<?php
-// $Id: spam.php,v 1.140 2007/05/01 05:29:19 henoheno Exp $
+// $Id: spam.php,v 1.170 2007/06/09 02:22:13 henoheno Exp $
// Copyright (C) 2006-2007 PukiWiki Developers Team
// License: GPL v2 or (at your option) any later version
//
}
}
+// ----
+
+// Very roughly, shrink the lines of var_export()
+// NOTE: If the same data exists, it must be corrupted.
+function var_export_shrink($expression, $return = FALSE, $ignore_numeric_keys = FALSE)
+{
+ $result =preg_replace(
+ // Remove a newline and spaces
+ '# => \n *array \(#', ' => array (',
+ var_export($expression, TRUE)
+ );
+
+ if ($ignore_numeric_keys) {
+ $result =preg_replace(
+ // Remove numeric keys
+ '#^( *)[0-9]+ => #m', '$1',
+ $result
+ );
+ }
+
+ if ($return) {
+ return $result;
+ } else {
+ echo $result;
+ return NULL;
+ }
+}
+
+// Remove redundant values from array()
+function array_unique_recursive($array = array())
+{
+ if (! is_array($array)) return $array;
+
+ $tmp = array();
+ foreach($array as $key => $value){
+ if (is_array($value)) {
+ $array[$key] = array_unique_recursive($value);
+ } else {
+ if (isset($tmp[$value])) {
+ unset($array[$key]);
+ } else {
+ $tmp[$value] = TRUE;
+ }
+ }
+ }
+
+ return $array;
+}
+
+// Renumber all numeric keys from 0
+function array_renumber_numeric_keys(& $array)
+{
+ if (! is_array($array)) return $array;
+
+ $count = -1;
+ $tmp = array();
+ foreach($array as $key => $value){
+ if (is_array($value)) array_renumber_numeric_keys($array[$key]); // Recurse
+ if (is_numeric($key)) $tmp[$key] = ++$count;
+ }
+ array_rename_keys($array, $tmp);
+
+ return $array;
+}
+
// Roughly strings(1) using PCRE
// This function is useful to:
// * Reduce the size of data, from removing unprintable binary data
),
$binary);
} else {
+ // Remove "\0" etc. Preserve readable spaces if possible.
$binary = preg_replace('/(?:[^[:graph:][:space:]]|[\r])+/s', "\n", $binary);
}
if ($min_len > 1) {
$min_len = min(1024, intval($min_len));
- $binary =
- implode("\n",
- preg_grep('/^.{' . $min_len . ',}/S',
- explode("\n", $binary)
- )
- );
+ $regex = '/^.{' . $min_len . ',}/S';
+ if (is_array($binary)) {
+ foreach(array_keys($binary) as $key) {
+ $binary[$key] = implode("\n", preg_grep($regex, explode("\n", $binary[$key])));
+ }
+ } else {
+ $binary = implode("\n", preg_grep($regex, explode("\n", $binary)));
+ }
}
return $binary;
}
+// Reverse $string with specified delimiter
+function delimiter_reverse($string = 'foo.bar.example.com', $from_delim = '.', $to_delim = '.')
+{
+ if (! is_string($string) || ! is_string($from_delim) || ! is_string($to_delim))
+ return $string;
+
+ // com.example.bar.foo
+ return implode($to_delim, array_reverse(explode($from_delim, $string)));
+}
+
// ---------------------
// URI pickup
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
- '[a-z0-9.-]+' . // hostname(FQDN) : foo.example.org
+ '[a-z0-9][a-z0-9.-]+[a-z0-9]' . // hostname(FQDN) : foo.example.org
')' .
'(?::([0-9]*))?' . // 4: Port
'((?:/+[^\s<>"\'\[\]/\#]+)*/+)?' . // 5: Directory path or path-info
// http://victim.example.org/nasty.example.org/path#frag
// => http://nasty.example.org/?refer=victim.example.org and original
$string = preg_replace(
- '#http://' .
+ '#h?ttp://' .
'(' .
'ime\.nu' . '|' . // 2ch.net
'ime\.st' . '|' . // 2ch.net
$string
);
+ // Domain exposure (gate-big5)
+ // http://victim.example.org/gate/big5/nasty.example.org/path
+ // => http://nasty.example.org/?refer=victim.example.org and original
+ $string = preg_replace(
+ '#h?ttp://' .
