Dart

AES Encryption ECB Mode with PKCS7 Padding

See more Encryption Examples

Duplicates the following C# code:

public static byte[] DecryptBySymmetricKey(string encryptedText, byte[] key)
  {
     string keyAsBase64 = Convert.ToBase64String(key);

     byte[] dataToDecrypt = Convert.FromBase64String(encryptedText);
     var keyBytes = key;
     AesManaged tdes = new AesManaged();
     tdes.KeySize = 256;
     tdes.BlockSize = 128;
     tdes.Key = keyBytes;
     tdes.Mode = CipherMode.ECB;
     tdes.Padding = PaddingMode.PKCS7;
     ICryptoTransform decrypt__1 = tdes.CreateDecryptor();
     byte[] deCipher = decrypt__1.TransformFinalBlock(dataToDecrypt, 0, dataToDecrypt.Length);
     tdes.Clear();
     string EK_result = Convert.ToBase64String(deCipher);
     return EK_result;
}

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();

  // In the C# code above that is to be duplicated here, use the base64 encoded key.
  final keyAsBase64 = '...';
  final encryptedBytesAsBase64 = '....';

  crypt.keyLength = 256;
  crypt.cryptAlgorithm = 'AES';
  crypt.cipherMode = 'ecb';
  crypt.paddingScheme = 0;
  crypt.setEncodedKey(keyAsBase64, 'base64');

  crypt.encodingMode = 'base64';

  // Pass the base64 representation of the encrypted data.
  // (The EncodingMode indicates you are passing base64.)
  final ekResult = crypt.decryptStringENC(encryptedBytesAsBase64);

  print(ekResult);
}