Encrypt a JWE with a Recipient Public Key

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.SetPublicKey, which sets the public key used to encrypt for a recipient. The example uses RSA-OAEP-256 key management with AES-256-GCM content encryption.

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 jwe = CkJwe();

  // Protected header: RSA-OAEP-256 key management with AES-256-GCM content encryption.
  final header = CkJsonObject();
  header.updateString('alg', 'RSA-OAEP-256');
  header.updateString('enc', 'A256GCM');
  try {
    jwe.setProtectedHeader(header);
  } 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.
  // Load the recipient's public key.
  final pubKey = CkPublicKey();
  try {
    pubKey.loadFromFile('qa_data/recipient_pubkey.pem');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Set the public key used to encrypt for recipient 0.
  try {
    jwe.setPublicKey(0, pubKey);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final String jweCompact;
  try {
    jweCompact = jwe.encrypt('This is the secret content.', 'utf-8');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print(jweCompact);
}