TLS Proposal Draft

beps/bep_draft.rst

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+:BEP: XXX
+:Title: TLS extension
+:Version: $Revision$
+:Last-Modified: $Date$
+:Author: Darren Horrocks <mihael1peklar@gmail.com>
+:Status: Draft
+:Type: Standards Track
+:Content-Type: text/x-rst
+:Created: 11-Nov-2023
+:Post-History: 11-Nov-2023: initial version
+
+
+The TLS Extension introduces a single new command, TLS.
+
+This is enabled by setting the third least significant bit of the
+next to last reserved byte in the BitTorrent handshake:
+
+::
+
+ reserved[6] |= 0x04
+
+The extension is enabled only if both ends of the connection set this bit.
+
+Command
+==================
+
+::
+
+ *TLS*: <len=0x0005> <op=0x20><port>
+
+Sending the command is entirely optional. 
+Disconnecting the current connection and reconnecting via TLS is also optional should the command be sent. 
+No assumptions should be made about the clients ability to handle TLS based connections.
+
+A TLS connection
+==================
+
+A serving peer should have a TLS server certificate where the CN is equal to the PeerID of the serving peer.
+
+A client peer should validate that the PeerID matches the certificate CN.