public static ECDsaParameters CreateNewECDsaParameters(KeyStrength strength)
{
using var provider = ECDsa.Create();
var curve = ECDsaParameters.ChooseCurve(strength);
provider.GenerateKey(curve);
return(new ECDsaParameters(provider.ExportParameters(true), strength, ECDsaParameters.ChooseHashAlgo(curve)));
}
private static bool VerifyStream(Stream dataStream, TagSignature signature, ECParameters parameters)
{
try {
if (signature.Required().Algorithm != Algorithm.EcDSA)
{
throw new InvalidDataException($"Signature uses different algorithm {signature.Algorithm} from this ECDsa key!");
}
if (parameters.D == null)
{
throw new InvalidDataException($"This ECDsa key is not properly configured to be able to verify a signature!");
}
using var algo = OpenWith(parameters);
return(algo.VerifyData(dataStream, signature.Data, ECDsaParameters.ChooseHashAlgo(parameters.Curve).ToName()));
} catch (CryptographicException e) {
throw new InterlockLedgerCryptographicException("Failed to verify data with current parameters and signature", e);
}
}