site/signup-handler.php

174 lines
5.4 KiB
PHP

<?php
function getUserIpAddr() {
if(!empty($_SERVER['HTTP_CLIENT_IP'])) {
//ip from share internet
$ip = $_SERVER['HTTP_CLIENT_IP'];
} elseif(!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
//ip pass from proxy
$ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
} else {
$ip = $_SERVER['REMOTE_ADDR'];
}
return $ip;
}
function add_ban_info($name, $email) {
$user_ip = getUserIpAddr();
$user_info = "$name - $email - $user_ip";
file_put_contents("/var/signups_banned", $user_info.PHP_EOL, FILE_APPEND);
}
function forbidden_name($name) {
return in_array(
$name,
array_merge(
file("/var/signups_forbidden", FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES),
file("/var/signups_current", FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES),
file("/var/banned_names.txt", FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES)
)
);
}
function forbidden_email($email) {
$femail = file("/var/banned_emails.txt", FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
return in_array($email, $femail);
}
function forbidden_sshkey($sshkey) {
$fsshkey = file("/var/banned_sshkeys.txt", FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
foreach ($fsshkey as $line_num => $line) {
$fsk_line = explode(' ',trim($line));
$fsk[] = $fsk_line[1];
}
$sk = explode(' ',trim($sshkey));
return in_array($sk[1], $fsk);
}
$message = '';
if (isset($_REQUEST["username"]) && isset($_REQUEST["email"])) {
$email = $_REQUEST["email"];
$mailTo = 'hostmaster@envs.net';
$mailFrom = "$email";
$mailSubject = 'Signup User Space - envs.net';
$headers[] = 'MIME-Version: 1.0';
$headers[] = 'Content-type: text/plain; charset=utf-8';
$headers[] = "From: $mailFrom";
//$headers[] = "Cc: $mailFrom";
$name = trim($_REQUEST["username"]);
if ($name == "")
$message .= "<li>fill in your desired username</li>\n";
else {
if (strlen($name) < 2)
$message .= "<li>username is too short (2 character min)</li>\n";
if (strlen($name) > 32)
$message .= "<li>username too long (32 character max)</li>\n";
if (strlen($name) > 1 && !preg_match('/^[a-z][a-z0-9]{1,31}$/', $name))
$message .= "<li>username contains invalid characters (lowercase only, must start with a letter).</li>\n";
if (posix_getpwnam($name) || forbidden_name($name))
$message .= "<li>sorry, the username $name is unavailable</li>\n";
}
$email = trim($_REQUEST["email"]);
$emailconfirm = trim($_REQUEST["emailconfirm"]);
if ($email == "")
$message .= "<li>fill in your email address</li>\n";
else {
if ($email != $emailconfirm)
$message .= "<li>email does not match</li>\n";
elseif (!filter_var($email, FILTER_VALIDATE_EMAIL))
$message .= "<li>invalid email format</li>\n";
elseif ($name != "" && forbidden_email($email)) {
$message .= "<li>your email is banned!</li>\n";
add_ban_info($name, $email);
}
}
$interest = $_REQUEST["interest"];
if ($interest == "")
$message .= "<li>explain why you're interested so we can make sure you're a real human being</li>\n";
else {
if (strlen($interest) < 50)
$message .= "<li>interests explanation is too short (50 character min)</li>\n";
}
$sshkey = trim($_REQUEST["sshkey"]);
if ($sshkey == "")
$message .= "<li>ssh pubkey required: please submit the public key.</li>\n";
elseif (substr($sshkey, 0, 4) !== "ssh-" && substr($sshkey, 0, 3) !== "sk-" && substr($sshkey, 0, 5) !== "ecdsa")
$message .= "<li>ssh pubkey looks not correct.</li>\n";
else {
if ($name != "" && $email != "") {
if (forbidden_sshkey($sshkey)) {
$message .= "<li>your sshkey is banned!</li>\n";
add_ban_info($name, $email);
}
}
}
if ($_REQUEST["c_age"] == "")
$message .= "<li>you must be at least 16 years old to use this service.</li>\n";
if ($_REQUEST["iagree"] == "")
$message .= "<li>you need to agree to our terms.</li>\n";
// no validation errors
if ($message == "") {
$makeuser = "/usr/local/bin/envs_user_manage add {$_REQUEST["username"]} {$_REQUEST["email"]} \"{$sshkey}\"";
$msgbody = "
username: {$_REQUEST["username"]}
email: {$_REQUEST["email"]}
reason:
{$_REQUEST["interest"]}
$makeuser
";
$mailSent = @mail($mailTo, $mailSubject, $msgbody, implode("\r\n", $headers));
if($mailSent == TRUE) {
// temp. add to forbidden to prevent double signups (cleanup after user creation)
file_put_contents("/var/signups_current", $name.PHP_EOL, FILE_APPEND);
// save signup
file_put_contents("/var/signups", $makeuser.PHP_EOL, FILE_APPEND);
echo '<pre class="alert">
Sent your message <big><em>successfully</em></big>!
Please allow up to 24 hours for a response with login instructions!</pre>';
} else {
echo '<pre class="alert">
something went wrong... :(
please send an email to <a href="mailto:hostmaster@envs.net">hostmaster&#64;envs.net</a> with details of what happened.</pre>';
}
} else {
?>
<div class="alert">
<h3><i class="fa fa-exclamation-triangle fa-fw" aria-hidden="true"></i> notice:</h3>
<p></p>
<ul>
<?=$message?>
</ul>
</div>
<?php
}
}
?>