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");
}
}
public override bool GetParameters(TextBuffer textBuffer)
{
switch (_state)
{
case State.SendAlgorithm:
textBuffer.Add("CHAP_A", "5");
_state = State.ReceiveChallenge;
return(false);
case State.SendResponse:
textBuffer.Add("CHAP_N", _name);
textBuffer.Add("CHAP_R", CalcResponse());
_state = State.Finished;
return(true);
default:
throw new InvalidOperationException("Unknown authentication state: " + _state);
}
}
private void GetParametersToNegotiate(TextBuffer parameters, KeyUsagePhase phase, SessionType sessionType)
{
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)
{
object value = propInfo.GetGetMethod(true).Invoke(this, null);
if (attr.ShouldTransmit(value, propInfo.PropertyType, phase, sessionType == SessionType.Discovery))
{
parameters.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;
}
public TargetInfo[] EnumerateTargets()
{
TextBuffer parameters = new TextBuffer();
parameters.Add(SendTargetsParameter, "All");
byte[] paramBuffer = new byte[parameters.Size];
parameters.WriteTo(paramBuffer, 0);
TextRequest req = new TextRequest(this);
byte[] packet = req.GetBytes(0, paramBuffer, 0, paramBuffer.Length, true);
_stream.Write(packet, 0, packet.Length);
_stream.Flush();
ProtocolDataUnit pdu = ReadPdu();
TextResponse resp = ParseResponse <TextResponse>(pdu);
TextBuffer buffer = new TextBuffer();
if (resp.TextData != null)
{
buffer.ReadFrom(resp.TextData, 0, resp.TextData.Length);
}
List <TargetInfo> targets = new List <TargetInfo>();
string currentTarget = null;
List <TargetAddress> currentAddresses = null;
foreach (var line in buffer.Lines)
{
if (currentTarget == null)
{
if (line.Key != TargetNameParameter)
{
throw new InvalidProtocolException("Unexpected response parameter " + line.Key + " expected " + TargetNameParameter);
}
currentTarget = line.Value;
currentAddresses = new List <TargetAddress>();
}
else if (line.Key == TargetNameParameter)
{
targets.Add(new TargetInfo(currentTarget, currentAddresses.ToArray()));
currentTarget = line.Value;
currentAddresses.Clear();
}
else if (line.Key == TargetAddressParameter)
{
currentAddresses.Add(TargetAddress.Parse(line.Value));
}
}
if (currentTarget != null)
{
targets.Add(new TargetInfo(currentTarget, currentAddresses.ToArray()));
}
return(targets.ToArray());
}