(C++) Calculate a X_RISKIFIED_HMAC_SHA256 for riskified.com API Calls

Demonstrates how to calculate the value for the X_RISKIFIED_HMAC_SHA256 header for riskified.com HTTP requests (REST API calls).

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#include <CkJsonObject.h>
#include <CkCrypt2.h>
#include <CkStringBuilder.h>

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

    // Create the JSON that is to be the body of the HTTP request.
    // The JSON created by this code is shown at the bottom of this example.
    // 
    // The JSON Code Generator at http://tools.chilkat.io/ can be used
    // to generate the following code from sample JSON.

    CkJsonObject json;
    json.UpdateNull("order.cancel_reason");
    json.UpdateNull("order.cancelled_at");
    json.UpdateString("order.cart_token","68778783ad298f1c80c3bafcddeea02f");
    json.UpdateNull("order.closed_at");
    json.UpdateString("order.created_at","2008-01-10T11:00:00-05:00");
    json.UpdateString("order.currency","USD");
    json.UpdateString("order.email","bob.norman@hostmail.com");
    json.UpdateString("order.gateway","authorize_net");
    json.UpdateNumber("order.id","450789469");
    json.UpdateString("order.total_discounts","0.00");
    json.UpdateString("order.total_price","409.94");
    json.UpdateString("order.updated_at","2008-01-10T11:00:00-05:00");
    json.UpdateString("order.note","some note made by the shop’s stuff member");
    json.UpdateNull("order.browser_ip");
    json.UpdateString("order.discount_codes[0].amount","10.00");
    json.UpdateString("order.discount_codes[0].code","TENOFF");
    json.UpdateString("order.line_items[0].title","IPod Nano - 8gb - green");
    json.UpdateNumber("order.line_items[0].price","199.00");
    json.UpdateNumber("order.line_items[0].product_id","632910392");
    json.UpdateNumber("order.line_items[0].quantity","1");
    json.UpdateString("order.line_items[0].sku","IPOD2008GREEN");
    json.UpdateString("order.shipping_lines[0].code","Free Shipping");
    json.UpdateString("order.shipping_lines[0].price","0.00");
    json.UpdateString("order.shipping_lines[0].title","Free Shipping");
    json.UpdateNull("order.payment_details.avs_result_code");
    json.UpdateNull("order.payment_details.credit_card_bin");
    json.UpdateString("order.payment_details.credit_card_company","Visa");
    json.UpdateString("order.payment_details.credit_card_number","XXXX-XXXX-XXXX-4242");
    json.UpdateNull("order.payment_details.cvv_result_code");
    json.UpdateString("order.payment_details.authorization_id","RK346IK124");
    json.UpdateString("order.billing_address.address1","Chestnut Street 92");
    json.UpdateString("order.billing_address.address2","");
    json.UpdateString("order.billing_address.city","Louisville");
    json.UpdateNull("order.billing_address.company");
    json.UpdateString("order.billing_address.country","United States");
    json.UpdateString("order.billing_address.country_code","US");
    json.UpdateString("order.billing_address.first_name","Bob");
    json.UpdateString("order.billing_address.last_name","Norman");
    json.UpdateString("order.billing_address.name","Bob Norman");
    json.UpdateString("order.billing_address.phone","555-625-1199");
    json.UpdateString("order.billing_address.province","Kentucky");
    json.UpdateString("order.billing_address.province_code","KY");
    json.UpdateString("order.billing_address.zip","40202");
    json.UpdateString("order.shipping_address.address1","Chestnut Street 92");
    json.UpdateString("order.shipping_address.address2","");
    json.UpdateString("order.shipping_address.city","Louisville");
    json.UpdateNull("order.shipping_address.company");
    json.UpdateString("order.shipping_address.country","United States");
    json.UpdateString("order.shipping_address.country_code","US");
    json.UpdateString("order.shipping_address.first_name","Bob");
    json.UpdateString("order.shipping_address.last_name","Norman");
    json.UpdateString("order.shipping_address.name","Bob Norman");
    json.UpdateString("order.shipping_address.phone","555-625-1199");
    json.UpdateString("order.shipping_address.province","Kentucky");
    json.UpdateString("order.shipping_address.province_code","KY");
    json.UpdateString("order.shipping_address.zip","40202");
    json.UpdateString("order.customer.created_at","2013-04-23T13:36:50-04:00");
    json.UpdateString("order.customer.email","bob.norman@hostmail.com");
    json.UpdateString("order.customer.first_name","Bob");
    json.UpdateNumber("order.customer.id","207119551");
    json.UpdateString("order.customer.last_name","Norman");
    json.UpdateNull("order.customer.note");
    json.UpdateNumber("order.customer.orders_count","0");
    json.UpdateBool("order.customer.verified_email",true);

