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package com.unbound.common.crypto;

import com.unbound.common.STR;

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

public final class SHA256
{
  private MessageDigest md;

  public SHA256()
  {
    md = SystemProvider.MessageDigest.getInstance("SHA-256");
  }

  public SHA256 update(byte[] in)
  {
    md.update(in);
    return this;
  }

  public SHA256 update(byte[] in, int offset, int length)
  {
    md.update(in, offset, length);
    return this;
  }

  public SHA256 update(String in)
  {
    md.update(STR.utf8(in));
    return this;
  }

  public byte[] end()
  {
    return md.digest();
  }

  public static byte[] hash(byte[] in)
  {
    return new SHA256().update(in).end();
  }

  public static byte[] hash(String in)
  {
    return new SHA256().update(in).end();
  }

}