Xojo Plugin

Get Google API Access Token using P12 Service Account Key

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

Dim success As Boolean
success = False

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

// --------------------------------------------------------------------------------
// For a step-by-step guide for setting up your Google Workspace service account,
// see Setup Google Workspace Account for Sending SMTP GMail from a Service Account
// --------------------------------------------------------------------------------

// First load the PKCS12 (.p12 / .pfx) into a PFX object.
Dim pfx As New Chilkat.Pfx
success = pfx.LoadPfxFile("qa_data/pfx/chilkat25-cbd7b42afbd8.p12","notasecret")
If (success <> True) Then
    System.DebugLog(pfx.LastErrorText)
    Return
End If

Dim gAuth As New Chilkat.AuthGoogle
success = gAuth.SetP12(pfx)

// The ISS is your service account email address ending in gserviceaccount.com.
Dim iss As String
iss = "chilkatsvc@chilkat25.iam.gserviceaccount.com"

// The scope is always the following string:
Dim scope As String
scope = "https://mail.google.com/"

// The sub is your company email address
Dim oauth_sub As String
oauth_sub = "info@chilkat.xyz"

// The access token is valid for this number of seconds.
Dim numSec As Int32
numSec = 3600

gAuth.EmailAddress = iss
gAuth.Scope = scope
gAuth.ExpireNumSeconds = numSec
gAuth.SubEmailAddress = oauth_sub

// Connect to www.googleapis.com
Dim tlsSock As New Chilkat.Socket
success = tlsSock.Connect("www.googleapis.com",443,True,5000)
If (success <> True) Then
    System.DebugLog(tlsSock.LastErrorText)
    Return
End If

// Send the request to obtain the access token.
success = gAuth.ObtainAccessToken(tlsSock)
If (success <> True) Then
    System.DebugLog(gAuth.LastErrorText)
    Return
End If

// Examine the access token:
System.DebugLog("Access Token: " + gAuth.AccessToken)