mirror of
https://github.com/crskycode/GARbro.git
synced 2024-11-27 07:34:00 +08:00
(Blowfish): moved to GameRes.Cryptography namespace.
(BlowfishDecryptor): ICryptoTransform interface implementation. (BlowfishStream): removed as unused.
This commit is contained in:
morkt
parent
837c203e4b
commit
db0d39f863
@ -25,10 +25,11 @@
|
||||
|***************************************************************************/
|
||||
|
||||
using System;
|
||||
using System.Text;
|
||||
using System.IO;
|
||||
using System.Security.Cryptography;
|
||||
using GameRes.Utility;
|
||||
|
||||
namespace Simias.Encryption
|
||||
namespace GameRes.Cryptography
|
||||
{
|
||||
/// <summary>
|
||||
/// Class that provides blowfish encryption.
|
||||
@ -285,11 +286,6 @@ namespace Simias.Encryption
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
///
|
||||
/// </summary>
|
||||
/// <param name="x"></param>
|
||||
/// <returns></returns>
|
||||
private uint F(uint x)
|
||||
{
|
||||
ushort a;
|
||||
@ -443,235 +439,61 @@ namespace Simias.Encryption
|
||||
}
|
||||
}
|
||||
|
||||
public class BlowfishStream : Stream
|
||||
{
|
||||
class CBState : IAsyncResult
|
||||
{
|
||||
internal AsyncCallback callback;
|
||||
internal object state;
|
||||
internal byte[] buffer;
|
||||
internal IAsyncResult result;
|
||||
internal CBState(AsyncCallback callback, object state, byte[] buffer)
|
||||
/// <summary>
|
||||
/// ICryptoTransform implementation for use with CryptoStream.
|
||||
/// </summary>
|
||||
public sealed class BlowfishDecryptor : ICryptoTransform
|
||||
{
|
||||
Blowfish m_bf;
|
||||
|
||||
public const int BlockSize = 8;
|
||||
|
||||
public bool CanTransformMultipleBlocks { get { return true; } }
|
||||
public bool CanReuseTransform { get { return true; } }
|
||||
public int InputBlockSize { get { return BlockSize; } }
|
||||
public int OutputBlockSize { get { return BlockSize; } }
|
||||
|
||||
public BlowfishDecryptor (Blowfish bf)
|
||||
{
|
||||
m_bf = bf;
|
||||
}
|
||||
|
||||
public int TransformBlock (byte[] inBuffer, int offset, int count, byte[] outBuffer, int outOffset)
|
||||
{
|
||||
for (int i = 0; i < count; i += BlockSize)
|
||||
{
|
||||
this.callback = callback;
|
||||
this.state = state;
|
||||
this.buffer = buffer;
|
||||
}
|
||||
#region IAsyncResult Members
|
||||
uint xl = LittleEndian.ToUInt32 (inBuffer, offset+i);
|
||||
uint xr = LittleEndian.ToUInt32 (inBuffer, offset+i+4);
|
||||
m_bf.Decipher (ref xl, ref xr);
|
||||
LittleEndian.Pack (xl, outBuffer, outOffset+i);
|
||||
LittleEndian.Pack (xr, outBuffer, outOffset+i+4);
|
||||
}
|
||||
return count;
|
||||
}
|
||||
|
||||
public object AsyncState
|
||||
{
|
||||
get
|
||||
{
|
||||
return state;
|
||||
}
|
||||
}
|
||||
static readonly byte[] EmptyArray = new byte[0];
|
||||
|
||||
public bool CompletedSynchronously
|
||||
{
|
||||
get
|
||||
{
|
||||
return result.CompletedSynchronously;
|
||||
}
|
||||
}
|
||||
public byte[] TransformFinalBlock (byte[] inBuffer, int offset, int count)
|
||||
{
|
||||
if (0 == count)
|
||||
return EmptyArray;
|
||||
if (0 != count % BlockSize)
|
||||
throw new InvalidDataException ("Non-padded block in Blowfish encrypted stream");
|
||||
var output = new byte[count];
|
||||
TransformBlock (inBuffer, offset, count, output, 0);
|
||||
return output;
|
||||
}
|
||||
|
||||
public System.Threading.WaitHandle AsyncWaitHandle
|
||||
{
|
||||
get
|
||||
{
|
||||
return result.AsyncWaitHandle;
|
||||
}
|
||||
}
|
||||
|
||||
public bool IsCompleted
|
||||
{
|
||||
get
|
||||
{
|
||||
return result.IsCompleted;
|
||||
}
|
||||
}
|
||||
|
||||
#endregion
|
||||
}
|
||||
|
||||
public enum Target
|
||||
{
|
||||
Encrypted,
|
||||
Normal
|
||||
};
|
||||
|
||||
Stream stream;
|
||||
Blowfish bf;
|
||||
Target target;
|
||||
|
||||
BlowfishStream(Stream stream, Blowfish bf, Target target)
|
||||
{
|
||||
this.stream = stream;
|
||||
this.bf = bf;
|
||||
this.target = target;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Returns true if the stream support reads.
|
||||
/// </summary>
|
||||
public override bool CanRead
|
||||
{
|
||||
get {return stream.CanRead;}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Returns true is the stream supports seeks.
|
||||
/// </summary>
|
||||
public override bool CanSeek
|
||||
{
|
||||
get {return stream.CanSeek;}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Returns true if the stream supports writes.
