File: /home/mmickelson/theflexguy.com/wp-content/plugins/wp-hashcash/wp-hashcash.php
<?php
/*
Plugin Name: WordPress Hashcash
Plugin URI: http://wordpress-plugins.feifei.us/hashcash/
Description: Client-side javascript blocks all spam bots. XHTML 1.1 compliant.
Author: Elliott Back
Author URI: http://elliottback.com
Version: 4.6
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
*/
function wphc_option($save = false){
if($save) {
if( function_exists( 'update_site_option' ) ) {
update_site_option('plugin_wp-hashcash', $save);
} else {
update_option('plugin_wp-hashcash', $save);
}
return $save;
} else {
if( function_exists( 'get_site_option' ) ) {
$options = get_site_option('plugin_wp-hashcash');
} else {
$options = get_option('plugin_wp-hashcash');
}
if(!is_array($options))
$options = array();
return $options;
}
}
/**
* Install WP Hashcash
*/
function wphc_install () {
// set our default options
$options = wphc_option();
$options['comments-spam'] = $options['comments-spam'] || 0;
$options['comments-ham'] = $options['comments-ham'] || 0;
$options['signups-spam'] = $options['signups-spam'] || 0;
$options['signups-ham'] = $options['signups-ham'] || 0;
$options['key'] = array();
$options['key-date'] = 0;
$options['refresh'] = 60 * 60 * 24 * 7;
$options['signup_active'] = 1;
$options['comments_active'] = 1;
$options['attribution'] = 1;
// akismet compat check
if(function_exists('akismet_init')){
$options['moderation'] = 'akismet';
} else {
$options['moderation'] = 'moderate';
}
// validate ip / url
$options['validate-ip'] = true;
$options['validate-url'] = true;
// logging
$options['logging'] = true;
// update the key
wphc_option($options);
wphc_refresh();
}
add_action('activate_wp-hashcash/wp-hashcash.php', 'wphc_install');
add_action('activate_wp-hashcash.php', 'wphc_install');
/**
* Update the key, if needed
*/
function wphc_refresh(){
$options = wphc_option();
if( !isset( $options[ 'signup_active' ] ) ) {
wphc_install();
return;
}
if(time() - $options['key-date'] > $options['refresh']) {
if(count($options['key']) >= 5)
array_shift($options['key']);
array_push($options['key'], rand(21474836, 2126008810));
$options['key-date'] = time();
wphc_option($options);
}
}
add_action('shutdown', 'wphc_refresh');
/**
* Our plugin can also have a widget
*/
function get_spam_ratio( $ham, $spam ) {
if($spam + $ham == 0)
$ratio = 0;
else
$ratio = round(100 * ($spam/($ham+$spam)),2);
return $ratio;
}
function widget_ratio($options){
$signups_ham = (int)$options['signups-ham'];
$signups_spam = (int)$options['signups-spam'];
$ham = (int)$options['comments-ham'];
$spam = (int)$options['comments-spam'];
$ratio = get_spam_ratio( $ham, $spam );
$signups_ratio = get_spam_ratio( $signups_ham, $signups_spam );
$msg = "<li><span>$spam spam comments blocked out of $ham human comments. " . $ratio ."% of your comments are spam!</span></li>";
if( $signups_ham && $signups_spam )
$msg = "<li><span>$signups_spam spam signups blocked out of $signups_ham human signups. " . $signups_ratio ."% of your signups are spam!</span></li>";
return $msg;
}
/**
* Admin Options
*/
add_action('admin_menu', 'wphc_add_options_to_admin');
function wphc_add_options_to_admin() {
if( function_exists( 'is_site_admin' ) && !is_site_admin() )
return;
if (function_exists('add_options_page')) {
if( function_exists( 'is_site_admin' ) ) {
add_submenu_page('wpmu-admin.php', __('WordPress Hashcash'), __('WordPress Hashcash'), 'manage_options', 'wphc_admin', 'wphc_admin_options');
} else {
add_options_page('Wordpress Hashcash', 'Wordpress Hashcash', 8, basename(__FILE__), 'wphc_admin_options');
}
}
}
function wphc_admin_options() {
if( function_exists( 'is_site_admin' ) && !is_site_admin() )
return;
$options = wphc_option();
if( !isset( $options[ 'signup_active' ] ) ) {
wphc_install(); // MU has no activation hook
$options = wphc_option();
}
// POST HANDLER
if($_POST['wphc-submit']){
