er="1" class="docutils">
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<tr class="row-odd"><th class="head">Option</th>
<th class="head">Possible values</th>
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<tr class="row-even"><td>driver</td>
<td>‘mcrypt’, ‘openssl’</td>
</tr>
<tr class="row-odd"><td>cipher</td>
<td>Cipher name (see <a class="reference internal" href="#ciphers-and-modes"><span class="std std-ref">Supported encryption ciphers and modes</span></a>)</td>
</