Set the Optional JWS Unprotected Header

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetUnprotectedHeader, which sets the optional unprotected header for a signature.

#include <CkJws.h>
#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkJws jws;

    //  Protected header specifying HMAC-SHA256.
    CkJsonObject header;
    header.UpdateString("alg","HS256");
    success = jws.SetProtectedHeader(0,header);
    if (success == false) {
        std::cout << jws.lastErrorText() << "\r\n";
        return;
    }

    //  Set the optional unprotected header for signature 0.  Unlike the protected header, it is not
    //  covered by the signature.  It is carried in the JSON serialization forms of a JWS.
    CkJsonObject unprotected;
    unprotected.UpdateString("kid","signer-key-1");
    success = jws.SetUnprotectedHeader(0,unprotected);
    if (success == false) {
        std::cout << jws.lastErrorText() << "\r\n";
        return;
    }

    bool bIncludeBom = false;
    success = jws.SetPayload("This is the content to sign.","utf-8",bIncludeBom);
    if (success == false) {
        std::cout << jws.lastErrorText() << "\r\n";
        return;
    }

    const char *base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=";
    success = jws.SetMacKey(0,base64Key,"base64");
    if (success == false) {
        std::cout << jws.lastErrorText() << "\r\n";
        return;
    }

    //  Because an unprotected header is present, the JWS is produced in a JSON serialization form.
    const char *jwsJson = jws.createJws();
    if (jws.get_LastMethodSuccess() == false) {
        std::cout << jws.lastErrorText() << "\r\n";
        return;
    }

    std::cout << jwsJson << "\r\n";
    }