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LocalGroups.cs
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#region License
//------------------------------------------------------------------------------
// Copyright (c) 2020 Dmitrii Evdokimov
// Source https://github.com/diev/
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//------------------------------------------------------------------------------
// (c) https://stackoverflow.com/questions/33923951/how-to-get-a-list-of-local-machine-groups-users-when-machine-is-not-in-active
//------------------------------------------------------------------------------
#endregion License
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Runtime.InteropServices;
namespace WhoCan
{
public static class LocalGroups
{
public static IEnumerable<string> GetUserNames()
{
var buffer = IntPtr.Zero;
try
{
uint entriesRead = 0;
uint totalEntries = 0;
var result = NativeMethods.NetUserEnum(null, 0, 0, ref buffer, uint.MaxValue, ref entriesRead, ref totalEntries, IntPtr.Zero);
if (result != 0)
{
throw new Win32Exception((int)result);
}
var userNames = Enumerable
.Range(0, (int)entriesRead)
.Select(i => {
var userInfo = Marshal.ReadIntPtr(buffer, i * IntPtr.Size);
var userName = Marshal.PtrToStringAuto(userInfo);
return userName;
})
.ToList();
return userNames;
}
finally
{
NativeMethods.NetApiBufferFree(buffer);
}
}
public static IEnumerable<string> GetLocalGroupNames()
{
var buffer = IntPtr.Zero;
try
{
uint entriesRead = 0;
uint totalEntries = 0;
var result = NativeMethods.NetLocalGroupEnum(null, 0, ref buffer, uint.MaxValue, ref entriesRead, ref totalEntries, IntPtr.Zero);
if (result != 0)
{
throw new Win32Exception((int)result);
}
var localGroupNames = Enumerable
.Range(0, (int)entriesRead)
.Select(i => {
var localGroupInfo = Marshal.ReadIntPtr(buffer, i * IntPtr.Size);
var groupName = Marshal.PtrToStringAuto(localGroupInfo);
return groupName;
})
.ToList();
return localGroupNames;
}
finally
{
NativeMethods.NetApiBufferFree(buffer);
}
}
public static IEnumerable<string> GetLocalGroupUsers(string localGroupName)
{
var buffer = IntPtr.Zero;
try
{
uint entriesRead = 0;
uint totalEntries = 0;
var result = NativeMethods.NetLocalGroupGetMembers(null, localGroupName, 3, ref buffer, uint.MaxValue, ref entriesRead, ref totalEntries, IntPtr.Zero);
if (result != 0)
{
throw new Win32Exception((int)result);
}
var userNames = Enumerable
.Range(0, (int)entriesRead)
.Select(i => {
var membersInfo = Marshal.ReadIntPtr(buffer, i * IntPtr.Size);
var userName = Marshal.PtrToStringAuto(membersInfo);
return userName;
})
.ToList();
return userNames;
}
finally
{
NativeMethods.NetApiBufferFree(buffer);
}
}
}
}