Armin Zingler said:
Dim files = IO.Directory.GetFiles("e:\", "*.bat")
Recursion is the key: (untested)
Private Shared Sub CollectBatchFiles( _
ByVal Directory As IO.DirectoryInfo, _
ByVal Collection As List(Of IO.FileInfo))
Collection.AddRange(Directory.GetFiles("*.bat"))
For Each SubDir In Directory.GetDirectories
CollectBatchFiles(SubDir, Collection)
Next
End Sub
Call:
Dim BatFiles As New List(Of IO.FileInfo)
CollectBatchFiles(New IO.DirectoryInfo("e:\"), BatFiles)
Search for "Impersonation". I'm afraid, I don't have an example handy.
Only
found it via good old pInvoke (LogonUser), and I don't know if there's an
equivalent in the Framework.
Armin
I also couldn`t find a good working equivalant in the framework in the past
, so i wrapped it all in a nice class
#### CLASS CODE ######
'Michel Posseth 10-07-2008
Imports System.Security
Imports System.Security.Principal
Imports System.Runtime.InteropServices
Public Class ImpersonateSpecificUser
Implements IDisposable
Private Const LOGON32_LOGON_INTERACTIVE As Integer = 2
Private Const LOGON32_PROVIDER_DEFAULT As Integer = 0
Private impersonationContext As WindowsImpersonationContext
Declare Function LogonUserA 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
Declare Auto Function DuplicateToken Lib "advapi32.dll" ( _
ByVal ExistingTokenHandle As IntPtr, _
ByVal ImpersonationLevel As Integer, _
ByRef DuplicateTokenHandle As IntPtr) As Integer
Declare Auto Function RevertToSelf Lib "advapi32.dll" () As Long
Declare Auto Function CloseHandle Lib "kernel32.dll" (ByVal handle As
IntPtr) As Long
Public Event eSpecificUserImpersonation(ByVal Success As Boolean)
Private _Impersonated As Boolean
''' <summary>
''' Gets or sets a value indicating whether this <see
cref="ImpersonateSpecificUser" /> is impersonated.
''' </summary>
''' <value><c>true</c> if impersonated; otherwise, <c>false</c>.</value>
Public Property Impersonated() As Boolean
Get
Return _Impersonated
End Get
Private Set(ByVal value As Boolean)
_Impersonated = value
End Set
End Property
''' <summary>
''' Initializes a new instance of the <see
cref="ImpersonateSpecificUser" /> class.
''' </summary>
''' <param name="UserName">Name of the user.</param>
''' <param name="Password">The password.</param>
''' <param name="Domain">The domain.</param>
Public Sub New(ByVal UserName As String, ByVal Password As String, ByVal
Domain As String)
If impersonateValidUser(UserName, Domain, Password) Then
'Insert your code that runs under the security context of a
specific user here.
RaiseEvent eSpecificUserImpersonation(True)
Else
'Your impersonation failed. Therefore, include a fail-safe
mechanism here.
RaiseEvent eSpecificUserImpersonation(False)
End If
End Sub
''' <summary>
''' Impersonates the valid user.
''' </summary>
''' <param name="userName">Name of the user.</param>
''' <param name="domain">The domain.</param>
''' <param name="password">The password.</param>
''' <returns></returns>
Private Function impersonateValidUser(ByVal userName As String, ByVal
domain As String, ByVal password As String) As Boolean
Dim tempWindowsIdentity As WindowsIdentity
Dim token As IntPtr = IntPtr.Zero
Dim tokenDuplicate As IntPtr = IntPtr.Zero
impersonateValidUser = False
If RevertToSelf() Then
If LogonUserA(userName, domain, password,
LOGON32_LOGON_INTERACTIVE, LOGON32_PROVIDER_DEFAULT, token) <> 0 Then
If DuplicateToken(token, 2, tokenDuplicate) <> 0 Then
tempWindowsIdentity = New
WindowsIdentity(tokenDuplicate)
impersonationContext = tempWindowsIdentity.Impersonate()
If Not impersonationContext Is Nothing Then
impersonateValidUser = True
End If
End If
End If
End If
If Not tokenDuplicate.Equals(IntPtr.Zero) Then
CloseHandle(tokenDuplicate)
End If
If Not token.Equals(IntPtr.Zero) Then
CloseHandle(token)
End If
End Function
''' <summary>
''' Undoes the impersonation.
''' </summary>
Public Sub undoImpersonation()
impersonationContext.Undo()
Impersonated = False
End Sub
#Region " IDisposable Support "
Private disposedValue As Boolean = False ' To detect redundant
calls
' IDisposable
Protected Overridable Sub Dispose(ByVal disposing As Boolean)
If Not Me.disposedValue Then
If disposing Then
' TODO: free other state (managed objects).
End If
If Impersonated Then 'wees er zeer van dat we weer in een
normale context draaien
undoImpersonation()
End If
' TODO: free your own state (unmanaged objects).
' TODO: set large fields to null.
End If
Me.disposedValue = True
End Sub
' This code added by Visual Basic to correctly implement the disposable
pattern.
Public Sub Dispose() Implements IDisposable.Dispose
' Do not change this code. Put cleanup code in Dispose(ByVal
disposing As Boolean) above.
Dispose(True)
GC.SuppressFinalize(Me)
End Sub
#End Region
''' <summary>
''' Impersonates the specific user_e specific user impersonation.
''' </summary>
''' <param name="Success">if set to <c>true</c> [success].</param>
Private Sub ImpersonateSpecificUser_eSpecificUserImpersonation(ByVal
Success As Boolean) Handles Me.eSpecificUserImpersonation
Me.Impersonated = Success
End Sub
End Class
#### END CLASS CODE ####
### USAGE ###
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click
Using UImp As New
ista.security.UserImpersonate.ImpersonateSpecificUser("Username",
"'Password", "Domain")
MsgBox(UImp.Impersonated)
'if above msgbox returned true
'all code in the using block will be run in the context of the impersonated
user
' so for instance shares are accessible that are normally only accessible
to that user , and you have the rights in these shares of that user etc etc
' the code is thoroughly tested in my company and is in unmodified form in
use in a win 2000 , 2003 , 2008 active directory domain with XP and Vista
clients
End Using
End Sub
End Class
regards
Michel Posseth
