</code> — data may be any length (default)
    </p></li><li class="listitem"><p>
    <code class="literal">none</code> — data must be multiple of cipher block size
    </p></li></ul></div><p>
  </p><p>
   So, for example, these are equivalent:
</p><pre class="programlisting">
encrypt(data, 'fooz', 'bf')
encrypt(data, 'fooz', 'bf-cbc/pad:pkcs')
</pre><p>
  </p><p>
   In <code class="function">encrypt_iv</code> and <code class="function">decrypt_iv</code>, the
   <em class="parameter"><code>iv</code></em>