1 files changed, 19 insertions, 0 deletions
diff --git a/third_party/rust/getrandom/src/wasi.rs b/third_party/rust/getrandom/src/wasi.rs
new file mode 100644
index 0000000000..c5121824a7
--- /dev/null
+++ b/third_party/rust/getrandom/src/wasi.rs
@@ -0,0 +1,19 @@
+// Copyright 2018 Developers of the Rand project.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Implementation for WASI
+use crate::Error;
+use core::num::NonZeroU32;
+use wasi::wasi_snapshot_preview1::random_get;
+
+pub fn getrandom_inner(dest: &mut [u8]) -> Result<(), Error> {
+    match unsafe { random_get(dest.as_mut_ptr() as i32, dest.len() as i32) } {
+        0 => Ok(()),
+        err => Err(unsafe { NonZeroU32::new_unchecked(err as u32) }.into()),
+    }
+}