Functions/Get-GraphSecurityAuthToken.ps1
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.Synopsis Gets a authenticaiton token to be used by other Microsoft Graph Security module cmdlets. .DESCRIPTION Get-GraphSecurityAuthToken gets an authentication token to be used by other Microsoft Graph Security module cmdlets. When using Get-GraphSecurityAuthToken you will be prompted to provide your Azure AD username (UPN), password and AppId. Get-GraphSecurityAuthToken takes the token and stores them in a special global session variable called $GraphSecurityAuthToken. All Microsoft Graph Security Module cmdlets reference that special global variable to pass requests to your tenant. .EXAMPLE Get-GraphSecurityAuthToken This prompts the user to enter both their username as well as their password, then prompts for AppId. Username = username (Example: Nicholas@contoso.com) Password = Password (Example: Sup3rS3cureP@ssw0rd!) Username = AppId Password = AppId (Example: 64407e7c-8522-417f-a003-f69ad0b1a89b) C:\>$GraphSecurityAuthToken To verify your auth token is set in the current session, run the above command. UserName Password -------- -------- nicholas@contoso.com System.Security.SecureString .FUNCTIONALITY Get-GraphSecurityAuthToken is intended to get an authentication token into a global session variable to allow other cmdlets to authenticate when passing requests. #> function Get-GraphSecurityAuthToken { [CmdletBinding()] Param ( # Specifies the password. [Parameter(Mandatory = $false)] [ValidateNotNullOrEmpty()] [System.Management.Automation.PSCredential]$GraphSecurityCredential ) Try { $Username = Select-GraphSecurityUsername } Catch { Throw $_ } Try { $AppId = Select-GraphSecurityAppId } Catch { Throw $_ } $user = New-Object "System.Net.Mail.MailAddress" -ArgumentList $Username $tenant = $user.Host Write-Verbose "Checking for AzureAD module..." $AadModule = Get-Module -Name "AzureAD" -ListAvailable if ($null -eq $AadModule) { Write-Verbose "AzureAD PowerShell module not found, looking for AzureADPreview" $AadModule = Get-Module -Name "AzureADPreview" -ListAvailable } if ($null -eq $AadModule) { Install-GraphSecurityAADModule $AadModule = Get-Module -Name "AzureAD" -ListAvailable } # Getting path to ActiveDirectory Assemblies # If the module count is greater than 1 find the latest version if ($AadModule.count -gt 1) { $Latest_Version = ($AadModule | Select-Object version | Sort-Object)[-1] $aadModule = $AadModule | Where-Object { $_.version -eq $Latest_Version.version } # Checking if there are multiple versions of the same module found if ($AadModule.count -gt 1) { $aadModule = $AadModule | Select-Object -Unique } $adal = Join-Path $AadModule.ModuleBase "Microsoft.IdentityModel.Clients.ActiveDirectory.dll" $adalforms = Join-Path $AadModule.ModuleBase "Microsoft.IdentityModel.Clients.ActiveDirectory.Platform.dll" } else { $adal = Join-Path $AadModule.ModuleBase "Microsoft.IdentityModel.Clients.ActiveDirectory.dll" $adalforms = Join-Path $AadModule.ModuleBase "Microsoft.IdentityModel.Clients.ActiveDirectory.Platform.dll" } [System.Reflection.Assembly]::LoadFrom($adal) | Out-Null [System.Reflection.Assembly]::LoadFrom($adalforms) | Out-Null $redirectUri = "urn:ietf:wg:oauth:2.0:oob" $resourceAppIdURI = "https://graph.microsoft.com" $authority = "https://login.microsoftonline.com/$Tenant" try { $authContext = New-Object "Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContext" -ArgumentList $authority # https://msdn.microsoft.com/en-us/library/azure/microsoft.identitymodel.clients.activedirectory.promptbehavior.aspx # Change the prompt behaviour to force credentials each time: Auto, Always, Never, RefreshSession $platformParameters = New-Object "Microsoft.IdentityModel.Clients.ActiveDirectory.PlatformParameters" -ArgumentList "Auto" $userId = New-Object "Microsoft.IdentityModel.Clients.ActiveDirectory.UserIdentifier" -ArgumentList ($Username, "OptionalDisplayableId") $authResult = $authContext.AcquireTokenAsync($resourceAppIdURI, $AppId, $redirectUri, $platformParameters, $userId).Result if ($authResult.AccessToken) { # Creating header for Authorization token $global:GraphSecurityAuthHeader = @{ 'Content-Type' = 'application/json' 'Authorization' = "Bearer " + $authResult.AccessToken 'ExpiresOn' = $authResult.ExpiresOn 'Prefer' = 'return=representation' } } else { Write-Warning "Authorization Access Token is null, please re-run authentication..." break } } catch { Write-Verbose $_.Exception.Message Write-Verbose $_.Exception.ItemName break } } |