(C) bitzlato.com whoami

Demonstrates sending a request to the bitzlato.com whoami endpoint using an ES256 JWT token for authentication.

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#include <C_CkJsonObject.h>
#include <C_CkPrivateKey.h>
#include <C_CkJwt.h>
#include <C_CkHttp.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkJsonObject jwk;
    HCkPrivateKey eccKey;
    HCkJwt jwt;
    HCkJsonObject jose;
    HCkJsonObject claims;
    int curDateTime;
    const char *jwt_token;
    HCkHttp http;
    const char *responseStr;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    //  Use the following ECC key loaded from JWK format.
    jwk = CkJsonObject_Create();
    success = CkJsonObject_UpdateString(jwk,"kty","EC");
    success = CkJsonObject_UpdateString(jwk,"crv","P-256");
    success = CkJsonObject_UpdateString(jwk,"x","...");
    success = CkJsonObject_UpdateString(jwk,"y","...");
    success = CkJsonObject_UpdateString(jwk,"d","...");

    eccKey = CkPrivateKey_Create();
    success = CkPrivateKey_LoadJwk(eccKey,CkJsonObject_emit(jwk));
    if (success == FALSE) {
        printf("%s\n",CkPrivateKey_lastErrorText(eccKey));
        CkJsonObject_Dispose(jwk);
        CkPrivateKey_Dispose(eccKey);
        return;
    }

    jwt = CkJwt_Create();

    // Build the JOSE header
    jose = CkJsonObject_Create();
    success = CkJsonObject_AppendString(jose,"format","compact");
    success = CkJsonObject_AppendString(jose,"alg","ES256");

    // Now build the JWT claims (also known as the payload)

    // Our JWT claims will contain members as shown here:

    // 	{
    // 	  "email":"your_email@example.com",
    // 	  "aud":"usr",
    // 	  "iat":"1588286154",
    // 	  "jti":"555D9123"
    // 	}

    claims = CkJsonObject_Create();
    CkJsonObject_AppendString(claims,"jti","555D9123");
    CkJsonObject_AppendString(claims,"email","your_email@example.com");

    // Set the timestamp of when the JWT was created to now minus 60 seconds
    curDateTime = CkJwt_GenNumericDate(jwt,-60);
    success = CkJsonObject_AddIntAt(claims,-1,"iat",curDateTime);

    // Set the "not process before" timestamp to now minus 60 seconds
    success = CkJsonObject_AddIntAt(claims,-1,"nbf",curDateTime);

    // Set the timestamp defining an expiration time (end time) for the token
    // to be now + 1 hour (3600 seconds)
    success = CkJsonObject_AddIntAt(claims,-1,"exp",curDateTime + 3600);

    CkJsonObject_AppendString(claims,"aud","usr");

    // Produce the smallest possible JWT:
    CkJwt_putAutoCompact(jwt,TRUE);

    // Create the JWT token.  This is where the RSA signature is created.
    jwt_token = CkJwt_createJwtPk(jwt,CkJsonObject_emit(jose),CkJsonObject_emit(claims),eccKey);

    printf("%s\n",jwt_token);

    // Send the HTTPS GET with the jwt_token used for Authorization.
    http = CkHttp_Create();
    CkHttp_putAuthToken(http,jwt_token);
    responseStr = CkHttp_quickGetStr(http,"https://bitzlato.com/api/auth/whoami");
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkJsonObject_Dispose(jwk);
        CkPrivateKey_Dispose(eccKey);
        CkJwt_Dispose(jwt);
        CkJsonObject_Dispose(jose);
        CkJsonObject_Dispose(claims);
        CkHttp_Dispose(http);
        return;
    }

    printf("status code = %d\n",CkHttp_getLastStatus(http));
    printf("%s\n",responseStr);


    CkJsonObject_Dispose(jwk);
    CkPrivateKey_Dispose(eccKey);
    CkJwt_Dispose(jwt);
    CkJsonObject_Dispose(jose);
    CkJsonObject_Dispose(claims);
    CkHttp_Dispose(http);

    }