(C++) Everyware API RSA Encrypt JSON

See more RSA Examples

Demonstrates how to RSA encrypt JSON using everyware.com's RSA public key.

For more information, see https://docs.everyware.com/docs/access-iframe#sample-json--encrypted-payload

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#include <CkJsonObject.h>
#include <CkDateTime.h>
#include <CkStringBuilder.h>
#include <CkPublicKey.h>
#include <CkRsa.h>

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

    bool success;

    // First build the JSON to be encrypted.
    CkJsonObject json;
    json.UpdateString("provider_key","USER GUID HERE");
    json.UpdateString("menu_item","payment");
    CkDateTime dt;
    dt.SetFromCurrentSystemTime();
    json.UpdateString("date_time",dt.getAsUnixTimeStr(false));

    // This build JSON like the following:

    // {
    //     "provider_key": "USER GUID HERE",
    //     "menu_item": "payment",
    //     "date_time": "1588163411"
    // }

    // When we sign, we'll want to sign the most compact JSON possible
    json.put_EmitCompact(true);

    // Everyware's RSA public key is at:  https://docs.everyware.com/docs/everyware-public-rsa-key
    CkStringBuilder sb;
    bool bCrlf = true;
    sb.AppendLine("-----BEGIN PUBLIC KEY-----",bCrlf);
    sb.AppendLine("MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAxNbflxUSWQ3XJ1N9dAoh",bCrlf);
    sb.AppendLine("k+uaiFsg3wkPi9LGS/mH8DtHBgZxKyz+oQBDtnDd9FDEo0ql7MMgCMsTAv27W5vk",bCrlf);
    sb.AppendLine("Pu0rm6zhcTeYquWEuVCS7VtVsyTATr0Z9WhqNeZlIRurovJAXl2jRDX6QeY5dayC",bCrlf);
    sb.AppendLine("ubwyG4lBWE4fCakGY6zlh+oaElK0rvblqjYoEg3dn4KPRCYGof8OFxLptHThD4cE",bCrlf);
    sb.AppendLine("T30j+utVafhO0HRyJ4iR3Pigb4GXdWBtJEEEWddZJizMkjFQkyUAoYLOT8EJ2TW3",bCrlf);
    sb.AppendLine("Tz8SvAuHBUEFcPWTSTMAG/bSp5wrYBTXaeEhx+wrYa60OruHuzgmhzKyQVuYlCNJ",bCrlf);
    sb.AppendLine("HdbnassuIRjjSNo25o4AdSlWwpGfBZjAiyEInR+KGpHdhKTxSekJxiwiXUS0UfSG",bCrlf);
    sb.AppendLine("prOpd5PzWaAR7DvjLsdmR9XffxvJCVxC735gLK7hDJKjCajDPHVDr8FSL8xMlrq0",bCrlf);
    sb.AppendLine("nKxtsHeRl1yzoGrRr12+9MiQnHtpqROTNXcXdwe3v+Vh8V5k8v8oIrcgh1+/N7Bd",bCrlf);
    sb.AppendLine("NiRsy1gFHBdu/he/KcDRT/9/acQFMPLQueGfZxUvU5As6pEONjtKX2MUg2fMF6Rc",bCrlf);
    sb.AppendLine("sQVVrLzg0g7EcuHGfuPeKfD/716MvS8NU7rX+2soijCSQv/e18PJPMVDlcMXjnup",bCrlf);
    sb.AppendLine("PPx1tStemesavFlj1okhS6UCAwEAAQ==",bCrlf);
    sb.AppendLine("-----END PUBLIC KEY-----",bCrlf);

    CkPublicKey pubkey;
    success = pubkey.LoadFromString(sb.getAsString());
    if (success == false) {
        std::cout << pubkey.lastErrorText() << "\r\n";
        return;
    }

    CkRsa rsa;
    success = rsa.ImportPublicKeyObj(pubkey);
    if (success == false) {
        std::cout << rsa.lastErrorText() << "\r\n";
        return;
    }

    // We probably need a base64Url encoded encrypted key.
    // Using straight-up base64 would potenially include chars that are not URL safe (i.e. have special meanings in URLs)
    rsa.put_EncodingMode("base64url");

    const char *encryptedJson = rsa.encryptStringENC(json.emit(),false);

    // Build the URL
    // Such as:  https://portal.everyware.com/Account/LoginMenu?data={Base64Url_encrypted_JSON}
    CkStringBuilder sbUrl;
    sbUrl.Append("https://portal.everyware.com/Account/LoginMenu?data=");
    sbUrl.Append(encryptedJson);

    std::cout << sbUrl.getAsString() << "\r\n";
    }