Java

Load an Ed25519 Key from Raw Hex

Demonstrates the Chilkat PrivateKey.LoadEd25519 method, which loads an Ed25519 key pair from raw hexadecimal. The first argument is the 32-byte private seed and the second is the 32-byte public key. Each nonempty value must be exactly 64 hexadecimal digits.

Background: Ed25519 keys are compact fixed-size byte strings rather than the structured ASN.1 of RSA, so raw hex is a natural way to carry them. This loader takes the 32-byte seed (from which the full private key is derived) and the 32-byte public key directly, which is useful when a key originates from a system that emits raw values rather than a PEM or JWK container. For a standard container, use one of the PEM/PKCS #8/JWK loaders instead.

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Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    //  Demonstrates the PrivateKey.LoadEd25519 method, which loads an Ed25519 key pair from raw
    //  hexadecimal.  The 1st argument is the 32-byte private seed and the 2nd is the 32-byte public
    //  key.  Each nonempty value must be exactly 64 hexadecimal digits.

    CkPrivateKey privKey = new CkPrivateKey();

    //  The 32-byte Ed25519 private seed and public key, each as 64 hex digits.
    String privSeedHex = "9d61b19deffkbfa4ffa4d8c8f8a5b4a3d9e8c7b6a5f4e3d2c1b0a9f8e7d6c5b4";
    String pubKeyHex = "d75a980182b10ab7d54bfed3c964073a0ee172f3daa62325af021a68f707511a";

    success = privKey.LoadEd25519(privSeedHex,pubKeyHex);
    if (success == false) {
        System.out.println(privKey.lastErrorText());
        return;
        }

    System.out.println("Loaded an Ed25519 private key.");
  }
}