'\[\]/\#?@]*)' . // 2: Userinfo (Username)
'@)?' .
// 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
- '[^\s<>"\'\[\]:/\#?]+' . // FQDN: foo.example.org
+ '[a-z0-9.-]+' . // hostname(FQDN) : foo.example.org
')' .
'(?::([0-9]*))?' . // 4: Port
'((?:/+[^\s<>"\'\[\]/\#]+)*/+)?' . // 5: Directory path or path-info
- '([^\s<>"\'\[\]\#]+)?' . // 6: File and query string
- '(?:\#([a-z0-9._~%!$&\'()*+,;=:@-]*))?' . // 7: Fragment
+ '([^\s<>"\'\[\]\#?]+)?' . // 6: File?
+ '(?:\?([^\s<>"\'\[\]\#]+))?' . // 7: Query string
+ '(?:\#([a-z0-9._~%!$&\'()*+,;=:@-]*))?' . // 8: Fragment
'#i',
$string, $array, PREG_SET_ORDER | PREG_OFFSET_CAPTURE
);
- //var_dump(recursive_map('htmlspecialchars', $array));
// Shrink $array
static $parts = array(
1 => 'scheme', 2 => 'userinfo', 3 => 'host', 4 => 'port',
- 5 => 'path', 6 => 'file', 7 => 'fragment'
+ 5 => 'path', 6 => 'file', 7 => 'query', 8 => 'fragment'
);
$default = array('');
foreach(array_keys($array) as $uri) {
- array_rename_keys($array[$uri], $parts, TRUE, $default);
- $offset = $array[$uri]['scheme'][1]; // Scheme's offset
+ $_uri = & $array[$uri];
+ array_rename_keys($_uri, $parts, TRUE, $default);
- foreach(array_keys($array[$uri]) as $part) {
+ $offset = $_uri['scheme'][1]; // Scheme's offset
+ foreach(array_keys($_uri) as $part) {
// Remove offsets for each part
- $array[$uri][$part] = & $array[$uri][$part][0];
+ $_uri[$part] = & $_uri[$part][0];
}
if ($normalize) {
- $array[$uri]['scheme'] = scheme_normalize($array[$uri]['scheme']);
- //if ($array[$uri]['scheme'] === '') {
- // // Ignore
- // unset ($array[$uri]);
- // continue;
- //}
-
- $array[$uri]['host'] = strtolower($array[$uri]['host']);
- $array[$uri]['port'] = port_normalize($array[$uri]['port'], $array[$uri]['scheme'], FALSE);
- $array[$uri]['path'] = path_normalize($array[$uri]['path']);
- //$array[$uri]['uri'] = uri_array_implode($array[$uri]);
- if ($preserve_rawuri) $array[$uri]['rawuri'] = & $array[$uri][0];
+ $_uri['scheme'] = scheme_normalize($_uri['scheme']);
+ if ($_uri['scheme'] === '') {
+ unset($array[$uri]);
+ continue;
+ }
+ $_uri['host'] = strtolower($_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 {
- $array[$uri]['uri'] = & $array[$uri][0]; // Raw
+ $_uri['uri'] = & $_uri[0]; // Raw
}
- unset($array[$uri][0]); // Matched string itself
+ unset($_uri[0]); // Matched string itself
if (! $preserve_chunk) {
unset(
- $array[$uri]['scheme'],
- $array[$uri]['userinfo'],
- $array[$uri]['host'],
- $array[$uri]['port'],
- $array[$uri]['path'],
- $array[$uri]['file'],
- $array[$uri]['fragment']
+ $_uri['scheme'],
+ $_uri['userinfo'],
+ $_uri['host'],
+ $_uri['port'],
+ $_uri['path'],
+ $_uri['file'],
+ $_uri['query'],
+ $_uri['fragment']
);
}
- $array[$uri]['offset'] = $offset;
- $array[$uri]['area'] = 0;
+ // Area offset for area_measure()
+ $_uri['area']['offset'] = $offset;
}
return $array;
}
+// Destructive normalize of URI array
+// NOTE: Give me the uri_pickup() result with chunks
+function uri_array_normalize(& $pickups, $preserve = TRUE)
+{
+ if (! is_array($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
+ }
+
+ return $pickups;
+}
+
+// An URI array => An URI (See uri_pickup())
