cipherlib

Implementations of cryptographic algorithms for encryption and decryption in Dart.

Depencencies

There are only 2 dependencies used by this package:

• hashlib
• hashlib_codecs

Features

Getting started

The following import will give you access to all of the algorithms in this package.

import 'package:cipherlib/cipherlib.dart';

Check the API Reference for details.

Usage

Examples can be found inside the example folder.

import 'dart:convert';

import 'package:cipherlib/cipherlib.dart';
import 'package:hashlib_codecs/hashlib_codecs.dart';

void main() {
  print('----- XOR -----');
  {
    var key = [0x54];
    var inp = [0x03, 0xF1];
    var cipher = xor(inp, key);
    var plain = xor(cipher, key);
    print('  Text: ${toBinary(inp)}');
    print('   Key: ${toBinary(key)}');
    print('   XOR: ${toBinary(cipher)}');
    print(' Plain: ${toBinary(plain)}');
  }

  print('----- ChaCha20 -----');
  {
    var text = "Hide me!";
    var key = fromHex(
        "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f");
    var nonce = fromHex("00000000000000004a00000000000000");
    var res = chacha20poly1305(utf8.encode(text), key, nonce: nonce);
    var plain = chacha20(res.message, key, nonce);
    print('  Text: $text');
    print('   Key: ${toHex(key)}');
    print(' Nonce: ${toHex(nonce)}');
    print('Cipher: ${toHex(res.message)}');
    print('   Tag: ${res.mac.hex()}');
    print(' Plain: ${utf8.decode(plain)}');
  }

  print('----- Salsa20 -----');
  {
    var text = "Hide me!";
    var key = fromHex(
        "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f");
    var nonce = fromHex("00000000000000004a00000000000000");
    var res = salsa20poly1305(utf8.encode(text), key, nonce: nonce);
    var plain = salsa20(res.message, key);
    print('  Text: $text');
    print('   Key: ${toHex(key)}');
    print(' Nonce: ${toHex(nonce)}');
    print('Cipher: ${toHex(res.message)}');
    print('   Tag: ${res.mac.hex()}');
    print(' Plain: ${utf8.decode(plain)}');
  }
}

Benchmarks

Libraries:

• Cipherlib : https://pub.dev/packages/cipherlib
• PointyCastle : https://pub.dev/packages/pointycastle
• Cryptography : https://pub.dev/packages/cryptography

With 5MB message (10 iterations):

With 1KB message (5000 iterations):

With 10B message (100000 iterations):

All benchmarks are done on AMD Ryzen 7 5800X processor and 3200MHz RAM using compiled exe

Dart SDK version: 3.3.3 (stable) (Tue Mar 26 14:21:33 2024 +0000) on "windows_x64"