@deftypefun {int} {gnutls_pubkey_get_openpgp_key_id} (gnutls_pubkey_t @var{key}, unsigned int @var{flags}, unsigned char * @var{output_data}, size_t * @var{output_data_size}, unsigned int * @var{subkey})
@var{key}: Holds the public key

@var{flags}: should be one of the flags from @code{gnutls_keyid_flags_t} 

@var{output_data}: will contain the key ID

@var{output_data_size}: holds the size of output_data (and will be
replaced by the actual size of parameters)

@var{subkey}: ignored

This function is no-op.

@strong{Returns:} @code{GNUTLS_E_UNIMPLEMENTED_FEATURE} .

@strong{Since:} 2.12.0
@end deftypefun