Update nitrokey crate to 0.2.3

This change updates the nitrokey crate to version 0.2.3. This version
bumps the rand crate used to 0.6.1, which in turn requires an additional
set of dependencies.

Import subrepo nitrokey/:nitrokey at b3e2adc5bb1300441ca74cc7672617c042f3ea31
Import subrepo rand/:rand at 73613ff903512e9503e41cc8ba9eae76269dc598
Import subrepo rustc_version/:rustc_version at 0294f2ba2018bf7be672abd53db351ce5055fa02
Import subrepo semver-parser/:semver-parser at 750da9b11a04125231b1fb293866ca036845acee
Import subrepo semver/:semver at 5eb6db94fa03f4d5c64a625a56188f496be47598

8 files changed, 538 insertions, 0 deletions

diff --git a/rand/rand_xorshift/CHANGELOG.md b/rand/rand_xorshift/CHANGELOG.md
new file mode 100644
index 0000000..9a896a5
--- /dev/null
+++ b/rand/rand_xorshift/CHANGELOG.md
@@ -0,0 +1,8 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [0.1.0] - 2018-07-16
+- Pulled out of the Rand crate
diff --git a/rand/rand_xorshift/COPYRIGHT b/rand/rand_xorshift/COPYRIGHT
new file mode 100644
index 0000000..468d907
--- /dev/null
+++ b/rand/rand_xorshift/COPYRIGHT
@@ -0,0 +1,12 @@
+Copyrights in the Rand project are retained by their contributors. No
+copyright assignment is required to contribute to the Rand project.
+
+For full authorship information, see the version control history.
+
+Except as otherwise noted (below and/or in individual files), Rand is
+licensed under the Apache License, Version 2.0 <LICENSE-APACHE> or
+<http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+<LICENSE-MIT> or <http://opensource.org/licenses/MIT>, at your option.
+
+The Rand project includes code from the Rust project
+published under these same licenses.
diff --git a/rand/rand_xorshift/Cargo.toml b/rand/rand_xorshift/Cargo.toml
new file mode 100644
index 0000000..b763bfc
--- /dev/null
+++ b/rand/rand_xorshift/Cargo.toml
@@ -0,0 +1,31 @@
+[package]
+name = "rand_xorshift"
+version = "0.1.0"
+authors = ["The Rand Project Developers", "The Rust Project Developers"]
+license = "MIT/Apache-2.0"
+readme = "README.md"
+repository = "https://github.com/rust-random/rand"
+documentation = "https://rust-random.github.io/rand/rand_xorshift"
+homepage = "https://crates.io/crates/rand_xorshift"
+description = """
+Xorshift random number generator
+"""
+keywords = ["random", "rng", "xorshift"]
+categories = ["algorithms", "no-std"]
+
+[badges]
+travis-ci = { repository = "rust-random/rand" }
+appveyor = { repository = "rust-random/rand" }
+
+[features]
+serde1 = ["serde", "serde_derive"]
+
+[dependencies]
+rand_core = { path = "../rand_core", version = ">=0.2, <0.4", default-features=false }
+serde = { version = "1", optional = true }
+serde_derive = { version = "^1.0.38", optional = true }
+
+[dev-dependencies]
+# This is for testing serde, unfortunately we can't specify feature-gated dev
+# deps yet, see: https://github.com/rust-lang/cargo/issues/1596
+bincode = "1"
diff --git a/rand/rand_xorshift/LICENSE-APACHE b/rand/rand_xorshift/LICENSE-APACHE
new file mode 100644
index 0000000..17d7468
--- /dev/null
+++ b/rand/rand_xorshift/LICENSE-APACHE
@@ -0,0 +1,201 @@
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diff --git a/rand/rand_xorshift/LICENSE-MIT b/rand/rand_xorshift/LICENSE-MIT
new file mode 100644
index 0000000..d93b5ba
--- /dev/null
+++ b/rand/rand_xorshift/LICENSE-MIT
@@ -0,0 +1,26 @@
+Copyright 2018 Developers of the Rand project
+Copyright (c) 2014 The Rust Project Developers
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
diff --git a/rand/rand_xorshift/README.md b/rand/rand_xorshift/README.md
new file mode 100644
index 0000000..573ee12
--- /dev/null
+++ b/rand/rand_xorshift/README.md
@@ -0,0 +1,45 @@
+# rand_xorshift
+
+[![Build Status](https://travis-ci.org/rust-random/rand.svg)](https://travis-ci.org/rust-random/rand)
+[![Build Status](https://ci.appveyor.com/api/projects/status/github/rust-random/rand?svg=true)](https://ci.appveyor.com/project/rust-random/rand)
+[![Latest version](https://img.shields.io/crates/v/rand_xorshift.svg)](https://crates.io/crates/rand_xorshift)
+[![Book](https://img.shields.io/badge/book-master-yellow.svg)](https://rust-random.github.io/book/)
+[![API](https://img.shields.io/badge/api-master-yellow.svg)](https://rust-random.github.io/rand/rand_xorshift)
+[![API](https://docs.rs/rand_xorshift/badge.svg)](https://docs.rs/rand_xorshift)
+[![Minimum rustc version](https://img.shields.io/badge/rustc-1.22+-lightgray.svg)](https://github.com/rust-random/rand#rust-version-requirements)
+
+Implements the Xorshift random number generator.
