(Unicode C++) Generate an ECDSA Key

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

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#include <CkPrngW.h>
#include <CkEccW.h>
#include <CkPrivateKeyW.h>

void ChilkatSample(void)
    {
    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

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

    CkEccW ecc;

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

    CkPrivateKeyW privKey;
    success = ecc.GenKey(L"secp256r1",fortuna,privKey);
    if (success != true) {
        wprintf(L"%s\n",ecc.lastErrorText());
        return;
    }

    wprintf(L"%s\n",privKey.getXml());

    // 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(L"pemPassword",L"myPemFiles/eccKey123.pem");
    if (success != true) {
        wprintf(L"%s\n",privKey.lastErrorText());
    }

    wprintf(L"finished.\n");
    }