he primary DRBG with automatic seeding enabled</h2>

<p>Calling RAND_poll() or RAND_add() is not necessary, because the DRBG pulls the necessary entropy from its source automatically. However, both calls are permitted, and do reseed the RNG.</p>

<p>RAND_add() can be used to add both kinds of random input, depending on the value of the <i>randomness</i> argument:</p>

<dl>

<dt id="randomness-0">randomness == 0:</dt>
<dd>

<p>The random bytes are mixed as additional input into the current state of the DRBG.