Dart

Encrypt / Decrypt a File and Verify it has not Changed

See more Encryption Examples

Demonstrates how to encrypt and decrypt a file, and verify it has not changed. Dart

import 'package:chilkat/chilkat.dart';

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

  final crypt = CkCrypt2();

  crypt.cryptAlgorithm = 'aes';
  crypt.cipherMode = 'cbc';
  crypt.keyLength = 128;
  crypt.paddingScheme = 0;

  final ivHex = '000102030405060708090A0B0C0D0E0F';
  crypt.setEncodedIV(ivHex, 'hex');

  final keyHex = '00010203040506071011121314151617';
  crypt.setEncodedKey(keyHex, 'hex');

  final dataFile = 'qa_data/zips/HBIQ040615300005.ZIP';
  final outFile = 'qa_output/HBIQ040615300005.enc';
  final outFile2 = 'qa_output/HBIQ040615300005.ZIP';

  crypt.ckEncryptFile(dataFile, outFile);
  crypt.ckDecryptFile(outFile, outFile2);

  final fac = CkFileAccess();
  final bEqual = fac.fileContentsEqual(dataFile, outFile2);
  if (!bEqual) {
    print('Decrypted file not equal to the original.');
  } else {
    print('Success.');
  }
}