Every application that you’ll create may require an authentication process. This authentication process will at least contains a process of checking user’s login name and their password. To make the system reliable the password we usually stored the password in an encrypted form.

The BasicPasswordEncryptor which implements the PasswordEncryptor interface provide a BasicPasswordEncryptor.encryptPassword(String password) method for encrypting user’s password. To check if the user’s password is correct we use the BasicPasswordEncryptor.checkPassword(String plainText, String encryptedPassword) method.

package org.kodejava.jasypt;

import org.jasypt.util.password.BasicPasswordEncryptor;
import org.jasypt.util.password.PasswordEncryptor;

public class PasswordEncryptorDemo {
    public static void main(String[] args) {
        // Creates an instance of BasicPasswordEncryptor.
        PasswordEncryptor encryptor = new BasicPasswordEncryptor();

        // Encrypted version of user password.
        String encrypted = encryptor.encryptPassword("secret");
        System.out.println("encrypted = " + encrypted);

        // Compare user's plain text password with the encrypted one to check
        // if they are match.
        if (encryptor.checkPassword("secret", encrypted)) {
            System.out.println("Welcome to Jasypt");
        } else {
            System.out.println("Invalid secret word, access denied!");
        }
    }
}

Maven Dependencies

<dependency>
    <groupId>org.jasypt</groupId>
    <artifactId>jasypt</artifactId>
    <version>1.9.3</version>
</dependency>