+function uri_array_implode($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'];
+ $tmp[] = '@';
+ }
+ if (isset($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);
+}
+
+// $array['something'] => $array['wanted']
+function array_rename_keys(& $array, $keys = array('from' => 'to'), $force = FALSE, $default = '')
+{
+ if (! is_array($array) || ! is_array($keys)) return FALSE;
+
+ // Nondestructive test
+ if (! $force)
+ foreach(array_keys($keys) as $from)
+ if (! isset($array[$from]))
+ return FALSE;
+
+ foreach($keys as $from => $to) {
+ if ($from === $to) continue;
+ if (! $force || isset($array[$from])) {
+ $array[$to] = & $array[$from];
+ unset($array[$from]);
+ } else {
+ $array[$to] = $default;
+ }
+ }
+
+ return TRUE;
+}
+
+// ---------------------
+// Area pickup
+
+// Pickup all of markup areas
+function area_pickup($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_
+ $regex = '#<a\b[^>]*\bhref\b[^>]*>.*?</a\b[^>]*(>)#i';
+ if (isset($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 = '#\[(url|link)\b[^\]]*\].*?\[/\1\b[^\]]*(\])#i';
+ 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
+
// 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
}
// Flipped URI
- $result =
- $matches[1] . '://' . // scheme
- $matches[4] . // nasty.example.com
- '/?refer=' . strtolower($matches[2]) . // victim.example.org
- ' ' . $result;
+ if (isset($matches[4])) {
+ $result =
+ $matches[1] . '://' . // scheme
+ $matches[4] . // nasty.example.com
+ '/?refer=' . strtolower($matches[2]) . // victim.example.org
+ ' ' . $result;
+ }
return $result;
}
-// Preprocess: rawurldecode() and adding space(s) to detect/count some URIs _if possible_
+// Preprocess: rawurldecode() and adding space(s) and something
+// to detect/count some URIs _if possible_
// NOTE: It's maybe danger to var_dump(result). [e.g. 'javascript:']
// [OK] http://victim.example.org/go?http%3A%2F%2Fnasty.example.org
// [OK] http://victim.example.org/http://nasty.example.org
+// TODO: link.toolbot.com, urlx.org
function spam_uri_pickup_preprocess($string = '')
{
if (! is_string($string)) return '';
// Domain exposure (See _preg_replace_callback_domain_exposure())
$string = preg_replace_callback(
array(
- // Something Google: http://www.google.com/supported_domains
- '#(http)://([a-z0-9.]+\.google\.[a-z]{2,3}(?:\.[a-z]{2})?)/' .
- '([a-z0-9?=&.%_+-]+)' . // ?query=foo+
- '\bsite:([a-z0-9.%_-]+)' . // site:nasty.example.com
- '()' . // Preserve?
+ '#(http)://' .
+ '(' .
+ // Something Google: http://www.google.com/supported_domains
+ '(?:[a-z0-9.]+\.)?google\.[a-z]{2,3}(?:\.[a-z]{2})?' .
+ '|' .
+ // AltaVista
+ '(?:[a-z0-9.]+\.)?altavista.com' .
+
+ ')' .
+ '/' .
+ '([a-z0-9?=&.%_/\'\\\+-]+)' . // path/?query=foo+bar+
+ '\bsite:([a-z0-9.%_-]+\.[a-z0-9.%_-]+)' . // site:nasty.example.com
+ //'()' . // Preserve or remove?
'#i',
),
'_preg_replace_callback_domain_exposure',
// URI exposure (uriuri => uri uri)
$string = preg_replace(
array(
- '#(?<! )(?:https?|ftp):/#',
+ '#(?<! )(?:https?|ftp):/#i',
// '#[a-z][a-z0-9.+-]{1,8}://#i',
// '#[a-z][a-z0-9.+-]{1,8}://#i'
),
return $string;
}
-// TODO: Area selection (Check BBCode only, check anchor only, check ...)
