cryptoBox method
Implementation
int cryptoBox(Uint8List c, Uint8List m, int /*long*/ d, Uint8List n,
Uint8List y, Uint8List x) {
Uint8List k = Uint8List(32);
///L/og.d(TAG, "cryptoBox start ...");
cryptoBoxBeforenm(k, y, x);
return cryptoBoxAfternm(c, m, d, n, k);
}