diff options
Diffstat (limited to 'rend-spec-v3.txt')
| -rw-r--r-- | rend-spec-v3.txt | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/rend-spec-v3.txt b/rend-spec-v3.txt index 6a120eb..fac1395 100644 --- a/rend-spec-v3.txt +++ b/rend-spec-v3.txt @@ -1548,8 +1548,17 @@ Table of contents: authentication key. The EXT_FIELD_TYPE, EXT_FIELD_LEN, EXT_FIELD entries are reserved for - future extensions to the introduction protocol. Extensions with + extensions to the introduction protocol. Extensions with unrecognized EXT_FIELD_TYPE values must be ignored. + (`EXT_FIELD_LEN` may be zero, in which case EXT_FIELD is absent.) + + Unless otherwise specified in the documentation for an extension type: + * Each extension type SHOULD be sent only once in a message. + * Parties MUST ignore any occurrences all occurrences of an extension + with a given type after the first such occurrence. + * Extensions SHOULD be sent in numerically ascending order by type. + (The above extension sorting and multiplicity rules are only defaults; + they may be overridden in the descriptions of individual extensions.) The HANDSHAKE_AUTH field contains the MAC of all earlier fields in the cell using as its key the shared per-circuit material ("KH") @@ -1685,6 +1694,10 @@ Table of contents: Older versions of Tor send back an empty INTRO_ESTABLISHED cell instead. Services must accept an empty INTRO_ESTABLISHED cell from a legacy relay. + The same rules for multiplicity, ordering, and handling unknown types + apply to the extension fields here as described [EST_INTRO] above. + + 3.2. Sending an INTRODUCE1 cell to the introduction point. [SEND_INTRO1] In order to participate in the introduction protocol, a client must @@ -1737,6 +1750,10 @@ Table of contents: INTRODUCE2 cell with exactly the same contents to the service, and sends an INTRODUCE_ACK response to the client. + The same rules for multiplicity, ordering, and handling unknown types + apply to the extension fields here as described [EST_INTRO] above. + + 3.2.2. INTRODUCE_ACK cell format. [INTRO_ACK] An INTRODUCE_ACK cell has the following fields: @@ -1755,6 +1772,10 @@ Table of contents: [00 02] -- Bad message format [00 03] -- Can't relay cell to service + The same rules for multiplicity, ordering, and handling unknown types + apply to the extension fields here as described [EST_INTRO] above. + + 3.3. Processing an INTRODUCE2 cell at the hidden service. [PROCESS_INTRO2] Upon receiving an INTRODUCE2 cell, the hidden service host checks whether @@ -1831,6 +1852,10 @@ Table of contents: shared key with the hidden service client. * A set of shared keys to use for end-to-end encryption. + The same rules for multiplicity, ordering, and handling unknown types + apply to the extension fields here as described [EST_INTRO] above. + + 3.3.1. Introduction handshake encryption requirements [INTRO-HANDSHAKE-REQS] When decoding the encrypted information in an INTRODUCE2 cell, a |