wasmtime_wasi/host/
random.rs

1use crate::bindings::random::{insecure, insecure_seed, random};
2use crate::{WasiImpl, WasiView};
3use cap_rand::{distributions::Standard, Rng};
4
5impl<T> random::Host for WasiImpl<T>
6where
7    T: WasiView,
8{
9    fn get_random_bytes(&mut self, len: u64) -> anyhow::Result<Vec<u8>> {
10        Ok((&mut self.ctx().random)
11            .sample_iter(Standard)
12            .take(len as usize)
13            .collect())
14    }
15
16    fn get_random_u64(&mut self) -> anyhow::Result<u64> {
17        Ok(self.ctx().random.sample(Standard))
18    }
19}
20
21impl<T> insecure::Host for WasiImpl<T>
22where
23    T: WasiView,
24{
25    fn get_insecure_random_bytes(&mut self, len: u64) -> anyhow::Result<Vec<u8>> {
26        Ok((&mut self.ctx().insecure_random)
27            .sample_iter(Standard)
28            .take(len as usize)
29            .collect())
30    }
31
32    fn get_insecure_random_u64(&mut self) -> anyhow::Result<u64> {
33        Ok(self.ctx().insecure_random.sample(Standard))
34    }
35}
36
37impl<T> insecure_seed::Host for WasiImpl<T>
38where
39    T: WasiView,
40{
41    fn insecure_seed(&mut self) -> anyhow::Result<(u64, u64)> {
42        let seed: u128 = self.ctx().insecure_random_seed;
43        Ok((seed as u64, (seed >> 64) as u64))
44    }
45}
wasmtime_wasi/host/random.rs

wasmtime_wasi/host/
random.rs
