The next generation of the Teknik Services. Written in ASP.NET.
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using Org.BouncyCastle.Crypto;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Teknik.Utilities
{
public class AESCryptoStream : Stream
{
private Stream _Inner;
private IBufferedCipher _Cipher;
public AESCryptoStream(Stream stream, bool encrypt, byte[] key, byte[] iv, string mode, string padding)
{
_Inner = stream;
_Cipher = AES.CreateCipher(encrypt, key, iv, mode, padding);
}
public override int Read(byte[] buffer, int offset, int count)
{
if (_Inner != null && CanRead)
{
int bytesRead = 0;
// Process the cipher
int processed = AES.ProcessCipherBlock(_Cipher, _Inner, count, buffer, offset, out bytesRead);
if (processed < bytesRead)
{
// Finalize the cipher
processed += AES.FinalizeCipherBlock(_Cipher, buffer, processed + offset);
}
return bytesRead;
}
return -1;
}
public override void Write(byte[] buffer, int offset, int count)
{
if (_Inner != null && CanWrite)
{
// Process the cipher
byte[] output = new byte[count];
int processed = _Cipher.ProcessBytes(buffer, offset, count, output, 0);
// Finalize the cipher
AES.FinalizeCipherBlock(_Cipher, output, processed);
_Inner.Write(output, 0, count);
}
}
public override bool CanRead
{
get
{
if (_Inner != null)
{
return _Inner.CanRead;
}
return false;
}
}
public override bool CanSeek
{
get
{
if (_Inner != null)
{
return _Inner.CanSeek;
}
return false;
}
}
public override bool CanWrite
{
get
{
if (_Inner != null)
{
return _Inner.CanWrite;
}
return false;
}
}
public override long Length
{
get
{
if (_Inner != null)
{
return _Inner.Length;
}
return -1;
}
}
public override long Position
{
get
{
if (_Inner != null)
{
return _Inner.Position;
}
return -1;
}
set
{
if (_Inner != null)
{
_Inner.Position = value;
}
}
}
public override void Flush()
{
if (_Inner != null)
{
_Inner.Flush();
}
}
public override long Seek(long offset, SeekOrigin origin)
{
if (_Inner != null)
{
return _Inner.Seek(offset, origin);
}
return -1;
}
public override void SetLength(long value)
{
if (_Inner != null)
{
_Inner.SetLength(value);
}
}
}
}