Java

Change Password for Java KeyStore File

See more Java KeyStore (JKS) Examples

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. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.JavaKeyStore;

public class ChilkatExample {

    public static void main(String[] args) {
        // This requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        JavaKeyStore jks = new JavaKeyStore();

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

        // Load the Java keystore from a file.
        try {
            jks.loadFile(oldJksPassword, jksPath);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

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

        int i = 0;
        while (i < numPrivateKeys) {
            try {
                jks.changePassword(i, oldJksPassword, newJksPassword);
            } catch (ChilkatException e) {
                System.out.println(e.getLastErrorText());
                return;
            }

            i = i + 1;
        }

        // Write the JKS using the new password for the JKS file's keyed digest.
        try {
            jks.toFile(newJksPassword, jksPath);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Updated the password for the Java keystore file.");
    }
}