commit 6d968a1507ae074ab17f914522f25b68138efd42 Author: David Goulet dgoulet@torproject.org Date: Mon Oct 17 12:05:09 2016 -0400

prop224: Add a section on the number of introduction points

Acked-by: George Kadianakis desnacked@riseup.net Signed-off-by: David Goulet dgoulet@torproject.org --- proposals/224-rend-spec-ng.txt | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/proposals/224-rend-spec-ng.txt b/proposals/224-rend-spec-ng.txt index 558cf1f..1fe738d 100644 --- a/proposals/224-rend-spec-ng.txt +++ b/proposals/224-rend-spec-ng.txt @@ -37,6 +37,7 @@ Table of contents: 2.3.2. Hidden services and changing shared random values 2.4. Hidden service descriptors: outer wrapper [DESC-OUTER] 2.5. Hidden service descriptors: encryption format [ENCRYPTED-DATA] + 2.5.1. Number of introduction points [NUM_INTRO_POINT] 3. The introduction protocol 3.1. Registering an introduction point [REG_INTRO_POINT] 3.1.1. Extensible ESTABLISH_INTRO protocol. [EST_INTRO] @@ -999,7 +1000,8 @@ Table of contents: able to contact the host. Recognized types are: 'password' and 'ed25519'. See [INTRO-AUTH] below.

- Followed by zero or more introduction points as follows: + Followed by zero or more introduction points as follows (see section + [NUM_INTRO_POINT] below for accepted values):

"introduction-point" SP link-specifiers NL

@@ -1058,6 +1060,21 @@ Table of contents: Other encryption and authentication key formats are allowed; clients should ignore ones they do not recognize.

+2.5.1. Number of introduction points [NUM_INTRO_POINT] + + This section defines how many introduction points an hidden service + descriptor can have at minimum, by default and the maximum: + + Minimum: 0 - Default: 3 - Maximum: 20 + + A value of 0 would means that the service is still alive but doesn't want + to be reached by any client at the moment. Note that the descriptor size + increases considerably as more introduction points are added. + + The reason for a maximum value of 20 is to give enough scalability to tools + like OnionBalance to be able to load balance up to 120 servers (20 x 6 + HSDirs) but also in order for the descriptor size to not overwhelmed hidden + service directories with user defined values that could be gigantic.

3. The introduction protocol