1 files changed, 93 insertions, 0 deletions

diff --git a/src/Authenticator.h b/src/Authenticator.h
new file mode 100644
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--- /dev/null
+++ b/src/Authenticator.h
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+
+// cAuthenticator.h
+
+// Interfaces to the cAuthenticator class representing the thread that authenticates users against the official MC server
+// Authentication prevents "hackers" from joining with an arbitrary username (possibly impersonating the server admins)
+// For more info, see http://wiki.vg/Session#Server_operation
+// In MCS, authentication is implemented as a single thread that receives queued auth requests and dispatches them one by one.
+
+
+
+
+
+#pragma once
+#ifndef CAUTHENTICATOR_H_INCLUDED
+#define CAUTHENTICATOR_H_INCLUDED
+
+#include "OSSupport/IsThread.h"
+
+
+
+
+
+// fwd: "cRoot.h"
+class cRoot;
+
+
+
+
+
+class cAuthenticator :
+	public cIsThread
+{
+	typedef cIsThread super;
+	
+public:
+	cAuthenticator(void);
+	~cAuthenticator();
+
+	/// (Re-)read server and address from INI:
+	void ReadINI(cIniFile & IniFile);
+
+	/// Queues a request for authenticating a user. If the auth fails, the user is kicked
+	void Authenticate(int a_ClientID, const AString & a_UserName, const AString & a_ServerHash);
+
+	/// Starts the authenticator thread. The thread may be started and stopped repeatedly
+	void Start(cIniFile & IniFile);
+	
+	/// Stops the authenticator thread. The thread may be started and stopped repeatedly
+	void Stop(void);
+	
+private:
+
+	class cUser
+	{
+	public:
+		int     m_ClientID;
+		AString m_Name;
+		AString m_ServerID;
+		
+		cUser(int a_ClientID, const AString & a_Name, const AString & a_ServerID) :
+			m_ClientID(a_ClientID),
+			m_Name(a_Name),
+			m_ServerID(a_ServerID)
+		{
+		}
+	} ;
+	
+	typedef std::deque<cUser> cUserList;
+	
+	cCriticalSection m_CS;
+	cUserList        m_Queue;
+	cEvent           m_QueueNonempty;
+	
+	AString m_Server;
+	AString m_Address;
+	bool    m_ShouldAuthenticate;
+	
+	// cIsThread override:
+	virtual void Execute(void) override;
+	
+	// Returns true if the user authenticated okay, false on error; iLevel is the recursion deptht (bails out if too deep)
+	bool AuthFromAddress(const AString & a_Server, const AString & a_Address, const AString & a_UserName, int a_Level = 1);
+};
+
+
+
+
+
+#endif  // CAUTHENTICATOR_H_INCLUDED
+
+
+
+