pgp_key_t pgp_ask_for_key (char *, char *, short, pgp_ring_t);
pgp_key_t pgp_get_candidates (pgp_ring_t, string_list_t *);
pgp_key_t pgp_getkeybyaddr (address_t *, short, pgp_ring_t);
pgp_key_t pgp_ask_for_key (char *, char *, short, pgp_ring_t);
pgp_key_t pgp_get_candidates (pgp_ring_t, string_list_t *);
pgp_key_t pgp_getkeybyaddr (address_t *, short, pgp_ring_t);