X509_STORE_set_verify_cb, X509_STORE_CTX_cert_crl_fn, X509_STORE_CTX_check_crl_fn, X509_STORE_CTX_check_issued_fn, X509_STORE_CTX_check_policy_fn, X509_STORE_CTX_check_revocation_fn, X509_STORE_CTX_cleanup_fn, X509_STORE_CTX_get_crl_fn, X509_STORE_CTX_get_issuer_fn, X509_STORE_CTX_lookup_certs_fn, X509_STORE_CTX_lookup_crls_fn - set verification callback</p>

<h1 id="SYNOPSIS">SYNOPSIS</h1>

<pre><code>#include &lt;openssl/x509_vfy.h&gt;

typedef int (*X509_STORE_CTX_get_issuer_fn)(X509 **issuer,
          