1

我写了一个代码来检查在同一台机器上运行的进程是否具有管理员权限。但它总是返回 false。

你能告诉我它有什么问题吗？

private static bool HasAdminPrivileges(int processId)
{
    var hProcess = WinApi.OpenProcess(ProcessAccessFlags.QueryInformation, false, processId);
    var opened = WinApi.OpenProcessToken(hProcess, WinApi.TOKEN_QUERY, out IntPtr hToken);
    if (opened)
    {
        var token = new IntPtr(hProcess.ToInt64() + hToken.ToInt64()); // 64 bit machine only

        WinApi.CreateWellKnownSid(WELL_KNOWN_SID_TYPE.WinBuiltinAdministratorsSid, IntPtr.Zero, IntPtr.Zero, out uint cbSidUint);
        var cbSid = new IntPtr(cbSidUint);

        var succeed = WinApi.CheckTokenMembership(token, cbSid, out bool isMember);

        return succeed && isMember;
    }
    return false;
}

public class WinApi
{
    public const int TOKEN_QUERY = 0X00000008;

    [DllImport("advapi32.dll", SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    public static extern bool OpenProcessToken(IntPtr ProcessHandle, UInt32 DesiredAccess, out IntPtr TokenHandle);

    [DllImport("kernel32.dll", SetLastError = true)]
    public static extern IntPtr OpenProcess(ProcessAccessFlags processAccess, bool bInheritHandle, int processId);    

    [DllImport("advapi32.dll", SetLastError = true)]
    public static extern bool CreateWellKnownSid(WELL_KNOWN_SID_TYPE WellKnownSidType, IntPtr DomainSid, IntPtr pSid, out uint cbSid);    

    [DllImport("advapi32.dll", SetLastError = true)]
    public static extern bool CheckTokenMembership(IntPtr TokenHandle, IntPtr SidToCheck, out bool IsMember);
}

public enum ProcessAccessFlags : uint
{
    QueryInformation = 0x00000400
}

public enum WELL_KNOWN_SID_TYPE
{
    WinBuiltinAdministratorsSid = 26
}
4

2 回答 2

4

您不能将句柄添加在一起 ​​( new IntPtr(hProcess.ToInt64() + hToken.ToInt64());)，这是没有意义的。

您需要进程句柄来获取进程令牌句柄，然后将令牌句柄传递给CheckTokenMembership.

您还需要使用 关闭这些句柄CloseHandle。

using System;
using System.Runtime.InteropServices;
...
public class WinApi
{
    public const int TOKEN_DUPLICATE = 0x0002;
    public const int TOKEN_QUERY = 0x00000008;
    public const int SecurityImpersonation = 2;
    public const int TokenImpersonation = 2;

    [DllImport("advapi32.dll", SetLastError = true)] [return: MarshalAs(UnmanagedType.Bool)]
    public static extern bool OpenProcessToken(IntPtr ProcessHandle, UInt32 DesiredAccess, out IntPtr TokenHandle);
    [DllImport("advapi32.dll", SetLastError = true)] [return: MarshalAs(UnmanagedType.Bool)]
    public static extern bool DuplicateTokenEx(IntPtr hTok, UInt32 DesiredAccess, IntPtr SecAttPtr, int ImpLvl, int TokType, out IntPtr TokenHandle);

    [DllImport("kernel32.dll", SetLastError = true)]
    public static extern IntPtr OpenProcess(ProcessAccessFlags processAccess, bool bInheritHandle, int processId);

    [DllImport("advapi32.dll", SetLastError = true)] [return: MarshalAs(UnmanagedType.Bool)]
    public static extern bool CreateWellKnownSid(WELL_KNOWN_SID_TYPE WellKnownSidType, IntPtr DomainSid, IntPtr pSid, ref uint cbSid);

    [DllImport("advapi32.dll", SetLastError = true)] [return: MarshalAs(UnmanagedType.Bool)]
    public static extern bool CheckTokenMembership(IntPtr TokenHandle, IntPtr SidToCheck, out bool IsMember);

    [DllImport("kernel32.dll", SetLastError = true)]
    public static extern int GetCurrentProcessId();
    [DllImport("kernel32.dll", SetLastError = true)]
    public static extern int CloseHandle(IntPtr h);
}

public enum ProcessAccessFlags : uint
{
    QueryInformation = 0x00000400,
    QueryLimitedInformation = 0x1000
}

public enum WELL_KNOWN_SID_TYPE
{
    WinBuiltinAdministratorsSid = 26
}

private static bool IsAdminGroupMember(int processId)
{
    IntPtr hPriToken = IntPtr.Zero, hImpToken = IntPtr.Zero;
    var hProcess = WinApi.OpenProcess(ProcessAccessFlags.QueryLimitedInformation, false, processId);
    if (hProcess == IntPtr.Zero) hProcess = WinApi.OpenProcess(ProcessAccessFlags.QueryInformation, false, processId); // < Vista
    var haveToken = WinApi.OpenProcessToken(hProcess, WinApi.TOKEN_DUPLICATE, out hPriToken);
    if (haveToken) 
    {
        haveToken = WinApi.DuplicateTokenEx(hPriToken, WinApi.TOKEN_QUERY, IntPtr.Zero, WinApi.SecurityImpersonation, WinApi.TokenImpersonation, out hImpToken);
        WinApi.CloseHandle(hPriToken);
    }
    if (hProcess != IntPtr.Zero) WinApi.CloseHandle(hProcess);
    if (haveToken)
    {
        uint cbSid = 0;
        bool isMember = false;
        WinApi.CreateWellKnownSid(WELL_KNOWN_SID_TYPE.WinBuiltinAdministratorsSid, IntPtr.Zero, IntPtr.Zero, ref cbSid);
        IntPtr pSid = Marshal.AllocCoTaskMem(Convert.ToInt32(cbSid));
        var succeed = pSid != IntPtr.Zero && WinApi.CreateWellKnownSid(WELL_KNOWN_SID_TYPE.WinBuiltinAdministratorsSid, IntPtr.Zero, pSid, ref cbSid);
        succeed = succeed && WinApi.CheckTokenMembership(hImpToken, pSid, out isMember);
        Marshal.FreeCoTaskMem(pSid);
        WinApi.CloseHandle(hImpToken);
        return succeed && isMember;
    }
    return false;
}


[STAThread]static void Main(/*string[] args*/) 
{

    bool admin = IsAdminGroupMember(WinApi.GetCurrentProcessId());
    Console.WriteLine(string.Format("IsAdminGroupMember={0}", admin));
}
于 2018-11-24T15:59:44.727 回答
1

我使用 Anders 提供的解决方案创建了 Process.Extensions.dll 扩展

using System;
using ProcessExtensions;
using System.Diagnostics;
static void Main(string[] args)
{
    bool isAdminGroupMember = Process.GetCurrentProcess().IsAdminGroupMember();
    Console.WriteLine(string.Format("IsAdminGroupMember={0}", isAdminGroupMember));
}

https://github.com/IamhereTeam/Process.Extensions.git

Process.Extensions.dll

于 2018-11-24T17:30:15.300 回答