public IKeyshareInstance GetDefaultKeyShare(KeyExchangeType exchangeType)
{
switch (exchangeType)
{
case KeyExchangeType.Ecdhe:
return(KeyShareProvider.GetKeyShareInstance(_priorityOrderedEchdeExchanges[0]));
default:
Alerts.AlertException.ThrowAlert(Alerts.AlertLevel.Fatal, Alerts.AlertDescription.decode_error, $"No matching key exchange for {exchangeType}");
return(null);
}
}
/// <summary>
/// Heritage KeyExchange selection (pre tls 1.3)
/// </summary>
/// <param name="keyExchange"></param>
/// <param name="supportedGroups"></param>
/// <returns></returns>
public IKeyExchange GetKeyExchange(KeyExchangeType keyExchange, BigEndianAdvancingSpan supportedGroups)
{
switch (keyExchange)
{
case KeyExchangeType.Rsa:
return(new RsaKeyExchange());
case KeyExchangeType.Ecdhe:
return(EcdheKeyExchange(supportedGroups));
default:
Alerts.AlertException.ThrowAlert(Alerts.AlertLevel.Fatal, Alerts.AlertDescription.handshake_failure, "Unable to match key exchange");
return(null);
}
}
public abstract KeyExchange GetKeyExchange(KeyExchangeType keyExchange, ReadOnlySequence <byte> supportedGroups);
