From 41dd1e80778bb2f65d28569d859dd85255712876 Mon Sep 17 00:00:00 2001
From: Debian Live user <user@localhost.localdomain>
Date: Sun, 29 Oct 2017 21:19:24 +0000
Subject: parseNetCrypto,encodeNetCrypto

---
 src/Network/Tox/Crypto/Transport.hs | 29 ++++++-----------------------
 1 file changed, 6 insertions(+), 23 deletions(-)

(limited to 'src/Network/Tox/Crypto')

diff --git a/src/Network/Tox/Crypto/Transport.hs b/src/Network/Tox/Crypto/Transport.hs
index 4cf6c7a5..09c492ef 100644
--- a/src/Network/Tox/Crypto/Transport.hs
+++ b/src/Network/Tox/Crypto/Transport.hs
@@ -2,6 +2,7 @@
 {-# LANGUAGE ViewPatterns #-}
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE LambdaCase #-}
+{-# LANGUAGE TupleSections #-}
 module Network.Tox.Crypto.Transport
     ( parseNetCrypto
     , encodeNetCrypto
@@ -50,6 +51,7 @@ import Control.Lens
 import Data.Text as T
 import Data.Text.Encoding as T
 import Data.Serialize as S
+import Control.Arrow
 
 
 data NetCrypto
@@ -57,10 +59,12 @@ data NetCrypto
     | NetCrypto (CryptoPacket Encrypted)
 
 parseNetCrypto :: ByteString -> SockAddr -> Either String (NetCrypto, SockAddr)
-parseNetCrypto pkt saddr = Left "TODO: parseNetCrypto"
+parseNetCrypto pkt@(B.uncons -> Just (0x1a,_)) saddr = left ("parseNetCrypto: "++) $ (,saddr) . NetHandshake <$> runGet get pkt
+parseNetCrypto pkt@(B.uncons -> Just (0x1b,_)) saddr = left ("parseNetCrypto: "++) $ (,saddr) . NetCrypto    <$> runGet get pkt
 
 encodeNetCrypto :: NetCrypto -> SockAddr -> (ByteString, SockAddr)
-encodeNetCrypto _ _ = _todo
+encodeNetCrypto (NetHandshake x)  saddr = (B.cons 0x1a (runPut $ put x),saddr)
+encodeNetCrypto (NetCrypto x)     saddr = (B.cons 0x1b (runPut $ put x),saddr)
 
 data Handshake (f :: * -> *) = Handshake
     { handshakeCookie :: Cookie
@@ -940,16 +944,6 @@ data MessageName = Ping -- 0x00
 --     [uint64_t echo id (must be sent back untouched in cookie response)]
 -- ]
 
--- Handshake packet:
---    [uint8_t 26] (0x1a)
---    [Cookie]
---    [nonce (24 bytes)]
---    [Encrypted message containing:
---        [24 bytes base nonce]
---        [session public key of the peer (32 bytes)]
---        [sha512 hash of the entire Cookie sitting outside the encrypted part]
---        [Other Cookie (used by the other to respond to the handshake packet)]
---    ]
 
 -- cookie response packet (161 bytes):
 --
@@ -973,15 +967,4 @@ data MessageName = Ping -- 0x00
 --     should be (NodeId -> Secret) and the cookie-request map should be
 --     (SockAddr -> NodeId)
 
--- Encrypted packets:
---
---  Length    Contents
--- :---------:--------------------------------------------------------------
---  `1`       `uint8_t` (0x1b)
---  `2`       `uint16_t` The last 2 bytes of the nonce used to encrypt this
---  variable   Payload
---
--- The payload is encrypted with the session key and 'base nonce' set by the
--- receiver in their handshake + packet number (starting at 0, big endian math).
-
 
-- 
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