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Get an Ed25519 Key in Raw Hex Format

See more Ed25519 Examples

Demonstrates how to get the private and public key parts of an Ed25519 key in lowercase hex formmat.

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

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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();

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

    // Load an Ed25519 key from some format..
    const priv_key = try chilkat.PrivateKey.init();
    defer priv_key.deinit();

    // This loads an Ed25519 key from an unencrypted PEM file (no password required).
    priv_key.loadAnyFormatFile("qa_data/eddsa/ed25519.pem", "") catch {
        std.debug.print("{s}\n", .{try priv_key.getLastErrorText(alloc)});
        return;
    };

    // The key type should be "ed25519" to indicate an Ed25519 key.
    std.debug.print("key type = {s}\n", .{try priv_key.getKeyType(alloc)});

    // What is the size of the private key in bits?  (should always be 256 bits for Ed25519)
    std.debug.print("size in bits = {d}\n", .{priv_key.getBitLength()});

    // Get the private and public key parts in raw hex format:
    const sb_pub_key_hex = try chilkat.StringBuilder.init();
    defer sb_pub_key_hex.deinit();
    const priv_key_hex = try priv_key.getRawHex(alloc, sb_pub_key_hex);

    // We should have a 32-byte private key (a 64 character hex string).
    std.debug.print("private key = {s}\n", .{priv_key_hex});

    // We should have a 32-byte public key (a 64 character hex string).
    std.debug.print("public key = {s}\n", .{try sb_pub_key_hex.getAsString(alloc)});

    // Sample output:
    // key type = ed25519
    // size in bits = 256
    // private key = d4ee72dbf913584ad5b6d8f1f769f8ad3afe7c28cbf1d4fbe097a88f44755842
    // public key = 19bf44096984cdfe8541bac167dc3b96c85086aa30b6b6cb0c5c38ad703166e1
}