Unicode C++

secp256k1 Key Generation and Keccak-256

See more ECC Examples

Starting in v11.0.0, Chilkat supports both secp256k1 key generation and Keccak-256 directly. These algorithms are typically used for Bitcoin and Ethereum. Unicode C++

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

void ChilkatSample(void)
    {
    bool success = false;

    // This example 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 ECDSA private key.
    CkPrngW fortuna;
    const wchar_t *entropy = fortuna.getEntropy(32,L"base64");
    success = fortuna.AddEntropy(entropy,L"base64");

    CkEccW ecc;

    // Generate a random ECDSA private key on the secp256k1 curve.
    CkPrivateKeyW privKey;
    success = ecc.GenKey(L"secp256k1",fortuna,privKey);
    if (success == false) {
        wprintf(L"%s\n",ecc.lastErrorText());
        return;
    }

    wprintf(L"Successfully generated a sec256k1 key.\n");

    // Show how to compute the Keccak-256 hash in a few ways.
    CkStringBuilderW sb;
    sb.Append(L"hello");

    wprintf(L"keccak-256: %s\n",sb.getHash(L"keccak-256",L"hex_lower",L"utf-8"));

    // Output:
    // keccak-256: 1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8

    // To keccak-256 hash binary data
    CkBinDataW bd;
    bd.AppendEncoded(L"00010203040506",L"hex");

    wprintf(L"keccak-256: %s\n",bd.getHash(L"keccak-256",L"hex_lower"));

    // Output:
    // keccak-256: 801560412425120fa609be232d6fa71c7f64f42aee7977267687dcc0a2f5aa63
    }