Created
October 24, 2023 15:29
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SslStreamCustomCA
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using System.Net.Security; | |
using System.Net.Sockets; | |
using System.Security.Cryptography; | |
using System.Security.Cryptography.X509Certificates; | |
string host = "test.mosquitto.org"; | |
int port = 8883; | |
using Socket socket = new(SocketType.Stream, ProtocolType.Tcp); | |
socket.Connect(host, port); | |
using NetworkStream stream = new(socket); | |
using SslStream sslStream = new(stream); | |
string ca = await new HttpClient().GetStringAsync("https://test.mosquitto.org/ssl/mosquitto.org.crt"); | |
SslClientAuthenticationOptions tlsOps = new() | |
{ | |
TargetHost = host | |
}; | |
tlsOps.CertificateChainPolicy = new X509ChainPolicy(); | |
tlsOps.CertificateChainPolicy.TrustMode = X509ChainTrustMode.CustomRootTrust; | |
tlsOps.CertificateChainPolicy.CustomTrustStore.ImportFromPem(ca); | |
tlsOps.CertificateChainPolicy.VerificationFlags = X509VerificationFlags.IgnoreEndRevocationUnknown; | |
sslStream.AuthenticateAsClient(tlsOps); | |
Console.WriteLine(sslStream.IsAuthenticated); | |
X509Certificate2 serverCert = new(sslStream.RemoteCertificate!); | |
Console.WriteLine($"TLS cert: \n\t {serverCert.Subject} from \n\t {serverCert.Issuer}"); | |
foreach (X509Extension extension in serverCert.Extensions) | |
{ | |
AsnEncodedData asndata = new AsnEncodedData(extension.Oid, extension.RawData); | |
Console.WriteLine("Extension type: {0}", extension.Oid.FriendlyName); | |
Console.WriteLine("Oid value: {0}", asndata.Oid.Value); | |
Console.WriteLine("Raw data length: {0} {1}", asndata.RawData.Length, Environment.NewLine); | |
Console.WriteLine(asndata.Format(true)); | |
} |
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