public void SslStream_SendCertificateTrust_ThrowsOnUnsupportedPlatform()
{
(X509Certificate2 certificate, X509Certificate2Collection caCerts) = TestHelper.GenerateCertificates(nameof(SslStream_SendCertificateTrust_CertificateCollection));
using X509Store store = new X509Store("Root", StoreLocation.LocalMachine);
Assert.Throws <PlatformNotSupportedException>(() => SslCertificateTrust.CreateForX509Collection(caCerts, sendTrustInHandshake: true));
Assert.Throws <PlatformNotSupportedException>(() => SslCertificateTrust.CreateForX509Store(store, sendTrustInHandshake: true));
}
public async Task SslStream_SendCertificateTrust_CertificateCollection()
{
(X509Certificate2 certificate, X509Certificate2Collection caCerts) = TestHelper.GenerateCertificates(nameof(SslStream_SendCertificateTrust_CertificateCollection));
SslCertificateTrust trust = SslCertificateTrust.CreateForX509Collection(caCerts, sendTrustInHandshake: true);
string[] acceptableIssuers = await ConnectAndGatherAcceptableIssuers(trust);
Assert.Equal(caCerts.Count, acceptableIssuers.Length);
Assert.Equal(caCerts.Select(c => c.Subject), acceptableIssuers);
}
public async Task SslStream_SendCertificateTrust_CertificateStore()
{
using X509Store store = new X509Store("Root", StoreLocation.LocalMachine);
SslCertificateTrust trust = SslCertificateTrust.CreateForX509Store(store, sendTrustInHandshake: true);
string[] acceptableIssuers = await ConnectAndGatherAcceptableIssuers(trust);
// don't assert individual ellements, just that some issuers were sent
// we use Root cert store which should always contain at least some certs
Assert.NotEmpty(acceptableIssuers);
}
private async Task <string[]> ConnectAndGatherAcceptableIssuers(SslCertificateTrust trust)
{
(SslStream client, SslStream server) = TestHelper.GetConnectedSslStreams();
using (client)
using (server)
using (X509Certificate2 serverCertificate = Configuration.Certificates.GetServerCertificate())
using (X509Certificate2 clientCertificate = Configuration.Certificates.GetClientCertificate())
{
SslServerAuthenticationOptions serverOptions = new SslServerAuthenticationOptions
{
ServerCertificate = serverCertificate,
ClientCertificateRequired = true,
RemoteCertificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) => true,
ServerCertificateContext = SslStreamCertificateContext.Create(serverCertificate, null, false, trust)
};
string[] acceptableIssuers = Array.Empty <string>();
SslClientAuthenticationOptions clientOptions = new SslClientAuthenticationOptions
{
TargetHost = "localhost",
// Force Tls 1.2 to avoid issues with certain OpenSSL versions and Tls 1.3
// https://github.com/openssl/openssl/issues/7384
EnabledSslProtocols = SslProtocols.Tls12,
RemoteCertificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) => true,
LocalCertificateSelectionCallback = (sender, targetHost, localCertificates, remoteCertificate, issuers) =>
{
if (remoteCertificate == null)
{
// ignore the first call that is called before handshake
return(null);
}
acceptableIssuers = issuers;
return(clientCertificate);
},
};
await TestConfiguration.WhenAllOrAnyFailedWithTimeout(
client.AuthenticateAsClientAsync(clientOptions),
server.AuthenticateAsServerAsync(serverOptions));
return(acceptableIssuers);
}
}
// This essentially wraps SSL* SSL_new()
internal static SafeSslHandle AllocateSslHandle(SslAuthenticationOptions sslAuthenticationOptions)
{
SafeSslHandle? sslHandle = null;
SafeSslContextHandle?sslCtxHandle = null;
SafeSslContextHandle?newCtxHandle = null;
SslProtocols protocols = CalculateEffectiveProtocols(sslAuthenticationOptions);
bool hasAlpn = sslAuthenticationOptions.ApplicationProtocols != null && sslAuthenticationOptions.ApplicationProtocols.Count != 0;
bool cacheSslContext = !DisableTlsResume && sslAuthenticationOptions.EncryptionPolicy == EncryptionPolicy.RequireEncryption && sslAuthenticationOptions.CipherSuitesPolicy == null;
if (cacheSslContext)
{
if (sslAuthenticationOptions.IsClient)
{
// We don't support client resume on old OpenSSL versions.
// We don't want to try on empty TargetName since that is our key.
