io.github.mmm.crypto.hash.access.HashAccess Maven / Gradle / Ivy

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package io.github.mmm.crypto.hash.access;

import io.github.mmm.crypto.CryptoAccess;
import io.github.mmm.crypto.hash.HashConfig;
import io.github.mmm.crypto.hash.HashCreator;
import io.github.mmm.crypto.hash.HashCreatorImplDigest;
import io.github.mmm.crypto.hash.HashCreatorImplMultipleRounds;
import io.github.mmm.crypto.hash.HashFactory;

/**
 * {@link CryptoAccess} for {@link HashFactory}.
 *
 * @since 1.0.0
 */
public class HashAccess extends CryptoAccess implements HashFactory {

  private final HashConfig config;

  /**
   * The constructor.
   *
   * @param config the {@link HashAccess}.
   */
  public HashAccess(HashConfig config) {

    super();
    if (config.getIterationCount() <= 0) {
      throw new IllegalArgumentException("config.iterationCount=" + config.getIterationCount());
    }
    this.config = config;
  }

  @Override
  public HashCreator newHashCreator() {

    int iterationCount = this.config.getIterationCount();
    if (iterationCount <= 1) {
      return new HashCreatorImplDigest(this.config.getAlgorithm(), this.config.getProvider());
    } else {
      return new HashCreatorImplMultipleRounds(this.config.getAlgorithm(), this.config.getProvider(), iterationCount);
    }
  }

  @Override
  public String toString() {

    return this.config.getAlgorithm();
  }

  /**
   * @param config the {@link HashAccess}.
   * @return the {@link HashAccess}.
   */
  public static HashAccess of(HashConfig config) {

    return new HashAccess(config);
  }

}