+
+The Xorshift[^1] algorithm is not suitable for cryptographic purposes
+but is very fast. If you do not know for sure that it fits your
+requirements, use a more secure one such as `StdRng` or `OsRng`.
+
+[^1]: Marsaglia, George (July 2003).
+      ["Xorshift RNGs"](https://www.jstatsoft.org/v08/i14/paper).
+      *Journal of Statistical Software*. Vol. 8 (Issue 14).
+
+Links:
+
+-   [API documentation (master)](https://rust-random.github.io/rand/rand_xorshift)
+-   [API documentation (docs.rs)](https://docs.rs/rand_xorshift)
+-   [Changelog](CHANGELOG.md)
+
+[rand]: https://crates.io/crates/rand
+
+
+## Crate Features
+
+`rand_xorshift` is `no_std` compatible. It does not require any functionality
+outside of the `core` lib, thus there are no features to configure.
+
+The `serde1` feature includes implementations of `Serialize` and `Deserialize`
+for the included RNGs.
+
+
+## License
+
+`rand_xorshift` is distributed under the terms of both the MIT license and the
+Apache License (Version 2.0).
+
+See [LICENSE-APACHE](LICENSE-APACHE) and [LICENSE-MIT](LICENSE-MIT), and
+[COPYRIGHT](COPYRIGHT) for details.
diff --git a/rand/rand_xorshift/src/lib.rs b/rand/rand_xorshift/src/lib.rs
new file mode 100644
index 0000000..aad74e4
--- /dev/null
+++ b/rand/rand_xorshift/src/lib.rs
@@ -0,0 +1,123 @@
+// 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.
+
+//! The xorshift random number generator.
+
+#![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk.png",
+       html_favicon_url = "https://www.rust-lang.org/favicon.ico",
+       html_root_url = "https://rust-random.github.io/rand/")]
+
+#![deny(missing_docs)]
+#![deny(missing_debug_implementations)]
+
+#![no_std]
+
+extern crate rand_core;
+
+#[cfg(feature="serde1")] extern crate serde;
+#[cfg(feature="serde1")] #[macro_use] extern crate serde_derive;
+
+use core::num::Wrapping as w;
+use core::{fmt, slice};
+use rand_core::{RngCore, SeedableRng, Error, impls, le};
+
+/// An Xorshift random number generator.
+///
+/// The Xorshift[^1] algorithm is not suitable for cryptographic purposes
+/// but is very fast. If you do not know for sure that it fits your
+/// requirements, use a more secure one such as `StdRng` or `OsRng`.
+///
+/// [^1]: Marsaglia, George (July 2003).
+///       ["Xorshift RNGs"](https://www.jstatsoft.org/v08/i14/paper).
+///       *Journal of Statistical Software*. Vol. 8 (Issue 14).
+#[derive(Clone)]
+#[cfg_attr(feature="serde1", derive(Serialize,Deserialize))]
+pub struct XorShiftRng {
+    x: w<u32>,
+    y: w<u32>,
+    z: w<u32>,
+    w: w<u32>,
+}
+
+// Custom Debug implementation that does not expose the internal state
+impl fmt::Debug for XorShiftRng {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "XorShiftRng {{}}")
+    }
+}
+
+impl RngCore for XorShiftRng {
+    #[inline]
+    fn next_u32(&mut self) -> u32 {
+        let x = self.x;
+        let t = x ^ (x << 11);
+        self.x = self.y;
+        self.y = self.z;
+        self.z = self.w;
+        let w_ = self.w;
+        self.w = w_ ^ (w_ >> 19) ^ (t ^ (t >> 8));
+        self.w.0
+    }
+
+    #[inline]
+    fn next_u64(&mut self) -> u64 {
+        impls::next_u64_via_u32(self)
+    }
+
+    #[inline]
+    fn fill_bytes(&mut self, dest: &mut [u8]) {
+        impls::fill_bytes_via_next(self, dest)
+    }
+
+    fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error> {
+        Ok(self.fill_bytes(dest))
+    }
+}
+
+impl SeedableRng for XorShiftRng {
+    type Seed = [u8; 16];
+
+    fn from_seed(seed: Self::Seed) -> Self {
+        let mut seed_u32 = [0u32; 4];
+        le::read_u32_into(&seed, &mut seed_u32);
+
+        // Xorshift cannot be seeded with 0 and we cannot return an Error, but
+        // also do not wish to panic (because a random seed can legitimately be
+        // 0); our only option is therefore to use a preset value.