// And we don't want to mess up with client authentication. It may be possible
// but it seems safe to get full new session.
if (!Interop.Ssl.Capabilities.Tls13Supported ||
string.IsNullOrEmpty(sslAuthenticationOptions.TargetHost) ||
sslAuthenticationOptions.CertificateContext != null ||
sslAuthenticationOptions.CertSelectionDelegate != null)
{
cacheSslContext = false;
}
}
else
{
// Server should always have certificate
Debug.Assert(sslAuthenticationOptions.CertificateContext != null);
if (sslAuthenticationOptions.CertificateContext == null ||
sslAuthenticationOptions.CertificateContext.SslContexts == null)
{
cacheSslContext = false;
}
}
}
if (cacheSslContext)
{
if (sslAuthenticationOptions.IsServer)
{
sslAuthenticationOptions.CertificateContext !.SslContexts !.TryGetValue(protocols | (hasAlpn ? FakeAlpnSslProtocol : SslProtocols.None), out sslCtxHandle);
}
else
{
s_clientSslContexts.TryGetValue(protocols, out sslCtxHandle);
}
}
if (sslCtxHandle == null)
{
// We did not get SslContext from cache
sslCtxHandle = newCtxHandle = AllocateSslContext(sslAuthenticationOptions, protocols, cacheSslContext);
if (cacheSslContext)
{
bool added = sslAuthenticationOptions.IsServer ?
sslAuthenticationOptions.CertificateContext !.SslContexts !.TryAdd(protocols | (SslProtocols)(hasAlpn ? 1 : 0), newCtxHandle) :
s_clientSslContexts.TryAdd(protocols, newCtxHandle);
if (added)
{
newCtxHandle = null;
}
}
}
GCHandle alpnHandle = default;
try
{
sslHandle = SafeSslHandle.Create(sslCtxHandle, sslAuthenticationOptions.IsServer);
Debug.Assert(sslHandle != null, "Expected non-null return value from SafeSslHandle.Create");
if (sslHandle.IsInvalid)
{
sslHandle.Dispose();
throw CreateSslException(SR.net_allocate_ssl_context_failed);
}
if (sslAuthenticationOptions.ApplicationProtocols != null && sslAuthenticationOptions.ApplicationProtocols.Count != 0)
{
if (sslAuthenticationOptions.IsServer)
{
Debug.Assert(Interop.Ssl.SslGetData(sslHandle) == IntPtr.Zero);
alpnHandle = GCHandle.Alloc(sslAuthenticationOptions.ApplicationProtocols);
Interop.Ssl.SslSetData(sslHandle, GCHandle.ToIntPtr(alpnHandle));
sslHandle.AlpnHandle = alpnHandle;
}
else
{
if (Interop.Ssl.SslSetAlpnProtos(sslHandle, sslAuthenticationOptions.ApplicationProtocols) != 0)
{
throw CreateSslException(SR.net_alpn_config_failed);
}
}
}
if (sslAuthenticationOptions.IsClient)
{
// The IdnMapping converts unicode input into the IDNA punycode sequence.
string punyCode = string.IsNullOrEmpty(sslAuthenticationOptions.TargetHost) ? string.Empty : s_idnMapping.GetAscii(sslAuthenticationOptions.TargetHost !);
// Similar to windows behavior, set SNI on openssl by default for client context, ignore errors.
if (!Ssl.SslSetTlsExtHostName(sslHandle, punyCode))
{
Crypto.ErrClearError();
}
if (cacheSslContext && !string.IsNullOrEmpty(punyCode))
{
sslCtxHandle.TrySetSession(sslHandle, punyCode);
bool ignored = false;
sslCtxHandle.DangerousAddRef(ref ignored);
sslHandle.SslContextHandle = sslCtxHandle;
}
// relevant to TLS 1.3 only: if user supplied a client cert or cert callback,
// advertise that we are willing to send the certificate post-handshake.
if (sslAuthenticationOptions.ClientCertificates?.Count > 0 ||
sslAuthenticationOptions.CertSelectionDelegate != null)
{
Ssl.SslSetPostHandshakeAuth(sslHandle, 1);
}
// Set client cert callback, this will interrupt the handshake with SecurityStatusPalErrorCode.CredentialsNeeded
// if server actually requests a certificate.
Ssl.SslSetClientCertCallback(sslHandle, 1);
}
else // sslAuthenticationOptions.IsServer
{
if (sslAuthenticationOptions.RemoteCertRequired)
{
Ssl.SslSetVerifyPeer(sslHandle);
}
if (sslAuthenticationOptions.CertificateContext != null)
{
if (sslAuthenticationOptions.CertificateContext.Trust?._sendTrustInHandshake == true)
{
SslCertificateTrust trust = sslAuthenticationOptions.CertificateContext !.Trust !;
X509Certificate2Collection certList = (trust._trustList ?? trust._store !.Certificates);
Debug.Assert(certList != null, "certList != null");
Span <IntPtr> handles = certList.Count <= 256 ?
stackalloc IntPtr[256] :
new IntPtr[certList.Count];
for (int i = 0; i < certList.Count; i++)
{
handles[i] = certList[i].Handle;
}
if (!Ssl.SslAddClientCAs(sslHandle, handles.Slice(0, certList.Count)))
{
// The method can fail only when the number of cert names exceeds the maximum capacity
// supported by STACK_OF(X509_NAME) structure, which should not happen under normal
// operation.
