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Document ACKs/NAKs

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svn:r1599
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Nick Mathewson 2004-04-13 00:50:11 +00:00
parent 5af7e27c62
commit 88950f4ac2
1 changed files with 14 additions and 3 deletions
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17
doc/rend-spec.txt
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@ -34,7 +34,7 @@ Tor Rendezvous Spec
In the specifications below, we use the same notation as in
"tor-spec.txt". The service specified here also requires the existence of
an onion routing network as specified in "tor-spec.txt".
an onion routing network as specified in "tor-spec.txt".
H(x) is a SHA1 digest of x.
PKSign(SK,x) is a PKCS.1-padded RSA signature of x with SK.
@ -93,6 +93,9 @@ Tor Rendezvous Spec
35 -- RELAY_INTRODUCE2
36 -- RELAY_RENDEZVOUS1
37 -- RELAY_RENDEZVOUS2
38 -- RELAY_INTRO_ESTABLISHED
39 -- RELAY_RENDEZVOUS_ESTABLISHED
40 -- RELAY_COMMAND_INTRODUCE_ACK
1. The Protocol
@ -154,7 +157,8 @@ Tor Rendezvous Spec
correct given the shared state between Bob's OP and the OR. If either
check fails, the OP discards the cell; otherwise, it associates the
circuit with Bob's public key, and dissociates any other circuits
currently associated with PK.
currently associated with PK. On success, the OR sends Bob a
RELAY_INTRO_ESTABLISHED cell with an empty payload.
1.4. Bob's OP advertises his server descriptor
@ -230,7 +234,8 @@ Tor Rendezvous Spec
Alice's OP.
Upon receiving a RELAY_ESTABLISH_RENDEZVOUS cell, the OR associates the
RC with the circuit that sent it.
RC with the circuit that sent it. It replies to Alice with an empty
RELAY_RENDEZVOUS_ESTABLISHED cell to indicate success.
Alice's OP MUST NOT use the circuit which sent the cell for any purpose
other than rendezvous with the given location-hidden service.
@ -264,6 +269,12 @@ Tor Rendezvous Spec
of the cell in a new RELAY_INTRODUCE2 cell down the corresponding circuit.
(If the PK_ID is unrecognized, the RELAY_INTRODUCE1 cell is discarded.)
After sending the RELAY_INTRODUCE2 cell, the OR replies to Alice with an
empty RELAY_COMMAND_INTRODUCE_ACK cell. If no RELAY_INTRODUCE2 cell can
be sent, the OR replies to Alice with a non-empty cell to indicate an
error. (The semantics of the cell body may be determined later; the
current implementation sends a single '1' byte on failure.)
When Bob's OP receives the RELAY_INTRODUCE2 cell, it decrypts it with
the private key for the corresponding hidden service, and extracts the
rendezvous point's nickname, the rendezvous cookie, and the value of g^x