🐛Moved checksums to interface.

Adler32Context.cs

@@ -39,7 +39,7 @@ namespace DiscImageChef.Checksums
     /// <summary>
     ///     Implements the Adler-32 algorithm
     /// </summary>
-    public class Adler32Context
+    public class Adler32Context : IChecksum
     {
         const ushort ADLER_MODULE = 65521;
         ushort sum1, sum2;

CRC16Context.cs

@@ -39,7 +39,7 @@ namespace DiscImageChef.Checksums
     /// <summary>
     ///     Implements a CRC16-CCITT algorithm
     /// </summary>
-    public class Crc16Context
+    public class Crc16Context : IChecksum
     {
         const ushort CRC16_POLY = 0xA001;
         const ushort CRC16_SEED = 0x0000;

CRC32Context.cs

@@ -39,7 +39,7 @@ namespace DiscImageChef.Checksums
     /// <summary>
     ///     Implements a CRC32 algorithm
     /// </summary>
-    public class Crc32Context
+    public class Crc32Context : IChecksum
     {
         const uint CRC32_POLY = 0xEDB88320;
         const uint CRC32_SEED = 0xFFFFFFFF;

CRC64Context.cs

@@ -39,7 +39,7 @@ namespace DiscImageChef.Checksums
     /// <summary>
     ///     Implements a CRC64 (ECMA) algorithm
     /// </summary>
-    public class Crc64Context
+    public class Crc64Context : IChecksum
     {
         const ulong CRC64_POLY = 0xC96C5795D7870F42;
         const ulong CRC64_SEED = 0xFFFFFFFFFFFFFFFF;

DiscImageChef.Checksums.csproj

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -34,6 +34,7 @@
     <Reference Include="System" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="IChecksum.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="SpamSumContext.cs" />
     <Compile Include="Adler32Context.cs" />

FletcherContext.cs

@@ -31,14 +31,14 @@
 // ****************************************************************************/
 
 // Disabled because the speed is abnormally slow
-/*
+
 using System;
 using System.IO;
 using System.Text;
 
 namespace DiscImageChef.Checksums
 {
-    public class Fletcher32Context
+    public class Fletcher32Context : IChecksum
     {
         bool inodd;
         byte oddValue;
@@ -423,4 +423,4 @@ namespace DiscImageChef.Checksums
             return Data(data, (uint)data.Length, out hash);
         }
     }
-}*/
+}

IChecksum.cs

@@ -0,0 +1,65 @@
+// /***************************************************************************
+// The Disc Image Chef
+// ----------------------------------------------------------------------------
+//
+// Filename       : IChecksum.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : Checksums.
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     Provides an interface for implementing checksums and hashes.
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This library is free software; you can redistribute it and/or modify
+//     it under the terms of the GNU Lesser General Public License as
+//     published by the Free Software Foundation; either version 2.1 of the
+//     License, or (at your option) any later version.
+//
+//     This library 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
+//     Lesser General Public License for more details.
+//
+//     You should have received a copy of the GNU Lesser General Public
+//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2011-2018 Natalia Portillo
+// ****************************************************************************/
+
+namespace DiscImageChef.Checksums
+{
+    public interface IChecksum
+    {
+        /// <summary>
+        ///     Initializes the algorithm
+        /// </summary>
+        void Init();
+
+        /// <summary>
+        ///     Updates the hash with data.
+        /// </summary>
+        /// <param name="data">Data buffer.</param>
+        /// <param name="len">Length of buffer to hash.</param>
+        void Update(byte[] data, uint len);
+
+        /// <summary>
+        ///     Updates the hash with data.
+        /// </summary>
+        /// <param name="data">Data buffer.</param>
+        void Update(byte[] data);
+
+        /// <summary>
+        ///     Returns a byte array of the hash value.
+        /// </summary>
+        byte[] Final();
+
+        /// <summary>
+        ///     Returns a hexadecimal representation of the hash value.
+        /// </summary>
+        string End();
+    }
+}

MD5Context.cs

@@ -39,7 +39,7 @@ namespace DiscImageChef.Checksums
     /// <summary>
     ///     Wraps up .NET MD5 implementation to a Init(), Update(), Final() context.
     /// </summary>
-    public class Md5Context
+    public class Md5Context : IChecksum
     {
         MD5 md5Provider;
 

RIPEMD160Context.cs

@@ -39,7 +39,7 @@ namespace DiscImageChef.Checksums
     /// <summary>
     ///     Wraps up .NET RIPEMD160 implementation to a Init(), Update(), Final() context.
     /// </summary>
-    public class Ripemd160Context
+    public class Ripemd160Context : IChecksum
     {
         RIPEMD160 ripemd160Provider;
 

SHA1Context.cs

@@ -39,7 +39,7 @@ namespace DiscImageChef.Checksums
     /// <summary>
     ///     Wraps up .NET SHA1 implementation to a Init(), Update(), Final() context.
     /// </summary>
-    public class Sha1Context
+    public class Sha1Context : IChecksum
     {
         SHA1 sha1Provider;
 

SHA256Context.cs

@@ -39,7 +39,7 @@ namespace DiscImageChef.Checksums
     /// <summary>
     ///     Wraps up .NET SHA256 implementation to a Init(), Update(), Final() context.
     /// </summary>
-    public class Sha256Context
+    public class Sha256Context : IChecksum
     {
         SHA256 sha256Provider;
 

SHA384Context.cs

@@ -39,7 +39,7 @@ namespace DiscImageChef.Checksums
     /// <summary>
     ///     Wraps up .NET SHA384 implementation to a Init(), Update(), Final() context.
     /// </summary>
-    public class Sha384Context
+    public class Sha384Context : IChecksum
     {
         SHA384 sha384Provider;
 

SHA512Context.cs

@@ -39,7 +39,7 @@ namespace DiscImageChef.Checksums
     /// <summary>
     ///     Wraps up .NET SHA512 implementation to a Init(), Update(), Final() context.
     /// </summary>
-    public class Sha512Context
+    public class Sha512Context : IChecksum
     {
         SHA512 sha512Provider;
 

SpamSumContext.cs

@@ -47,7 +47,7 @@ namespace DiscImageChef.Checksums
     /// <summary>
     ///     Implements the SpamSum fuzzy hashing algorithm.
     /// </summary>
-    public class SpamSumContext
+    public class SpamSumContext : IChecksum
     {
         const uint ROLLING_WINDOW = 7;
         const uint MIN_BLOCKSIZE = 3;