Пример #1
0
        private 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 && (attr.Sender & KeySender.Target) != 0)
                {
                    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);
                        }
                    }
                }
            }

            _session.ConsumeParameters(inParameters, outParameters);

            foreach (var param in inParameters.Lines)
            {
                outParameters.Add(param.Key, "NotUnderstood");
            }
        }
Пример #2
0
        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;
        }