Set the JWS Protected Header

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetProtectedHeader, which sets the integrity-protected header for a signer from a JsonObject. The header specifies the signature algorithm (alg).

#include <C_CkJwsW.h>
#include <C_CkJsonObjectW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkJwsW jws;
    HCkJsonObjectW header;

    success = FALSE;

    jws = CkJwsW_Create();

    //  Build the JWS protected header.  The "alg" member names the signature algorithm.
    header = CkJsonObjectW_Create();
    CkJsonObjectW_UpdateString(header,L"alg",L"HS256");

    //  Set the protected header for signer index 0.  The protected header is integrity-protected: it is
    //  covered by the signature.
    success = CkJwsW_SetProtectedHeader(jws,0,header);
    if (success == FALSE) {
        wprintf(L"%s\n",CkJwsW_lastErrorText(jws));
        CkJwsW_Dispose(jws);
        CkJsonObjectW_Dispose(header);
        return;
    }

    wprintf(L"Protected header set.\n");


    CkJwsW_Dispose(jws);
    CkJsonObjectW_Dispose(header);

    }