[DOC] Minor corrections

[govpn.git] / doc / transport.texi

diff --git a/doc/transport.texi b/doc/transport.texi
index cdb5950524820360b2d15fa7fb749e473ab154b3..1518d6f95fa59d02324409e9818234416827e5c0 100644 (file)
--- a/doc/transport.texi
+++ b/doc/transport.texi
@@ -2,26 +2,11 @@
 @section Transport protocol
 
 @verbatim
-TAG || ENCRYPTED || NONCE --> PACKET
- ^         ^          ^
- |         |          |
- |         |          +-------------+
- |         |                        |
- |         +-------------+          |
- |                       |          |
- +--< AUTH(AUTH_KEY, ENCRYPTED || NONCE)
-                         ^          ^
-                         |          |
-+------------------------+          |
-|                                   |
-|                   +---------------+
-|                   |
-+--< ENCRYPT(KEY, NONCE, PAYLOAD)
-                    ^       ^
-                    |       |
-                    |       +--< DATA || PAD [|| ZEROS]
-                    |
-                    +--< MAC(MAC_KEY, SERIAL)
+     NONCE = 64bit(MAC(MAC_KEY, SERIAL))
+   PAYLOAD = DATA || PAD [|| ZEROS]
+CIPHERTEXT = ENCRYPT(KEY, NONCE, PAYLOAD)
+       TAG = AUTH(AUTH_KEY, CIPHERTEXT || NONCE)
+   MESSAGE = TAG || CIPHERTEXT || NONCE
 @end verbatim
 
 @code{SERIAL} is message's serial number. Odds are reserved for
@@ -56,9 +41,9 @@ drop when receiving duplicate ones.
 In @ref{Encless, encryptionless mode} this scheme is slightly different:
 
 @verbatim
- PACKET = ENCODED || NONCE
-ENCODED = ENCLESS(DATA || PAD || ZEROS)
   NONCE = MAC(MAC_KEY, SERIAL)
+ENCODED = ENCLESS(DATA || PAD || ZEROS)
+ PACKET = ENCODED || NONCE
 @end verbatim
 
 @code{ENCLESS} is AONT and chaffing function. There is no need in