Unicode C++

Encrypt Binary Content to a JWE

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.EncryptBd, which encrypts binary content held in a BinData and writes the resulting JWE into a StringBuilder.

Background. JWE (JSON Web Encryption) protects content with a content-encryption algorithm (the header enc value) while the content-encryption key is managed by the key-management algorithm (the header alg value). This example uses AES key wrapping with a symmetric wrapping key.

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Unicode C++

#include <CkJweW.h>
#include <CkJsonObjectW.h>
#include <CkBinDataW.h>
#include <CkStringBuilderW.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkJweW jwe;

    //  Set the JWE protected header, specifying the key-management algorithm (alg) and the content-
    //  encryption algorithm (enc).
    CkJsonObjectW header;
    header.UpdateString(L"alg",L"A256KW");
    header.UpdateString(L"enc",L"A256GCM");
    success = jwe.SetProtectedHeader(header);
    if (success == false) {
        wprintf(L"%s\n",jwe.lastErrorText());
        return;
    }

    //  The 256-bit key-wrapping key (base64) for recipient index 0.  In production, obtain the key
    //  from a secure source rather than hard-coding it.
    const wchar_t *base64Key = L"YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=";
    success = jwe.SetWrappingKey(0,base64Key,L"base64");
    if (success == false) {
        wprintf(L"%s\n",jwe.lastErrorText());
        return;
    }

    //  Encrypt binary content held in a BinData, writing the resulting JWE into a StringBuilder.
    CkBinDataW bdContent;
    bdContent.AppendString(L"Binary content to encrypt.",L"utf-8");

    CkStringBuilderW sbJwe;
    success = jwe.EncryptBd(bdContent,sbJwe);
    if (success == false) {
        wprintf(L"%s\n",jwe.lastErrorText());
        return;
    }

    wprintf(L"%s\n",sbJwe.getAsString());
    }