Public/Request-OAuthApp.ps1
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# TODO documentation of parameters function Request-OAuthApp { [CmdletBinding()] <# .SYNOPSIS Requesting oAuth v2 flow for an app via app link .DESCRIPTION Apteco PS Modules - PowerShell OAuthV2 flow .PARAMETER ClientID The client id that will be sent in this flow .PARAMETER ClientSecret The client secret that will be sent in this flow - this should be kept secret!!! .PARAMETER Scope Optionally used parameter to request specific rights. The scope that will be sent in the first step of the oauth flow .PARAMETER State The state is optionally used and normally uses a random string in multiple steps of this flow to prevent CSRF attacks .PARAMETER AuthUrl The auth url that will be used to initiate this flow .PARAMETER TokenUrl The token url that will be used to exchange the code into a token .PARAMETER Protocol The app protocol that should be used like apttoken54321://localhost/ .PARAMETER SettingsFile The path to the json file where all settings from this flow are saved into .PARAMETER EncryptToken Should the token be saved encrypted in the resulting json file .PARAMETER SaveSeparateTokenFile Should the access token be saved in a separate file and not only in the json file? .PARAMETER TokenFile The path to the access token file, when the switch SaveSeparateTokenFile is set .PARAMETER SaveExchangedPayload Do you want to save the payload of the second call, which could contain important information .PARAMETER PayloadToSave If you want to save more information in the settingsfile, e.g. for refreshing the token, put it in here .EXAMPLE import-module PSOAuth -Verbose $oauthParam = [Hashtable]@{ "ClientId" = "ssCNo32SNf" "ClientSecret" = "" # ask for this at Apteco, if you don't have your own app "AuthUrl" = "https://rest.cleverreach.com/oauth/authorize.php" "TokenUrl" = "https://rest.cleverreach.com/oauth/token.php" "SaveSeparateTokenFile" = $true } Request-OAuthApp @oauthParam -Verbose .EXAMPLE TODO SALESFORCE EXAMPLE .INPUTS String .OUTPUTS $null .NOTES Author: florian.von.bracht@apteco.de #> param ( [Parameter(Mandatory=$true)][String]$ClientId ,[Parameter(Mandatory=$true)][String]$ClientSecret ,[Parameter(Mandatory=$true)][Uri]$AuthUrl ,[Parameter(Mandatory=$true)][Uri]$TokenUrl ,[Parameter(Mandatory=$false)][String]$Scope = "" # Supported since 0.0.6 ,[Parameter(Mandatory=$false)][String]$State = "" # Supported since 0.0.6 ,[Parameter(Mandatory=$false)][String]$Protocol = "apttoken$( Get-RandomString -length 6 -ExcludeSpecialChars )" ,[Parameter(Mandatory=$false)][String]$SettingsFile = "./settings.json" ,[Parameter(Mandatory=$false)][String]$TokenFile = "./oauth.token" #,[Parameter(Mandatory=$false)][String]$CallbackFile = "$( $env:TEMP )\crcallback.txt" ,[Parameter(Mandatory=$false)][Switch]$SaveSeparateTokenFile = $false ,[Parameter(Mandatory=$false)][Switch]$EncryptToken = $false ,[Parameter(Mandatory=$false)][PSCustomObject]$PayloadToSave = [PSCustomObject]@{} ,[Parameter(Mandatory=$false)][Switch]$SaveExchangedPayload = $false # Do you want to save the payload of the second call, which could contain important information ) begin { #----------------------------------------------- # SET LOGFILE #----------------------------------------------- # Set log file here, otherwise it could interrupt the process when launched headless from .net in System32 Set-Logfile -Path "./psoauth.log" #----------------------------------------------- # ASK FOR SETTINGSFILE #----------------------------------------------- <# # Default file $settingsFileDefault = "./settings.json" # Ask for another path $settingsFile = Read-Host -Prompt "Where do you want the settings file to be saved? Just press Enter for this default [$( $settingsFileDefault )]" # ALTERNATIVE: The file dialog is not working from Visual Studio Code, but is working from PowerShell ISE or "normal" PowerShell Console #$settingsFile = Set-FileName -initialDirectory "$( $scriptPath )" -filter "JSON files (*.json)|*.json" # If prompt is empty, just use default path if ( $settingsFile -eq "" -or $null -eq $settingsFile) { $settingsFile = $settingsFileDefault } #> # Check if filename is valid if(Test-Path -LiteralPath $SettingsFile -IsValid ) { Write-Log "SettingsFile '$( $SettingsFile )' is valid" } else { Write-Log "SettingsFile '$( $SettingsFile )' contains invalid characters" } #----------------------------------------------- # ASK FOR TOKENFILE #----------------------------------------------- <# # Default file $tokenFileDefault = "./oauth.token" # Ask for another path $tokenFile = Read-Host -Prompt "Where do you want the token file to be saved? Just press Enter for this default [$( $tokenFileDefault )]" # ALTERNATIVE: The file dialog is not working from Visual Studio Code, but is working from PowerShell ISE or "normal" PowerShell Console #$settingsFile = Set-FileName -initialDirectory "$( $scriptPath )" -filter "JSON files (*.json)|*.json" # If prompt is empty, just use default path if ( $tokenFile -eq "" -or $null -eq $tokenFile) { $tokenFile = $tokenFileDefault } #> # Check if filename is valid if(Test-Path -LiteralPath $tokenFile -IsValid ) { Write-Log "SettingsFile '$( $tokenFile )' is valid" } else { Write-Log "SettingsFile '$( $tokenFile )' contains invalid characters" } } process { try { #----------------------------------------------- # CONFIRM FOR NEXT STEPS #----------------------------------------------- # Confirm you want to proceed $proceed = $Host.UI.PromptForChoice("New Token", "This will create a NEW token. Previous tokens will be invalid immediatly. Please confirm you are sure to proceed?", @('&Yes'; '&No'), 1) # Leave if answer is not yes If ( $proceed -eq 0 ) { Write-Log -message "Asked for confirmation of new token creation. Answer was 'yes'" } else { Write-Log -message "Asked for confirmation of new token creation. Answer was 'No'" Write-Log -message "Leaving the script now" exit 0 } #----------------------------------------------- # SETTINGS FOR THE TOKEN CREATION #----------------------------------------------- #$clientCred = New-Object PSCredential $ClientId,$ClientSecret $CallbackFile = "$( $env:TEMP )\callback.txt" #----------------------------------------------- # PREPARE REGISTRY #----------------------------------------------- # current path - will get back to this at the end $currentLocation = Get-Location # Switch to registry - choose the current user to not need admin rights $root = "Registry::HKEY_CURRENT_USER\Software\Classes" # User registry - needs no elevated rights # $root = "Registry::HKEY_CLASSES_ROOT" # Global registry - needs admin rights Write-Log -message "Putting new registry entries into '$( $root )' with custom protocol '$( $Protocol )'" Set-Location -Path $root # Remove the registry entries, if already existing If ( Test-Path -path $Protocol ) { Write-Log -message "Custom protocol folder was already existing. Removing it now." Remove-Item -Path $Protocol -Force } # Create the base entries now New-Item -Path $Protocol New-ItemProperty -Path $Protocol -Name "(Default)" -PropertyType String -Value "URL:$( $Protocol )" New-ItemProperty -Path $Protocol -Name "URL Protocol" -PropertyType String -Value "" # Create more keys and properties for sub items Set-Location -Path ".\$( $Protocol )" New-Item -Path ".\DefaultIcon" New-Item -Path ".\shell\open\command" -force # Creates the items recursively New-ItemProperty -Path ".