// Main function of spam-uri pickup
-function spam_uri_pickup($string = '')
+function spam_uri_pickup($string = '', $method = array())
{
+ if (! is_array($method) || empty($method)) {
+ $method = check_uri_spam_method();
+ }
+
$string = spam_uri_pickup_preprocess($string);
$array = uri_pickup($string);
- // Area elevation for '(especially external)link' intension
+ // Area elevation of URIs, for '(especially external)link' intension
if (! empty($array)) {
- // Anchor tags by preg_match_all()
- // [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_
- // [NG] <a href= >Good site!</a> <a href= "#" >test</a>
- $areas = array();
- preg_match_all('#<a\b[^>]*href[^>]*>.*?</a\b[^>]*(>)#i',
- $string, $areas, PREG_SET_ORDER | PREG_OFFSET_CAPTURE);
- //var_dump(recursive_map('htmlspecialchars', $areas));
- foreach(array_keys($areas) as $area) {
- $areas[$area] = array(
- $areas[$area][0][1], // Area start (<a href>)
- $areas[$area][1][1], // Area end (</a>)
- );
- }
- area_measure($areas, $array);
-
- // phpBB's "BBCode" by preg_match_all()
- // [url]http://nasty.example.com/[/url]
- // [link]http://nasty.example.com/[/link]
- // [url=http://nasty.example.com]visit http://nasty.example.com/[/url]
- // [link http://nasty.example.com/]buy something[/link]
- // ?? [url=][/url]
- $areas = array();
- preg_match_all('#\[(url|link)\b[^\]]*\].*?\[/\1\b[^\]]*(\])#i',
- $string, $areas, PREG_SET_ORDER | PREG_OFFSET_CAPTURE);
- //var_dump(recursive_map('htmlspecialchars', $areas));
- foreach(array_keys($areas) as $area) {
- $areas[$area] = array(
- $areas[$area][0][1], // Area start ([url])
- $areas[$area][2][1], // Area end ([/url])
- );
- }
- area_measure($areas, $array);
-
- // Various Wiki syntax
- // [text_or_uri>text_or_uri]
- // [text_or_uri:text_or_uri]
- // [text_or_uri|text_or_uri]
- // [text_or_uri->text_or_uri]
- // [text_or_uri text_or_uri] // MediaWiki
- // MediaWiki: [http://nasty.example.com/ visit http://nasty.example.com/]
-
- // Remove 'offset's for area_measure()
- //foreach(array_keys($array) as $key)
- // unset($array[$key]['offset']);
- }
-
- return $array;
-}
-
-// $array['something'] => $array['wanted']
-function array_rename_keys(& $array, $keys = array('from' => 'to'), $force = FALSE, $default = '')
-{
- if (! is_array($array) || ! is_array($keys))
- return FALSE;
-
- // Nondestructive test
- if (! $force)
- foreach(array_keys($keys) as $from)
- if (! isset($array[$from]))
- return FALSE;
-
- foreach($keys as $from => $to) {
- if ($from === $to) continue;
- if (! $force || isset($array[$from])) {
- $array[$to] = & $array[$from];
- unset($array[$from]);
- } else {
- $array[$to] = $default;
- }
- }
-
- return TRUE;
-}
-
-// If in doubt, it's a little doubtful
-function area_measure($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;
+ $_method = array();
+ if (isset($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 $array;
}
// ---------------------
-// Part Two
+// Normalization
// Scheme normalization: Renaming the schemes
// snntp://example.org => nntps://example.org
// http://example.org/path/../../a/../back => http://example.org/back
function path_normalize($path = '', $divider = '/', $addroot = TRUE)
{
- if (! is_string($path) || $path == '') {
- $path = $addroot ? $divider : '';
- } else {
- $path = trim($path);
- $last = ($path[strlen($path) - 1] == $divider) ? $divider : '';
- $array = explode($divider, $path);
-
- // Remove paddings
- foreach(array_keys($array) as $key) {
- if ($array[$key] == '' || $array[$key] == '.')
- unset($array[$key]);
- }
- // Back-track
- $tmp = array();
- foreach($array as $value) {
- if ($value == '..') {
- array_pop($tmp);
- } else {
- array_push($tmp, $value);
- }
- }
- $array = & $tmp;
+ if (! is_string($path) || $path == '')
+ return $addroot ? $divider : '';
+
+ $path = trim($path);
+ $last = ($path[strlen($path) - 1] == $divider) ? $divider : '';
+ $array = explode($divider, $path);
- $path = $addroot ? $divider : '';
- if (! empty($array)) $path .= implode($divider, $array) . $last;
+ // Remove paddings
+ foreach(array_keys($array) as $key) {
+ if ($array[$key] == '' || $array[$key] == '.')
