C++

Load a Raw Ed25519 Public Key

Demonstrates the Chilkat PublicKey.LoadEd25519 method, which loads a raw Ed25519 public key from a hexadecimal string. The only argument must be exactly 64 hexadecimal characters (32 bytes).

Background: An Ed25519 public key is simply a fixed 32-byte value, so raw hex is a natural way to carry it — no ASN.1 container required. This loader takes those bytes directly, which is useful when a key comes from a system that emits raw values rather than a PEM or JWK. For a standard container, use LoadFromString or one of the DER/PEM loaders instead.

Chilkat C++ Downloads

Download Chilkat for C++

C++

#include <CkPublicKey.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  Demonstrates the PublicKey.LoadEd25519 method, which loads a raw Ed25519 public key from a
    //  hexadecimal string.  The only argument must be exactly 64 hexadecimal characters (32 bytes).

    CkPublicKey pubKey;

    //  The 32-byte Ed25519 public key as 64 hex digits.
    const char *pubKeyHex = "d75a980182b10ab7d54bfed3c964073a0ee172f3daa62325af021a68f707511a";

    success = pubKey.LoadEd25519(pubKeyHex);
    if (success == false) {
        std::cout << pubKey.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Loaded an Ed25519 public key." << "\r\n";
    }