工具函数（代码块的大小，代码块起始地址，提升进程权限）

一些在编程中经常要用到的功能编写成函数，方便使用.

#include <windows.h>

//系统类型
typedef enum SystemType
{
    WINDOWS_2000 = 1, //5.0
    WINDOWS_XP, //5.1
    WINDOWS__SERVER_2003, //5.2
    WINDOWS__SERVER_2003_R2, //5.2
    WINDOWS_VISTA, //6.0
    WINDOWS__SERVER_2008, //6.0
    WINDOWS__SERVER_2008_R2, //6.1
    WINDOWS_7, //6.1
    WINDOWS_SERVER_2012,//6.2
    WINDOWS_8//6.2
}ST;

/*******获取系统类型*******/
ST GetSystemType()
{
    OSVERSIONINFO osvi;
    ST st;

    ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
    osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);

    GetVersionEx(&osvi);


    if (osvi.dwMajorVersion==5)
    {
        if (osvi.dwMinorVersion==0)
        {
            st = WINDOWS_2000; //5.0
        }
        else if (osvi.dwMinorVersion==1)
        {
            st = WINDOWS_XP; //5.1
        }
        else if (osvi.dwMinorVersion==2)
        {
            st = WINDOWS__SERVER_2003; //5.2
        }
    }
    else if(osvi.dwMajorVersion==6)
    {
        if (osvi.dwMinorVersion==0)
        {
            st = WINDOWS_VISTA; //6.0
        }
        else if (osvi.dwMinorVersion==1)
        {
            st = WINDOWS_7; //6.1
        }
        else if (osvi.dwMinorVersion==2)
        {
            st = WINDOWS_8; //6.2
        }
    }

    return st;
}


/*找到代码块的大小*/
DWORD GetCodeSize(HANDLE hModule)
{
    if (!hModule) return 0;
    unsigned int nSize = 0;
    unsigned int v1;
    DWORD result;
    DWORD p = (DWORD)hModule;
    if ( *(WORD *)p == 0x5A4D && (v1 = p + *(DWORD *)(p + 0x3c), *(WORD *)v1 == 0x4550) )
        result = *(DWORD *)(v1 + 0x1c);
    else
        result = 0;

    return result;
}

/*找到代码块起始地址*/
DWORD GetCodeStart(HANDLE hModule)
{
    if (!hModule) return 0;

    unsigned int nSize = 0;
    unsigned int v1;
    DWORD result;
    DWORD p = (DWORD)hModule;
    if ( *(WORD *)p == 0x5A4D && (v1 = p + *(DWORD *)(p + 0x3c), *(WORD *)v1 == 0x4550) )
        result = *(DWORD *)(v1 + 0x2c);
    else
        result = 0;

    return (DWORD)hModule + result;
}

/*搜索代码特征，找到挂钩地址*/
BYTE* SearchOpcode(BYTE* pOpcodeBytes, unsigned int nOpcodeLen, const char* pLibName)
{
    BYTE * pCode = pOpcodeBytes;
    int nCodeLen = nOpcodeLen;
    HANDLE hModule;

    hModule = GetModuleHandleA(pLibName);

    DWORD dwCodeSize = GetCodeSize(hModule);
    DWORD dwCodeStart = GetCodeStart(hModule);
    for (DWORD i = 0; i<dwCodeSize; i++)
    {
        BYTE* p = (BYTE*)dwCodeStart+i;
        int j;
        for (j=0; j<nCodeLen; j++)
        {
            if (*(p+j)==pCode[j])
                continue;
            else
                break;
        }

        if (j==nCodeLen)
            return p;
        else
            continue;
    }

    return NULL;

}


BOOL Is64Bit_OS()
{
        BOOL bRetVal = FALSE;
        IsWow64Process(NULL, &bRetVal);
        return bRetVal;
}

单字节转多字节：

BOOL ThreadCheckFileTrust(CHAR* lpfileName)
{
    if (lpFileName == NULL)
    {
        return TRUE;
    }

    HCATADMIN hCatAdmin = NULL;

    DWORD dwNum = MultiByteToWideChar(CP_ACP,0,lpFileName,-1,NULL,0);
    wchar_t* pcwszFile = new wchar_t[dwNum];

    if (!pcwszFile)
    {
        return FALSE;
    }

    MultiByteToWideChar(CP_ACP,0,lpFileName,-1,pcwszFile,dwNum);

    BOOL bRet =  ThreadCheckFileTrustW(pcwszFile);

    delete pcwszFile;

    return bRet;
}

根据进程名称枚举进程：

static DWORD GetProcessID(wchar_t *ProcessName)  //获得进程PID
{
    PROCESSENTRY32 pe32;
    pe32.dwSize=sizeof(pe32);
    //获得系统内所有进程快照
    HANDLE hProcessSnap=CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);
    if(hProcessSnap==INVALID_HANDLE_VALUE)
    {
        OutputDebugStringA("CreateToolhelp32Snapshot error");
        return 0;
    }
    //枚举列表中的第一个进程
    BOOL bProcess=Process32First(hProcessSnap,&pe32);
    while(bProcess)
    {
        //比较找到的进程名和我们要查找的进程名，一样则返回进程id
        if(wcscmp(wcsupr(pe32.szExeFile),wcsupr(ProcessName))==0)
            return pe32.th32ProcessID;
        //继续查找
        bProcess=Process32Next(hProcessSnap,&pe32);
    }
    CloseHandle(hProcessSnap);
    return 0;
}

提升进程权限：

static int EnableDebugPriv(const char * name)  //提升进程为DEBUG权限--"SeDebugPrivilege"
{
    HANDLE hToken;
    TOKEN_PRIVILEGES tp;
    LUID luid;
    if(!OpenProcessToken(GetCurrentProcess(),
        TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY,
        &hToken) )
    {
        printf("OpenProcessToken error
");
        return 1;
    }
    if(!LookupPrivilegeValueA(NULL,name,&luid))
    {
        printf("LookupPrivilege error!
");
    }
    tp.PrivilegeCount = 1;
    tp.Privileges[0].Attributes =SE_PRIVILEGE_ENABLED;
    tp.Privileges[0].Luid = luid;

    if(!AdjustTokenPrivileges(hToken,0,&tp,sizeof(TOKEN_PRIVILEGES),NULL,NULL) )
    {
        printf("AdjustTokenPrivileges error!
");
        return 1;
    }
    return 0;
}

http://blog.csdn.net/chence19871/article/details/37881101