internal void ConsumeParameters(TextBuffer inParameters, TextBuffer outParameters) { PropertyInfo[] properties = GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic); foreach (var propInfo in properties) { ProtocolKeyAttribute attr = (ProtocolKeyAttribute)Attribute.GetCustomAttribute(propInfo, typeof(ProtocolKeyAttribute)); if (attr != null) { if (inParameters[attr.Name] != null) { object value = ProtocolKeyAttribute.GetValueAsObject(inParameters[attr.Name], propInfo.PropertyType); propInfo.GetSetMethod(true).Invoke(this, new object[] { value }); inParameters.Remove(attr.Name); if (attr.Type == KeyType.Negotiated && !_negotiatedParameters.ContainsKey(attr.Name)) { value = propInfo.GetGetMethod(true).Invoke(this, null); outParameters.Add(attr.Name, ProtocolKeyAttribute.GetValueAsString(value, propInfo.PropertyType)); _negotiatedParameters.Add(attr.Name, string.Empty); } } } } }
private void NegotiateSecurity() { _loginStage = LoginStages.SecurityNegotiation; // // Establish the contents of the request // TextBuffer parameters = new TextBuffer(); GetParametersToNegotiate(parameters, KeyUsagePhase.SecurityNegotiation, _session.SessionType); _session.GetParametersToNegotiate(parameters, KeyUsagePhase.SecurityNegotiation); string authParam = _authenticators[0].Identifier; for (int i = 1; i < _authenticators.Length; ++i) { authParam += "," + _authenticators[i].Identifier; } parameters.Add(AuthMethodParameter, authParam); // // Send the request... // byte[] paramBuffer = new byte[parameters.Size]; parameters.WriteTo(paramBuffer, 0); LoginRequest req = new LoginRequest(this); byte[] packet = req.GetBytes(paramBuffer, 0, paramBuffer.Length, true); _stream.Write(packet, 0, packet.Length); _stream.Flush(); // // Read the response... // TextBuffer settings = new TextBuffer(); ProtocolDataUnit pdu = ReadPdu(); LoginResponse resp = ParseResponse <LoginResponse>(pdu); if (resp.StatusCode != LoginStatusCode.Success) { throw new LoginException("iSCSI Target indicated login failure: " + resp.StatusCode); } if (resp.Continue) { MemoryStream ms = new MemoryStream(); ms.Write(resp.TextData, 0, resp.TextData.Length); while (resp.Continue) { pdu = ReadPdu(); resp = ParseResponse <LoginResponse>(pdu); ms.Write(resp.TextData, 0, resp.TextData.Length); } settings.ReadFrom(ms.GetBuffer(), 0, (int)ms.Length); } else if (resp.TextData != null) { settings.ReadFrom(resp.TextData, 0, resp.TextData.Length); } Authenticator authenticator = null; for (int i = 0; i < _authenticators.Length; ++i) { if (settings[AuthMethodParameter] == _authenticators[i].Identifier) { authenticator = _authenticators[i]; break; } } settings.Remove(AuthMethodParameter); settings.Remove("TargetPortalGroupTag"); if (authenticator == null) { throw new LoginException("iSCSI Target specified an unsupported authentication method: " + settings[AuthMethodParameter]); } parameters = new TextBuffer(); ConsumeParameters(settings, parameters); while (!resp.Transit) { // // Send the request... // parameters = new TextBuffer(); authenticator.GetParameters(parameters); paramBuffer = new byte[parameters.Size]; parameters.WriteTo(paramBuffer, 0); req = new LoginRequest(this); packet = req.GetBytes(paramBuffer, 0, paramBuffer.Length, true); _stream.Write(packet, 0, packet.Length); _stream.Flush(); // // Read the response... // settings = new TextBuffer(); pdu = ReadPdu(); resp = ParseResponse <LoginResponse>(pdu); if (resp.StatusCode != LoginStatusCode.Success) { throw new LoginException("iSCSI Target indicated login failure: " + resp.StatusCode); } if (resp.TextData != null && resp.TextData.Length != 0) { if (resp.Continue) { MemoryStream ms = new MemoryStream(); ms.Write(resp.TextData, 0, resp.TextData.Length); while (resp.Continue) { pdu = ReadPdu(); resp = ParseResponse <LoginResponse>(pdu); ms.Write(resp.TextData, 0, resp.TextData.Length); } settings.ReadFrom(ms.GetBuffer(), 0, (int)ms.Length); } else { settings.ReadFrom(resp.TextData, 0, resp.TextData.Length); } authenticator.SetParameters(settings); } } if (resp.NextStage != NextLoginStage) { throw new LoginException("iSCSI Target wants to transition to a different login stage: " + resp.NextStage + " (expected: " + NextLoginStage + ")"); } _loginStage = resp.NextStage; }