-\feffusing System;
-using System.Collections.Generic;
-using System.Linq;
+\feff/**
+ * Novacoin classes library
+ * Copyright (C) 2015 Alex D. (balthazar.ad@gmail.com)
-using System.Security.Cryptography;
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+using System;
namespace Novacoin
{
}
public ScryptHash256() : base() { }
- public ScryptHash256(byte[] bytesArray) : base(bytesArray) { }
- public ScryptHash256(IList<byte> bytesList) : base(bytesList) { }
+ public ScryptHash256(byte[] bytes, int offset = 0) : base(bytes, offset) { }
+ public ScryptHash256(ScryptHash256 h) : base(h) { }
/// <summary>
/// Calculate scrypt hash and return new instance of ScryptHash256 class
/// </summary>
/// <param name="inputBytes">Byte sequence to hash</param>
/// <returns>Hashing result instance</returns>
- public static ScryptHash256 Compute256(IEnumerable<byte> inputBytes)
+ public static ScryptHash256 Compute256(byte[] inputBytes)
{
- uint[] V = new uint[(131072 + 63) / sizeof(uint)];
+ var V = new uint[(131072 + 63) / sizeof(uint)];
- byte[] dataBytes = inputBytes.ToArray();
- byte[] keyBytes1 = PBKDF2Sha256GetBytes(128, dataBytes, dataBytes, 1);
- uint[] X = Interop.ToUInt32Array(keyBytes1);
+ var keyBytes1 = CryptoUtils.PBKDF2_Sha256(128, (byte[])inputBytes, (byte[])inputBytes, 1);
+ var X = Interop.ToUInt32Array(keyBytes1);
- uint i, j, k;
- for (i = 0; i < 1024; i++)
+ for (var i = 0; i < 1024; i++)
{
Array.Copy(X, 0, V, i * 32, 32);
xor_salsa8(ref X, 0, ref X, 16);
xor_salsa8(ref X, 16, ref X, 0);
}
- for (i = 0; i < 1024; i++)
+ for (var i = 0; i < 1024; i++)
{
- j = 32 * (X[16] & 1023);
- for (k = 0; k < 32; k++)
+ var j = 32 * (X[16] & 1023);
+ for (var k = 0; k < 32; k++)
+ {
X[k] ^= V[j + k];
+ }
xor_salsa8(ref X, 0, ref X, 16);
xor_salsa8(ref X, 16, ref X, 0);
}
- byte[] xBytes = Interop.LEBytes(X);
- byte[] keyBytes2 = PBKDF2Sha256GetBytes(32, dataBytes, xBytes, 1);
+ var xBytes = Interop.LEBytes(X);
+ var keyBytes2 = CryptoUtils.PBKDF2_Sha256(32, (byte[])inputBytes, xBytes, 1);
return new ScryptHash256(keyBytes2);
}
- private static byte[] PBKDF2Sha256GetBytes(int dklen, byte[] password, byte[] salt, int iterationCount)
- {
- using (var hmac = new HMACSHA256(password))
- {
- int hashLength = hmac.HashSize / 8;
- if ((hmac.HashSize & 7) != 0)
- hashLength++;
- int keyLength = dklen / hashLength;
- if ((long)dklen > (0xFFFFFFFFL * hashLength) || dklen < 0)
- throw new ArgumentOutOfRangeException("dklen");
- if (dklen % hashLength != 0)
- keyLength++;
- byte[] extendedkey = new byte[salt.Length + 4];
- Buffer.BlockCopy(salt, 0, extendedkey, 0, salt.Length);
- using (var ms = new System.IO.MemoryStream())
- {
- for (int i = 0; i < keyLength; i++)
- {
- extendedkey[salt.Length] = (byte)(((i + 1) >> 24) & 0xFF);
- extendedkey[salt.Length + 1] = (byte)(((i + 1) >> 16) & 0xFF);
- extendedkey[salt.Length + 2] = (byte)(((i + 1) >> 8) & 0xFF);
- extendedkey[salt.Length + 3] = (byte)(((i + 1)) & 0xFF);
- byte[] u = hmac.ComputeHash(extendedkey);
- Array.Clear(extendedkey, salt.Length, 4);
- byte[] f = u;
- for (int j = 1; j < iterationCount; j++)
- {
- u = hmac.ComputeHash(u);
- for (int k = 0; k < f.Length; k++)
- {
- f[k] ^= u[k];
- }
- }
- ms.Write(f, 0, f.Length);
- Array.Clear(u, 0, u.Length);
- Array.Clear(f, 0, f.Length);
- }
- byte[] dk = new byte[dklen];
- ms.Position = 0;
- ms.Read(dk, 0, dklen);
- ms.Position = 0;
- for (long i = 0; i < ms.Length; i++)
- {
- ms.WriteByte(0);
- }
- Array.Clear(extendedkey, 0, extendedkey.Length);
- return dk;
- }
- }
- }
-
private static void xor_salsa8(ref uint[] B, int indexB, ref uint[] Bx, int indexBx)
{
uint x00, x01, x02, x03, x04, x05, x06, x07, x08, x09, x10, x11, x12, x13, x14, x15;
git://git.novaco.in / NovacoinLibrary.git / blobdiff