Use the crypto random functions instead of `rand()`.

Presumably the uses of `rand()` were fine because they were not used in
security-sensitive places, but having to think about whether a crappy RNG
is acceptable in each situation requires effort that could better be
spent elsewhere.

Also, this means that once we have a custom deterministic RNG for
testing, that RNG is used everywhere, so all the code is deterministic.

It also allowed us to delete a system-specific function that wasn't used
anywhere except in a call to `srand()`.

1 files changed, 0 insertions, 3 deletions

diff --git a/toxcore/mono_time.h b/toxcore/mono_time.h
index 63e0f49d..97759560 100644
--- a/toxcore/mono_time.h
+++ b/toxcore/mono_time.h
@@ -22,9 +22,6 @@ void unix_time_update(void);
 uint64_t unix_time(void);
 int is_timeout(uint64_t timestamp, uint64_t timeout);
 
-/* return current UNIX time in microseconds (us). */
-uint64_t current_time_actual(void);
-
 /* return current monotonic time in milliseconds (ms). */
 uint64_t current_time_monotonic(void);