Decrypt a JWE with a Private Key

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.SetPrivateKey, which sets the private key used to decrypt a recipient of a loaded JWE.

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();

  // Load the JWE compact serialization to be decrypted.
  final jweCompact = 'eyJhbGciOiJBMjU2S1ciLCJlbmMiOiJBMjU2R0NNIn0.<...>.<iv>.<ciphertext>.<tag>';
  try {
    jwe.loadJwe(jweCompact);
  } 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 private key.
  final privKey = CkPrivateKey();
  try {
    privKey.loadPemFile('qa_data/recipient_privkey.pem');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Set the private key used to decrypt recipient 0.
  try {
    jwe.setPrivateKey(0, privKey);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final String content;
  try {
    content = jwe.decrypt(0, 'utf-8');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print(content);
}