|
||||
/// </summary>
|
||||
public override bool CanWrite
|
||||
{
|
||||
get {return stream.CanWrite;}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Returns the length of the stream.
|
||||
/// </summary>
|
||||
public override long Length
|
||||
{
|
||||
get {return stream.Length;}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Gets or Sets the posistion of the stream.
|
||||
/// </summary>
|
||||
public override long Position
|
||||
{
|
||||
get {return stream.Position;}
|
||||
set {stream.Position = value;}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Flushes the stream.
|
||||
/// </summary>
|
||||
public override void Flush()
|
||||
{
|
||||
stream.Flush();
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Read data from the stream and encrypt it.
|
||||
/// </summary>
|
||||
/// <param name="buffer">The buffer to read into.</param>
|
||||
/// <param name="offset">The offset in the buffer to begin storing data.</param>
|
||||
/// <param name="count">The number of bytes to read.</param>
|
||||
/// <returns></returns>
|
||||
public override int Read(byte[] buffer, int offset, int count)
|
||||
{
|
||||
int bytesRead = stream.Read(buffer, offset, count);
|
||||
if (target == Target.Normal)
|
||||
bf.Encipher(buffer, bytesRead);
|
||||
else
|
||||
bf.Decipher(buffer, bytesRead);
|
||||
return bytesRead;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Write data to the stream after decrypting it.
|
||||
/// </summary>
|
||||
/// <param name="buffer">The buffer containing the data to write.</param>
|
||||
/// <param name="offset">The offset in the buffer where the data begins.</param>
|
||||
/// <param name="count">The number of bytes to write.</param>
|
||||
public override void Write(byte[] buffer, int offset, int count)
|
||||
{
|
||||
if (target == Target.Normal)
|
||||
bf.Decipher(buffer, count);
|
||||
else
|
||||
bf.Encipher(buffer, count);
|
||||
stream.Write(buffer, offset, count);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
///
|
||||
/// </summary>
|
||||
/// <param name="buffer"></param>
|
||||
/// <param name="offset"></param>
|
||||
/// <param name="count"></param>
|
||||
/// <param name="callback"></param>
|
||||
/// <param name="state"></param>
|
||||
/// <returns></returns>
|
||||
public override IAsyncResult BeginRead(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
|
||||
{
|
||||
CBState cbs = new CBState(callback, state, buffer);
|
||||
cbs.result = base.BeginRead (buffer, offset, count, new AsyncCallback(ReadComplete), cbs);
|
||||
return cbs;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
///
|
||||
/// </summary>
|
||||
/// <param name="asyncResult"></param>
|
||||
/// <returns></returns>
|
||||
public override int EndRead(IAsyncResult asyncResult)
|
||||
{
|
||||
CBState cbs = (CBState)asyncResult.AsyncState;
|
||||
int bytesRead = base.EndRead (cbs.result);
|
||||
if (target == Target.Normal)
|
||||
bf.Encipher(cbs.buffer, bytesRead);
|
||||
else
|
||||
bf.Decipher(cbs.buffer, bytesRead);
|
||||
return bytesRead;
|
||||
}
|
||||
|
||||
|
||||
/// <summary>
|
||||
/// The Read has completed.
|
||||
/// </summary>
|
||||
/// <param name="result">The result of the async write.</param>
|
||||
private void ReadComplete(IAsyncResult result)
|
||||
{
|
||||
CBState cbs = (CBState)result.AsyncState;
|
||||
cbs.callback(cbs);
|
||||
}
|
||||
|
||||
|
||||
/// <summary>
|
||||
///
|
||||
/// </summary>
|
||||
/// <param name="buffer"></param>
|
||||
/// <param name="offset"></param>
|
||||
/// <param name="count"></param>
|
||||
/// <param name="callback"></param>
|
||||
/// <param name="state"></param>
|
||||
/// <returns></returns>
|
||||
public override IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
|
||||
{
|
||||
if (target == Target.Normal)
|
||||
bf.Decipher(buffer, count);
|
||||
else
|
||||
bf.Encipher(buffer, count);
|
||||
return base.BeginWrite (buffer, offset, count, callback, state);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Move the current stream posistion to the specified location.
|
||||
/// </summary>
|
||||
/// <param name="offset">The offset from the origin to seek.</param>
|
||||
/// <param name="origin">The origin to seek from.</param>
|
||||
/// <returns>The new position.</returns>
|
||||
public override long Seek(long offset, SeekOrigin origin)
|
||||
{
|
||||
return stream.Seek(offset, origin);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Set the stream length.
|
||||
/// </summary>
|
||||
/// <param name="value">The length to set.</param>
|
||||
public override void SetLength(long value)
|
||||
{
|
||||
stream.SetLength(value);
|
||||
}
|
||||
}
|
||||
#region IDisposable implementation
|
||||
bool _disposed = false;
|
||||
public void Dispose ()
|
||||
{
|
||||
if (!_disposed)
|
||||
{
|
||||
_disposed = true;
|
||||
}
|
||||
GC.SuppressFinalize (this);
|
||||
}
|
||||
#endregion
|
||||
}
|
||||
}
|
||||
|
||||
@ -30,7 +30,6 @@ using System.Text;
|
||||
using System.ComponentModel;
|
||||
using System.ComponentModel.Composition;
|
||||
using System.Collections.Generic;
|
||||
using Simias.Encryption;
|
||||
using System.Runtime.InteropServices;
|
||||
using GameRes.Formats.Strings;
|
||||
using GameRes.Formats.Properties;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user