tor_llcrypto/util/
rng.rs

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1//! Prng utilities.
2
3/// Helper to implement rand_core_06 for an Rng providing RngCore from rand_core 0.9.
4///
5/// We need this (for now) for compatibility with *-dalek and
6/// some other crypto libraries.
7///
8/// (Please avoid propagating this type outside of the tor-llcrypto crate.
9/// If you need it for a legacy crypto tool, it is usually better to wrap
10/// that tool with an API that uses RngCompat.)
11#[cfg_attr(feature = "rng-compat", visibility::make(pub))]
12pub struct RngCompat<R>(R);
13
14impl<R> RngCompat<R> {
15    /// Create a ne RngCompat to wrap `rng`
16    #[cfg_attr(feature = "rng-compat", visibility::make(pub))]
17    pub(crate) fn new(rng: R) -> Self {
18        Self(rng)
19    }
20}
21
22impl<R: rand_core::RngCore> rand_core_06::RngCore for RngCompat<R> {
23    fn next_u32(&mut self) -> u32 {
24        self.0.next_u32()
25    }
26
27    fn next_u64(&mut self) -> u64 {
28        self.0.next_u64()
29    }
30
31    fn fill_bytes(&mut self, dest: &mut [u8]) {
32        self.0.fill_bytes(dest);
33    }
34
35    fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), rand_core_06::Error> {
36        self.0.fill_bytes(dest);
37        Ok(())
38    }
39}
40impl<R: rand_core::CryptoRng> rand_core_06::CryptoRng for RngCompat<R> {}
41
42impl<R: rand_core_06::RngCore> rand_core::RngCore for RngCompat<R> {
43    fn next_u32(&mut self) -> u32 {
44        self.0.next_u32()
45    }
46
47    fn next_u64(&mut self) -> u64 {
48        self.0.next_u64()
49    }
50
51    fn fill_bytes(&mut self, dest: &mut [u8]) {
52        self.0.fill_bytes(dest);
53    }
54}
55
56impl<R: rand_core_06::CryptoRng + rand_core_06::RngCore> rand_core::CryptoRng for RngCompat<R> {}
tor_llcrypto/util/rng.rs

tor_llcrypto/util/
rng.rs
