(Node.js) Convert DSA DER Private Key to PEM

Converts a DSA private key from DER format to PEM. Demonstrates how to write both encrypted and unencrypted PEM formatted private keys.

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() {

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

    var dsa = new chilkat.Dsa();

    // Load a DER private key.
    var success = dsa.FromDerFile("dsa_priv.der");
    if (success !== true) {
        console.log(dsa.LastErrorText);
        return;
    }

    var pemStr;

    // Save to unencrypted PEM:
    pemStr = dsa.ToPem();
    success = dsa.SaveText(pemStr,"dsa_priv.pem");
    if (success !== true) {
        console.log(dsa.LastErrorText);
        return;
    }

    // Save to encrypted PEM:
    pemStr = dsa.ToEncryptedPem("myPassword");
    success = dsa.SaveText(pemStr,"dsa_privEncrypted.pem");
    if (success !== true) {
        console.log(dsa.LastErrorText);
        return;
    }

    console.log("Finished!");

}

chilkatExample();