+ '(' .
+ 'big5.51job.com' . '|' .
+ 'big5.china.com' . '|' .
+ 'big5.xinhuanet.com' . '|' .
+ ')' .
+ '/gate/big5' .
+ '/([a-z0-9.%_-]+\.[a-z0-9.%_-]+)' .
+ '#i', // nasty.example.org
+ 'http://$2/?refer=$1 $0', // Preserve $0 or remove?
+ $string
+ );
+
// Domain exposure (See _preg_replace_callback_domain_exposure())
$string = preg_replace_callback(
array(
function get_blocklist($list = '')
{
- static $regexs;
+ static $regexes;
+
+ if ($list === NULL) {
+ $regexes = NULL; // Unset
+ return array();
+ }
- if (! isset($regexs)) {
- $regexs = array();
+ if (! isset($regexes)) {
+ $regexes = array();
if (file_exists(SPAM_INI_FILE)) {
$blocklist = array();
include(SPAM_INI_FILE);
// 'IANA-examples' => '#^(?:.*\.)?example\.(?:com|net|org)$#',
// );
if (isset($blocklist['list'])) {
- $regexs['list'] = & $blocklist['list'];
+ $regexes['list'] = & $blocklist['list'];
} else {
// Default
$blocklist['list'] = array(
if (! isset($blocklist[$_list])) continue;
foreach ($blocklist[$_list] as $key => $value) {
if (is_array($value)) {
- $regexs[$_list][$key] = array();
+ $regexes[$_list][$key] = array();
foreach($value as $_key => $_value) {
- get_blocklist_add($regexs[$_list][$key], $_key, $_value);
+ get_blocklist_add($regexes[$_list][$key], $_key, $_value);
}
} else {
- get_blocklist_add($regexs[$_list], $key, $value);
+ get_blocklist_add($regexes[$_list], $key, $value);
}
}
unset($blocklist[$_list]);
}
}
- if ($list == '') {
- return $regexs; // ALL
- } else if (isset($regexs[$list])) {
- return $regexs[$list];
- } else {
+ if ($list === '') {
+ return $regexes; // ALL
+ } else if (isset($regexes[$list])) {
+ return $regexes[$list];
+ } else {
return array();
}
}
return $blocked;
}
-// Simple example for badhost (not used now)
-function is_badhost($hosts = array(), $asap = TRUE, $bool = TRUE)
-{
- $list = get_blocklist('list');
- $blocked = blocklist_distiller($hosts, array_keys($list), $asap);
- foreach($list as $key=>$type){
- if (! $type) unset($blocked[$key]); // Ignore goodhost etc
- }
-
- return $bool ? ! empty($blocked) : $blocked;
-}
-
-
// Default (enabled) methods and thresholds (for content insertion)
function check_uri_spam_method($times = 1, $t_area = 0, $rule = TRUE)
{
// Simple/fast spam check
function check_uri_spam($target = '', $method = array())
{
- if (! is_array($method) || empty($method)) {
- $method = check_uri_spam_method();
- }
+ // Return value
$progress = array(
+ 'method' => array(
+ // Theme to do => Dummy, optional value, or optional array()
+ //'quantity' => 8,
+ //'uniqhost' => TRUE,
+ //'non_uniqhost'=> 3,
+ //'non_uniquri' => 3,
+ //'badhost' => TRUE,
+ //'area_anchor' => 0,
+ //'area_bbcode' => 0,
+ //'uri_anchor' => 0,
+ //'uri_bbcode' => 0,
+ ),
'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,
+ // Theme => Volume found (int)
+ ),
+ 'is_spam' => array(
+ // Flag. If someting defined here,
+ // one or more spam will be included
+ // in this report
+ ),
+ 'blocked' => array(
+ // Hosts blocked
+ //'category' => array(
+ // 'host',
+ //)
+ ),
+ 'hosts' => array(
+ // Hosts not blocked
),
- 'is_spam' => array(),
- 'method' => & $method,
- 'remains' => array(),
- 'error' => array(),
);
+
+ // Aliases
$sum = & $progress['sum'];
$is_spam = & $progress['is_spam'];
- $remains = & $progress['remains'];
- $error = & $progress['error'];
+ $progress['method'] = & $method; // Argument
+ $blocked = & $progress['blocked'];
+ $hosts = & $progress['hosts'];
$asap = isset($method['asap']);
