Initial Commit

2023-06-21 12:46:23 -04:00
commit c70248a520
1352 changed files with 336780 additions and 0 deletions
--- a/iTechSharp/srcbc/crypto/tls/RecordStream.cs
+++ b/iTechSharp/srcbc/crypto/tls/RecordStream.cs
@@ -0,0 +1,107 @@
+using System;
+using System.IO;
+
+namespace Org.BouncyCastle.Crypto.Tls
+{
+	/// <remarks>An implementation of the TLS 1.0 record layer.</remarks>
+	public class RecordStream
+	{
+		private TlsProtocolHandler handler;
+		private Stream inStr;
+		private Stream outStr;
+		internal CombinedHash hash1;
+		internal CombinedHash hash2;
+		internal TlsCipherSuite readSuite = null;
+		internal TlsCipherSuite writeSuite = null;
+
+		internal RecordStream(
+			TlsProtocolHandler	handler,
+			Stream				inStr,
+			Stream				outStr)
+		{
+			this.handler = handler;
+			this.inStr = inStr;
+			this.outStr = outStr;
+			hash1 = new CombinedHash();
+			hash2 = new CombinedHash();
+			this.readSuite = new TlsNullCipherSuite();
+			this.writeSuite = this.readSuite;
+		}
+
+		public void ReadData()
+		{
+			short type = TlsUtilities.ReadUint8(inStr);
+			TlsUtilities.CheckVersion(inStr, handler);
+			int size = TlsUtilities.ReadUint16(inStr);
+			byte[] buf = DecodeAndVerify(type, inStr, size);
+			handler.ProcessData(type, buf, 0, buf.Length);
+
+		}
+
+		internal byte[] DecodeAndVerify(
+			short	type,
+			Stream	inStr,
+			int		len)
+		{
+			byte[] buf = new byte[len];
+			TlsUtilities.ReadFully(buf, inStr);
+			byte[] result = readSuite.DecodeCiphertext(type, buf, 0, buf.Length, handler);
+			return result;
+		}
+
+		internal void WriteMessage(
+			short	type,
+			byte[]	message,
+			int		offset,
+			int		len)
+		{
+			if (type == 22)
+			{
+				hash1.BlockUpdate(message, offset, len);
+				hash2.BlockUpdate(message, offset, len);
+			}
+			byte[] ciphertext = writeSuite.EncodePlaintext(type, message, offset, len);
+			byte[] writeMessage = new byte[ciphertext.Length + 5];
+			TlsUtilities.WriteUint8(type, writeMessage, 0);
+			TlsUtilities.WriteUint8((short)3, writeMessage, 1);
+			TlsUtilities.WriteUint8((short)1, writeMessage, 2);
+			TlsUtilities.WriteUint16(ciphertext.Length, writeMessage, 3);
+			Array.Copy(ciphertext, 0, writeMessage, 5, ciphertext.Length);
+			outStr.Write(writeMessage, 0, writeMessage.Length);
+			outStr.Flush();
+		}
+
+		internal void Close()
+		{
+			IOException e = null;
+			try
+			{
+				inStr.Close();
+			}
+			catch (IOException ex)
+			{
+				e = ex;
+			}
+
+			try
+			{
+				// NB: This is harmless if outStr == inStr
+				outStr.Close();
+			}
+			catch (IOException ex)
+			{
+				e = ex;
+			}
+
+			if (e != null)
+			{
+				throw e;
+			}
+		}
+
+		internal void Flush()
+		{
+			outStr.Flush();
+		}
+	}
+}