(PHP ActiveX) Decode Microsoft Graph ID Token

Demonstrates how to decode a Microsoft Graph ID token.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

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

// In a previous example, we obtained a Microsoft Graph OAuth2 access token.
// This example loads the JSON saved from the previous example and decodes the id_token.

// Our Microsoft Graph OAuth2 token looks like this:

// {
//   "token_type": "Bearer",
//   "scope": "openid profile User.ReadWrite Mail.ReadWrite Mail.Send Files.ReadWrite User.Read Calendars.ReadWrite Group.ReadWrite.All",
//   "expires_in": 3600,
//   "ext_expires_in": 3600,
//   "access_token": "EwCQA8l6...0HhMKYwC",
//   "refresh_token": "MCWulIvzi2yD0S...igEFn51mqcByhZtAJg",
//   "id_token": "eyJ0eXAiOiJKV1...Q7lRDaR-7A",
//   "expires_on": "1562862714"
// }

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$jsonToken = new COM("Chilkat.JsonObject");
$success = $jsonToken->LoadFile('qa_data/tokens/microsoftGraph.json');
if ($success == 0) {
    print 'Failed to load the JSON file...' . "\n";
    exit;
}

// Use Chilkat's JWT API to examine the id_token..
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Jwt')
$jwt = new COM("Chilkat.Jwt");
$idToken = $jsonToken->stringOf('id_token');

// Extract the JOSE header..
$jose = $jwt->getHeader($idToken);

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$jsonHeader = new COM("Chilkat.JsonObject");
$jsonHeader->Load($jose);
$jsonHeader->EmitCompact = 0;
print $jsonHeader->emit() . "\n";

// The JOSE header looks like this:

// {
//   "typ": "JWT",
//   "alg": "RS256",
//   "kid": "1LTMzakihiRla_8z2BEJVXeWMqo"
// }

$claims = $jwt->getPayload($idToken);

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$jsonClaims = new COM("Chilkat.JsonObject");
$jsonClaims->Load($claims);
$jsonClaims->EmitCompact = 0;
print $jsonClaims->emit() . "\n";

// The claims look like this:

// {
//   "ver": "2.0",
//   "iss": "https://login.microsoftonline.com/9188040d-6c67-4c5b-b112-36a304b66dad/v2.0",
//   "sub": "AAAAAAAAAAAAAAAAAAAAAHJFryd6Gydo-XtTd1nhUNQ",
//   "aud": "18c456bd-db75-43fe-9724-9e5d821c68ff",
//   "exp": 1562945513,
//   "iat": 1562858813,
//   "nbf": 1562858813,
//   "name": "Matt Chilkat",
//   "preferred_username": "matt@example.com",
//   "oid": "00000000-0000-0000-3a33-fceb9b74cc15",
//   "tid": "9188040d-6c67-4c5b-b112-36a304b66dad",
//   "aio": "DfibJqKnWC1c0FS6G ... W6pvTrQuYzyq16ghY$"
// }
// 

// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

// Get each of the claims..
$ver = $jsonClaims->stringOf('ver');
$iss = $jsonClaims->stringOf('iss');
$s_sub = $jsonClaims->stringOf('sub');
$aud = $jsonClaims->stringOf('aud');
$exp = $jsonClaims->IntOf('exp');
$iat = $jsonClaims->IntOf('iat');
$nbf = $jsonClaims->IntOf('nbf');
$name = $jsonClaims->stringOf('name');
$preferred_username = $jsonClaims->stringOf('preferred_username');
$oid = $jsonClaims->stringOf('oid');
$tid = $jsonClaims->stringOf('tid');
$aio = $jsonClaims->stringOf('aio');

?>