- // Recurse
+ // Init
+ if (! is_array($method) || empty($method)) {
+ $method = check_uri_spam_method();
+ }
+ foreach(array_keys($method) as $key) {
+ if (! isset($sum[$key])) $sum[$key] = 0;
+ }
+
if (is_array($target)) {
foreach($target as $str) {
- // Recurse
- $_progress = check_uri_spam($str, $method);
- $_sum = & $_progress['sum'];
- $_is_spam = & $_progress['is_spam'];
- $_remains = & $_progress['remains'];
- $_error = & $_progress['error'];
+ if (! is_string($str)) continue;
+
+ $_progress = check_uri_spam($str, $method); // Recurse
+
+ // Merge $sum
+ $_sum = & $_progress['sum'];
foreach (array_keys($_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][$_key];
- }
- }
+ if (! isset($sum[$key])) {
+ $sum[$key] = & $_sum[$key];
} else {
- $is_spam[$key] = TRUE;
+ $sum[$key] += $_sum[$key];
}
}
- foreach ($_remains as $key=>$value) {
- foreach ($value as $_key=>$_value) {
- if (is_int($_key)) {
- $remains[$key][] = $_value;
- } else {
- $remains[$key][$_key] = $_value;
- }
- }
+
+ // Merge $is_spam
+ $_is_spam = & $_progress['is_spam'];
+ foreach (array_keys($_is_spam) as $key) {
+ $is_spam[$key] = TRUE;
+ if ($asap) break;
}
- if (! empty($_error)) $error += $_error;
if ($asap && $is_spam) break;
+
+ // Merge only
+ $blocked = array_merge_recursive($blocked, $_progress['blocked']);
+ $hosts = array_merge_recursive($hosts, $_progress['hosts']);
}
+
+ // Unique values
+ $blocked = array_unique_recursive($blocked);
+ $hosts = array_unique_recursive($hosts);
+
+ // Recount $sum['badhost']
+ $sum['badhost'] = array_count_leaves($blocked);
+
return $progress;
}
// URI: Pickup
$pickups = uri_pickup_normalize(spam_uri_pickup($target, $method));
- //$remains['uri_pickup'] = & $pickups;
// Return if ...
if (empty($pickups)) return $progress;
if ($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'] - $sum['uniqhost'];
}
unset($list);
- if (! $asap && $hosts) {
- $remains['badhost'] = array();
- foreach ($hosts as $value) {
- $remains['badhost'][$value] = TRUE;
- }
- }
-
- if (! empty($blocked)) {
-
- //var_dump($blocked); // BADHOST detail
-
- $sum['badhost'] += array_count_leaves($blocked);
- foreach(array_keys($blocked) as $keys) {
- $is_spam['badhost'][$keys] =
- array_count_leaves($blocked[$keys]);
- }
- }
+ if (! empty($blocked)) $is_spam['badhost'] = TRUE;
}
return $progress;
return $count;
}
-// Merge two leaves
-function array_merge_leaves($array1 = array(), $array2 = array())
+// An array-leaves to a flat array
+function array_flat_leaves($array, $unique = TRUE)
{
- return array_merge_recursive($array1, $array2);
+ if (! is_array($array)) return $array;
+
+ $tmp = array();
+ foreach(array_keys($array) as $key) {
+ if (is_array($array[$key])) {
+ // Recurse
+ foreach(array_flat_leaves($array[$key]) as $_value) {
+ $tmp[] = $_value;
+ }
+ } else {
+ $tmp[] = & $array[$key];
+ }
+ }
+
+ return $unique ? array_values(array_unique($tmp)) : $tmp;
}
+// An array() to an array leaf
+function array_leaf($array = array('A', 'B', 'C.D'), $stem = FALSE, $edge = array())
+{
+ $leaf = array();
+ $tmp = & $leaf;
+ foreach($array as $arg) {
+ if (! is_string($arg) && ! is_int($arg)) continue;
+ $tmp[$arg] = array();
+ $parent = & $tmp;
+ $tmp = & $tmp[$arg];
+ }
+ if ($stem) {
+ $parent[key($parent)] = & $edge;
+ } else {
+ $parent = key($parent);
+ }
+
+ return $leaf; // array('A' => array('B' => 'C.D'))
+}
+
+
// ---------------------
// Reporting
-// TODO: Don't show unused $method!
