Update nitrokey crate to 0.3.3

This change updates the nitrokey crate to version 0.3.3. Along with that
change we update rand to 0.6.4 because rand 0.6.1 does not yet contain a
publicly accessible rand_os. Note that we no longer require all
crates in rand's workspace, but only rand_os and rand_core, which is a
significant reduction in the number of lines of code compiled.

Import subrepo nitrokey/:nitrokey at 7cf747d56ddc0b7eeedc3caf36dcc909907a171c
Import subrepo rand/:rand at 4336232dda03323634b10ec72ddf27914aebc3a2

1 files changed, 38 insertions, 0 deletions

diff --git a/rand/rand_os/src/sgx.rs b/rand/rand_os/src/sgx.rs
new file mode 100644
index 0000000..43ae0ef
--- /dev/null
+++ b/rand/rand_os/src/sgx.rs
@@ -0,0 +1,38 @@
+// Copyright 2018 Developers of the Rand project.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use super::OsRngImpl;
+use Error;
+use rdrand::RdRand;
+use rand_core::RngCore;
+use std::fmt::{Debug, Formatter, Result as FmtResult};
+
+#[derive(Clone)]
+pub struct OsRng{
+    gen: RdRand
+}
+
+impl OsRngImpl for OsRng {
+    fn new() -> Result<OsRng, Error> {
+        let rng = RdRand::new()?;
+        Ok(OsRng{ gen: rng })
+    }
+
+    fn fill_chunk(&mut self, dest: &mut [u8]) -> Result<(), Error> {
+        self.gen.try_fill_bytes(dest)
+    }
+
+    fn method_str(&self) -> &'static str { "RDRAND" }
+}
+
+impl Debug for OsRng {
+    fn fmt(&self, f: &mut Formatter) -> FmtResult {
+        f.debug_struct("OsRng")
+            .finish()
+    }
+}