(C++) Generate an ECDSA Key

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

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#include <CkPrng.h>
#include <CkEcc.h>
#include <CkPrivateKey.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.
    CkPrng fortuna;
    const char *entropy = fortuna.getEntropy(32,"base64");
    bool 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;
    success = ecc.GenKey("secp256r1",fortuna,privKey);
    if (success != true) {
        std::cout << ecc.lastErrorText() << "\r\n";
        return;
    }

    std::cout << privKey.getXml() << "\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) {
        std::cout << privKey.lastErrorText() << "\r\n";
    }

    std::cout << "finished." << "\r\n";
    }