generate shared secret using Elliptic Curve Diffie–Hellman Key Exchange (ECDH). </p>
<p>The private key used to generate the shared secret is internal DevAK private key which is determined by the subsystem from where the command is originating.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">InstancePtr</td><td>Pointer to the client instance </td></tr>
    <tr><td class="paramname">PubKey</td><td>Pointer to the buffer which contains the public key to b