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Added workaround so SHA3 works under Mono, and enabling SHA3

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This commit is contained in:
Natalia Portillo
2015-02-05 05:03:44 +00:00
parent 01f512b978
commit eefd828ada
4 changed files with 99 additions and 20 deletions
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92
SharpHash/Checksums/SHA3Context.cs
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@@ -22,6 +22,7 @@
using System.Text;
using System.IO;
using SHA3;
using System;
namespace SharpHash.Checksums
{
@@ -30,14 +31,14 @@ namespace SharpHash.Checksums
/// </summary>
public class SHA3Context
{
SHA3Unmanaged _sha3Provider;
SHA3WorkaroundForMono _sha3Provider;
/// <summary>
/// Initializes the SHA3 hash provider
/// </summary>
public void Init()
{
_sha3Provider = new SHA3Unmanaged(512);
_sha3Provider = new SHA3WorkaroundForMono(512);
}
/// <summary>
@@ -64,7 +65,7 @@ namespace SharpHash.Checksums
/// </summary>
public byte[] Final()
{
_sha3Provider.TransformFinalBlock(new byte[0], 0, 0);
_sha3Provider.WorkaroundTransformFinalBlock(new byte[0], 0, 0);
return _sha3Provider.Hash;
}
@@ -73,7 +74,7 @@ namespace SharpHash.Checksums
/// </summary>
public string End()
{
_sha3Provider.TransformFinalBlock(new byte[0], 0, 0);
_sha3Provider.WorkaroundTransformFinalBlock(new byte[0], 0, 0);
StringBuilder sha3Output = new StringBuilder();
for (int i = 0; i < _sha3Provider.Hash.Length; i++)
@@ -142,5 +143,88 @@ namespace SharpHash.Checksums
return Data(data, (uint)data.Length, out hash);
}
}
// This is a workaround for Mono
// Mono calls Initialize() on HashAlgorithm.cs, making SHA3.Hash be null
// .NET Framework does not
//
// This snippet then does detect if running under Mono, if so it is doing
// the same code, but without that call.
// Under .NET Framework, just calls base().
//
// Following snippet:
//
// System.Security.Cryptography.HashAlgorithm.cs
//
// Authors:
// Matthew S. Ford (Matthew.S.Ford@Rose-Hulman.Edu)
// Sebastien Pouliot (sebastien@ximian.com)
//
// Copyright 2001 by Matthew S. Ford.
// Portions (C) 2002 Motus Technologies Inc. (http://www.motus.com)
// Copyright (C) 2004-2006 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
public class SHA3WorkaroundForMono : SHA3Managed
{
public SHA3WorkaroundForMono(int hashBitLength) : base (hashBitLength)
{ }
public byte[] WorkaroundTransformFinalBlock (byte[] inputBuffer, int inputOffset, int inputCount)
{
// Check for Mono
Type t = Type.GetType ("Mono.Runtime");
// Not under Mono
if (t == null)
{
return base.TransformFinalBlock(inputBuffer, inputOffset, inputCount);
}
// Under Mono
else
{
if (inputBuffer == null)
throw new ArgumentNullException("inputBuffer");
if (inputCount < 0)
throw new ArgumentException("inputCount");
// ordered to avoid possible integer overflow
if (inputOffset > inputBuffer.Length - inputCount)
{
throw new ArgumentException("inputOffset + inputCount",
"Overflow");
}
byte[] outputBuffer = new byte [inputCount];
// note: other exceptions are handled by Buffer.BlockCopy
Buffer.BlockCopy(inputBuffer, inputOffset, outputBuffer, 0, inputCount);
HashCore(inputBuffer, inputOffset, inputCount);
HashValue = HashFinal();
// Offending line
//Initialize ();
return outputBuffer;
}
}
}
}

16
SharpHash/Program.cs
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@@ -160,9 +160,9 @@ namespace SharpHash
Checksums.SHA512Context sha512Context = new Checksums.SHA512Context();
sha512Context.Init();
// Console.WriteLine("Initializing SHA3-512...");
// Checksums.SHA3Context sha3Context = new Checksums.SHA3Context();
// sha3Context.Init();
Console.WriteLine("Initializing SHA3-512...");
Checksums.SHA3Context sha3Context = new Checksums.SHA3Context();
sha3Context.Init();
Console.WriteLine("Initializing SpamSum...");
Checksums.SpamSumContext spamsumContext = new Checksums.SpamSumContext();
@@ -190,7 +190,7 @@ namespace SharpHash
sha256Context.Update(dataBuffer);
sha384Context.Update(dataBuffer);
sha512Context.Update(dataBuffer);
// sha3Context.Update(dataBuffer);
sha3Context.Update(dataBuffer);
spamsumContext.Update(dataBuffer);
}
@@ -209,7 +209,7 @@ namespace SharpHash
sha256Context.Update(dataBuffer);
sha384Context.Update(dataBuffer);
sha512Context.Update(dataBuffer);
// sha3Context.Update(dataBuffer);
sha3Context.Update(dataBuffer);
spamsumContext.Update(dataBuffer);
}
else
@@ -229,7 +229,7 @@ namespace SharpHash
sha256Context.Update(dataBuffer);
sha384Context.Update(dataBuffer);
sha512Context.Update(dataBuffer);
// sha3Context.Update(dataBuffer);
sha3Context.Update(dataBuffer);
spamsumContext.Update(dataBuffer);
}
@@ -245,7 +245,7 @@ namespace SharpHash
byte[] sha256Hash = sha256Context.Final();
byte[] sha384Hash = sha384Context.Final();
byte[] sha512Hash = sha512Context.Final();
// byte[] sha3Hash = sha3Context.Final();
byte[] sha3Hash = sha3Context.Final();
string spamsumHash = spamsumContext.End();
Console.WriteLine();
@@ -270,7 +270,7 @@ namespace SharpHash
Console.WriteLine("SHA2-256: {0}", stringify(sha256Hash));
Console.WriteLine("SHA2-384: {0}", stringify(sha384Hash));
Console.WriteLine("SHA2-512: {0}", stringify(sha512Hash));
// Console.WriteLine("SHA3-512: {0}", stringify(sha3Hash));
Console.WriteLine("SHA3-512: {0}", stringify(sha3Hash));
Console.WriteLine("SpamSum: {0}", spamsumHash);
fileStream.Close();

6
SharpHash/SharpHash.csproj
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@@ -31,8 +31,8 @@
</PropertyGroup>
<ItemGroup>
<Reference Include="System" />
<Reference Include="SHA3">
<HintPath>..\packages\SHA3.0.9.2\lib\net40\SHA3.dll</HintPath>
<Reference Include="SHA3Managed">
<HintPath>..\packages\SHA3.0.9.2\lib\net40\SHA3Managed.dll</HintPath>
</Reference>
</ItemGroup>
<ItemGroup>
@@ -67,7 +67,6 @@
</MonoDevelop>
</ProjectExtensions>
<ItemGroup>
<None Include="packages.config" />
<None Include="..\README.md">
<Link>README.md</Link>
</None>
@@ -77,5 +76,6 @@
<None Include="..\LICENSE">
<Link>LICENSE</Link>
</None>
<None Include="packages.config" />
</ItemGroup>
</Project>

5
SharpHash/packages.config
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@@ -1,5 +0,0 @@
<?xml version="1.0" encoding="utf-8"?>
<packages>
<package id="HashLib" version="2.0.1" targetFramework="net45" />
<package id="SHA3" version="0.9.2" targetFramework="net45" />
</packages>