@deftypefun {int} {gnutls_certificate_get_issuer} (gnutls_certificate_credentials_t @var{sc}, gnutls_x509_crt_t @var{cert}, gnutls_x509_crt_t * @var{issuer}, unsigned int @var{flags})
@var{sc}: is a @code{gnutls_certificate_credentials_t}  type.

@var{cert}: is the certificate to find issuer for

@var{issuer}: Will hold the issuer if any. Should be treated as constant.

@var{flags}: Use zero or @code{GNUTLS_TL_GET_COPY} 

This function will return the issuer of a given certificate.
If the flag @code{GNUTLS_TL_GET_COPY}  is specified a copy of the issuer
will be returned which must be freed using @code{gnutls_x509_crt_deinit()} .
In that case the provided  @code{issuer} must not be initialized.

As with @code{gnutls_x509_trust_list_get_issuer()}  this function requires
the @code{GNUTLS_TL_GET_COPY}  flag in order to operate with PKCS@code{11}  trust
lists in a thread-safe way.

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

@strong{Since:} 3.0
@end deftypefun