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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Net.Sockets;
using System.Net.Test.Common;
using System.Security.Cryptography.X509Certificates;
using System.Threading.Tasks;
using Xunit;
namespace System.Net.Security.Tests
{
using Configuration = System.Net.Test.Common.Configuration;
public class CertificateValidationClientServer : IDisposable
{
private readonly X509Certificate2 _clientCertificate;
private readonly X509Certificate2Collection _clientCertificateCollection;
private readonly X509Certificate2 _serverCertificate;
private readonly X509Certificate2Collection _serverCertificateCollection;
private bool _clientCertificateRemovedByFilter;
public CertificateValidationClientServer()
{
_serverCertificateCollection = Configuration.Certificates.GetServerCertificateCollection();
_serverCertificate = Configuration.Certificates.GetServerCertificate();
_clientCertificateCollection = Configuration.Certificates.GetClientCertificateCollection();
_clientCertificate = Configuration.Certificates.GetClientCertificate();
}
public void Dispose()
{
_serverCertificate.Dispose();
_clientCertificate.Dispose();
foreach (X509Certificate2 cert in _serverCertificateCollection) cert.Dispose();
foreach (X509Certificate2 cert in _clientCertificateCollection) cert.Dispose();
}
[Theory]
[InlineData(false)]
[InlineData(true)]
public async Task CertificateValidationClientServer_EndToEnd_Ok(bool useClientSelectionCallback)
{
IPEndPoint endPoint = new IPEndPoint(IPAddress.IPv6Loopback, 0);
var server = new TcpListener(endPoint);
server.Start();
_clientCertificateRemovedByFilter = false;
if (PlatformDetection.IsWindows7 &&
!useClientSelectionCallback &&
!Capability.IsTrustedRootCertificateInstalled())
{
// https://technet.microsoft.com/en-us/library/hh831771.aspx#BKMK_Changes2012R2
// Starting with Windows 8, the "Management of trusted issuers for client authentication" has changed:
// The behavior to send the Trusted Issuers List by default is off.
//
// In Windows 7 the Trusted Issuers List is sent within the Server Hello TLS record. This list is built
// by the server using certificates from the Trusted Root Authorities certificate store.
// The client side will use the Trusted Issuers List, if not empty, to filter proposed certificates.
_clientCertificateRemovedByFilter = true;
}
using (var clientConnection = new TcpClient(AddressFamily.InterNetworkV6))
{
IPEndPoint serverEndPoint = (IPEndPoint)server.LocalEndpoint;
Task clientConnect = clientConnection.ConnectAsync(serverEndPoint.Address, serverEndPoint.Port);
Task<TcpClient> serverAccept = server.AcceptTcpClientAsync();
await TestConfiguration.WhenAllOrAnyFailedWithTimeout(clientConnect, serverAccept);
LocalCertificateSelectionCallback clientCertCallback = null;
if (useClientSelectionCallback)
{
clientCertCallback = ClientCertSelectionCallback;
}
using (TcpClient serverConnection = await serverAccept)
using (SslStream sslClientStream = new SslStream(
clientConnection.GetStream(),
false,
ClientSideRemoteServerCertificateValidation,
clientCertCallback))
using (SslStream sslServerStream = new SslStream(
serverConnection.GetStream(),
false,
ServerSideRemoteClientCertificateValidation))
{
string serverName = _serverCertificate.GetNameInfo(X509NameType.SimpleName, false);
var clientCerts = new X509CertificateCollection();
if (!useClientSelectionCallback)
{
clientCerts.Add(_clientCertificate);
}
Task clientAuthentication = sslClientStream.AuthenticateAsClientAsync(
serverName,
clientCerts,
SslProtocolSupport.DefaultSslProtocols,
false);
Task serverAuthentication = sslServerStream.AuthenticateAsServerAsync(
_serverCertificate,
true,
SslProtocolSupport.DefaultSslProtocols,
false);
await TestConfiguration.WhenAllOrAnyFailedWithTimeout(clientAuthentication, serverAuthentication);
if (!_clientCertificateRemovedByFilter)
{
Assert.True(sslClientStream.IsMutuallyAuthenticated, "sslClientStream.IsMutuallyAuthenticated");
Assert.True(sslServerStream.IsMutuallyAuthenticated, "sslServerStream.IsMutuallyAuthenticated");
Assert.Equal(sslServerStream.RemoteCertificate.Subject, _clientCertificate.Subject);
}
else
{
Assert.False(sslClientStream.IsMutuallyAuthenticated, "sslClientStream.IsMutuallyAuthenticated");
Assert.False(sslServerStream.IsMutuallyAuthenticated, "sslServerStream.IsMutuallyAuthenticated");
Assert.Null(sslServerStream.RemoteCertificate);
}
Assert.Equal(sslClientStream.RemoteCertificate.Subject, _serverCertificate.Subject);
}
}
}
private X509Certificate ClientCertSelectionCallback(
object sender,
string targetHost,
X509CertificateCollection localCertificates,
X509Certificate remoteCertificate,
string[] acceptableIssuers)
{
return _clientCertificate;
}
private bool ServerSideRemoteClientCertificateValidation(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
{
SslPolicyErrors expectedSslPolicyErrors = SslPolicyErrors.None;
if (!Capability.IsTrustedRootCertificateInstalled())
{
if (!_clientCertificateRemovedByFilter)
{
expectedSslPolicyErrors = SslPolicyErrors.RemoteCertificateChainErrors;
}
else
{
expectedSslPolicyErrors = SslPolicyErrors.RemoteCertificateNotAvailable;
}
}
else
{
// Validate only if we're able to build a trusted chain.
CertificateChainValidation.Validate(_clientCertificateCollection, chain);
}
Assert.Equal(expectedSslPolicyErrors, sslPolicyErrors);
if (!_clientCertificateRemovedByFilter)
{
Assert.Equal(_clientCertificate, certificate);
}
return true;
}
private bool ClientSideRemoteServerCertificateValidation(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
{
SslPolicyErrors expectedSslPolicyErrors = SslPolicyErrors.None;
if (!Capability.IsTrustedRootCertificateInstalled())
{
expectedSslPolicyErrors = SslPolicyErrors.RemoteCertificateChainErrors;
}
else
{
// Validate only if we're able to build a trusted chain.
CertificateChainValidation.Validate(_serverCertificateCollection, chain);
}
Assert.Equal(expectedSslPolicyErrors, sslPolicyErrors);
Assert.Equal(_serverCertificate, certificate);
return true;
}
}
}
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