mple, if the input type is set to <code>DER</code>, a PEM to DER decoder will be ignored.</p>

<p>The input type can also be NULL, which means that the caller doesn&#39;t know what type of input they have. In this case, OSSL_DECODER_from_bio() will simply try with one decoder implementation after the other, and thereby discover what kind of input the caller gave it.</p>

<p>For every decoding done, even an intermediary one, a constructor provided by the caller is called to attempt to construct an appropriat