check_admin_referer( 'wphc-options' );
if ( function_exists('current_user_can') && !current_user_can('manage_options') )
die('Current user not authorized to managed options');
$options['refresh'] = strip_tags(stripslashes($_POST['wphc-refresh']));
$options['moderation'] = strip_tags(stripslashes($_POST['wphc-moderation']));
$options['validate-ip'] = strip_tags(stripslashes($_POST['wphc-validate-ip']));
$options['validate-url'] = strip_tags(stripslashes($_POST['wphc-validate-url']));
$options['logging'] = strip_tags(stripslashes($_POST['wphc-logging']));
$options['signup_active'] = (int) $_POST['signup_active'];
$options['comments_active'] = (int) $_POST['comments_active'];
wphc_option($options);
}
// MAIN FORM
echo '<style type="text/css">
.wrap h3 { color: black; background-color: #e5f3ff; padding: 4px 8px; }
.sidebar {
border-right: 2px solid #e5f3ff;
width: 200px;
float: left;
padding: 0px 20px 0px 10px;
margin: 0px 20px 0px 0px;
}
.sidebar input {
background-color: #FFF;
border: none;
}
.main {
float: left;
width: 600px;
}
.clear { clear: both; }
</style>';
echo '<div class="wrap">';
echo '<div class="sidebar">';
echo '<h3>Plugin</h3>';
echo '<ul>
<li><a href="http://wordpress-plugins.feifei.us/hashcash/">Plugin\'s Homepage</a></li>';
if( function_exists( 'is_site_admin' ) && is_site_admin() ) {
echo '<li><a href="http://mu.wordpress.org/forums/">WordPress MU Forums</a></li>';
}
echo '<li><a href="http://wordpress.org/tags/wp-hashcash">Plugin Support Forum</a></li>';
echo '</ul>';
echo '<h3>Donation</h3>';
echo '<center><form action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_s-xclick">
<input style="border:none;" type="image" src="https://www.paypal.com/en_US/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
<img alt="" border="0" src="https://www.paypal.com/en_US/i/scr/pixel.gif" width="1" height="1">
<input type="hidden" name="encrypted" value="-----BEGIN PKCS7-----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-----END PKCS7-----"></form></center>';
echo '<p>Any small donation would be highly appreciated.</p>';
echo '<h3>Miscellaneous</h3>';
echo '<ul>
<li><a href="http://wordpress-plugins.feifei.us/">Elliott\'s WP Plugins</a></li>
<li><a href="http://ocaoimh.ie/wordpress-plugins/">Donncha\'s WP Plugins</a></li>
</ul>';
echo '<h3>Statistics</h3>';
echo '<p>'.widget_ratio($options).'</p>';
echo '</div>';
echo '<div class="main">';
echo '<h2>WordPress Hashcash</h2>';
echo '<p>This is an antispam plugin that eradicates spam signups on WordPress sites. It works because your visitors must use obfuscated
javascript to submit a proof-of-work that indicates they opened your website in a web browser, not a robot. You can read more about it on the
<a href="http://wordpress-plugins.feifei.us/hashcash/">WordPress Hashcash plugin page</a> of my site.</p>';
echo '<h3>Standard Options</h3>';
echo '<form method="POST" action="?page=' . $_GET[ 'page' ] . '&updated=true">';
wp_nonce_field('wphc-options');
if( function_exists( 'is_site_admin' ) ) { // MU only
$signup_active = (int)$options[ 'signup_active' ];
$comments_active = (int)$options[ 'comments_active' ];
echo "<p><label>Signup protection enabled: <input type='checkbox' name='signup_active' value='1' " . ( $signup_active == '1' ? ' checked' : '' ) . " /></label></p>";
echo "<p><label>Comments protection enabled: <input type='checkbox' name='comments_active' value='1' " . ( $comments_active == '1' ? ' checked' : '' ) . " /></label></p>";
}
// moderation options
$moderate = htmlspecialchars($options['moderation'], ENT_QUOTES);
echo '<p><label for="wphc-moderation">' . __('Moderation:', 'wp-hashcash') . '</label>';
echo '<select id="wphc-moderation" name="wphc-moderation">';
echo '<option value="moderate"'.($moderate=='moderate'?' selected':'').'>Moderate</option>';
echo '<option value="akismet"'.($moderate=='akismet'?' selected':'').'>Akismet</option>';
