title: Smart Card eToken PRO CardOS/M4 Digital Signature APDU
body: <p>I've got a sample from eToken SDK that generates RSA keys, creates digital signature and verifies it.
  The algorithm in the sample is the following:</p>
  
  <ul>
  <li>generate RSA keys (GENERATE_KEY_PAIR);</li>
  <li>create security environment for signature (PUT_DATA_SECI);</li>
  <li>restore security environment (MSE RESTORE);</li>
  <li>sign data (PSO_CDS);</li>
  <li>create security environment for verification (PUT_DATA_SECI);</li>
  <li>restore security environment (MSE RESTORE);</li>
  <li>verify signature (PDO_VDS).</li>
  </ul>
  
  <p>I have imported external key containers with certificates to token and I need to get rid of RSA key generation item in algorithm. 
  How may I find Object ID of my private key to pass it to PUT_DATA_SECI APDU command? </p>