Encrypt a JWE with a Symmetric Wrapping Key

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.SetWrappingKey, which sets the symmetric key-wrapping key for a recipient. The key bytes are supplied in a named encoding such as hex or base64.

#include <C_CkJweW.h>
#include <C_CkJsonObjectW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkJweW jwe;
    HCkJsonObjectW header;
    const wchar_t *base64Key;
    const wchar_t *jweCompact;

    success = FALSE;

    jwe = CkJweW_Create();

    //  Protected header: AES key-wrap with AES-256-GCM content encryption.
    header = CkJsonObjectW_Create();
    CkJsonObjectW_UpdateString(header,L"alg",L"A256KW");
    CkJsonObjectW_UpdateString(header,L"enc",L"A256GCM");
    success = CkJweW_SetProtectedHeader(jwe,header);
    if (success == FALSE) {
        wprintf(L"%s\n",CkJweW_lastErrorText(jwe));
        CkJweW_Dispose(jwe);
        CkJsonObjectW_Dispose(header);
        return;
    }

    //  Set the symmetric key-wrapping key for recipient 0.  The key bytes are provided in the named
    //  encoding (here base64).  In production, obtain the key from a secure source rather than hard-coding
    //  it.
    base64Key = L"YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=";
    success = CkJweW_SetWrappingKey(jwe,0,base64Key,L"base64");
    if (success == FALSE) {
        wprintf(L"%s\n",CkJweW_lastErrorText(jwe));
        CkJweW_Dispose(jwe);
        CkJsonObjectW_Dispose(header);
        return;
    }

    jweCompact = CkJweW_encrypt(jwe,L"This is the secret content.",L"utf-8");
    if (CkJweW_getLastMethodSuccess(jwe) == FALSE) {
        wprintf(L"%s\n",CkJweW_lastErrorText(jwe));
        CkJweW_Dispose(jwe);
        CkJsonObjectW_Dispose(header);
        return;
    }

    wprintf(L"%s\n",jweCompact);


    CkJweW_Dispose(jwe);
    CkJsonObjectW_Dispose(header);

    }