Debug.Fail("Failed to add issuer to trusted CA list.");
}
}
byte[]? ocspResponse = sslAuthenticationOptions.CertificateContext.GetOcspResponseNoWaiting();
if (ocspResponse != null)
{
Ssl.SslStapleOcsp(sslHandle, ocspResponse);
}
}
}
}
catch
{
if (alpnHandle.IsAllocated)
{
alpnHandle.Free();
}
throw;
}
finally
{
newCtxHandle?.Dispose();
}
return(sslHandle);
}
public SafeDeleteSslContext(SafeFreeSslCredentials credential, SslAuthenticationOptions sslAuthenticationOptions)
: base(credential)
{
Debug.Assert((null != credential) && !credential.IsInvalid, "Invalid credential used in SafeDeleteSslContext");
try
{
int osStatus;
_sslContext = CreateSslContext(credential, sslAuthenticationOptions.IsServer);
// Make sure the class instance is associated to the session and is provided
// in the Read/Write callback connection parameter
SslSetConnection(_sslContext);
unsafe
{
osStatus = Interop.AppleCrypto.SslSetIoCallbacks(
_sslContext,
&ReadFromConnection,
&WriteToConnection);
}
if (osStatus != 0)
{
throw Interop.AppleCrypto.CreateExceptionForOSStatus(osStatus);
}
if (sslAuthenticationOptions.CipherSuitesPolicy != null)
{
uint[] tlsCipherSuites = sslAuthenticationOptions.CipherSuitesPolicy.Pal.TlsCipherSuites;
unsafe
{
fixed(uint *cipherSuites = tlsCipherSuites)
{
osStatus = Interop.AppleCrypto.SslSetEnabledCipherSuites(
_sslContext,
cipherSuites,
tlsCipherSuites.Length);
if (osStatus != 0)
{
throw Interop.AppleCrypto.CreateExceptionForOSStatus(osStatus);
}
}
}
}
if (sslAuthenticationOptions.ApplicationProtocols != null && sslAuthenticationOptions.ApplicationProtocols.Count != 0)
{
// On OSX coretls supports only client side. For server, we will silently ignore the option.
if (!sslAuthenticationOptions.IsServer)
{
Interop.AppleCrypto.SslCtxSetAlpnProtos(_sslContext, sslAuthenticationOptions.ApplicationProtocols);
}
}
}
catch (Exception ex)
{
Debug.Write("Exception Caught. - " + ex);
Dispose();
throw;
}
if (!string.IsNullOrEmpty(sslAuthenticationOptions.TargetHost) && !sslAuthenticationOptions.IsServer)
{
Interop.AppleCrypto.SslSetTargetName(_sslContext, sslAuthenticationOptions.TargetHost);
}
if (sslAuthenticationOptions.CertificateContext == null && sslAuthenticationOptions.CertSelectionDelegate != null)
{
// certificate was not provided but there is user callback. We can break handshake if server asks for certificate
// and we can try to get it based on remote certificate and trusted issuers.
Interop.AppleCrypto.SslBreakOnCertRequested(_sslContext, true);
}
if (sslAuthenticationOptions.IsServer)
{
if (sslAuthenticationOptions.RemoteCertRequired)
{
Interop.AppleCrypto.SslSetAcceptClientCert(_sslContext);
}
if (sslAuthenticationOptions.CertificateContext?.Trust?._sendTrustInHandshake == true)
{
SslCertificateTrust trust = sslAuthenticationOptions.CertificateContext !.Trust !;
X509Certificate2Collection certList = (trust._trustList ?? trust._store !.Certificates);
Debug.Assert(certList != null, "certList != null");
Span <IntPtr> handles = certList.Count <= 256
? stackalloc IntPtr[256]
: new IntPtr[certList.Count];
for (int i = 0; i < certList.Count; i++)
{
handles[i] = certList[i].Handle;
}
Interop.AppleCrypto.SslSetCertificateAuthorities(_sslContext, handles.Slice(0, certList.Count), true);
}
}
}
public void SslStream_SendCertificateTrust_CertificateCollection_ThrowsOnWindows()
{
(X509Certificate2 certificate, X509Certificate2Collection caCerts) = TestHelper.GenerateCertificates(nameof(SslStream_SendCertificateTrust_CertificateCollection));
Assert.Throws <PlatformNotSupportedException>(() => SslCertificateTrust.CreateForX509Collection(caCerts, sendTrustInHandshake: true));
}
