(Node.js) Change Password for Java KeyStore File

Demonstrates how to load a Java keystore, change the password, and save using the new password. If the Java keystore contains only trusted root certificates, then it's simply a matter of loading the JKS with the existing password, and then saving with a new password. If the JKS contains private key entries, then each private key entry must be re-keyed using the new password by calling the ChangePassword method.

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

    var jks = new chilkat.JavaKeyStore();

    var oldJksPassword = "existingPassword";
    var newJksPassword = "newPassword";
    var jksPath = "/someDir/keyStore.jks";

    // Load the Java keystore from a file.
    var success = jks.LoadFile(oldJksPassword,jksPath);
    if (success !== true) {
        console.log(jks.LastErrorText);
        return;
    }

    // If the JKS contains private key entries, then each
    // must be re-keyed with the new password by calling ChangePassword.
    var numPrivateKeys = jks.NumPrivateKeys;

    var i = 0;
    while (i < numPrivateKeys) {

        success = jks.ChangePassword(i,oldJksPassword,newJksPassword);
        if (success !== true) {
            console.log(jks.LastErrorText);
            return;
        }

        i = i+1;
    }

    // Write the JKS using the new password for the JKS file's keyed digest.
    success = jks.ToFile(newJksPassword,jksPath);
    if (success !== true) {
        console.log(jks.LastErrorText);
        return;
    }

    console.log("Updated the password for the Java keystore file.");

}

chilkatExample();