Description:

thirds

thirds #
SHA-3, BLAKE3, and EdDSA/Ed448 implementations in Dart, with EdDSA/Ed448 JWT support
Installation #
With Dart:
dart pub add thirds
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With Flutter:
flutter pub add thirds
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Examples #
import 'dart:convert';

import 'package:thirds/sha3.dart';
import 'package:thirds/blake3.dart';
import 'package:thirds/ed448.dart' as ed448;
import 'package:thirds/jwt.dart';

main() {
// SHA-3/Keccak
sha3_224Hex(utf8.encode("abc"));
// "e642824c3f8cf24ad09234ee7d3c766fc9a3a5168d0c94ad73b46fdf"
shake_128Hex(utf8.encode("abc"), 32);
// "5881092dd818bf5cf8a3ddb793fbcba74097d5c526a6d35f97b83351940f2cc8"

// BLAKE3
blake3Hex(utf8.encode("abc"));
// "6437b3ac38465133ffb63b75273a8db548c558465d79db03fd359c6cd5bd9d85"

// EdDSA/Ed448
final secret = ed448.parseKeyString(
// Must be 57 bytes -- make sure to securely randomly generate for real
"872d093780f5d3730df7c212664b37b8a0f24f56810daa8382cd4fa3f"
"77634ec44dc54f1c2ed9bea86fafb7632d8be199ea165f5ad55dd9ce8"
);
final public = ed448.secretToPublic(secret);
print("Public key is: ${ed448.toHexString(public)}"); // View public key
final signature = ed448.sign(secret, utf8.encode("abc"));
print("Signature is: ${ed448.toHexString(signature)}");
assert(ed448.verify(public, utf8.encode("abc"), signature));

// EdDSA/Ed448 JWT
final secretHexString = (
"d204c7a9585cca8fa52ff922946046be799a4595f7db24255d9cfbe0d"
"d09056350a14d3fe705a5fa715528e4e4a3ba42990f7fdc77db266052"
);
final privateKey = OkpPrivateKey.fromSecret('Ed448', ed448.parseKeyString(secretHexString));
final encoded = jwtEncode({'test': 'data'}, key: privateKey, algorithm: 'EdDSA');
print("JWT: ${encoded}");
// Verify and decode with private key
assert(jwtDecode(encoded, key: privateKey, algorithm: 'EdDSA')['test'] == 'data');
final publicKey = OkpPublicKey.fromPublic(
'Ed448',
ed448.secretToPublic(ed448.parseKeyString(secretHexString))
);
// Verify and decode with public key
assert(jwtDecode(encoded, key: publicKey, algorithm: 'EdDSA')['test'] == 'data');
}
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See tests for examples of additional supported functionality
Running Tests #
dart --enable-asserts test/all.dart
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Licensing #
thirds is licensed under the BSD 3-Clause License.
Alternatively, thirds is available under the terms of the UNLICENSE.
Author #
Michael P. Nitowski (Email: mike@nitow.ski)
Contributing #
Contributions are welcome.

License

For personal and professional use. You cannot resell or redistribute these repositories in their original state.

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