cipherlib 0.0.4

Implementations of cryptographic algorithms for encryption and decryption in Dart.

cipherlib

Implementations of cryptographic algorithms for encryption and decryption in Dart.

Features

Ciphers	Public class and methods	Source
ChaCha20	ChaCha20, chacha20, chacha20Pipe	RFC-8439
ChaCha20/Poly1305	ChaCha20Poly1305, chacha20poly1305, chacha20poly1305digest	RFC-8439
XOR	XOR, xor, xorPipe	Wikipedia

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("000000000000004a00000000");
    var result = chacha20poly1305(utf8.encode(text), key, nonce: nonce);
    var plain = chacha20poly1305(
      result.cipher,
      key,
      nonce: nonce,
      tag: result.tag.bytes,
    );
    print('  Text: $text');
    print('   Key: ${toHex(key)}');
    print(' Nonce: ${toHex(nonce)}');
    print('Cipher: ${toHex(result.cipher)}');
    print('   Tag: ${result.tag.hex()}');
    print(' Plain: ${utf8.decode(plain.cipher)}');
  }
}

Benchmarks

Libraries:

• Cipherlib : https://pub.dev/packages/cipherlib

With 5MB message (10 iterations):

Algorithms	cipherlib
XOR	235.83MB/s
ChaCha20	108.76MB/s
ChaCha20/Poly1305	76.83MB/s
ChaCha20/Poly1305(digest)	249.10MB/s

With 1KB message (5000 iterations):

Algorithms	cipherlib
XOR	257.71MB/s
ChaCha20	112.43MB/s
ChaCha20/Poly1305	74.40MB/s
ChaCha20/Poly1305(digest)	210.84MB/s

With 10B message (100000 iterations):

Algorithms	cipherlib
XOR	183.72MB/s
ChaCha20	30.74MB/s
ChaCha20/Poly1305	9.59MB/s
ChaCha20/Poly1305(digest)	14.06MB/s

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"