\shell\open\command" -Name "(Default)" -PropertyType String -Value """powershell.exe"" -File ""$( $Script:moduleRoot )\bin\callback.ps1"" ""%1""" # Go back to original path Set-Location -path $currentLocation.Path Write-Log -message "Created the registry entries" #----------------------------------------------- # OAUTHv2 PROCESS - STEP 1 #----------------------------------------------- # Prepare redirect URI $redirectUri = "$( $Protocol )://localhost" # STEP 1: Prepare the first call to let the user log into the service # SOURCE: https://powershellmagazine.com/2019/06/14/pstip-a-better-way-to-generate-http-query-strings-in-powershell/ $nvCollection = [System.Web.HttpUtility]::ParseQueryString([String]::Empty) $nvCollection.Add('response_type','code') $nvCollection.Add('client_id',$ClientId) $nvCollection.Add('grant',"basic") $nvCollection.Add('redirect_uri', $redirectUri) # a dummy url like apteco.de is needed If ( $Scope.length -gt 0 ) { $nvCollection.Add('scope', $Scope) # Set only the scope, if it is filled } If ( $State.length -gt 0 ) { $nvCollection.Add('state', $State) # Set only the state, if it is filled } # Create the url $uriRequest = [System.UriBuilder]$authUrl $uriRequest.Query = $nvCollection.ToString() # Remove callback file if it exists If ( Test-Path -Path $CallbackFile ) { "Removing callback file '$( $CallbackFile )'" Remove-Item $CallbackFile -Force } # Open the default browser with the generated url Write-Log -message "Opening the browser now to allow the access to the account" Write-Log -message "$( $uriRequest.Uri.OriginalString )" Write-Log -message "Please finish the process in your browser now" Write-Log -message "NOTE:" Write-Log -message " APTECO WILL NOT GET ACCESS TO YOUR DATA THROUGH THE APP!" Write-Log -message " ONLY THIS LOCAL GENERATED TOKEN CAN BE USED FOR ACCESS!" Start-Process $uriRequest.Uri.OriginalString # Wait Write-Log -message "Waiting for the callback file '$( $CallbackFile )'" Do { Write-Host "." -NoNewline Start-Sleep -Milliseconds 500 } Until ( Test-Path -Path $callbackFile ) Write-Log -message "Callback file found '$( $CallbackFile )'" # Read and parse callback file $callback = Get-Content -Path $callbackFile -Encoding utf8 $callbackUri = [uri]$callback $callbackUriSegments = [System.Web.HttpUtility]::ParseQueryString($callbackUri.Query) $code = $callbackUriSegments["code"] # Check the code If ( $code.Length -gt 0 ) { #Write-Host $code } else { throw "No usable code received" Exit 0 } # Check the state If ( $State.length -gt 0 ) { If ( $callbackUriSegments["state"] -ne $State ) { throw "State of initial call does not match the returned state! Exit!" Exit 0 } else { Write-Log "State was accepted!" } } #----------------------------------------------- # OAUTHv2 PROCESS - STEP 2 #----------------------------------------------- # Prepare the second call to exchange the code quickly for a token $postParams = [Hashtable]@{ Method = "Post" Uri = $tokenUrl Body = [Hashtable]@{ "client_id" = $ClientId "client_secret" = $ClientSecret "redirect_uri" = $redirectUri "grant_type" = "authorization_code" "code" = $code } Verbose = $true } $response = Invoke-RestMethod @postParams Write-Log -message "Got a token with scope '$( $response.scope )'" # Trying an API call <# try { $headers = @{ "Authorization" = "Bearer $( $response.access_token )" } $ttl = Invoke-RestMethod -Uri "https://rest.cleverreach.com/v3/debug/ttl.json" -Method Get -ContentType "application/json; charset=utf-8" -Headers $headers Write-Log -message "Used token for API call successfully. Token expires at '$( $ttl.date.toString() )'" } catch { Write-Log -message "API call was not successful. Aborting the whole script now!" -severity ( [Logseverity]::WARNING ) throw $_.Exception } #> # Clear the variables straight away #$clientCred = $null If ( $SaveExchangedPayload -eq $true ) { ConvertTo-Json -InputObject $response -Depth 99 | Set-Content -path ".