he issuer certificate <i>issuer</i>. This function must return 0 on failure (among others if <i>x</i> hasn&#39;t been issued with <i>issuer</i>) and 1 on success. <i>If no function to get the issuer is provided, the internal default function will be used instead.</i></p>

<p>X509_STORE_set_check_revocation() sets the revocation checking function. Its purpose is to look through the final chain and check the revocation status for each certificate. It must return 0 on failure and 1 on success. <i>If no functio