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authorDaniel Mueller <deso@posteo.net>2019-01-02 21:14:10 -0800
committerDaniel Mueller <deso@posteo.net>2019-01-02 21:14:10 -0800
commitecf3474223ca3d16a10f12dc2272e3b0ed72c1bb (patch)
tree03134a683791176b49ef5c92e8d6acd24c3b5a9b /rand/src/prng/isaac.rs
parent686f61b75055ecb02baf9d9449525ae447a3bed1 (diff)
downloadnitrocli-ecf3474223ca3d16a10f12dc2272e3b0ed72c1bb.tar.gz
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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
Diffstat (limited to 'rand/src/prng/isaac.rs')
-rw-r--r--rand/src/prng/isaac.rs328
1 files changed, 0 insertions, 328 deletions
diff --git a/rand/src/prng/isaac.rs b/rand/src/prng/isaac.rs
deleted file mode 100644
index cf5eb67..0000000
--- a/rand/src/prng/isaac.rs
+++ /dev/null
@@ -1,328 +0,0 @@
-// 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.
-
-//! The ISAAC random number generator.
-
-#![allow(non_camel_case_types)]
-
-use core::slice;
-use core::iter::repeat;
-use core::num::Wrapping as w;
-use core::fmt;
-
-use {Rng, SeedableRng, Rand};
-
-#[allow(bad_style)]
-type w32 = w<u32>;
-
-const RAND_SIZE_LEN: usize = 8;
-const RAND_SIZE: u32 = 1 << RAND_SIZE_LEN;
-const RAND_SIZE_USIZE: usize = 1 << RAND_SIZE_LEN;
-
-/// A random number generator that uses the ISAAC algorithm[1].
-///
-/// The ISAAC algorithm is generally accepted as suitable for
-/// cryptographic purposes, but this implementation has not be
-/// verified as such. Prefer a generator like `OsRng` that defers to
-/// the operating system for cases that need high security.
-///
-/// [1]: Bob Jenkins, [*ISAAC: A fast cryptographic random number
-/// generator*](http://www.burtleburtle.net/bob/rand/isaacafa.html)
-#[derive(Copy)]
-pub struct IsaacRng {
- cnt: u32,
- rsl: [w32; RAND_SIZE_USIZE],
- mem: [w32; RAND_SIZE_USIZE],
- a: w32,
- b: w32,
- c: w32,
-}
-
-static EMPTY: IsaacRng = IsaacRng {
- cnt: 0,
- rsl: [w(0); RAND_SIZE_USIZE],
- mem: [w(0); RAND_SIZE_USIZE],
- a: w(0), b: w(0), c: w(0),
-};
-
-impl IsaacRng {
-
- /// Create an ISAAC random number generator using the default
- /// fixed seed.
- pub fn new_unseeded() -> IsaacRng {
- let mut rng = EMPTY;
- rng.init(false);
- rng
- }
-
- /// Initialises `self`. If `use_rsl` is true, then use the current value
- /// of `rsl` as a seed, otherwise construct one algorithmically (not
- /// randomly).
