[tor-bugs] #16943 [Tor]: Implement prop250 (Random Number Generation During Tor Voting)

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#16943: Implement prop250 (Random Number Generation During Tor Voting)
-------------------------+------------------------------------
 Reporter:  asn          |          Owner:  dgoulet
     Type:  enhancement  |         Status:  needs_review
 Priority:  High         |      Milestone:  Tor: 0.2.8.x-final
Component:  Tor          |        Version:
 Severity:  Normal       |     Resolution:
 Keywords:  tor-hs       |  Actual Points:
Parent ID:  #8244        |         Points:  large
  Sponsor:  SponsorR     |
-------------------------+------------------------------------

Comment (by teor):

 (This is my second comment. Please read both.)

 Compiling with clang (with some extra warnings) yields the following
 integer size complaints:

 Fixed in 185189a in my branch prop250_final_v5 in
 https://github.com/teor2345/tor.git
 (You might want to split this into a series of fixups.)

 next_valid_after_time should be time_t in:
 {{{
 time_t
 get_next_valid_after_time(time_t now)
 {
   int next_valid_after_time;
 }}}

 sr_parse_srv has the only remaining implicit integer conversion warning -
 it would be nice to silence it by casting the result of tor_parse_long()
 to int:
 {{{
 sr_srv_t *
 sr_parse_srv(const smartlist_t *args)
 {
   char *value;
   int num_reveals, ok, ret;
   sr_srv_t *srv = NULL;

   tor_assert(args);

   if (smartlist_len(args) < 2) {
     goto end;
   }

   /* First argument is the number of reveal values */
   num_reveals = tor_parse_long(smartlist_get(args, 0),
                                10, 0, INT32_MAX, &ok, NULL);
 }}}

 ts should be time_t:
 {{{
 static void
 test_encoding(void *arg)
 {
   (void) arg;
   int ret, duper_rand = 42;
   /* Random number is 32 bytes. */
   char raw_rand[32];
   uint64_t ts = 1454333590;
 }}}

 These should be tt_u64_op:
 * `tt_int_op(state->n_protocol_runs, ==, 1);`
 * `tt_int_op(state->n_protocol_runs, ==, 45);`
 * `tt_int_op(state->n_protocol_runs, ==, 46);`

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16943#comment:37>
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