Dart

Load a Public Key from a String

Demonstrates the Chilkat PublicKey.LoadFromString method, which loads a public key from a string. The only argument is the string. Chilkat examines the content and recognizes PEM public keys, unencrypted PEM private keys (taking only the public portion), XML, JWK, and more.

Background: This is the forgiving text loader: rather than requiring you to know the exact format, it inspects whatever string you provide and figures it out. A useful convenience is that it accepts an unencrypted private key too and keeps only the public half — handy when you have a key pair but need just the public key. Use it whenever the textual format is uncertain or varies by source.

Chilkat Dart Downloads

Download Chilkat for Dart

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the PublicKey.LoadFromString method, which loads a public key from a string.  The
  // only argument is the string.  Chilkat examines the content and recognizes PEM public keys,
  // unencrypted PEM private keys (using only the public portion), XML, JWK, and more.

  final pubKey = CkPublicKey();

  // The PEM text of a public key.
  final keyText = '-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkq...IDAQAB\n-----END PUBLIC KEY-----';

  try {
    pubKey.loadFromString(keyText);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Loaded a ${pubKey.keyType} public key.');
}