prop224: Implement HS descriptor fetching

Before the client actually can connect to the service, it has to fetch the descriptor first. As already specified in prop224 section 2.1 and 2.2.6

The client needs to parse the service's master public key from the onion address, derive the blinded public key, and then use that blinded public key to fetch the descriptor from the HSDir.

(Note that, this ticket doesn't implement how to pick the HSDir)

changed milestone to %Tor: 0.3.2.x-final

added component::core tor/tor milestone::Tor: 0.3.2.x-final owner::dgoulet parent::17242 points::7 priority::very high prop224 resolution::fixed severity::normal sponsor::R-must status::closed tor-hs type::enhancement labels

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Summary: prop224: Implementation HS directory fetching to prop224: Implementation HS descriptor fetching

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Summary: prop224: Implementation HS descriptor fetching to prop224: Implement HS descriptor fetching

The code is here https://github.com/haxxpop/tor/pull/3/files

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Status: new to needs_review

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Keywords: N/A deleted, review-group-16 added

Oh we can't merge this yet. We aren't there at all in development because this is client/control port behavior. I'll move that in Accepted state so we don't get confused for the 031 window.

It will make me the owner but it's really a good way for us to not forget it. me and asn are well aware of this ticket and code so we won't forget it :).

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Status: needs_review to accepted
Points: parent to N/A
Owner: haxxpop to dgoulet

Putting myself as the reviewer here but we are not there yet here. This ticket will be examined more deeply when we start client-side implementation.

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Reviewer: N/A to asn

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Keywords: review-group-16 deleted, N/A added

Prioritize prop224 tickets for 031 milestone. They are all "Enhancement".

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Priority: Medium to Very High

prop224 tickets going in 032 for early merge. Decided after Amsterdam meeting.

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Milestone: Tor: 0.3.1.x-final to Tor: 0.3.2.x-final

I pushed an initial branch for this (and #21855 (moved)) in my branch bug21403_draft.

It handles everything from the point where the user requests an onion address, to picking HSDirs, fetching descriptors, storing them in the cache, looking them up, and retrying dir requests when needed. It doesn't do any introduction-related actions.

Please check it out!

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Status: accepted to needs_review

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Points: N/A to 7

And here is the gitlab merge request for bug21403_draft: https://gitlab.com/asn/tor/merge_requests/16

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Keywords: N/A deleted, review-group-18 added

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Reviewer: asn to N/A

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Keywords: review-group-18 deleted, N/A added

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Keywords: N/A deleted, review-group-19 added

Not yet ready for upstream merge.

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Keywords: review-group-19 deleted, N/A added

Ongoing development is now in: ticket21403_032_01.

I've picked up asn's branch and addressed haxxpop review in there.

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Status: needs_review to assigned

All done in #17242 (moved) which was just merged.

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Status: assigned to closed
Resolution: N/A to fixed

closed

changed time estimate to 56h

mentioned in issue #21855 (moved)

moved to tpo/core/tor#21403 (closed)