blob: 984f99d4c30b0760bfe4e507e9ec9dac3a20d3b7 [file] [log] [blame]
// Copyright 2023 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build wasip1
package rand
import "syscall"
func init() {
Reader = &reader{}
type reader struct{}
func (r *reader) Read(b []byte) (int, error) {
// This uses the wasi_snapshot_preview1 random_get syscall defined in
// The definition does not explicitly guarantee that the entire buffer will
// be filled, but this appears to be the case in all runtimes tested.
err := syscall.RandomGet(b)
if err != nil {
return 0, err
return len(b), nil