private static bool VerifyStream(Stream dataStream, TagSignature signature, RSAParameters parameters)
{
try {
if (signature.Required().Algorithm != Algorithm.RSA)
{
throw new InvalidDataException($"Signature uses different algorithm {signature.Algorithm} from this RSA key!");
}
if (parameters.Exponent == null || parameters.Modulus == null)
{
throw new InvalidDataException($"This RSA key is not properly configured to be able to verify a signature!");
}
using var RSAalg = OpenProvider(parameters);
return(RSAalg.VerifyData(dataStream, signature.Data, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1));
} catch (CryptographicException e) {
throw new InterlockLedgerCryptographicException("Failed to verify data with current parameters and signature", e);
}
}
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);
}
}
public IdentifiedSignature(TagSignature signature, BaseKeyId id, TagPubKey publicKey) : this()
{
Signature = signature.Required();
SignerId = id.Required();
PublicKey = publicKey.Required();
}