private const int ServerReadTimeoutInSeconds = 3; // TODO: Have this configurable in case this isn't big enough.
public static async Task <IEnumerable <ProtocolVersion> > GetSupportedProtocolVersionsAsync(string hostName, int port = 443)
{
List <ProtocolVersion> supportedVersions = new List <ProtocolVersion>();
foreach (var version in Enum.GetValues(typeof(ProtocolVersion)).Cast <ProtocolVersion>())
{
Record response = await SendClientHelloAsync(TlsRequestParameters.Create(hostName, port, version, version, null));
bool supported = response.ContentType == RecordContentTypes.Handshake;
if (supported)
{
supportedVersions.Add(version);
}
}
return(supportedVersions);
}
public static async Task <IEnumerable <CipherSuites> > GetSupportedCipherSuitesAsync(string hostName, int port = 443, ProtocolVersion protocolVersion = ProtocolVersion.Tls12)
{
List <CipherSuites> supportedCipherSuites = new List <CipherSuites>();
foreach (CipherSuites suite in Enum.GetValues(typeof(CipherSuites)).Cast <CipherSuites>())
{
Record response = await SendClientHelloAsync(TlsRequestParameters.Create(hostName, port, protocolVersion, protocolVersion, new CipherSuites[] { suite }));
if (response == null)
{
throw new Exception("No response received from server. Check the host name and port number.");
}
bool supported = response.ContentType == RecordContentTypes.Handshake;
if (supported)
{
supportedCipherSuites.Add(suite);
}
}
return(supportedCipherSuites);
}