    // Emit the JSON in compact format..
    json.put_EmitCompact(true);
    // Get the JSON that will be HMAC'd and will also be the contents of the HTTP request body.
    const char *jsonBody = json.emit();

    CkCrypt2 crypt;
    crypt.put_EncodingMode("hex");
    crypt.put_HashAlgorithm("sha256");
    crypt.put_MacAlgorithm("hmac");

    crypt.SetMacKeyString("55fe0f4d4023bbdfbc124cabd88bf9bb");

    const char *hmacHexStr = crypt.macStringENC(jsonBody);
    if (crypt.get_LastMethodSuccess() != true) {
        std::cout << crypt.lastErrorText() << "\r\n";
        return;
    }

    // We need a lowercase hmacHexStr...
    CkStringBuilder sbHmacHex;
    sbHmacHex.Append(hmacHexStr);
    sbHmacHex.ToLowercase();

    hmacHexStr = sbHmacHex.getAsString();

    std::cout << "The value of the X_RISKIFIED_HMAC_SHA256 should be: " << hmacHexStr << "\r\n";

    // This example is only to show the HMAC SHA256 calculation.
    // See examples of sending REST requests to riskified.com at http://rest-examples.chilkat.io/riskified/default.cshtml

    // ----------------------------------------------
    // This is the JSON created by the above code..

    // {
    //   "order": {
    //     "cancel_reason": null,
    //     "cancelled_at": null,
    //     "cart_token": "68778783ad298f1c80c3bafcddeea02f",
    //     "closed_at": null,
    //     "created_at": "2008-01-10T11:00:00-05:00",
    //     "currency": "USD",
    //     "email": "bob.norman@hostmail.com",
    //     "gateway": "authorize_net",
    //     "id": 450789469,
    //     "total_discounts": "0.00",
    //     "total_price": "409.94",
    //     "updated_at": "2008-01-10T11:00:00-05:00",
    //     "note": "some note made by the shop’s stuff member",
    //     "browser_ip": null,
    //     "discount_codes": [
    //         {
    //             "amount": "10.00",
    //             "code": "TENOFF"
    //         }
    //     ],
    //     "line_items": [
    //         {
    //             "title": "IPod Nano - 8gb - green",
    //             "price": 199.00,
    //             "product_id": 632910392,
    //             "quantity": 1,
    //             "sku": "IPOD2008GREEN"
    //         }
    //     ],
    //     "shipping_lines": [
    //         {
    //             "code": "Free Shipping",
    //             "price": "0.00",
    //             "title": "Free Shipping"
    //         }
    //     ],
    //     "payment_details": {
    //         "avs_result_code": null,
    //         "credit_card_bin": null,
    //         "credit_card_company": "Visa",
    //         "credit_card_number": "XXXX-XXXX-XXXX-4242",
    //         "cvv_result_code": null,
    //         "authorization_id": "RK346IK124"
    //     },
    //     "billing_address": {
    //         "address1": "Chestnut Street 92",
    //         "address2": "",
    //         "city": "Louisville",
    //         "company": null,
    //         "country": "United States",
    //         "country_code": "US",
    //         "first_name": "Bob",
    //         "last_name": "Norman",
    //         "name": "Bob Norman",
    //         "phone": "555-625-1199",
    //         "province": "Kentucky",
    //         "province_code": "KY",
    //         "zip": "40202"
    //     },
    //     "shipping_address": {
    //         "address1": "Chestnut Street 92",
    //         "address2": "",
    //         "city": "Louisville",
    //         "company": null,
    //         "country": "United States",
    //         "country_code": "US",
    //         "first_name": "Bob",
    //         "last_name": "Norman",
    //         "name": "Bob Norman",
    //         "phone": "555-625-1199",
    //         "province": "Kentucky",
    //         "province_code": "KY",
    //         "zip": "40202"
    //     },
    //     "customer": {
    //         "created_at": "2013-04-23T13:36:50-04:00",
    //         "email": "bob.norman@hostmail.com",
    //         "first_name": "Bob",
    //         "id": 207119551,
    //         "last_name": "Norman",
    //         "note": null,
    //         "orders_count": 0,
    //         "verified_email": true
    //     }
    //  }
    // }
    }