+ unset($array[$key]);
}
+ // Back-track
+ $tmp = array();
+ foreach($array as $value) {
+ if ($value == '..') {
+ array_pop($tmp);
+ } else {
+ array_push($tmp, $value);
+ }
+ }
+ $array = & $tmp;
+
+ $path = $addroot ? $divider : '';
+ if (! empty($array)) $path .= implode($divider, $array) . $last;
return $path;
}
-// An URI array => An URI (See uri_pickup())
-function uri_array_implode($uri = array())
+// DirectoryIndex normalize (Destructive and rough)
+function file_normalize($string = 'index.html.en')
{
- if (empty($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'];
- $tmp[] = '@';
- }
- if (isset($uri['host']) && $uri['host'] !== '') {
- $tmp[] = & $uri['host'];
- }
- if (isset($uri['port']) && $uri['port'] !== '') {
- $tmp[] = ':';
- $tmp[] = & $uri['port'];
+ 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,
+ 'default.htm' => TRUE,
+ 'default.html' => TRUE,
+ 'default.asp' => TRUE,
+ 'default.aspx' => TRUE,
+ );
+
+ // 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 = & $string;
}
- if (isset($uri['path']) && $uri['path'] !== '') {
- $tmp[] = & $uri['path'];
+
+ if (isset($array[strtolower($_string)])) {
+ return '';
+ } else {
+ return $string;
}
- if (isset($uri['file']) && $uri['file'] !== '') {
- $tmp[] = & $uri['file'];
+}
+
+// Sort query-strings if possible (Destructive and rough)
+// [OK] &&&&f=d&b&d&c&a=0dd => a=0dd&b&c&d&f=d
+// [OK] nothing==&eg=dummy&eg=padding&eg=foobar => eg=foobar
+function query_normalize($string = '', $equal = FALSE, $equal_cutempty = TRUE)
+{
+ $array = explode('&', $string);
+
+ // Remove '&' paddings
+ foreach(array_keys($array) as $key) {
+ if ($array[$key] == '') {
+ unset($array[$key]);
+ }
}
- if (isset($uri['fragment']) && $uri['fragment'] !== '') {
- $tmp[] = '#';
- $tmp[] = & $uri['fragment'];
+
+ // Consider '='-sepalated input and paddings
+ if ($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);
}
- return implode('', $tmp);
+ natsort($array);
+ return implode('&', $array);
}
// ---------------------
// Part One : Checker
+// Rough implementation of globbing
+//
+// USAGE: $regex = '/^' . generate_glob_regex('*.txt', '/') . '$/i';
+//
function generate_glob_regex($string = '', $divider = '/')
{
static $from = array(
- 0 => '*',
- 1 => '?',
- 2 => '\[',
- 3 => '\]',
- 4 => '[',
- 5 => ']',
+ 1 => '*',
+ 11 => '?',
+ // 22 => '[', // Maybe cause regex compilation error (e.g. '[]')
+ // 23 => ']', //
);
static $mid = array(
- 0 => '_AST_',
- 1 => '_QUE_',
- 2 => '_eRBR_',
- 3 => '_eLBR_',
- 4 => '_RBR_',
- 5 => '_LBR_',
+ 1 => '_AST_',
+ 11 => '_QUE_',
+ // 22 => '_RBR_',
+ // 23 => '_LBR_',
);
static $to = array(
- 0 => '.*',
- 1 => '.',
- 2 => '\[',
- 3 => '\]',
- 4 => '[',
- 5 => ']',
+ 1 => '.*',
+ 11 => '.',
+ // 22 => '[',
+ // 23 => ']',
);
- $string = str_replace($from, $mid, $string); // Hide
- $string = preg_quote($string, $divider);
- $string = str_replace($mid, $to, $string); // Unhide
-
- return $string;
+ if (is_array($string)) {
+ // Recurse
+ return '(?:' .
+ implode('|', // OR
+ array_map('generate_glob_regex',
+ $string,
+ array_pad(array(), count($string), $divider)
+ )
+ ) .
+ ')';
+ } else {
+ $string = str_replace($from, $mid, $string); // Hide
+ $string = preg_quote($string, $divider);
+ $string = str_replace($mid, $to, $string); // Unhide
+ return $string;
+ }
}
-// TODO: Ignore list
-// TODO: require_or_include_once(another file)
-function is_badhost($hosts = '', $asap = TRUE)
+function get_blocklist($list = '')
{
- static $blocklist_regex;
-
- if (! isset($blocklist_regex)) {
- $blocklist_regex = array();
- $blocklist = array(
- // Deny all uri
- //'*',
-
- // IP address or ...
