(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 <C_CkPrngW.h>
#include <C_CkEccW.h>
#include <C_CkPrivateKeyW.h>

void ChilkatSample(void)
    {
    HCkPrngW fortuna;
    const wchar_t *entropy;
    BOOL success;
    HCkEccW ecc;
    HCkPrivateKeyW privKey;

    // 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.
    fortuna = CkPrngW_Create();
    entropy = CkPrngW_getEntropy(fortuna,32,L"base64");
    success = CkPrngW_AddEntropy(fortuna,entropy,L"base64");

    ecc = CkEccW_Create();

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

    privKey = CkPrivateKeyW_Create();
    success = CkEccW_GenKey(ecc,L"secp256r1",fortuna,privKey);
    if (success != TRUE) {
        wprintf(L"%s\n",CkEccW_lastErrorText(ecc));
        CkPrngW_Dispose(fortuna);
        CkEccW_Dispose(ecc);
        CkPrivateKeyW_Dispose(privKey);
        return;
    }

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

    // 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 = CkPrivateKeyW_SavePkcs8EncryptedPemFile(privKey,L"pemPassword",L"myPemFiles/eccKey123.pem");
    if (success != TRUE) {
        wprintf(L"%s\n",CkPrivateKeyW_lastErrorText(privKey));
    }

    wprintf(L"finished.\n");


    CkPrngW_Dispose(fortuna);
    CkEccW_Dispose(ecc);
    CkPrivateKeyW_Dispose(privKey);

    }