Sign a JWS with a Certificate

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetSigningCert, which sets the certificate whose associated private key is used to create a signature.

The file path is relative to the application's current working directory. An absolute path may also be used. Supply the path appropriate to your own environment.

import 'package:chilkat/chilkat.dart';

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

  // Protected header specifying RSASSA-PKCS1-v1_5 with SHA-256 (RS256).
  final header = CkJsonObject();
  header.updateString('alg', 'RS256');
  try {
    jws.setProtectedHeader(0, header);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

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

  // The file path is relative to the application's current working directory.  An absolute path
  // may also be used.  Supply the path appropriate to your own environment.
  // The PFX password should come from a secure source rather than being hard-coded.
  final pfxPassword = 'myPfxPassword';

  // Load a certificate that has an associated private key, then set it as the signing certificate for
  // signature 0.  The certificate's private key is used to create the signature.
  final cert = CkCert();
  try {
    cert.loadPfxFile('qa_data/signer.pfx', pfxPassword);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  try {
    jws.setSigningCert(0, cert);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final String jwsCompact;
  try {
    jwsCompact = jws.createJws();
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print(jwsCompact);
}