Horde::isConnectionSecure PHP Method

    public static function isConnectionSecure()
    {
        global $browser, $conf, $registry;
        if ($browser->usingSSLConnection()) {
            return true;
        }
        if (!empty($conf['safe_ips'])) {
            if (reset($conf['safe_ips']) == '*') {
                return true;
            }
            /* $_SERVER['HTTP_X_FORWARDED_FOR'] is user data and not
             * reliable. We don't consult it for safe IPs. We also have to
             * assume that if it is present, the user is coming through a proxy
             * server. If so, we don't count any non-SSL connection as safe, no
             * matter the source IP. */
            $remote = $registry->remoteHost();
            if (!$remote->proxy) {
                foreach ($conf['safe_ips'] as $safe_ip) {
                    $safe_ip = preg_replace('/(\\.0)*$/', '', $safe_ip);
                    if (strpos($remote->addr, $safe_ip) === 0) {
                        return true;
                    }
                }
            }
        }
        return false;
    }

/**
 * Encryption tests.
 */
function showPassphrase($memo)
{
    global $notification;
    if (!$memo['body'] instanceof Mnemo_Exception) {
        return false;
    }
    /* Check for secure connection. */
    $secure_check = Horde::isConnectionSecure();
    if ($memo['body']->getCode() == Mnemo::ERR_NO_PASSPHRASE) {
        if ($secure_check) {
            $notification->push(_("This note has been encrypted, please provide the password."), 'horde.message');
            return true;
        }
        $notification->push(_("This note has been encrypted, and cannot be decrypted without a secure web connection"), 'horde.error');
        $memo['body'] = '';
        return false;
    }
    if ($memo['body']->getCode() == Mnemo::ERR_DECRYPT) {
        if ($secure_check) {
            $notification->push(_("This note cannot be decrypted:") . ' ' . $memo['body']->getMessage(), 'horde.message');
            return true;
        }
        $notification->push(_("This note has been encrypted, and cannot be decrypted without a secure web connection"), 'horde.error');
        $memo['body'] = '';
        return false;
    }
    $notification->push($memo['body'], 'horde.error');
    $memo['body'] = '';
    return false;
}