(PowerShell) Get Google API Access Token using P12 Service Account Key

Demonstrates how to get a Google API access token using a P12 service account key.

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# First load the PKCS12 (.p12 / .pfx) into a PFX object.
$pfx = New-Object Chilkat.Pfx
$success = $pfx.LoadPfxFile("qa_data/googleSvcAccountKeys/ChilkatCloud-6ba1b17d6d16.p12","notasecret")
if ($success -ne $true) {
    $($pfx.LastErrorText)
    exit
}

$gAuth = New-Object Chilkat.AuthGoogle
$success = $gAuth.SetP12($pfx)

# Set the client email address.
$gAuth.EmailAddress = "pip-563@chilkatcloud.iam.gserviceaccount.com"

# Choose a scope.
$gAuth.Scope = "https://www.googleapis.com/auth/cloud-platform"

# Request an access token that is valid for this many seconds.
$gAuth.ExpireNumSeconds = 3600

# If the application is requesting delegated access:
# The email address of the user for which the application is requesting delegated access,
# then set the email address here. (Otherwise leave it empty.)
$gAuth.SubEmailAddress = ""

# Connect to www.googleapis.com using TLS (TLS 1.2 is the default.)
# The Chilkat socket object is used so that the connection can be established
# through proxies or an SSH tunnel if desired.
$tlsSock = New-Object Chilkat.Socket
$success = $tlsSock.Connect("www.googleapis.com",443,$true,5000)
if ($success -ne $true) {
    $($tlsSock.LastErrorText)
    exit
}

# Send the request to obtain the access token.
$success = $gAuth.ObtainAccessToken($tlsSock)
if ($success -ne $true) {
    $($gAuth.LastErrorText)
    exit
}

# Examine the access token:
$("Access Token: " + $gAuth.AccessToken)