/**
* Generate a synthetic time using our distribution parameters.
*
* The return value will be within the [q_lo, q_hi) quantile points
* on the CDF.
*/
build_time_t
circuit_build_times_generate_sample(circuit_build_times_t *cbt,
double q_lo, double q_hi)
{
double randval = crypto_rand_double();
build_time_t ret;
double u;
/* Generate between [q_lo, q_hi) */
/*XXXX This is what nextafter is supposed to be for; we should use it on the
* platforms that support it. */
q_hi -= 1.0/(INT32_MAX);
tor_assert(q_lo >= 0);
tor_assert(q_hi < 1);
tor_assert(q_lo < q_hi);
u = q_lo + (q_hi-q_lo)*randval;
tor_assert(0 <= u && u < 1.0);
/* circuit_build_times_calculate_timeout returns <= INT32_MAX */
ret = (build_time_t)
tor_lround(circuit_build_times_calculate_timeout(cbt, u));
tor_assert(ret > 0);
return ret;
}
/** Run unit tests for our random number generation function and its wrappers.
*/
static void
test_crypto_rng(void *arg)
{
int i, j, allok;
char data1[100], data2[100];
double d;
char *h=NULL;
/* Try out RNG. */
(void)arg;
tt_assert(! crypto_seed_rng());
crypto_rand(data1, 100);
crypto_rand(data2, 100);
tt_mem_op(data1,OP_NE, data2,100);
allok = 1;
for (i = 0; i < 100; ++i) {
uint64_t big;
char *host;
j = crypto_rand_int(100);
if (j < 0 || j >= 100)
allok = 0;
big = crypto_rand_uint64(UINT64_C(1)<<40);
if (big >= (UINT64_C(1)<<40))
allok = 0;
big = crypto_rand_uint64(UINT64_C(5));
if (big >= 5)
allok = 0;
d = crypto_rand_double();
tt_assert(d >= 0);
tt_assert(d < 1.0);
host = crypto_random_hostname(3,8,"www.",".onion");
if (strcmpstart(host,"www.") ||
strcmpend(host,".onion") ||
strlen(host) < 13 ||
strlen(host) > 18)
allok = 0;
tor_free(host);
}
/* Make sure crypto_random_hostname clips its inputs properly. */
h = crypto_random_hostname(20000, 9000, "www.", ".onion");
tt_assert(! strcmpstart(h,"www."));
tt_assert(! strcmpend(h,".onion"));
tt_int_op(63+4+6, OP_EQ, strlen(h));
tt_assert(allok);
done:
tor_free(h);
}
/** Run unit tests for our random number generation function and its wrappers.
*/
static void
test_crypto_rng(void)
{
int i, j, allok;
char data1[100], data2[100];
double d;
/* Try out RNG. */
test_assert(! crypto_seed_rng(0));
crypto_rand(data1, 100);
crypto_rand(data2, 100);
test_memneq(data1,data2,100);
allok = 1;
for (i = 0; i < 100; ++i) {
uint64_t big;
char *host;
j = crypto_rand_int(100);
if (j < 0 || j >= 100)
allok = 0;
big = crypto_rand_uint64(U64_LITERAL(1)<<40);
if (big >= (U64_LITERAL(1)<<40))
allok = 0;
big = crypto_rand_uint64(U64_LITERAL(5));
if (big >= 5)
allok = 0;
d = crypto_rand_double();
test_assert(d >= 0);
test_assert(d < 1.0);
host = crypto_random_hostname(3,8,"www.",".onion");
if (strcmpstart(host,"www.") ||
strcmpend(host,".onion") ||
strlen(host) < 13 ||
strlen(host) > 18)
allok = 0;
tor_free(host);
}
test_assert(allok);
done:
;
}
