How do I create an encrypted string for a password?

You are creating a user management system that will keep user profile and their credential or password. For security reason you’ll need to protect the password, to do this you can use the MessageDigest provided by Java API to encrypt the password. The code example below show you an example how to use it.

package org.kodejava.security;

import java.security.MessageDigest;

public class EncryptExample {
    public static void main(String[] args) {
        String password = "secret";
        String algorithm = "SHA";

        byte[] plainText = password.getBytes();

        try {
            MessageDigest digest = MessageDigest.getInstance(algorithm);
            digest.reset();
            digest.update(plainText);
            byte[] encodedPassword = digest.digest();

            StringBuilder builder = new StringBuilder();
            for (byte b : encodedPassword) {
                if ((b & 0xff) < 0x10) {
                    builder.append("0");
                }
                builder.append(Long.toString(b & 0xff, 16));
            }

            System.out.println("Plain    : " + password);
            System.out.println("Encrypted: " + builder.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Here is the example of our encrypted password:

Plain    : secret
Encrypted: e5e9fa1ba31ecd1ae84f75caaa474f3a663f05f4

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Wayan

Founder at Kode Java

A programmer, runner and recreational diver, lives on the island of Bali, Indonesia. Programming in Java, Spring Framework, Hibernate / JPA, MySQL. To support me working on this project, buy me a cup of coffee, every little bit helps. Thank you.

How do I create an encrypted string for a password?

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