Objective-C

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. Objective-C

#import <CkoStringBuilder.h>
#import <CkoPublicKey.h>
#import <CkoJsonObject.h>

BOOL success = NO;

//  Imagine we have this JWK:

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

CkoStringBuilder *sbJwk = [[CkoStringBuilder alloc] init];
success = [sbJwk LoadFile: @"qa_data/jwk/simple_jwk_rsa.json" charset: @"utf-8"];
if (success != YES) {
    NSLog(@"%@",@"Failed to load simple JWK file.");
    return;
}

//  Loading it into a Chilkat public key object is easy:
CkoPublicKey *pubkey = [[CkoPublicKey alloc] init];
success = [pubkey LoadFromString: [sbJwk GetAsString]];
if (success == NO) {
    NSLog(@"%@",pubkey.LastErrorText);
    return;
}

NSLog(@"%@",@"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"
//            }
//  }

CkoStringBuilder *sbJwk2 = [[CkoStringBuilder alloc] init];
success = [sbJwk2 LoadFile: @"qa_data/jwk/contained_jwk_rsa.json" charset: @"utf-8"];
if (success == NO) {
    NSLog(@"%@",sbJwk2.LastErrorText);
    return;
}

//  Get the "jwk" part of the JSON..
CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json Load: [sbJwk2 GetAsString]];

CkoJsonObject *jsonJwk = [[CkoJsonObject alloc] init];
success = [json ObjectOf2: @"jwk" jsonObj: jsonJwk];
if (success == NO) {
    NSLog(@"%@",json.LastErrorText);
    return;
}

CkoPublicKey *pubkey2 = [[CkoPublicKey alloc] init];
success = [pubkey2 LoadFromString: [jsonJwk Emit]];
if (success == NO) {
    NSLog(@"%@",pubkey2.LastErrorText);
    return;
}

NSLog(@"%@",@"Contained JWK loaded into public key object.");