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NetworkAPI: Several improvements

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This commit is contained in:
Tal Aloni 2017-02-17 18:22:15 +02:00
parent be50d30f27
commit 05f49c3128
1 changed files with 53 additions and 10 deletions
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63
SMBLibrary/Win32/Security/NetworkAPI.cs
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@ -13,6 +13,15 @@ namespace SMBLibrary.Win32.Security
{ {
public class NetworkAPI public class NetworkAPI
{ {
public const int NERR_Success = 0;
public const uint NERR_UserNotFound = 2221;
public const int MAX_PREFERRED_LENGTH = -1;
public const int FILTER_NORMAL_ACCOUNT = 2;
public const int UF_ACCOUNTDISABLE = 2;
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)] [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct USER_INFO_0 public struct USER_INFO_0
{ {
@ -44,16 +53,20 @@ namespace SMBLibrary.Win32.Security
public string groupname; public string groupname;
} }
// NetAPIBufferFree - Used to free buffer allocation after NetUserEnum / NetUserGetInfo / NetUserGetLocalGroups
[DllImport("Netapi32.dll")]
public extern static int NetApiBufferFree(IntPtr buffer);
// NetUserEnum - Obtains a list of all users on local machine or network // NetUserEnum - Obtains a list of all users on local machine or network
[DllImport("Netapi32.dll")] [DllImport("Netapi32.dll")]
public extern static int NetUserEnum(string servername, int level, int filter, out IntPtr bufptr, int prefmaxlen, out int entriesread, out int totalentries, out int resume_handle); public extern static int NetUserEnum([MarshalAs(UnmanagedType.LPWStr)]string servername, int level, int filter, out IntPtr bufPtr, int prefmaxlen, out int entriesread, out int totalentries, out int resume_handle);
// NetAPIBufferFree - Used to clear the Network buffer after NetUserEnum // NetUserGetInfo - Retrieves information about a particular user account on a server
[DllImport("Netapi32.dll")] [DllImport("Netapi32.dll")]
public extern static int NetApiBufferFree(IntPtr Buffer); public extern static int NetUserGetInfo([MarshalAs(UnmanagedType.LPWStr)]string servername, [MarshalAs(UnmanagedType.LPWStr)]string userName, int level, out IntPtr bufPtr);
[DllImport("Netapi32.dll")] [DllImport("Netapi32.dll")]
public extern static int NetUserGetLocalGroups([MarshalAs(UnmanagedType.LPWStr)]string servername,[MarshalAs(UnmanagedType.LPWStr)] string username, int level, int flags, out IntPtr bufptr, int prefmaxlen, out int entriesread, out int totalentries); public extern static int NetUserGetLocalGroups([MarshalAs(UnmanagedType.LPWStr)]string servername,[MarshalAs(UnmanagedType.LPWStr)] string username, int level, int flags, out IntPtr bufPtr, int prefmaxlen, out int entriesread, out int totalentries);
public static List<string> EnumerateGroups(string userName) public static List<string> EnumerateGroups(string userName)
{ {
@ -63,7 +76,11 @@ namespace SMBLibrary.Win32.Security
IntPtr bufPtr; IntPtr bufPtr;
const int Level = 0; const int Level = 0;
NetUserGetLocalGroups(null, userName, Level, 0, out bufPtr, 1024, out entriesRead, out totalEntries); int status = NetUserGetLocalGroups(null, userName, Level, 0, out bufPtr, MAX_PREFERRED_LENGTH, out entriesRead, out totalEntries);
if (status != NERR_Success)
{
throw new Exception("NetUserGetLocalGroups failed, Error code: " + status.ToString());
}
if (entriesRead > 0) if (entriesRead > 0)
{ {
@ -91,7 +108,11 @@ namespace SMBLibrary.Win32.Security
IntPtr bufPtr; IntPtr bufPtr;
const int Level = 0; const int Level = 0;
const int FILTER_NORMAL_ACCOUNT = 2; const int FILTER_NORMAL_ACCOUNT = 2;
NetUserEnum(null, Level, FILTER_NORMAL_ACCOUNT, out bufPtr, -1, out entriesRead, out totalEntries, out resume); int status = NetUserEnum(null, Level, FILTER_NORMAL_ACCOUNT, out bufPtr, MAX_PREFERRED_LENGTH, out entriesRead, out totalEntries, out resume);
if (status != NERR_Success)
{
throw new Exception("NetUserEnum failed, Error code: " + status.ToString());
}
if (entriesRead > 0) if (entriesRead > 0)
{ {
@ -116,10 +137,12 @@ namespace SMBLibrary.Win32.Security
int resume; int resume;
IntPtr bufPtr; IntPtr bufPtr;
const int Level = 1; int level = 1;
const int FILTER_NORMAL_ACCOUNT = 2; int status = NetUserEnum(null, level, FILTER_NORMAL_ACCOUNT, out bufPtr, MAX_PREFERRED_LENGTH, out entriesRead, out totalEntries, out resume);
const int UF_ACCOUNTDISABLE = 2; if (status != NERR_Success)
NetUserEnum(null, Level, FILTER_NORMAL_ACCOUNT, out bufPtr, -1, out entriesRead, out totalEntries, out resume); {
throw new Exception("NetUserEnum failed, Error code: " + status.ToString());
}
if (entriesRead > 0) if (entriesRead > 0)
{ {
@ -139,6 +162,26 @@ namespace SMBLibrary.Win32.Security
return result; return result;
} }
public static bool IsUserExists(string userName)
{
int level = 0;
IntPtr bufPtr;
int result = NetUserGetInfo(null, userName, level, out bufPtr);
if (result == NERR_Success)
{
NetApiBufferFree(bufPtr);
return true;
}
else if (result == NERR_UserNotFound)
{
return false;
}
else
{
throw new Exception("NetUserGetInfo failed, Error code: " + result.ToString());
}
}
public static List<string> EnumerateNetworkUsers() public static List<string> EnumerateNetworkUsers()
{ {
List<string> result = new List<string>(); List<string> result = new List<string>();