int pageant_enum_keys(pageant_key_enum_fn_t callback, void *callback_ctx,
char **retstr);
int pageant_delete_key(struct pageant_pubkey *key, char **retstr);
int pageant_enum_keys(pageant_key_enum_fn_t callback, void *callback_ctx,
char **retstr);
int pageant_delete_key(struct pageant_pubkey *key, char **retstr);