285 lines
10 KiB
PHP
285 lines
10 KiB
PHP
<?php
|
|
require '/var/www/html/vendor/phpmailer/phpmailer/PHPMailerAutoload.php';
|
|
|
|
$timer_start = microtime(true); // Start counter for PHP execution time tracking
|
|
|
|
$codemod = 2138367; // modificator with which the confirmation ID will be obfuscated
|
|
$output = "";
|
|
$selfurl = "http://pmpc.mehl.mx/cgi/sign.php"; // absolute URL of this PHP script
|
|
$db = "/usr/share/blog/data/signatures/signatures.json"; // Signature database path
|
|
$ipdb = "/usr/share/blog/data/signatures/ips.json"; // IP database path
|
|
$spamdb = "/usr/share/blog/data/signatures/spammer_" . date('Y-m-d') . ".json"; // This day's potential spammer database
|
|
|
|
///////////////////
|
|
/// SPAM CHECKS ///
|
|
///////////////////
|
|
|
|
// Test whether visitor fell for honeypot
|
|
$honeypot = isset($_POST['url']) ? $_POST['url'] : false;
|
|
if (! empty($honeypot)) { // honeypot input field isn't empty
|
|
$output .= "Invalid input. Error code: 5|°4m";
|
|
show_page($output, 1);
|
|
}
|
|
|
|
// Check whether IP submitted too often
|
|
$limit_hits = 5; // Max. X hits...
|
|
$limit_time = 180; // in X seconds
|
|
$limit_spam = 15; // More than X hits in $limit_time will get this IP to a special DB
|
|
$limit_exceeded = FALSE; // Will be set TRUE if more hits with this IP in $limit_time than $limit_hits
|
|
$now = time(); // Current UNIX time
|
|
$ip = sha1(php_uname() . $_SERVER['REMOTE_ADDR']); // Hashed IP of visitor
|
|
read_ips($ipdb);
|
|
|
|
$ip_unknown = TRUE;
|
|
foreach ($ips as $key => &$entry) {
|
|
if ($now - $limit_time > $entry['time']) { // Delete entries that are older than $limit_time
|
|
unset($ips[$key]);
|
|
} else if ($entry['ip'] === $ip) { // IP matches, and entry under $limit_time
|
|
$ip_unknown = FALSE;
|
|
if ($entry['hits'] >= $limit_hits) { // Try limit exceeded, iterate and set abort variable
|
|
$entry['hits'] = $entry['hits'] + 1;
|
|
$limit_exceeded = TRUE;
|
|
if ($entry['hits'] > $limit_spam) { // IP exceeds spam limit
|
|
if (! file_exists($spamdb)) { touch($spamdb); }
|
|
$realip = $_SERVER['REMOTE_ADDR'];
|
|
$spammer = file_get_contents($spamdb);
|
|
$pattern = preg_quote($realip);
|
|
if (! preg_match("/$pattern/", $spammer, $match)) {
|
|
file_put_contents($spamdb, $realip . "\n", FILE_APPEND | LOCK_EX);
|
|
}
|
|
}
|
|
} else { // Try limit not exceeded, just iterate
|
|
$entry['hits'] = $entry['hits'] + 1;
|
|
}
|
|
}
|
|
}
|
|
// Extend IP database if this IP was unknown
|
|
if ($ip_unknown) {
|
|
$ips[] = array("time" => $now, "ip" => $ip, "hits" => 1);
|
|
}
|
|
// Write IP database back to file
|
|
file_put_contents($ipdb, json_encode($ips, JSON_PRETTY_PRINT), LOCK_EX);
|
|
unset($ips);
|
|
|
|
// Abort if IP limit is exceeded
|
|
if ($limit_exceeded) {
|
|
$output .= "Too many submits with your IP. Please try again in a few minutes.";
|
|
show_page($output, 1);
|
|
}
|
|
|
|
///////////////////////
|
|
/// FORM EVALUATION ///
|
|
///////////////////////
|
|
|
|
// Get basic info from form
|
|
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
|
|
$action = isset($_POST['action']) ? $_POST['action'] : false;
|
|
} else {
|
|
