(PHP Extension) 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.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

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

$jks = new CkJavaKeyStore();

$oldJksPassword = 'existingPassword';
$newJksPassword = 'newPassword';
$jksPath = '/someDir/keyStore.jks';

// Load the Java keystore from a file.
$success = $jks->LoadFile($oldJksPassword,$jksPath);
if ($success != true) {
    print $jks->lastErrorText() . "\n";
    exit;
}

// If the JKS contains private key entries, then each
// must be re-keyed with the new password by calling ChangePassword.
$numPrivateKeys = $jks->get_NumPrivateKeys();

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

    $success = $jks->ChangePassword($i,$oldJksPassword,$newJksPassword);
    if ($success != true) {
        print $jks->lastErrorText() . "\n";
        exit;
    }

    $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) {
    print $jks->lastErrorText() . "\n";
    exit;
}

print 'Updated the password for the Java keystore file.' . "\n";

?>