Dart

Load an Ed25519 Private Key from Hex

See more Ed25519 Examples

Demonstrates how to load an Ed25519 private key from raw hex bytes.

Note: This example requires Chilkat v9.5.0.83 or greater.

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example assumes the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final privKey = CkPrivateKey();

  // We have the hexidecimal encoded bytes of the private key and public key:
  var privKeyHex = 'd4ee72dbf913584ad5b6d8f1f769f8ad3afe7c28cbf1d4fbe097a88f44755842';
  final pubKeyHex = '19bf44096984cdfe8541bac167dc3b96c85086aa30b6b6cb0c5c38ad703166e1';

  // Load these values into the Chilkat private key object:
  try {
    privKey.loadEd25519(privKeyHex, pubKeyHex);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // ---------------------------------------------------------------
  // We don't actually need the public key.  If we pass an empty string for the public key,
  // Chilkat will automatically compute it.
  final privKey2 = CkPrivateKey();
  privKey2.loadEd25519(privKeyHex, '');

  // Let's get the public key to see that it computed the same value.
  final sbPubKeyHex = CkStringBuilder();
  privKeyHex = privKey2.getRawHex(sbPubKeyHex);
  print('computed public key = ${sbPubKeyHex.getAsString()}');

  // The output should be:
  // computed public key = 19bf44096984cdfe8541bac167dc3b96c85086aa30b6b6cb0c5c38ad703166e1
}