$action = isset($_GET['action']) ? $_GET['action'] : false;
|
|
}
|
|
|
|
// Continue only if action = sign/confirmation
|
|
// Depending on action, get important variables
|
|
if(empty($action)) {
|
|
$output .= "No action defined.";
|
|
show_page($output, 1);
|
|
} else if ($action === "sign") { // sign
|
|
$name = isset($_POST['name']) ? $_POST['name'] : false;
|
|
$email = isset($_POST['email']) ? $_POST['email'] : false;
|
|
$country = isset($_POST['country']) ? $_POST['country'] : false;
|
|
$zip = isset($_POST['zip']) ? $_POST['zip'] : false;
|
|
$permPriv = isset($_POST['permissionPriv']) ? $_POST['permissionPriv'] : false;
|
|
$permNews = isset($_POST['permissionNews']) ? $_POST['permissionNews'] : false;
|
|
$permPub = isset($_POST['permissionPub']) ? $_POST['permissionPub'] : false;
|
|
|
|
// Check for missing required fields
|
|
if(empty($name) || empty($email) || empty($permPriv)) {
|
|
$output .= "At least one required variable is empty.";
|
|
show_page($output, 1);
|
|
}
|
|
} else if ($action === "confirm") { // confirm
|
|
$confirmcode = isset($_GET['code']) ? $_GET['code'] : false;
|
|
$confirmid = isset($_GET['id']) ? $_GET['id'] : false;
|
|
|
|
// Check for missing required fields
|
|
if(empty($confirmcode) || empty($confirmid)) {
|
|
$output .= "Confirmation code or ID is missing.";
|
|
show_page($output, 1);
|
|
}
|
|
} else { // invalid
|
|
$output .= "Invalid action.";
|
|
show_page($output, 1);
|
|
}
|
|
|
|
// Validate input
|
|
//TODO
|
|
|
|
///////////////
|
|
/// SIGNING ///
|
|
///////////////
|
|
if ($action === "sign") {
|
|
read_db($db);
|
|
|
|
// Test whether email is a duplicate
|
|
$total = count($data);
|
|
for ($row = 0; $row < $total; $row++) {
|
|
if ($email === $data[$row]['email']) {
|
|
$output .= "We already received a signature with this email address.";
|
|
show_page($output, 1);
|
|
}
|
|
}
|
|
|
|
// Take sequential ID
|
|
$id = $total;
|
|
// Create a random string for email verification
|
|
$code = rand(1000000000,9999999999) . uniqid();
|
|
$codeid = $id + $codemod; // this is to obfuscate the real ID of the user if we don't want to publish this number
|
|
|
|
// Append new signature to array
|
|
$data[] = array("id" => $id,
|
|
"name" => $name,
|
|
"email" => $email,
|
|
"country" => $country,
|
|
"zip" => $zip,
|
|
"permPriv" => $permPriv,
|
|
"permNews" => $permNews,
|
|
"permPub" => $permPub,
|
|
"code" => $code,
|
|
"confirmed" => "no");
|
|
|
|
// Encode to JSON again and write to file
|
|
$allsig = json_encode($data, JSON_PRETTY_PRINT);
|
|
file_put_contents($db, $allsig, LOCK_EX);
|
|
unset($allsig);
|
|
|
|
$mail = new PHPMailer;
|
|
|
|
$mail->isSMTP();
|
|
$mail->Host = "mail.fsfe.org";
|
|
$mail->setFrom('noreply@fsfe.org', 'Public Money, Public Code');
|
|
|
|
// Send email asking for confirmation
|
|
$mail->addAddress($email)
|
|
$mail->Subject = "One step left to sign the \"Public Money - Public Code\" letter";
|
|
$mail->Body = "Dear $name, \r\n\r\n" .
|
|
"Thank you for signing the open \"Public Money - Public Code\" letter! \r\n\r\n" .
|
|
"In order to confirm your signature, please visit following link:\r\n" .
|
|
"$selfurl?action=confirm&id=$codeid&code=$code \r\n\r\n" .
