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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.

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const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // 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).

    const pub_key = try chilkat.PublicKey.init();
    defer pub_key.deinit();

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

    pub_key.loadEd25519(pub_key_hex) catch {
        std.debug.print("{s}\n", .{try pub_key.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("Loaded an Ed25519 public key.\n", .{});
}