rusty_chacha 0.1.1-dev.2

A Flutter library for fast ChaCha20-Poly1305 encryption, powered by Rust

Rusty ChaCha 💃🦀

A Flutter library for fast ChaCha20-Poly1305 encryption, leveraging the capabilities of the Rust chacha20poly1305 crate.

🚧 Under Development: Not recommended for production use. 🚧

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Features

• Encrypt and decrypt data with ChaCha20-Poly1305 (authenticated)
• Additional authenticated data (AAD)
• Optional compression using zstd

Blazingly fast 🔥

Thanks to Rust encryption and decryption with ChaCha20-Poly1305 run with at 500-1000 MiB/s. This is up to 50x faster than packages like cryptography_flutter or pointycastle.

Getting Started

• With Flutter, run flutter pub add rusty_chacha

Usage

import 'package:rusty_chacha/rusty_chacha.dart';

main() async {
  await RustyChaCha.init();


  final key = await generateChaCha20Key(); // generate a random key
  final myData = Uint8List.fromList([1, 2, 3, 4, 5]);


  // basic example:
  final myEncryptedData = await encrypt(key: key, cleartext: myData);
  final myDataAgain1 = await decrypt(key: key, ciphertext: myEncryptedData);


  // compression example:
  final myCompressedAndEncryptedData = await encrypt(
    key: key,
    cleartext: myData,
    zstdCompressionLevel: 3, // moderate compression
  );
  final myDataAgain2 = await decrypt(key: key, ciphertext: myCompressedAndEncryptedData);


  // AAD example:
  final additionalData = Uint8List.fromList([1, 2, 3]); // some additional (non-secret) data
  final myEncryptedDataWithAad = await encrypt(
    key: key,
    cleartext: myData,
    aad: additionalData, // pass it in when encrypting
  );
  final myDataAgain3 = await decrypt(
    key: key,
    ciphertext: myEncryptedDataWithAad,
    aad: additionalData, // pass it in to decrypt (decrypt will fail if additionalData is not the same)
  );
}

Supported platforms (for now)

• iOS
• MacOS
• Windows