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NotTransform and XorTransform implementations moved to separate file.

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This commit is contained in:
morkt 2016-02-29 08:33:17 +04:00
parent 1c96b01677
commit 8d8dae710d
5 changed files with 102 additions and 72 deletions
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2
ArcFormats/Aoi/ArcBOX.cs
View File

@ -68,7 +68,7 @@ namespace GameRes.Formats.Aoi
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var input = arc.File.CreateStream (entry.Offset, entry.Size);
return new CryptoStream (input, new X.XorTransform (0xB2), CryptoStreamMode.Read);
return new CryptoStream (input, new XorTransform (0xB2), CryptoStreamMode.Read);
}
}
}

33
ArcFormats/ArcCommon.cs
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@ -27,7 +27,6 @@ using GameRes.Utility;
using System;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
namespace GameRes.Formats
{
@ -391,38 +390,6 @@ namespace GameRes.Formats
}
}
public sealed class NotTransform : ICryptoTransform
{
private const int BlockSize = 256;
public bool CanReuseTransform { get { return true; } }
public bool CanTransformMultipleBlocks { get { return true; } }
public int InputBlockSize { get { return BlockSize; } }
public int OutputBlockSize { get { return BlockSize; } }
public int TransformBlock (byte[] inputBuffer, int inputOffset, int inputCount,
byte[] outputBuffer, int outputOffset)
{
for (int i = 0; i < inputCount; ++i)
{
outputBuffer[outputOffset++] = (byte)~inputBuffer[inputOffset+i];
}
return inputCount;
}
public byte[] TransformFinalBlock (byte[] inputBuffer, int inputOffset, int inputCount)
{
byte[] outputBuffer = new byte[inputCount];
TransformBlock (inputBuffer, inputOffset, inputCount, outputBuffer, 0);
return outputBuffer;
}
public void Dispose ()
{
System.GC.SuppressFinalize (this);
}
}
/// <summary>
/// Create stream in TGA format from the given image pixels.
/// </summary>

1
ArcFormats/ArcFormats.csproj
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@ -68,6 +68,7 @@
<Compile Include="ArcCG.cs" />
<Compile Include="ImageLZ.cs" />
<Compile Include="NitroPlus\ArcNPK.cs" />
<Compile Include="SimpleEncryption.cs" />
<Compile Include="Softpal\ArcPAC.cs" />
<Compile Include="Softpal\AudioBGM.cs" />
<Compile Include="Softpal\ImagePGD.cs" />

38
ArcFormats/ArcIKS.cs
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@ -83,42 +83,4 @@ namespace GameRes.Formats.X
return new CryptoStream (input, new XorTransform (key), CryptoStreamMode.Read);
}
}
public sealed class XorTransform : ICryptoTransform
{
private const int BlockSize = 256;
private byte m_key;
public bool CanReuseTransform { get { return true; } }
public bool CanTransformMultipleBlocks { get { return true; } }
public int InputBlockSize { get { return BlockSize; } }
public int OutputBlockSize { get { return BlockSize; } }
public XorTransform (byte key)
{
m_key = key;
}
public int TransformBlock (byte[] inputBuffer, int inputOffset, int inputCount,
byte[] outputBuffer, int outputOffset)
{
for (int i = 0; i < inputCount; ++i)
{
outputBuffer[outputOffset++] = (byte)(m_key ^ inputBuffer[inputOffset+i]);
}
return inputCount;
}
public byte[] TransformFinalBlock (byte[] inputBuffer, int inputOffset, int inputCount)
{
byte[] outputBuffer = new byte[inputCount];
TransformBlock (inputBuffer, inputOffset, inputCount, outputBuffer, 0);
return outputBuffer;
}
public void Dispose ()
{
System.GC.SuppressFinalize (this);
}
}
}

100
ArcFormats/SimpleEncryption.cs Normal file
View File

@ -0,0 +1,100 @@
//! \file SimpleEncryption.cs
//! \date Mon Feb 29 08:19:07 2016
//! \brief Primitive encryption methods implementations.
//
// Copyright (C) 2016 by morkt
//
// 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.
//
using System.IO;
using System.Security.Cryptography;
namespace GameRes.Formats
{
public sealed class NotTransform : ICryptoTransform
{
private const int BlockSize = 256;
public bool CanReuseTransform { get { return true; } }
public bool CanTransformMultipleBlocks { get { return true; } }
public int InputBlockSize { get { return BlockSize; } }
public int OutputBlockSize { get { return BlockSize; } }
public int TransformBlock (byte[] inputBuffer, int inputOffset, int inputCount,
byte[] outputBuffer, int outputOffset)
{
for (int i = 0; i < inputCount; ++i)
{
outputBuffer[outputOffset++] = (byte)~inputBuffer[inputOffset+i];
}
return inputCount;
}
public byte[] TransformFinalBlock (byte[] inputBuffer, int inputOffset, int inputCount)
{
byte[] outputBuffer = new byte[inputCount];
TransformBlock (inputBuffer, inputOffset, inputCount, outputBuffer, 0);
return outputBuffer;
}
public void Dispose ()
{
System.GC.SuppressFinalize (this);
}
}
public sealed class XorTransform : ICryptoTransform
{
private const int BlockSize = 256;
private byte m_key;
public bool CanReuseTransform { get { return true; } }
public bool CanTransformMultipleBlocks { get { return true; } }
public int InputBlockSize { get { return BlockSize; } }
public int OutputBlockSize { get { return BlockSize; } }
public XorTransform (byte key)
{
m_key = key;
}
public int TransformBlock (byte[] inputBuffer, int inputOffset, int inputCount,
byte[] outputBuffer, int outputOffset)
{
for (int i = 0; i < inputCount; ++i)
{
outputBuffer[outputOffset++] = (byte)(m_key ^ inputBuffer[inputOffset+i]);
}
return inputCount;
}
public byte[] TransformFinalBlock (byte[] inputBuffer, int inputOffset, int inputCount)
{
byte[] outputBuffer = new byte[inputCount];
TransformBlock (inputBuffer, inputOffset, inputCount, outputBuffer, 0);
return outputBuffer;
}
public void Dispose ()
{
System.GC.SuppressFinalize (this);
}
}
}