\exchange.json" -Encoding UTF8 -Force } #----------------------------------------------- # SAVE THE TOKENS #----------------------------------------------- # TODO the saving could be put into a separate function # Encrypt tokens, if wished If ( $EncryptToken -eq $true) { $accessToken = Get-PlaintextToSecure $response.access_token If ( $null -ne $response.refresh_token ) { $refreshToken = Get-PlaintextToSecure $response.refresh_token } } else { $accessToken = $response.access_token If ( $null -ne $response.refresh_token ) { $refreshToken = $response.refresh_token } } # Parse the switch $separateTokenFile = $false If ( $SaveSeparateTokenFile -eq $true ) { $separateTokenFile = $true } # The settings to save for refreshing $set = @{ "accesstoken" = $accessToken "refreshtoken" = $refreshToken "tokenFile" = [IO.Path]::GetFullPath([IO.Path]::Combine((Get-Location -PSProvider "FileSystem").ProviderPath, $TokenFile)) "unixtime" = Get-Unixtime "saveSeparateTokenFile" = $separateTokenFile "payload" = $PayloadToSave #"refreshTokenAutomatically" = $true #"refreshTtl" = 604800 # seconds; refresh one week before expiration } # create json object $json = ConvertTo-Json -InputObject $set -Depth 99 # -compress # TODO implement PSNotify here for email notifications # rename settings file if it already exists If ( Test-Path -Path $SettingsFile ) { $backupPath = "$( $SettingsFile ).$( $timestamp.ToString("yyyyMMddHHmmss") )" Write-Log -message "Moving previous settings file to $( $backupPath )" -severity ( [Logseverity]::WARNING ) Move-Item -Path $SettingsFile -Destination $backupPath } else { Write-Log -message "There was no settings file existing yet" } # print settings to console #$json # save settings to file $json | Set-Content -path $SettingsFile -Encoding UTF8 #----------------------------------------------- # SAVE THE TOKENS AS SEPARATE FILE UNENCRYPTED #----------------------------------------------- If ( $SaveSeparateTokenFile -eq $true ) { Write-Log -message "Saving token to '$( $TokenFile )'" $response.access_token | Set-Content -path "$( $TokenFile )" -Encoding UTF8 -Force } } catch { Write-Log "ERROR: $( $_.Exception.Message )" -Severity ERROR throw $_.Exception } finally { #----------------------------------------------- # HOUSEKEEPING OF REGISTRY #----------------------------------------------- Write-Log -message "Removing temporary registry entries" # current path - will get back to this at the end $currentLocation = Get-Location # Switch to registry - choose the current user to not need admin rights $root = "Registry::HKEY_CURRENT_USER\Software\Classes" # User registry - needs no elevated rights # $root = "Registry::HKEY_CLASSES_ROOT" # Global registry - needs admin rights # Switch to root path of registry Set-Location -Path $root # Remove item now Remove-Item $Protocol -Recurse # Go back to original path Set-Location -path $currentLocation.Path #----------------------------------------------- # HOUSEKEEPING OF FILES #----------------------------------------------- Write-Log -message "Removing callback file now" # Remove callback file Remove-Item $CallbackFile -Force #----------------------------------------------- # LOG #----------------------------------------------- Write-Log -Severity INFO -Message "You can close your browser window now!" } } end { } } #----------------------------------------------- # TESTING HASHTABLES #----------------------------------------------- <# $leftHt = [hashtable]@{ "firstname" = "Florian" "lastname" = "Friedrichs" } $rightHt = [hashtable]@{ "lastname" = "von Bracht" "Street" = "Schaumainkai 87" } Join-Hashtable -Left $leftHt -right $rightHt -verbose -AddKeysFromRight #> |