[英]Determine User Active Directory Groups from Local Machine off Network
[英]How to get a list of local machine groups / users when machine is not in active directory?
当Windows计算机不是AD成员并且无法使用LDAP搜索时,是否可以通过C#获取本地组和用户列表?
您可以使用P / Invoke调用本地网络管理API来获取本地用户名和组名:
static class NativeMethods {
[DllImport("netapi32.dll")]
public static extern void NetApiBufferFree(IntPtr bufptr);
[DllImport("netapi32.dll")]
public static extern UInt32 NetUserEnum([MarshalAs(UnmanagedType.LPWStr)] String servername, UInt32 level, UInt32 filter, ref IntPtr bufptr, UInt32 prefmaxlen, ref UInt32 entriesread, ref UInt32 totalentries, IntPtr resumehandle);
[DllImport("netapi32.dll")]
public static extern UInt32 NetLocalGroupEnum([MarshalAs(UnmanagedType.LPWStr)] String servername, UInt32 level, ref IntPtr bufptr, UInt32 prefmaxlen, ref UInt32 entriesread, ref UInt32 totalentries, IntPtr resumehandle);
[DllImport("Netapi32.dll")]
public extern static UInt32 NetLocalGroupGetMembers([MarshalAs(UnmanagedType.LPWStr)] String servername, [MarshalAs(UnmanagedType.LPWStr)] String localgroupname, UInt32 level, ref IntPtr bufptr, UInt32 prefmaxlen, ref UInt32 entriesread, ref UInt32 totalentries, IntPtr resumehandle);
}
该API可让您获取有关用户的各种信息。 如果只需要名称,则可以使用此功能:
IEnumerable<String> GetUserNames() {
var buffer = IntPtr.Zero;
try {
UInt32 entriesRead = 0;
UInt32 totalEntries = 0;
var result = NativeMethods.NetUserEnum(null, 0, 0, ref buffer, UInt32.MaxValue, ref entriesRead, ref totalEntries, IntPtr.Zero);
if (result != 0)
throw new Win32Exception((Int32) result);
var userNames = Enumerable
.Range(0, (Int32) 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);
}
}
LINQ语句用于“解析”包含USER_INFO_0
结构的缓冲区。 如果您要查询其他信息,则必须进行更详细的“解析”。
同样,您可以获得本地组名称:
IEnumerable<String> GetLocalGroupNames() {
var buffer = IntPtr.Zero;
try {
UInt32 entriesRead = 0;
UInt32 totalEntries = 0;
var result = NativeMethods.NetLocalGroupEnum(null, 0, ref buffer, UInt32.MaxValue, ref entriesRead, ref totalEntries, IntPtr.Zero);
if (result != 0)
throw new Win32Exception((Int32) result);
var localGroupNames = Enumerable
.Range(0, (Int32) 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);
}
}
缓冲区中的结构是LOCALGROUP_INFO_0
,其布局与USER_INFO_0
结构相同,因此“解析”代码相同。
最后,这是如何使用LOCALGROUP_MEMBERS_INFO_3
结构获取组成员身份的方法:
IEnumerable<String> GetLocalGroupUsers(String localGroupName) {
var buffer = IntPtr.Zero;
try {
UInt32 entriesRead = 0;
UInt32 totalEntries = 0;
var result = NativeMethods.NetLocalGroupGetMembers(null, localGroupName, 3, ref buffer, UInt32.MaxValue, ref entriesRead, ref totalEntries, IntPtr.Zero);
if (result != 0)
throw new Win32Exception((Int32) result);
var userNames = Enumerable
.Range(0, (Int32) 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);
}
}
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