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PowerShell function Get-AADToken - works for both UPN and SPN
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Function Get-AADToken { | |
[CmdletBinding()] | |
[OutputType([string])] | |
PARAM ( | |
[Parameter(Position=0,Mandatory=$true)] | |
[ValidateScript({ | |
try | |
{ | |
[System.Guid]::Parse($_) | Out-Null | |
$true | |
} | |
catch | |
{ | |
$false | |
} | |
})] | |
[Alias('tID')] | |
[String]$TenantID, | |
[Parameter(Position=1,Mandatory=$true)][Alias('cred')] | |
[pscredential] | |
[System.Management.Automation.CredentialAttribute()] | |
$Credential, | |
[Parameter(Position=0,Mandatory=$false)][Alias('type')] | |
[ValidateSet('UserPrincipal', 'ServicePrincipal')] | |
[String]$AuthenticationType = 'UserPrincipal' | |
) | |
Try | |
{ | |
$Username = $Credential.Username | |
$Password = $Credential.Password | |
If ($AuthenticationType -ieq 'UserPrincipal') | |
{ | |
# Set well-known client ID for Azure PowerShell | |
$clientId = '1950a258-227b-4e31-a9cf-717495945fc2' | |
# Set Resource URI to Azure Service Management API | |
$resourceAppIdURI = 'https://management.azure.com/' | |
# Set Authority to Azure AD Tenant | |
$authority = 'https://login.microsoftonline.com/common/' + $TenantID | |
Write-Verbose "Authority: $authority" | |
$AADcredential = [Microsoft.IdentityModel.Clients.ActiveDirectory.UserCredential]::new($UserName, $Password) | |
$authContext = [Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContext]::new($authority) | |
$authResult = $authContext.AcquireTokenAsync($resourceAppIdURI,$clientId,$AADcredential) | |
$Token = $authResult.Result.CreateAuthorizationHeader() | |
} else { | |
# Set Resource URI to Azure Service Management API | |
$resourceAppIdURI = 'https://management.core.windows.net/' | |
# Set Authority to Azure AD Tenant | |
$authority = 'https://login.windows.net/' + $TenantId | |
$ClientCred = [Microsoft.IdentityModel.Clients.ActiveDirectory.ClientCredential]::new($UserName, $Password) | |
$authContext = [Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContext]::new($authority) | |
$authResult = $authContext.AcquireTokenAsync($resourceAppIdURI,$ClientCred) | |
$Token = $authResult.Result.CreateAuthorizationHeader() | |
} | |
} | |
Catch | |
{ | |
Throw $_ | |
$ErrorMessage = 'Failed to aquire Azure AD token.' | |
Write-Error -Message 'Failed to aquire Azure AD token' | |
} | |
$Token | |
} |
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