Source file src/crypto/internal/sysrand/rand_wasip1.go
1 // Copyright 2023 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package sysrand 6 7 import "syscall" 8 9 func read(b []byte) error { 10 // This uses the wasi_snapshot_preview1 random_get syscall defined in 11 // https://github.com/WebAssembly/WASI/blob/23a52736049f4327dd335434851d5dc40ab7cad1/legacy/preview1/docs.md#-random_getbuf-pointeru8-buf_len-size---result-errno. 12 // The definition does not explicitly guarantee that the entire buffer will 13 // be filled, but this appears to be the case in all runtimes tested. 14 return syscall.RandomGet(b) 15 } 16