Create a JWS into a StringBuilder

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.CreateJwsSb, which creates a JWS and writes it into a StringBuilder.

import 'package:chilkat/chilkat.dart';

void main() {
  final jws = CkJws();

  // Set the protected header for signer 0, specifying the signature algorithm (alg).
  final header = CkJsonObject();
  header.updateString('alg', 'HS256');
  try {
    jws.setProtectedHeader(0, header);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Set the payload to be signed.
  final bIncludeBom = false;
  try {
    jws.setPayload('This is the content to sign.', 'utf-8', bIncludeBom);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Provide the HMAC key (base64) for signer 0.  In production, obtain the key from a secure source
  // rather than hard-coding it.
  final base64Key = 'YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=';
  try {
    jws.setMacKey(0, base64Key, 'base64');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Create the JWS and write it into a StringBuilder.
  final sbJws = CkStringBuilder();
  try {
    jws.createJwsSb(sbJws);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print(sbJws.getAsString());
}