Java

Decode Microsoft Graph ID Token

See more Microsoft Graph Examples

Demonstrates how to decode a Microsoft Graph ID token. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.Jwt;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        // This example loads an id_token and decodes it.

        // 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"
        // }

        JsonObject jsonToken = new JsonObject();
        try {
            jsonToken.loadFile("qa_data/tokens/microsoftGraph.json");
        } catch (ChilkatException e) {
            System.out.println("Failed to load the JSON file...");
            return;
        }

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

        // Extract the JOSE header..
        String jose = jwt.getHeader(idToken);

        JsonObject jsonHeader = new JsonObject();
        jsonHeader.load(jose);
        jsonHeader.setEmitCompact(false);
        System.out.println(jsonHeader.emit());

        // The JOSE header looks like this:

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

        String claims = jwt.getPayload(idToken);

        JsonObject jsonClaims = new JsonObject();
        jsonClaims.load(claims);
        jsonClaims.setEmitCompact(false);
        System.out.println(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..
        String ver = jsonClaims.stringOf("ver");
        String iss = jsonClaims.stringOf("iss");
        String s_sub = jsonClaims.stringOf("sub");
        String aud = jsonClaims.stringOf("aud");
        int exp = jsonClaims.intOf("exp");
        int iat = jsonClaims.intOf("iat");
        int nbf = jsonClaims.intOf("nbf");
        String name = jsonClaims.stringOf("name");
        String preferred_username = jsonClaims.stringOf("preferred_username");
        String oid = jsonClaims.stringOf("oid");
        String tid = jsonClaims.stringOf("tid");
        String aio = jsonClaims.stringOf("aio");
    }
}