24 lines
880 B
Rust
24 lines
880 B
Rust
// Copyright 2018 Developers of the Rand project.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Implementation for WASI
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use crate::Error;
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use core::num::NonZeroU32;
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use wasi::random_get;
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pub fn getrandom_inner(dest: &mut [u8]) -> Result<(), Error> {
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unsafe {
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random_get(dest.as_mut_ptr(), dest.len()).map_err(|e: wasi::Error| {
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// convert wasi's Error into getrandom's NonZeroU32 error
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// SAFETY: `wasi::Error` is `NonZeroU16` internally, so `e.raw_error()`
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// will never return 0
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NonZeroU32::new_unchecked(e.raw_error() as u32).into()
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})
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}
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}
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