Sign a JWS with an HMAC Key from BinData

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetMacKeyBd, which sets the symmetric MAC key for a signature from the raw bytes in a BinData.

#include <CkJwsW.h>
#include <CkJsonObjectW.h>
#include <CkBinDataW.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkJwsW jws;

    //  Protected header specifying HMAC-SHA256.
    CkJsonObjectW header;
    header.UpdateString(L"alg",L"HS256");
    success = jws.SetProtectedHeader(0,header);
    if (success == false) {
        wprintf(L"%s\n",jws.lastErrorText());
        return;
    }

    bool bIncludeBom = false;
    success = jws.SetPayload(L"This is the content to sign.",L"utf-8",bIncludeBom);
    if (success == false) {
        wprintf(L"%s\n",jws.lastErrorText());
        return;
    }

    //  Set the symmetric MAC key for signature 0 from the raw bytes in a BinData.  In production, obtain
    //  the key material from a secure source.
    CkBinDataW bdKey;
    bdKey.AppendEncoded(L"YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=",L"base64");
    success = jws.SetMacKeyBd(0,bdKey);
    if (success == false) {
        wprintf(L"%s\n",jws.lastErrorText());
        return;
    }

    const wchar_t *jwsCompact = jws.createJws();
    if (jws.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",jws.lastErrorText());
        return;
    }

    wprintf(L"%s\n",jwsCompact);
    }