Node.js

Decode Microsoft Graph ID Token

See more Microsoft Graph Examples

Demonstrates how to decode a Microsoft Graph ID token. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    //  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"
    //  }

    var jsonToken = new chilkat.JsonObject();
    success = jsonToken.LoadFile("qa_data/tokens/microsoftGraph.json");
    if (success == false) {
        console.log("Failed to load the JSON file...");
        return;
    }

    //  Use Chilkat's JWT API to examine the id_token..
    var jwt = new chilkat.Jwt();
    var idToken = jsonToken.StringOf("id_token");

    //  Extract the JOSE header..
    var jose = jwt.GetHeader(idToken);

    var jsonHeader = new chilkat.JsonObject();
    jsonHeader.Load(jose);
    jsonHeader.EmitCompact = false;
    console.log(jsonHeader.Emit());

    //  The JOSE header looks like this:

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

    var claims = jwt.GetPayload(idToken);

    var jsonClaims = new chilkat.JsonObject();
    jsonClaims.Load(claims);
    jsonClaims.EmitCompact = false;
    console.log(jsonClaims.Emit());

    //  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..
    var ver = jsonClaims.StringOf("ver");
    var iss = jsonClaims.StringOf("iss");
    var s_sub = jsonClaims.StringOf("sub");
    var aud = jsonClaims.StringOf("aud");
    var exp = jsonClaims.IntOf("exp");
    var iat = jsonClaims.IntOf("iat");
    var nbf = jsonClaims.IntOf("nbf");
    var name = jsonClaims.StringOf("name");
    var preferred_username = jsonClaims.StringOf("preferred_username");
    var oid = jsonClaims.StringOf("oid");
    var tid = jsonClaims.StringOf("tid");
    var aio = jsonClaims.StringOf("aio");

}

chilkatExample();