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. C

#include <C_CkStringBuilder.h>
#include <C_CkPublicKey.h>
#include <C_CkJsonObject.h>

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

    success = FALSE;

    // 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 == FALSE) {
        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 == FALSE) {
        printf("%s\n",CkStringBuilder_lastErrorText(sbJwk2));
        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_Create();
    success = CkJsonObject_ObjectOf2(json,"jwk",jsonJwk);
    if (success == FALSE) {
        printf("%s\n",CkJsonObject_lastErrorText(json));
        CkStringBuilder_Dispose(sbJwk);
        CkPublicKey_Dispose(pubkey);
        CkStringBuilder_Dispose(sbJwk2);
        CkJsonObject_Dispose(json);
        CkJsonObject_Dispose(jsonJwk);
        return;
    }

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

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


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

    }