- fn init(&mut self, use_rsl: bool) {
- let mut a = w(0x9e3779b9);
- let mut b = a;
- let mut c = a;
- let mut d = a;
- let mut e = a;
- let mut f = a;
- let mut g = a;
- let mut h = a;
-
- macro_rules! mix {
- () => {{
- a=a^(b<<11); d=d+a; b=b+c;
- b=b^(c>>2); e=e+b; c=c+d;
- c=c^(d<<8); f=f+c; d=d+e;
- d=d^(e>>16); g=g+d; e=e+f;
- e=e^(f<<10); h=h+e; f=f+g;
- f=f^(g>>4); a=a+f; g=g+h;
- g=g^(h<<8); b=b+g; h=h+a;
- h=h^(a>>9); c=c+h; a=a+b;
- }}
- }
-
- for _ in 0..4 {
- mix!();
- }
-
- if use_rsl {
- macro_rules! memloop {
- ($arr:expr) => {{
- for i in (0..RAND_SIZE_USIZE/8).map(|i| i * 8) {
- a=a+$arr[i ]; b=b+$arr[i+1];
- c=c+$arr[i+2]; d=d+$arr[i+3];
- e=e+$arr[i+4]; f=f+$arr[i+5];
- g=g+$arr[i+6]; h=h+$arr[i+7];
- mix!();
- self.mem[i ]=a; self.mem[i+1]=b;
- self.mem[i+2]=c; self.mem[i+3]=d;
- self.mem[i+4]=e; self.mem[i+5]=f;
- self.mem[i+6]=g; self.mem[i+7]=h;
- }
- }}
- }
-
- memloop!(self.rsl);
- memloop!(self.mem);
- } else {
- for i in (0..RAND_SIZE_USIZE/8).map(|i| i * 8) {
- mix!();
- self.mem[i ]=a; self.mem[i+1]=b;
- self.mem[i+2]=c; self.mem[i+3]=d;
- self.mem[i+4]=e; self.mem[i+5]=f;
- self.mem[i+6]=g; self.mem[i+7]=h;
- }
- }
-
- self.isaac();
- }
-
- /// Refills the output buffer (`self.rsl`)
- #[inline]
- fn isaac(&mut self) {
- self.c = self.c + w(1);
- // abbreviations
- let mut a = self.a;
- let mut b = self.b + self.c;
-
- const MIDPOINT: usize = RAND_SIZE_USIZE / 2;
-
- macro_rules! ind {
- ($x:expr) => ( self.mem[($x >> 2usize).0 as usize & (RAND_SIZE_USIZE - 1)] )
- }
-
- let r = [(0, MIDPOINT), (MIDPOINT, 0)];
- for &(mr_offset, m2_offset) in r.iter() {
-
- macro_rules! rngstepp {
- ($j:expr, $shift:expr) => {{
- let base = $j;
- let mix = a << $shift;
-
- let x = self.mem[base + mr_offset];
- a = (a ^ mix) + self.mem[base + m2_offset];
- let y = ind!(x) + a + b;
- self.mem[base + mr_offset] = y;
-
- b = ind!(y >> RAND_SIZE_LEN) + x;
- self.rsl[base + mr_offset] = b;
- }}
- }
-
- macro_rules! rngstepn {
- ($j:expr, $shift:expr) => {{
- let base = $j;
- let mix = a >> $shift;
-
- let x = self.mem[base + mr_offset];
- a = (a ^ mix) + self.mem[base + m2_offset];
- let y = ind!(x) + a + b;
- self.mem[base + mr_offset] = y;
-
- b = ind!(y >> RAND_SIZE_LEN) + x;
- self.rsl[base + mr_offset] = b;
- }}
- }
-
- for i in (0..MIDPOINT/4).map(|i| i * 4) {
- rngstepp!(i + 0, 13);
- rngstepn!(i + 1, 6);
- rngstepp!(i + 2, 2);
- rngstepn!(i + 3, 16);
- }
- }
-
- self.a = a;
- self.b = b;
- self.cnt = RAND_SIZE;
- }
-}
-
-// Cannot be derived because [u32; 256] does not implement Clone
-impl Clone for IsaacRng {
- fn clone(&self) -> IsaacRng {
- *self
- }
-}
-
-impl Rng for IsaacRng {
- #[inline]
- fn next_u32(&mut self) -> u32 {
- if self.cnt == 0 {
- // make some more numbers
- self.isaac();
- }
- self.cnt -= 1;
-
- // self.cnt is at most RAND_SIZE, but that is before the
- // subtraction above. We want to index without bounds
- // checking, but this could lead to incorrect code if someone
- // misrefactors, so we check, sometimes.
- //
- // (Changes here should be reflected in Isaac64Rng.next_u64.)
- debug_assert!(self.cnt < RAND_SIZE);
-
- // (the % is cheaply telling the optimiser that we're always
- // in bounds, without unsafe. NB. this is a power of two, so
- // it optimises to a bitwise mask).
- self.rsl[(self.cnt % RAND_SIZE) as usize].0
- }
-}
-
-impl<'a> SeedableRng<&'a [u32]> for IsaacRng {
- fn reseed(&mut self, seed: &'a [u32]) {
- // make the seed into [seed[0], seed[1], ..., seed[seed.len()
- // - 1], 0, 0, ...], to fill rng.rsl.
