Dart

Extract a File from a .p7m (PKCS7 Signed-Data)

See more Encryption Examples

_LANGUAGE_ example to extract the original file from a .p7m (Signed-Data PKCS7 Format) The .p7m contains the signed contents of the original file. It can be verified and restored by calling VerifyP7M. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final crypt = CkCrypt2();

  // What is a .p7m file?

  final outputFile = '/Users/chilkat/testData/pdf/sample.pdf';
  final inFile = '/Users/chilkat/testData/p7m/sample.pdf.p7m';

  // Verify and restore the original file:
  try {
    crypt.verifyP7M(inFile, outputFile);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Success!');
}