// Summarize $progress (blocked only)
function summarize_spam_progress($progress = array(), $blockedonly = FALSE)
{
$method = & $progress['method'];
if (isset($progress['sum'])) {
foreach ($progress['sum'] as $key => $value) {
- if (isset($method[$key])) {
+ if (isset($method[$key]) && $value) {
$tmp[] = $key . '(' . $value . ')';
}
}
return implode(', ', $tmp);
}
+function summarize_detail_badhost($progress = array())
+{
+ if (! isset($progress['blocked']) || empty($progress['blocked'])) return '';
+
+ // Flat per group
+ $blocked = array();
+ foreach($progress['blocked'] as $list => $lvalue) {
+ foreach($lvalue as $group => $gvalue) {
+ $flat = implode(', ', array_flat_leaves($gvalue));
+ if ($flat === $group) {
+ $blocked[$list][] = $flat;
+ } else {
+ $blocked[$list][$group] = $flat;
+ }
+ }
+ }
+
+ // Shrink per list
+ // From: 'A-1' => array('ie.to')
+ // To: 'A-1' => 'ie.to'
+ foreach($blocked as $list => $lvalue) {
+ if (is_array($lvalue) &&
+ count($lvalue) == 1 &&
+ is_numeric(key($lvalue))) {
+ $blocked[$list] = current($lvalue);
+ }
+ }
+
+ return var_export_shrink($blocked, TRUE, TRUE);
+}
+
+function summarize_detail_newtral($progress = array())
+{
+ if (! isset($progress['hosts']) ||
+ ! is_array($progress['hosts']) ||
+ empty($progress['hosts'])) return '';
+
+ $result = '';
+ if (FALSE) {
+ // Sort by domain
+ $tmp = array();
+ foreach($progress['hosts'] as $value) {
+ $tmp[delimiter_reverse($value)] = $value;
+ }
+ ksort($tmp, SORT_STRING);
+ $result = count($tmp) . ' (' .implode(', ', $tmp) . ')';
+ } else {
+ $tmp = array();
+ foreach($progress['hosts'] as $value) {
+ $tmp = array_merge_recursive(
+ $tmp,
+ array_leaf(explode('.', delimiter_reverse($value)), TRUE, $value)
+ );
+ }
+
+//var_dump($tmp);
+// TODO: IP address 1.2.3.4 => "0"-3-2-1 by array_shrinkbranch_leaves()
+
+ array_shrinkbranch_leaves($tmp, '.', TRUE); // "domain.tld"
+ array_joinbranch_leaf($tmp, '.', 0, TRUE);
+ foreach($tmp as $key => $value) {
+ if (is_array($value)) {
+ ksort($tmp[$key], SORT_STRING);
+ $tmp[$key] = implode(', ', array_flat_leaves($value));
+ }
+ }
+ ksort($tmp, SORT_STRING);
+
+ $result = var_export_shrink($tmp, TRUE, TRUE);
+ }
+
+ return $result;
+}
+
+
+function array_joinbranch_leaf(& $array, $delim = '.', $limit = 0, $reverse = FALSE)
+{
+ $result = array();
+
+ if (! is_array($array)) return $result; // Nothing to do
+
+ $limit = max(0, intval($limit));
+ $cstack = array();
+
+ foreach(array_keys($array) as $key) {
+ $kstack = array();
+ $k = -1;
+
+ $single = array($key => & $array[$key]); // Keep it single
+ $cursor = & $single;
+ while(is_array($cursor) && count($cursor) == 1) { // Once
+ ++$k;
+ $kstack[] = key($cursor);
+ $cursor = & $cursor[$kstack[$k]];
+ if ($limit != 0 && $k == $limit) break;
+ }
+
+ // Relink
+ if ($k != 0) {
+ if ($reverse) $kstack = array_reverse($kstack);
+ $joinkey = implode($delim, $kstack);
+
+ unset($array[$key]);
+ $array[$joinkey] = & $cursor;
+ $result[$joinkey] = $k + 1; // Key seems not an single array => joined length
+ }
+ }
+
+ return $result;
+}
+//$a = array(array()); //=> array()
+//$a = array('F' => array('B' => array('C' => array('d' => array('' => '6')))));
