Dart Requires Chilkat v11.4.0+

Example: Mime.GetDecryptCertInfo method

Demonstrates the GetDecryptCertInfo method. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  final mime = CkMime();

  // Load MIME that is has Content-Type like this:
  // Content-Type: application/pkcs7-mime; smime-type="enveloped-data"; name="smime.p7m"; smime-type="enveloped-data"
  try {
    mime.loadMimeFile('qa_data/mime/enveloped_data.eml');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Get information about the certificate that would be needed to decrypt.
  // An enveloped-data can potentially be decrypted by multiple certificates if it was encrypted in a way that allows it,
  // but in most cases, only a single certificate with associated private key (that of the message recipient) is possible.
  final json = CkJsonObject();
  try {
    mime.getDecryptCertInfo(json);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  json.emitCompact = false;
  print(json.emit());

  // Sample output:

  // {
  //   "recipientInfo": [
  //     {
  //       "serial": "****",
  //       "issuerCN": "****"
  //     }
  //   ]
  // }

  // Get each certificate's information like this:
  var serial = '';
  var issuerCN = '';

  var i = 0;
  final count = json.sizeOfArray('recipientInfo');
  while (i < count) {
    json.i = i;
    serial = json.stringOf('recipientInfo[i].serial');
    issuerCN = json.stringOf('recipientInfo[i].issuerCN');
    i++;
  }
}