Zig

Load an Ed25519 Private Key from Hex

See more Ed25519 Examples

Demonstrates how to load an Ed25519 private key from raw hex bytes.

Note: This example requires Chilkat v9.5.0.83 or greater.

Zig

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

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

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    const priv_key = try chilkat.PrivateKey.init();
    defer priv_key.deinit();

    // We have the hexidecimal encoded bytes of the private key and public key:
    var priv_key_hex: [:0]const u8 = "d4ee72dbf913584ad5b6d8f1f769f8ad3afe7c28cbf1d4fbe097a88f44755842";
    const pub_key_hex = "19bf44096984cdfe8541bac167dc3b96c85086aa30b6b6cb0c5c38ad703166e1";

    // Load these values into the Chilkat private key object:
    priv_key.loadEd25519(priv_key_hex, pub_key_hex) catch {
        std.debug.print("{s}\n", .{try priv_key.getLastErrorText(alloc)});
        return;
    };

    // ---------------------------------------------------------------
    // We don't actually need the public key.  If we pass an empty string for the public key,
    // Chilkat will automatically compute it.
    const priv_key2 = try chilkat.PrivateKey.init();
    defer priv_key2.deinit();
    try priv_key2.loadEd25519(priv_key_hex, "");

    // Let's get the public key to see that it computed the same value.
    const sb_pub_key_hex = try chilkat.StringBuilder.init();
    defer sb_pub_key_hex.deinit();
    priv_key_hex = try priv_key2.getRawHex(alloc, sb_pub_key_hex);
    std.debug.print("computed public key = {s}\n", .{try sb_pub_key_hex.getAsString(alloc)});

    // The output should be:
    // computed public key = 19bf44096984cdfe8541bac167dc3b96c85086aa30b6b6cb0c5c38ad703166e1
}