+//$b = array('R' => array('S' => array('T' => array('U' => array('' => '7')))));
+//$a = array('I' => $a, '@' => $b);
+//$a = array('F' => array(5), 0 => array('H'));
+//echo "<br>";
+//var_dump(array_joinbranch_leaf($a, '#', 0, 0));
+//var_export($a);
+//echo "<br>";
+//echo "<br>";
+
+
+// array('A' => array('B' => 'C')) to
+// array('A.B' => 'C')
+// array(
+// 'A' => array(
+// 'B' => array(
+// 'C' => array(
+// 'D' => '1'
+// ),
+// ),
+// ),
+// 'G' => array(
+// 'H' => '2'
+// ),
+// )
+// to
+// array (
+// 'G.H' => '2',
+// 'A.B.C.D' => '1',
+// )
+function array_shrinkbranch_leaves(& $array, $delim = '.', $reverse = FALSE, $recurse = FALSE)
+{
+ $result = 0;
+ if (! is_array($array) || empty($array)) return $result;
+
+ foreach(array_keys($array) as $key) {
+ $branch = & $array[$key];
+ if (! is_array($branch) || empty($branch)) continue;
+
+ foreach(array_keys($branch) as $bkey) {
+ $joinkey = $reverse ?
+ $bkey . $delim . $key :
+ $key . $delim . $bkey;
+ $array[$joinkey] = & $branch[$bkey];
+ unset($array[$key]);
+ ++$result;
+ }
+ }
+
+ // Rescan (Recurse)
+ if ($recurse && $result) {
+ $result = array_shrinkbranch_leaves($array, $delim, $reverse, $recurse);
+ }
+
+ return $result; // Tell me how many
+}
+//$a = array (
+// 'edu' => array (
+// 'berkeley' => array (
+// 'polisci' => array (
+// '' => 'polisci.berkeley.edu',
+// ),
+// ),
+// 'cmich' => array (
+// 'rso' => array (
+// '' => 'rso.cmich.edu',
+// ),
+// ),
+// ),
+//);
+//array_shrinkbranch_leaves($a, '.', TRUE);
+//var_export($a);
+
+//$a = array (
+// '4' => array (
+// '5' => array (
+// '6' => array (
+// '' => '7.8.9',
+// ),
+// ),
+// ),
+//);
+//array_shrinkbranch_leaves($a, '.', TRUE);
+//var_export($a);
+
+
// ---------------------
// Exit
+// Freeing memories
+function spam_dispose()
+{
+ get_blocklist(NULL);
+}
+
// Common bahavior for blocking
// NOTE: Call this function from various blocking feature, to disgueise the reason 'why blocked'
function spam_exit($mode = '', $data = array())
{
+
+ $exit = TRUE;
switch ($mode) {
- case '': echo("\n"); break;
+ case '':
+ echo("\n");
+ break;
case 'dump':
echo('<pre>' . "\n");
echo htmlspecialchars(var_export($data, TRUE));
break;
};
- // Force exit
- exit;
+ if ($exit) exit; // Force exit
}
{
$progress = check_uri_spam($target, $method);
- if (! empty($progress['is_spam'])) {
- // Mail to administrator(s)
+ if (empty($progress['is_spam'])) {
+ spam_dispose();
+ } else {
+ $target = string($target, 0); // Removing "\0" etc
pkwk_spamnotify($action, $page, $target, $progress, $method);
-
- // Exit
spam_exit($exitmode, $progress);
}
}
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']))
- ) .
- ')';
- }
+
+ $tmp = summarize_detail_badhost($progress);
+ if ($tmp != '') $summary['DETAIL_BADHOST'] = $tmp;
+
+ $tmp = summarize_detail_newtral($progress);
+ if (! $asap && $tmp != '') $summary['DETAIL_NEUTRAL_HOST'] = $tmp;
+
$summary['COMMENT'] = $action;
$summary['PAGE'] = '[blocked] ' . (is_pagename($page) ? $page : '');
$summary['URI'] = get_script_uri() . '?' . rawurlencode($page);
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