- //'10.20.*.*', // 10.20.example.com also matches
- //'\[1\]',
-
- // Too much malicious sub-domains
- '*.blogspot.com',
-
- // 2006-11 dev
- 'wwwtahoo.com',
-
- // 2006-11 dev
- '*.infogami.com',
-
- // 2006/11/19 17:50 dev
- '*.google0site.org',
- '*.bigpricesearch.org',
- '*.osfind.org',
- '*.bablomira.biz',
- );
- foreach ($blocklist as $part) {
- $blocklist_regex[] = '#^' . generate_glob_regex($part, '#') . '$#i';
+ static $regexs;
+
+ if (! isset($regexs)) {
+ $regexs = array();
+ if (file_exists(SPAM_INI_FILE)) {
+ $blocklist = array();
+ include(SPAM_INI_FILE);
+ // $blocklist['badhost'] = array(
+ // '*.blogspot.com', // Blog services's subdomains (only)
+ // 'IANA-examples' => '#^(?:.*\.)?example\.(?:com|net|org)$#',
+ // );
+ foreach(array('goodhost', 'badhost') as $_list) {
+ if (! isset($blocklist[$list])) continue;
+ foreach ($blocklist[$_list] as $key => $value) {
+ if (is_string($key)) {
+ $regexs[$_list][$key] = $value;
+ } else {
+ $regexs[$_list][$value] =
+ '/^(?:www\.)?' . generate_glob_regex($value, '/') . '$/i';
+ }
+ }
+ }
}
}
- $result = 0;
+ if ($list == '') {
+ return $regexs; // ALL
+ } else if (isset($regexs[$list])) {
+ return $regexs[$list];
+ } else {
+ return array();
+ }
+}
+
+function is_badhost($hosts = array(), $asap = TRUE, & $remains)
+{
+ $result = array();
if (! is_array($hosts)) $hosts = array($hosts);
- foreach($hosts as $host) {
- if (! is_string($host)) $host = '';
- foreach ($blocklist_regex as $regex) {
- if (preg_match($regex, $host)) {
- ++$result;
- if ($asap) {
- return $result;
- } else {
- break; // Check next host
- }
- }
+ foreach(array_keys($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, $hosts);
+ }
+ if (empty($hosts)) return $result;
+
+ $tmp = array();
+ foreach (get_blocklist('badhost') as $label => $regex) {
+ $result[$label] = preg_grep($regex, $hosts);
+ if (empty($result[$label])) {
+ unset($result[$label]);
+ } else {
+ $hosts = array_diff($hosts, $result[$label]);
+ if ($asap) break;
}
}
+ $remains = $hosts;
+
return $result;
}
-// TODO return TRUE or FALSE!
-// Simple/fast spam check
-function check_uri_spam($target = '', $method = array(), $asap = TRUE)
+// Default (enabled) methods and thresholds (for content insertion)
+function check_uri_spam_method($times = 1, $t_area = 0, $rule = TRUE)
{
- $is_spam = FALSE;
- $progress = array(
- 'quantity' => 0,
- 'area' => 0,
- 'non_uniq' => 0,
- 'badhost' => 0,
+ $times = intval($times);
+ $t_area = intval($t_area);
+
+ $positive = array(
+ // Thresholds
+ 'quantity' => 8 * $times, // Allow N URIs
+ 'non_uniqhost' => 3 * $times, // Allow N duped (and normalized) Hosts
+ //'non_uniquri'=> 3 * $times, // Allow N duped (and normalized) URIs
+
+ // Areas
+ 'area_anchor' => $t_area, // Using <a href> HTML tag
+ 'area_bbcode' => $t_area, // Using [url] or [link] BBCode
+ //'uri_anchor' => $t_area, // URI inside <a href> HTML tag
+ //'uri_bbcode' => $t_area, // URI inside [url] or [link] BBCode
+ );
+ if ($rule) {
+ $bool = array(
+ // Rules
+ //'asap' => TRUE, // Quit or return As Soon As Possible
+ 'uniqhost' => TRUE, // Show uniq host (at block notification mail)
+ 'badhost' => TRUE, // Check badhost
);
+ } else {
+ $bool = array();
+ }
+
+ // Remove non-$positive values
+ foreach (array_keys($positive) as $key) {
+ if ($positive[$key] < 0) unset($positive[$key]);
+ }
+ return $positive + $bool;
+}
+
+// Simple/fast spam check