echo '<option value="delete"'.($moderate=='delete'?' selected':'').'>Delete</option>';
echo '</select>';
echo '<br/><span style="color: grey; font-size: 90%;">The default is to place spam comments into the
akismet/moderation queue. Otherwise, the delete option will immediately discard spam comments.</span>';
echo '</p>';
// refresh interval
$refresh = htmlspecialchars($options['refresh'], ENT_QUOTES);
echo '<p><label for="wphc-refresh">' . __('Key Expiry:', 'wp-hashcash').'</label>
<input style="width: 200px;" id="wphc-refresh" name="wphc-refresh" type="text" value="'.$refresh.'" />
<br/><span style="color: grey; font-size: 90%;">Default is one week, or <strong>604800</strong> seconds.</p>';
// current key
echo '<p>Your current key is <strong>' . $options['key'][count($options['key']) - 1] . '</strong>.';
if(count($options['key']) > 1)
echo ' Previously you had keys '. join(', ', array_reverse(array_slice($options['key'], 0, count($options['key']) - 1))).'.';
echo '</p>';
// additional options
echo '<h3>Additional options:</h3>';
$validate_ip = htmlspecialchars($options['validate-ip'], ENT_QUOTES);
echo '<p><label for="wphc-validate-ip">Validate IP Address</label>
<input name="wphc-validate-ip" type="checkbox" id="wphc-validate-ip"'.($validate_ip?' checked':'').'/>
<br /><span style="color: grey; font-size: 90%;">
Checks if the IP address of the trackback sender is equal to the IP address of the webserver the trackback URL is referring to.</span></p>';
$validate_url = htmlspecialchars($options['validate-url'], ENT_QUOTES);
echo '<p><label for="wphc-validate-url">Validate URL</label>
<input name="wphc-validate-url" type="checkbox" id="wphc-validate-url"'.($validate_url?' checked':'').'/>
<br /><span style="color: grey; font-size: 90%;">Retrieves the web page located at the URL included
in the trackback to check if it contains a link to your blog. If it does not, it is spam!</span></p>';
// logging options
echo '<h3>Logging:</h3>';
$logging = htmlspecialchars($options['logging'], ENT_QUOTES);
echo '<p><label for="wphc-logging">Logging</label>
<input name="wphc-logging" type="checkbox" id="wphc-logging"'.($logging?' checked':'').'/>
<br /><span style="color: grey; font-size: 90%;">Logs the reason why a given comment failed the spam
check into the comment body. Works only if moderation / akismet mode is enabled.</span></p>';
echo '<input type="hidden" id="wphc-submit" name="wphc-submit" value="1" />';
echo '<input type="submit" id="wphc-submit-override" name="wphc-submit-override" value="Save WP Hashcash Settings"/>';
echo '</form>';
echo '</div>';
echo '<div class="clear">';
echo '<p style="text-align: center; font-size: .85em;">© Copyright '.date('Y').' <a href="http://elliottback.com">Elliott Bäck</a></p>';
echo '</div>';
echo '</div>';
}
/**
* Add JS to the header
*/
function wphc_posthead() {
if( function_exists( 'is_site_admin' ) ) {
$options = wphc_option();
if( !$options['comments_active'] )
return;
}
if((is_single() || is_page()))
wphc_addhead();
}
add_action('wp_head', 'wphc_posthead');
function wphc_signuphead() {
if( function_exists( 'is_site_admin' ) ) {
$options = wphc_option();
if( !$options['signup_active'] )
return;
}
wphc_addhead();
}
add_action('signup_header', 'wphc_signuphead');
function wphc_addhead() {
echo "<script type=\"text/javascript\"><!--\n";
echo 'function addLoadEvent(func) {
if( typeof jQuery != \'undefined\' ) {
jQuery(document).ready( func );
} else if( typeof Prototype != \'undefined\' ) {
Event.observe( window, \'load\', func );
} else {
var oldonload = window.onload;
if (typeof window.onload != \'function\') {
window.onload = func;
} else {
window.onload = function() {
if (oldonload)
oldonload();
func();
}
}
}
}
';
echo wphc_getjs() . "\n";
echo "addLoadEvent(function(){var el=document.getElementById('wphc_value');if(el)el.value=wphc();});\n";
echo "//--></script>\n";
}
function wphc_getjs(){
$options = wphc_option();
