title: Sieve - Login with crypted password
body: <p>I am creating webpanel for managing email accounts, aliases etc 
  and wondering how to get "Set vacation" to work.</p>
  
  <p>We are using Dovecot as IMAP-server and Pidgeonhole.</p>
  
  <p>Library that i have checked <a href="https://github.com/loconox/" rel="nofollow noreferrer">https://github.com/loconox/</a> needs </p>
  
  <pre><code>        $sieved = new \LibSieve\ManageSieve(MANAGESIEVE_HOST, 4190, MANAGESIEVE_USER, MANAGESIEVE_PASS);
          $sieved-&gt;sieve_login();
  </code></pre>
  
  <p>Dovecot uses sha512-crypt password schema, so how i can use that library without knowing plain password. </p>
  
  <p>This panel what i am creating, is allowing to admin enable/disable vacation messages for someone. </p>