(C) 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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#include <C_CkStringBuilder.h>
#include <C_CkPublicKey.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    HCkStringBuilder sbJwk;
    BOOL success;
    HCkPublicKey pubkey;
    HCkStringBuilder sbJwk2;
    HCkJsonObject json;
    HCkJsonObject jsonJwk;
    HCkPublicKey pubkey2;

    //  Imagine we have this JWK:

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

    sbJwk = CkStringBuilder_Create();
    success = CkStringBuilder_LoadFile(sbJwk,"qa_data/jwk/simple_jwk_rsa.json","utf-8");
    if (success != TRUE) {
        printf("Failed to load simple JWK file.\n");
        CkStringBuilder_Dispose(sbJwk);
        return;
    }

    //  Loading it into a Chilkat public key object is easy:
    pubkey = CkPublicKey_Create();
    success = CkPublicKey_LoadFromString(pubkey,CkStringBuilder_getAsString(sbJwk));
    if (success != TRUE) {
        printf("%s\n",CkPublicKey_lastErrorText(pubkey));
        CkStringBuilder_Dispose(sbJwk);
        CkPublicKey_Dispose(pubkey);
        return;
    }

    printf("Simple JWK loaded into public key object.\n");

    //  ----------------------------------------------------------------------------------------------------------
    //  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"
    //            }
    //  }

    sbJwk2 = CkStringBuilder_Create();
    success = CkStringBuilder_LoadFile(sbJwk2,"qa_data/jwk/contained_jwk_rsa.json","utf-8");
    if (success != TRUE) {
        printf("Failed to load JWK file.\n");
        CkStringBuilder_Dispose(sbJwk);
        CkPublicKey_Dispose(pubkey);
        CkStringBuilder_Dispose(sbJwk2);
        return;
    }

    //  Get the "jwk" part of the JSON..
    json = CkJsonObject_Create();
    CkJsonObject_Load(json,CkStringBuilder_getAsString(sbJwk2));

    jsonJwk = CkJsonObject_ObjectOf(json,"jwk");
    if (CkJsonObject_getLastMethodSuccess(json) != TRUE) {
        printf("No jwk member exists.\n");
        CkStringBuilder_Dispose(sbJwk);
        CkPublicKey_Dispose(pubkey);
        CkStringBuilder_Dispose(sbJwk2);
        CkJsonObject_Dispose(json);
        return;
    }

    pubkey2 = CkPublicKey_Create();
    success = CkPublicKey_LoadFromString(pubkey2,CkJsonObject_emit(jsonJwk));
    if (success != TRUE) {
        printf("%s\n",CkPublicKey_lastErrorText(pubkey2));
        CkStringBuilder_Dispose(sbJwk);
        CkPublicKey_Dispose(pubkey);
        CkStringBuilder_Dispose(sbJwk2);
        CkJsonObject_Dispose(json);
        CkPublicKey_Dispose(pubkey2);
        return;
    }

    printf("Contained JWK loaded into public key object.\n");

    CkJsonObject_Dispose(jsonJwk);


    CkStringBuilder_Dispose(sbJwk);
    CkPublicKey_Dispose(pubkey);
    CkStringBuilder_Dispose(sbJwk2);
    CkJsonObject_Dispose(json);
    CkPublicKey_Dispose(pubkey2);

    }