Load and Validate a JWS from a String

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.LoadJws, which loads a JWS from its compact serialization string. The example then supplies the MAC key and validates the signature.

#include <CkJws.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkJws jws;

    //  Load the JWS compact serialization.
    const char *jwsCompact = "eyJhbGciOiJIUzI1NiJ9.VGhpcyBpcyB0aGUgY29udGVudCB0byBzaWduLg.<signature>";
    success = jws.LoadJws(jwsCompact);
    if (success == false) {
        std::cout << jws.lastErrorText() << "\r\n";
        return;
    }

    //  Provide the HMAC key for signer 0, then validate the signature.  Validate returns 1 when the
    //  signature is cryptographically valid, 0 when it is not, or a negative value on error.
    const char *base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=";
    success = jws.SetMacKey(0,base64Key,"base64");
    if (success == false) {
        std::cout << jws.lastErrorText() << "\r\n";
        return;
    }

    int v = jws.Validate(0);
    if (v < 0) {
        std::cout << jws.lastErrorText() << "\r\n";
        return;
    }

    if (v != 1) {
        std::cout << "The signature is not valid." << "\r\n";
        return;
    }

    std::cout << "The signature is valid." << "\r\n";
    }