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January 5, 2024 08:23
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This script starts a small web server listening on localhost:8080 that will impersonate the authenticated user and serve static content. This means if they do not have NTFS permissions to the file they will get an access denied or a 404 file not found if they do not have NTFS access to list contents of the directory.
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| function Get-DirectoryContent { | |
| <# | |
| .SYNOPSIS | |
| Function to get directory content | |
| .EXAMPLE | |
| Get-DirectoryContent -Path "C:\" -HeaderName "poshserver.net" -RequestURL "http://poshserver.net" -SubfolderName "/" | |
| #> | |
| [CmdletBinding(SupportsShouldProcess = $true)] | |
| param ( | |
| [Parameter( | |
| Mandatory = $true, | |
| HelpMessage = 'Directory Path')] | |
| [string]$Path, | |
| [Parameter( | |
| Mandatory = $false, | |
| HelpMessage = 'Header Name')] | |
| [string]$HeaderName, | |
| [Parameter( | |
| Mandatory = $false, | |
| HelpMessage = 'Request URL')] | |
| [string]$RequestURL, | |
| [Parameter( | |
| Mandatory = $false, | |
| HelpMessage = 'Subfolder Name')] | |
| [string]$SubfolderName, | |
| [string]$Root | |
| ) | |
| @" | |
| <html> | |
| <head> | |
| <title>$($HeaderName)</title> | |
| </head> | |
| <body> | |
| <h1>$($HeaderName) - $($SubfolderName)</h1> | |
| <hr> | |
| "@ | |
| @" | |
| <a href="./../">[To Parent Directory]</a><br><br> | |
| <table cellpadding="5"> | |
| "@ | |
| $Files = (Get-ChildItem "$Path") | |
| foreach ($File in $Files) | |
| { | |
| $FileURL = ($File.FullName -replace [regex]::Escape($Root), "" ) -replace "\\","/" | |
| if (!$File.Length) { $FileLength = "[dir]" } else { $FileLength = $File.Length } | |
| @" | |
| <tr> | |
| <td align="right">$($File.LastWriteTime)</td> | |
| <td align="right">$($FileLength)</td> | |
| <td align="left"><a href="$($FileURL)">$($File.Name)</a></td> | |
| </tr> | |
| "@ | |
| } | |
| @" | |
| </table> | |
| <hr> | |
| </body> | |
| </html> | |
| "@ | |
| } | |
| [System.Reflection.Assembly]::LoadWithPartialName("System.Web") | |
| $listener = New-Object System.Net.HttpListener | |
| $listener.Prefixes.Add("http://localhost:8080/") | |
| $listener.AuthenticationSchemes = [System.Net.AuthenticationSchemes]::IntegratedWindowsAuthentication | |
| $listener.Start() | |
| New-PSDrive -Name FileServe -PSProvider FileSystem -Root $PWD.Path | |
| $Root = $PWD.Path | |
| cd FileServe:\ | |
| do { | |
| $context = $listener.GetContext() | |
| $requestUrl = $context.Request.Url | |
| $response = $context.Response | |
| $context.User.Identity.Impersonate() | |
| Write-Host "> $requestUrl" | |
| $Content = "" | |
| $localPath = $requestUrl.LocalPath | |
| try{ | |
| $RequestedItem = Get-Item -LiteralPath "FileServe:\$localPath" -Force -ErrorAction Stop | |
| $FullPath = $RequestedItem.FullName | |
| if($RequestedItem.Attributes -match "Directory") { | |
| $Content = Get-DirectoryContent -Path $FullPath -HeaderName "PowerShell FileServer" -RequestURL "http://localhost:8080" -SubfolderName $localPath -Root $Root | |
| $Encoding = [system.Text.Encoding]::UTF8 | |
| $Content = $Encoding.GetBytes($Content) | |
| $response.ContentType = "text/html" | |
| } else { | |
| $Content = [System.IO.File]::ReadAllBytes($FullPath) | |
| $response.ContentType = [System.Web.MimeMapping]::GetMimeMapping($FullPath) | |
| } | |
| } catch [System.UnauthorizedAccessException] { | |
| Write-Host "Access Denied" | |
| Write-Host "Current user: $([System.Security.Principal.WindowsIdentity]::GetCurrent().Name)" | |
| Write-Host "Requested File: FileServe:\$localPath" | |
| $response.StatusCode = 404 | |
| $Content = [System.Text.Encoding]::UTF8.GetBytes("<h1>404 - Page not found</h1>") | |
| } catch [System.Management.Automation.ItemNotFoundException] { | |
| Write-Host "No route found for: FileServe:\$localPath" | |
| $response.StatusCode = 404 | |
| $Content = [System.Text.Encoding]::UTF8.GetBytes("<h1>404 - Page not found</h1>") | |
| } catch { | |
| $_ | |
| $Content = "$($_.InvocationInfo.MyCommand.Name) : $($_.Exception.Message)" | |
| $Content += "$($_.InvocationInfo.PositionMessage)" | |
| $Content += " + $($_.CategoryInfo.GetMessage())" | |
| $Content += " + $($_.FullyQualifiedErrorId)" | |
| $Content = [System.Text.Encoding]::UTF8.GetBytes($Content) | |
| $response.StatusCode = 500 | |
| } | |
| $response.ContentLength64 = $Content.Length | |
| $response.OutputStream.Write($Content, 0, $Content.Length) | |
| $response.Close() | |
| $responseStatus = $response.StatusCode | |
| Write-Host "< $responseStatus" | |
| } while ($listener.IsListening) |
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