[tor-bugs] #17242 [Tor]: Implement client and service support for proposal 224

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#17242: Implement client and service support for proposal 224
-------------------------+------------------------------
 Reporter:  dgoulet      |          Owner:
     Type:  enhancement  |         Status:  needs_review
 Priority:  Medium       |      Milestone:  Tor: 0.2.???
Component:  Tor          |        Version:
 Severity:  Normal       |     Resolution:
 Keywords:  tor-hs       |  Actual Points:
Parent ID:  #12424       |         Points:  large
  Sponsor:               |
-------------------------+------------------------------
Changes (by teor):

 * status:  new => needs_review


Comment:

 Replying to [comment:7 nickm]:
 > Merged, but one thing:
 >
 > Should the H(salt) you added be H("derive-salt" | salt) ?
 (93f47f4f4e7614d4b3debfe9b5f3a22bfe5d64b1)

 Since the input is random, ioerror thinks that a distinguishing value is
 unnecessary, and I tend to agree. I think it also has performance
 implications if we are hashing more than 256 bits into a 256 bit hash.

 >
 > And should it be explicitly said that it's truncated to 16 bytes?

 Yes, let's make that clear.

 I've pushed fixups to rend-ng-descriptors on my github.
 They're based on the last commit in the series to modify the relevant part
 of the spec, so they should fixup cleanly.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17242#comment:8>
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