(Swift) Load JWK into PublicKey Object

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

Note: This example requires Chilkat v9.5.0.66 or greater.

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func chilkatTest() {
    //  Imagine we have this JWK:

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

    let sbJwk = CkoStringBuilder()
    var success: Bool = sbJwk.LoadFile("qa_data/jwk/simple_jwk_rsa.json", charset: "utf-8")
    if success != true {
        print("Failed to load simple JWK file.")
        return
    }

    //  Loading it into a Chilkat public key object is easy:
    let pubkey = CkoPublicKey()
    success = pubkey.LoadFromString(sbJwk.GetAsString())
    if success != true {
        print("\(pubkey.LastErrorText)")
        return
    }

    print("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"
    //            }
    //  }

    let sbJwk2 = CkoStringBuilder()
    success = sbJwk2.LoadFile("qa_data/jwk/contained_jwk_rsa.json", charset: "utf-8")
    if success != true {
        print("Failed to load JWK file.")
        return
    }

    //  Get the "jwk" part of the JSON..
    let json = CkoJsonObject()
    json.Load(sbJwk2.GetAsString())

    var jsonJwk: CkoJsonObject? = json.ObjectOf("jwk")
    if json.LastMethodSuccess != true {
        print("No jwk member exists.")
        return
    }

    let pubkey2 = CkoPublicKey()
    success = pubkey2.LoadFromString(jsonJwk!.Emit())
    if success != true {
        print("\(pubkey2.LastErrorText)")
        return
    }

    print("Contained JWK loaded into public key object.")

    jsonJwk = nil

}