<?php
// Init
define('NO_AUTH_REQUIRED',true);
define('NO_AUTH_REQUIRED2',true);
header('Content-Type: text/plain; charset=utf-8');

include($_SERVER['DOCUMENT_ROOT']."/inc/main.php");

// Checking IP of incoming connection, checking is it NAT address
$ok=0;
$ip=$_SERVER['REMOTE_ADDR'];

exec (HESTIA_CMD."v-list-sys-ips json", $output, $return_var);
$output=implode('', $output);
$arr=json_decode($output, true);
foreach ($arr as $arr_key => $arr_val) {
    // search for NAT IPs and allow them
	if ($ip==$arr_key || $ip==$arr_val['NAT']) {
		$ok=1;
		break;
	}
}
if ($ip == $_SERVER['SERVER_ADDR']) $ok=1;
if ($ip == '127.0.0.1') $ok=1;
if ($ok==0) exit;
if (isset($_SERVER['HTTP_X_REAL_IP']) || isset($_SERVER['HTTP_X_FORWARDED_FOR'])) exit;


// Check arguments

if (empty($_POST['email'])) {
    echo "error email address not provided";
    exit;
}
if (empty($_POST['password'])) {
    echo "error old password provided";
    exit;
}
if (empty($_POST['new'])) {
    echo "error new password not provided";
    exit;
}

list($v_account, $v_domain) = explode('@', $_POST['email']);
$v_domain = escapeshellarg($v_domain);
$v_account = escapeshellarg($v_account);
$v_password = $_POST['password'];

// Get domain owner
exec(HESTIA_CMD . "v-search-domain-owner " . $v_domain . " 'mail'", $output, $return_var);
if ($return_var != 0 || empty($output[0])) {
    echo "error domain owner not found";
    exit;
}
$v_user = $output[0];
unset($output);


// Get current password hash (called "md5" for legacy reasons, it's not guaranteed to be md5)
exec(HESTIA_CMD . "v-get-mail-account-value " . escapeshellarg($v_user) . " " . $v_domain . " " . $v_account . " 'md5'", $output, $return_var);
if ($return_var != 0 || empty($output[0])) {
    echo "error unable to get current account password hash";
    exit;
}
$v_hash = $output[0];
unset($output);

// v_hash use doveadm password hash format, which is basically {HASH_NAME}normal_crypt_format,
// so we just need to remove the {HASH_NAME} before we can ask password_verify if its correct or not.
$hash_for_password_verify = explode('}', $v_hash, 2);
$hash_for_password_verify = end($hash_for_password_verify);
if (!password_verify($v_password, $hash_for_password_verify)) {
    die("error old password does not match");
}

// Change password
$fp = tmpfile();
$new_password_file = stream_get_meta_data($fp)['uri'];
fwrite($fp, $_POST['new'] . "\n");
exec(HESTIA_CMD . "v-change-mail-account-password " . escapeshellarg($v_user) . " " . $v_domain . " " . $v_account . " " . escapeshellarg($new_password_file), $output, $return_var);
fclose($fp);
if ($return_var == 0) {
    echo "==ok==";
    exit;
}
echo 'error v-change-mail-account-password returned non-zero: ' . $return_var;
exit;