private static async Task TestProtocols(
SslTester sslTester,
string message,
IEnumerable <SslProtocols> protocols
)
{
Console.WriteLine(message);
// wait for all to be done.
await Task.WhenAll(protocols.Select(protocol => WriteResponseAsync(protocol, sslTester)).ToArray()).ConfigureAwait(false);
// add a new line
Console.WriteLine();
}
private static async Task Main(string[] args)
{
var arguments = new CommandlineParser(args, new CommandlineArgumentRules
{
new HelpCommandlineArgumentRule(new [] { "help", "h" }),
new RequiredCommandlineArgumentRule("host"),
new OptionalCommandlineArgumentRule("port", "443"),
new OptionalCommandlineArgumentRule("scheme", "http")
});
var uriBuilder = new UriBuilder(arguments.Get <string>("scheme"),
arguments.Get <string>("host"),
arguments.Get <int>("port"));
var uri = uriBuilder.Uri;
var sslTest = new SslTester(uriBuilder.Uri);
Console.WriteLine($"Checking: {uri} (IP resolved as {await sslTest.GetIpAddressAsync().ConfigureAwait(false) ?? IPAddress.None})");
// test the prefered/expected protocols
await TestProtocols(
sslTest,
"Prefered:",
new[] {
SslProtocols.None,
SslProtocols.Tls12,
SslProtocols.Tls13
}
).ConfigureAwait(false);
// then test the obsolete protocols
await TestProtocols(
sslTest,
"Obsolete:",
new[] {
// we know it is obsolete, this is why we are testing for it
#pragma warning disable 618
SslProtocols.Ssl2,
SslProtocols.Ssl3,
#pragma warning restore 618
SslProtocols.Tls,
SslProtocols.Tls11
}
).ConfigureAwait(false);
}
private static async Task WriteResponseAsync(SslProtocols ssl, SslTester sslTester)
{
var supported = await sslTester.IsSupportedAsync(ssl).ConfigureAwait(false);
lock (Lock)
{
var color = Console.ForegroundColor;
try
{
const string warning = "[Warning]";
const string good = "[Good] ";
const string bad = "[Bad] ";
ConsoleColor newColor;
string message;
switch (ssl)
{
case SslProtocols.None:
newColor = ConsoleColor.Blue;
// the default is kind of pexpected
message = supported ? good : warning;
break;
// we know it is obsolete, this is why we are testing for it
#pragma warning disable 618
case SslProtocols.Ssl2:
case SslProtocols.Ssl3:
#pragma warning restore 618
case SslProtocols.Tls:
case SslProtocols.Tls11:
newColor = supported? ConsoleColor.Yellow: ConsoleColor.Green;
message = supported ? warning : good;
break;
case SslProtocols.Tls12:
case SslProtocols.Tls13:
newColor = supported ? ConsoleColor.Green : ConsoleColor.Red;
message = supported ? good : warning;
break;
default:
newColor = ConsoleColor.Gray;
message = bad;
break;
}
Console.ForegroundColor = newColor;
if (supported)
{
Console.WriteLine($" {message}: {ssl} is supported");
}
else
{
Console.WriteLine($" {message}: {ssl} is not supported");
}
}
finally
{
Console.ForegroundColor = color;
}
}
}