newKeyPairFromSeed method
Generates a key pair from the seed.
This will throw UnsupportedError if the algorithm does not support seeds for private key generation.
Example
In this example, we use X25519
:
import 'dart:convert';
import 'package:cryptography/cryptography.dart';
Future<void> main() async {
// X25519 seed is any 32 bytes.
// We can use SHA256, which computes a 32-byte hash from any input.
final seed = utf8.encode('example');
final seedWith32Bytes = (await Sha256().hash(seed)).bytes;
final algorithm = X25519();
final keyPair = await algorithm.newKeyPairFromSeed(seedWith32Bytes);
}
Implementation
@override
Future<SimpleKeyPair> newKeyPairFromSeed(List<int> seed) async {
return await fallback.newKeyPairFromSeed(seed);
}