+function check_uri_spam($target = '', $method = array())
+{
if (! is_array($method) || empty($method)) {
- // Default
- $method = array(
- 'quantity' => 8, // Allow N URIs
- 'area' => TRUE,
- 'non_uniq' => 3, // Allow N times dupe
- 'badhost' => TRUE,
- );
+ $method = check_uri_spam_method();
}
+ $progress = array(
+ 'sum' => array(
+ 'quantity' => 0,
+ 'uniqhost' => 0,
+ 'non_uniqhost'=> 0,
+ 'non_uniquri' => 0,
+ 'badhost' => 0,
+ 'area_anchor' => 0,
+ 'area_bbcode' => 0,
+ 'uri_anchor' => 0,
+ 'uri_bbcode' => 0,
+ ),
+ 'is_spam' => array(),
+ 'method' => & $method,
+ 'remains' => array(),
+ );
+ $sum = & $progress['sum'];
+ $is_spam = & $progress['is_spam'];
+ $remains = & $progress['remains'];
+ $asap = isset($method['asap']);
+ // Recurse
if (is_array($target)) {
foreach($target as $str) {
// Recurse
- list($is_spam, $_progress) = check_uri_spam($str, $method);
- $progress['quantity'] += $_progress['quantity'];
- $progress['non_uniq'] += $_progress['non_uniq'];
- if ($asap || $is_spam) break;
+ $_progress = check_uri_spam($str, $method);
+ $_sum = & $_progress['sum'];
+ $_is_spam = & $_progress['is_spam'];
+ $_remains = & $_progress['remains'];
+ foreach (array_keys($_sum) as $key) {
+ $sum[$key] += $_sum[$key];
+ }
+ foreach (array_keys($_is_spam) as $key) {
+ if (is_array($_is_spam[$key])) {
+ // Marge keys (badhost)
+ foreach(array_keys($_is_spam[$key]) as $_key) {
+ if (! isset($is_spam[$key][$_key])) {
+ $is_spam[$key][$_key] = $_is_spam[$key][$_key];
+ } else {
+ $is_spam[$key][$_key] += $_is_spam[$key][$_key];
+ }
+ }
+ } else {
+ $is_spam[$key] = TRUE;
+ }
+ }
+ foreach ($_remains as $key=>$value) {
+ foreach ($value as $_key=>$_value) {
+ if (is_int($_key)) {
+ $remains[$key][] = $_value;
+ } else {
+ $remains[$key][$_key] = $_value;
+ }
+ }
+ }
+ if ($asap && $is_spam) break;
}
- } else {
- $pickups = spam_uri_pickup($target);
- $progress['quantity'] += count($pickups);
+ return $progress;
+ }
- if (! empty($pickups)) {
+ // Area: There's HTML anchor tag
+ if ((! $asap || ! $is_spam) && isset($method['area_anchor'])) {
+ $key = 'area_anchor';
+ $_asap = isset($method['asap']) ? array('asap' => TRUE) : array();
+ $result = area_pickup($target, array($key => TRUE) + $_asap);
+ if ($result) {
+ $sum[$key] = $result[$key];
+ if (isset($method[$key]) && $sum[$key] > $method[$key]) {
+ $is_spam[$key] = TRUE;
+ }
+ }
+ }
- // URI quantity
- if ((! $is_spam || ! $asap) && isset($method['quantity']) &&
- $progress['quantity'] > $method['quantity']) {
- $is_spam = TRUE;
+ // Area: There's 'BBCode' linking tag
+ if ((! $asap || ! $is_spam) && isset($method['area_bbcode'])) {
+ $key = 'area_bbcode';
+ $_asap = isset($method['asap']) ? array('asap' => TRUE) : array();
+ $result = area_pickup($target, array($key => TRUE) + $_asap);
+ if ($result) {
+ $sum[$key] = $result[$key];
+ if (isset($method[$key]) && $sum[$key] > $method[$key]) {
+ $is_spam[$key] = TRUE;
}
- //var_dump($method['quantity'], $is_spam);
-
- // Using invalid area
- if ((! $is_spam || ! $asap) && isset($method['area'])) {
- foreach($pickups as $pickup) {
- if ($pickup['area'] < 0) {
- ++$progress['area'];
- $is_spam = TRUE;
- if ($asap) break;
- }
+ }
+ }
+
+ // Return if ...
+ if ($asap && $is_spam) return $progress;
+
+ // URI: Pickup
+ $pickups = spam_uri_pickup($target, $method);
+ //$remains['uri_pickup'] = & $pickups;
+
+ // Return if ...
