[tor-bugs] #21871 [Core Tor/Tor]: prop224: Change descriptor format for legacy encryption key

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#21871: prop224: Change descriptor format for legacy encryption key
-----------------------------+------------------------------------
 Reporter:  dgoulet          |          Owner:  dgoulet
     Type:  enhancement      |         Status:  needs_review
 Priority:  Medium           |      Milestone:  Tor: 0.3.1.x-final
Component:  Core Tor/Tor     |        Version:
 Severity:  Normal           |     Resolution:
 Keywords:  tor-hs, prop224  |  Actual Points:
Parent ID:  #21888           |         Points:  3
 Reviewer:                   |        Sponsor:  SponsorR-must
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Changes (by dgoulet):

 * status:  needs_revision => needs_review


Comment:

 Here is a version 2. I had to squash two commits together because the
 first one (which was the remove private key from hs_descriptor.h) didn't
 make sense at all with the next commit which changes the descriptor format
 of encryption keys. It was actually just more complicated to deal with
 both in two commits and not adding any useful semantic.

 I've fixed one of the comment in the merge request, the two others are in
 discussion mode I guess.

 Torspec: `ticket21871_01`
 Tor code: `ticket21871_031_02`
 Gitlab: https://gitlab.com/dgoulet/tor/merge_requests/25

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21871#comment:6>
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