From a8e714ea12a52230db7e3344b8ac1729ca8cdcd9 Mon Sep 17 00:00:00 2001
From: Nicholas Hastings <skamonkey@gmail.com>
Date: Mon, 12 Nov 2012 10:38:56 -0500
Subject: [PATCH] DepotDownloader: Removed reliance on Classless.Hasher.

---
 DepotDownloader/DepotDownloader.csproj |  4 ----
 DepotDownloader/Util.cs                | 17 +++--------------
 2 files changed, 3 insertions(+), 18 deletions(-)

diff --git a/DepotDownloader/DepotDownloader.csproj b/DepotDownloader/DepotDownloader.csproj
index bd44f5fa..c3ecb3a2 100644
--- a/DepotDownloader/DepotDownloader.csproj
+++ b/DepotDownloader/DepotDownloader.csproj
@@ -56,10 +56,6 @@
     <PlatformTarget>AnyCPU</PlatformTarget>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="Classless.Hasher, Version=0.9.4179.24334, Culture=neutral, PublicKeyToken=25b6bb7f72693b18, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\..\..\SteamKit2\Classless.Hasher.dll</HintPath>
-    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core">
       <RequiredTargetFramework>3.5</RequiredTargetFramework>
diff --git a/DepotDownloader/Util.cs b/DepotDownloader/Util.cs
index cdadb049..4750a971 100644
--- a/DepotDownloader/Util.cs
+++ b/DepotDownloader/Util.cs
@@ -3,7 +3,7 @@ using System.IO;
 using System.Runtime.InteropServices;
 using System.Security.Cryptography;
 using System.Text;
-using Classless.Hasher;
+using SteamKit2;
 
 namespace DepotDownloader
 {
@@ -97,7 +97,7 @@ namespace DepotDownloader
                     tempchunk = chunk;
                 }
                 int adler = BitConverter.ToInt32(AdlerHash(tempchunk), 0);
-                int crc32 = BitConverter.ToInt32(CRCHash(tempchunk), 0);
+                int crc32 = BitConverter.ToInt32(CryptoHelper.CRCHash(tempchunk), 0);
                 if((adler ^ crc32) != checksums[cnt])
                 {
                     fs.Close();
@@ -129,24 +129,13 @@ namespace DepotDownloader
                     tempchunk = chunk;
                 }
                 int adler = BitConverter.ToInt32(AdlerHash(tempchunk), 0);
-                int crc32 = BitConverter.ToInt32(CRCHash(tempchunk), 0);
+                int crc32 = BitConverter.ToInt32(CryptoHelper.CRCHash(tempchunk), 0);
                 checksums[cnt++] = adler ^ crc32;
             }
             fs.Close();
             return checksums;
         }
 
-        public static byte[] CRCHash( byte[] input )
-        {
-            using ( Crc crc = new Crc( CrcParameters.GetParameters( CrcStandard.Crc32Bit ) ) )
-            {
-                byte[] hash = crc.ComputeHash( input );
-                Array.Reverse( hash );
-
-                return hash;
-            }
-        }
-
         public static byte[] AdlerHash(byte[] input)
         {
             uint a = 0, b = 0;