Encrypt a JWE with a Recipient Public Key

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.SetPublicKey, which sets the public key used to encrypt for a recipient. The example uses RSA-OAEP-256 key management with AES-256-GCM content encryption.

The file path is relative to the application's current working directory. An absolute path may also be used. Supply the path appropriate to your own environment.

#include <CkJweW.h>
#include <CkJsonObjectW.h>
#include <CkPublicKeyW.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkJweW jwe;

    //  Protected header: RSA-OAEP-256 key management with AES-256-GCM content encryption.
    CkJsonObjectW header;
    header.UpdateString(L"alg",L"RSA-OAEP-256");
    header.UpdateString(L"enc",L"A256GCM");
    success = jwe.SetProtectedHeader(header);
    if (success == false) {
        wprintf(L"%s\n",jwe.lastErrorText());
        return;
    }

    //  The file path is relative to the application's current working directory.  An absolute path
    //  may also be used.  Supply the path appropriate to your own environment.
    //  Load the recipient's public key.
    CkPublicKeyW pubKey;
    success = pubKey.LoadFromFile(L"qa_data/recipient_pubkey.pem");
    if (success == false) {
        wprintf(L"%s\n",pubKey.lastErrorText());
        return;
    }

    //  Set the public key used to encrypt for recipient 0.
    success = jwe.SetPublicKey(0,pubKey);
    if (success == false) {
        wprintf(L"%s\n",jwe.lastErrorText());
        return;
    }

    const wchar_t *jweCompact = jwe.encrypt(L"This is the secret content.",L"utf-8");
    if (jwe.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",jwe.lastErrorText());
        return;
    }

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