#include "pch.h"

// ӺCALL1ƫ
#define AddFriendByWxidCall1Offset 0x78784540 - 0x786A0000
// ӺCALL2ƫ
#define AddFriendByWxidCall2Offset 0x78E11890 - 0x786A0000
// ӺCALL3ƫ
#define AddFriendByWxidCall3Offset 0x78E11980 - 0x786A0000
// ӺCALL4ƫ
#define AddFriendByWxidCall4Offset 0x78B03970 - 0x786A0000
// ӺѲƫ
#define AddFriendByWxidParamOffset 0x7AA068F4 - 0x786A0000

struct AddFriendByWxidParamStruct
{
    DWORD fill0 = 0x0;
    DWORD fill1 = 0x0;
    DWORD fill2 = -0x1;
    DWORD fill3 = 0x0;
    DWORD fill4 = 0x0;
    DWORD fill5 = 0xF;
    char nullbuffer[0xC] = {0};
};

#ifndef USE_SOCKET
struct AddFriendByWxidStruct
{
    wchar_t *wxid;
    wchar_t *message;
};
#endif

#ifndef USE_SOCKET
BOOL AddFriendByWxidRemote(LPVOID lpParameter)
{
    AddFriendByWxidStruct *afbws = (AddFriendByWxidStruct *)lpParameter;
    BOOL isSuccess = AddFriendByWxid(afbws->wxid, afbws->message);
    return isSuccess;
}
#endif

BOOL __stdcall AddFriendByWxid(wchar_t *wxid, wchar_t *message)
{
    DWORD WeChatWinBase = GetWeChatWinBase();
    DWORD AddFriendByWxidCall1 = WeChatWinBase + AddFriendByWxidCall1Offset;
    DWORD AddFriendByWxidCall2 = WeChatWinBase + AddFriendByWxidCall2Offset;
    DWORD AddFriendByWxidCall3 = WeChatWinBase + AddFriendByWxidCall3Offset;
    DWORD AddFriendByWxidCall4 = WeChatWinBase + AddFriendByWxidCall4Offset;
    DWORD AddFriendByWxidParamAddr = WeChatWinBase + AddFriendByWxidParamOffset;

    WxString pwxid(wxid);
    AddFriendByWxidParamStruct AddFriendParam;

    char *swxid = new char[wcslen(wxid) + 1];
    ZeroMemory(swxid, wcslen(wxid) + 1);
    WideCharToMultiByte(CP_ACP, 0, wxid, -1, swxid, wcslen(wxid), NULL, NULL);
    pwxid.fill1 = (DWORD)swxid;
    pwxid.fill2 = wcslen(wxid);
    wchar_t *pmessage = message ? message : (wchar_t *)L"";
    BOOL isSuccess = 0x0;

    __asm {
		pushad;
		pushfd;
		mov edi, 0x6;
		mov esi, 0x0;
		sub esp, 0x18;
		mov eax, esp;
		mov dword ptr[eax], 0x0;
		mov dword ptr[eax + 0x14], 0xF;
		mov dword ptr[eax + 0x10], 0x0;
		sub esp, 0x18;
		lea eax, AddFriendParam;
		mov ecx, esp;
		push eax;
		call AddFriendByWxidCall1;
		push esi;
		push edi;
		mov edi, pmessage;
		sub esp, 0x14;
		mov ecx, esp;
		push - 0x1;
		mov eax, edi;
		push eax;
		call AddFriendByWxidCall2;
		push 0x2;
		lea eax, pwxid;
		sub esp, 0x14;
		mov ecx, esp;
		push eax;
		call AddFriendByWxidCall3;
		mov eax, [AddFriendByWxidParamAddr];
		mov eax, [eax];
		mov ecx, eax;
		call AddFriendByWxidCall4;
		mov isSuccess, eax;
		popfd;
		popad;
    }
    return isSuccess;
}