@deftypefun {void} {gnutls_session_set_verify_cert} (gnutls_session_t @var{session}, const char * @var{hostname}, unsigned @var{flags}) @var{session}: is a gnutls session @var{hostname}: is the expected name of the peer; may be @code{NULL} @var{flags}: flags for certificate verification -- @code{gnutls_certificate_verify_flags} This function instructs GnuTLS to verify the peer's certificate using the provided hostname. If the verification fails the handshake will also fail with @code{GNUTLS_E_CERTIFICATE_VERIFICATION_ERROR} . In that case the verification result can be obtained using @code{gnutls_session_get_verify_cert_status()} . The @code{hostname} pointer provided must remain valid for the lifetime of the session. More precisely it should be available during any subsequent handshakes. If no hostname is provided, no hostname verification will be performed. For a more advanced verification function check @code{gnutls_session_set_verify_cert2()} . If @code{flags} is provided which contain a profile, this function should be called after any session priority setting functions. The @code{gnutls_session_set_verify_cert()} function is intended to be used by TLS clients to verify the server's certificate. @strong{Since:} 3.4.6 @end deftypefun