+ if (empty($pickups)) return $progress;
+
+ // URI: Check quantity
+ $sum['quantity'] += count($pickups);
+ // URI quantity
+ if ((! $asap || ! $is_spam) && isset($method['quantity']) &&
+ $sum['quantity'] > $method['quantity']) {
+ $is_spam['quantity'] = TRUE;
+ }
+
+ // URI: used inside HTML anchor tag pair
+ if ((! $asap || ! $is_spam) && isset($method['uri_anchor'])) {
+ $key = 'uri_anchor';
+ foreach($pickups as $pickup) {
+ if (isset($pickup['area'][$key])) {
+ $sum[$key] += $pickup['area'][$key];
+ if(isset($method[$key]) &&
+ $sum[$key] > $method[$key]) {
+ $is_spam[$key] = TRUE;
+ if ($asap && $is_spam) break;
}
+ if ($asap && $is_spam) break;
}
- //var_dump($method['area'], $is_spam);
+ }
+ }
- // URI uniqueness (and removing non-uniques)
- if ((! $is_spam || ! $asap) && isset($method['non_uniq'])) {
- $uris = array();
- foreach ($pickups as $key => $pickup) {
- $uris[$key] = uri_array_implode($pickup);
- }
- $count = count($uris);
- $uris = array_unique($uris);
- $progress['non_uniq'] += $count - count($uris);
- if ($progress['non_uniq'] > $method['non_uniq']) {
- $is_spam = TRUE;
+ // URI: used inside 'BBCode' pair
+ if ((! $asap || ! $is_spam) && isset($method['uri_bbcode'])) {
+ $key = 'uri_bbcode';
+ foreach($pickups as $pickup) {
+ if (isset($pickup['area'][$key])) {
+ $sum[$key] += $pickup['area'][$key];
+ if(isset($method[$key]) &&
+ $sum[$key] > $method[$key]) {
+ $is_spam[$key] = TRUE;
+ if ($asap && $is_spam) break;
}
- if (! $asap || ! $is_spam) {
- foreach (array_diff(array_keys($pickups),
- array_keys($uris)) as $remove) {
- unset($pickups[$remove]);
- }
+ if ($asap && $is_spam) break;
+ }
+ }
+ }
+
+ // 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]);
+ }
+ $count = count($uris);
+ $uris = array_unique($uris);
+ $sum['non_uniquri'] += $count - count($uris);
+ if ($sum['non_uniquri'] > $method['non_uniquri']) {
+ $is_spam['non_uniquri'] = TRUE;
+ }
+ if (! $asap || ! $is_spam) {
+ foreach (array_diff(array_keys($pickups),
+ array_keys($uris)) as $remove) {
+ unset($pickups[$remove]);
+ }
+ }
+ unset($uris);
+ }
+
+ // Return if ...
+ if ($asap && $is_spam) return $progress;
+
+ // Host: Uniqueness (uniq / non-uniq)
+ $hosts = array();
+ foreach ($pickups as $pickup) $hosts[] = & $pickup['host'];
+ $hosts = array_unique($hosts);
+ //$remains['uniqhost'] = & $hosts;
+ $sum['uniqhost'] += count($hosts);
+ if ((! $asap || ! $is_spam) && isset($method['non_uniqhost'])) {
+ $sum['non_uniqhost'] = $sum['quantity'] - $sum['uniqhost'];
+ if ($sum['non_uniqhost'] > $method['non_uniqhost']) {
+ $is_spam['non_uniqhost'] = TRUE;
+ }
+ }
+
+ // Return if ...
+ if ($asap && $is_spam) return $progress;
+
+ // URI: Bad host
+ if ((! $asap || ! $is_spam) && isset($method['badhost'])) {
+ $__remains = array();
+ if ($asap) {
+ $badhost = is_badhost($hosts, $asap, $__remains);
+ } else {
+ $badhost = is_badhost($hosts, $asap, $__remains);
+ if ($__remains) {
+ $remains['badhost'] = array();
+ foreach ($__remains as $value) {
+ $remains['badhost'][$value] = TRUE;
}
- unset($uris);
- //var_dump($uris, $pickups);
}
- //var_dump($method['non_uniq'], $is_spam);
+ }
+ unset($__remains);
+ if (! empty($badhost)) {
+ $sum['badhost'] += array_count_leaves($badhost);
+ foreach(array_keys($badhost) as $keys) {
+ $is_spam['badhost'][$keys] =
+ array_count_leaves($badhost[$keys]);
+ }
+ unset($badhost);
+ }
+ }
+
+ return $progress;
+}
- // Bad host
- if ((! $is_spam || ! $asap) && isset($method['badhost'])) {
- $hosts = array();
- foreach ($pickups as $pickup) {
- $hosts[] = & $pickup['host'];
+// Count leaves
+function array_count_leaves($array = array(), $count_empty_array = FALSE)
+{
+ if (! is_array($array) || (empty($array) && $count_empty_array))
+ return 1;
+
+ // Recurse
+ $result = 0;
+ foreach ($array as $part) {
+ $result += array_count_leaves($part, $count_empty_array);
+ }
+ return $result;
+}
+
+// ---------------------
+// Reporting
+
+// TODO: Don't show unused $method!