- let seed_iter = seed.iter().map(|&x| x).chain(repeat(0u32));
-
- for (rsl_elem, seed_elem) in self.rsl.iter_mut().zip(seed_iter) {
- *rsl_elem = w(seed_elem);
- }
- self.cnt = 0;
- self.a = w(0);
- self.b = w(0);
- self.c = w(0);
-
- self.init(true);
- }
-
- /// Create an ISAAC random number generator with a seed. This can
- /// be any length, although the maximum number of elements used is
- /// 256 and any more will be silently ignored. A generator
- /// constructed with a given seed will generate the same sequence
- /// of values as all other generators constructed with that seed.
- fn from_seed(seed: &'a [u32]) -> IsaacRng {
- let mut rng = EMPTY;
- rng.reseed(seed);
- rng
- }
-}
-
-impl Rand for IsaacRng {
- fn rand<R: Rng>(other: &mut R) -> IsaacRng {
- let mut ret = EMPTY;
- unsafe {
- let ptr = ret.rsl.as_mut_ptr() as *mut u8;
-
- let slice = slice::from_raw_parts_mut(ptr, RAND_SIZE_USIZE * 4);
- other.fill_bytes(slice);
- }
- ret.cnt = 0;
- ret.a = w(0);
- ret.b = w(0);
- ret.c = w(0);
-
- ret.init(true);
- return ret;
- }
-}
-
-impl fmt::Debug for IsaacRng {
- fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
- write!(f, "IsaacRng {{}}")
- }
-}
-
-#[cfg(test)]
-mod test {
- use {Rng, SeedableRng};
- use super::IsaacRng;
-
- #[test]
- fn test_rng_32_rand_seeded() {
- let s = ::test::rng().gen_iter::<u32>().take(256).collect::<Vec<u32>>();
- let mut ra: IsaacRng = SeedableRng::from_seed(&s[..]);
- let mut rb: IsaacRng = SeedableRng::from_seed(&s[..]);
- assert!(::test::iter_eq(ra.gen_ascii_chars().take(100),
- rb.gen_ascii_chars().take(100)));
- }
-
- #[test]
- fn test_rng_32_seeded() {
- let seed: &[_] = &[1, 23, 456, 7890, 12345];
- let mut ra: IsaacRng = SeedableRng::from_seed(seed);
- let mut rb: IsaacRng = SeedableRng::from_seed(seed);
- assert!(::test::iter_eq(ra.gen_ascii_chars().take(100),
- rb.gen_ascii_chars().take(100)));
- }
-
- #[test]
- fn test_rng_32_reseed() {
- let s = ::test::rng().gen_iter::<u32>().take(256).collect::<Vec<u32>>();
- let mut r: IsaacRng = SeedableRng::from_seed(&s[..]);
- let string1: String = r.gen_ascii_chars().take(100).collect();
-
- r.reseed(&s[..]);
-
- let string2: String = r.gen_ascii_chars().take(100).collect();
- assert_eq!(string1, string2);
- }
-
- #[test]
- fn test_rng_32_true_values() {
- let seed: &[_] = &[1, 23, 456, 7890, 12345];
- let mut ra: IsaacRng = SeedableRng::from_seed(seed);
- // Regression test that isaac is actually using the above vector
- let v = (0..10).map(|_| ra.next_u32()).collect::<Vec<_>>();
- assert_eq!(v,
- vec!(2558573138, 873787463, 263499565, 2103644246, 3595684709,
- 4203127393, 264982119, 2765226902, 2737944514, 3900253796));
-
- let seed: &[_] = &[12345, 67890, 54321, 9876];
- let mut rb: IsaacRng = SeedableRng::from_seed(seed);
- // skip forward to the 10000th number
- for _ in 0..10000 { rb.next_u32(); }
-
- let v = (0..10).map(|_| rb.next_u32()).collect::<Vec<_>>();
- assert_eq!(v,
- vec!(3676831399, 3183332890, 2834741178, 3854698763, 2717568474,
- 1576568959, 3507990155, 179069555, 141456972, 2478885421));
- }
-}