um number of seconds to wait until the transfer is complete. A value of 0 enables waiting indefinitely, while a value &lt; 0 immediately leads to a timeout condition.</p>

<p>X509_http_nbio() and X509_CRL_http_nbio() are macros for backward compatibility that have the same effect as the functions above but with infinite timeout and without the possibility to specify custom BIOs.</p>

<h1 id="RETURN-VALUES">RETURN VALUES</h1>

<p>On success the function yield the loaded value, else NULL. Error conditions inc