signBlock method
Implementation
List<int> signBlock(final /* BigInt | Iterable<int> */ message) {
BigInt input;
if (message is BigInt) {
input = message;
} else if (message is Iterable<int>) {
input = _convertInput(message);
} else {
throw ArgumentError('Unknown type');
}
final signedBigInt = input.modPow(_key.d, _key.n);
return bigIntToBytes(signedBigInt);
}