[tor-bugs] #19980 [Core Tor/Tor]: Use OpenSSL 1.1.0 X5519 in Tor when available (if it's good)

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#19980: Use OpenSSL 1.1.0 X5519 in Tor when available (if it's good)
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 Reporter:  nickm                                |          Owner:
     Type:  enhancement                          |         Status:  new
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  unspecified
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  openssl110 performance tor-relay     |  Actual Points:
  tor-client crypto                              |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by isis):

 Replying to [comment:7 yawning]:
 > Does it have a table driven scalar basepoint multiply?

 Yes, in `crypto/ec/curve25519.c`:

 {{{
 /* k25519Precomp[i][j] = (j+1)*256^i*B */
 static const ge_precomp k25519Precomp[32][8] = {
 […]
 }
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19980#comment:8>
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