PSIntuneAuth.psm1
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function Get-MSIntuneAuthToken { <# .SYNOPSIS Get an authentication token required for interacting with Microsoft Intune using Microsoft Graph API NOTE: This function requires that AzureAD module is installed. Use 'Install-Module -Name AzureAD' to install it. .PARAMETER TenantName A tenant name should be provided in the following format: tenantname.onmicrosoft.com. .PARAMETER ClientID Application ID for an Azure AD application. .PARAMETER Credential Specify a PSCredential object containing username and password. .PARAMETER RedirectUri Redirect URI for Azure AD application. Leave empty to leverage Azure PowerShell well known redirect URI. .PARAMETER PromptBehavior Set the prompt behavior when acquiring a token. .EXAMPLE # Manually specify username and password to acquire an authentication token: Get-MSGraphAuthenticationToken -TenantName domain.onmicrsoft.com -ClientID "<GUID>" # Retrieve a PSCredential object with username and password to acquire an authentication token: $Credential = Get-Credential Get-MSGraphAuthenticationToken -TenantName domain.onmicrsoft.com -ClientID "<GUID>" -Credential $Credential # Retrieve a PSCredential object for usage with Azure Automation containing the username and password to acquire an authentication token: $Credential = Get-AutomationPSCredential -Name "<CredentialName>" Get-MSGraphAuthenticationToken -TenantName domain.onmicrsoft.com -ClientID "<GUID>" -Credential $Credential .NOTES Author: Nickolaj Andersen Contact: @NickolajA Created: 2017-09-27 Updated: 2018-01-22 Version history: 1.0.0 - (2017-09-27) Script created 1.0.1 - (2017-09-28) N/A - module manifest update 1.0.2 - (2017-10-08) Added ExpiresOn property 1.0.3 - (2018-01-22) Added support for specifying PSCredential object for silently retrieving an authentication token without being prompted 1.0.4 - (2018-01-22) Fixed an issue with prompt behavior parameter not being used 1.0.5 - (2018-01-22) Fixed an issue when detecting the AzureAD module presence #> [CmdletBinding()] param( [parameter(Mandatory=$true, ParameterSetName="AuthPrompt", HelpMessage="A tenant name should be provided in the following format: tenantname.onmicrosoft.com.")] [parameter(Mandatory=$true, ParameterSetName="AuthCredential")] [ValidateNotNullOrEmpty()] [string]$TenantName, [parameter(Mandatory=$true, ParameterSetName="AuthPrompt", HelpMessage="Application ID for an Azure AD application.")] [parameter(Mandatory=$true, ParameterSetName="AuthCredential")] [ValidateNotNullOrEmpty()] [string]$ClientID, [parameter(Mandatory=$true, ParameterSetName="AuthCredential", HelpMessage="Specify a PSCredential object containing username and password.")] [ValidateNotNullOrEmpty()] [PSCredential]$Credential, [parameter(Mandatory=$false, ParameterSetName="AuthPrompt", HelpMessage="Redirect URI for Azure AD application. Leave empty to leverage Azure PowerShell well known redirect URI.")] [parameter(Mandatory=$false, ParameterSetName="AuthCredential")] [ValidateNotNullOrEmpty()] [string]$RedirectUri = "urn:ietf:wg:oauth:2.0:oob", [parameter(Mandatory=$false, ParameterSetName="AuthPrompt", HelpMessage="Set the prompt behavior when acquiring a token.")] [parameter(Mandatory=$false, ParameterSetName="AuthCredential")] [ValidateNotNullOrEmpty()] [ValidateSet("Auto", "Always", "Never", "RefreshSession")] [string]$PromptBehavior = "Auto" ) try { # Get installed Azure AD modules $AzureADModules = Get-Module -Name "AzureAD" -ListAvailable -ErrorAction Stop -Verbose:$false if ($AzureADModules -ne $null) { # Check if multiple modules exist and determine the module path for the most current version if (($AzureADModules | Measure-Object).Count -gt 1) { $LatestAzureADModule = ($AzureADModules | Select-Object -Property Version | Sort-Object)[-1] $AzureADModulePath = $AzureADModules | Where-Object { $_.Version -like $LatestAzureADModule.Version } | Select-Object -ExpandProperty ModuleBase } else { $AzureADModulePath = Get-InstalledModule -Name "AzureAD" | Select-Object -ExpandProperty InstalledLocation } # Construct array for required assemblies from Azure AD module $Assemblies = @( (Join-Path -Path $AzureADModulePath -ChildPath "Microsoft.IdentityModel.Clients.ActiveDirectory.dll"), (Join-Path -Path $AzureADModulePath -ChildPath "Microsoft.IdentityModel.Clients.ActiveDirectory.Platform.dll") ) Add-Type -Path $Assemblies -ErrorAction Stop try { $Authority = "https://login.microsoftonline.com/$($TenantName)/oauth2/token" $ResourceRecipient = "https://graph.microsoft.com" # Construct new authentication context $AuthenticationContext = New-Object -TypeName "Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContext" -ArgumentList $Authority -ErrorAction Stop # Construct platform parameters $PlatformParams = New-Object -TypeName "Microsoft.IdentityModel.Clients.ActiveDirectory.PlatformParameters" -ArgumentList $PromptBehavior -ErrorAction Stop # Determine parameters when acquiring token switch ($PSCmdlet.ParameterSetName) { "AuthPrompt" { # Acquire access token $AuthenticationResult = ($AuthenticationContext.AcquireTokenAsync($ResourceRecipient, $ClientID, $RedirectUri, $PlatformParams)).Result } "AuthCredential" { # Construct required identity model credential $UserPasswordCredential = New-Object -TypeName "Microsoft.IdentityModel.Clients.ActiveDirectory.UserPasswordCredential" -ArgumentList ($Credential.UserName, $Credential.Password) -ErrorAction Stop # Acquire access token $AuthenticationResult = ([Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContextIntegratedAuthExtensions]::AcquireTokenAsync($AuthenticationContext, $ResourceRecipient, $ClientID, $UserPasswordCredential)).Result } } # Check if access token was acquired if ($AuthenticationResult.AccessToken -ne $null) { # Construct authentication hash table for holding access token and header information $Authentication = @{ "Content-Type" = "application/json" "Authorization" = -join("Bearer ", $AuthenticationResult.AccessToken) "ExpiresOn" = $AuthenticationResult.ExpiresOn } # Return the authentication token return $Authentication } else { Write-Warning -Message "Failure to acquire access token. Response with access token was null" ; break } } catch [System.Exception] { Write-Warning -Message "An error occurred when constructing an authentication token: $($_.Exception.Message)" ; break } } else { Write-Warning -Message "Azure AD PowerShell module is not present on this system, please install before you continue" ; break } } catch [System.Exception] { Write-Warning -Message "Unable to load required assemblies (Azure AD PowerShell module) to construct an authentication token. Error: $($_.Exception.Message)" ; break } } |