(Java) Generate ed25519 Key and Save to PuTTY Format

Generates an ED25519 key and saves to PuTTY format.

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

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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[])
  {
    // Note: Requires Chilkat v9.5.0.83 or greater.

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

    CkSshKey key = new CkSshKey();

    boolean success = key.GenerateEd25519Key();
    if (success != true) {
        System.out.println(key.lastErrorText());
        return;
        }

    // We can optionally set a comment to be included in the exported key.
    key.put_Comment("This is my new ed25519 key.");

    // Export the ed25519 private key to unencrypted PuTTY format:
    boolean exportEncrypted = false;
    String exportedKey = key.toPuttyPrivateKey(exportEncrypted);
    success = key.SaveText(exportedKey,"qa_output/privkey_putty_unencrypted.ppk");

    // The unencrypted PuTTY key looks like this:

    // 	PuTTY-User-Key-File-2: ssh-ed25519
    // 	Encryption: none
    // 	Comment: This is my new ed25519 key.
    // 	Public-Lines: 2
    // 	AAAAC3NzaC1lZDI1NTE5AAAAIJn6m7yKzkAAHXzzjE1zv4RqtdE8r5eTegcpbNDF
    // 	OPYs
    // 	Private-Lines: 1
    // 	AAAAIFgwbZ38AR9Oiw930wsCcCGymQRBa2Y7qBq6R3HCe9VL
    // 	Private-MAC: 892573676dd13ef70b6ab7ef219decdfbd5b1857

    // Export the ed25519 private key to encrypted PuTTY format:
    key.put_Password("secret");
    exportEncrypted = true;
    exportedKey = key.toPuttyPrivateKey(exportEncrypted);
    success = key.SaveText(exportedKey,"qa_output/privkey_putty_encrypted.ppk");

    // The encrypted PuTTY key looks like this:

    // 	PuTTY-User-Key-File-2: ssh-ed25519
    // 	Encryption: aes256-cbc
    // 	Comment: This is my new ed25519 key.
    // 	Public-Lines: 2
    // 	AAAAC3NzaC1lZDI1NTE5AAAAIJn6m7yKzkAAHXzzjE1zv4RqtdE8r5eTegcpbNDF
    // 	OPYs
    // 	Private-Lines: 1
    // 	aIa9mY22htPElPgWhtXesp97662JECxaSsnNqvhD06P+o18immv8ohn73vI/bhQB
    // 	Private-MAC: 312221dc90660859fe68df300767f8f779046815

    System.out.println("Success!");
  }
}