/**
* Novacoin classes library
* Copyright (C) 2015 Alex D. (balthazar.ad@gmail.com)
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see .
*/
using Org.BouncyCastle.Crypto.Digests;
namespace Novacoin
{
///
/// Representation of Double SHA-256 hash
///
public class Hash256 : Hash
{
private static Sha256Digest _hasher256 = new Sha256Digest();
// 32 bytes
public override int hashSize
{
get { return _hasher256.GetDigestSize(); }
}
public Hash256() : base() { }
public Hash256(byte[] bytes, int offset=0) : base(bytes, offset) { }
public Hash256(Hash256 h) : base(h) { }
public static Hash256 Compute256(byte[] dataBytes)
{
var digest1 = new byte[32];
var digest2 = new byte[32];
_hasher256.BlockUpdate(dataBytes, 0, dataBytes.Length);
_hasher256.DoFinal(digest1, 0);
_hasher256.BlockUpdate(digest1, 0, digest1.Length);
_hasher256.DoFinal(digest2, 0);
return new Hash256(digest2);
}
public static Hash256 Compute256(ref byte[] input1, ref byte[] input2)
{
var digest1 = new byte[_hasher256.GetDigestSize()];
var digest2 = new byte[_hasher256.GetDigestSize()];
_hasher256.BlockUpdate(input1, 0, input1.Length);
_hasher256.BlockUpdate(input2, 0, input2.Length);
_hasher256.DoFinal(digest1, 0);
_hasher256.BlockUpdate(digest1, 0, digest1.Length);
_hasher256.DoFinal(digest2, 0);
return new Hash256(digest2);
}
public static byte[] ComputeRaw256(byte[] dataBytes)
{
var digest1 = new byte[32];
var digest2 = new byte[32];
_hasher256.BlockUpdate(dataBytes, 0, dataBytes.Length);
_hasher256.DoFinal(digest1, 0);
_hasher256.BlockUpdate(digest1, 0, digest1.Length);
_hasher256.DoFinal(digest2, 0);
return digest2;
}
public static byte[] ComputeRaw256(ref byte[] input1, ref byte[] input2)
{
var digest1 = new byte[_hasher256.GetDigestSize()];
var digest2 = new byte[_hasher256.GetDigestSize()];
_hasher256.BlockUpdate(input1, 0, input1.Length);
_hasher256.BlockUpdate(input2, 0, input2.Length);
_hasher256.DoFinal(digest1, 0);
_hasher256.BlockUpdate(digest1, 0, digest1.Length);
_hasher256.DoFinal(digest2, 0);
return digest2;
}
}
}