ecEncrypt function

Uint8List ecEncrypt(dynamic data, dynamic publicKey)

Implementation

Uint8List ecEncrypt(data, publicKey) {
  if (!(data is Uint8List) && !(data is String)) {
    throw "'data' must be a string or Uint8List";
  }

  if (!(publicKey is Uint8List) && !(publicKey is String)) {
    throw "'publicKey' must be a string or Uint8List";
  }

  if (data is String) {
    if (isHex(data)) {
      data = hexToUint8List(data);
    } else {
      data = Uint8List.fromList(utf8.encode(data));
    }
  }

  if (publicKey is String) {
    if (isHex(publicKey)) {
      publicKey = hexToUint8List(publicKey);
    } else {
      throw "'publicKey' must be an hexadecimal string";
    }
  }

  Uint8List curveBuf = publicKey.sublist(0, 1);
  Uint8List pubBuf = publicKey.sublist(1, publicKey.length);

  switch (curveBuf[0]) {
    case 0:
      try {
        Uint8List curve25519Pub =
            sodium.Sodium.cryptoSignEd25519PkToCurve25519(pubBuf);
        return sodium.Sodium.cryptoBoxSeal(data, curve25519Pub);
      } catch (e) {
        print(e);
      }
      return Uint8List(0);
    case 1:

    case 2:

    default:
      throw "Curve not supported";
  }
}