(Node.js) 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.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // 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.

    var key = new chilkat.SshKey();

    var success = key.GenerateEd25519Key();
    if (success !== true) {
        console.log(key.LastErrorText);
        return;
    }

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

    // Export the ed25519 private key to unencrypted PuTTY format:
    var exportEncrypted = false;
    var 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.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

    console.log("Success!");

}

chilkatExample();