Joe Richey
a29180afcd
Right now, while our implementations for stdweb and wasm-bindgen use similar APIs, they do not use similar implementations. This change: - Switches to using the same error codes for both implementations - Uses error codes that detail exactly what API is missing - Cleans up the implemetnations to make them much more readable - Consitantly use thread_local in both implementations This makes issues easier to debug and the code easier to understand. Signed-off-by: Joe Richey <joerichey@google.com>
getrandom
A Rust library for retrieving random data from (operating) system source. It is
assumed that system always provides high-quality cryptographically secure random
data, ideally backed by hardware entropy sources. This crate derives its name
from Linux's getrandom function, but is cross platform, roughly supporting
the same set of platforms as Rust's std lib.
This is a low-level API. Most users should prefer using high-level random-number
library like rand.
Usage
Add this to your Cargo.toml:
[dependencies]
getrandom = "0.2"
Then invoke the getrandom function:
fn get_random_buf() -> Result<[u8; 32], getrandom::Error> {
let mut buf = [0u8; 32];
getrandom::getrandom(&mut buf)?;
Ok(buf)
}
Features
This library is no_std for every supported target. However, getting randomness
usually requires calling some external system API. This means most platforms
will require linking against system libraries (i.e. libc for Unix,
Advapi32.dll for Windows, Security framework on iOS, etc...).
For the wasm32-unknown-unknown target, one of the following features should be
enabled:
By default, compiling getrandom for an unsupported target will result in
a compilation error. If you want to build an application which uses getrandom
for such target, you can either:
- Use
[replace]or[patch]section in yourCargo.tomlto switch to a custom implementation with a support of your target.
Minimum Supported Rust Version
This crate requires Rust 1.33.0 or later.
License
The getrandom library is distributed under either of
at your option.