(Unicode C++) RSA Encrypt and OpenSSL Decrypt

Demonstrates how to use Chilkat to RSA encrypt, and then use OpenSSL to decrypt.

Note: This example requires Chilkat v11.0.0 or greater.

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#include <CkRsaW.h>
#include <CkPrivateKeyW.h>
#include <CkPublicKeyW.h>
#include <CkBinDataW.h>

void ChilkatSample(void)
    {
    bool success = false;

    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkRsaW rsa;

    CkPrivateKeyW privKey;
    success = rsa.GenKey(2048,privKey);
    success = privKey.SavePkcs8PemFile(L"qa_output/privKey.pem");

    CkPublicKeyW pubKey;
    privKey.ToPublicKey(pubKey);

    rsa.put_EncodingMode(L"base64");
    const wchar_t *plainText = L"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01234567890";
    bool bUsePrivateKey = false;
    rsa.UsePublicKey(pubKey);
    const wchar_t *encryptedStr = rsa.encryptStringENC(plainText,bUsePrivateKey);

    CkBinDataW bd;
    bd.AppendEncoded(encryptedStr,L"base64");
    success = bd.WriteFile(L"qa_output/enc.dat");

    // The OpenSSL command to decrypt is:
    // openssl pkeyutl -in enc.dat -inkey privKey.pem -keyform PEM -pkeyopt rsa_padding_mode:pkcs1 -decrypt

    wprintf(L"OK\n");
    }