Initial Commit

iTechSharp/srcbc/crypto/tls/TlsNullCipherSuite.cs

@@ -0,0 +1,45 @@
+using System;
+
+namespace Org.BouncyCastle.Crypto.Tls
+{
+	/// <remarks>A NULL CipherSuite in java, this should only be used during handshake.</remarks>
+	public class TlsNullCipherSuite
+		: TlsCipherSuite
+	{
+		internal override void Init(
+			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,
+			TlsProtocolHandler	handler)
+		{
+			byte[] result = new byte[len];
+			Array.Copy(plaintext, offset, result, 0, len);
+			return result;
+		}
+
+		internal override short KeyExchangeAlgorithm
+		{
+			get { return 0; }
+		}
+	}
+}