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_getkeybystr (char *, short, pgp_ring_t);
+pgp_key_t pgp_getkeybystr (const char *, short, pgp_ring_t);
char *pgp_findKeys (address_t * to, address_t * cc, address_t * bcc);