starting tunnel messages

lib/crypto/tunnel.go

@@ -5,7 +5,7 @@ import (
 	"crypto/cipher"
 )
 
-type TunnelData [1024]byte
+type TunnelData [1028]byte
 
 // A symetric key for encrypting tunnel messages
 type TunnelKey [32]byte

lib/tunnel/message.go

@@ -7,14 +7,33 @@ import (
 
 type TunnelID uint32
 
-// data sent down a tunnel
-type TunnelMessage crypto.TunnelData
+type EncryptedTunnelMessage crypto.TunnelData
 
-func (tm TunnelMessage) ID() (tid TunnelID) {
+func (tm EncryptedTunnelMessage) ID() (tid TunnelID) {
 	tid = TunnelID(binary.BigEndian.Uint32(tm[:4]))
 	return
 }
 
-func (tm TunnelMessage) IV() crypto.TunnelIV {
+func (tm EncryptedTunnelMessage) IV() crypto.TunnelIV {
 	return tm[4:20]
 }
+
+func (tm EncryptedTunnelMessage) Data() crypto.TunnelIV {
+	return tm[24:]
+}
+
+type DecryptedTunnelMessage [1028]byte
+
+func (decrypted_tunnel_message DecryptedTunnelMessage) ID() TunnelID {
+	return TunnelID(binary.BigEndian.Uint32(
+		decrypted_tunnel_message[:4],
+	))
+}
+
+func (decrypted_tunnel_message DecryptedTunnelMessage) IV() crypto.TunnelIV {
+	return decrypted_tunnel_message[4:20]
+}
+
+func (decrypted_tunnel_message DecryptedTunnelMessage) Checksum() crypto.TunnelIV {
+	return decrypted_tunnel_message[24:28]
+}

lib/tunnel/message_test.go

@@ -0,0 +1,6 @@
+package tunnel
+
+import (
+//"github.com/stretchr/testify/assert"
+//"testing"
+)