+        if seed_u32.iter().all(|&x| x == 0) {
+            seed_u32 = [0xBAD_5EED, 0xBAD_5EED, 0xBAD_5EED, 0xBAD_5EED];
+        }
+
+        XorShiftRng {
+            x: w(seed_u32[0]),
+            y: w(seed_u32[1]),
+            z: w(seed_u32[2]),
+            w: w(seed_u32[3]),
+        }
+    }
+
+    fn from_rng<R: RngCore>(mut rng: R) -> Result<Self, Error> {
+        let mut seed_u32 = [0u32; 4];
+        loop {
+            unsafe {
+                let ptr = seed_u32.as_mut_ptr() as *mut u8;
+
+                let slice = slice::from_raw_parts_mut(ptr, 4 * 4);
+                rng.try_fill_bytes(slice)?;
+            }
+            if !seed_u32.iter().all(|&x| x == 0) { break; }
+        }
+
+        Ok(XorShiftRng {
+            x: w(seed_u32[0]),
+            y: w(seed_u32[1]),
+            z: w(seed_u32[2]),
+            w: w(seed_u32[3]),
+        })
+    }
+}
diff --git a/rand/rand_xorshift/tests/mod.rs b/rand/rand_xorshift/tests/mod.rs
new file mode 100644
index 0000000..8374b64
--- /dev/null
+++ b/rand/rand_xorshift/tests/mod.rs
@@ -0,0 +1,92 @@
+extern crate rand_core;
+extern crate rand_xorshift;
+#[cfg(all(feature="serde1", test))] extern crate bincode;
+
+use rand_core::{RngCore, SeedableRng};
+use rand_xorshift::XorShiftRng;
+
+#[test]
+fn test_xorshift_construction() {
+    // Test that various construction techniques produce a working RNG.
+    let seed = [1,2,3,4, 5,6,7,8, 9,10,11,12, 13,14,15,16];
+    let mut rng1 = XorShiftRng::from_seed(seed);
+    assert_eq!(rng1.next_u64(), 4325440999699518727);
+
+    let _rng2 = XorShiftRng::from_rng(rng1).unwrap();
+    // Note: we cannot test the state of _rng2 because from_rng does not
+    // fix Endianness. This is allowed in the trait specification.
+}
+
+#[test]
+fn test_xorshift_true_values() {
+    let seed = [16,15,14,13, 12,11,10,9, 8,7,6,5, 4,3,2,1];
+    let mut rng = XorShiftRng::from_seed(seed);
+
+    let mut results = [0u32; 9];
+    for i in results.iter_mut() { *i = rng.next_u32(); }
+    let expected: [u32; 9] = [
+        2081028795, 620940381, 269070770, 16943764, 854422573, 29242889,
+        1550291885, 1227154591, 271695242];
+    assert_eq!(results, expected);
+
+    let mut results = [0u64; 9];
+    for i in results.iter_mut() { *i = rng.next_u64(); }
+    let expected: [u64; 9] = [
+        9247529084182843387, 8321512596129439293, 14104136531997710878,
+        6848554330849612046, 343577296533772213, 17828467390962600268,
+        9847333257685787782, 7717352744383350108, 1133407547287910111];
+    assert_eq!(results, expected);
+
+    let mut results = [0u8; 32];
+    rng.fill_bytes(&mut results);
+    let expected = [102, 57, 212, 16, 233, 130, 49, 183,
+                    158, 187, 44, 203, 63, 149, 45, 17,
+                    117, 129, 131, 160, 70, 121, 158, 155,
+                    224, 209, 192, 53, 10, 62, 57, 72];
+    assert_eq!(results, expected);
+}
+
+#[test]
+fn test_xorshift_zero_seed() {
+    // Xorshift does not work with an all zero seed.
+    // Assert it does not panic.
+    let seed = [0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0];
+    let mut rng = XorShiftRng::from_seed(seed);
+    let a = rng.next_u64();
+    let b = rng.next_u64();
+    assert!(a != 0);
+    assert!(b != a);
+}
+
+#[test]
+fn test_xorshift_clone() {
+    let seed = [1,2,3,4, 5,5,7,8, 8,7,6,5, 4,3,2,1];
+    let mut rng1 = XorShiftRng::from_seed(seed);
+    let mut rng2 = rng1.clone();
+    for _ in 0..16 {
+        assert_eq!(rng1.next_u64(), rng2.next_u64());
+    }
+}
+
+#[cfg(feature="serde1")]
+#[test]
+fn test_xorshift_serde() {
+    use bincode;
+    use std::io::{BufWriter, BufReader};
+
+    let seed = [1,2,3,4, 5,6,7,8, 9,10,11,12, 13,14,15,16];
+    let mut rng = XorShiftRng::from_seed(seed);
+
+    let buf: Vec<u8> = Vec::new();
+    let mut buf = BufWriter::new(buf);
+    bincode::serialize_into(&mut buf, &rng).expect("Could not serialize");
+
+    let buf = buf.into_inner().unwrap();
+    let mut read = BufReader::new(&buf[..]);
+    let mut deserialized: XorShiftRng = bincode::deserialize_from(&mut read)
+        .expect("Could not deserialize");
+
+    for _ in 0..16 {
+        assert_eq!(rng.next_u64(), deserialized.next_u64());
+    }
+}