Java Requires Chilkat v11.0.0+

Load JWK into PublicKey Object

See more JSON Web Signatures (JWS) Examples

Demonstrates how to load a Java Web Key (JWK) into a Chilkat public key object. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.PublicKey;
import com.chilkatsoft.chilkat2.StringBuilder;

public class ChilkatExample {

    public static void main(String[] args) {
        // Imagine we have this JWK:

        // {
        // "kty":"RSA",
        // "kid":"bilbo.baggins@hobbiton.example",
        // "use":"sig",
        // "n":"26381066103266289976070039679240841999340706859156341823971393693544846472963839705790075117105560154606562987481050889935247188300178764426769543782451174831475924241862817098997865881169498995546309260357488285676768114714548754913374731868063116787903918383610614912211576698081222844057810710088656983077876282582286966085572172471849443305250452393766960762340311496052418952315081937000716222751229644449475751932222180738210988190709824209639002026650048655399108647971010890335494074025258268035713167380057822555485524738518699437692145859633592396626258745090144803752145540471688039673495588314804430463791",
        // "e":"65537"
        // }
        //

        StringBuilder sbJwk = new StringBuilder();
        try {
            sbJwk.loadFile("qa_data/jwk/simple_jwk_rsa.json", "utf-8");
        } catch (ChilkatException e) {
            System.out.println("Failed to load simple JWK file.");
            return;
        }

        // Loading it into a Chilkat public key object is easy:
        PublicKey pubkey = new PublicKey();
        try {
            pubkey.loadFromString(sbJwk.getAsString());
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Simple JWK loaded into public key object.");

        // ----------------------------------------------------------------------------------------------------------
        // Demonstrate how to load a JWK that is contained within JSON into a public key object.

        // {
        //   "alg":"RS256",
        //   "jwk":  {
        //           "kty":"RSA",
        //           "kid":"bilbo.baggins@hobbiton.example",
        //           "use":"sig",
        //           "n":"26381066103266289976070039679240841999340706859156341823971393693544846472963839705790075117105560154606562987481050889935247188300178764426769543782451174831475924241862817098997865881169498995546309260357488285676768114714548754913374731868063116787903918383610614912211576698081222844057810710088656983077876282582286966085572172471849443305250452393766960762340311496052418952315081937000716222751229644449475751932222180738210988190709824209639002026650048655399108647971010890335494074025258268035713167380057822555485524738518699437692145859633592396626258745090144803752145540471688039673495588314804430463791",
        //           "e":"65537"
        //           }
        // }

        StringBuilder sbJwk2 = new StringBuilder();
        try {
            sbJwk2.loadFile("qa_data/jwk/contained_jwk_rsa.json", "utf-8");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Get the "jwk" part of the JSON..
        JsonObject json = new JsonObject();
        json.load(sbJwk2.getAsString());

        JsonObject jsonJwk = new JsonObject();
        try {
            json.objectOf2("jwk", jsonJwk);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        PublicKey pubkey2 = new PublicKey();
        try {
            pubkey2.loadFromString(jsonJwk.emit());
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Contained JWK loaded into public key object.");
    }
}