de.thksystems.util.crypto.PasswordUtils Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of cumin Show documentation

Commons for lang, crypto, xml, dom, text, csv, reflection, annotations, parsing, ...

There is a newer version: 4.3.3

/*
 * tksCommons
 * 
 * Author : Thomas Kuhlmann (ThK-Systems, http://www.thk-systems.de) License : LGPL (https://www.gnu.org/licenses/lgpl.html)
 */
package de.thksystems.util.crypto;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.binary.Hex;

/**
 * Tools to encrypt passwords.
 */
public final class PasswordUtils {

	public static final String DEFAULT_PASSWORD_HASHALGO = "SHA-256";

	private PasswordUtils() {
	}

	/**
	 * Creates a hash of the given password using the given hash algorithm.
	 * 
	 * @return Hex string of password hash.
	 * @throws NoSuchAlgorithmException
	 *             Hash algorithm is not available
	 */
	public static String createPasswordHash(String plainPassword, String hashAlgo) throws NoSuchAlgorithmException {
		if (plainPassword == null || plainPassword.length() == 0) {
			return null;
		}
		MessageDigest md = MessageDigest.getInstance(DEFAULT_PASSWORD_HASHALGO);
		byte[] digest = md.digest(plainPassword.getBytes());
		byte[] digestHex = new Hex("UTF-8").encode(digest);
		return new String(digestHex);
	}

	/**
	 * Creates a hash of the given password using {@value #DEFAULT_PASSWORD_HASHALGO}.
	 * 
	 * @return Hex string of password hash.
	 */
	public static String createPasswordHash(String plainPassword) {
		try {
			return createPasswordHash(plainPassword, DEFAULT_PASSWORD_HASHALGO);
		} catch (NoSuchAlgorithmException e) {
			throw new CryptoRuntimeException(e); // Should not happen
		}
	}

	/**
	 * Encrypts given password using SHA-256 and encodes Base64 .
	 * 
	 * @Deprecated Use {@link #createPasswordHash(String)}
	 */
	public static String encryptAsPassword(String password) {
		if (password == null || password.length() == 0) {
			return null;
		}
		try {
			MessageDigest md = MessageDigest.getInstance(DEFAULT_PASSWORD_HASHALGO);
			byte[] digest = md.digest(password.getBytes());
			String encryptedPassword = new String(new Base64().encode(digest));
			return encryptedPassword;
		} catch (NoSuchAlgorithmException e) {
			throw new CryptoRuntimeException(e);
		}
	}
}