hpke_http/
entropy.rs

1//! Fallible entropy injection.
2
3use crate::Error;
4
5/// A source of cryptographically secure random bytes.
6pub trait EntropySource {
7    /// Fill the destination or return before any protocol output is produced.
8    ///
9    /// # Errors
10    ///
11    /// Returns [`Error::EntropyUnavailable`] when the source cannot fill the
12    /// entire destination with cryptographically secure random bytes.
13    fn fill(&mut self, destination: &mut [u8]) -> Result<(), Error>;
14}
15
16/// The operating system or Web Crypto entropy source selected by `getrandom`.
17#[derive(Clone, Copy, Debug, Default)]
18pub struct SystemEntropy;
19
20impl EntropySource for SystemEntropy {
21    fn fill(&mut self, destination: &mut [u8]) -> Result<(), Error> {
22        getrandom::fill(destination).map_err(|_| Error::EntropyUnavailable)
23    }
24}
hpke_http/entropy.rs

hpke_http/
entropy.rs
