pub unsafe extern "C" fn crypt_keyslot_change_by_passphrase( cd: *mut crypt_device, keyslot_old: c_int, keyslot_new: c_int, passphrase: *const c_char, passphrase_size: size_t, new_passphrase: *const c_char, new_passphrase_size: size_t) -> c_int