wasmtime_wasi/p3/random/
host.rs

1use crate::p3::bindings::random::{insecure, insecure_seed, random};
2use crate::random::WasiRandomCtx;
3use rand::RngExt;
4
5impl random::Host for WasiRandomCtx {
6    fn get_random_bytes(&mut self, len: u64) -> wasmtime::Result<Vec<u8>> {
7        Ok((&mut self.random)
8            .random_iter()
9            .take(len.min(self.max_size) as usize)
10            .collect())
11    }
12
13    fn get_random_u64(&mut self) -> wasmtime::Result<u64> {
14        Ok(self.random.random())
15    }
16}
17
18impl insecure::Host for WasiRandomCtx {
19    fn get_insecure_random_bytes(&mut self, len: u64) -> wasmtime::Result<Vec<u8>> {
20        Ok((&mut self.insecure_random)
21            .random_iter()
22            .take(len.min(self.max_size) as usize)
23            .collect())
24    }
25
26    fn get_insecure_random_u64(&mut self) -> wasmtime::Result<u64> {
27        Ok(self.insecure_random.random())
28    }
29}
30
31impl insecure_seed::Host for WasiRandomCtx {
32    fn get_insecure_seed(&mut self) -> wasmtime::Result<(u64, u64)> {
33        let seed: u128 = self.insecure_random_seed;
34        Ok((seed as u64, (seed >> 64) as u64))
35    }
36}
37
38mod named {
39    use crate::p3::bindings::named_imports::wasi::random::{insecure, insecure_seed, random};
40    use crate::random::WasiRandomNamedView;
41    use crate::{NamedId, WasiCtxNamedView};
42
43    impl<T> random::Host for WasiCtxNamedView<'_, T>
44    where
45        T: WasiRandomNamedView,
46    {
47        fn get_random_bytes(&mut self, id: NamedId, len: u64) -> wasmtime::Result<Vec<u8>> {
48            super::random::Host::get_random_bytes(&mut self.0.random(id), len)
49        }
50
51        fn get_random_u64(&mut self, id: NamedId) -> wasmtime::Result<u64> {
52            super::random::Host::get_random_u64(&mut self.0.random(id))
53        }
54    }
55
56    impl<T> insecure::Host for WasiCtxNamedView<'_, T>
57    where
58        T: WasiRandomNamedView,
59    {
60        fn get_insecure_random_bytes(
61            &mut self,
62            id: NamedId,
63            len: u64,
64        ) -> wasmtime::Result<Vec<u8>> {
65            super::insecure::Host::get_insecure_random_bytes(&mut self.0.random(id), len)
66        }
67
68        fn get_insecure_random_u64(&mut self, id: NamedId) -> wasmtime::Result<u64> {
69            super::insecure::Host::get_insecure_random_u64(&mut self.0.random(id))
70        }
71    }
72
73    impl<T> insecure_seed::Host for WasiCtxNamedView<'_, T>
74    where
75        T: WasiRandomNamedView,
76    {
77        fn get_insecure_seed(&mut self, id: NamedId) -> wasmtime::Result<(u64, u64)> {
78            super::insecure_seed::Host::get_insecure_seed(&mut self.0.random(id))
79        }
80    }
81}
wasmtime_wasi/p3/random/host.rs

wasmtime_wasi/p3/random/
host.rs