+// Summarize $progress (blocked only)
+function summarize_spam_progress($progress = array(), $blockedonly = FALSE)
+{
+ if ($blockedonly) {
+ $tmp = array_keys($progress['is_spam']);
+ } else {
+ $tmp = array();
+ $method = & $progress['method'];
+ if (isset($progress['sum'])) {
+ foreach ($progress['sum'] as $key => $value) {
+ if (isset($method[$key])) {
+ $tmp[] = $key . '(' . $value . ')';
}
- $count = is_badhost(array_unique($hosts), $asap);
- $progress['badhost'] += $count;
- if ($count !== 0) $is_spam = TRUE;
}
- //var_dump($method['badhost'], $is_spam);
}
}
- return array($is_spam, $progress);
+ return implode(', ', $tmp);
}
// ---------------------
+// Exit
-// Check User-Agent (not testing yet)
-function is_invalid_useragent($ua_name = '' /*, $ua_vars = ''*/ )
+// Common bahavior for blocking
+// NOTE: Call this function from various blocking feature, to disgueise the reason 'why blocked'
+function spam_exit($mode = '', $data = array())
{
- return $ua_name === '';
+ switch ($mode) {
+ case '': echo("\n"); break;
+ case 'dump':
+ echo('<pre>' . "\n");
+ echo htmlspecialchars(var_export($data, TRUE));
+ echo('</pre>' . "\n");
+ break;
+ };
+
+ // Force exit
+ exit;
}
+
// ---------------------
+// Simple filtering
-// TODO: Separate check-part(s) and mail part
-// TODO: Mail to administrator with more measurement data?
+// TODO: Record them
// Simple/fast spam filter ($target: 'a string' or an array())
-function pkwk_spamfilter($action, $page, $target = array('title' => ''), $method = array())
+function pkwk_spamfilter($action, $page, $target = array('title' => ''), $method = array(), $exitmode = '')
{
- $is_spam = FALSE;
+ $progress = check_uri_spam($target, $method);
- //$is_spam = is_invalid_useragent('NOTYET');
- if ($is_spam) {
- $action .= ' (Invalid User-Agent)';
- } else {
- list($is_spam) = check_uri_spam($target, $method);
- }
-
- if ($is_spam) {
+ if (! empty($progress['is_spam'])) {
// Mail to administrator(s)
- global $notify, $notify_subject;
- if ($notify) {
- $footer['ACTION'] = $action;
- $footer['PAGE'] = '[blocked] ' . $page;
- $footer['URI'] = get_script_uri() . '?' . rawurlencode($page);
- $footer['USER_AGENT'] = TRUE;
- $footer['REMOTE_ADDR'] = TRUE;
- pkwk_mail_notify($notify_subject, var_export($target, TRUE), $footer);
- unset($footer);
- }
- }
+ pkwk_spamnotify($action, $page, $target, $progress, $method);
- if ($is_spam) spam_exit();
+ // Exit
+ spam_exit($exitmode, $progress);
+ }
}
// ---------------------
+// PukiWiki original
-// Common bahavior for blocking
-// NOTE: Call this function from various blocking feature, to disgueise the reason 'why blocked'
-function spam_exit()
+// Mail to administrator(s)
+function pkwk_spamnotify($action, $page, $target = array('title' => ''), $progress = array(), $method = array())
{
- die("\n");
+ global $notify, $notify_subject;
+
+ if (! $notify) return;
+
+ $asap = isset($method['asap']);
+
+ $summary['ACTION'] = 'Blocked by: ' . summarize_spam_progress($progress, TRUE);
+ if (! $asap) {
+ $summary['METRICS'] = summarize_spam_progress($progress);
+ }
+ if (isset($progress['is_spam']['badhost'])) {
+ $badhost = array();
+ foreach($progress['is_spam']['badhost'] as $glob=>$number) {
+ $badhost[] = $glob . '(' . $number . ')';
+ }
+ $summary['DETAIL_BADHOST'] = implode(', ', $badhost);
+ }
+ if (! $asap && $progress['remains']['badhost']) {
+ $count = count($progress['remains']['badhost']);
+ $summary['DETAIL_NEUTRAL_HOST'] = $count .
+ ' (' .
+ preg_replace(
+ '/[^, a-z0-9.-]/i', '',
+ implode(', ', array_keys($progress['remains']['badhost']))
+ ) .
+ ')';
+ }
+ $summary['COMMENT'] = $action;
+ $summary['PAGE'] = '[blocked] ' . (is_pagename($page) ? $page : '');
+ $summary['URI'] = get_script_uri() . '?' . rawurlencode($page);
+ $summary['USER_AGENT'] = TRUE;
+ $summary['REMOTE_ADDR'] = TRUE;
+ pkwk_mail_notify($notify_subject, var_export($target, TRUE), $summary, TRUE);
}
?>
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