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Hello *, I’m using the last version of C# OpenSSL from
https://github.com/openssl-net/openssl-net (This wrapper is based on version 1.0.2a of libeay32.dll and ssleay32.dll). I’m using C# OpenSSL to test my Tls Client that supports TLS starting from version 1.2 and all the cipher suites. Moreover, I’m using Microsoft windows 7. I have already installed Microsoft visual C++ 2010 express and
Microsoft visual Studio 2010. I always face an error “TLSv1.2 81 - Alert (Level: Fatal, Description: Insufficient Security)”
I have debugged the issue. The issue come from a function called SSL_CTX_new() which is connected to ssleay32.dll. the clienthello is always sent correctly and then the OpenSSL server replies
with Insufficient Security The console also shows this: .NET HSM Received: ClientHello (188 bytes) .NET Offered suite by client: TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 (0xc02b) [not supported] .NET Offered suite by client: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 (0xc023) [not supported] .NET Offered suite by client: TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256 (0xc025) [not supported] .NET Offered suite by client: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA (0xc009) [not supported] .NET Offered suite by client: TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA (0xc004) [not supported] .NET Offered suite by client: TLS_RSA_WITH_AES_128_CBC_SHA256 (0x003c) [not supported] .NET Offered suite by client: TLS_RSA_WITH_AES_128_CBC_SHA (0x002f) [not supported] .NET Offered suite by client: TLS_ECDH_ECDSA_WITH_NULL_SHA (0xc001) [not supported] .NET Offered suite by client: TLS_RSA_WITH_NULL_SHA256 (0x003b) [not supported] .NET Offered suite by client: TLS_RSA_WITH_NULL_SHA (0x0002) [not supported] .NET ALERT SENT : Fatal InsufficientSecurity .NET no shared cipher suites And in Wireshark shows this: "3406.315537","fe80::ff:fe00:2","fe80::1:5","SSL","271","Client Hello" "3419.805155","fe80::1:5","fe80::ff:fe00:2","TLSv1.2","81","Alert (Level: Fatal, Description: Insufficient Security)" So, I think the error is in something related to configuration of ssleay32.dll My code is simple and is as follows: try { TestCaseBegin();
Output.WriteLine("TLS Server Certificate preparation"); CertDir =
Path.GetFullPath("..\\Appl\\Certificates\\Certificate"); TlsServerCertificate = loadCertificateFromFile(Path.Combine(CertDir,
@"Vector_ServerCertificate_RsaSha1_IA_pfx.pfx"),
"123456"); TlsServerCaCertificates =
new X509Chain(OpenSSL.Core.BIO.File(Path.Combine(CertDir,
@"Vector_ServerCertificate_RsaSha1_Root_cert.cer"),
"r"));
Output.WriteLine("Start connection"); TS_RcTlsConnect(TlsConnectMode.Rsa);
Output.WriteLine("Send Client Hello"); TS_WaitForTcpConnection();
Output.WriteLine("make sslStreamServer"); SslStream sslStreamServer =
new SslStream(tcpClient.GetStream(),
true, MyRemoteCertificateValidationHandler,MyLocalCertificateSelectionHandler);
Output.WriteLine("Start AuthenticateAsServer");
sslStreamServer.AuthenticateAsServer(TlsServerCertificate,
false, TlsServerCaCertificates,
SslProtocols.Tls, SslStrength.All,
false); }
catch (TestStepFailException e)
{
HandleTestStepFailException(e);
Output.WriteLine(e.ToString()); }
catch (Exception ex)
{
PrintException(ex);
Output.WriteLine(ex.ToString()); }
finally {
TestCaseEnd(); } Has anyone an idea? Best Regards; Amr |
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