change the asp.net user password while retrieving current password
<p>I'm using the <code>ChangePassword</code> method of membership provider to change the password and one of the requirement before calling the <code>ChangePassword</code> is to retrieve the current password. But I'm getting error:
padding is invalid and cannot be removed</p>

<p>below is my web.config:</p>

<pre><code>&lt;system.web&gt;
    &lt; machineKey validationKey="4FD671E39167DFB91A918018007D095E50B7D2971B01AEDE26A7233FD9CC4A470F80689997EC2C7BB515F9D82C8B4D1F3A8495193630B11E8401C96BD0A5A133"
                decryptionKey="ED1555E75C7B91738172E0086456C70B9CAA4C44214FC2B1907123993EA4FA53"
                validation="SHA1"
                decryption="AES"/&gt;
....
&lt; /system.web&gt;
</code></pre>
