[tor-bugs] #17983 [Tor]: Build tor with -ftrapv by default

Tor Bug Tracker & Wiki blackhole at torproject.org
Tue Apr 12 23:00:57 UTC 2016


#17983: Build tor with -ftrapv by default
-------------------------------+------------------------------------
 Reporter:  teor               |          Owner:  nickm
     Type:  enhancement        |         Status:  needs_review
 Priority:  High               |      Milestone:  Tor: 0.2.9.x-final
Component:  Tor                |        Version:
 Severity:  Normal             |     Resolution:
 Keywords:  TorCoreTeam201604  |  Actual Points:
Parent ID:                     |         Points:  small
 Reviewer:                     |        Sponsor:  SponsorS-can
-------------------------------+------------------------------------
Changes (by nickm):

 * status:  accepted => needs_review


Comment:

 I have a branch called `ftrapv` that makes everything besides donna32
 compile with trapv, and makes donna32 compile with wrapv.

 One more thing before we can merge, though: I want to know the effect of
 ftrapv on whether our generated signed-integer-using crypto is still
 constant-time.  In particular this includes: ed25519 signatures,
 curve25519, keccak, di_ops.c, and I hope not too much else.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17983#comment:22>
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