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authorRobin Krahl <me@robin-krahl.de>2018-12-11 23:50:45 +0100
committerDaniel Mueller <deso@posteo.net>2018-12-17 07:52:13 -0800
commit986ad2f782cf944990e4eda8bf88ea1821233302 (patch)
tree1717075a4eb11861c32e5c45d01e47360fb1264d /rand/src/read.rs
parente97c287c01cf22a1b582a7da9b309b58f3935d0e (diff)
downloadnitrocli-986ad2f782cf944990e4eda8bf88ea1821233302.tar.gz
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Add nitrokey as a dependency to nitrocli
The nitrokey crate provides a simple interface to the Nitrokey Storage and the Nitrokey Pro based on the libnitrokey library developed by Nitrokey UG. The low-level bindings to this library are available in the nitrokey-sys crate. This patch adds version v0.2.1 of the nitrokey crate as a dependency for nitrocli. It includes the indirect dependencies nitrokey-sys (version 3.4.1) and rand (version 0.4.3). Import subrepo nitrokey/:nitrokey at 2eccc96ceec2282b868891befe9cda7f941fbe7b Import subrepo nitrokey-sys/:nitrokey-sys at f1a11ebf72610fb9cf80ac7f9f147b4ba1a5336f Import subrepo rand/:rand at d7d5da49daf7ceb3e5940072940d495cced3a1b3
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diff --git a/rand/src/read.rs b/rand/src/read.rs
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+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// 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. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! A wrapper around any Read to treat it as an RNG.
+
+use std::io::{self, Read};
+use std::mem;
+use Rng;
+
+/// An RNG that reads random bytes straight from a `Read`. This will
+/// work best with an infinite reader, but this is not required.
+///
+/// # Panics
+///
+/// It will panic if it there is insufficient data to fulfill a request.
+///
+/// # Example
+///
+/// ```rust
+/// use rand::{read, Rng};
+///
+/// let data = vec![1, 2, 3, 4, 5, 6, 7, 8];
+/// let mut rng = read::ReadRng::new(&data[..]);
+/// println!("{:x}", rng.gen::<u32>());
+/// ```
+#[derive(Debug)]
+pub struct ReadRng<R> {
+ reader: R
+}
+
+impl<R: Read> ReadRng<R> {
+ /// Create a new `ReadRng` from a `Read`.
+ pub fn new(r: R) -> ReadRng<R> {
+ ReadRng {
+ reader: r
+ }
+ }
+}
+
+impl<R: Read> Rng for ReadRng<R> {
+ fn next_u32(&mut self) -> u32 {
+ // This is designed for speed: reading a LE integer on a LE
+ // platform just involves blitting the bytes into the memory
+ // of the u32, similarly for BE on BE; avoiding byteswapping.
+ let mut buf = [0; 4];
+ fill(&mut self.reader, &mut buf).unwrap();
+ unsafe { *(buf.as_ptr() as *const u32) }
+ }
+ fn next_u64(&mut self) -> u64 {
+ // see above for explanation.
+ let mut buf = [0; 8];
+ fill(&mut self.reader, &mut buf).unwrap();
+ unsafe { *(buf.as_ptr() as *const u64) }
+ }
+ fn fill_bytes(&mut self, v: &mut [u8]) {
+ if v.len() == 0 { return }
+ fill(&mut self.reader, v).unwrap();
+ }
+}
+
+fn fill(r: &mut Read, mut buf: &mut [u8]) -> io::Result<()> {
+ while buf.len() > 0 {
+ match try!(r.read(buf)) {
+ 0 => return Err(io::Error::new(io::ErrorKind::Other,
+ "end of file reached")),
+ n => buf = &mut mem::replace(&mut buf, &mut [])[n..],
+ }
+ }
+ Ok(())
+}
+
+#[cfg(test)]
+mod test {
+ use super::ReadRng;
+ use Rng;
+
+ #[test]
+ fn test_reader_rng_u64() {
+ // transmute from the target to avoid endianness concerns.
+ let v = vec![0u8, 0, 0, 0, 0, 0, 0, 1,
+ 0 , 0, 0, 0, 0, 0, 0, 2,
+ 0, 0, 0, 0, 0, 0, 0, 3];
+ let mut rng = ReadRng::new(&v[..]);
+
+ assert_eq!(rng.next_u64(), 1_u64.to_be());
+ assert_eq!(rng.next_u64(), 2_u64.to_be());
+ assert_eq!(rng.next_u64(), 3_u64.to_be());
+ }
+ #[test]
+ fn test_reader_rng_u32() {
+ let v = vec![0u8, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 3];
+ let mut rng = ReadRng::new(&v[..]);
+
+ assert_eq!(rng.next_u32(), 1_u32.to_be());
+ assert_eq!(rng.next_u32(), 2_u32.to_be());
+ assert_eq!(rng.next_u32(), 3_u32.to_be());
+ }
+ #[test]
+ fn test_reader_rng_fill_bytes() {
+ let v = [1u8, 2, 3, 4, 5, 6, 7, 8];
+ let mut w = [0u8; 8];
+
+ let mut rng = ReadRng::new(&v[..]);
+ rng.fill_bytes(&mut w);
+
+ assert!(v == w);
+ }
+
+ #[test]
+ #[should_panic]
+ fn test_reader_rng_insufficient_bytes() {
+ let mut rng = ReadRng::new(&[][..]);
+ let mut v = [0u8; 3];
+ rng.fill_bytes(&mut v);
+ }
+}