org.cryptacular.bean.SimpleHashBean Maven / Gradle / Ivy

Go to download

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

The spectacular complement to the Bouncy Castle crypto API for Java.

There is a newer version: 1.2.7

/* See LICENSE for licensing and NOTICE for copyright. */
package org.cryptacular.bean;

import org.bouncycastle.crypto.Digest;
import org.cryptacular.CryptoException;
import org.cryptacular.StreamException;
import org.cryptacular.spec.Spec;

/**
 * Computes a hash using an instance of {@link Digest} specified by {@link #setDigestSpec(org.cryptacular.spec.Spec)}.
 *
 * @author  Middleware Services
 */
public class SimpleHashBean extends AbstractHashBean implements HashBean
{

  /** Creates a new instance. */
  public SimpleHashBean() {}


  /**
   * Creates a new instance by specifying all properties.
   *
   * @param  digestSpec  Digest specification.
   * @param  iterations  Number of hash rounds.
   */
  public SimpleHashBean(final Spec digestSpec, final int iterations)
  {
    super(digestSpec, iterations);
  }


  @Override
  public byte[] hash(final Object... data) throws CryptoException, StreamException
  {
    return hashInternal(data);
  }


  /**
   * Compares a known hash value with the hash of the given data.
   *
   * @param  hash  Known hash value. If the length of the array is greater than the length of the digest output,
   *               anything beyond the digest length is considered salt data that is hashed after the
   *               input data.
   * @param  data  Data to hash.
   *
   * @return  True if the hashed data matches the given hash, false otherwise.
   *
   * @throws  CryptoException  on hash computation errors.
   * @throws  StreamException  on stream IO errors.
   */
  @Override
  public boolean compare(final byte[] hash, final Object... data) throws CryptoException, StreamException
  {
    return compareInternal(hash, data);
  }
}