TlsNullCipherSuite.cs :  » PDF » iTextSharp » Org » BouncyCastle » Crypto » Tls » C# / CSharp Open Source

using System;

namespace Org.BouncyCastle.Crypto.Tls{
  /// <remarks>A NULL CipherSuite in java, this should only be used during handshake.</remarks>
  internal class TlsNullCipherSuite
    : TlsCipherSuite
  {
    internal override void Init(
      TlsProtocolHandler handler,
      byte[]  ms,
      byte[]  cr,
      byte[]  sr)
    {
      throw new TlsException("Sorry, init of TLS_NULL_WITH_NULL_NULL is forbidden");
    }

    internal override byte[] EncodePlaintext(
      short        type,
      byte[]        plaintext,
      int          offset,
      int          len)
    {
      byte[] result = new byte[len];
      Array.Copy(plaintext, offset, result, 0, len);
      return result;
    }

    internal override byte[] DecodeCiphertext(
      short        type,
      byte[]        plaintext,
      int          offset,
      int          len)
    {
      byte[] result = new byte[len];
      Array.Copy(plaintext, offset, result, 0, len);
      return result;
    }

    internal override short KeyExchangeAlgorithm
    {
      get { return 0; }
    }
  }
}