@deftypefun {int} {gnutls_x509_trust_list_get_issuer_by_subject_key_id} (gnutls_x509_trust_list_t @var{list}, const gnutls_datum_t * @var{dn}, const gnutls_datum_t * @var{spki}, gnutls_x509_crt_t * @var{issuer}, unsigned int @var{flags})
@var{list}: The list

@var{dn}: is the issuer's DN (may be @code{NULL} )

@var{spki}: is the subject key ID

@var{issuer}: Will hold the issuer if any. Should be deallocated after use.

@var{flags}: Use zero

This function will find the issuer with the given name and subject key ID, and
return a copy of the issuer, which must be freed using @code{gnutls_x509_crt_deinit()} .

@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS}  (0) is returned, otherwise a
negative error value.

@strong{Since:} 3.4.2
@end deftypefun