更改命名管道访问权限

Change Named Pipe Access Permissions

我使用 System.IO.Pipes 创建了一个命名管道。在我不得不 运行 管理员模式下的程序之前,它工作正常。提升后,客户端无法再连接(客户端未 运行ning 提升)。如果我 运行 客户端作为管理员,它连接正常所以它看起来像一个权限问题。我一直在研究如何解决这个问题,但没有成功(我发现处理 Windows 安全问题令人难以置信)。我的目标是允许任何客户端——无论是否提升——能够连接到管道。

我改变的第一件事是打开具有访问权限的管道:

pipeServer = new NamedPipeServerStream(pipeName,
                                       PipeDirection.InOut,
                                       1,
                                       PipeTransmissionMode.Message,
                                       PipeOptions.Asynchronous,
                                       0x4000,
                                       0x400,
                                       null,
                                       HandleInheritability.Inheritable,
                                       PipeAccessRights.ChangePermissions | PipeAccessRights.AccessSystemSecurity);

然后我把这段代码拼凑在一起。一切正常,直到 SetEntriesInAcl 调用失败:

Error: 0x534
"No mapping between account names and security IDs was done."

IntPtr ownerSid = IntPtr.Zero;
IntPtr groupSid = IntPtr.Zero;
IntPtr dacl = IntPtr.Zero, newDacl = IntPtr.Zero;
IntPtr sacl = IntPtr.Zero;
IntPtr securityDescriptor = IntPtr.Zero;
if (SUCCEEDED(GetSecurityInfo(pipeServer.SafePipeHandle.handle.DangerousGetHandle(),                                                  
                              SE_OBJECT_TYPE.SE_KERNEL_OBJECT,
                              SECURITY_INFORMATION.DACL_SECURITY_INFORMATION,
                              out ownerSid,
                              out groupSid,
                              out dacl,
                              out sacl,
                              out securityDescriptor))) {
    EXPLICIT_ACCESS ea = new EXPLICIT_ACCESS();
    BuildExplicitAccessWithName(ref ea, "Everyone", GENERIC_ALL, ACCESS_MODE.GRANT_ACCESS, NO_INHERITANCE);
    // Next line fails
    if (SUCCEEDED(SetEntriesInAcl(1, ref ea, dacl, out newDacl))) {
        uint retval = SetSecurityInfo(handle,
                             SE_OBJECT_TYPE.SE_KERNEL_OBJECT,
                             SECURITY_INFORMATION.DACL_SECURITY_INFORMATION,
                             IntPtr.Zero,
                             IntPtr.Zero,
                             newDacl,
                             IntPtr.Zero);
                        // Haven't reached this point yet
    }
}

BuildExplicitAccessWithName 函数没有 return 值,但似乎成功了。这是调用后的样子:

如有任何帮助,我将不胜感激。

(所有 Win32 函数和数据类型都在 pinvoke.net 上找到。另外,我使用的是 Windows 10。)

我最终不必使用任何本机调用。 PipeSecurity class 有效。诀窍是我必须将它传递给构造函数:

// Creates a PipeSecurity that allows users read/write access
PipeSecurity CreateSystemIOPipeSecurity()
{
    PipeSecurity pipeSecurity = new PipeSecurity();

    var id = new SecurityIdentifier(WellKnownSidType.AuthenticatedUserSid, null);

    // Allow Everyone read and write access to the pipe. 
    pipeSecurity.SetAccessRule(new PipeAccessRule(id, PipeAccessRights.ReadWrite, AccessControlType.Allow));

    return pipeSecurity;
} 

创建管道时使用该函数:

PipeSecurity pipeSecurity = CreateSystemIOPipeSecurity();
pipeServer = new NamedPipeServerStream(pipeName,
                                       PipeDirection.InOut,
                                       1,
                                       PipeTransmissionMode.Message,
                                       PipeOptions.Asynchronous,
                                       0x4000,
                                       0x400,
                                       pipeSecurity,
                                       HandleInheritability.Inheritable);