private/get-AuthorizationCode.ps1
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function get-AuthorizationCode{ <# Author = "Jos Lieben (jos@lieben.nu)" CompanyName = "Lieben Consultancy" Copyright = "https://www.lieben.nu/liebensraum/commercial-use/" #> $tcpListener = [System.Net.Sockets.TcpListener]::new([System.Net.IPAddress]::Any, 1985) $tcpListener.Start() $adminPrompt = "&prompt=admin_consent" $cachedModuleVersion = Join-Path -Path $env:APPDATA -ChildPath "M365Permissions.version" if(!(Test-Path $cachedModuleVersion)){ Set-Content -Path $cachedModuleVersion -Value $global:moduleVersion -Force }else{ if(([System.Version]::Parse((Get-Content -Path $cachedModuleVersion -Raw)) -lt [System.Version]::Parse($global:moduleVersion))){ Set-Content -Path $cachedModuleVersion -Value $global:moduleVersion -Force }else{ $adminPrompt = $Null } } $targetUrl = "https://login.microsoftonline.com/common/oauth2/authorize?client_id=$($global:LCClientId)&response_type=code&redirect_uri=http%3A%2F%2Flocalhost%3A1985&response_mode=query&resource=https://graph.microsoft.com$($adminPrompt)" try{ Write-Verbose "Opening $targetUrl in your browser..." Start-Process $targetUrl }catch{ Write-Host "Failed to open your browser, please go to $targetUrl" } $client = $tcpListener.AcceptTcpClient() Start-Sleep -s 1 $stream = $client.GetStream();$reader = New-Object System.IO.StreamReader($stream);$writer = New-Object System.IO.StreamWriter($stream);$requestLine = $reader.ReadLine() Start-Sleep -s 1 if($requestLine.Split("?")[1].StartsWith("code")){ Write-Verbose "Authorization code received, retrieving refresh token..." $code = $requestLine.Split("?")[1].Split("=")[1].Split("&")[0] }else{ Throw "Failed to receive auth code, please try again" } #thank the user for authenticating Start-Sleep -s 1 $writer.Write("HTTP/1.1 200 OK`r`nContent-Type: text/html; charset=UTF-8`r`n`r`n<html><head><title>M365 Permissions by Lieben Consultancy</title></head><body><p>Logged in, thank you! You may now close this window, the scan will continue in your PowerShell terminal :)</p></body></html>");$writer.Flush() Start-Sleep -s 1 $writer.Close();$reader.Close();$client.Close();$tcpListener.Stop() $irmSplat = @{ Uri = "https://login.microsoftonline.com/organizations/oauth2/v2.0/token" Method = 'Post' Body = @{ scope = "offline_access https://graph.microsoft.com/.default" code = $code client_id = $global:LCClientId grant_type = 'authorization_code' redirect_uri = "http://localhost:1985" } } #retrieve the refresh token $authResponse = (Invoke-RestMethod @irmSplat) $global:LCRefreshToken = $authResponse.refresh_token Write-Verbose "Refresh token cached until next module call :)" } |