1 files changed, 13 insertions, 0 deletions
diff --git a/rust/vendor/getrandom/src/emscripten.rs b/rust/vendor/getrandom/src/emscripten.rs
new file mode 100644
index 0000000..30221c6
--- /dev/null
+++ b/rust/vendor/getrandom/src/emscripten.rs
@@ -0,0 +1,13 @@
+//! Implementation for Emscripten
+use crate::{util_libc::last_os_error, Error};
+use core::mem::MaybeUninit;
+
+pub fn getrandom_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> {
+    // Emscripten 2.0.5 added getentropy, so we can use it unconditionally.
+    // Unlike other getentropy implementations, there is no max buffer length.
+    let ret = unsafe { libc::getentropy(dest.as_mut_ptr() as *mut libc::c_void, dest.len()) };
+    if ret < 0 {
+        return Err(last_os_error());
+    }
+    Ok(())
+}