Create a JWS

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.CreateJws, which creates and returns a JWS from the current payload, headers, and signing key.

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

void ChilkatSample(void)
    {
    bool success = false;

    CkJws jws;

    //  Set the protected header for signer 0, specifying the signature algorithm (alg).
    CkJsonObject header;
    header.UpdateString("alg","HS256");
    success = jws.SetProtectedHeader(0,header);
    if (success == false) {
        std::cout << jws.lastErrorText() << "\r\n";
        return;
    }

    //  Set the payload to be signed.
    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;
    }

    //  Provide the HMAC key (base64) for signer 0.  In production, obtain the key from a secure source
    //  rather than hard-coding it.
    const char *base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=";
    success = jws.SetMacKey(0,base64Key,"base64");
    if (success == false) {
        std::cout << jws.lastErrorText() << "\r\n";
        return;
    }

    //  Create the JWS from the current payload, headers, and signing key.  The returned string is the
    //  JWS (compact serialization by default).
    const char *jwsCompact = jws.createJws();
    if (jws.get_LastMethodSuccess() == false) {
        std::cout << jws.lastErrorText() << "\r\n";
        return;
    }

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