1// Copyright 2017 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//go:build boringcrypto && linux && (amd64 || arm64) && !android && !msan
6
7package boring
8
9// #include "goboringcrypto.h"
10import "C"
11import "unsafe"
12
13type randReader int
14
15func (randReader) Read(b []byte) (int, error) {
16	// Note: RAND_bytes should never fail; the return value exists only for historical reasons.
17	// We check it even so.
18	if len(b) > 0 && C._goboringcrypto_RAND_bytes((*C.uint8_t)(unsafe.Pointer(&b[0])), C.size_t(len(b))) == 0 {
19		return 0, fail("RAND_bytes")
20	}
21	return len(b), nil
22}
23
24const RandReader = randReader(0)
25