Update nitrokey crate to 0.4.0

This change finally updates the version of the nitrokey crate that we
consume to 0.4.0. Along with that we update rand_core, one of its
dependencies, to 0.5.1. Further more we add cfg-if in version 0.1.10 and
getrandom in version 0.1.13, both of which are now new (non-development)
dependencies.

Import subrepo nitrokey/:nitrokey at e81057037e9b4f370b64c0a030a725bc6bdfb870
Import subrepo cfg-if/:cfg-if at 4484a6faf816ff8058088ad857b0c6bb2f4b02b2
Import subrepo getrandom/:getrandom at d661aa7e1b8cc80b47dabe3d2135b3b47d2858af
Import subrepo rand/:rand at d877ed528248b52d947e0484364a4e1ae59ca502

1 files changed, 4 insertions, 11 deletions

diff --git a/rand/rand_core/src/impls.rs b/rand/rand_core/src/impls.rs
index 57bdd07..dee4ed1 100644
--- a/rand/rand_core/src/impls.rs
+++ b/rand/rand_core/src/impls.rs
@@ -17,12 +17,11 @@
 //! to/from byte sequences, and since its purpose is reproducibility,
 //! non-reproducible sources (e.g. `OsRng`) need not bother with it.
 
-use core::intrinsics::transmute;
 use core::ptr::copy_nonoverlapping;
 use core::slice;
 use core::cmp::min;
 use core::mem::size_of;
-use RngCore;
+use crate::RngCore;
 
 
 /// Implement `next_u64` via `next_u32`, little-endian order.
@@ -44,21 +43,15 @@ pub fn fill_bytes_via_next<R: RngCore + ?Sized>(rng: &mut R, dest: &mut [u8]) {
     while left.len() >= 8 {
         let (l, r) = {left}.split_at_mut(8);
         left = r;
-        let chunk: [u8; 8] = unsafe {
-            transmute(rng.next_u64().to_le())
-        };
+        let chunk: [u8; 8] = rng.next_u64().to_le_bytes();
         l.copy_from_slice(&chunk);
     }
     let n = left.len();
     if n > 4 {
-        let chunk: [u8; 8] = unsafe {
-            transmute(rng.next_u64().to_le())
-        };
+        let chunk: [u8; 8] = rng.next_u64().to_le_bytes();
         left.copy_from_slice(&chunk[..n]);
     } else if n > 0 {
-        let chunk: [u8; 4] = unsafe {
-            transmute(rng.next_u32().to_le())
-        };
+        let chunk: [u8; 4] = rng.next_u32().to_le_bytes();
         left.copy_from_slice(&chunk[..n]);
     }
 }