$val = $options['key'][count($options['key']) - 1];
$js = 'function wphc_compute(){';
switch(rand(0, 3)){
/* Addition of n times of field value / n, + modulus:
Time guarantee: 100 iterations or less */
case 0:
$inc = rand($val / 100, $val - 1);
$n = floor($val / $inc);
$r = $val % $inc;
$js .= "var wphc_eax = $inc; ";
for($i = 0; $i < $n - 1; $i++){
$js .= "wphc_eax += $inc; ";
}
$js .= "wphc_eax += $r; ";
$js .= 'return wphc_eax; ';
break;
/* Conversion from binary:
Time guarantee: log(n) iterations or less */
case 1:
$binval = strrev(base_convert($val, 10, 2));
$js .= "var wphc_eax = \"$binval\"; ";
$js .= 'var wphc_ebx = 0; ';
$js .= 'var wphc_ecx = 0; ';
$js .= 'while(wphc_ecx < wphc_eax.length){ ';
$js .= 'if(wphc_eax.charAt(wphc_ecx) == "1") { ';
$js .= 'wphc_ebx += Math.pow(2, wphc_ecx); ';
$js .= '} ';
$js .= 'wphc_ecx++; ';
$js .= '} ';
$js .= 'return wphc_ebx;';
break;
/* Multiplication of square roots:
Time guarantee: constant time */
case 2:
$sqrt = floor(sqrt($val));
$r = $val - ($sqrt * $sqrt);
$js .= "return $sqrt * $sqrt + $r; ";
break;
/* Sum of random numbers to the final value:
Time guarantee: log(n) expected value */
case 3:
$js .= 'return ';
$i = 0;
while($val > 0){
if($i++ > 0)
$js .= '+';
$temp = rand(1, $val);
$val -= $temp;
$js .= $temp;
}
$js .= ';';
break;
}
$js .= '} wphc_compute();';
// pack bytes
if( !function_exists( 'strToLongs' ) ) {
function strToLongs($s) {
$l = array();
// pad $s to some multiple of 4
$s = preg_split('//', $s, -1, PREG_SPLIT_NO_EMPTY);
while(count($s) % 4 != 0){
$s [] = ' ';
}
for ($i = 0; $i < ceil(count($s)/4); $i++) {
$l[$i] = ord($s[$i*4]) + (ord($s[$i*4+1]) << 8) + (ord($s[$i*4+2]) << 16) + (ord($s[$i*4+3]) << 24);
}
return $l;
}
}
// xor all the bytes with a random key
$key = rand(21474836, 2126008810);
$js = strToLongs($js);
for($i = 0; $i < count($js); $i++){
$js[$i] = $js[$i] ^ $key;
}
// libs function encapsulation
$libs = "function wphc(){\n";
// write bytes to javascript, xor with key
$libs .= "\tvar wphc_data = [".join(',',$js)."]; \n";
// do the xor with key
$libs .= "\n\tfor (var i=0; i<wphc_data.length; i++){\n";
$libs .= "\t\twphc_data[i]=wphc_data[i]^$key;\n";
$libs .= "\t}\n";
// convert bytes back to string
$libs .= "\n\tvar a = new Array(wphc_data.length); \n";
$libs .= "\tfor (var i=0; i<wphc_data.length; i++) { \n";
$libs .= "\t\ta[i] = String.fromCharCode(wphc_data[i] & 0xFF, wphc_data[i]>>>8 & 0xFF, ";
$libs .= "wphc_data[i]>>>16 & 0xFF, wphc_data[i]>>>24 & 0xFF);\n";
$libs .= "\t}\n";
$libs .= "\n\treturn eval(a.join('')); \n";
// call libs function
$libs .= "}";
// return code
return $libs;
}
/**
* Hook into the signups form
*/
function wphc_add_signupform(){
echo '<input type="hidden" id="wphc_value" name="wphc_value" value=""/>';
}
add_action('signup_hidden_fields', 'wphc_add_signupform');
add_action('bp_after_registration_submit_buttons', 'wphc_add_signupform');
function wphc_add_commentform(){
$options = wphc_option();
switch($options['moderation']){
case 'delete':
$verb = 'deleted';
break;
case 'akismet':
$verb = 'queued in Akismet';
break;
case 'moderate':
default:
$verb = 'placed in moderation';
break;
}
echo '<div><input type="hidden" id="wphc_value" name="wphc_value" value=""/></div>';
echo '<noscript><div><small>Wordpress Hashcash needs javascript to work, but your browser has javascript disabled. Your comment will be '.$verb.'!</small></div></noscript>';
}
add_action('comment_form', 'wphc_add_commentform');
/**
* Validate our tag
*/
function wphc_check_signup_hidden_tag( $result ) {
// get our options
$options = wphc_option();
$spam = false;
if( !strpos( $_SERVER[ 'PHP_SELF' ], 'wp-signup.php' ) )
return $result;
// Check the wphc values against the last five keys
$spam = !in_array($_POST["wphc_value"], $options['key']);
if($spam){
$options['signups-spam'] = ((int) $options['signups-spam']) + 1;
wphc_option($options);
