Dart Requires Chilkat v11.0.0+

Generate an ECC Key (Public and Private)

See more ECC Examples

Demonstrates how to generate an ECC key and save both public and private parts. Dart

import 'package:chilkat/chilkat.dart';

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

  // Create a Fortuna PRNG and seed it with system entropy.
  // This will be our source of random data for generating the ECC private key.
  final fortuna = CkPrng();
  final entropy = fortuna.getEntropy(32, 'base64');
  fortuna.addEntropy(entropy, 'base64');

  final ecc = CkEcc();

  // Generate a random ECC private key on the secp256r1 curve.
  // Chilkat also supports other curves, such as secp384r1, secp521r1, and secp256k1.

  final privKey = CkPrivateKey();
  try {
    ecc.genKey('secp256r1', fortuna, privKey);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Save the private key to PKCS8 encrypted PEM
  // (The private key can be saved in a variety of different formats. See the online reference documentation.)
  try {
    privKey.savePkcs8EncryptedPemFile('pemPassword', 'qa_output/eccPrivKey.pem');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
  }

  // The private key PEM looks like this:

  // 	-----BEGIN ENCRYPTED PRIVATE KEY-----
  // 	MIHFMEAGCSqGSIb3DQEFDTAzMBsGCSqGSIb3DQEFDDAOBAhUmn+1/lwCIwICCAAw
  // 	FAYIKoZIhvcNAwcECPlyNXAXZO+oBIGAIvxvTENXJWbrCwSjh0QNxLecBotUpfI5
  // 	auOonLmwVMyt1ahMmNyVo/D+pnKQSE41Fg8fApM0DCDKZUOVCCcK1qirIsMPQkGp
  // 	klPJbvrQRVYgzBtU31uNB5y2wqhrIeepal1HXBvbkUK0nfJMbcdz/XAEIQu2HhTD
  // 	t6LMScPQld4=
  // 	-----END ENCRYPTED PRIVATE KEY-----

  // Now get the public key part from the private key.
  // (A public key is actually a subset of the private key.)
  final pubKey = CkPublicKey();
  privKey.toPublicKey(pubKey);

  // Save the public key to a PEM file.
  // (The public key can be saved in a variety of different formats. See the online reference documentation.)
  // For ECC keys, the 1st argument (bPreferPkcs1) is ignored and unused.
  final bPreferPkcs1 = false;
  pubKey.savePemFile(bPreferPkcs1, 'qa_output/eccPubKey.pem');

  // The public key PEM looks like this:

  // 	-----BEGIN PUBLIC KEY-----
  // 	MIIBSzCCAQMGByqGSM49AgEwgfcCAQEwLAYHKoZIzj0BAQIhAP////8AAAABAAAA
  // 	AAAAAAAAAAAA////////////////MFsEIP////8AAAABAAAAAAAAAAAAAAAA////
  // 	///////////8BCBaxjXYqjqT57PrvVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMVAMSd
  // 	NgiG5wSTamZ44ROdJreBn36QBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt6zOg9KE5
  // 	RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8AAAAA
  // 	//////////+85vqtpxeehPO5ysL8YyVRAgEBA0IABGdOH8uM6SfX3mdV+TR0mWp2
  // 	gfVRPlxWxwhOiowuNByBxmQz7ZR4CJY1XcN2zkUo5pzW73ZhGwgd2XTOvqPqG40=
  // 	-----END PUBLIC KEY-----
  // 

  print('finished.');
}