(MFC) Generate an ECC Key

Demonstrates how to generate an ECC key.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkGlobal.h>
#include <CkPrng.h>
#include <CkEcc.h>
#include <CkPrivateKey.h>

void ChilkatSample(void)
    {
    CkString strOut;

    //  All Chilkat classes can be unlocked at once at the beginning of a program
    //  by calling UnlockBundle.  It requires a Bundle unlock code.
    CkGlobal chilkatGlob;
    bool success = chilkatGlob.UnlockBundle("Anything for 30-day trial.");
    if (success != true) {
        strOut.append(chilkatGlob.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Create a Fortuna PRNG and seed it with system entropy.
    //  This will be our source of random data for generating the ECC private key.
    CkPrng fortuna;
    const char *entropy = fortuna.getEntropy(32,"base64");
    success = fortuna.AddEntropy(entropy,"base64");

    CkEcc ecc;

    //  Generate a random ECC private key on the secp256r1 curve.
    //  Chilkat also supports other curves, such as secp384r1, secp521r1, and secp256k1.

    CkPrivateKey *privKey = ecc.GenEccKey("secp256r1",fortuna);
    if (ecc.get_LastMethodSuccess() != true) {
        strOut.append(ecc.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    strOut.append(privKey->getXml());
    strOut.append("\r\n");

    //  Save the private key to PKCS8 encrypted PEM
    //  (The private key can be saved in a variety of different formats. See the online reference documentation.)
    success = privKey->SavePkcs8EncryptedPemFile("pemPassword","myPemFiles/eccKey123.pem");
    if (success != true) {
        strOut.append(privKey->lastErrorText());
        strOut.append("\r\n");
    }

    delete privKey;

    strOut.append("finished.");
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }