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Declare Auto Function LogonUser Lib "advapi32.dll" (ByVal lpszUsername As String, _
ByVal lpszDomain As String, ByVal lpszPassword As String, ByVal dwLogonType As Integer, _
ByVal dwLogonProvider As Integer, ByRef phToken As IntPtr) As Integer
See MSDN docs for description of various logon types etc.
Tips & Tricks:
The DuplicateHandle trick is only needed if you do not have a primary token. This can be avoided by not using LogonType.Network when calling LogonUser.
Sample Code:
IntPtr hToken = IntPtr.Zero;
if(!LogonUser(username, domain, password, LogonType.Interactive, LogonProvider.Default, out hToken))
throw new Win32Exception(Marshal.GetLastWin32Error());
if(hToken != IntPtr.Zero)
CloseHandle(hToken);
Alternative Managed API:
Do you know one? Please contribute it!
The DuplicateHandle API
12/18/2008 8:08:02 AM - -82.137.167.2
The LogonUserEx function attempts to log a user on to the local computer. The local computer is the computer from which LogonUserEx was called. You cannot use LogonUserEx to log on to a remote computer. You specify the user with a user name and domain, and authenticate the user with a plaintext password. If the function succeeds, you receive a handle to a token that represents the logged-on user. You can then use this token handle to impersonate the specified user or, in most cases, to create a process that runs in the context of the specified user.
11/24/2010 12:30:59 PM - -95.223.169.177
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