@deftypefun {int} {gnutls_x509_crt_get_spki} (gnutls_x509_crt_t @var{cert}, gnutls_x509_spki_t @var{spki}, unsigned int @var{flags})
@var{cert}: a certificate of type @code{gnutls_x509_crt_t} 

@var{spki}: a SubjectPublicKeyInfo structure of type @code{gnutls_x509_spki_t} 

@var{flags}: must be zero

This function will return the public key information of an X.509
certificate. The provided  @code{spki} must be initialized.

@strong{Since:} 3.6.0
@end deftypefun