Cipher class abstract

A cipher that supports encrypt() and decrypt().

Available algorithms

• AesCbc
• AesCtr
• AesGcm
• Chacha20
• Chacha20.poly1305Aead
• Xchacha20
• Xchacha20.poly1305Aead

Example

An example of using AesCtr and Hmac:

import 'package:cryptography_plus/cryptography_plus.dart';

Future<void> main() async {
  final message = <int>[1,2,3];

  // AES-CTR with 128 bit keys and HMAC-SHA256 authentication.
  final algorithm = AesCtr.with128bits(
    macAlgorithm: Hmac.sha256(),
  );
  final secretKey = await algorithm.newSecretKey();
  final nonce = algorithm.newNonce();

  // Encrypt
  final secretBox = await algorithm.encrypt(
    message,
    secretKey: secretKey,
  );
  print('Nonce: ${secretBox.nonce}')
  print('Ciphertext: ${secretBox.cipherText}')
  print('MAC: ${secretBox.mac.bytes}')

  // Decrypt
  final clearText = await algorithm.decrypt(
    secretBox,
    secretKey: secretKey,
  );
  print('Cleartext: $clearText');
}