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using System;
namespace sc
{
public class StreamCtx
{
// note do not set these variables manually
// always use StreamCiper.MakeStreamCtx(...)
private IBlockCipher ibc = null;
private byte[] iv = null;
private StreamCipher.Mode mode = StreamCipher.Mode.CBC;
private bool fReadOnly = false;
public int BlockSize()
{
return ibc.BlockSizeInBytes();
}
public IBlockCipher Ibc
{
get{ return ibc; }
set
{
CheckReadOnly();
ibc = value;
}
}
public byte[] IV
{
get{ return iv; }
set
{
CheckReadOnly();
iv = value;
}
}
public StreamCipher.Mode Mode
{
get{ return mode; }
set
{
CheckReadOnly();
mode = value;
}
}
public void MakeReadOnly()
{
this.fReadOnly = true;
}
private void CheckReadOnly()
{
if(this.fReadOnly) throw new Exception();
}
public StreamCtx()
{}
}//EOC
}
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