PHP

Get Google API Access Token using P12 Service Account Key

See more Google APIs Examples

Demonstrates how to get a Google API access token using a P12 service account key. Chilkat2 PHP

<?php

use Chilkat2\AuthGoogle;
use Chilkat2\Pfx;
use Chilkat2\Socket;

// 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.
$pfx = new Pfx();
try {
    $pfx->LoadPfxFile('qa_data/pfx/chilkat25-cbd7b42afbd8.p12', 'notasecret');

    $gAuth = new AuthGoogle();
    $gAuth->SetP12($pfx);

    // The ISS is your service account email address ending in gserviceaccount.com.
    $iss = 'chilkatsvc@chilkat25.iam.gserviceaccount.com';

    // The scope is always the following string:
    $scope = 'https://mail.google.com/';

    // The sub is your company email address
    $oauth_sub = 'info@chilkat.xyz';

    // The access token is valid for this number of seconds.
    $numSec = 3600;

    $gAuth->EmailAddress = $iss;
    $gAuth->Scope = $scope;
    $gAuth->ExpireNumSeconds = $numSec;
    $gAuth->SubEmailAddress = $oauth_sub;

    // Connect to www.googleapis.com
    $tlsSock = new Socket();
    $tlsSock->Connect('www.googleapis.com', 443, true, 5000);

    // Send the request to obtain the access token.
    $gAuth->ObtainAccessToken($tlsSock);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

// Examine the access token:
echo 'Access Token: ', $gAuth->AccessToken, "\n";