Re: [tor-bugs] #19872 [Core Tor/Tor]: Introduce prefixed sign/verify functions

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#19872: Introduce prefixed sign/verify functions
-------------------------------------------------+-------------------------
 Reporter:  asn                                  |          Owner:
     Type:  task                                 |         Status:
                                                 |  needs_revision
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.2.???
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  029-proposed, tor-hs,                |  Actual Points:  0.3
  TorCoreTeam201608                              |
Parent ID:                                       |         Points:  0.3
 Reviewer:                                       |        Sponsor:
                                                 |  SponsorR-can
-------------------------------------------------+-------------------------
Changes (by dgoulet):

 * status:  needs_review => needs_revision


Comment:

 Two small things:

 * Need documentation on the returned value that is 0 on success and -1 on
 error. Either that or we document the return value of `ed25519_sign()`
 which has none documented in `crypto_ed25519.c`.

 * There is lots of `strlen(prefix_str)`, could be nicer to do it once and
 then use it. Also, is there a chance that we would like to use this for a
 non string prefix? Would it be bad to just go with `uint8_t *` and pass
 the prefix len as param as well even though it's a string?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19872#comment:3>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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