ring/bb/
word.rs

1// Copyright 2015-2024 Brian Smith.
2//
3// Permission to use, copy, modify, and/or distribute this software for any
4// purpose with or without fee is hereby granted, provided that the above
5// copyright notice and this permission notice appear in all copies.
6//
7// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
10// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
14
15use super::LeakyWord;
16
17/// A native word that may hold a secret.
18///
19/// XXX: Currently this is a type alias of `LeakyWord` so it doesn't enforce,
20/// except by convention, the prevention of leaks. This is a temporary state to
21/// support the refactorings that will
22///
23/// XXX: This isn't the native word size on targets where a pointer isn't the
24/// same size as a native word. TODO: Fix this.
25///
26/// XXX: Over time, we'll evolve Word into a newtype with an API that minimizes
27/// leaks and makes all leaks explicit, like so:
28pub(crate) type Word = LeakyWord;
29
30/* TODO:
31#[repr(transparent)]
32pub(crate) struct Word(LeakyWord);
33
34impl Word {
35    pub fn leak_word(self) -> LeakyWord { self.0 }
36}
37
38impl From<LeakyWord> for Word {
39    fn from(w: LeakyWord) -> Self {
40        // TODO: Use a stronger `black_box`.
41        Self(core::hint::black_box(w))
42    }
43}
44*/
ring/bb/word.rs

ring/bb/
word.rs
