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Merge pull request #664 from raistlinthewiz/develop
scrypt-n implementation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| // sample implementation: https://github.com/zone117x/node-stratum-pool/blob/master/lib/algoProperties.js#L53 | ||
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| var timeTable = { | ||
| hash: function() { | ||
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| var timeTable = { | ||
| "2048": 1389306217, | ||
| "4096": 1456415081, | ||
| "8192": 1506746729, | ||
| "16384": 1557078377, | ||
| "32768": 1657741673, | ||
| "65536": 1859068265, | ||
| "131072": 2060394857, | ||
| "262144": 1722307603, | ||
| "524288": 1769642992 | ||
| }; | ||
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| console.log("timeTable"); | ||
| console.log(timeTable); | ||
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| var sorted = Object.keys(timeTable).sort(); | ||
| console.log("sorted"); | ||
| console.log(sorted); | ||
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| var reversed = sorted.reverse(); | ||
| console.log("reversed"); | ||
| console.log(reversed); | ||
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| var now = Date.now() / 1000; | ||
| console.log("now: " + now); | ||
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| var filtered = reversed.filter(function(nKey) { | ||
| return now > timeTable[nKey]; | ||
| }); | ||
| console.log("filtered"); | ||
| console.log(filtered); | ||
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| var n = filtered[0]; | ||
| var nInt = parseInt(n); | ||
| console.log("n=" + n); | ||
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| var nFactor = Math.log(nInt) / Math.log(2); | ||
| console.log("nFactor=" + nFactor); | ||
| } | ||
| }; | ||
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| timeTable.hash(); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| #region License | ||
| // | ||
| // CoiniumServ - Crypto Currency Mining Pool Server Software | ||
| // Copyright (C) 2013 - 2014, CoiniumServ Project - http://www.coinium.org | ||
| // http://www.coiniumserv.com - https://github.com/CoiniumServ/CoiniumServ | ||
| // | ||
| // This software is dual-licensed: you can redistribute it and/or modify | ||
| // it under the terms of the GNU 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 General Public License for more details. | ||
| // | ||
| // For the terms of this license, see licenses/gpl_v3.txt. | ||
| // | ||
| // Alternatively, you can license this software under a commercial | ||
| // license or white-label it as set out in licenses/commercial.txt. | ||
| // | ||
| #endregion | ||
|
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||
| using System; | ||
| using System.Linq; | ||
| using System.Collections.Generic; | ||
| using CoiniumServ.Coin.Config; | ||
| using CoiniumServ.Utils.Helpers; | ||
| using CryptSharp.Utility; | ||
| using JsonConfig; | ||
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| namespace CoiniumServ.Algorithms.Implementations | ||
| { | ||
| public sealed class ScryptN : HashAlgorithmBase | ||
| { | ||
| /// <summary> | ||
| /// R parameter - block size. | ||
| /// </summary> | ||
| private readonly int _r; | ||
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| /// <summary> | ||
| /// P - parallelization parameter - a large value of p can increase computational | ||
| /// cost of scrypt without increasing the memory usage. | ||
| /// </summary> | ||
| private readonly int _p; | ||
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| // default time-table for scrypt-n | ||
| private readonly Dictionary<Int32, UInt64> _defaultTimeTable = new Dictionary<Int32, UInt64> | ||
| { | ||
| {2048, 1389306217}, | ||
| {4096, 1456415081}, | ||
| {8192, 1506746729}, | ||
| {16384, 1557078377}, | ||
| {32768, 1657741673}, | ||
| {65536, 1859068265}, | ||
| {131072, 2060394857}, | ||
| {262144, 1722307603}, | ||
| {524288, 1769642992}, | ||
| }; | ||
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| private Dictionary<Int32, UInt64> _timeTable; // timeTable for the coin. | ||
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| public ScryptN(ICoinConfig coinConfig) | ||
| { | ||
| _r = 1; | ||
| _p = 1; | ||
| Multiplier = (UInt32)Math.Pow(2, 16); | ||
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| InitTimeTable(coinConfig.Extra.timeTable); // init the timeTable for the coin. | ||
| } | ||
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| private void InitTimeTable(dynamic table) | ||
| { | ||
| _timeTable = new Dictionary<int, ulong>(); | ||
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| if (table is NullExceptionPreventer) // if we are not provided a timeTable | ||
| _timeTable = _defaultTimeTable; // use the default table. | ||
| else | ||
| { | ||
| // else use the table provided by the coin configuration within extra.timeTable section. | ||
| foreach (KeyValuePair<string, object> pair in table) | ||
| { | ||
| _timeTable.Add(Int32.Parse(pair.Key), UInt64.Parse(pair.Value.ToString())); | ||
| } | ||
| } | ||
| } | ||
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| public override byte[] Hash(byte[] input, dynamic config) | ||
| { | ||
| var now = (UInt64)TimeHelpers.NowInUnixTimestamp(); | ||
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| var index = _timeTable.OrderBy(x => x.Key).First(x => x.Value < now).Key; | ||
| var nFactor = (int)(Math.Log(index) / Math.Log(2)); | ||
| var n = 1 << nFactor; | ||
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| return SCrypt.ComputeDerivedKey(input, input, n, _r, _p, null, 32); | ||
| } | ||
| } | ||
| } |
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