/ul>

<h1 id="EVP_RAND-CHAINING">EVP_RAND CHAINING</h1>

<p>An EVP_RAND instance can be used as the entropy source of another EVP_RAND instance, provided it has itself access to a valid entropy source. The EVP_RAND instance which acts as entropy source is called the <i>parent</i>, the other instance the <i>child</i>. Typically, the child will be a DRBG because it does not make sense for the child to be an entropy source.</p>

<p>This is called chaining. A chained EVP_RAND instance is created by passing a po