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105 lines
2.8 KiB
C++
105 lines
2.8 KiB
C++
/* EQEMu: Everquest Server Emulator
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Copyright (C) 2001-2010 EQEMu Development Team (http://eqemulator.net)
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY except by those people which sell it, which
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are required to give you total support for your newly bought product;
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without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef EQEMU_ENCRYPTION_H
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#define EQEMU_ENCRYPTION_H
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#ifdef WIN32
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#include <windows.h>
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#include <string>
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typedef char*(*DLLFUNC_DecryptUsernamePassword)(const char*, unsigned int, int);
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typedef char*(*DLLFUNC_Encrypt)(const char*, unsigned int, unsigned int&);
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typedef void(*DLLFUNC_HeapDelete)(char*);
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/**
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* Basic windows encryption plugin.
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* Handles the managment of the plugin.
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*/
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class Encryption
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{
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public:
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/**
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* Constructor, sets all member pointers to nullptr.
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*/
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Encryption() : h_dll(nullptr), encrypt_func(nullptr), decrypt_func(nullptr), delete_func(nullptr) { };
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/**
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* Destructor, if it's loaded it unloads this library.
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*/
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~Encryption() { if(Loaded()) { Unload(); } }
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/**
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* Returns true if the dll is loaded, otherwise false.
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*/
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inline bool Loaded() { return (h_dll != nullptr); }
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/**
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* Loads the plugin.
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* True if there are no errors, false if there was an error.
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*/
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bool LoadCrypto(std::string name);
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/**
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* Wrapper around the plugin's decrypt function.
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*/
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char* DecryptUsernamePassword(const char* encryptedBuffer, unsigned int bufferSize, int mode);
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/**
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* Wrapper around the plugin's encrypt function.
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*/
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char* Encrypt(const char* buffer, unsigned int bufferSize, unsigned int &outSize);
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/**
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* Wrapper around the plugin's delete function.
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*/
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void DeleteHeap(char* buffer);
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private:
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/**
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* Loads the named dll into memory.
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* Returns true if there were no errors, otherwise return false.
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*/
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bool Load(const char *name);
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/**
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* Frees the dll from memory if it's loaded.
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*/
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void Unload();
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/**
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* Similar in function to *sym = GetProcAddress(h_dll, name).
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* Returns true if there were no errors, false otherwise.
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*/
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bool GetSym(const char *name, void **sym);
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/**
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* Similar in function to return GetProcAddress(h_dll, name).
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* Returns a pointer to the function if it is found, null on an error.
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*/
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void *GetSym(const char *name);
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HINSTANCE h_dll;
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DLLFUNC_Encrypt encrypt_func;
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DLLFUNC_DecryptUsernamePassword decrypt_func;
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DLLFUNC_HeapDelete delete_func;
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};
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#endif
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#endif
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