$result['errors']->add( 'blogname', __('You did not pass a spam check. Please enable JavaScript in your browser.') );
} else {
$options['signups-ham'] = ((int) $options['signups-ham']) + 1;
wphc_option($options);
}
return $result;
}
add_filter( 'wpmu_validate_blog_signup', 'wphc_check_signup_hidden_tag' );
add_filter( 'wpmu_validate_user_signup', 'wphc_check_signup_hidden_tag' );
function wphc_check_signup_for_bp(){
global $bp;
// get our options
$options = wphc_option();
$spam = false;
// Check the wphc values against the last five keys
$spam = !in_array($_POST["wphc_value"], $options['key']);
if($spam){
$options['signups-spam'] = ((int) $options['signups-spam']) + 1;
wphc_option($options);
$bp->signup->errors['spam'] = __('You did not pass a spam check. Please enable JavaScript in your browser.');
} else {
$options['signups-ham'] = ((int) $options['signups-ham']) + 1;
wphc_option($options);
}
}
add_action('bp_signup_validate', 'wphc_check_signup_for_bp');
function wphc_error_hook_register_page(){
do_action('bp_spam_errors');
}
add_action('bp_before_register_page', 'wphc_error_hook_register_page');
function wphc_check_hidden_tag($comment) {
// admins can do what they like
if( is_admin() )
return $comment;
// get our options
$type = $comment['comment_type'];
$options = wphc_option();
$spam = false;
if($type == "trackback" || $type == "pingback"){
// check the website's IP against the url it's sending as a trackback
if($options['validate-ip']){
$server_ip = isset($_SERVER['HTTP_X_FORWARDED_FOR']) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : $_SERVER['REMOTE_ADDR'];
$web_ip = gethostbyname(parse_url($comment['comment_author_url'], PHP_URL_HOST));
$ipv = $server_ip != $web_ip;
$spam = $spam || ($ipv);
if($options['logging'] && $ipv) $comment['comment_content'] .= "\n\n[WORDPRESS HASHCASH] The comment's server IP (".$server_ip.") doesn't match the"
. " comment's URL host IP (".$web_ip.") and so is spam.";
}
// look for our link in the page itself
if(!$spam && $options['validate-url']){
if(!class_exists('Snoopy'))
require_once( ABSPATH . WPINC . '/class-snoopy.php' );
$permalink = get_permalink($comment['comment_post_ID']);
$permalink = preg_replace('/\/$/', '', $permalink);
$snoop = new Snoopy;
if (@$snoop->fetchlinks($comment['comment_author_url'])){
$found = false;
if( !empty( $snoop->results ) )
{
foreach($snoop->results as $url){
$url = preg_replace('/(\/|\/trackback|\/trackback\/)$/', '', $url);
if($url == $permalink)
$found = true;
}
}
if($options['logging'] && !$found)
$comment['comment_content'] .= "\n\n[WORDPRESS HASHCASH] The comment's actual post text did not contain your blog url (".$permalink.") and so is spam.";
$spam = $spam || !$found;
} else {
$spam = true;
if($options['logging'])
$comment['comment_content'] .= "\n\n[WORDPRESS HASHCASH] Snoopy failed to fetch results for the comment blog url (".$comment['comment_author_url'].") with error '".$snoop->error."' and so is spam.";
}
}
} else {
// Check the wphc values against the last five keys
$spam = !in_array($_POST["wphc_value"], $options['key']);
if($options['logging'] && $spam)
$comment['comment_content'] .= "\n\n[WORDPRESS HASHCASH] The poster sent us '".intval($_POST["wphc_value"])." which is not a hashcash value.";
}
if($spam){
$options['comments-spam'] = ((int) $options['comments-spam']) + 1;
wphc_option($options);
switch($options['moderation']){
case 'delete':
add_filter('comment_post', create_function('$id', 'wp_delete_comment($id); die(\'This comment has been deleted by WP Hashcash\');'));
break;
case 'akismet':
add_filter('pre_comment_approved', create_function('$a', 'return \'spam\';'));
break;
case 'moderate':
default:
add_filter('pre_comment_approved', create_function('$a', 'return 0;'));
break;
}
} else {
$options['comments-ham'] = ((int) $options['comments-ham']) + 1;
wphc_option($options);
}
return $comment;
}
add_filter('preprocess_comment', 'wphc_check_hidden_tag');
?>