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(NotTransform, XorTransform): derive from ByteTransform abstract class.

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This commit is contained in:
morkt 2016-12-26 15:42:02 +04:00
parent e1a0cca0fd
commit fddee82ab6
1 changed files with 30 additions and 37 deletions
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63
ArcFormats/SimpleEncryption.cs
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@ -28,16 +28,39 @@ using System.Security.Cryptography;
namespace GameRes.Formats
{
public sealed class NotTransform : ICryptoTransform
public abstract class ByteTransform : ICryptoTransform
{
private const int BlockSize = 1;
const int BlockSize = 1;
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,
public abstract int TransformBlock (byte[] inputBuffer, int inputOffset, int inputCount,
byte[] outputBuffer, int outputOffset);
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 ()
{
Dispose (true);
System.GC.SuppressFinalize (this);
}
protected virtual void Dispose (bool disposing)
{
}
}
public sealed class NotTransform : ByteTransform
{
public override int TransformBlock (byte[] inputBuffer, int inputOffset, int inputCount,
byte[] outputBuffer, int outputOffset)
{
for (int i = 0; i < inputCount; ++i)
@ -46,36 +69,18 @@ namespace GameRes.Formats
}
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 ()
public sealed class XorTransform : ByteTransform
{
System.GC.SuppressFinalize (this);
}
}
public sealed class XorTransform : ICryptoTransform
{
private const int BlockSize = 1;
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,
public override int TransformBlock (byte[] inputBuffer, int inputOffset, int inputCount,
byte[] outputBuffer, int outputOffset)
{
for (int i = 0; i < inputCount; ++i)
@ -84,18 +89,6 @@ namespace GameRes.Formats
}
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 class ByteStringEncryptedStream : InputProxyStream