// Dispose(bool disposing) executes in two distinct scenarios.
// If disposing equals true, the method has been called directly
// or indirectly by a user's code. Managed and unmanaged resources
// can be disposed.
// If disposing equals false, the method has been called by the
// runtime from inside the finalizer and you should not reference
// other objects. Only unmanaged resources can be disposed.
private void Dispose(bool disposing)
{
// Check to see if Dispose has already been called.
if (!this.disposed)
{
// If disposing equals true, dispose all managed
// and unmanaged resources.
if (disposing)
{
// Dispose managed resources.
// Remove the event handler or we will be in trouble with too many events
this.m_XmppClient.StreamParser.OnStreamElement -= new StreamHandler(this.OnStreamElement);
this.m_XmppClient = null;
this.m_Mechanism = null;
}
// Call the appropriate methods to clean up
// unmanaged resources here.
// If disposing is false,
// only the following code is executed.
}
this.disposed = true;
}
internal void OnStreamElement(object sender, Node e)
{
if (this.m_XmppClient.XmppConnectionState == XmppConnectionState.Securing ||
this.m_XmppClient.XmppConnectionState == XmppConnectionState.StartCompression)
{
return;
}
if (e.GetType() == typeof(StreamFeatures))
{
var f = e as StreamFeatures;
if (!this.m_XmppClient.Authenticated)
{
// RECV: <stream:features><mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>
// <mechanism>DIGEST-MD5</mechanism><mechanism>PLAIN</mechanism>
// </mechanisms>
// <register xmlns='http://jabber.org/features/iq-register'/>
// </stream:features>
// SENT: <auth mechanism="DIGEST-MD5" xmlns="urn:ietf:params:xml:ns:xmpp-sasl"/>
// Select a SASL mechanism
var args = new SaslEventArgs(f.Mechanisms);
OnSaslStart?.Invoke(this, args);
if (args.Auto == true)
{
// Library handles the Sasl stuff
if (f.Mechanisms != null)
{
if (this.m_XmppClient.UseStartTLS == false && this.m_XmppClient.UseSSL == false &&
f.Mechanisms.SupportsMechanism(MechanismType.X_GOOGLE_TOKEN))
{
// This is the only way to connect to GTalk on a unsecure Socket for now
// Secure authentication is done over https requests to pass the
// authentication credentials on a secure connection
args.Mechanism = Protocol.sasl.Mechanism.GetMechanismName(MechanismType.X_GOOGLE_TOKEN);
}
else if (f.Mechanisms.SupportsMechanism(MechanismType.DIGEST_MD5))
{
args.Mechanism = Protocol.sasl.Mechanism.GetMechanismName(MechanismType.DIGEST_MD5);
}
else if (f.Mechanisms.SupportsMechanism(MechanismType.PLAIN))
{
args.Mechanism = Protocol.sasl.Mechanism.GetMechanismName(MechanismType.PLAIN);
}
else
{
args.Mechanism = null;
}
}
else
{
// Hack for Google
// TODO: i don't think we need this anymore. This was in an very early version of the gtalk server.
args.Mechanism = null;
//args.Mechanism = agsXMPP.protocol.sasl.Mechanism.GetMechanismName(agsXMPP.protocol.sasl.MechanismType.PLAIN);
}
}
if (args.Mechanism != null)
{
this.m_Mechanism = Factory.SaslFactory.GetMechanism(args.Mechanism);
// Set properties for the SASL mechanism
this.m_Mechanism.Username = this.m_XmppClient.Username;
this.m_Mechanism.Password = this.m_XmppClient.Password;
this.m_Mechanism.Server = this.m_XmppClient.Server;
// Call Init Method on the mechanism
this.m_Mechanism.Init(this.m_XmppClient);
}
else
{
this.m_XmppClient.RequestLoginInfo();
}
}
else if (!this.m_XmppClient.Binded)
{
if (f.SupportsBind)
{
this.m_XmppClient.DoChangeXmppConnectionState(XmppConnectionState.Binding);
BindIq bIq;
if (this.m_XmppClient.Resource == null || this.m_XmppClient.Resource.Length == 0)
{
bIq = new BindIq(IQType.Set, new Jid(this.m_XmppClient.Server));
}
else
{
bIq = new BindIq(IQType.Set, new Jid(this.m_XmppClient.Server), this.m_XmppClient.Resource);
}
this.m_XmppClient.IqGrabber.SendIq(bIq, new IqCB(this.BindResult), null);
}
}
}
else if (e.GetType() == typeof(Challenge))
{
if (this.m_Mechanism != null && !this.m_XmppClient.Authenticated)
{
this.m_Mechanism.Parse(e);
}
}
else if (e.GetType() == typeof(Success))
{
// SASL authentication was successfull
OnSaslEnd?.Invoke(this);
this.m_XmppClient.DoChangeXmppConnectionState(XmppConnectionState.Authenticated);
this.m_Mechanism = null;
this.m_XmppClient.Reset();
}
else if (e.GetType() == typeof(Failure))
{
// Authentication failure
this.m_XmppClient.FireOnAuthError(e as Element);
}
}