1 files changed, 22 insertions, 0 deletions
diff --git a/third_party/rust/getrandom/src/openbsd.rs b/third_party/rust/getrandom/src/openbsd.rs
new file mode 100644
index 0000000000..7a76f61d5b
--- /dev/null
+++ b/third_party/rust/getrandom/src/openbsd.rs
@@ -0,0 +1,22 @@
+// 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 OpenBSD
+use crate::{util_libc::last_os_error, Error};
+use core::mem::MaybeUninit;
+
+pub fn getrandom_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> {
+    // getentropy(2) was added in OpenBSD 5.6, so we can use it unconditionally.
+    for chunk in dest.chunks_mut(256) {
+        let ret = unsafe { libc::getentropy(chunk.as_mut_ptr() as *mut libc::c_void, chunk.len()) };
+        if ret == -1 {
+            return Err(last_os_error());
+        }
+    }
+    Ok(())
+}