|
|
"If your confirmation succeeds, your signature will appear on the website within the next few hours.";
|
|
|
|
$mail->Send()
|
|
|
|
$output .= "Thank you for signing our open letter! <br /><br />";
|
|
$output .= "We just sent an email to your address ($email) for you to confirm your signature.";
|
|
show_page($output, 0);
|
|
|
|
} else if ($action === "confirm") {
|
|
////////////////////
|
|
/// CONFIRMATION ///
|
|
////////////////////
|
|
|
|
$id = $confirmid - $codemod; // substract the obfuscation number from the given ID
|
|
|
|
if ($id < 0) { // $confirmid is less than $codemod
|
|
$output .= "Invalid signature ID.";
|
|
show_page($output, 1);
|
|
}
|
|
|
|
read_db($db);
|
|
|
|
if (empty($data[$id])) { // there is no array element with this ID
|
|
$output .= "The signature ID does not exist.";
|
|
show_page($output, 1);
|
|
}
|
|
|
|
$email = $data[$id]['email']; // Get the user's email in case we need it
|
|
$code = $data[$id]['code']; // The confirmation code according to the DB
|
|
$confirmed = $data[$id]['confirmed']; // The current confirmation status
|
|
|
|
// Check whether the confirmation code is what we saved in the DB
|
|
if ($confirmed === "no") {
|
|
if ($confirmcode === $code) {
|
|
// Set the user's confirmation key to "yes"
|
|
$data[$id]['confirmed'] = "yes";
|
|
// Encode to JSON again and write to file
|
|
$allsig = json_encode($data, JSON_PRETTY_PRINT); // TODO: JSON_PRETTY_PRINT could be turned off to make file smaller
|
|
file_put_contents($db, $allsig, LOCK_EX);
|
|
unset($allsig);
|
|
|
|
$output .= "Your email address has been confirmed. <br /><br />";
|
|
$output .= "Thank you for signing the open letter! Your signature will appear <a href='/signatures/'>in the signature list</a> within the next hours.";
|
|
show_page($output, 0);
|
|
|
|
} else {
|
|
$output .= "The provided confirmation code is incorrect.";
|
|
show_page($output, 1);
|
|
}
|
|
} else if ($confirmed === "yes") {
|
|
$output .= "This email address is already confirmed. It can take a few hours until your signature appears <a href='/signatures/'>in the signature list</a>.";
|
|
show_page($output, 1);
|
|
} else {
|
|
$output .= "This signature ID does not exist or the confirmation status is broken.";
|
|
show_page($output, 1);
|
|
}
|
|
|
|
} // END confirm
|
|
|
|
|
|
////////////////
|
|
// FUNCTIONS ///
|
|
////////////////
|
|
|
|
// Read signatures database (should only be called if really needed)
|
|
function read_db($db) {
|
|
global $data; // declare $data a global variable to access it outside this function
|
|
if (! file_exists($db)) {
|
|
touch($db);
|
|
}
|
|
$file = file_get_contents($db, true);
|
|
$data = json_decode($file, true);
|
|
unset($file);
|
|
}
|
|
|
|
// Read IP database
|
|
function read_ips($ipdb) {
|
|
global $ips; // declare $data a global variable to access it outside this function
|
|
if (! file_exists($ipdb)) {
|
|
touch($ipdb);
|
|
}
|
|
$file = file_get_contents($ipdb, true);
|
|
$ips = json_decode($file, true);
|
|
unset($file);
|
|
}
|
|
|
|
// Replace a given placeholder in a template HTML page with given content
|
|
function replace_page($template, $placeholder, $content){
|
|
$vars = array($placeholder=>$content);
|
|
return str_replace(array_keys($vars), $vars, $template);
|
|
}
|
|
|
|
// Show the filled template page, depending on exit code
|
|
function show_page($output, $exit) {
|
|
if ($exit === 0) {
|
|
$headline = "Success";
|
|
$notice = "";
|
|
} else if ($exit === 1) {
|
|
$headline = "Error";
|
|
$notice = "<p>This error could have happened because one or more fields contained invalid information. Please try again. If you think that you see this error by mistake, please contact us.</p>";
|
|
} else {
|
|
$headline = "Thank you";
|
|
}
|
|
$template = file_get_contents('../template/index.html', true);
|
|
$page = replace_page($template, ':HEADLINE:', $headline);
|
|
$page = replace_page($page, ':BODY1:', $output);
|
|
$page = replace_page($page, ':BODY2:', $notice);
|
|
echo $page;
|
|
unset($data);
|
|
|
|
// PHP execution time tracking
|
|
global $timer_start;
|
|
echo "<!-- PHP execution time: " . (microtime(true) - $timer_start)*1000 . " ms -->\n";
|
|
|
|
exit($exit);
|
|
}
|
|
?>
|